Pot cover locking device for cauldron

Abstract

The utility model discloses a pot cover locking device for a cauldron, which comprises a plurality of lock hook components which are arranged on the edge of the pot cover at equal angles by taking the center of the pot cover as a circle center, are controlled by pull wires and can lock the pot cover and the edge of the cauldron, a centralized control assembly for controlling all the lock hook assemblies to act synchronously through a pull wire is arranged in the center of the cooker cover, each lock hook assembly comprises a hook seat fixed to the cooker cover, a guide sleeve is arranged on each hook seat, a sliding rod capable of sliding in a sliding sleeve in the radius direction of the cooker cover is arranged in each guide sleeve, and a lock hook is arranged on each lock hook assembly. The end, close to the edge of the pot cover, of the sliding rod is provided with a locking hook matched with the edge of the pot, and the end, away from the edge of the pot cover, of the sliding rod is connected with a pull wire connected with the centralized control assembly. The pot cover locking device for the cauldron can perform centralized control on a plurality of lock hook assemblies distributed on the edge of the pot cover, can meet the matched use requirements of the large-caliber pot cover, and has the advantages of simple structure, low production cost, convenience in use and the like.

Description

Technical Field

[0001] The utility model relates to a kitchen appliance, in particular to a lid locking device for a large earthen stove pot, which is used to lock the lid and the large pot during the steaming process of the large earthen stove pot. Background Art

[0002] During the steaming process using a large earthen stove pot, the steam in the pot will overflow through the gap between the lid and the large pot and diffuse in the kitchen space. To solve this problem, CN 204318488 U discloses a large pot steam collection device. The large pot steam collection device includes an interlayer adapter ring arranged between the pot body and the lid. The edge of the lid is hermetically connected to the pot rim through the interlayer adapter ring to form a pot cavity. An annular sealing groove matching with the sealing vertical edge of the lid is arranged on the upper end surface of the interlayer adapter ring. The upper part of the interlayer adapter ring is separated into an inner pot interlayer ring and an outer pot interlayer ring by the annular sealing groove. The lower interlayers of the inner pot interlayer ring and the outer pot interlayer ring are interconnected. A plurality of steam inlet openings for allowing the steam in the pot cavity to enter the interlayer are opened on the inner pot interlayer ring. A steam centralized discharge pipe for discharging the steam in the interlayer out of the interlayer is connected to the outer pot interlayer ring. The large pot steam collection device has a simple structure, can realize the sealing between the lid and the pot mouth without a sealing rubber ring, the sealing structure is high-temperature resistant, has a good sealing effect, a high steam collection rate, and is safe and non-toxic in use. However, this large pot steam collection device has a complex structure, a high production cost, and poor market competitiveness. CN 210748834 U discloses a large pot steam guide and discharge device, which adopts the method of arranging a steam guide pipe installation hole on the lid body, so that the large pot steam guide and discharge device has a simple structure, is convenient to install, has a low production cost, and has strong market competitiveness. However, during the use of the foregoing two products, when the water in the pot boils violently, it is easy to lift the lid, causing steam to overflow and affecting the use effect. Although expanding the steam inlet opening can solve the problem of the lid being lifted, it will also cause disadvantages such as a slow heating rate in the pot, poor heat preservation effect, and long steaming time for food. To overcome the foregoing disadvantages, CN 221844495 U and CN 221813737 U disclose two sealing mechanisms (equivalent to an interlayer adapter ring or a sealing pot ring) of a steam-free lid device and a steam-free lid device, which use a torsion spring or a buckle in the second connection mechanism to lock the lid and the sealing mechanism to prevent steam from overflowing during violent boiling. However, the second connection mechanisms in these two steam-free lid devices are arranged at equal angular intervals on the lid edge with the center of the lid as the center of the circle. During use, it is necessary to lock or unlock each second connection mechanism one by one, and the operation is cumbersome. Especially when this steam-free lid device is applied to a large-diameter large pot, the operator needs to walk around the stove to complete the operation of the second connection mechanism at the far end, and the use is extremely inconvenient. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a locking device for a large pot lid, which can centrally control a plurality of hook assemblies distributed on the edge of the pot lid, meet the supporting use requirements of a large-diameter pot lid, and has the advantages of simple structure, low production cost, and convenient use.

[0004] The technical solution for solving the technical problem: A locking device for a large pot lid includes a plurality of hook assemblies that are installed at equal angular intervals on the edge of the pot lid with the center of the pot lid as the center of the circle and are controlled by a wire rope to lock the pot lid and the edge of the large pot. A centralized control assembly for controlling all hook assemblies to move synchronously through the wire rope is provided at the center position of the pot lid. The hook assembly includes a hook seat fixed on the pot lid, a guide sleeve is provided on the hook seat, and a sliding rod that can slide along the radius direction of the pot lid in the sliding sleeve is installed in the guide sleeve. A locking hook that cooperates with the edge of the large pot is installed at one end of the sliding rod close to the edge of the pot lid, and a wire rope connected to the centralized control assembly is connected to the other end of the sliding rod far from the edge of the pot lid.

[0005] As a further improvement of the utility model: A locking hook return spring that pushes the sliding rod and the locking hook away from the edge of the large pot to release the locking state between the pot lid and the edge of the large pot is also installed on the hook seat.

[0006] As a further improvement of the utility model: A hook installation sleeve perpendicular to the sliding rod is provided at one end of the sliding rod connected to the locking hook, and the locking hook is connected to the sliding rod through the hook installation sleeve.

[0007] As a further improvement of the utility model: The centralized control assembly is a lifting type centralized control assembly. The lifting type centralized control assembly includes a control base installed at the center position of the pot lid, and an automatic spring latch is fixed on the control base. The automatic spring latch includes a latch seat and a latch rod. An unlocking button is provided on the latch seat. The latch rod is perpendicular to the center plane of the pot lid, and a lifting cross beam for lifting the latch rod upward is provided on the latch rod. Each wire rope converges and is connected to the lower end of the latch rod of the automatic spring latch.

[0008] As a further improvement of the utility model: A central hole is opened at the center position of the control base, and wire rope bending conduits corresponding to the number and orientation of the hook assemblies are installed in the central hole. Each wire rope starts from the sliding rod of the corresponding hook assembly, passes through the wire rope bending conduit to change the direction, and then is connected to the lower end of the latch rod.

[0009] As a further improvement of the utility model: A palm rest for supporting the palm is provided at the upper end of the control base, and a telescopic accommodation cavity for the upper end of the latch rod is provided in the palm rest.

[0010] As a further improvement of the present utility model: the centralized control assembly is a pull-type centralized control assembly. The pull-type centralized control assembly includes a control base installed at the center position of the pot lid. At the center position of the control base, there is a vertical guide post coaxial with the pot lid. A sliding sleeve is sleeved on the vertical guide post. A lifting handle is installed on the sliding sleeve. A gantry handle is also provided on the control base. The gantry handle includes two support columns symmetrically arranged in the diameter direction of the vertical guide post and a cross beam connecting the upper ends of the two support columns. A locking device is provided between the lifting handle and the gantry handle to lock the lifting handle at a designated position. Steering fixed pulleys corresponding to the number and orientation of the stay wires are also provided on the control base. Each stay wire starts from the sliding rod of the corresponding hook assembly, changes direction through the steering fixed pulley, and then is connected to the sliding sleeve.

[0011] As a further improvement of the present utility model: the centralized control assembly is a press-type centralized control assembly. The press-type centralized control assembly includes a control base installed at the center position of the pot lid. At the center position of the control base, there is a vertical guide post coaxial with the pot lid. A sliding sleeve is sleeved on the vertical guide post. Above the sliding sleeve, there is a pressing beam that slides synchronously with the sliding sleeve. A bouncing core assembly is installed between the upper end of the vertical guide post and the pressing beam. A compression spring that pushes the sliding sleeve upward is sleeved on the vertical guide post below the sliding sleeve. Steering fixed pulleys corresponding to the number and orientation of the stay wires are also provided on the control base. Each stay wire starts from the sliding rod of the corresponding hook assembly, changes direction through the steering fixed pulley, and then is connected to the sliding sleeve.

[0012] As a further improvement of the present utility model: the centralized control assembly is a screwing-type centralized control assembly. The screwing-type centralized control assembly includes a control base installed at the center position of the pot lid. At the center position of the control base, there is a vertical shaft coaxial with the pot lid. A winch that can rotate on the vertical shaft is installed on the vertical shaft. Above the winch, a winch screwing sleeve barrel that can rotate and slide up and down on the vertical shaft is also installed on the vertical shaft. A clutch plug is provided at the lower end of the winch screwing sleeve barrel. A clutch socket that cooperates with the clutch plug is provided on the winch. Ratchet teeth are provided on the shaft body of the vertical shaft. A spring pawl that cooperates with the ratchet teeth is installed on the winch screwing sleeve barrel. The axial width of the engagement between the spring pawl and the ratchet teeth is greater than the clutch stroke between the clutch plug and the clutch socket. Steering fixed pulleys corresponding to the number and orientation of the stay wires are also provided on the control base. Each stay wire starts from the sliding rod of the corresponding hook assembly, changes direction through the steering fixed pulley, and then is connected to the winch.

[0013] As a further improvement of the present utility model: a limit post and a limit retaining piece that cooperate with the center hole at the bottom of the winch screwing sleeve barrel to prevent the winch screwing sleeve barrel from falling off are installed at the upper end of the vertical shaft. A rotating handwheel for driving the winch screwing sleeve barrel to rotate is provided at the upper end of the winch screwing sleeve barrel.

[0014] Beneficial effects: The pot lid locking device for large pots of the present utility model, due to the technical solution that the pot lid locking device for large pots includes a plurality of hook assemblies controlled by wire ropes and equally angularly installed on the edge of the pot lid with the center of the pot lid as the center of the circle, which can lock the pot lid and the edge of the large pot, and a centralized control assembly for controlling the synchronous movement of all hook assemblies through wire ropes is provided at the center position of the pot lid. During use, the centralized control assembly controls a plurality of hook assemblies distributed on the edge of the pot lid through wire ropes, realizing centralized control of the hook assemblies, overcoming the drawback in the prior art that each hook assembly needs to be locked or unlocked one by one. When the pot lid locking device for large pots of the present utility model is used for large-diameter pot lids, it can be locked with one key without walking around the stove, and has the advantages of simple structure, low manufacturing cost, and convenient use. Due to the technical feature that a locking hook return spring for pushing the sliding rod and the locking hook away from the edge of the large pot and releasing the locking state between the pot lid and the edge of the large pot is also installed on the hook seat, unlocking is more convenient and rapid unlocking is achieved. Due to the technical feature that a hook installation sleeve perpendicular to the sliding rod is provided at one end of the sliding rod where it is connected to the locking hook, and the locking hook is connected to the sliding rod through the hook installation sleeve, the front end of the locking hook can naturally droop, making it easier to catch the edge of the large pot, and the locking hook has a certain degree of freedom, with better adaptability when matching with the edge of the large pot, and the locking effect between the pot lid and the large pot is better. Due to the technical feature that the centralized control assembly is a lifting type centralized control assembly, the lifting type centralized control assembly includes a control base installed at the center position of the pot lid, an automatic spring latch is fixed on the control base, the automatic spring latch includes a latch seat and a latch rod, an unlocking button is provided on the latch seat, the latch rod is perpendicular to the center plane of the pot lid, a lifting cross beam for lifting the latch rod upward is provided on the latch rod, and each wire rope converges and is connected to the lower end of the latch rod of the automatic spring latch. This makes it possible to simply modify a commercially available automatic spring latch so that its lower end of the latch rod can be connected to the wire rope and be used as a part of the present utility model, further reducing the production cost and optimizing the structure. Due to the technical feature that a central hole is opened at the center position of the control base, a wire rope bending conduit corresponding to the number and orientation of the hook assemblies is installed in the central hole, and each wire rope starts from the sliding rod of the corresponding hook assembly, passes through the wire rope bending conduit to change the direction, and then is connected to the lower end of the latch rod. By restricting the direction of the wire rope, the stroke of the latch rod can be effectively shortened, making the height of the centralized control assembly lower, more convenient to use, and preventing the wire rope from breaking or the control base from being damaged due to long-term friction between the wire rope and the control base. Due to the technical feature that a palm support for supporting the palm is provided at the upper end of the control base, and a telescopic accommodation cavity for the upper end of the latch rod is provided in the palm support, when locking, the palm is placed on the palm support, and the lifting cross beam is lifted with the index finger and middle finger, which is more in line with ergonomics and easier to operate.Due to the technical features that the centralized control component includes a control base installed at the center position of the pot lid, a vertical guiding column coaxial with the pot lid is provided at the center position of the control base, a sliding sleeve is sleeved on the vertical guiding column, a lifting handle is installed on the sliding sleeve, a gantry handle is further provided on the control base, the gantry handle includes two supporting columns symmetrically arranged in the diameter direction of the vertical guiding column and a cross beam connecting the upper ends of the two supporting columns, a locking device capable of locking the lifting handle at a specified position is provided between the lifting handle and the gantry handle, and steering fixed pulleys corresponding to the number and orientation of the stay wires are further provided on the control base, and each stay wire starts from the sliding rod of the corresponding hook assembly, changes direction through the steering fixed pulley and then is connected to the sliding sleeve, the stroke of lifting the cross beam can be longer, and the resistance during lifting is smaller, which can meet the supporting needs of large-diameter pots. Due to the technical solution that the centralized control component is a pressing type centralized control component, one-time pressing for locking and again pressing for unlocking are realized, and the operation is more convenient. Due to the technical features that the centralized control component is a screwing type centralized control component, it is more convenient to grasp the locking force during the locking operation, and the drawback that the stay wire is stretched after long-term use and affects the locking effect can be overcome. Due to the technical features that a limiting post and a limiting retaining piece for preventing the screwing and rotating sleeve barrel from falling off are installed at the upper end of the vertical axis and are matched with the central hole at the bottom of the screwing and rotating sleeve barrel, and a rotating hand wheel for driving the screwing and rotating sleeve barrel to rotate is provided at the upper end of the screwing and rotating sleeve barrel, the screwing operation is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following further elaborates on the pot lid locking device for large pots of the present invention in conjunction with the drawings.

[0016] Figure 1 is a schematic diagram of the use state of the pot lid locking device for large pots of the present invention;

[0017] Figure 2 is an enlarged structural schematic diagram of the lifting type centralized control component in the pot lid locking device for large pots of the present invention;

[0018] Figure 3 is an enlarged structural schematic diagram of another implementation manner of the lifting type centralized control component in the pot lid locking device for large pots of the present invention;

[0019] Figure 4 is an enlarged structural schematic diagram of the pressing type centralized control component in the pot lid locking device for large pots of the present invention;

[0020] Figure 5 is a schematic diagram of the use state of the pot lid locking device for large pots of the present invention when using the screwing type centralized control component;

[0021] Figure 6 is Figure 5 an enlarged exploded structural diagram of the screwing type centralized control component in Detailed implementation mode

[0022] As Figure 1 shown, the locking device for the large pot lid of the present utility model includes a plurality of hook assemblies 4 controlled by a wire rope and capable of locking the pot lid and the edge of the large pot, which are installed at equal angular intervals on the edge of the pot lid with the center of the pot lid as the center of the circle. A centralized control assembly 5 for controlling the synchronous movement of all hook assemblies through a wire rope is provided at the center position of the pot lid. The hook assembly includes a hook seat 41 fixed on the pot lid, and the hook seat is fixed on the pot lid by screws or rivets. A guide sleeve 42 is provided on the hook seat, and a sliding rod 43 capable of sliding along the radius direction of the pot lid in the sliding sleeve is installed in the guide sleeve. A locking hook 45 cooperating with the edge of the large pot is installed at one end of the sliding rod close to the edge of the pot lid. A wire rope 3 connected to the centralized control assembly is connected to the other end of the sliding rod far from the edge of the pot lid. A locking hook return spring 46 for pushing the sliding rod and the locking hook away from the edge of the large pot and releasing the locking state between the pot lid and the edge of the large pot is also installed on the hook seat. A pin or a retaining piece cooperating with the locking hook return spring is provided on the sliding rod. A hook mounting sleeve 44 perpendicular to the sliding rod is provided at one end of the sliding rod connected to the locking hook, and the locking hook is connected to the sliding rod through the hook mounting sleeve.

[0023] As Figure 2 shown, the centralized control assembly is a lifting type centralized control assembly. The lifting type centralized control assembly includes a control base 50 installed at the center position of the pot lid, and the control base is fixed at the center of the pot lid by screws or rivets. An automatic spring bolt is fixed on the control base. The automatic spring bolt includes a pin seat 55 and a pin rod 53. An unlocking button 52 is provided on the pin seat. The pin rod is perpendicular to the central plane of the pot lid. A lifting cross beam 54 for lifting the pin rod upward is provided on the pin rod, and the lifting cross beam is perpendicular to the pin rod. Each wire rope converges and is connected to the lower end of the pin rod of the automatic spring bolt. The automatic spring bolt in this embodiment can be directly purchased from the market, and by drilling and transforming the lower end of the pin rod, the lower end of the pin rod can be connected to the wire rope.

[0024] Preferably, a central hole is opened at the center position of the control base, and a wire rope bending conduit 56 corresponding to the number and orientation of the hook assemblies is installed in the central hole. Each wire rope starts from the sliding rod of the corresponding hook assembly, passes through the wire rope bending conduit to change the direction, and then is connected to the lower end of the pin rod.

[0025] Preferably, a palm rest 51 for supporting the palm is provided at the upper end of the control base, and a telescopic accommodation cavity for the upper end head of the pin rod is provided in the palm rest.

[0026] During the locking operation, place the palm on the palm rest, use the index finger and middle finger to lift the upper crossbeam. Through the pin rod, lift the pull wire. When the pin rod moves to the locking position, it will automatically lock. At this time, the locking hook will lock the edge of the large pot and the pot lid. When unlocking, press the unlocking button on the pin seat. The pin rod will automatically pop down under the action of the spring, and the pull wire will relax. Under the action of the reset spring of the locking hook, the locking hook will move away from the center of the pot lid, releasing the locking of the large pot and the pot lid.

[0027] As Figure 3 shown, another implementation of the lifting type centralized control component. The lifting type centralized control component includes a control base 60 installed at the center position of the pot lid. At the center position of the control base, there is a vertical guide post 61 coaxial with the pot lid. A sliding sleeve 62 is sleeved on the vertical guide post. A lifting handle 63 is installed on the sliding sleeve. A gantry handle is also provided on the control base. The gantry handle includes two support columns 65 symmetrically arranged in the diameter direction of the vertical guide post and a crossbeam 69 connecting the upper ends of the two support columns. A locking device is provided between the lifting handle and the gantry handle, which can lock the lifting handle at a specified position. The locking device includes a hook 67 and a spring 66 installed on the gantry handle and a stud 68 installed on the lifting handle and cooperating with the hook. When lifting the lifting handle, the stud pushes open the hook. After releasing the lifting handle, the hook pulls the stud to prevent the lifting handle from descending. When unlocking is required, press the upper end of the hook to make the hook rotate around the hook shaft, releasing the limit on the stud, and the lifting handle slides down to complete the unlocking.

[0028] Steering fixed pulleys 64 corresponding to the number and orientation of the pull wires are also provided on the control base. Each pull wire starts from the slide bar of the corresponding locking hook assembly, changes direction through the steering fixed pulley, and is connected to the sliding sleeve.

[0029] As Figure 4 shown, the centralized control component is a pressing type centralized control component. The pressing type centralized control component includes a control base 70 installed at the center position of the pot lid. At the center position of the control base, there is a vertical guide post 71 coaxial with the pot lid. A sliding sleeve 72 is sleeved on the vertical guide post. A pressing beam 76 that slides synchronously with the sliding sleeve is provided on the sliding sleeve. A bouncing core assembly 75 is installed between the upper end of the vertical guide post and the pressing beam. A compression spring 73 that pushes the sliding sleeve upward is sleeved on the vertical guide post below the sliding sleeve. Steering fixed pulleys 74 corresponding to the number and orientation of the pull wires are also provided on the control base. Each pull wire starts from the slide bar of the corresponding locking hook assembly, changes direction through the steering fixed pulley, and is connected to the sliding sleeve. The bouncing core assembly in this embodiment can use the bouncing core assembly in a market-purchased washbasin drainer.

[0030] As Figure 5 、 Figure 6As shown, the centralized control assembly is a screw-type centralized control assembly 8, which includes a control base 80 installed at the center of the pot cover, a vertical shaft 81 coaxial with the pot cover is provided at the center of the control base, a capstan 82 that can rotate on the vertical shaft is provided on the vertical shaft, a capstan screwing barrel 83 that can rotate and slide up and down on the vertical shaft is also provided on the vertical shaft above the capstan, a clutch plug 832 is provided at the lower end of the capstan screwing barrel, a clutch socket 821 that cooperates with the clutch plug is provided on the capstan, ratchet teeth 811 are provided on the shaft body of the vertical shaft, a spring ratchet 833 that cooperates with the ratchet teeth is provided on the capstan screwing barrel, the axial width of the spring ratchet meshing with the ratchet teeth is greater than the clutch stroke between the clutch plug and the clutch socket, and a steering fixed pulley 84 corresponding to the number and orientation of the pull wires is also provided on the control base, and each pull wire starts from the sliding rod of the corresponding lock hook assembly and changes direction through the steering fixed pulley and is connected to the capstan.

[0031] Preferably, a limit column and a limit baffle 812 are installed at the upper end of the vertical axis to cooperate with the center hole 831 at the bottom of the capstan barrel to prevent the capstan barrel from falling off, and a rotating handwheel 85 is provided at the upper end of the capstan barrel to drive the capstan barrel to rotate.

[0032] When in use, press down and rotate the capstan twisting barrel to insert the clutch plug at the lower end of the capstan twisting barrel into the clutch socket of the capstan. When the capstan twisting barrel continues to be rotated, the capstan and the capstan twisting barrel rotate synchronously, so that the pull line is wound around the capstan to pull the pull line. When the capstan twisting barrel stops twisting, the locking hook will not be unlocked under the action of the ratchet teeth and the spring pawl. When unlocking is required, lift the capstan twisting barrel to pull the clutch plug at the lower end of the capstan twisting barrel out of the clutch socket of the capstan to release the restriction on the capstan. Under the action of the locking hook reset spring in the locking hook assembly, the capstan rotates in the opposite direction to release the pull line, and the locking hook moves in the opposite direction to release the lock on the edge of the cauldron and the lid.

[0033] When the pot cover locking device of the utility model is used to lock the pot and the pot cover, it is necessary to set a steam exhaust hole on the pot cover, and connect the steam exhaust hole to the steam exhaust pipe. The pot cover locking device of the utility model can also be used for steam-free cookware with a sealing pot ring or a switching pot ring, and the steam exhaust hole and the steam exhaust pipe on the sealing pot ring or the switching pot ring can be used, and there is no need to set the steam exhaust hole and the steam exhaust pipe on the pot cover.

[0034] Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 Three locking hook assemblies and three pull wires are used in each embodiment. During actual production and use, the number of locking hook assemblies and pull wires can be appropriately increased according to the size of the pot cover, and the centralized control assembly can be adaptively adjusted.

Claims

1. A locking device for the lid of a large pot, comprising a plurality of hook assemblies that are installed at equal angular intervals on the edge of the lid with the center of the lid as the center of the circle and are controlled by wire ropes and can lock the lid to the edge of the large pot, and is characterized in that: A centralized control component for controlling the synchronous movement of all hook assemblies through a wire is provided at the central position of the pot lid. The hook assembly includes a hook seat fixed on the pot lid, a guide sleeve is provided on the hook seat, and a sliding rod that can slide along the radius direction of the pot lid within the sliding sleeve is installed in the guide sleeve. A locking hook for cooperating with the edge of the large pot is installed at one end of the sliding rod close to the edge of the pot lid, and a wire connected to the centralized control component is connected to the other end of the sliding rod away from the edge of the pot lid.

2. The pot lid locking device for a large pot according to claim 1, wherein: At A locking hook return spring for pushing the sliding rod and the locking hook away from the edge of the large pot and releasing the locking state between the pot lid and the edge of the large pot is also installed on the hook seat.

3. The pot lid locking device for a large pot according to claim 1, characterized in that: at A hook mounting sleeve perpendicular to the sliding rod is provided at the end of the sliding rod connected to the locking hook, and the locking hook is connected to the sliding rod through the hook mounting sleeve.

4. The pot lid locking device for a large pot according to any one of claims 1 to 3, characterized in that: The centralized control component is a lifting type centralized control component. The lifting type centralized control component includes a control base installed at the central position of the pot lid, and an automatic spring bolt is fixed on the control base. The automatic spring bolt includes a bolt seat and a bolt rod. An unlocking button is provided on the bolt seat. The bolt rod is perpendicular to the central plane of the pot lid. A lifting cross beam for lifting the bolt rod upward is provided on the bolt rod. Each wire converges and is connected to the lower end of the bolt rod of the automatic spring bolt.

5. The pot lid locking device for a large pot according to claim 4, characterized in that: A central hole is opened at the central position of the control base, and wire bending conduits corresponding to the number and orientation of the hook assemblies are installed in the central hole. Each wire starts from the sliding rod of the corresponding hook assembly, passes through the wire bending conduit to change the direction, and then is connected to the lower end of the bolt rod.

6. The pot lid locking device for a large pot according to claim 4, characterized in that: A palm rest for supporting the palm is provided at the upper end of the control base, and a telescopic accommodation cavity for the upper end of the bolt rod is provided in the palm rest.

7. The pot lid locking device for a large pot according to any one of claims 1 to 3, characterized in that: The centralized control component is a lifting type centralized control component. The lifting type centralized control component includes a control base installed at the central position of the pot lid. A vertical guide post coaxial with the pot lid is provided at the central position of the control base. A sliding sleeve is sleeved on the vertical guide post, and a lifting handle is installed on the sliding sleeve. A gantry handle is also provided on the control base. The gantry handle includes two support columns symmetrically arranged in the diameter direction of the vertical guide post and a cross beam connecting the upper ends of the two support columns. A locking device for locking the lifting handle at a specified position is provided between the lifting handle and the gantry handle. Steering fixed pulleys corresponding to the number and orientation of the wires are also provided on the control base. Each wire starts from the sliding rod of the corresponding hook assembly, changes the direction through the steering fixed pulley, and then is connected to the sliding sleeve.

8. The pot lid locking device for a large pot according to any one of claims 1 to 3, characterized in that: The centralized control component is a pressing type centralized control component. The pressing type centralized control component includes a control base installed at the central position of the pot lid. A vertical guide post coaxial with the pot lid is provided at the central position of the control base. A sliding sleeve is sleeved on the vertical guide post, and a pressing beam that slides synchronously with the sliding sleeve is provided above the sliding sleeve. A bouncing core component is installed between the upper end of the vertical guide post and the pressing beam. A compression spring for pushing the sliding sleeve upward is sleeved on the vertical guide post below the sliding sleeve. Steering fixed pulleys corresponding to the number and orientation of the wires are also provided on the control base. Each wire starts from the sliding rod of the corresponding hook assembly, changes the direction through the steering fixed pulley, and then is connected to the sliding sleeve.

9. The pot lid locking device for a large pot according to any one of claims 1 to 3, characterized in that: The centralized control component is a screw - type centralized control component. The screw - type centralized control component includes a control base installed at the center position of the pot lid. At the center position of the control base, there is a vertical axis coaxial with the pot lid. A winch that can rotate on the vertical axis is installed on the vertical axis. Above the winch on the vertical axis, there is also a winch screw - turning sleeve barrel that can rotate and slide up and down on the vertical axis. A clutch plug is provided at the lower end of the winch screw - turning sleeve barrel, and a clutch socket that mates with the clutch plug is provided on the winch. Ratchet teeth are provided on the shaft body of the vertical axis, and a spring pawl that mates with the ratchet teeth is installed on the winch screw - turning sleeve barrel. The axial width of the engagement between the spring pawl and the ratchet teeth is greater than the clutch stroke between the clutch plug and the clutch socket. Steering fixed pulleys corresponding to the number and orientation of the drawstrings are also provided on the control base. Each drawstring starts from the slide rod of the corresponding hook assembly, changes direction through the steering fixed pulley, and is connected to the winch.

10. The pot lid locking device for a large pot according to claim 9, characterized in that: A limit post and a limit stop piece that cooperate with the central hole at the bottom of the winch screw - turning sleeve barrel to prevent the winch screw - turning sleeve barrel from falling off are installed at the upper end of the vertical axis. A rotary handwheel for driving the rotation of the winch screw - turning sleeve barrel is provided at the upper end of the winch screw - turning sleeve barrel.

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