Cut-off valve with spring-accumulating quick-closing structure

Abstract

The utility model relates to valve technical field, concretely is the cut -off valve of spring energy storage quick -closing structure area, including valve body, the on -off component is installed to valve body, and the on -off component includes valve rod and valve cover, and the upper portion of valve rod is equipped with square shaft, and the top of square shaft is equipped with threaded rod, and the upper portion fixedly has fixed plate of valve rod, and the top of fixed plate is equipped with spring, and the outer peripheral surface of square shaft is equipped with the limit board of sleeve, and the top of sleeve board is provided with hand wheel, and the bottom of hand wheel is installed with sleeve seat, and a pair of movable block is slidably connected in sleeve seat. The cut -off valve of spring energy storage quick -closing structure area, relies on spring energy storage to provide stable closing force, need not depend on hydraulic system, can avoid the problem of blocking failure caused by hydraulic oil backflow, can stably keep blocking state, improves blocking reliability, and the spring energy storage structure that sets up need not additional external energy supply, and the blocking and reset process rely on mechanical structure itself to realize, and get rid of the dependence on external energy such as power supply.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a shut-off valve with a spring-loaded, energy-storing, quick-closing structure. Background Technology

[0002] Shut-off valves, as key control components in fluid transport systems, are widely used in petroleum, chemical, and water treatment industries. They can quickly control the flow of fluid in pipelines according to system requirements, ensuring stable production processes or responding to emergencies. Common shut-off valves can be classified into manual, pneumatic, and electric types based on their actuation method. Their design must balance sealing performance and operational reliability to adapt to the fluid control needs under different operating conditions.

[0003] Utility model patent CN217108272U discloses a spring-loaded quick-cut-off valve. This valve includes a cutting cylinder and an elastic mechanism. A flow pipe is connected to the lower end of the cutting cylinder, with connecting flanges at both ends. The elastic mechanism includes a cutting housing and a main receiving cavity. A telescopic column is folded and housed inside the main receiving cavity. The end of the telescopic column away from the main receiving cavity is fixedly connected to one side of a blocking gate. A lifting column is located on the upper end of the cutting cylinder, with one end threaded into the cylinder. An abutment block is located inside the cutting cylinder, containing two magnetic columns. One side of the abutment block is in contact with one end of the blocking gate. A lifting handle is located at the end of the lifting column away from the cutting cylinder. A blocking gate is located at the connection between the cutting cylinder and the flow pipe. This spring-loaded quick-cut-off valve facilitates shut-off and can be switched to a manual shut-off mode when necessary.

[0004] This spring-loaded quick-closing valve relies on a hydraulic system for power supply. When the hydraulic pump stops supplying power, the hydraulic oil is prone to backflow under pressure, causing the shut-off valve to be pushed back and unable to maintain a stable shut-off state, posing a risk of fluid shut-off failure. At the same time, the stable closing of the shut-off valve depends on the magnetic force generated by the magnetic column, requiring an additional power supply unit and continuous power supply. If the power supply fails, the stable closing of the shut-off valve cannot be achieved, indicating a dependence on external energy. In view of this, we propose a shut-off valve with a spring-loaded energy storage quick-closing structure. Utility Model Content

[0005] The purpose of this invention is to provide a shut-off valve with a spring-loaded, energy-storing, quick-closing structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A shut-off valve with a spring-loaded, quick-closing structure includes a valve body, on which an opening and closing assembly is mounted. The opening and closing assembly includes a valve stem and a valve cover. The bottom end of the valve stem passes through the valve cover. A square shaft is provided on the upper part of the valve stem, and a threaded rod is provided on the top end of the square shaft. A fixing plate is fixed on the upper outer circumferential surface of the valve stem, and a spring is placed on the top end of the fixing plate. A limiting plate is fitted on the outer circumferential surface of the square shaft, and a sleeve plate is provided above the limiting plate. The outer circumferential surfaces of the valve cover, the limiting plate, and the sleeve plate are fixedly connected by several connecting rods. A handwheel is provided above the sleeve plate, and a sleeve base is installed at the bottom of the handwheel. The bottom end of the sleeve base is rotatably connected to the sleeve plate. A pair of movable blocks are slidably connected inside the sleeve base. A protrusion is provided on the outer end face of the movable block. The end of the protrusion passes through the sleeve base and has a waist-shaped groove on the side. A threaded rod extends into the space between the two movable blocks and is threadedly connected to the movable blocks. Locking rods are hinged to the left and right end faces of the sleeve base. A pin is provided on the locking rod. The pin extends into the waist-shaped groove. A shank bolt is fitted at the end of the pin. The end of the shank bolt is threadedly connected to the sleeve base.

[0007] Preferably, the bottom of the valve stem is slidably connected to the valve cover and extends into the valve body, and a piston is installed at the bottom end of the valve stem; In this configuration, the valve stem can slide stably along the valve cover, driving the piston to move within the valve body. Through the cooperation between the piston and the flow channel of the valve body, the flow and blockage of fluid can be achieved.

[0008] Preferably, the square shaft is a rod-shaped structure with a square cross-section. The valve stem, the square shaft, and the threaded rod are integrally formed. A square hole is opened in the middle of the limiting plate. The square shaft passes through the square hole and is slidably connected to the sleeve plate. The length of the square shaft is greater than the opening and closing stroke of the valve stem. In this design, the square shaft and square hole of the square structure fit together to restrict the circumferential rotation of the valve stem. The one-piece molded structure improves the connection strength and reduces transmission errors. The square shaft is long enough to ensure that the valve stem remains in contact with the shaft during the opening and closing process.

[0009] Preferably, the fixing plate is a circular plate, and an annular groove is coaxially formed on the top of the fixing plate. The bottom end of the spring abuts against the bottom of the annular groove, and the top end of the spring abuts against the bottom surface of the limiting plate, so that the spring is in a compressed state. In this configuration, the annular groove positions the bottom of the spring to prevent it from shifting. The compressed spring applies a downward force to the valve stem through the fixed plate, storing power for the quick-closing function.

[0010] Preferably, the sleeve plate has an annular plate structure, a cover plate is fixed to the bottom end of the handwheel, the cover plate is installed on the top end of the sleeve base by bolts, a rotating sleeve with a T-shaped cross section is installed at the bottom end of the sleeve base, the sleeve plate is sandwiched between the bottom end of the sleeve base and the rotating sleeve, and the sleeve base can rotate circumferentially on the sleeve plate. In this configuration, the cover plate seals the top of the sleeve to prevent impurities from entering. The rotating sleeve cooperates with the sleeve to limit the sleeve on the cover plate, while ensuring that the sleeve can rotate circumferentially, thus providing a basis for handwheel transmission.

[0011] Preferably, the sleeve has a sliding cavity with an open top, and two movable blocks are symmetrically fitted inside the sliding cavity, allowing the movable blocks to move laterally within the sliding cavity. In this configuration, the sliding cavity provides sliding space for the movable block, the open top facilitates the installation and maintenance of the movable block, and the symmetrically arranged movable blocks can move smoothly laterally, ensuring the stability of subsequent mating with the threaded rod.

[0012] Preferably, the sleeve has through slots on both the left and right end faces, and protrusions extend outward from the through slots. Threaded holes are formed on the opposing surfaces between the two movable blocks, and the threaded rod is threadedly connected to the movable block through the threaded holes. The threaded holes are divided into two by the two movable blocks. In this configuration, the through slot provides space for the movement of the protrusion, facilitating external structural control of the movable block. The split threaded hole can be opened and closed by the movable block to connect or disconnect from the threaded rod, meeting the requirements for transmission and quick closing.

[0013] Preferably, hinge seats are fixed at both ends of the sleeve, and the head end of the locking rod is hinged to the hinge seats. When the locking rod is turned so that the end of the locking rod rotates upward and fits against the sleeve, the locking rod pushes the protrusion inward through the deflector, which pushes the movable block inward, thereby closing the two movable blocks. At this time, the threaded hole is fully assembled. By rotating the handwheel, the sleeve and the movable block can be rotated, and the threaded rod can be converted into a vertical linear motion under the action of the thread. When the end of the locking rod is turned outward, the locking rod pulls the protrusion outward through the deflector, which pulls the movable block outward. At this time, the two movable blocks move away from each other in the sleeve, separating the threaded hole and causing the threaded rod to disengage from the movable block. In this configuration, the hinge provides a pivot point for the locking rod. By moving the locking rod, the opening and closing of the movable block can be controlled, enabling the threaded hole and the threaded rod to engage or disengage. This satisfies both manual transmission control and allows for rapid triggering of the closing action.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. This shut-off valve with spring-energy storage and quick-closing structure relies on spring energy storage to provide a stable closing force, without relying on a hydraulic system. This avoids the problem of shut-off failure caused by hydraulic oil backflow, and can stably maintain the shut-off state, thus improving shut-off reliability. 2. This shut-off valve with a spring-loaded energy storage and quick-closing structure does not require an additional external energy supply. The blocking and resetting processes are achieved by the mechanical structure itself, thus eliminating the dependence on external energy sources such as power supplies. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded view of the opening and closing component in this utility model; Figure 3 This is a schematic diagram of the valve stem structure in this utility model; Figure 4 This is a schematic diagram of the valve cover structure in this utility model; Figure 5 This is an exploded view of the handwheel in this utility model; Figure 6 This is a schematic diagram of the movable block in this utility model; The meanings of the labels in the diagram are as follows: 100. Valve body; 200. Opening / closing assembly; 210. Valve stem; 211. Piston; 212. Square shaft; 213. Threaded rod; 214. Fixing plate; 2141. Annular groove; 215. Spring; 220. Valve cover; 221. Limiting plate; 2211. Square hole; 222. Sleeve plate; 223. Connecting rod; 230. Handwheel; 231. Cover plate; 232. Sleeve seat; 2321. Rotating sleeve; 2322. Sliding cavity; 2323. Hinge seat; 233. Moving block; 2331. Threaded hole; 2332. Protrusion; 2333. Waist-shaped groove; 234. Locking rod; 2341. Pulley; 2342. Bolt with handle. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Please see Figures 1-6 A shut-off valve with a spring-loaded, quick-closing structure includes a valve body 100. An opening and closing assembly 200 is mounted on the valve body 100. The opening and closing assembly 200 includes a valve stem 210 and a valve cover 220. The bottom end of the valve stem 210 passes through the valve cover 220. The bottom of the valve stem 210 is slidably connected to the valve cover 220 and extends into the valve body 100. A piston 211 is mounted on the bottom end of the valve stem 210. The piston 211 can change its relative position with the internal flow channel of the valve body 100 as the valve stem 210 moves vertically, thereby realizing the basic function of fluid flow or blockage.

[0017] like Figures 2-4As shown, in this utility model, the upper part of the valve stem 210 is provided with a square shaft 212. The square shaft 212 is a rod-shaped structure with a square cross-section. A limiting plate 221 is sleeved on the outer circumferential surface of the square shaft 212. A square hole 2211 is opened in the middle of the limiting plate 2211. The square shaft 212 passes through the square hole 2211 and is slidably connected with the sleeve plate 222. The square structure of the square shaft 212 and the square hole 2211 can restrict the circumferential rotation of the valve stem 210, ensuring that the valve stem 210 can only move in the vertical direction. The length of the square shaft 212 is greater than the opening and closing stroke of the valve stem 210. This length design can ensure that the square shaft 212 always maintains a fit with the limiting plate 221 and the sleeve plate 222 during the complete opening and closing action of the valve stem 210, avoiding the situation of disengagement. A fixing plate 214 is fixed to the upper outer circumferential surface of the valve stem 210. A spring 215 is placed on the top of the fixing plate 214. The fixing plate 214 is a circular plate, and an annular groove 2141 is coaxially formed on the top of the fixing plate 214. The bottom end of the spring 215 abuts against the bottom of the annular groove 2141. The annular groove 2141 can position the bottom end of the spring 215 to prevent the spring 215 from shifting laterally during compression or extension. The top end of the spring 215 abuts against the bottom surface of the limiting plate 221. The spring 215 is in a compressed state. The compressed spring 215 can apply a downward elastic force to the valve stem 210 through the fixing plate 214, providing energy storage power for the quick-closing function of the shut-off valve without relying on external hydraulic or electrical energy. A sleeve plate 222 is provided above the limiting plate 221. The outer peripheral surfaces of the valve cover 220, the limiting plate 221 and the sleeve plate 222 are fixedly connected by several connecting rods 223. The connecting rods 223 can form a stable integral structure of the valve cover 220, the limiting plate 221 and the sleeve plate 222, providing a fixed installation support base for components such as the square shaft 212 and the spring 215.

[0018] like Figure 2 As shown, specifically, the top of the square shaft 212 is provided with a threaded rod 213. The valve stem 210, the square shaft 212 and the threaded rod 213 are integrally formed. The integrally formed structure can ensure the connection strength between the three, avoid transmission errors caused by assembly gaps, simplify the production and processing process, and improve the overall structural stability of the component.

[0019] like Figure 2 , Figure 4 and Figure 5As shown, further, the sleeve plate 222 has an annular plate structure. A handwheel 230 is provided on the top of the sleeve plate 222, and a cover plate 231 is fixed to the bottom end of the handwheel 230. A sleeve seat 232 is installed at the bottom end of the handwheel 230. The cover plate 231 is installed on the top end of the sleeve seat 232 by bolts. The cover plate 231 can seal the top end of the sliding cavity 2322 inside the sleeve seat 232 to prevent dust and impurities from entering the sliding cavity 2322 and affecting the sliding effect of the movable block 233. A rotating sleeve 2 with a T-shaped cross-section is installed at the bottom end of the sleeve seat 232. 321, the sleeve plate 222 is sandwiched between the bottom end of the sleeve seat 232 and the rotating sleeve 2321. The cooperation between the rotating sleeve 2321 and the sleeve seat 232 can limit the sleeve seat 232 on the sleeve plate 222, while not affecting the circumferential rotation of the sleeve seat 232. The sleeve seat 232 can rotate circumferentially on the sleeve plate 222, so that the bottom end of the sleeve seat 232 is rotatably connected to the sleeve plate 222. This rotatable connection provides a structural basis for the handwheel 230 to drive the sleeve seat 232 to rotate, ensuring that the function of driving the valve stem 210 to move through the rotation action is realized.

[0020] like Figure 5 and Figure 6 As shown, in addition, a sliding cavity 2322 is provided in the sleeve 232. The top of the sliding cavity 2322 is open, which facilitates the installation and maintenance of the movable block 233. A pair of movable blocks 233 are slidably connected in the sleeve 232. The two movable blocks 233 are symmetrically arranged in the sliding cavity 2322. The movable blocks 233 can move laterally in the sliding cavity 2322. The sliding cavity 2322 provides a stable sliding track for the movable blocks 233. The symmetrical arrangement can ensure the balance of clamping and transmission of the threaded rod 213 by the movable blocks 233. The outer end face of the movable block 233 is provided with a protrusion 2332, and the left and right end faces of the sleeve 232 are provided with through slots. The protrusion 2332 extends outward from the through slot, so that the end of the protrusion 2332 passes through the sleeve 232. The through slot provides space for the lateral movement of the protrusion 2332. At the same time, the design of the protrusion 2332 passing through the sleeve 232 facilitates subsequent cooperation with the lever 2341 of the locking rod 234 to realize the movement control of the movable block 233. A threaded hole 2331 is provided on the opposing surface between the two movable blocks 233. The threaded rod 213 is threadedly connected to the movable block 233 through the threaded hole 2331. The threaded hole 2331 is divided into two by the two movable blocks 233. The split threaded hole 2331 design can achieve connection or disengagement with the threaded rod 213 by opening and closing the movable blocks 233, providing a key clutch structure for the quick closing action of the shut-off valve. The threaded rod 213 extends between the two movable blocks 233 and is threadedly connected to the movable blocks 233. The threaded connection method can convert the rotational motion of the sleeve 232 into the vertical linear motion of the threaded rod 213, thereby driving the valve stem 210 to move to achieve the opening and closing function.

[0021] like Figure 5 and Figure 6 As shown, it is worth noting that a waist-shaped groove 2333 is provided on the side of the end of the protrusion 2332. Locking rods 234 are hinged to both ends of the sleeve 232, and hinge seats 2323 are fixed to both ends of the sleeve 232. The head end of the locking rod 234 is hinged to the hinge seat 2323, which provides a stable fulcrum for the locking rod 234, ensuring that the locking rod 234 can rotate flexibly around the fixed point. A deflector 2341 is provided on the locking rod 234, extending into the waist-shaped groove 2333. The cooperation between the deflector 2341 and the waist-shaped groove 2333 allows the locking rod 234 to... The rotation is converted into the lateral movement of the protrusion 2332, thereby realizing the opening and closing control of the movable block 233. The operation is convenient and the transmission is reliable. The end of the lever 2341 is fitted with a shank bolt 2342. The end of the shank bolt 2342 is threadedly connected to the sleeve 232. The shank bolt 2342 can limit the end of the locking rod 234 on the sleeve 232. By locking the position of the locking rod 234, the lever 2341 continuously applies an inward force to the protrusion 2332, thereby keeping the two movable blocks 233 in a close fit, ensuring that the threaded hole 2331 is fully assembled to stably fit the threaded rod 213.

[0022] It is worth noting that when the locking lever 234 is turned upwards and its end engages with the sleeve 232, the locking lever 234 pushes the protrusion 2332 inwards via the lever 2341, causing the protrusion 2332 to push the movable block 233 inwards, thus closing the two movable blocks 233. At this point, the threaded hole 2331 is fully assembled. By rotating the handwheel 230, the sleeve 232 and the movable block 233 can be rotated, causing the threaded rod 213 to convert into vertical linear motion under the action of the thread. This process enables the manual opening and closing operation of the shut-off valve, meeting normal requirements. Flow control requirements under operating conditions: When the end of the locking lever 234 is pushed outward, the locking lever 234 pulls the protrusion 2332 outward through the push pin 2341, causing the protrusion 2332 to pull the movable block 233 outward. At this time, the two movable blocks 233 move away from each other in the sleeve 232, causing the threaded hole 2331 to be separated, so that the threaded rod 213 is disengaged from the movable block 233. After disengagement, the valve stem 210 can move downward quickly under the elastic force of the spring 215, driving the piston 211 to achieve rapid closing, avoiding the problem of insufficient closing force or delay caused by relying on external power.

[0023] In this embodiment, the shut-off valve with a spring-loaded quick-closing structure operates as follows: First, the locking rod 234 is moved so that its end rotates upward and engages with the sleeve 232. At this time, the pusher 2341 pushes the protrusion 2332, causing the movable block 233 to close. The threaded hole 2331 is then fully assembled and threadedly connected to the threaded rod 213. Subsequently, the shank bolt 2342 is tightened to limit the end of the locking rod 234 onto the sleeve 232, keeping the two movable blocks 233 engaged. Then, the handwheel 230 is rotated as needed. The handwheel 230 rotates the sleeve 232 and the movable block 233, causing the threaded rod 213 to move the valve rod 210 vertically via threaded transmission. The valve rod 210 then drives the piston. 211 Adjusts the position of the valve body 100 flow channel to achieve fluid flow or initial blockage. At the same time, the fixed plate 214 on the valve stem 210 compresses the spring 215 to store energy. Then, when rapid shut-off is required, loosen the shank bolt 2342 and push the end of the locking rod 234 outward. The push pin 2341 pulls the protrusion 2332 to separate the movable block 233. After the threaded hole 2331 is disassembled, the threaded rod 213 disengages from the movable block 233. Finally, the compressed spring 215 releases its elastic force, pushing the fixed plate 214 to move the valve stem 210 downward quickly. The valve stem 210 drives the piston 211 to quickly block the flow channel in the valve body 100, completing the rapid closing action.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A shut-off valve with a spring-loaded quick-closing structure, comprising a valve body (100), an opening and closing assembly (200) mounted on the valve body (100), the opening and closing assembly (200) comprising a valve stem (210) and a valve cover (220), the bottom end of the valve stem (210) penetrating the valve cover (220), characterized in that: The upper part of the valve stem (210) is provided with a square shaft (212), the top end of the square shaft (212) is provided with a threaded rod (213), a fixing plate (214) is fixed on the upper outer peripheral surface of the valve stem (210), a spring (215) is placed on the top end of the fixing plate (214), a limiting plate (221) is sleeved on the outer peripheral surface of the square shaft (212), a sleeve plate (222) is provided above the limiting plate (221), and the outer peripheral surfaces of the valve cover (220), the limiting plate (221) and the sleeve plate (222) are fixedly connected by several connecting rods (223); A handwheel (230) is provided above the sleeve plate (222). A sleeve base (232) is installed at the bottom end of the handwheel (230). The bottom end of the sleeve base (232) is rotatably connected to the sleeve plate (222). A pair of movable blocks (233) are slidably connected inside the sleeve base (232). A protrusion (2332) is provided on the outer end face of the movable block (233). The end of the protrusion (2332) passes through the sleeve base (232) and has a waist-shaped groove (2333) on the side. The threaded rod (213) extends between the two movable blocks (233) and is threadedly connected to the movable blocks (233). Locking rods (234) are hinged to the left and right end faces of the sleeve (232). A lever (2341) is provided on the locking rod (234). The lever (2341) extends into the waist-shaped groove (2333). A shank bolt (2342) is sleeved at the end of the lever (2341). The end of the shank bolt (2342) is threadedly connected to the sleeve (232).

2. The shut-off valve with spring-loaded energy storage and quick-closing structure according to claim 1, characterized in that: The bottom of the valve stem (210) is slidably connected to the valve cover (220) and extends into the valve body (100). A piston (211) is installed at the bottom end of the valve stem (210).

3. The shut-off valve with spring-loaded energy storage and quick-closing structure according to claim 1, characterized in that: The square shaft (212) is a rod-shaped structure with a square cross-section. The valve stem (210), the square shaft (212) and the threaded rod (213) are integrally formed. A square hole (2211) is opened in the middle of the limiting plate (221). The square shaft (212) passes through the square hole (2211) and slides through the sleeve plate (222). The length of the square shaft (212) is greater than the opening and closing stroke of the valve stem (210).

4. The shut-off valve with spring-loaded energy storage and quick-closing structure according to claim 1, characterized in that: The fixing plate (214) is a circular plate. The top of the fixing plate (214) is coaxially provided with an annular groove (2141). The bottom end of the spring (215) abuts against the bottom of the annular groove (2141). The top end of the spring (215) abuts against the bottom surface of the limiting plate (221). The spring (215) is in a compressed state.

5. The shut-off valve with spring-loaded energy storage and quick-closing structure according to claim 1, characterized in that: The sleeve plate (222) has an annular plate structure. The bottom end of the handwheel (230) is fixed with a cover plate (231). The cover plate (231) is installed on the top of the sleeve seat (232) by bolts. The bottom end of the sleeve seat (232) is equipped with a rotating sleeve (2321) with a T-shaped cross section. The sleeve plate (222) is sandwiched between the bottom end of the sleeve seat (232) and the rotating sleeve (2321). The sleeve seat (232) can rotate circumferentially on the sleeve plate (222).

6. The shut-off valve with spring-loaded energy storage and quick-closing structure according to claim 1, characterized in that: The sleeve (232) has a sliding cavity (2322) inside. The top of the sliding cavity (2322) is open. Two movable blocks (233) are symmetrically fitted inside the sliding cavity (2322). The movable blocks (233) can move laterally inside the sliding cavity (2322).

7. The shut-off valve with spring-loaded energy storage and quick-closing structure according to claim 1, characterized in that: The sleeve (232) has through slots on both the left and right end faces, and the protrusion (2332) extends outward from the through slots. The opposing surfaces between the two movable blocks (233) have threaded holes (2331). The threaded rod (213) is threadedly connected to the movable block (233) through the threaded hole (2331). The threaded hole (2331) is divided into two by the two movable blocks (233).

8. The shut-off valve with spring-loaded energy storage and quick-closing structure according to claim 7, characterized in that: Hinges (2323) are fixed to both the left and right end faces of the sleeve (232). The head end of the locking rod (234) is hinged to the hinge (2323). When the locking rod (234) is moved so that its end rotates upward and fits against the sleeve (232), the locking rod (234) pushes the protrusion (2332) inward through the lever (2341), causing the protrusion (2332) to push the movable block (233) inward, thereby closing the two movable blocks (233). At this time, the threaded hole (2331) is fully assembled. By rotating the handwheel ( 230) The rotation of the sleeve (232) and the movable block (233) can cause the threaded rod (213) to be converted into a vertical linear motion under the action of the thread. When the end of the locking rod (234) is pushed outward, the locking rod (234) pulls the protrusion (2332) outward through the push pin (2341), causing the protrusion (2332) to pull the movable block (233) outward. At this time, the two movable blocks (233) move away from each other in the sleeve (232), causing the threaded hole (2331) to be separated, so that the threaded rod (213) is disengaged from the movable block (233).

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