A hand valve opening and closing device and operating method

Abstract

This invention discloses a manual valve opening and closing device and operating method, belonging to the field of industrial valve safety and energy isolation technology. The opening and closing device includes: a transmission cylinder having a three-section stepped inner hole consisting of an upper inner hole, a middle inner hole, and a lower inner hole from top to bottom; a transmission block with a transmission tooth groove on its upper end face, the transmission block being fitted into the upper inner hole; a closing device located above the transmission block; the closing device includes a movable blocking part and a lever, wherein the movable blocking part blocks the transmission tooth groove when the lever is moved in a first direction, and exposes the transmission tooth groove when the lever is moved in the opposite direction; a sliding sleeve; a transmission head with transmission teeth at its lower end, the transmission head being axially slidably disposed within the sliding sleeve; and a handle detachably connected to the sliding sleeve. This invention effectively prevents unauthorized personnel from operating the valve using external tools.

Description

Technical Field

[0001] This invention belongs to the field of industrial valve safety and energy isolation technology, and in particular relates to a manual valve opening and closing device and operating method. Background Technology

[0002] Manual valves (such as gate valves, globe valves, and ball valves) are widely used in pipeline systems in industries such as petroleum, chemical, and power to cut off or connect the flow of media. In scenarios such as equipment maintenance and pipeline upkeep, it is necessary to perform operations such as shutting off the energy source to isolate the valve or opening it to drain residual energy, and this must be verified by energy testing to ensure the reliability of energy isolation and the safety of personnel. In daily production scenarios, it is also necessary to lock the valve's open / closed state to prevent unauthorized misoperation.

[0003] The conventional operation method for existing manual valves is as follows: the operator locates the designated valve according to the work order, manually checks the nameplate label, and then rotates the valve stem by handwheel to complete the opening and closing operation. This method has two shortcomings: firstly, the identification of the valve operation object and the judgment of its position rely on the operator's personal experience, lacking objective verification and recording methods, making it impossible to trace and audit afterwards, and prone to misoperation and omission; secondly, the handwheel of manual valves is usually exposed and lacks a physical sealing and locking structure, which cannot effectively prevent unauthorized personnel from changing the valve status, posing a safety hazard. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a manual valve opening and closing device and operation method, which can effectively prevent unauthorized personnel from operating the valve without authorization through external tools.

[0005] This invention is achieved through the following technical solution:

[0006] The first aspect of the present invention discloses a manual valve opening and closing device, comprising:

[0007] The transmission cylinder has a three-section stepped inner hole, consisting of an upper inner hole, a middle inner hole, and a lower inner hole, arranged from top to bottom. The lower inner hole is a polygonal hole that matches the outer circumferential shape of the drive nut, so that the transmission cylinder is circumferentially fixed to the drive nut when it is sleeved on the drive nut. The diameter of the middle inner hole is larger than the outer diameter of the fixing nut on the valve stem, and is used to accommodate the fixing nut when the transmission cylinder is sleeved on the drive nut.

[0008] A transmission block has a through hole extending axially through its center, and a transmission tooth groove is provided around the through hole on the upper end face of the transmission block; the transmission block is embedded and fixed in the upper section of the inner hole of the transmission cylinder, and the through hole is used for the valve stem to pass through.

[0009] A sealing device is provided above the transmission block; the sealing device includes a movable blocking part and a toggle block that are linked together. When the toggle block is toggled in a first direction, the movable blocking part moves to above the transmission tooth groove to block the transmission tooth groove. When the toggle block is toggled in a second direction opposite to the first direction, the movable blocking part moves away from above the transmission tooth groove to expose the transmission tooth groove. An RFID tag is provided on the outside of the movable blocking part.

[0010] A sliding sleeve, the lower end of which is provided with an RFID antenna coil;

[0011] A transmission head, the lower end of which is provided with transmission teeth that are adapted to the transmission tooth groove, the transmission head is slidably disposed in the sliding sleeve along the axial direction; the transmission head has an extended position and a retracted position, in the extended position the transmission teeth protrude from the lower end face of the sliding sleeve, in the retracted position the transmission teeth are housed in the sliding sleeve.

[0012] A handle, wherein the handle is detachably connected to a sliding sleeve;

[0013] The opening and closing device also includes a controller, a rotation count sensor, an RFID reader, and a torque sensor. The torque sensor is disposed on the torque transmission path. The controller is electrically connected to the rotation count sensor, the torque sensor, and the RFID reader, respectively. The RFID reader is electrically connected to the RFID antenna coil.

[0014] Furthermore, the movable shielding part includes a fixed plate, a drive disk, and multiple fan-shaped closed petals. The fixed plate and the drive disk are both plates with a circular central hole. The fixed plate and the drive disk are spaced apart from bottom to top. The multiple fan-shaped closed petals are sandwiched between the fixed plate and the drive disk and surround to form an openable and closable central ring. The transmission tooth groove is located below the central ring. The toggle block is located on the edge of the drive disk. The RFID tag is located on the edge of the drive disk.

[0015] Furthermore, the fixed plate is provided with an arc-shaped guide groove, one end of which faces the circular central hole and the other end extends outward; the drive disk is provided with a straight sliding groove, which is a straight groove that deviates from the circular central hole; the fan-shaped closing petal is provided with a cylinder extending downward into the arc-shaped guide groove and a slider extending upward into the straight sliding groove; when the drive disk rotates, it drives the fan-shaped closing petal through the straight sliding groove and the slider, and causes the cylinder to slide along the arc-shaped guide groove, so as to tighten or loosen the central ring.

[0016] Furthermore, the opening and closing device also includes a housing and a top cover, which together form a cavity. The transmission cylinder and the sealing device are located inside the cavity, and the lever extends out of the cavity. Locking holes are correspondingly provided on the housing, the drive disc, and the fixing plate. When the central ring is tightened, the locking holes on the housing, the drive disc, and the fixing plate are aligned, allowing the lock to pass through and restrict the rotation of the drive disc.

[0017] Furthermore, an axial anti-rotation fit structure is provided between the outer peripheral surface of the transmission head and the inner peripheral surface of the sliding sleeve. One of the outer peripheral surface of the transmission head and the inner peripheral surface of the sliding sleeve is provided with an axially extending sliding groove, and the other is provided with an elastic positioning bead. The bead body of the elastic positioning bead cooperates with two positioning recesses in the sliding groove corresponding to the extended position and the retracted position, so as to position the transmission head in the extended position or the retracted position.

[0018] Furthermore, the opening and closing device also includes a locking key, which is wirelessly connected to the controller. The locking key is used to receive authorization instructions issued by the backend platform and to perform locking or unlocking operations.

[0019] Furthermore, the handle is a long strip structure or a circular handwheel structure, and the handle and the sliding sleeve are connected by a thread or a snap-fit ​​connection.

[0020] The second aspect of the present invention discloses an operating method for a manual valve opening and closing device, applied to the opening and closing device described in the first aspect of the present invention, the operating method comprising:

[0021] The controller performs its self-test and establishes a wireless connection between the controller and the locking key;

[0022] The RFID reader reads the RFID tag on the valve, and the controller matches the read information with the equipment information in the received electronic work order. Once the match is successful, the controller retrieves the calibration parameters.

[0023] Move the lever to open the sealing device, exposing the transmission tooth groove. Press down the transmission head to make the transmission teeth engage with the transmission tooth groove. Rotate the handle to the fully open position of the valve. The controller records the zero-position reference and clears the data of the rotation sensor to zero.

[0024] Rotating the handle performs valve opening and closing operations. During the operation, the controller collects the number of rotations and torque data in real time and compares them with the pre-stored calibration curve. An alarm is issued when there is an abnormality.

[0025] Once the number of revolutions enters the calibration tolerance range, the controller switches to torque priority judgment mode. When the torque data reaches the calibration torque and remains stable for a preset duration, the operation is determined to be in place, and a digital operation certificate is generated.

[0026] Lift the transmission head to disengage the transmission teeth from the transmission tooth groove, then move the lever to close the sealing device and block the transmission tooth groove.

[0027] The locking device is activated by the controller using a digital operating credential to activate the locking key.

[0028] Furthermore, during the locking process, the RFID tag is continuously read by the RFID antenna coil at the lower end of the sliding sleeve, and the number of rotations is monitored to ensure that the sliding sleeve does not disengage from the operating position before locking is completed.

[0029] Furthermore, the electronic work order is issued from the backend platform to the controller and the locking key. The electronic work order includes manual valve information, opening and closing requirements, operation time field, and calibration number of turns and calibration torque determined based on the manual valve information.

[0030] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0031] (1) The present invention uses the movable shielding part to physically shield and lock the transmission tooth groove. Only by releasing the lock and moving the lever can the transmission tooth groove be exposed and the transmission head be inserted for operation. This fundamentally eliminates the safety hazards caused by the exposed transmission interface of the traditional manual valve and can effectively prevent unauthorized personnel from operating the valve with external tools.

[0032] (2) The present invention uses a lap count sensor and a torque sensor in conjunction with a controller to collect lap count data and torque data in real time during the operation process, and dynamically compares them with the pre-stored calibration curve. When the lap count enters the calibration tolerance range, it automatically switches to the torque priority judgment mode. When the torque reaches the calibration value and remains stable, it is determined that the operation is in place and a digital operation certificate is generated. This realizes the objectivity and standardization of the operation in place judgment and avoids the uncertainty of relying on human experience judgment.

[0033] (3) The present invention activates the locking key with a digital operation certificate after the operation is in place to perform the locking, and simultaneously and effectively executes the "operation in place" and "physical locking" and leaves a digital certificate. During the locking process, the RFID antenna coil continuously reads the RFID tag and monitors the number of cycles to ensure that the sliding sleeve does not disengage from the fitting position of the cover of the sealing device before the locking is completed, thereby blocking the operation hole and preventing the manual valve from being operated by other tools. This effectively prevents the risk of the valve state being accidentally changed after the operation is in place.

[0034] (4) The present invention records manual valve information, opening and closing requirements and calibration parameters through electronic work tickets. The operation data can be synchronized to the back-end platform for archiving, which is convenient for subsequent traceability.

[0035] (5) The present invention identifies the sealing device itself by setting an RFID tag on the sealing device and binds it with the valve file information to realize valve identification and prevent misoperation of non-target valves;

[0036] (6) The present invention makes the operation process of manual valves traceable, ensuring that the operation object is correct, the operation is in place and the judgment is objective, and the operation is reliably locked after the operation. Attached Figure Description

[0037] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0038] Figure 1 This is a schematic diagram of the upper section of the valve stem in a manual valve.

[0039] Figure 2 This is a schematic diagram of the structure of a handwheel-driven valve for opening and closing in the prior art;

[0040] Figure 3 This is a cross-sectional structural schematic diagram of the opening and closing device when the valve core descends to the position and the flow channel is closed in this invention;

[0041] Figure 4 This is a cross-sectional structural schematic diagram of the opening and closing device when the valve core moves upward to the position and the flow channel opens in this invention;

[0042] Figure 5 This is a schematic diagram of one installation of the transmission cylinder and transmission block on the valve stem in this invention;

[0043] Figure 6 This is a schematic diagram illustrating one possible fit between the sliding sleeve and the transmission head in this invention;

[0044] Figure 7 This is a schematic diagram of a structure using a long strip handle in this invention;

[0045] Figure 8 This is a schematic diagram of a structure using a circular handwheel handle in this invention;

[0046] Figure 9 This is a schematic diagram showing one installation position of the fixing plate and the fan-shaped closing petals in this invention;

[0047] Figure 10 This is a schematic diagram showing the central ring formed by the fan-shaped closed petals in the present invention in a loosened state;

[0048] Figure 11 This is a schematic diagram showing the central ring formed by the fan-shaped closed petals in the present invention in a tightened state;

[0049] Figure 12This is a schematic diagram of a circular arc guide groove on the fixing plate in this invention;

[0050] Figure 13 This is a schematic diagram of a straight sliding groove on the drive disk in this invention;

[0051] Figure 14 This is a schematic diagram showing the position of the cylinder on the sector-shaped closed petal in this invention;

[0052] Figure 15 This is a schematic diagram showing the position of the slider on the sector-shaped closed petal in this invention;

[0053] Figure 16 A schematic diagram illustrating the principle of detecting when the transmission head is in the retracted position;

[0054] Figure 17 A schematic diagram illustrating the principle of detecting when the transmission head is in the extended position;

[0055] Figure 18 This is a flowchart illustrating one method of operation in this invention;

[0056] In the diagram, 1—valve stem, 2—drive nut, 3—fixed nut, 4—handwheel, 5—transmission cylinder, 6—transmission block, 7—sealing device, 71—fixed plate, 72—fan-shaped sealing petal, 73—drive disc, 74—toggle block, 75—circular arc guide groove, 76—straight slide groove, 77—cylinder, 78—slider, 8—sliding sleeve, 81—first Hall sensor, 82—second Hall sensor, 9—transmission head, 91—first magnet, 92—second magnet, 10—handle, 11—controller, 12—lock, 13—housing, 14—top cover, 15—key. Detailed Implementation

[0057] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0058] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0059] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing the present invention and 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0060] In the description of this invention, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating a connection between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0061] like Figures 1 to 18 As shown in the figure, this embodiment discloses a manual valve opening and closing device and its operation method.

[0062] like Figure 1 As shown, a manual valve typically includes a valve body, a valve stem 1, a drive nut 2, and a fixing nut 3. The valve stem 1 is rotatably inserted into the valve body. The inner hole of the drive nut 2 has a T-shaped thread, and the upper section of the valve stem 1 has a T-shaped thread. The drive nut 2 is fixedly sleeved on the upper section of the valve stem 1 and threadedly connected to the valve stem 1. Figure 2 As shown, in the prior art, a handwheel 4 is typically fitted onto the drive nut 2; a fixing nut 3 is screwed onto the top of the drive nut 2 to axially lock the handwheel onto the drive nut 2. Rotating the handwheel 4 drives the drive nut 2 to rotate, and the valve stem 1 moves up and down under the action of the drive nut 2, thereby realizing the opening and closing of the valve.

[0063] The first aspect of this embodiment discloses a manual valve opening and closing device, such as... Figure 3 and Figure 4 As shown, the opening and closing device includes a transmission cylinder 5, a transmission block 6, a sealing device 7, a sliding sleeve 8, a transmission head 9, and a handle 10.

[0064] like Figure 5As shown, the transmission cylinder 5 has a three-section stepped inner hole, consisting of an upper inner hole, a middle inner hole, and a lower inner hole, arranged from top to bottom. The lower inner hole is a polygonal hole that matches the outer circumferential shape of the drive nut 2, so that the transmission cylinder 5 is circumferentially fixed to the drive nut 2 when it is sleeved on the drive nut 2. The diameter of the middle inner hole is larger than the outer diameter of the fixing nut 3 on the valve stem 1, and is used to accommodate the fixing nut 3 when the transmission cylinder 5 is sleeved on the drive nut 2.

[0065] Specifically, the three-section stepped inner hole extends axially through the transmission cylinder 5. The three-section stepped inner hole includes an upper inner hole, a middle inner hole, and a lower inner hole, all of which are cylindrical holes. Adjacent inner holes are transitioned by an annular stepped surface perpendicular to the axis. The connection between the upper and middle inner holes forms a first annular stepped surface, and the connection between the middle and lower inner holes forms a second annular stepped surface. The diameter of the upper inner hole is larger than that of the middle inner hole, and the diameter of the middle inner hole is larger than that of the lower inner hole.

[0066] The lower inner hole is a polygonal hole, and its cross-sectional shape is consistent with the outer circumferential cross-sectional shape of the drive nut 2. For example, the cross-sectional shape of the lower inner hole is an inner hexagon, an inner square, or an inner dodecagon. When the transmission cylinder 5 is fitted into the valve stem 1, the hole wall of the lower inner hole forms a circumferential limiting fit with the outer circumferential surface of the drive nut 2, so that the transmission cylinder 5 can drive the drive nut 2 to rotate synchronously.

[0067] The inner hole of the middle section is circular, with a diameter larger than the maximum circumscribed circle diameter of the fixing nut 3, ensuring that the fixing nut 3 can be completely accommodated within the inner hole when the transmission cylinder 5 is inserted. A radial clearance exists between the inner wall of the middle section and the outer circumferential surface of the fixing nut 3, preventing contact and motion interference between them. The axial height of the inner hole of the middle section is greater than or equal to the axial thickness of the fixing nut 3, ensuring that the fixing nut 3 can be fully accommodated.

[0068] The upper inner hole is used to accommodate and fix the transmission block 6.

[0069] The transmission block 6 has a through hole extending axially through its center, and the upper end face of the transmission block 6 is provided with a transmission tooth groove around the through hole; the transmission block 6 is embedded and fixed in the upper section of the inner hole of the transmission cylinder 5, and the through hole is used for the valve stem 1 to pass through.

[0070] Specifically, the outer peripheral surface of the transmission block 6 is assembled with the inner wall of the upper section of the transmission cylinder 5 using an interference fit or a transition fit, and is further fixed by axially inserted set screws to ensure that there is no relative movement between the transmission block 6 and the transmission cylinder 5. The lower end face of the transmission block 6 abuts against the first annular step surface; the upper end face of the transmission block 6 is preferably flush with the upper end face of the transmission cylinder 5 to facilitate the arrangement of the sealing device 7.

[0071] The transmission grooves are multiple independent axial grooves formed on the upper end face of the transmission block 6, with each groove evenly distributed circumferentially around the central axis of the through hole. The cross-sectional shape of the transmission grooves is rectangular, trapezoidal, or V-shaped. The transmission grooves are used to engage with the transmission teeth of the transmission head 9, transmitting the rotational motion of the transmission head 9 to the transmission cylinder 5 via the transmission block 6.

[0072] The diameter of the through hole at the center of the transmission block 6 is larger than the outer diameter of the valve stem 1, so that the valve stem 1 can pass freely through the through hole.

[0073] The sealing device 7 is located above the transmission block 6; the sealing device 7 includes a movable blocking part and a toggle block 74 that are linked together. When the toggle block 74 is toggled in a first direction, the movable blocking part moves to above the transmission tooth groove to block the transmission tooth groove. When the toggle block 74 is toggled in a second direction opposite to the first direction, the movable blocking part moves away from above the transmission tooth groove to expose the transmission tooth groove. An RFID tag is provided on the outside of the movable blocking part.

[0074] The lower end of the sliding sleeve 8 is equipped with an RFID antenna coil. Specifically, the sliding sleeve 8 is a cylindrical component extending axially, with an annular mounting groove on its lower end face, in which the RFID antenna coil is embedded. The RFID antenna coil is electrically connected to an RFID reader. During operation, when the lower end face of the sliding sleeve 8 is close to the RFID tag, the RFID antenna coil emits a radio frequency signal and provides energy. The RFID tag obtains energy from the radio frequency signal and is activated. Subsequently, the RFID antenna coil receives the encoded information carried in the radio frequency signal returned by the tag.

[0075] like Figure 6 As shown, the lower end of the transmission head 9 is provided with transmission teeth that are adapted to the transmission tooth groove. The transmission head 9 is slidably disposed in the sliding sleeve 8 along the axial direction. The transmission head 9 has an extended position and a retracted position. In the extended position, the transmission teeth protrude from the lower end face of the sliding sleeve 8. In the retracted position, the transmission teeth are housed in the sliding sleeve 8.

[0076] Specifically, the transmission head 9 is a rod-shaped component extending axially along the sliding sleeve 8. Transmission teeth are integrally formed on the lower end face of the transmission head 9. The cross-sectional shape, number, and circumferential distribution of the transmission teeth correspond one-to-one with the transmission tooth grooves of the transmission block 6, allowing the transmission teeth to be axially embedded in each transmission tooth groove, forming a circumferential limiting fit, and transmitting the rotational motion of the transmission head 9 to the transmission block 6. The axial height of the transmission teeth is less than or equal to the groove depth of the transmission tooth groove, ensuring that the transmission teeth can be fully embedded in the transmission tooth groove. A pressing part is provided at the upper end of the transmission head 9. The outer diameter of the pressing part is larger than the inner diameter of the inner hole of the sliding sleeve 8 to limit the downward sliding limit of the transmission head 9 and prevent the transmission head 9 from falling off the lower end of the sliding sleeve 8.

[0077] The handle 10 is detachably connected to the sliding sleeve 8.

[0078] Specifically, the handle 10 is a long component or a handwheel-shaped component that the operator grips and applies rotational force to, such as... Figure 7 and Figure 8 As shown. The detachable connection between the handle 10 and the slide sleeve 8 facilitates the replacement of different sizes or types of slide sleeve 8 and drive head 9 assemblies according to different valve specifications.

[0079] The opening and closing device also includes a controller, a rotation count sensor, an RFID reader, and a torque sensor. The torque sensor is disposed on the torque transmission path. The controller is electrically connected to the rotation count sensor, the torque sensor, and the RFID reader, respectively. The RFID reader is electrically connected to the RFID antenna coil.

[0080] The rotation count sensor is used to detect the number of rotations during operation. The rotation count sensor can be mounted on the handle 10, the sliding sleeve 8, or the transmission head 9. The torque sensor is used to detect the applied torque value during operation. The torque sensor can be mounted on the handle 10 or the transmission head 9. The controller can be mounted on the handle 10 or on the sliding sleeve 8 via an electrical box. For example, the controller is located inside the electrical box, which is mounted on the sliding sleeve 8. The controller collects rotation count data through the rotation count sensor, torque data through the torque sensor, and RFID tag information through the RFID reader.

[0081] In some implementations of this embodiment, such as Figure 9 , Figure 10 and Figure 11 As shown, the movable shielding part includes a fixed plate 71, a drive disk 73, and multiple fan-shaped closed petals 72. The fixed plate 71 and the drive disk 73 are both plates with a circular central hole. The fixed plate 71 and the drive disk 73 are spaced apart from bottom to top. The multiple fan-shaped closed petals 72 are sandwiched between the fixed plate 71 and the drive disk 73 and surround to form an openable and closable central ring. The transmission tooth groove is located below the central ring. The toggle block 74 is located on the edge of the drive disk 73. The RFID tag is located on the edge of the drive disk 73.

[0082] In these embodiments, the fixed plate 71 is the lower, stationary plate, and its circular central hole is aligned axially with the transmission gear groove. The drive disk 73 is the upper, rotatable plate, and its circular central hole is coaxially arranged with the circular central hole of the fixed plate 71. The drive disk 73 can rotate relative to the fixed plate 71 within a preset angle range around its central axis. The fan-shaped closing petals 72 are multiple independent fan-shaped thin plates, arranged sequentially along the circumference, with the inner arc edges of each fan-shaped closing petal 72 forming the central ring. The consistent geometry and size of each fan-shaped closing petal 72 ensure the synchronicity and uniformity of the opening and closing of the central ring, while also facilitating mass production and assembly. When the fan-shaped closing petals 72 retract inward, the diameter of the central ring decreases, and the reduced diameter is smaller than the distribution circle diameter of the transmission gear groove. The petals of the fan-shaped closing petals 72 cover the top of the transmission gear groove, forming a shield, such as... Figure 10 As shown; when the fan-shaped closed petals 72 expand outwards, the diameter of the central ring increases, and the enlarged diameter is larger than the distribution circle diameter of the transmission tooth grooves, so the transmission tooth grooves are fully exposed, as shown. Figure 11 As shown.

[0083] In some implementations of this embodiment, such as Figure 12 As shown, the fixing plate 71 is provided with an arc-shaped guide groove 75, one end of which faces the circular center hole and the other end extends outward; as Figure 13 As shown, the drive disk 73 is provided with a straight sliding groove 76, which is a straight groove offset from the circular center hole; as Figure 14 and Figure 15 As shown, the fan-shaped closed petal 72 is provided with a cylinder 77 extending downward into the arc guide groove 75 and a slider 78 extending upward into the straight slide groove 76; when the drive disk 73 rotates, it drives the fan-shaped closed petal 72 through the straight slide groove 76 and the slider 78, and causes the cylinder 77 to slide along the arc guide groove 75, so that the central ring tightens or loosens.

[0084] Specifically, an arc-shaped guide groove 75 is formed on the upper surface of the fixed plate 71, and its trajectory is an arc. One end of the arc is close to the edge of the inner hole of the fixed plate 71, and the other end extends radially outward. A straight groove 76 is formed on the plate body of the drive disk 73. The extension direction of the straight groove deviates from the circular center hole of the drive disk 73 by a certain distance (i.e., it does not extend along the radial direction of the drive disk 73), but is inclined at a certain angle to the radial direction. The number of arc-shaped guide grooves 75 and the number of straight grooves 76 are equal to the number of fan-shaped closing petals 72, and both are evenly distributed in the circumferential direction. A cylinder 77 is fixed on the lower surface of each fan-shaped closing petal 72. The cylinder 77 protrudes downward and extends into a corresponding arc-shaped guide groove 75. The outer diameter of the cylinder 77 and the groove width of the arc-shaped guide groove 75 are in sliding fit. Each sector-shaped closed petal 72 has a slider 78 fixedly mounted on its upper surface. The slider 78 protrudes upward and extends into a corresponding straight groove 76. The outer contour of the slider 78 and the groove width of the straight groove 76 are in sliding fit. The cylinder 77 and the slider 78 can be arranged on the same axis, or they can be staggered on the sector-shaped closed petal 72, depending on whether the desired motion trajectory is achieved without causing motion interference.

[0085] In these embodiments, the principle of the sealing device 7 is as follows: When the user moves the lever 74 in the first direction, the drive disk 73 rotates around its central axis, and each straight slide groove 76 on the drive disk 73 rotates synchronously with the drive disk 73. The groove wall of the straight slide groove 76 pushes the slider 78 on the fan-shaped sealing petal 72, so that the fan-shaped sealing petal 72 is subjected to a force along the extension direction of the straight slide groove 76. At the same time, the cylinder 77 at the lower end of the fan-shaped sealing petal 72 is constrained by the arc guide groove 75 on the fixed plate 71, and can only slide along the arc trajectory of the arc guide groove 75. The linear push of the straight slide groove 76 and the arc constraint of the arc guide groove 75 work together on the fan-shaped sealing petal 72, so that the fan-shaped sealing petal 72 rotates itself while moving in the circumferential direction. The overall manifestation is that the inner arc edges of each fan-shaped sealing petal 72 synchronously converge radially inward, and the central ring tightens. When the user moves the lever 74 in the second direction opposite to the first direction, the drive disk 73 rotates in the opposite direction, and each sector-shaped closed petal 72 expands outward synchronously under the opposite action of the straight slide groove 76 and the arc guide groove 75, and the central ring is released.

[0086] In some embodiments of this example, the opening and closing device further includes a housing and a top cover 14, which together form a cavity. The transmission cylinder 5 and the sealing device 7 are located inside the cavity, and the lever 74 extends outside the cavity. Locking holes are correspondingly provided on the housing, the drive disc 73, and the fixing plate 71. When the central ring is tightened, the locking holes on the housing, the drive disc 73, and the fixing plate 71 are aligned, allowing the lock 12 to pass through and restrict the rotation of the drive disc 73.

[0087] Specifically, the inner cavity of the outer casing has at least one annular stepped surface. The fixing plate 71 is fixed to the annular stepped surface by screws to keep the fixing plate 71 stationary during the operation of the closing device 7. The bottom wall of the outer casing has a bottom opening with a diameter smaller than the outer diameter of the lower part of the transmission cylinder 5. The bottom end face of the transmission cylinder 5 abuts against the inner side of the bottom wall of the outer casing, so that the transmission cylinder 5 is axially confined in the inner cavity of the outer casing and cannot be dislodged from the bottom opening. The side wall of the outer casing has an arc-shaped slot extending circumferentially. The lever 74 passes through the arc-shaped slot radially and extends outward to the outside of the outer casing. The circumferential arc length of the arc-shaped slot determines the range of rotation angles of the lever 74 and the drive disk 73. The top cover 14 is fixed to the top end face of the outer casing and is fixedly connected to the outer casing by a plurality of screws distributed circumferentially. The top wall of the top cover 14 has a central opening, which is axially aligned with the central ring of the closing device 7 for the lower ends of the transmission head 9 and the sliding sleeve 8 to pass through.

[0088] The top of the outer casing has at least one axially penetrating lock hole. When the closing device 7 is in the blocked state (i.e., the central ring is tightened), the lock holes on the outer casing, the drive disc 73, and the fixing plate 71 are aligned axially, allowing the lock 12 to pass through them sequentially from top to bottom to circumferentially lock the drive disc 73 relative to the outer casing and the fixing plate 71. The upper cover 14 also has a clearance area corresponding to the position of the lock hole on the outer casing, which exposes the lock hole on the outer casing, allowing the lock 12 to pass through the clearance area from top to bottom into the lock hole on the outer casing. The clearance area is a notch opened at the edge of the top wall of the upper cover 14 or a through hole opened in the upper cover 14.

[0089] In some embodiments of this example, a keyhole RFID tag is provided inside the keyhole, and a lock RFID reader is provided on the lock 12. When the lock 12 is inserted into the keyhole, the lock RFID reader identifies the keyhole RFID tag, and performs a locking action after successful verification. For the specific implementation method of locking by inserting the lock 12 into the keyhole, please refer to the lock solution described in the applicant's previously filed patent (authorization announcement number CN120148144B, titled "A Millimeter-level Precision Point Locking and Tagging System and Method").

[0090] In some embodiments of this example, an axial anti-rotation fit structure is provided between the outer peripheral surface of the transmission head 9 and the inner peripheral surface of the sliding sleeve 8. One of the outer peripheral surface of the transmission head 9 and the inner peripheral surface of the sliding sleeve 8 is provided with a sliding groove extending along the axial direction, and the other is provided with an elastic positioning bead. The bead body of the elastic positioning bead cooperates with two positioning recesses in the sliding groove corresponding to the extended position and the retracted position, so as to position the transmission head 9 in the extended position or the retracted position.

[0091] Specifically, the axial anti-rotation fit structure ensures that the transmission head 9 can only slide axially within the sliding sleeve 8 and cannot rotate relative to the sliding sleeve 8 around its own axis, thereby ensuring that the torque can be reliably transmitted to the transmission head 9 through the sliding sleeve 8 when the handle 10 is rotated. One specific implementation of the axial anti-rotation fit structure is as follows: at least one section of the outer circumferential surface of the transmission head 9 is machined into a non-circular cross-section, such as a regular hexagonal cross-section, a regular quadrilateral cross-section, a spline cross-section, or a single keyway cross-section, and the corresponding section of the inner hole of the sliding sleeve 8 is machined into a matching cross-sectional shape. The two form a surface fit, so that the transmission head 9 and the sliding sleeve 8 are locked together in the circumferential direction, but can slide freely in the axial direction.

[0092] The sliding groove is a recessed channel of a certain length, extending axially along the outer peripheral surface of the transmission head 9. A first positioning recess is formed on the bottom or side surface of the sliding groove corresponding to the extended position of the transmission head 9, and a second positioning recess is formed corresponding to the retracted position of the transmission head 9. The two positioning recesses are spaced apart axially. An elastic positioning ball is installed in a radial mounting hole in the side wall of the sliding sleeve 8. It includes a housing 13, a compression spring, and a steel ball. Under the biasing force of the spring, the steel ball is pushed out towards the inner hole of the sliding sleeve 8 and abuts against the bottom surface of the sliding groove. When the transmission head 9 slides axially to the extended position, the steel ball falls into the first positioning recess under the spring force, elastically holding the transmission head 9 in the extended position. When the transmission head 9 slides axially to the retracted position, the steel ball falls into the second positioning recess, elastically holding the transmission head 9 in the retracted position. The operator needs to apply a certain pushing or pulling force axially to overcome the elastic holding force between the steel ball and the positioning recess in order to switch the transmission head 9 from one position to another. This dual-positioning structure effectively prevents the transmission head 9 from accidentally slipping out during transportation and carrying. The installation positions of the sliding groove and the elastic positioning bead are interchangeable; that is, the sliding groove is opened on the inner circumferential surface of the sliding sleeve 8, and the elastic positioning bead is installed on the outer circumferential surface of the transmission head 9.

[0093] In some embodiments of this example, the opening and closing device further includes a position sensor for detecting whether the drive head 9 is in the extended or retracted position.

[0094] like Figure 16 and Figure 17 As shown, the position sensor includes a first magnet 91, a second magnet 92, a first Hall sensor 81, and a second Hall sensor 82. The first magnet 91 and the second magnet 92 are axially spaced and embedded on the outer surface of the transmission head 9. The first Hall sensor 81 and the second Hall sensor 82 are axially spaced on the inner wall of the sliding sleeve. The first magnet 91 is located above the second magnet 92, and the first Hall sensor 81 is located above the second Hall sensor 82. Both the first Hall sensor 81 and the second Hall sensor 82 are electrically connected to the controller. Figure 16As shown, when the drive head is in the retracted position, the second magnet 92 and the first Hall sensor 81 are radially aligned, and the first Hall sensor 81 outputs a retraction signal; as Figure 17 As shown, when the drive head is in the extended position, the first magnet 91 and the second Hall sensor 82 are aligned radially, and the second Hall sensor 82 outputs an extended signal.

[0095] In some embodiments of this example, the opening and closing device further includes a locking key, which is wirelessly connected to the controller 11. The locking key is used to receive authorization instructions issued by the backend platform and to perform locking or unlocking operations.

[0096] The key housing of the locking key integrates a microprocessor, non-volatile memory, a wireless communication module, a battery, and a drive interface for the lock 12. The locking key establishes a point-to-point wireless pairing connection with the controller 11 via the wireless communication module. Communication between the two uses encrypted transmission to ensure the security of operating commands. The wireless communication module is preferably a Bluetooth module, Wi-Fi module, ZigBee module, NFC module, or other wireless transceiver module using a dedicated short-range wireless communication protocol.

[0097] During the preparation phase, the locking key and controller 11 receive authorization commands from the backend management platform wirelessly. The authorization commands specify the range of valves the locking key is authorized to lock or unlock (defined by a list of valve numbers or work order numbers) and the authorized time window. Upon receiving the lock or unlock command, the locking key sends a drive signal to the electronic lock installed at the keyhole of the enclosure 7 via its lock drive interface 12, controlling the electronic lock to perform the locking or unlocking action, such as... Figure 7 and Figure 8 As shown. The electronic lock is a type of lock 12, referring to a lock 12 that is controlled by electrical signals to lock and release, such as an electronic padlock.

[0098] In some embodiments of this example, the handle is a long strip structure or a circular handwheel structure.

[0099] When the handle is a long strip structure, the handle 10 can be telescopic. Specifically, by adjusting the telescopic length of the handle 10, the operator can flexibly adjust it according to the size of the operating space and the required lever arm length, thereby improving operating comfort and versatility.

[0100] In some embodiments of this example, the handle 10 and the sliding sleeve 8 are connected by a threaded connection or a snap-fit ​​connection.

[0101] The second aspect of this embodiment discloses an operating method for a manual valve opening and closing device, applied to the opening and closing device described in the first aspect of this embodiment. For example... Figure 18As shown, the operation method includes steps S100 to S700.

[0102] Step S100. The controller 11 completes its self-test and establishes a wireless connection between the controller 11 and the locking key.

[0103] In some embodiments of this example, step S100 further includes: the controller 11 collects the fingerprint information of the operator, compares the collected fingerprint information with the pre-stored fingerprint template, and allows subsequent steps to be executed only after the comparison is successful.

[0104] Specifically, after completing the physical and electrical connections of the opening and closing device and powering on, the controller 11 automatically completes a self-test. After the self-test passes, the controller 11 searches for nearby locking keys in a pairing state, establishes a wireless connection, and performs two-way authentication. After the wireless connection is established, the controller 11 collects the operator's fingerprint information and compares the collected fingerprint information with a pre-stored fingerprint template. Only after the comparison is successful can subsequent steps be executed.

[0105] Step S200. The RFID tag of the valve is read by the RFID reader. The controller 11 matches the read information with the equipment information in the received electronic work order. After the match is successful, the controller 11 retrieves the calibration parameters.

[0106] Specifically, the lower end of the sliding sleeve 8 is brought close to the RFID tag on the sealing device, and the RFID reader reads the encoded information stored in the tag. The controller 11 compares the read equipment code with the manual valve information in the received electronic work order. The comparison includes equipment code consistency, validity of the operation time, and whether the opening and closing requirements are consistent with the current operation. If the match is successful, the controller 11 retrieves the calibration parameters corresponding to the valve from the electronic work order. The calibration parameters include the calibration number of revolutions and the calibration torque. If the match fails, the controller 11 issues an alarm and prohibits subsequent operations. The operator must verify the manual valve identification and confirm that the work order is correct before re-verifying the RFID.

[0107] Step S300. Move the lever 74 to open the sealing device 7, exposing the transmission tooth groove. Press down the transmission head 9 to make the transmission teeth engage with the transmission tooth groove. Rotate the handle 10 to the fully open position of the valve. The controller 11 records the zero position reference and clears the data of the rotation sensor to zero.

[0108] Specifically, first unlock the sealing device 7, then move the lever 74 in the second direction. The drive disc 73 rotates, causing the fan-shaped sealing petals 72 to unfold outwards, releasing the central ring and exposing the transmission tooth groove. Next, align the lower end of the sliding sleeve 8 with the upper part of the transmission block 6, and press down the transmission head 9 to make the transmission teeth engage with the transmission tooth groove. Then, rotate the handle 10 in the opening direction to operate the valve from the current uncertain position to the fully open position. The controller 11 records the current rotation position as the zero-position reference, and at the same time resets the rotation count sensor to zero.

[0109] Step S400. Rotate the handle 10 to perform valve opening and closing operations. During the operation, the controller 11 collects the number of rotations and torque data in real time and compares them with the pre-stored calibration curve. An alarm is issued when there is an abnormality.

[0110] Specifically, according to the operation requirements, the handle 10 is rotated, and the controller 11 compares the real-time collected rotation number and torque data with the pre-stored calibration curve. If the deviation between the real-time torque value and the reference torque value of the calibration curve at the same rotation position exceeds a preset threshold, or if the torque change rate exceeds a preset change rate threshold, the controller 11 determines that the operation is abnormal, immediately issues an alarm and prompts the operator to stop the operation. The operator must check for abnormalities such as jamming or foreign objects before continuing the operation.

[0111] In some embodiments of this example, the sampling frequency of the controller 11 for acquiring revolution count data and torque data is greater than or equal to 4Hz.

[0112] Step S500. When the number of revolutions data enters the calibration tolerance range, the controller 11 switches to the torque priority judgment mode. When the torque data reaches the calibration torque and remains stable for a preset time, the operation is determined to be in place, and a digital operation certificate is generated.

[0113] Specifically, when the real-time lap count enters the tolerance range of the calibrated lap count, the controller 11 automatically switches to torque-priority judgment mode. When the real-time torque value reaches the calibrated torque and remains stable for the preset duration, the controller 11 determines that the operation is complete and automatically generates a digital operation certificate.

[0114] In some implementations of this embodiment, the preset duration is 3 seconds.

[0115] Step S600. Lift the transmission head 9 to disengage the transmission teeth from the transmission tooth groove, then move the lever 74 to close the sealing device 7, blocking the transmission tooth groove and exposing the lock hole.

[0116] Specifically, the operator lifts the transmission head 9, causing the transmission teeth to disengage from the transmission tooth groove and be stored in the sliding sleeve 8. Then, the operator moves the lever 74 in the first direction, causing the fan-shaped closing petals 72 to retract inward, tightening the central ring, and blocking the transmission tooth groove.

[0117] Step S700. Activate the locking key with a digital operating credential via controller 11 to lock the sealing device 7.

[0118] Specifically, the lock key is activated by a digital credential, and authorized personnel immediately lock the door.

[0119] In some embodiments of this example, during the locking process, the RFID tag is continuously read by the RFID antenna coil at the lower end of the sliding sleeve 8 to monitor whether the rotation count remains unchanged. A position sensor is used to monitor whether the transmission head is in the retracted position to confirm that the sliding sleeve has not disengaged from the operating position before locking is complete. The operating position refers to the position where the lower end of the sliding sleeve covers the sealing device and the RFID antenna coil is within the effective reading range. With the sliding sleeve in its original position, the rotation count unchanged, and the transmission head in the retracted position, the toggle block 74 is rotated to close the sealing device and expose the lock hole to perform locking. After locking, the handle is removed to ensure that the transmission tooth groove is not exposed to other tools during operation, completing the closed-loop operation. In some embodiments of this example, the electronic work order is issued from the backend platform to the controller 11 and the locking key. The electronic work order includes manual valve information, opening and closing requirements, operation time fields, and the calibration rotation count and calibration torque determined based on the manual valve information.

[0120] The electronic work order is generated as follows: the work supervisor imports the electronic work order through the backend platform. The backend platform determines the corresponding calibration number of turns and calibration torque based on the manual valve information and writes them into the electronic work order. After approval at each level, the electronic work order is issued to the controller 11 and locking key of the corresponding work team.

[0121] The hierarchical approval process employs a three-tiered approval workflow, proceeding sequentially through the work team, workshop, and dispatcher. The approval engine records the entire process. Upon approval, the electronic work order is simultaneously sent to the controller 11 and the locking key via 4G / 5G or Wi-Fi remote communication.

[0122] In some embodiments of this example, the operation method further includes: after step S700, the controller 11 uploads the digital operation certificate to the backend platform for archiving, and the backend platform records the status of the lock 12 to form a full-link operation traceability file.

[0123] In some embodiments of this example, the operation method further includes: after step S700, the backend platform performs data analysis on the uploaded torque curve, and generates an early warning prompt when it detects that the torque curve deviates from the historical normal range.

[0124] In some embodiments of this example, the operation method further includes an unlocking and archiving step: after confirming that all work is completed and personnel and tools have been removed, the person in charge of the work initiates a tag removal / unlocking application through the backend platform. After approval, the system sends a tag removal / unlocking instruction to the locking key. Authorized personnel perform tag removal / unlocking after on-site fingerprint authentication, restore the manual valve operation state, return the transmission handle 10 and controller 11 to the equipment management point, and synchronize the operation data to the backend platform.

[0125] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A manual valve opening and closing device, characterized in that, include: The transmission cylinder has a three-section stepped inner hole, consisting of an upper inner hole, a middle inner hole, and a lower inner hole, arranged from top to bottom. The lower inner hole is a polygonal hole that matches the outer circumferential shape of the drive nut, so that the transmission cylinder is circumferentially fixed to the drive nut when it is sleeved on the drive nut. The diameter of the middle inner hole is larger than the outer diameter of the fixing nut on the valve stem, and is used to accommodate the fixing nut when the transmission cylinder is sleeved on the drive nut. A transmission block has a through hole extending axially through its center, and a transmission tooth groove is provided around the through hole on the upper end face of the transmission block; the transmission block is embedded and fixed in the upper section of the inner hole of the transmission cylinder, and the through hole is used for the valve stem to pass through. A sealing device is provided above the transmission block; the sealing device includes a movable blocking part and a toggle block that are linked together. When the toggle block is toggled in a first direction, the movable blocking part moves to above the transmission tooth groove to block the transmission tooth groove. When the toggle block is toggled in a second direction opposite to the first direction, the movable blocking part moves away from above the transmission tooth groove to expose the transmission tooth groove. An RFID tag is provided on the outside of the movable blocking part. A sliding sleeve, the lower end of which is provided with an RFID antenna coil; A transmission head, the lower end of which is provided with transmission teeth that are adapted to the transmission tooth groove, the transmission head is slidably disposed in the sliding sleeve along the axial direction; the transmission head has an extended position and a retracted position, in the extended position the transmission teeth protrude from the lower end face of the sliding sleeve, in the retracted position the transmission teeth are housed in the sliding sleeve. A handle, wherein the handle is detachably connected to a sliding sleeve; The opening and closing device also includes a controller, a rotation count sensor, an RFID reader, and a torque sensor. The torque sensor is disposed on the torque transmission path. The controller is electrically connected to the rotation count sensor, the torque sensor, and the RFID reader, respectively. The RFID reader is electrically connected to the RFID antenna coil.

2. The manual valve opening and closing device according to claim 1, characterized in that, The movable shielding part includes a fixed plate, a drive disk, and multiple fan-shaped closed petals. The fixed plate and the drive disk are both plates with a circular central hole. The fixed plate and the drive disk are spaced apart from bottom to top. The multiple fan-shaped closed petals are sandwiched between the fixed plate and the drive disk and surround to form an openable and closable central ring. The transmission tooth groove is located below the central ring. The toggle block is located on the edge of the drive disk. The RFID tag is located on the edge of the drive disk.

3. The manual valve opening and closing device according to claim 2, characterized in that, The fixed plate is provided with an arc-shaped guide groove, one end of which faces the circular central hole and the other end extends outward; the drive plate is provided with a straight sliding groove, which is a straight groove that deviates from the circular central hole; the fan-shaped closing petal is provided with a cylinder extending downward into the arc-shaped guide groove and a slider extending upward into the straight sliding groove; when the drive plate rotates, it drives the fan-shaped closing petal through the straight sliding groove and the slider, and causes the cylinder to slide along the arc-shaped guide groove, so as to tighten or loosen the central ring.

4. The manual valve opening and closing device according to claim 2, characterized in that, The opening and closing device also includes a housing and a top cover, which together form a cavity. The transmission cylinder and the sealing device are located inside the cavity, and the lever extends out of the cavity. Locking holes are correspondingly provided on the housing, the drive plate, and the fixing plate. When the central ring is tightened, the locking holes on the housing, the drive plate, and the fixing plate are aligned, allowing the lock to pass through and restrict the rotation of the drive plate.

5. The manual valve opening and closing device according to claim 1, characterized in that, An axial anti-rotation fit structure is provided between the outer peripheral surface of the transmission head and the inner peripheral surface of the sliding sleeve. One of the outer peripheral surface of the transmission head and the inner peripheral surface of the sliding sleeve is provided with an axially extending sliding groove, and the other is provided with an elastic positioning bead. The bead body of the elastic positioning bead cooperates with two positioning recesses in the sliding groove corresponding to the extended position and the retracted position, so as to position the transmission head in the extended position or the retracted position.

6. The manual valve opening and closing device according to claim 1, characterized in that, The opening and closing device also includes a locking key, which is wirelessly connected to the controller. The locking key is used to receive authorization instructions issued by the backend platform and to perform locking or unlocking operations.

7. The manual valve opening and closing device according to claim 1, characterized in that, The handle is a long strip structure or a round handwheel structure, and the handle and the sliding sleeve are connected by a thread or a snap-fit ​​connection.

8. A method for operating a manual valve opening and closing device, applicable to the opening and closing device as described in any one of claims 1-7, characterized in that, The operation method includes: The controller performs its self-test and establishes a wireless connection between the controller and the locking key; The RFID reader reads the RFID tag on the valve, and the controller matches the read information with the equipment information in the received electronic work order. Once the match is successful, the controller retrieves the calibration parameters. Move the lever to open the sealing device, exposing the transmission tooth groove. Press down the transmission head to make the transmission teeth engage with the transmission tooth groove. Rotate the handle to the fully open position of the valve. The controller records the zero-position reference and clears the data of the rotation sensor to zero. Rotating the handle performs valve opening and closing operations. During the operation, the controller collects the number of rotations and torque data in real time and compares them with the pre-stored calibration curve. An alarm is issued when there is an abnormality. Once the number of revolutions enters the calibration tolerance range, the controller switches to torque priority judgment mode. When the torque data reaches the calibration torque and remains stable for a preset duration, the operation is determined to be in place, and a digital operation certificate is generated. Lift the transmission head to disengage the transmission teeth from the transmission tooth groove, then move the lever to close the sealing device and block the transmission tooth groove. The locking device is activated by the controller using a digital operating credential to activate the locking key.

9. The operating method of the manual valve opening and closing device according to claim 8, characterized in that, During the locking process, the RFID tag is continuously read through the RFID antenna coil at the lower end of the sliding sleeve, and the number of rotations is monitored to ensure that the sliding sleeve does not leave the operating position before the locking is completed.

10. The operating method of the manual valve opening and closing device according to claim 8, characterized in that, The electronic work order is issued from the backend platform to the controller and the locking key. The electronic work order includes manual valve information, opening and closing requirements, operation time field, and calibration number of turns and calibration torque determined based on the manual valve information.

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