Surface-front copper gate valve with magnetic lockable structure

Abstract

The invention relates to the technical field of gate valve equipment, and discloses a meter-front copper gate valve with a magnetic lockable structure, which comprises a valve body which is used as a basic component of the whole device and is used for assembling and bearing all mechanisms and subordinate lower structural parts; the valve basic mechanism is arranged on the valve body and used for being matched with other structural parts to execute basic operation treatment of the valve; and the locking protection mechanism is arranged at the upper part of the valve body. By adding and arranging an extreme protection mechanism, under the extreme working condition, a thermosensitive alloy sleeve of the mechanism expands in a high-temperature environment to push a locking pin rod to be inserted into a valve rod locking hole, a valve rod is mechanically locked, and fluid leakage caused by high-temperature damage of the valve under the extreme conditions such as a fire disaster is prevented; after the temperature is reduced, the pin rod is automatically reset, locking is relieved, follow-up normal operation is not affected, the valve body can be actively protected under the extreme working condition through the treatment mode, and the accident risk is prevented from being increased due to valve failure.

Description

Technical Field

[0001] The invention relates to the technical field of gate valve equipment, in particular to a front-end copper gate valve with a magnetic lockable structure. Background Art

[0002] A gate valve is a common shut-off valve that controls the flow of fluid by raising and lowering the gate disc. The gate disc is perpendicular to the direction of fluid flow, and the sealing surface can be made into a flat or conical surface. It has the characteristics of simple structure, easy manufacturing and maintenance. When the gate valve is closed, the sealing surface can completely block the flow of the medium; when it is open, the channel is completely unobstructed and the fluid resistance is low. It is suitable for piping systems of various pressures and temperatures, especially in situations where it is necessary to completely shut off the medium, such as tap water pipelines and petrochemical pipelines. There are many types of gate valves. According to the sealing surface configuration, they can be divided into wedge gate valves and parallel gate valves. According to the thread position of the valve stem, they can be divided into rising stem gate valves and non-rising stem gate valves. Different types of gate valves have their own characteristics in terms of usage scenarios and performance, and can be selected according to actual needs.

[0003] In the field of pipeline engineering, gate valves are a type of vital valve component that regulates the on / off state of the fluid in the pipeline by raising and lowering the gate plate. A concealed stem gate valve is also a common type of gate valve. However, when the gate valve is in a long-term high-pressure working environment, the rubber seal on the valve plate is very prone to aging and wear. At the same time, the water hammer effect inside the pipeline and the continuous high-pressure impact inside the pipeline will continuously squeeze the seal, causing its elasticity to gradually decay. At the same time, the scouring of the fluid will also aggravate the loss of the sealing surface. Once the seal fails, leakage will occur inside the pipeline, which may not only cause waste of the medium, but also cause safety hazards. For example, when transporting flammable and corrosive media, leakage may even lead to serious consequences such as fire and equipment corrosion. Therefore, those skilled in the art have proposed a copper gate valve with a magnetic lockable structure to solve the above-mentioned technical problems. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a copper gate valve with a magnetic lockable structure, which solves the problem that the sealing part of the gate valve is easily aged after long-term use, thereby causing liquid leakage.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a copper gate valve with a magnetic lockable structure, comprising The valve body, as the basic component of the entire device, is used to assemble and carry various mechanisms and their subordinate structural parts; The valve basic mechanism is arranged on the valve body and is used to cooperate with other structural parts to perform basic valve operations; A locking and protection mechanism is provided on the upper part of the valve body and is used to lock and protect the gate valve before or after use; The compensating sealing mechanism is arranged inside the valve body and is used to perform magnetic self-compensating sealing on the gate valve during use; The extreme protection mechanism is arranged on the top of the valve body and is used for protection and prevention in extreme conditions of gate valve handling.

[0006] Preferably, the valve basic mechanism includes a valve cover, the four corners of the top of the valve body are connected to the valve cover by connecting bolts, a packing sleeve is provided in the middle of the top of the valve cover, a packing pressure plate is provided in the middle of the top of the packing pressure sleeve, the packing pressure plate and the two sides of the middle of the packing pressure sleeve are connected by connecting bolts, a handwheel is provided on the top of the packing pressure plate, and a pressure cover is provided on the top of the handwheel.

[0007] Preferably, the valve basic mechanism also includes a valve seat, valve seats are provided on both sides of the middle part of the valve body, a gate plate is provided on the inner middle part of the valve body, a valve stem is provided on the top of the gate plate, and the bottom of the valve stem is connected to the middle part of the top end of the gate plate, and the top end of the valve stem passes through the valve cover, packing sleeve, packing pressure plate, limit placement sleeve and pressure cover in sequence and extends upward.

[0008] Preferably, the locking protection mechanism includes a mounting seat, a mounting seat is provided in the middle of the filler pressure plate, movable guide grooves are provided on both sides of the inner wall of the mounting seat, two mirror-imaged U-shaped seats are slidably connected between the movable guide grooves on both sides, a plurality of limit strip seats are equidistantly provided on the arc-shaped wall in the middle of one adjacent side of the U-shaped seat, and a magnetic attraction layer is provided on the surface of one adjacent side of the U-shaped seat.

[0009] Preferably, the locking protection mechanism also includes an electromagnet, and electromagnets are provided near the edges on both sides of the interior of the mounting seat. A control sensor is provided in the middle of the side of the electromagnet away from the U-shaped seat, which is used to adjust the magnetic change of the electromagnet. A magnetic seat is provided in the middle of the side away from the U-shaped seat, and the magnetic seat and the middle of the electromagnet on the same side are connected through an adjusting spring, and a limited position placement sleeve is provided in the middle of both sides of the outer wall of the mounting seat.

[0010] Preferably, the compensating sealing mechanism includes an annular cavity, an annular cavity is opened on the middle side of the inside of the valve body, an annular permanent magnet is provided on the inner side of the annular cavity away from the gate plate, and the N pole of the annular permanent magnet faces the gate plate, and a silicone rubber elastic gasket is provided on the outer wall side of the annular permanent magnet away from the gate plate, and a plurality of adjusting bolts are arranged in a circular array on the outer side of the valve body close to the annular cavity, and the ends of the adjusting bolts all pass through the valve body and contact the surface of the silicone rubber elastic gasket.

[0011] Preferably, the compensating sealing mechanism also includes a soft magnetic alloy sheet, and the soft magnetic alloy sheets are connected to the surfaces of both sides of the gate plate by countersunk screws. The surfaces of the soft magnetic alloy sheets are hard chrome plated, and V-shaped rubber sealing rings are embedded in the dovetail grooves on the edges of the gate plate sealing surfaces, and the V-shaped rubber sealing rings form initial contact with the sealing surface of the valve seat.

[0012] Preferably, the extreme protection mechanism includes a locking cap, a locking cap is provided on the top of the pressure cover, a plurality of pin slides are arranged in a circumferential array on the top of the locking cap, a locking pin rod is slidably connected to the inside of the pin slide, a plurality of locking holes are arranged in a circumferential array around the top of the valve stem, a compression spring is provided in the middle and upper part of the inner wall of the pin slide, and one end of the compression spring is respectively connected to the corresponding position of the inner wall of the pin slide, and the other end of the compression spring is respectively connected to the corresponding position of the top of the locking pin rod.

[0013] Preferably, the extreme protection mechanism also includes a thermosensitive alloy sleeve, which is provided on the pressure cover, and a plurality of raised seats are arranged in a circular array on the top of the inner wall of the thermosensitive alloy sleeve, and the positions of the raised seats correspond to the positions of the pin slides on the lock cap, and a plurality of memory alloy wires are arranged in a circular array on the top of the inner wall of the thermosensitive alloy sleeve, and one end of the memory alloy wire is connected to the corresponding position of the thermosensitive alloy sleeve, and the other end of the memory alloy wire is connected to the top of the corresponding locking pin rod.

[0014] Working principle: When the copper gate valve is used daily, the valve basic mechanism is started first. When the staff needs to open the gate valve on the pipeline, the staff manually turns the handwheel. The handwheel drives the valve stem in the gland to rotate synchronously while the handwheel is rotating. The valve stem moves upward synchronously while the lower half of the valve stem moves upward, and the gate plate in the valve body moves upward synchronously. After the gate plate moves upward, the fluid at both ends of the valve seat is in a conductive state. At this time, the fluid in the pipeline can flow through the pipeline in the valve body, thereby completing the conduction adjustment of the gate valve. When the staff When the gate valve on the pipeline needs to be closed, the staff manually turns the handwheel. When the handwheel is turned, the valve stem in the gland is driven to rotate synchronously. The valve stem is driven to rotate and the lower half of the valve stem, which was originally moved upward and retracted, is synchronously moved downward and reset. When the lower half of the valve stem is moved downward and reset, it also synchronously drives the bottom gate plate to move downward and reset in the valve body and valve cover. After the gate plate is completely reset, the fluid at both ends of the pipeline is cut off by the gate plate, so that the fluid at both ends of the valve seat is in a closed and cut-off state, thereby completing the interception of the fluid inside the pipeline, thereby completing the basic opening and closing processing of the gate valve during use;After the staff opens or closes the gate valve on the pipeline, in order to prevent other non-staff from misoperating, the locking protection mechanism is activated. After the staff completes the operation of the gate valve on the pipeline, in order to prevent other non-staff from misoperating, the staff first sends a control signal to the control sensor in the mounting seat through the control device. After receiving the control signal, the control sensor controls the electromagnet in the mounting seat to energize and complete the conversion of the magnetic pole, so that the magnetism of the electromagnet and the magnetic seat on the U-shaped seat are the same, and the magnets of the same pole repel the opposite poles. The U-shaped seat is in a fixed position, and the magnetic attraction between the electromagnet and the magnetic seat is a key factor influencing the valve stem. The U-shaped seat is in a fixed position, and the magnetic attraction between the electromagnet and the magnetic seat is a key factor influencing the valve stem. The U-shaped seat is in a fixed position, and the magnetic attraction between the electromagnet and the magnetic seat is a key factor influencing the valve stem. The U-shaped seat is in a fixed position, and the magnetic attraction between the electromagnet and the magnetic seat is a key factor influencing the valve stem. It fits tightly with the outer wall surface of the valve stem to limit the valve stem to prevent other non-staff from operating it incorrectly. When the staff needs to operate the gate valve, the staff sends a control signal through the control sensor on the electromagnet of the control equipment box. After receiving the control signal, the control sensor controls the electromagnet in the mounting seat to energize and complete the transformation of the magnetic pole, so that the magnetic pole of the electromagnet after the transformation is completed is opposite to the magnetic pole of the magnetic seat on the U-shaped seat. According to the principle that like magnets repel and opposite magnets attract, the magnetic attraction generated between the electromagnet and the magnetic seat drives the U-shaped seat in the movable guide groove to move synchronously to the edges on both sides. At the same time, the staff places a strong magnetic block of a fixed specific shape in the limiting placement sleeve, and separates the two U-shaped seats in the mounting seat through the magnetic attraction generated by the strong magnetic block and the electromagnet and the magnetic seat, and simultaneously compresses the adjusting spring in the mounting seat through the magnetic attraction generated by the two, thereby limiting the two U-shaped seats in the mounting seat to prevent them from resetting and moving, so that subsequent staff can operate the gate valve, thereby completing the protection of the gate valve during use;When the gate valve has been used for a period of time and the rubber seal inside the gate valve is aged and worn, the compensating sealing mechanism is activated. When the gate in the valve body is in the closed state, the soft magnetic alloy sheet on the gate plate is tightly attached to the valve seat in the valve body under the influence and action of the magnetic attraction of the annular permanent magnet in the annular cavity, and at the same time, the lip of the V-shaped rubber sealing ring on the gate plate is elastically deformed, thereby forming a double sealing interface in the valve body. When the sealing surface on the valve seat and the seal produce gaps due to wear and aging after long-term use, the air gap between the annular permanent magnet in the annular cavity and the soft magnetic alloy sheet on the gate plate increases, the suction force decreases, triggering the adjusting bolt on the valve body to push the valve seat to expand slightly through the medium pressure in the valve body. The slightly expanded adjusting bolt squeezes the annular permanent magnet on the silicone rubber elastic gasket to produce deformation while performing automatic fine-tuning, and also synchronously moves the soft magnetic alloy sheet toward the valve seat, thereby aligning the annular permanent magnet and the soft magnetic alloy sheet. The magnetic attraction between the alloy sheets is restored, and the sealing condition inside the gate valve is restored synchronously at the same time. When the gate valve is used in high-pressure working conditions, the pre-tightening force of the adjusting bolt on the valve body is increased, so that the end of the adjusting bolt pushes the annular permanent magnet in the annular cavity. At this time, the distance between the annular permanent magnet and the soft magnetic alloy sheet on the gate plate is reduced, and the magnetic adsorption force of the annular cavity on the gate plate and the soft magnetic alloy sheet on the gate plate in the valve body is increased, thereby offsetting the pushing force of the medium pressure on the sealing surface on the valve seat. When the gate valve is used in low-pressure working conditions, the staff resets the adjusting bolt on the valve body, and the adjusting bolt after reset also synchronously drives the annular permanent magnet in the annular cavity to reset. After resetting, the magnetic attraction between the annular permanent magnet and the soft magnetic alloy sheet on the gate plate automatically decreases, thereby avoiding the gate plate from locking, thereby completing the compensation and sealing treatment of the gate valve during use;When facing extreme high temperature conditions such as fire, the extreme protection mechanism is activated. When the gate valve is at normal temperature, the locking pin in the pin slide is in the initial position, and the compression spring in the pin slide is in a contracted state, and the length of the memory alloy wire in the thermal alloy sleeve maintains the initial length. When the gate valve is in an extreme high temperature environment, the ambient temperature is close to the Curie temperature, and the thermal alloy sleeve on the lock cap expands due to the high temperature. While expanding, the thermal alloy sleeve drives the raised seat therein to move downward synchronously and enter the pin slide in the lock cap. The raised seat entering the pin slide pushes the locking pin in the pin slide to move downward. After moving downward, the locking pin enters the locking hole at the top of the valve stem, thereby limiting and locking the valve stem. At the same time, when the locking pin moves downward, the compression spring in the pin slide The spring is pulled from a contracted state to a stretched state by the locking pin, and the length of the memory alloy wire in the thermal alloy sleeve also increases synchronously due to the high temperature. Through the above operation, the valve stem is limited and fixed, thus completing the self-protection of the valve body in extreme high-temperature environments such as fire. After the high temperature ends, the temperature of the external environment drops, and the length of the memory alloy wire in the thermal alloy sleeve shrinks and resets. The memory alloy wire pulls the locking pin in the pin slideway upward and resets while resetting. At the same time, the compressed spring in the stretched state in the pin slideway assists, so that the locking pin in the pin slideway is discharged from the locking hole on the valve stem, thereby releasing the self-protection of the gate valve. The staff can then manually adjust the gate valve, thereby completing the self-protection of the gate valve in extreme high-temperature environments.

[0015] The present invention provides a copper gate valve with a magnetic lockable structure. It has the following beneficial effects: 1. The present invention adds and sets a valve basic mechanism. When the gate valve is in use, the mechanism drives the valve stem to drive the gate plate to rise and fall through the handwheel to realize fluid on-off control. The operation logic conforms to human habits and is convenient for daily opening and closing maintenance. When the gate plate is fully open, the channel is completely unobstructed and the fluid resistance is small. When it is fully closed, the sealing surface can completely block the flow of the medium, which is suitable for scenes where the medium needs to be cut off, such as tap water pipes. Moreover, the overall device structure is simple, and the various components are connected by bolts, which are easy to disassemble and maintain. The linkage design of the valve stem and the gate plate ensures the stability of the opening and closing state, reducing the risk of failure caused by loose components.

[0016] 2. The present invention adds and sets a locking protection mechanism. When the gate valve is in use, the mechanism uses the mutual repulsion and attraction principle of the magnetic poles of the electromagnet and the magnetic seat to drive the U-shaped seat to slide, and cooperates with the use of the limit bar seat to lock the valve stem, thereby preventing unauthorized operation. Moreover, this magnetically driven locking method does not require additional tools, and can be remotely or locally triggered to unlock through a control signal, taking into account both anti-theft and operational convenience. When the spring is adjusted and the magnetic layer is cooperated, the limit bar seat and the valve stem are tightly fitted in the locked state to avoid locking failure caused by vibration. At the same time, the structure is integrated in the mounting seat, does not increase the external dimensions of the valve body, and is adapted to the existing pipeline installation space.

[0017] 3. The present invention adds and sets a compensating sealing mechanism. When the gate valve is in use, the mechanism forms a double seal with the help of the magnetic adsorption of the annular permanent magnet and the soft magnetic alloy sheet in combination with the V-shaped rubber sealing ring. When the seal is worn, the magnetic force automatically compensates for the gap to maintain the sealing effect. The adjusting bolt can dynamically adjust the magnetic force according to the medium pressure. At high pressure, the adsorption force is enhanced to offset the pushing force, and at low pressure, the suction force is reduced to avoid the gate plate from locking. This solves the problem of aging and leakage of traditional seals, reduces medium waste and safety hazards caused by sealing failure, and also reduces the water hammer effect inside the pipeline and the loss of the sealing surface and seals by the internal fluid, thereby extending the service life of the valve.

[0018] 4. The present invention adds and sets an extreme protection mechanism. When facing extreme working conditions, the mechanism expands the thermally sensitive alloy sleeve in a high-temperature environment to push the locking pin rod into the valve stem locking hole, mechanically locking the valve stem to prevent the valve from being damaged by high temperature and causing fluid leakage in extreme situations such as fire. Then, the memory alloy wire cooperates with the compression spring to automatically reset the pin rod after the temperature drops, releasing the lock without affecting subsequent normal operations. This processing method can actively protect the valve body under extreme working conditions, avoid the risk of accidents due to valve failure, and at the same time has a self-recovery function to reduce post-disaster maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the front structure of the present invention; Figure 2 It is a schematic diagram of the rear structure of the present invention; Figure 3 It is a schematic cross-sectional view of a local structure of the overall device of the present invention; Figure 4 It is a cross-sectional schematic diagram of the internal structure of the mounting base of the present invention; Figure 5 It is a schematic diagram of the U-shaped seat structure of the present invention; Figure 6 It is a cross-sectional schematic diagram of the internal structure of the valve body of the present invention; Figure 7 It is a schematic diagram of the local structure of the gate of the present invention; Figure 8 It is a cross-sectional schematic diagram of the internal structure of the lock cap of the present invention; Figure 9 This is a schematic diagram of the internal structure of the heat-sensitive alloy sleeve of the present invention; Figure 10 It is a schematic diagram of the local structure of the valve stem of the present invention.

[0020] Among them, 1. Valve body; 2. Valve cover; 3. Packing pressure plate; 4. Pressure cover; 5. Thermal alloy sleeve; 6. Handwheel; 7. Mounting seat; 8. Packing pressure sleeve; 9. Adjusting bolt; 10. Limit placement sleeve; 11. Gate; 12. Valve seat; 13. Soft magnetic alloy sheet; 14. V-type rubber sealing ring; 15. Valve stem; 16. Control sensor; 17. Electromagnet; 18. U-shaped seat; 19. Limit bar seat; 20. Movable guide groove; 21. Adjusting spring; 22. Magnetic attraction layer; 23. Annular cavity; 24. Annular permanent magnet; 25. Silicone rubber elastic gasket; 26. Locking cap; 27. Pin slideway; 28. Locking pin; 29. ​​Compression spring; 30. Memory alloy wire; 31. Raised seat; 32. Locking hole; 33. Magnetic seat. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings 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 making creative efforts are within the scope of protection of the present invention.

[0022] Please see the attached Figure 1 -Attached Figure 3 The embodiment of the present invention provides a copper gate valve with a magnetic lockable structure, comprising a valve body 1, which serves as the basic component of the overall device and is used to assemble and carry various mechanisms and their subordinate structural parts; Please see the attached Figure 2 -Attached Figure 3 , the valve basic mechanism, which is arranged on the valve body 1, is used to cooperate with other structural parts to perform basic operation processing of the valve; The valve basic mechanism includes a valve cover 2, and the valve cover 2 is connected to the four corners of the top of the valve body 1 by connecting bolts. A packing sleeve 8 is provided in the middle of the top of the valve cover 2, and a packing pressure plate 3 is provided in the middle of the top of the packing pressure sleeve 8. The packing pressure plate 3 and the two sides of the middle of the packing pressure sleeve 8 are connected by connecting bolts. A handwheel 6 is provided on the top of the packing pressure plate 3, and a pressure cover 4 is provided on the top of the handwheel 6.

[0023] When the valve basic mechanism is started, when the staff needs to open the gate valve on the pipeline, the staff manually turns the handwheel 6, and the handwheel 6 drives the valve stem 15 in the pressure cover 4 to rotate synchronously while rotating. The valve stem 15 is driven to rotate and its lower half moves upward synchronously. When the lower half of the valve stem 15 moves upward, it also drives the gate plate 11 in the valve body 1 to move upward synchronously. After the gate plate 11 moves upward, the fluid at both ends of the valve seat 12 is in a conductive state. At this time, the fluid in the pipeline can flow through the pipeline in the valve body 1, thereby completing the conduction adjustment of the gate valve.

[0024] The valve basic mechanism also includes a valve seat 12. Valve seats 12 are provided on both sides of the middle of the valve body 1. A gate plate 11 is provided in the middle of the inner side of the valve body 1. A valve stem 15 is provided on the top of the gate plate 11, and the bottom of the valve stem 15 is connected to the middle of the top of the gate plate 11. The top of the valve stem 15 passes through the valve cover 2, the packing sleeve 8, the packing pressure plate 3, the limit placement sleeve 10 and the pressure cover 4 in sequence and extends upward.

[0025] When the staff needs to close the gate valve on the pipeline, the staff manually turns the handwheel 6. While the handwheel 6 is rotating, it drives the valve stem 15 in the pressure cover 4 to rotate synchronously. While the valve stem 15 is driven to rotate, the lower half of the valve stem 15, which was originally moved upward and contracted, is synchronously moved downward and reset. While the lower half of the valve stem 15 is moved downward and reset, it also synchronously drives its bottom gate plate 11 to move downward and reset in the valve body 1 and the valve cover 2. After the gate plate 11 is completely reset, the fluid at both ends of the pipeline is cut off by the gate plate 11, so that the fluid at both ends of the valve seat 12 is in a closed and cut-off state, thereby completing the interception of the fluid inside the pipeline, thereby completing the basic opening and closing processing of the gate valve during use.

[0026] Please see the attached Figure 4 -Attached Figure 5 , a locking and protection mechanism, which is arranged on the upper part of the valve body 1, is used to lock and protect the gate valve before or after use; The locking protection mechanism includes a mounting seat 7, and a mounting seat 7 is provided in the middle of the filler pressure plate 3. Moving guide grooves 20 are provided on both sides of the inner wall of the mounting seat 7. Two mirror-image U-shaped seats 18 are slidably connected between the moving guide grooves 20 on both sides. A plurality of limit strip seats 19 are equidistantly provided on the arc-shaped wall in the middle of the adjacent side of the U-shaped seat 18, and a magnetic attraction layer 22 is provided on the surface of the adjacent side of the U-shaped seat 18.

[0027] When the locking protection mechanism is activated, after the staff has completed the operation of the gate valve on the pipeline, in order to prevent other non-staff from erroneous operation, the staff first sends a control signal to the control sensor 16 in the mounting seat 7 through the control device. After receiving the control signal, the control sensor 16 controls the electromagnet 17 in the mounting seat 7 to energize and complete the conversion of the magnetic pole, so that the magnetic properties of the electromagnet 17 and the magnetic seat 33 on the U-shaped seat 18 are the same.

[0028] Then, according to the principle that like magnets repel and opposite magnets attract, the like repulsive force generated between the electromagnet 17 and the magnetic seat 33 pushes the U-shaped seat 18 in the movable guide groove 20 to slide synchronously toward the middle. While the U-shaped seat 18 moves synchronously toward the middle, it also drives the limiting strip seat 19 on its arc-shaped wall to move synchronously. When the arc-shaped wall of the U-shaped seat 18 contacts the outer wall of the valve stem 15, the limiting strip seat 19 on the arc-shaped wall of the U-shaped seat 18 limits the valve stem 15 to prevent it from rotating. After the U-shaped seat 18 moves into place, the magnetic attraction between the magnetic layers 22 on the adjacent side of the U-shaped seat 18 also cooperates with the assistance of the adjusting spring 21, so that the limiting strip seat 19 on the U-shaped seat 18 is tightly fitted with the outer wall surface of the valve stem 15, limiting the valve stem 15 to prevent other non-staff from performing misoperation.

[0029] The locking protection mechanism also includes an electromagnet 17. Electromagnets 17 are provided near the edges on both sides of the interior of the mounting seat 7. A control sensor 16 is provided in the middle of the side of the electromagnet 17 away from the U-shaped seat 18, which is used to adjust the magnetic changes of the electromagnet 17. A magnetic seat 33 is provided in the middle of the side away from the U-shaped seat 18. The magnetic seat 33 on the same side is connected to the middle of the electromagnet 17 through an adjusting spring 21. A limited position placement sleeve 10 is provided in the middle of both sides of the outer wall of the mounting seat 7.

[0030] When the staff needs to operate the gate valve, the staff sends a control signal through the control sensor 16 on the electromagnet 17 of the control equipment box. After receiving the control signal, the control sensor 16 controls the electromagnet 17 in the mounting seat 7 to be energized and complete the transformation of the magnetic pole, so that the magnetic pole of the electromagnet 17 after the transformation is completed is opposite to the magnetic pole of the magnetic seat 33 on the U-shaped seat 18. According to the principle that like magnets repel and opposite magnets attract, the magnetic attraction generated between the electromagnet 17 and the magnetic seat 33 drives the U-shaped seat 18 in the mobile guide groove 20 to move synchronously. The two U-shaped seats 18 in the mounting seat 7 are separated by the magnetic attraction generated between the strong magnetic block, the electromagnet 17 and the magnetic seat 33, and the adjustment spring 21 in the mounting seat 7 is compressed synchronously by the magnetic attraction generated by the two. The two U-shaped seats 18 in the mounting seat 7 are limited to prevent them from resetting and moving, so that subsequent staff can operate the gate valve, thereby completing the protection of the gate valve during use.

[0031] A signal receiver and a button lithium battery are provided inside the mounting base 7. The signal receiver is used to receive control signals sent by the staff's handheld control device on a daily basis, and the button lithium battery is used to supply energy to the control sensor 16 and the electromagnet 17 on a daily basis.

[0032] Please see the attached Figure 6 -Attached Figure 7 , a compensation sealing mechanism, which is arranged inside the valve body 1 and is used to perform magnetic self-compensation sealing on the gate valve during use; The compensating sealing mechanism includes an annular cavity 23. An annular cavity 23 is opened on one side of the middle part of the valve body 1. An annular permanent magnet 24 is provided on the inner side of the annular cavity 23 away from the gate plate 11, and the N pole on the annular permanent magnet 24 faces the gate plate 11. A silicone rubber elastic gasket 25 is provided on the outer wall side of the annular permanent magnet 24 away from the gate plate 11. A plurality of adjusting bolts 9 are arranged in a circular array on the outer side of the valve body 1 close to the annular cavity 23, and the ends of the adjusting bolts 9 all pass through the valve body 1 and contact the surface of the silicone rubber elastic gasket 25.

[0033] When the compensating sealing mechanism is started, when the gate 11 in the valve body 1 is in the closed state, the soft magnetic alloy sheet 13 on the gate 11 is tightly attached to the valve seat 12 in the valve body 1 under the influence and action of the magnetic attraction force of the annular permanent magnet 24 in the annular cavity 23, and at the same time, the lip of the V-shaped rubber sealing ring 14 on the gate 11 produces elastic deformation, thereby forming a double sealing interface in the valve body 1.

[0034] The compensating sealing mechanism also includes a soft magnetic alloy sheet 13. The soft magnetic alloy sheet 13 is connected to the surfaces of both sides of the gate plate 11 by countersunk screws. The surfaces of the soft magnetic alloy sheet 13 are hard chrome-plated. V-shaped rubber sealing rings 14 are embedded in the dovetail grooves on the edges of the sealing surfaces of the gate plate 11, and the V-shaped rubber sealing rings 14 form initial contact with the sealing surface of the valve seat 12.

[0035] When the sealing surface and seals on the valve seat 12 produce gaps due to wear and aging after long-term use, the air gap between the annular permanent magnet 24 in the annular cavity 23 and the soft magnetic alloy sheet 13 on the gate plate 11 increases, and the suction force decreases, triggering the adjusting bolt 9 on the valve body 1 to push the valve seat 12 to expand slightly through the medium pressure in the valve body 1. The slightly expanded adjusting bolt 9 squeezes the annular permanent magnet 24 on the silicone rubber elastic gasket 25 to deform and perform automatic fine-tuning at the same time, and simultaneously moves the soft magnetic alloy sheet 13 toward the valve seat 12, thereby restoring the magnetic attraction between the annular permanent magnet 24 and the soft magnetic alloy sheet 13. While the magnetic attraction between the two is restored, the sealing condition inside the gate valve is also restored synchronously.

[0036] When the gate valve is used in high-pressure working conditions, the pre-tightening force of the adjusting bolt 9 on the valve body 1 is increased, so that the end of the adjusting bolt 9 pushes the annular permanent magnet 24 in the annular cavity 23. At this time, the distance between the annular permanent magnet 24 and the soft magnetic alloy sheet 13 on the gate plate 11 is reduced, and the annular cavity 23 increases the magnetic adsorption force of the gate plate 11 in the valve body 1 and the soft magnetic alloy sheet 13 thereon, thereby offsetting the pushing force of the medium pressure on the sealing surface on the valve seat 12. When the gate valve is used in low-pressure working conditions, the staff resets the adjusting bolt 9 on the valve body 1. After the reset, the adjusting bolt 9 synchronously drives the annular permanent magnet 24 in the annular cavity 23 to reset. After the reset, the magnetic attraction force between the annular permanent magnet 24 and the soft magnetic alloy sheet 13 on the gate plate 11 automatically decreases, thereby avoiding the gate plate 11 from locking, thereby completing the compensation and sealing treatment of the gate valve during use.

[0037] Please see the attached Figure 8 -Attached Figure 10 , extreme protection mechanism, which is arranged at the top of the valve body 1, is used for protection and prevention treatment under extreme conditions of gate valve processing.

[0038] The extreme protection mechanism includes a locking cap 26. A locking cap 26 is provided on the top of the pressure cover 4. A plurality of pin slideways 27 are arranged in a circular array on the top of the locking cap 26. Locking pins 28 are slidably connected to the inside of the pin slideways 27. A plurality of locking holes 32 are arranged in a circular array around the top of the valve stem 15. Compression springs 29 are provided in the middle and upper part of the inner wall of the pin slideway 27, and one end of the compression spring 29 is connected to the corresponding position of the inner wall of the pin slideway 27, and the other end of the compression spring 29 is connected to the corresponding position of the top of the locking pin 28.

[0039] When the extreme protection mechanism is activated, when the gate valve is at normal temperature, the locking pin 28 in the pin slide 27 is in the initial position, and the compression spring 29 in the pin slide 27 is in a contracted state, and the length of the memory alloy wire 30 in the thermal alloy sleeve 5 remains at the initial length.

[0040] When the gate valve is in an extreme high temperature environment, when the ambient temperature is close to the Curie temperature, the thermosensitive alloy sleeve 5 on the lock cap 26 expands due to the high temperature. While the thermosensitive alloy sleeve 5 expands, it drives the raised seat 31 therein to move downward synchronously and enter the pin slide 27 in the lock cap 26. The raised seat 31 entering the pin slide 27 pushes the locking pin 28 in the pin slide 27 to move downward. After moving downward, the locking pin 28 enters the locking hole 32 at the top of the valve stem 15, thereby limiting and locking the valve stem 15. At the same time, when the locking pin 28 moves downward, the compression spring 29 in the pin slide 27 is pulled by the locking pin 28 from a contracted state to a stretched state, and the length of the memory alloy wire 30 in the thermosensitive alloy sleeve 5 is also synchronously lengthened due to the influence of the high temperature. Through the above operation, the valve stem 15 is limited and fixed, thereby completing the self-protection treatment of the gate valve in an extremely high temperature environment such as a fire.

[0041] The extreme protection mechanism also includes a thermosensitive alloy sleeve 5, which is provided on the pressure cover 4. The top circular array of the inner wall of the thermosensitive alloy sleeve 5 has multiple raised seats 31, and the positions of the raised seats 31 correspond to the positions of the pin slides 27 on the lock cap 26. The top circular array of the inner wall of the thermosensitive alloy sleeve 5 has multiple memory alloy wires 30, and one end of the memory alloy wire 30 is connected to the corresponding position of the thermosensitive alloy sleeve 5, and the other end of the memory alloy wire 30 is connected to the top of the corresponding locking pin rod 28.

[0042] After the high temperature ends, the temperature in the external environment drops, and the length of the memory alloy wire 30 in the thermal alloy sleeve 5 shrinks and resets. While resetting, the memory alloy wire 30 pulls the locking pin 28 in the pin slide 27 to move upward and reset. At the same time, it is assisted by the compression spring 29 in the stretched state in the pin slide 27, so that the locking pin 28 in the pin slide 27 is discharged from the locking hole 32 on the valve stem 15, thereby releasing the self-protection treatment of the gate valve. The staff can then manually adjust the gate valve to complete the self-protection treatment of the gate valve in extreme environments such as high temperature.

[0043] Moreover, in a high temperature environment, the electromagnet 17 and the magnetic seat 33 in the mounting seat 7 lose their magnetic force due to the influence of the high temperature, so after the subsequent extreme environment such as high temperature ends, the staff can adjust the state of the gate valve by manual adjustment.

[0044] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A copper gate valve with a magnetic lockable structure, characterized in that: include The valve body (1) is a basic component of the entire device and is used to assemble and support various mechanisms and their subordinate structural parts; A valve basic mechanism, which is arranged on the valve body (1) and is used to cooperate with other structural parts to perform basic operation processing of the valve; A locking and protection mechanism is provided on the upper part of the valve body (1) and is used to lock and protect the gate valve before or after use; A compensating sealing mechanism is arranged inside the valve body (1) and is used to perform magnetic self-compensating sealing on the gate valve during use; The extreme protection mechanism is arranged on the top of the valve body (1) and is used for protecting and preventing the gate valve from handling extreme conditions.

2. A copper gate valve with a magnetic lockable structure according to claim 1, characterized in that: The valve basic mechanism includes a valve cover (2), the valve cover (2) is connected to the four corners of the top of the valve body (1) by connecting bolts, a packing sleeve (8) is provided in the middle of the top of the valve cover (2), a packing pressure plate (3) is provided in the middle of the top of the packing pressure sleeve (8), the packing pressure plate (3) and the two sides of the middle of the packing pressure sleeve (8) are connected by connecting bolts, a hand wheel (6) is provided on the top of the packing pressure plate (3), and a pressure cover (4) is provided on the top of the hand wheel (6).

3. The copper gate valve with a magnetic lockable structure according to claim 2, characterized in that: The valve base mechanism further comprises a valve seat (12), valve seats (12) are provided on both sides of the middle of the valve body (1), a gate plate (11) is provided in the middle of the inner side of the valve body (1), a valve stem (15) is provided on the top of the gate plate (11), and the bottom of the valve stem (15) is connected to the middle of the top of the gate plate (11), and the top of the valve stem (15) passes through the valve cover (2), the packing sleeve (8), the packing plate (3), the limit placement sleeve (10) and the pressure cover (4) in sequence and extends upward.

4. The copper gate valve with a magnetic lockable structure according to claim 3, characterized in that: The locking protection mechanism includes a mounting seat (7), a mounting seat (7) is provided in the middle of the filler pressure plate (3), and movable guide grooves (20) are provided on both sides of the inner wall of the mounting seat (7), and two mirror-image U-shaped seats (18) are slidably connected between the movable guide grooves (20) on both sides, and a plurality of limit strip seats (19) are equidistantly provided on the arc-shaped wall in the middle of the adjacent side of the U-shaped seat (18), and a magnetic attraction layer (22) is provided on the surface of the adjacent side of the U-shaped seat (18).

5. The copper gate valve with a magnetic lockable structure according to claim 4, characterized in that: The locking protection mechanism also includes an electromagnet (17), and an electromagnet (17) is provided near the edge of both sides of the interior of the mounting seat (7). A control sensor (16) is provided in the middle of the side of the electromagnet (17) away from the U-shaped seat (18) for adjusting the magnetic change of the electromagnet (17). A magnetic seat (33) is provided in the middle of the side away from the U-shaped seat (18), and the magnetic seat (33) and the middle of the electromagnet (17) on the same side are connected through an adjusting spring (21). A limited position placement sleeve (10) is provided in the middle of both sides of the outer wall of the mounting seat (7).

6. The copper gate valve with a magnetic lockable structure according to claim 1, characterized in that: The compensating sealing mechanism includes an annular cavity (23), an annular cavity (23) is opened on one side of the middle part of the interior of the valve body (1), an annular permanent magnet (24) is provided on the inner side of the annular cavity (23) away from the gate plate (11), and the N pole of the annular permanent magnet (24) faces the gate plate (11), and a silicone rubber elastic gasket (25) is provided on the outer wall side of the annular permanent magnet (24) away from the gate plate (11), and a plurality of adjusting bolts (9) are arranged in a circumferential array on the outer side of the valve body (1) close to the annular cavity (23), and the ends of the adjusting bolts (9) all pass through the valve body (1) and contact the surface of the silicone rubber elastic gasket (25).

7. The copper gate valve with a magnetic lockable structure according to claim 6, characterized in that: The compensating sealing mechanism further comprises a soft magnetic alloy sheet (13), and both side surfaces of the gate plate (11) are connected with the soft magnetic alloy sheet (13) by countersunk screws, and the surfaces of the soft magnetic alloy sheet (13) are hard chrome plated, and a V-shaped rubber sealing ring (14) is embedded in the dovetail groove at the edge of the sealing surface of the gate plate (11), and the V-shaped rubber sealing ring (14) forms an initial contact with the sealing surface of the valve seat (12).

8. The copper gate valve with a magnetic lockable structure according to claim 3, characterized in that: The extreme protection mechanism includes a locking cap (26), a locking cap (26) is provided on the top of the pressure cover (4), a plurality of pin slideways (27) are arranged in a circumferential array on the top of the locking cap (26), and a locking pin rod (28) is slidably connected inside the pin slideway (27), a plurality of locking holes (32) are arranged in a circumferential array around the top of the valve stem (15), and a compression spring (29) is provided in the middle and upper part of the inner wall of the pin slideway (27), and one end of the compression spring (29) is connected to the corresponding position of the inner wall of the pin slideway (27), and the other end of the compression spring (29) is connected to the corresponding position of the top of the locking pin rod (28).

9. The copper gate valve with a magnetic lockable structure according to claim 8, characterized in that: The extreme protection mechanism also includes a thermosensitive alloy sleeve (5), the pressure cover (4) is provided with a thermosensitive alloy sleeve (5), the top circumferential array of the inner wall of the thermosensitive alloy sleeve (5) has a plurality of raised seats (31), the positions of the raised seats (31) respectively correspond to the positions of the pin slideways (27) on the lock cap (26), the top circumferential array of the inner wall of the thermosensitive alloy sleeve (5) has a plurality of memory alloy wires (30), and one end of the memory alloy wire (30) is connected to the corresponding position of the thermosensitive alloy sleeve (5), and the other end of the memory alloy wire (30) is connected to the top of the corresponding locking pin rod (28).

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