High-safety valve with overload protection structure

Abstract

The high-safety valve with the overload protection structure relates to the field of valves and comprises a valve body and a valve rod arranged at the upper end of the center of the valve body in a penetrating mode, mounting plates are fixedly mounted on the left side and the right side of the valve body, and an adjusting bin is mounted at the upper end of the right side of the valve body in a penetrating mode. An overload protection mechanism is arranged in the adjusting bin and provided with a flow guide pipe, and the flow guide pipe penetrates through the adjusting bin. According to the high-safety valve with the overload protection structure, an assembly for overload protection is arranged, during use, a valve body of the valve is controlled through a valve rod, the valve and a pipeline can be connected through a mounting plate through bolts, when an overload phenomenon occurs in the valve, water flow in the valve is too much, a floating plate is lifted up, and the safety of the valve is improved. And the first pressure relief hole communicates with the second pressure relief hole at the moment until the top of the flow guide pipe makes contact with the supporting piece, the automatic adjusting effect is achieved, and overload protection can be conducted on the valve.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a high-safety valve provided with an overload protection structure. Background Art

[0002] High-safety valves refer to valves with high reliability and safety under various fluid media and working conditions. Such valves are usually used in important or dangerous processes, such as petrochemical, natural gas, nuclear power and other fields;

[0003] In the prior art, when a valve is used for isolation, it is easy to cause impact to the internal parts and damage the internal parts;

[0004] In order to overcome the above-mentioned shortcomings, a Chinese patent of the prior art (publication number CN109578605B) discloses a high-safety valve, in which both sliding joints can slide left and right on the middle box to adjust the distance between the two joint pipes, so that the present invention can be fixed between two pipe openings at different distances; and when the main gate plate is damaged and cannot block the water flow, the two auxiliary gate plates can close the two auxiliary gate plate slots, and then the main gate plate can be repaired, thereby improving the safety of the valve. The sliding joints are provided with two, and the two sliding joints are respectively slidably connected to the left and right ends of the middle box, the adjusting screw assembly is fixedly connected to the lower end of the middle box, and the left and right ends of the adjusting screw assembly are respectively matched with the two sliding joints through threads, the gate assembly is fixedly connected to the upper end of the middle box, and the multiple gate assembly is fixedly connected to the front end of the middle box, and the left and right ends of the multiple gate assembly are respectively fixedly connected to the two sliding joints;

[0005] In order to overcome the above shortcomings, a Chinese patent of the prior art (publication number CN108692040A) discloses a high-safety aluminum valve, including a valve body and a valve ball, wherein a flow channel is provided in the valve body, a conical valve hole matching the valve ball is provided in the middle of the flow channel, a push rod acting on the valve ball is provided on the valve body, an inlet connected to the upper part of the flow channel and an outlet connected to the lower part of the flow channel are provided on the valve body, a spring seat is provided in the outlet, a spring is provided on the spring seat to push the valve ball to seal with the conical valve hole, a through hole is provided on the spring seat, a rotatably connected valve plate is provided at the lower end of the through hole, and a valve stem acting on the valve plate to open is provided under the valve ball. It is intended to provide a high-safety aluminum valve that reduces the leakage of fire extinguishing agent;

[0006] Although the existing technology can overcome the above-mentioned deficiencies, there are still other problems in its operation process, such as: when the water pressure inside the valve is too high, the valve is prone to overload, and the valve that is overloaded for a long time is prone to collapse and cannot automatically perform pressure relief protection. Summary of the invention

[0007] The object of the present invention is to provide a high-safety valve provided with an overload protection structure to solve the problem raised in the above background technology that when the water pressure inside the valve is too high, the valve is prone to overload, and the valve is prone to collapse under overload for a long time and cannot automatically perform pressure relief protection.

[0008] To achieve the above object, the present invention provides the following technical solution: a high-safety valve provided with an overload protection structure, comprising a valve body and a valve stem penetrating the center upper end of the valve body, and mounting plates are fixedly installed on the left and right sides of the valve body;

[0009] The upper right end of the valve body is penetrated with an adjusting chamber, and an overload protection mechanism is provided inside the adjusting chamber, and the overload protection mechanism is provided with a flow guide pipe, and the flow guide pipe is provided through the adjusting chamber;

[0010] A knocking bin is fixedly installed at the center of the front and rear ends of the valve body, and a knocking dredging mechanism is arranged inside the knocking bin, and the knocking dredging mechanism is provided with a limiter, and the inner side of the limiter is fixedly installed on the outer wall of the valve body;

[0011] A pressing chamber is fixedly installed on the upper end of the valve body, and a stress relief mechanism is arranged inside the pressing chamber, and the stress relief mechanism is provided with a sealing air cushion, and the sealing air cushion is fixedly installed on the right side of the mounting plate.

[0012] Furthermore, return springs are fixedly installed on the left and right sides of the inside of the adjustment bin, and a lifting rod is fixedly installed on the lower end of the return spring, and the middle end of the lifting rod passes through the adjustment bin, and a floating plate is fixedly installed on the lower end of the lifting rod.

[0013] Furthermore, the center of the floating plate passes through the guide tube, and an embedded tube is nested inside the upper end of the guide tube, and a support is fixedly installed on the upper end of the embedded tube, and the lower ends of the left and right sides of the support are fixedly installed on the surface of the adjustment bin.

[0014] Furthermore, a rubber sealing sheet is fixedly installed on the inner wall of the lower end of the guide tube, and four rubber sealing sheets are provided, and a first pressure relief hole is opened on the outer side of the upper end of the guide tube, and a second pressure relief hole is opened on the outer side of the lower end of the embedded tube, the positions of the first pressure relief hole and the second pressure relief hole are arranged correspondingly, and the first pressure relief hole is located below the second pressure relief hole.

[0015] Furthermore, a lifting plate is fixedly installed on the left and right sides of the upper end of the guide tube, and an elastic airbag is arranged above the lifting plate, and the upper end of the elastic airbag is fixedly installed on the lower end of the support, and the lifting plate and the elastic airbag form a pressed structure.

[0016] Furthermore, an air guide tube is installed through one side of the air bag, and an air outlet nozzle is installed through the end of the air guide tube, and the air outlet nozzle is located inside the knocking chamber. A one-way air inlet is installed through the other side of the elastic air bag, and a one-way valve is arranged inside the one-way air inlet.

[0017] Furthermore, a striking block is rotatably installed inside the limiting member via a rotating shaft, and an air collecting plate is fixedly installed on the upper end of the striking block, and the position of the air collecting plate corresponds to the output end position of the air outlet, and an exhaust port is opened at the upper outer end of the striking chamber.

[0018] Furthermore, a bidirectional threaded rod is rotatably installed inside the pressing bin, and a gear block is fixedly installed at the middle end of the bidirectional threaded rod, and a tooth plate is meshedly provided on the left side of the gear block, and the left side of the tooth plate is fixedly installed on the outside of the lifting plate.

[0019] Furthermore, a movable block is threadedly installed on the surface of the bidirectional threaded rod, and a limiting rod is installed through the upper end of the movable block, and the outer side of the limiting rod is fixedly installed on the inner wall of the pressing bin.

[0020] Furthermore, an inflatable airbag is fixedly installed inside the pressing chamber, and the position of the inflatable airbag is set corresponding to the movable block, and a connecting hose is installed through the right side of the movable block, and the connecting hose is connected to the inside of the sealing air cushion.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. An overload protection component is provided. When in use, the valve body of the valve is controlled by the valve stem. The mounting plate can connect the valve to the pipeline through bolts. When an overload occurs inside the valve, the water flow inside the valve is too much, which lifts the floating plate until the top of the guide pipe contacts the support. At this time, the first pressure relief hole is connected with the second pressure relief hole, achieving the effect of automatic adjustment, and the valve can be overload protected;

[0023] 2. When the water pressure inside the valve body is too high and pushes up the guide tube, the lifting plates on the left and right sides of the guide tube rise and fall with the rise and fall of the guide tube. When the lifting plates rise, they squeeze the elastic airbag, and the gas inside the elastic airbag is transported to the air outlet through the air guide tube, avoiding damage to the device caused by continuous flow of water when the valve body is blocked;

[0024] 3. When the valve is in use, the mounting plate on the outside of the valve body can be installed on the corresponding pipe by bolts. At this time, with the setting of the sealing air cushion, the installation between the valve and the pipe can be more closely fitted to avoid water leakage;

[0025] Furthermore, when the water pressure inside the valve body is normal, the guide pipe drives the lifting plate to descend, and the descent of the right lifting plate can shift the gear block through the tooth plate, and the gear block drives the two-way threaded rod to rotate. When the sealing air cushion is inflated, it can ensure that the connection between the valve and the pipeline is tight and stable, and it is not easy to shake and detach, and has strong connection stability;

[0026] Furthermore, when the water pressure inside the valve is too high, the guide tube rises to relieve the pressure. At this time, the lifting plate rises along with the rise of the guide tube, thereby slightly loosening the connection between the valve and the pipeline, avoiding a large rigid fixed connection between the pipeline and the valve, and preventing the rigid connection between the pipeline and the valve from being damaged when the water pressure inside the valve is too high, thereby increasing the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0028] Figure 2 It is a rear-view stereoscopic structural schematic diagram of the present invention;

[0029] Figure 3 It is a front perspective structural schematic diagram of the present invention;

[0030] Figure 4 This is a schematic diagram of the three-dimensional structure of the regulating chamber of the present invention in a front cross-sectional view;

[0031] Figure 5 This is a schematic diagram of the three-dimensional structure of the floating plate of the present invention when viewed from above;

[0032] Figure 6 It is a schematic diagram of the cross-sectional three-dimensional structure of the overload protection mechanism of the present invention;

[0033] Figure 7 It is a schematic diagram of the three-dimensional structure of the knocking chamber of the present invention in a side section;

[0034] Figure 8 It is a schematic diagram of the three-dimensional structure of the knocking and dredging mechanism of the present invention;

[0035] Fig. 9 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0036] Fig.10 It is a schematic diagram of the three-dimensional structure of the pressing chamber of the present invention.

[0037] In the figure: 1. valve body; 2. valve stem; 3. mounting plate; 4. adjusting chamber; 5. reset spring; 6. lifting rod; 7. floating plate; 8. guide tube; 9. embedded tube; 10. support member; 11. rubber sealing sheet; 12. first pressure relief hole; 13. second pressure relief hole; 14. lifting plate; 15. elastic air bag; 16. air guide tube; 17. air outlet; 18. knocking chamber; 19. exhaust port; 20. limit member; 21. knocking block; 22. air collecting plate; 23. one-way air inlet; 24. pressing chamber; 25. two-way threaded rod; 26. gear block; 27. tooth plate; 28. movable block; 29. ​​limit rod; 30. inflatable air bag; 31. connecting hose; 32. sealing air cushion. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Embodiment 1:

[0040] like Figure 1-Figure 6 The technical solution shown, in order to solve the problem that the valve cannot automatically release pressure and is easy to collapse when overloaded, discloses: a valve body 1 and a valve stem 2 is arranged through the center upper end of the valve body 1, and mounting plates 3 are fixedly installed on the left and right sides of the valve body 1, an adjusting chamber 4 is arranged through the right upper end of the valve body 1, and an overload protection mechanism is arranged inside the adjusting chamber 4, and the overload protection mechanism is provided with a guide pipe 8, and the guide pipe 8 is arranged through the adjusting chamber 4, and a return spring 5 is fixedly installed on the left and right sides of the adjusting chamber 4, and a lifting rod 6 is fixedly installed at the lower end of the return spring 5, and the middle end of the lifting rod 6 is arranged through the adjusting chamber 4, and the lower end of the lifting rod 6 A floating plate 7 is fixedly installed, the center of the floating plate 7 passes through the guide tube 8, and an embedded tube 9 is nested inside the upper end of the guide tube 8, and a support member 10 is fixedly installed on the upper end of the embedded tube 9, and the lower ends of the left and right sides of the support member 10 are fixedly installed on the surface of the regulating chamber 4, a rubber sealing sheet 11 is fixedly installed on the inner wall of the lower end of the guide tube 8, and four rubber sealing sheets 11 are provided, and a first pressure relief hole 12 is opened on the outer side of the upper end of the guide tube 8, and a second pressure relief hole 13 is opened on the outer side of the lower end of the embedded tube 9, the positions of the first pressure relief hole 12 and the second pressure relief hole 13 are correspondingly arranged, and the first pressure relief hole 12 is located below the second pressure relief hole 13;

[0041] In the embodiment, an overload protection component is provided. When in use, the valve body 1 of the valve is controlled by the valve stem 2, and the mounting plate 3 can connect the valve to the pipeline through bolts. When an overload phenomenon occurs inside the valve, the water flow inside the valve is too much, which lifts the floating plate 7. The floating plate 7 moves upward and squeezes the reset spring 5 through the lifting rod 6. At the same time, the guide pipe 8 passes through the regulating chamber 4 upward as the floating plate 7 rises, until the top of the guide pipe 8 contacts the support 10. At this time, the first pressure relief hole 12 is connected with the second pressure relief hole 13, and the water flow inside the valve pushes The rubber sealing sheet 11 can be discharged from the inside of the valve to achieve the effect of automatic pressure relief, avoiding the valve from being damaged by overload inside the valve. When the water pressure inside the valve body 1 becomes smaller, the water level inside the valve body 1 drops. At this time, the floating plate 7 loses the buoyancy of the water flow, and the reset spring 5 pushes the lifting rod 6 and the floating plate 7 down through its own elastic force. The guide tube 8 goes along the inside of the regulating chamber 4, so that the second pressure relief hole 13 on the surface of the embedded tube 9 and the first pressure relief hole 12 on the surface of the guide tube 8 are staggered to avoid water leakage, achieve the effect of automatic adjustment, and protect the valve from overload.

[0042] Embodiment 2:

[0043] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 The technical solution shown in the figure, in order to solve the problem that valve blockage easily causes blockage and water flow accumulation overload, discloses: a knocking bin 18 is fixedly installed at the center of the front and rear ends of the valve body 1, and a knocking dredging mechanism is arranged inside the knocking bin 18, and the knocking dredging mechanism is provided with a limiter 20, and the inner side of the limiter 20 is fixedly installed on the outer wall of the valve body 1, and a lifting plate 14 is fixedly installed on the left and right sides of the upper end of the guide tube 8, and an elastic airbag 15 is arranged above the lifting plate 14, and the upper end of the elastic airbag 15 is fixedly installed at the lower end of the support member 10, and the lifting plate 14 and the elastic airbag are fixedly installed. 15 forms a pressed structure, an air guide tube 16 is installed through one side of the elastic air bag 15, and an air outlet nozzle 17 is installed through the end of the air guide tube 16, and the air outlet nozzle 17 is located inside the knocking bin 18, a one-way air inlet 23 is installed through the other side of the elastic air bag 15, and a one-way valve is arranged inside the one-way air inlet 23, a knocking block 21 is installed inside the limiter 20 through a rotating shaft, and an air collecting plate 22 is fixedly installed on the upper end of the knocking block 21, and the position of the air collecting plate 22 corresponds to the output end position of the air outlet nozzle 17, and an exhaust port 19 is opened at the upper end of the outer side of the knocking bin 18;

[0044] In the embodiment, when the water pressure inside the valve body 1 is too large to push up the guide tube 8, the lifting plates 14 on the left and right sides of the guide tube 8 are lifted and lowered following the lifting of the guide tube 8. When the lifting plates 14 rise, the lifting plates 14 squeeze the elastic airbag 15, and the gas inside the elastic airbag 15 is transported to the air outlet nozzle 17 through the air guide tube 16. The air outlet nozzle 17 is aimed at the surface of the air collecting plate 22 inside the knocking bin 18. With the gas blown out of the air outlet nozzle 17, the knocking block 21 at the lower end of the air collecting plate 22 is blown to swing back and forth along with the inside of the limiter 20 under the setting of the rotating shaft. At this time, the bottom of the knocking block 21 is aimed at the valve body 1 to knock, and the gas blown out of the air outlet nozzle 17 is blown out. The exhaust port 19 discharges water. At this time, when the pressure inside the valve body 1 is too high or the valve body 1 is blocked and water accumulates, the center of the valve body 1 can be automatically knocked to avoid overloading of the valve body 1 caused by blockage. When it is blocked, it can automatically dredge and release pressure to avoid damage to the device caused by continuous flow of water in the valve body 1 when it is blocked. When the water pressure inside the valve returns to normal, the guide tube 8 drops. At this time, the lifting plate 14 stops squeezing the elastic airbag 15, and the elastic airbag 15 expands and resets by its own elastic force. At the same time, the one-way air inlet 23 on the other side of the elastic airbag 15 is connected to the one-way valve inside to inhale air to achieve the effect of re-inflation.

[0045] Embodiment three:

[0046] like Figure 1 , Figure 2 , Fig. 9 and Fig.10 The technical solution shown in the figure, in order to solve the problem that the valve is easily damaged under the impact of overload water flow due to too tight installation, discloses: a pressing chamber 24 is fixedly installed on the upper end of the valve body 1, and a stress relief mechanism is arranged inside the pressing chamber 24, and the stress relief mechanism is provided with a sealing air cushion 32, and the sealing air cushion 32 is fixedly installed on the right side of the mounting plate 3, a two-way threaded rod 25 is rotatably installed inside the pressing chamber 24, and a gear block 26 is fixedly installed at the middle end of the two-way threaded rod 25, and a gear block 26 is meshed with a gear block 26 on the left side. The tooth plate 27 is fixedly mounted on the outer side of the lifting plate 14, and the left side of the tooth plate 27 is fixedly mounted on the outer side of the lifting plate 14, a movable block 28 is threadedly mounted on the surface of the bidirectional threaded rod 25, and a limit rod 29 is installed through the upper end of the movable block 28, and the outer side of the limit rod 29 is fixedly mounted on the inner wall of the pressing chamber 24, an inflatable airbag 30 is fixedly mounted inside the pressing chamber 24, and the position of the inflatable airbag 30 is set corresponding to the movable block 28, and a connecting hose 31 is installed through the right side of the movable block 28, and the connecting hose 31 is connected to the inside of the sealing air cushion 32;

[0047] In the embodiment, when the valve is in use, the mounting plate 3 on the outside of the valve body 1 can be mounted on the corresponding pipe by bolts. At this time, with the setting of the sealing air cushion 32, the installation between the valve and the pipe can be more closely fitted to avoid water leakage. When the water pressure inside the valve body 1 is normal, the guide pipe 8 drives the lifting plate 14 to descend. The descent of the right lifting plate 14 can shift the gear block 26 through the tooth plate 27. The gear block 26 drives the two-way threaded rod 25 to rotate. The rotation of the two-way threaded rod 25 can be set with the setting of the two-way threaded rod 25. The movable block 28 threadedly connected on its surface can move outward along the pressing chamber 24 at the same time when the limit rod 29 is limited. When the movable block 28 moves outward, it can squeeze the inflatable airbag 30. The inflatable airbag 30 is squeezed to transport the internal air to the sealing airbag 32 through the connecting hose 31. The sealing airbag 32 can be kept in the inflated state. The invention can ensure that the connection between the valve and the pipeline is tight and stable, and is not easy to shake and detach, and has strong connection stability. When the water pressure inside the valve is too high, the guide tube 8 rises to relieve the pressure. At this time, the lifting plate 14 rises with the rise of the guide tube 8. At this time, the tooth plate 27 set at the right end of the right lifting plate 14 rises and moves, driving the gear block 26 meshing with it to reverse. When the gear block 26 reverses, it drives the two-way threaded rod 25 to reverse. Therefore, the movable block 28 threadedly connected on the surface of the two-way threaded rod 25 moves inward under the setting of the limit rod 29 to stop squeezing the inflatable airbag 30. The inflatable airbag 30 stops being squeezed so that the air inside the sealing air cushion 32 is transported back to the inflatable airbag 30 through the connecting hose 31, thereby slightly loosening the connection between the valve and the pipeline, avoiding a large rigid fixed connection between the pipeline and the valve, and preventing the connection between the rigidly connected pipeline and the valve from being damaged when the water pressure inside the valve is too high, thereby improving the service life of the device.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-safety valve provided with an overload protection structure, comprising a valve body (1) and a valve stem (2) penetrating the center upper end of the valve body (1), and mounting plates (3) fixedly mounted on the left and right sides of the valve body (1); Features: An adjusting chamber (4) is installed through the upper right end of the valve body (1), an overload protection mechanism is provided inside the adjusting chamber (4), and the overload protection mechanism is provided with a flow guide pipe (8), and the flow guide pipe (8) is provided through the adjusting chamber (4); A knocking bin (18) is fixedly mounted at the center of the front and rear ends of the valve body (1), and a knocking dredging mechanism is arranged inside the knocking bin (18), and the knocking dredging mechanism is provided with a limiter (20), and the inner side of the limiter (20) is fixedly mounted on the outer wall of the valve body (1); A pressing chamber (24) is fixedly mounted on the upper end of the valve body (1), a stress relief mechanism is arranged inside the pressing chamber (24), and a sealing air cushion (32) is arranged in the stress relief mechanism, and the sealing air cushion (32) is fixedly mounted on the right side of the mounting plate (3).

2. A high-safety valve provided with an overload protection structure according to claim 1, characterized in that: The left and right sides of the adjusting chamber (4) are fixedly mounted with return springs (5), and the lower end of the return springs (5) is fixedly mounted with a lifting rod (6), and the middle end of the lifting rod (6) passes through the adjusting chamber (4), and the lower end of the lifting rod (6) is fixedly mounted with a floating plate (7).

3. A high-safety valve provided with an overload protection structure according to claim 2, characterized in that: The center of the floating plate (7) passes through a guide tube (8), and an embedded tube (9) is nested inside the upper end of the guide tube (8), and a support member (10) is fixedly installed on the upper end of the embedded tube (9), and the lower ends of the left and right sides of the support member (10) are fixedly installed on the surface of the regulating chamber (4).

4. A high-safety valve provided with an overload protection structure according to claim 3, characterized in that: A rubber sealing sheet (11) is fixedly mounted on the inner wall of the lower end of the guide tube (8), and four rubber sealing sheets (11) are provided. A first pressure relief hole (12) is provided on the outer side of the upper end of the guide tube (8), and a second pressure relief hole (13) is provided on the outer side of the lower end of the embedded tube (9). The positions of the first pressure relief hole (12) and the second pressure relief hole (13) are correspondingly arranged, and the first pressure relief hole (12) is located below the second pressure relief hole (13).

5. A high-safety valve provided with an overload protection structure according to claim 1, characterized in that: A lifting plate (14) is fixedly mounted on the left and right sides of the upper end of the guide tube (8), and an elastic airbag (15) is arranged above the lifting plate (14), and the upper end of the elastic airbag (15) is fixedly mounted on the lower end of the support member (10), and the lifting plate (14) and the elastic airbag (15) form a pressed structure.

6. A high-safety valve provided with an overload protection structure according to claim 5, characterized in that: An air guide tube (16) is installed through one side of the elastic air bag (15), and an air outlet nozzle (17) is installed through the end of the air guide tube (16), and the air outlet nozzle (17) is located inside the knocking chamber (18); a one-way air inlet (23) is installed through the other side of the elastic air bag (15), and a one-way valve is arranged inside the one-way air inlet (23).

7. A high-safety valve provided with an overload protection structure according to claim 6, characterized in that: A striking block (21) is rotatably mounted inside the stopper (20) via a rotating shaft, and an air collecting plate (22) is fixedly mounted on the upper end of the striking block (21), and the position of the air collecting plate (22) corresponds to the position of the output end of the air outlet nozzle (17), and an exhaust port (19) is provided at the upper end of the outer side of the striking chamber (18).

8. A high-safety valve provided with an overload protection structure according to claim 1, characterized in that: A bidirectional threaded rod (25) is rotatably mounted inside the pressing bin (24), a gear block (26) is fixedly mounted at the middle end of the bidirectional threaded rod (25), a toothed plate (27) is meshedly mounted on the left side of the gear block (26), and the left side of the toothed plate (27) is fixedly mounted on the outer side of the lifting plate (14).

9. A high-safety valve provided with an overload protection structure according to claim 8, characterized in that: A movable block (28) is threadedly mounted on the surface of the bidirectional threaded rod (25), and a limiting rod (29) is installed through the upper end of the movable block (28), and the outer side of the limiting rod (29) is fixedly mounted on the inner wall of the pressing bin (24).

10. A high-safety valve provided with an overload protection structure according to claim 9, characterized in that: An inflatable airbag (30) is fixedly installed inside the pressing chamber (24), and the position of the inflatable airbag (30) is arranged corresponding to the movable block (28). A connecting hose (31) is installed through the right side of the movable block (28), and the connecting hose (31) is connected to the inside of the sealing air cushion (32).

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