Discharging system with mechanically-operated bottom valve

Abstract

A discharging system with a mechanically operated bottom valve comprises at least one mechanical bottom valve installed at the bottom of a tank body; the mechanical control switch is connected with the mechanical bottom valve through a steel wire rope; the pulley block is arranged on the frame, and the steel wire rope penetrates through the pulley block to achieve direction change; the stay wire fixing pipe is fixed on a frame, and the steel wire rope penetrates through the stay wire fixing pipe to limit the stay wire fixing pipe from drooping and shaking; the device is novel in structure, the whole structure of pure mechanical transmission (the steel wire rope serves as a core transmission component, and no extra power source exists) is adopted, the device does not need to depend on external power such as an air source, the discharging process can be completed only through manual operation, and energy conservation and environment protection are achieved; and the system is simple in structure, only needs little lubrication maintenance, and is low in failure rate, visual and simple to overhaul, convenient to maintain and low in maintenance cost.

Description

TECHNICAL FIELD

[0001] The present application relates to a discharge system, in particular to a discharge system using mechanical operation of a bottom valve. BACKGROUND

[0002] In the field of tank vehicle transportation, the discharge system is a core component for tankers to unload materials. Its operation mode and reliability directly affect the use scenarios, maintenance costs and work efficiency of vehicles, and needs to be designed in combination with the actual needs and use environment of different market regions.

[0003] In the current market, the operation mode of the bottom valve of the discharge system is mainly divided into pneumatic operation and mechanical operation. Among them, the pneumatic operation of the bottom valve needs to be inflated to a certain pressure value through the pipeline to realize the opening. Although it is widely used in some scenarios, it has obvious limitations: when the vehicle is in an environment without gas supply (such as remote outdoor operation area), or the gas supply system fails, the bottom valve cannot be normally opened, directly leading to the interruption of the discharge operation; at the same time, the pneumatic system involves multiple complex components such as pipelines, air pumps, control valves, etc. Not only is the failure rate relatively high, but also when maintaining, it needs to check the air tightness of the gas circuit, the air pressure adaptability of the components, etc., which is difficult to operate and has high maintenance cost. SUMMARY

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present application provides a discharge system using mechanical operation of a bottom valve, which effectively solves the problems mentioned in the background art.

[0005] In order to achieve the above purpose, the present application provides the following technical scheme: the present application comprises: at least one mechanical bottom valve installed at the bottom of the tank body; a mechanical control switch connected with the mechanical bottom valve through a steel wire rope; a pulley block arranged on the vehicle frame, the steel wire rope passing through the pulley block to realize direction transformation; a stay wire fixing pipe fixed on the vehicle frame, the steel wire rope passing through the stay wire fixing pipe to limit its sagging and shaking; an emergency operating rod connected with the mechanical control switch through a steel wire rope, and operating the emergency operating rod can trigger the mechanical control switch and simultaneously close all mechanical bottom valves.

[0006] Preferably, the pulley block comprises a pulley and an anti-falling structure arranged on both sides of the pulley, which is used to prevent the steel wire rope from falling out.

[0007] Preferably, the anti-falling structure is a galvanized iron wire, which is spot-welded on both sides of the pulley.

[0008] Preferably, the inner outlet of the stay wire fixing pipe is rounded, and the inside is coated with a lubricant.

[0009] Preferably, the number of emergency operating levers is multiple, and they are arranged at the tail, left front and right front of the tank body, respectively.

[0010] Preferably, the mechanical operating switch comprises an operating handle, a base and a release mechanism, the operating handle controls the opening and closing of the mechanical bottom valve through a steel wire rope, and the release mechanism is used to release all operating handles at the same time in emergency operation.

[0011] Preferably, the release mechanism comprises a return handle, a lever, a release U-shaped plate, a return spring and a short pin shaft, the return handle is connected with the emergency operating lever through a steel wire rope, and the operation of the emergency operating lever drives the release mechanism to unlock all operating handles.

[0012] The control method of the mechanically operated unloading system, the method is based on a set of pure mechanical transmission system, which comprises at least one mechanical bottom valve, one mechanical operating switch and at least one emergency operating lever connected through a steel wire rope, the method comprises: S1: Selective unloading channel establishment Through a single operating action of a single operating handle in the mechanical operating switch, the designated unloading channel is opened via steel wire transmission, overcoming the return spring force of the corresponding mechanical bottom valve; The operating handle is moved to beyond its self-locking critical point, and mechanical self-locking is realized through cooperation with the release U-shaped plate, so as to maintain the stable opening state of the unloading channel without continuous manual intervention; S2: Normal locking After a small unlocking displacement is applied to the operating handle in the self-locking state, the operating handle is automatically reset and unlocked by using the internal structural relationship of the mechanical operating switch; Then, the corresponding mechanical bottom valve is automatically closed under the pulling force of its return spring, cutting off the unloading channel; S3: Multi-position cooperative emergency shutdown In an emergency state, any one of the emergency operating levers arranged at different positions of the tank body is triggered; The emergency operating force transmitted through the steel wire rope drives the release mechanism inside the mechanical operating switch to produce linkage; The linkage action of the release mechanism synchronously and forcibly releases the self-locking state of all operating handles, and resets them collectively; Thus, the synchronous and rapid closing of all mechanical bottom valves is realized, and all unloading channels are cut off at one time; S4: System lossless reset After the trigger of the emergency operating lever is released, the release mechanism automatically returns to its initial standby state under the restoring force of the return spring and the action of gravity, without affecting the next normal operation of the unloading system.

[0013] Preferably, in the multi-position cooperative emergency shutdown step S3, any one of the at least three emergency operating levers arranged at the tail, left front and right front of the tank body can independently trigger the global shutdown instruction, realizing multi-directional and redundant safety access.

[0014] Preferably, in the selective unloading channel establishment step S1 and the multi-position cooperative emergency shutdown step S3, one or more pulley blocks with anti-disengagement structures are arranged on the transmission path of the steel wire rope. The anti-disengagement structure is realized by forming a semi-enclosed structure by spot welding galvanized iron wires on both sides of the pulley, so that if the steel wire rope disengages during transmission, it can be automatically guided back into the wire groove of the pulley when the steel wire rope is tensioned.

[0015] Beneficial effects: Through the "pulley block (including pulley and galvanized iron wire)" structure: the galvanized iron wires are spot welded on both sides of the pulley seat to form an anti-disengagement structure, which not only realizes multi-angle steering of the steel wire rope through the pulley to ensure flexible transmission between the mechanical bottom valve, emergency operating lever and mechanical control switch, but also prevents the steel wire rope from disengaging from the pulley. Even if it occasionally disengages, it can quickly return to position by tensioning the steel wire rope, improving transmission stability and operation reliability.

[0016] Through the "pulling line fixing pipe (internal outlet reverse internal fillet, internal greasing)" structure: fixed on the vehicle frame at intervals, the internal outlet reverse internal fillet and greasing can avoid scratching the steel wire rope, limit the sagging of the steel wire rope during long-distance transmission and the shaking during driving, reduce the risk of steel wire rope breakage, prolong its service life, and ensure long-term stable operation of the system.

[0017] Through the "mechanical bottom valve (with return spring)" structure: during normal closing, the valve is quickly closed relying on the return spring tension; during emergency closing, the return spring tension is also used to ensure that all bottom valves are closed synchronously without the need for an additional power source, realizing pure mechanical control, and the closing response is rapid, ensuring controllability of the unloading process.

[0018] Through the "mechanical control switch (including operating handle and release U-shaped plate)" structure: when the operating handle is pulled to the lowest position, it is close to the release U-shaped plate and exceeds the rotation point to form self-locking, which can continuously maintain the mechanical bottom valve in the open state, ensuring continuous unloading process; when unlocked, it can automatically reset after pulling the operating handle a small distance and then releasing it, which is simple and easy to operate, reducing the difficulty of personnel operation.

[0019] Through the "emergency operating rod (tank body tail, front and left and right side total one) + release mechanism (return handle, lever, release U-shaped plate, return spring, short pin shaft)" structure: any one emergency operating rod can drive the release mechanism through the steel wire rope, and all operating handles are synchronously unlocked and reset through linkage, and then all mechanical bottom valves are quickly closed, so that the unloading channel can be quickly cut off in the emergency such as pipeline leakage, the situation is prevented from expanding, and the system safety protection capability is improved.

[0020] Through the "pure mechanical transmission (steel wire rope as the core transmission component, without additional power source)" overall structure: without relying on external power such as gas source, the unloading process can be completed through manual operation, energy saving and environmental protection; and the system structure is simple, only a little lubrication and maintenance are needed, the failure rate is low, the maintenance is intuitive and simple, the maintenance is convenient, the maintenance cost is low, especially suitable for remote backward areas, meets the specific market demand, has market promotion value and economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings are used to provide further understanding of the present application, and constitute a part of the specification, together with embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application. In the drawings: Fig. 1 is the overall front view of the present application; Fig. 2 is the bottom view of the present application; Fig. 3 is the pulley arrangement structure schematic view of the present application; Fig. 4 is the operating handle installation structure schematic view of the present application; Fig. 5 is the release mechanism side view of the present application; Fig. 6 is the top view of the present application. DETAILED DESCRIPTION

[0022] The accompanying drawings are used to provide further understanding of the present application, and constitute a part of the specification, together with embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application. In the drawings: Figs. 1-6 The specific embodiments of the present application are further described in detail.

[0023] Embodiment one, provided by Figs. 1-6 The present application provides a bottom valve mechanical operation unloading system, comprising: At least one mechanical bottom valve 3 is installed at the bottom of the tank body 1; Mechanical operating switch 8 is connected with the mechanical bottom valve 3 through the steel wire rope 5; The pulley block 6 is arranged on the vehicle frame 2, and the steel wire rope 5 passes through the pulley block 6 to realize direction transformation; The pull wire fixing pipe 4 is fixed on the vehicle frame 2, and the steel wire rope 5 passes through the pull wire fixing pipe 4 to limit the sag and swing; Emergency operating lever 7, connected with the mechanical operating switch 8 through the steel wire rope 5, operating the emergency operating lever 7 can trigger the mechanical operating switch 8 and close all mechanical bottom valves 3 at the same time.

[0024] Mechanical bottom valve 3, installation position: the lowest part of the bottom of each bin of the tank body 1, ensuring that the materials in the tank can be completely discharged; Function: as a key control component of the discharge channel, it is opened by the tension of the steel wire rope 5 and closed by the tension of the self-return spring, controlling the discharge process of the materials in the tank.

[0025] Mechanical operating switch 8, installation position: the right side of the tank body 1 outside; Composition: including operating handle 11, base 12 and release mechanism 13; Function: operating the steel wire rope 5 through the operating handle 11, and then controlling the opening and closing of the mechanical bottom valve 3; the operating handle 11 can be self-locked after being pulled into place, ensuring the stability of the discharge process; the release mechanism 13 can unlock all operating handles 11 in emergency situations, triggering the closing of the mechanical bottom valve 3.

[0026] Steel wire rope 5, function: connecting the mechanical bottom valve 3, the mechanical operating switch 8 and the emergency operating lever 7, transmitting the operating force, and being the core transmission component for realizing the linkage of each component.

[0027] Pulley block 6, installation position: suitable position inside the vehicle frame 2; Composition: composed of pulley 10 and anti-extrusion structure (galvanized iron wire 9), the galvanized iron wire 9 is spot-welded on both sides of the pulley 10 seat, forming a semicircular surrounding structure; Function: changing the transmission direction of the steel wire rope 5, realizing the flexible connection between the mechanical bottom valve 3, the emergency operating lever 7 and the mechanical operating switch 8; the anti-extrusion structure can prevent the steel wire rope 5 from extruding out of the pulley 10, and even if it occasionally extrudes out, it can be returned to its original position by tightening the steel wire rope 5.

[0028] Pull wire fixing tube 4, installation position: fixed on the vehicle frame 2 at intervals; Structural features: the inner outlet has an inner fillet, and the inside is coated with butter (lubricant); Function: limiting the sagging of the steel wire rope 5 during long-distance transmission, avoiding the shaking and breaking of the steel wire rope 5 during the driving process; the inner fillet and butter can prevent the pull wire fixing tube 4 from scratching the steel wire rope 5, prolonging the service life of the steel wire rope 5.

[0029] Emergency operating lever 7, installation position: three positions, the tail of the tank body 1, the left side of the front and the right side of the front; Function: in emergency situations (such as pipeline leakage), operating any one of the emergency operating levers 7 can drive the release mechanism 13 of the mechanical operating switch 8 through the steel wire rope 5, and then trigger the closing of all mechanical bottom valves 3, preventing the situation from getting worse.

[0030] Release mechanism 13: Release mechanism 13 is the core emergency control component of mechanical operation switch 8, which is composed of return handle 14, push rod 15, release U-shaped plate 16, return spring 17 and short pin shaft 18, and the functions of each part are as follows: Return handle 14: It is fixed on base 12 through short pin shaft 18 and can rotate around short pin shaft 18; it is connected with emergency operating lever 7 through steel wire rope 5 at the top, and is welded with push rod 15 at the left lower inner side, and is connected with the fixed hole on base 12 through return spring 17 at the right lower side, which is used to transfer the control force of emergency operating lever 7.

[0031] Push rod 15: It is welded at the left lower inner side of return handle 14 and rotates with return handle 14, which can push release U-shaped plate 16 to move up and down and realize the unlocking of operating handle 11 by release U-shaped plate 16.

[0032] Release U-shaped plate 16: It is fixed on base 12 through short pin shaft 18 and can rotate around short pin shaft 18; operating handle 11 is locked when it is pulled to the lowest position and is close to release U-shaped plate 16, and when it is pushed up by push rod 15, it can drive operating handle 11 to unlock and reset.

[0033] Return spring 17: One end is hung at the right lower side of return handle 14, and the other end is fixed in the hole of base 12; it is stretched during emergency operation, and after the emergency operating lever 7 is released, it pulls return handle 14 to rotate counterclockwise to reset through the elastic force, and at the same time, release U-shaped plate 16 falls back under the action of gravity, which does not affect the next use of operating handle 11.

[0034] Short pin shaft 18: It is used to fix return handle 14 and release U-shaped plate 16 on base 12 and provide a rotating fulcrum for them.

[0035] The control method of the mechanical operation unloading system, which is realized based on a set of pure mechanical transmission system, the system includes at least one mechanical bottom valve 3, one mechanical operation switch 8 and at least one emergency operating lever 7 connected through steel wire rope 5, the method includes: S1: Selective unloading channel establishment Through the single operation action of single operating handle 11 in the mechanical operation switch 8, the specified unloading channel is opened through the transmission of steel wire rope 5, overcoming the return spring force of the corresponding mechanical bottom valve 3; Make the operating handle 11 move beyond the self-locking critical point, realize mechanical self-locking through cooperation with release U-shaped plate 16, so as to maintain the stable opening state of the unloading channel without continuous manual intervention; S2: Normal locking After a small unlocking displacement is applied to the operating handle 11 in the self-locking state, the operating handle 11 is automatically reset and unlocked by using the internal structural relationship of the mechanical operation switch 8; Immediately, the corresponding mechanical bottom valve 3 is automatically closed under the pulling force of its return spring, cutting off the discharge channel; S3: Multi-position cooperative emergency shutdown In an emergency, trigger any one of the emergency operating levers 7 arranged at different positions of the tank body 1; The emergency operating force transmitted through the steel wire rope 5 drives the release mechanism 13 inside the mechanical operating switch 8 to produce linkage; The linkage action of the release mechanism 13 synchronously and forcibly releases the self-locking state of all operating handles 11, and collectively resets them; Thus, the synchronous and rapid closing of all mechanical bottom valves 3 is realized, and all discharge channels are cut off at one time; S4: System lossless reset After the trigger of the emergency operating lever 7 is released, the release mechanism 13 automatically returns to its standby initial state under the restoring force of the return spring 17 and the action of gravity, without affecting the next normal operation of the discharge system.

[0036] In the multi-position cooperative emergency shutdown step S3, any one of the at least three emergency operating levers 7 arranged at the tail, front left side and front right side of the tank body 1 can independently trigger the global shutdown instruction, realizing multi-position and redundant safety access.

[0037] In the selective discharge channel establishment step S1 and the multi-position cooperative emergency shutdown step S3, one or more pulley blocks 6 with anti-disengagement structures are arranged on the transmission path of the steel wire rope 5; Among them, the anti-disengagement structure is realized by forming a half-enclosed structure by spot welding galvanized iron wire 9 on both sides of the pulley 10, so that if the steel wire rope 5 disengages during transmission, it can be automatically guided back into the wire groove of the pulley 10 when the steel wire rope 5 is tensioned.

[0038] Operation and control method S1: Selective discharge channel establishment (opening and self-locking) According to the discharge requirement, operate the corresponding single operating handle 11 on the mechanical operating switch 8.

[0039] Pull the operating handle in the specified direction, and the operating force is transmitted to the target mechanical bottom valve 3 through the steel wire rope 5, overcoming the pulling force of its return spring, so that the bottom valve is opened.

[0040] Continue to pull the operating handle, so that its movement exceeds the self-locking critical point. At this time, the handle will cooperate with the release U-shaped plate 16 to realize mechanical self-locking.

[0041] Self-locking state confirmation: the handle is stable in the open position, no need to continuously apply operating force, the discharge channel remains unblocked, normal discharge can be started.

[0042] S2: normal locking (single channel closed) When the channel needs to be closed after discharge, a small force is applied to the self-locked operating handle 11 in the closing direction (i.e. unlocking displacement), and then released.

[0043] After unlocking, the operating handle will automatically reset to the initial position under the action of the internal mechanism, and the self-locking state is released.

[0044] At the same time, the corresponding mechanical bottom valve 3 quickly closes under the pulling force of its return spring, cutting off the discharge channel.

[0045] S3: multi-position cooperative emergency shutdown (full system emergency shutdown) When an emergency occurs, the operator can immediately trigger any emergency operating rod 7 set on the tank 1 (such as the tail, front left or front right).

[0046] The force of pulling the emergency operating rod is transmitted to the release mechanism 13 inside the mechanical operating switch 8 through the steel wire rope 5, driving it to produce linkage.

[0047] The linkage of the release mechanism will simultaneously and forcibly act on the self-locking mechanism of all operating handles 11, instantaneously releasing the self-locking state of all handles.

[0048] All operating handles automatically reset, and at the same time, all mechanical bottom valves 3 are synchronously and quickly closed under the action of their respective return springs, one-time cutting off all discharge channels, achieving emergency shutdown.

[0049] S4: system lossless reset (after emergency) After the emergency is resolved, only the triggered emergency operating rod 7 needs to be pushed back to its original position and released.

[0050] The release mechanism 13 will automatically recover to the standby initial state under the restoring force of the return spring 17 and its own gravity.

[0051] At this time, the system has been completely reset, and all mechanical operating switches 8 and mechanical bottom valves 3 can be operated normally next time without any additional repair or adjustment.

[0052] Steel wire rope anti-disengagement pulley set 6: to ensure system reliability, multiple pulley sets 6 are set on the transmission path of the steel wire rope 5.

[0053] Each pulley 10 uses spot welding galvanized iron wire 9 on both sides to form a reliable anti-disengagement semi-enclosed structure.

[0054] This structure can ensure that even if the steel wire rope is slightly out of the track, it can be automatically guided back into the groove of the pulley during the tensioning process, effectively preventing the steel wire rope from completely derailing and ensuring continuous transmission.

[0055] Multi-directional emergency operation: The system is provided with at least three emergency operation levers 7 at the tail, front left and front right of the tank, forming a redundant safety access network.

[0056] This design ensures that no matter where the danger is found in the tank, the operator can trigger the emergency shutdown at the nearest location, greatly improving the emergency response speed and operation safety.

[0057] Normal unloading process (opening and closing), mechanical bottom valve 3 is opened; Operation trigger: The operator pulls the operation handle 11 of the mechanical operation switch 8 installed on the right side of the tank 1, and pulls the operation handle 11 towards himself.

[0058] Force transmission: The other end of the operation handle 11 drives the steel wire rope 5, which in turn passes through the pulley block 6 inside the frame 2 and the pull wire fixing pipe 4 on the frame 2 - the pulley block 6 is composed of pulleys 10 and galvanized iron wires 9, which are spot welded on both sides of the pulley 10 seat to form a anti-out structure, and can realize flexible transmission of the steel wire rope 5 through angle steering; The outlet of the pull wire fixing pipe 4 is internally chamfered and internally coated with yellow oil, which can limit the sagging and shaking of the steel wire rope 5, ensuring stable transmission, and finally the steel wire rope 5 applies tension to the mechanical bottom valve 3.

[0059] Bottom valve opening: The mechanical bottom valve 3 overcomes the tension of its own return spring, and the internal valve is opened, the material in the tank relies on gravity and is discharged through the mechanical bottom valve 3 at the lowest part of each tank bottom, and enters the unloading state.

[0060] Self-locking: When the operation handle 11 is pulled to the lowest position, the operation handle 11 is close to the release U-shaped plate 16 (a component of the release mechanism 13) in the mechanical operation switch 8, and exceeds the rotation point to form self-locking, the steel wire rope 5 continuously maintains the tension on the mechanical bottom valve 3, ensuring that the bottom valve remains open, and ensuring that the unloading process continues.

[0061] Mechanical bottom valve 3 is closed; Unlocking operation: The operator pulls the operation handle 11 in the self-locking state a small distance towards himself and then releases it, and the operation handle 11 is out of the self-locking state and automatically releases the reset.

[0062] Tension release: After the operation handle 11 is reset, the steel wire rope 5 no longer applies tension to the mechanical bottom valve 3.

[0063] Bottom valve closing: the closing mechanism of the mechanical bottom valve 3 is activated under the pulling force of the self-return spring, driving the internal valve to close quickly, cutting off the discharge channel of the material in the tank, and stopping the unloading process.

[0064] Emergency shutdown process: when an emergency such as pipeline leakage occurs, all unloading operations need to be terminated immediately. By operating any one of the emergency operating levers 7 at the tail, front left or front right of the tank body 1, the system emergency shutdown mechanism is triggered, and the specific steps are as follows: Emergency trigger: the operator pulls any one of the emergency operating levers 7, and the emergency operating lever 7 transmits the pulling force to the release mechanism 13 of the mechanical control switch 8 through the steel wire rope 5 (the release mechanism 13 is composed of a return handle 14, a push rod 15, a release U-shaped plate 16, a return spring 17 and a short pin shaft 18).

[0065] Release mechanism 13 linkage: the steel wire rope 5 pulls the return handle 14 in the release mechanism 13, which is fixed on the base 12 through the short pin shaft 18. At this time, it rotates around the short pin shaft 18, and at the same time, it stretches the return spring 17 connected between the return handle 14 and the base 12; with the rotation of the return handle 14, the push rod 15 welded on the lower left side of the return handle 14 rotates synchronously, pushing the release U-shaped plate 16 (fixed on the base 12 through the short pin shaft 18) to lift upward around the short pin shaft 18.

[0066] Unlocking the operating handle 11: when the release U-shaped plate 16 is lifted, it simultaneously unlocks and lifts all the operating handles 11 (fixed on the base 12 through the long pin shaft 19) in the self-locking state, and the operating handle 11 quickly resets.

[0067] Full bottom valve closing: after the operating handle 11 resets, all steel wire ropes 5 connected to the mechanical bottom valve 3 lose pulling force, and the internal valve of each mechanical bottom valve 3 closes under the pulling force of the self-return spring, completely cutting off all discharge channels to prevent the situation from getting worse.

[0068] System reset: after the emergency operation is over, the operator releases the emergency operating lever 7, and the return spring 17 pulls the return handle 14 counterclockwise to the lowest position under the action of the elastic force; the release U-shaped plate 16 falls to the lowest position under the action of gravity, restoring the initial state and not affecting the subsequent normal opening operation of the operating handle 11, and the system returns to standby state.

[0069] Through the "pulley block 6 (including pulley 10, galvanized iron wire 9)" structure: the galvanized iron wire 9 is spot-welded on both sides of the pulley 10 seat to form a anti-disengagement structure, which not only realizes multi-angle steering of the steel wire rope 5 through the pulley 10, ensuring flexible transmission between the mechanical bottom valve 3, the emergency operating lever 7 and the mechanical control switch 8, but also prevents the steel wire rope 5 from disengaging from the pulley 10. Even if it occasionally disengages, it can quickly return to position by tightening the steel wire rope 5, improving transmission stability and operation reliability.

[0070] Through the "pulling line fixing pipe 4 (inner outlet inner fillet, internal greasing)" structure: fixed on the frame 2 at intervals, the inner fillet of the inner outlet and the grease can avoid scratching the steel wire rope 5, while limiting the drooping of the steel wire rope 5 in long distance transmission and the shaking in driving, reducing the risk of breaking of the steel wire rope 5, prolonging its service life, and ensuring long-term stable operation of the system.

[0071] Through the "mechanical bottom valve 3 (with return spring)" structure: when normally closed, the valve is quickly closed relying on the return spring tension; when emergency closed, the return spring tension is also used to ensure that all bottom valves are closed synchronously, without the need for additional power source, realizing pure mechanical control, and the closing response is quick, ensuring controllability of the unloading process.

[0072] Through the "mechanical control switch 8 (including operation handle 11, release U-shaped plate 16)" structure: when the operation handle 11 is pulled to the lowest position, it is close to the release U-shaped plate 16 and exceeds the rotation point to form self-locking, which can continuously maintain the open state of the mechanical bottom valve 3, ensuring continuous unloading process; when unlocking, only a small distance of the operation handle 11 needs to be pulled and then released, which can automatically reset, the operation is simple and easy, and the difficulty of personnel operation is reduced.

[0073] Through the "emergency operation rod 7 (tank body 1 tail, front left and right side a total of 3) + release mechanism 13 (return handle 14, push rod 15, release U-shaped plate 16, return spring 17, short pin shaft 18)" structure: any one of the emergency operation rod 7 can drive the release mechanism 13 through the steel wire rope 5, and all operation handles 11 are synchronously unlocked and reset through linkage, so that all mechanical bottom valves 3 are quickly closed, which can quickly cut off the unloading channel in the case of pipeline leakage and other emergencies, prevent the situation from expanding, and improve the safety protection capability of the system.

[0074] Through the "pure mechanical transmission (steel wire rope 5 is the core transmission component, without additional power source)" overall structure: without relying on external power such as gas source, the unloading process can be completed only by manual operation, which is energy-saving and environment-friendly; and the system structure is simple, only a little lubrication and maintenance are needed, the failure rate is low, the maintenance is intuitive and simple, the maintenance is convenient, the maintenance cost is low, it is especially suitable for remote and backward areas, meets the specific market demand, has market promotion value and economic benefits.

[0075] Finally, it should be pointed out that: the above only describes the preferred embodiments of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A mechanically operated unloading system with a bottom valve, comprising: At least one mechanical bottom valve (3) is installed at the bottom of the tank body (1); The mechanical control switch (8) is connected to the mechanical bottom valve (3) via a steel wire rope (5); A pulley block (6) is arranged on the frame (2), and the wire rope (5) passes through the pulley block (6) to achieve a change of direction; A cable fixing tube (4) is fixed to the frame (2), and the wire rope (5) passes through the cable fixing tube (4) to limit its drooping and swaying; The emergency operating lever (7) is connected to the mechanical control switch (8) via a steel wire rope (5). Operating the emergency operating lever (7) can trigger the mechanical control switch (8) to simultaneously close all mechanical bottom valves (3).

2. The unloading system using a mechanically operated bottom valve according to claim 1, characterized in that: The pulley block (6) includes pulleys (10) and anti-detachment structures. The anti-detachment structures are arranged on both sides of the pulleys (10) to prevent the wire rope (5) from detaching.

3. The unloading system using a mechanically operated bottom valve according to claim 2, characterized in that: The anti-detachment structure is galvanized iron wire (9), which is spot-welded to both sides of the pulley (10).

4. The unloading system using a mechanically operated bottom valve according to claim 1, characterized in that: The inner outlet of the pull wire fixing tube (4) has rounded corners and is coated with lubricant.

5. The unloading system using a mechanically operated bottom valve according to claim 1, characterized in that: The number of emergency operating levers (7) is multiple, and they are respectively arranged at the tail, front left and front right of the tank body (1).

6. The unloading system using a mechanically operated bottom valve according to claim 1, characterized in that: The mechanical control switch (8) includes an operating handle (11), a base (12), and a release mechanism (13). The operating handle (11) controls the opening and closing of the mechanical bottom valve (3) via a wire rope (5). The release mechanism (13) is used to release all operating handles (11) simultaneously in emergency operation.

7. A mechanically operated unloading system with a bottom valve according to claim 6, characterized in that: The release mechanism (13) includes a return handle (14), a lever (15), a release U-shaped plate (16), a return spring (17), and a short pin (18). The return handle (14) is connected to the emergency operating lever (7) via a wire rope (5). When the emergency operating lever (7) is operated, the release mechanism (13) unlocks all operating handles (11).

8. A control method using any one of the mechanical unloading systems described in claims 1-7, characterized in that, The method is based on a purely mechanical transmission system, which includes at least one mechanical bottom valve (3) linked by a wire rope (5), a mechanical control switch (8), and at least one emergency operating lever (7). The method includes: S1: Establishment of selective unloading channel By a single operation of the single operating handle (11) in the mechanical control switch (8), the designated unloading channel is opened by overcoming the return spring force of the corresponding mechanical bottom valve (3) through the transmission of the wire rope (5). The operating handle (11) is moved to exceed its self-locking critical point, and mechanical self-locking is achieved through cooperation with the release U-shaped plate (16), thereby maintaining the stable opening state of the unloading channel without continuous human intervention; S2: Normal locking After applying a small unlocking displacement to the self-locking operating handle (11), the handle is released, and the operating handle (11) is automatically reset and the self-locking is released by utilizing the internal structure of the mechanical operating switch (8). Immediately, the corresponding mechanical bottom valve (3) automatically closes under the tension of its return spring, cutting off the unloading channel; S3: Multi-location coordinated emergency shutdown In an emergency, trigger any one of the emergency operating levers (7) located in different positions on the tank (1). The emergency operating force transmitted through the steel wire rope (5) drives the release mechanism (13) inside the mechanical control switch (8) to generate a linkage. The linkage action of the release mechanism (13) synchronously and forcibly releases the self-locking state of all operating handles (11), causing them to collectively reset; This enables the synchronous and rapid closure of all mechanical bottom valves (3), cutting off all unloading channels at once; S4: System non-destructive reset After the emergency operation lever (7) is deactivated, the release mechanism (13) automatically returns to its standby initial state under the restoring force of the return spring (17) and gravity, without affecting the next normal operation of the unloading system.

9. The control method for a foot valve using a mechanically operated unloading system according to claim 8, characterized in that: In the multi-location coordinated emergency shutdown step (S3), any one of the at least three emergency operating levers (7) located at the tail, front left and front right of the tank (1) can independently trigger the global shutdown command, thereby achieving multi-directional and redundant safe access.

10. The control method for a mechanically operated unloading system using a bottom valve according to claim 8, characterized in that: In the selective unloading channel establishment step (S1) and the multi-position coordinated emergency shutdown step (S3), one or more pulley blocks (6) with anti-detachment structures are provided on the transmission path of the wire rope (5). The anti-detachment structure is achieved by spot welding galvanized iron wire (9) on both sides of the pulley (10) to form a semi-enclosed structure, so that if the wire rope (5) detaches during transmission, it can be automatically guided back into the groove of the pulley (10) when the wire rope (5) is tightened.

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