Protective sealing stop valve

Abstract

The invention relates to the technical field of valves, and discloses a protection type sealing stop valve which comprises a valve body. An input pipe; an output pipe; the control mechanism is used for controlling the flow of the valve body; the input pipe and the output pipe are connected to the surface of the valve body; the control mechanism comprises a closing device and a sealing device; the control device directly controls the sealing device to conduct sealing type closing on the flow of the valve body. According to the protection type sealing stop valve, different sealing faces can be guaranteed in the sealing process of the valve body through the arranged tubular rotary seal of a special structure, contact abrasion caused by hard contact sealing can be reduced through staggered sealing, and compared with cone type valve element sealing in the prior art, the tubular sealing structure has the advantages that the sealing effect is good, and the sealing effect is good. Oil gas flow power in the valve is used as a power source to drive the tubular sealing structure to rotate, so that'staggered plane sealing 'during sealing each time is realized, the sealing service life of the whole valve body is further prolonged, and the sealing effect of the whole valve body is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a protective sealing stop valve. Background Art

[0002] The stop valve, also known as the isolation valve, is a valve that cuts off the medium in the pipeline or allows the medium to flow at a certain moment. It is widely used in power, petroleum, chemical, aviation, aerospace and other industries. According to the purpose, it is divided into high-temperature and high-pressure valves, medium-temperature and medium-pressure valves and low-temperature and low-pressure valves. According to the sealing surface material, it is divided into hard seal and soft seal. The operating pressure of low-temperature and low-pressure valves is generally below 2.5MPa, and the maximum temperature is generally around 150 degrees.

[0003] The valve core and valve seat of the stop valve in the prior art are mostly made of non-metallic materials, and the sealing material is soft seal. The soft seal has great plasticity, good sealing effect, simple manufacturing, low cost, but poor strength. It is easy to deform and age in the working state where the medium contains impurities or after long-term use. The sealing is not tight and the service life is not long. If a valve core or valve seat made of metal material is used, a certain amount of wear will occur during the long-term opening and closing process. Because the sealing surface of the valve core and valve seat of the prior art is in a fixed state, the surface will inevitably produce a certain degree of wear under long-term extrusion and hard contact, which will lead to reduced sealing performance and omissions in the later closing process. Maintenance personnel need to regularly replace the valve core and valve seat, which is cumbersome to operate. Therefore, a protective sealing stop valve is proposed to solve the above-mentioned problems. Summary of the invention

[0004] Technical issues solved In view of the deficiencies in the prior art, the present invention provides a protective sealing stop valve, which solves the problem that the stop valve in the prior art is too simple in sealing performance, resulting in a certain degree of wear on the sealing surface under long-term opening and closing actions, resulting in reduced sealing performance.

[0005] (II) Technical solution To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a protective sealed stop valve, comprising a valve body; an input pipe; an output pipe; a control mechanism for controlling the flow of the valve body; the input pipe and the output pipe are connected to the surface of the valve body; the control mechanism comprises a closing device, a control device and a sealing device; the control device directly controls the closing device to seal the flow of the valve body; the sealing device comprises a rotating assembly and a top sealing device, the rotating assembly is used to control the closing device to perform offset sealing, and the top sealing device is used to provide soft material for secondary sealing of the valve body.

[0006] Preferably, the control mechanism includes an adjusting wheel, which is rotatably connected to the valve body, the internal thread of the adjusting wheel is connected to a valve stem, the bottom of the valve stem is connected to a valve sleeve, the interior of the valve sleeve is rotatably connected to a closed circular tube, and the surface of the closed circular tube abuts against the end face of the input pipe to achieve contact closure.

[0007] Preferably, the rotating assembly includes a cannula, which is slidably connected to the input pipe, the top of which is connected to the valve sleeve, a through hole is provided on the cannula, the through hole is connected to the interior of the valve sleeve through a fine water hole, an impeller is provided inside the valve sleeve, and the impeller is connected to the closed circular tube through a connecting piece.

[0008] Preferably, the top sealing device includes a sealing seat, which is installed on the output pipe, a piston rod is slidably connected inside the closed circular tube, one end of the piston rod is connected to a piston plate, the other end of the piston rod is connected to a sliding sheet, the right side of the sliding sheet is connected to a rubber ring, a rubber groove matching the rubber ring is provided on the sealing seat, the interior of the closed circular tube is connected to a fixed plate via a guide rod, and the inner surface of the rubber ring is slidably connected to the outer surface of the fixed plate.

[0009] Preferably, the sliding plate is slidably connected to the inside of the closed circular tube through a key groove, a return spring is sleeved on the surface of the piston rod, one end of the return spring is connected to the sliding plate, and the other end of the return spring is connected to the inside of the closed circular tube, and the impeller is fixedly connected to the piston plate.

[0010] Preferably, the right end of the closed circular tube is slidably connected to three protection sheets via a T-slot, and the surfaces of the three protection sheets are all provided with arc grooves, arc springs are provided inside the arc grooves, and a slope is provided on the contact surface between the protection sheet and the rubber ring.

[0011] Preferably, an accommodating cavity is provided inside the valve body, a sliding groove is provided on the inner surface of the valve body, the valve sleeve is slidably connected to the sliding groove, and the left end of the valve sleeve abuts against the inner wall of the valve body.

[0012] Preferably, a pressure indicating mechanism is also included, the pressure indicating mechanism includes a pressure plate, the pressure plate is slidably connected to the inside of the valve body, a pressure spring is provided on the pressure plate, a sliding tooth plate is fixedly connected to the pressure plate, a pinion is meshed with teeth on the sliding tooth plate, a pointer is connected to the axis of the pinion through a shaft, a display panel is provided on the pointer, the display panel is mounted on the valve body, and a prompt device is also provided on the valve body.

[0013] Preferably, the prompt device includes a rotating rod, one end of the rotating rod is connected to a sliding column, the other end of the rotating rod is connected to a sphere, a copper tube is arranged below the sphere, the copper tube is installed on the valve body, the middle part of the rotating rod is rotatably connected to the valve body, and a torsion spring is arranged at the rotating point of the rotating rod and the valve body, and a plurality of triangles are arranged on the surface of the sliding tooth plate, and the triangles are abutted against the sliding column.

[0014] (III) Beneficial effects Compared with the prior art, the present invention provides a protective sealing stop valve, which has the following beneficial effects: 1. The protective sealing stop valve, through the specially structured tubular rotary seal, can ensure that the sealing surface is different each time during the valve body closing process. Compared with the traditional fixed surface sealing, the staggered sealing can reduce the contact wear caused by the hard contact seal. Compared with the cone-shaped valve core seal in the prior art, the tubular sealing structure uses the oil and gas flow force in the valve as the power source to drive the tubular sealing structure to rotate, thereby realizing "staggered surface sealing" during each closing, further improving the overall valve body sealing service life and sealing effect.

[0015] 2. The protective sealing stop valve can provide a soft material to seal the end face of the output pipe through the top sealing device, thereby realizing "soft sealing". In the stage of valve body opening, the soft material will shrink into the "protective space", thereby ensuring that the soft material will not be corroded by the flow of the medium, further improving the efficiency of the soft seal, and utilizing the double seal of hard seal and soft seal to improve the overall sealing effect of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a protective sealing stop valve proposed by the present invention; Figure 2 This is a schematic diagram of the overall cross-sectional structure of a protective sealing stop valve proposed by the present invention; Figure 3 A schematic diagram of the structure of a sealing device of a protective sealing stop valve proposed by the present invention; Figure 4 A partial structural schematic diagram of a rotating assembly of a protective sealing stop valve proposed by the present invention; Figure 5 This is a schematic structural diagram of a top sealing device of a protective sealing stop valve proposed by the present invention; Figure 6 This is a schematic diagram of the cross-sectional position structure of a protective sheet of a protective sealing stop valve proposed by the present invention; Figure 7This is a schematic diagram of the connection relationship of three protection sheets of a protective sealing stop valve proposed by the present invention; Figure 8 A schematic diagram of a pressure display mechanism of a protective sealing stop valve proposed by the present invention; Fig. 9 The present invention is a schematic structural diagram of a reminder device for a protective sealing stop valve.

[0017] In the figure: 1. valve body; 2. input pipe; 3. output pipe; 4. control mechanism; 41. adjusting wheel; 42. valve stem; 43. valve sleeve; 44. closed round tube; 45. rotating assembly; 451. impeller; 452. insert pipe; 453. through hole; 454. fine water hole; 455. top sealing device; 456. sealing seat; 457. rubber ring; 458. protective sheet; 459. arc spring; 460. guide rod; 461. fixed plate; 462. sliding sheet; 463. reset spring; 464. piston plate; 465. piston rod; 5. pressure display mechanism; 51. pressure sheet; 52. pressure spring; 53. display panel; 54. pointer; 55. pinion; 56. sliding tooth plate; 57. prompt device; 571. sliding column; 572. copper tube; 573. rotating rod. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1-Figure 9 A protective sealed stop valve comprises a valve body 1; an input pipe 2; an output pipe 3; a control mechanism 4 for controlling the flow of the valve body 1; the input pipe 2 and the output pipe 3 are connected to the surface of the valve body 1; the control mechanism 4 comprises a closing device, a control device and a sealing device; the control device directly controls the closing device to seal the flow of the valve body 1; the sealing device comprises a rotating component 45 and a top sealing device 455, the rotating component 45 is used to control the closing device to perform dislocation sealing, and the top sealing device 455 is used to provide soft material for secondary sealing of the valve body 1.

[0020] In this embodiment, the control device includes an adjusting wheel 41, which is rotatably connected to the valve body 1, and the internal thread of the adjusting wheel 41 is connected to the valve stem 42, and the bottom of the valve stem 42 is connected to the valve sleeve 43, and the internal rotatable connection of the valve sleeve 43 is connected to the closed circular tube 44, and the surface of the closed circular tube 44 abuts against the end surface of the input pipe 2 to achieve contact closure. According to the traditional technology, the rotation of the adjusting wheel 41 is controlled, and the rise or fall of the valve stem 42 is controlled by the threaded connection method. After that, the valve stem 42 will drive the valve sleeve 43 to move downward, and in the synchronous state, the closed circular tube 44 will also move downward. In the process of moving downward, the right end surface will gradually block the inlet position of the output pipe 3, which will also reduce the flow rate of the medium, and when the closed circular tube 44 descends, the arc surface will also reduce the distance with the input pipe 2, which will also reduce the flow rate of the output medium of the input pipe 2 synchronously, so when the closed circular tube 44 moves up and down, the flow control effect of the traditional method will be achieved.

[0021] Furthermore, the rotating assembly 45 includes a plug 452, which is slidably connected to the input pipe 2, and the top of the plug 452 is connected to the valve sleeve 43. A through hole 453 is opened on the plug 452, and the through hole 453 is connected to the interior of the valve sleeve 43 through a fine water hole 454. An impeller 451 is arranged inside the valve sleeve 43, and the impeller 451 is connected to the closed circular tube 44 through a connecting piece. When the valve sleeve 43 moves downward, it will drive the insert pipe 452 to slide inside the input pipe 2, and the surface of the input pipe 2 and the insert pipe 452 are in a sliding sealing state. After that, when the through hole 453 enters the internal space of the input pipe 2, the medium inside the input pipe 2 will enter from the position of the through hole 453, and then enter the left internal space of the valve sleeve 43 through a plurality of fine water holes 454. Then, the medium will drive the rotation of the impeller 451, and the impeller 451 will drive the rotation of the piston plate 464, and then drive the rotation of the piston rod 465. The piston rod 465 will drive the rotation of the sliding plate 462, and the sliding plate 462 will rotate through the The keyway connection will drive the rotation of the closed circular tube 44, so when the closed circular tube 44 is about to move down to the lowest position, the medium will drive the overall rotation of the closed circular tube 44, so the closed circular tube 44 is in contact with the end face of the input pipe 2 in a rotating state. At this time, each closure of the valve body 1 will drive the closed circular tube 44 to contact and close with the input pipe 2 in a rotating state, so the contact surface with the input pipe 2 is random each time, and there is a small probability that the same surface contacts and closes with the input pipe 2, which ensures that in a hard contact state, it will not be affected by long-term contact in the same position, causing wear and affecting the subsequent sealing effect.

[0022] In addition, the top sealing device 455 includes a sealing seat 456, which is installed on the output pipe 3. A piston rod 465 is slidably connected in the closed circular tube 44, one end of the piston rod 465 is connected to a piston plate 464, the other end of the piston rod 465 is connected to a sliding sheet 462, and the right side of the sliding sheet 462 is connected to a rubber ring 457. A rubber groove that cooperates with the rubber ring 457 is provided on the sealing seat 456, and the interior of the closed circular tube 44 is connected to a fixed plate 461 through a guide rod 460, and the inner surface of the rubber ring 457 is slidably connected to the outer surface of the fixed plate 461. The inner space of the impeller 451 is filled, and then the medium delivery pressure thereof is used to push the piston plate 464 to slide to the right. The lateral sliding of the piston plate 464 will drive the sliding of the sliding piece 462 synchronously through the connection with the sliding piece 462. Then, the sliding of the sliding piece 462 will push the rubber ring 457 forward, and the sliding piece 462 will push the rubber ring 457 to slide into the slot of the sealing seat 456, thereby realizing the abutment soft sealing of the rubber ring 457.

[0023] In addition, the sliding piece 462 is slidably connected to the inside of the closed circular tube 44 through a keyway, a return spring 463 is sleeved on the surface of the piston rod 465, one end of the return spring 463 is connected to the sliding piece 462, and the other end of the return spring 463 is connected to the inside of the closed circular tube 44, and the impeller 451 is fixedly connected to the piston plate 464. Through the provided return spring 463, when the valve body 1 is opened, the sliding piece 462 is synchronously pulled to move leftward and reset, thereby driving the piston rod 465 to slide and reset, so at this time the piston plate 464 will squeeze out the internal cavity medium of the impeller 451, enter the inside of the valve body 1, and then flow out to the output pipe 3 following the flow of the medium.

[0024] It is worth noting that the right end of the closed circular tube 44 is slidably connected to three protective sheets 458 through a T-slot, and the surfaces of the three protective sheets 458 are all provided with arc grooves, arc springs 459 are provided inside the arc grooves, and inclined surfaces are provided on the contact surfaces between the protective sheets 458 and the rubber ring 457. When the rubber ring 457 contracts, the three protective sheets 458 will be subject to the contraction force of the arc spring 459, so as to close the right side of the rubber ring 457, ensure that the rubber ring 457 is in a state of circulation in the valve body 1, the medium will not contact the rubber ring 457, or reduce the direct contact between the rubber ring 457 and the medium, reduce the corrosion of the rubber ring 457, and increase the service life of the rubber ring 457.

[0025] It is worth noting that a receiving cavity is provided inside the valve body 1, a slide groove is provided on the inner surface of the valve body 1, the valve sleeve 43 is slidably connected to the slide groove, and the left end of the valve sleeve 43 abuts against the inner wall of the valve body 1. The receiving cavity is provided to store a certain amount of medium, so as to facilitate the subsequent detection of whether the interior of the valve body 1 is in an absolutely sealed condition. The slide groove is provided to limit the position of the valve sleeve 43 to avoid rotational dislocation of the valve sleeve 43 when sliding up and down.

[0026] In addition, a pressure display mechanism 5 is also included, which includes a pressure plate 51, which is slidably connected to the inside of the valve body 1, a pressure spring 52 is arranged on the pressure plate 51, a sliding tooth plate 56 is fixedly connected to the pressure plate 51, a small gear 55 is meshed with teeth on the sliding tooth plate 56, a pointer 54 is connected to the axis of the small gear 55 through a shaft, a display plate 53 is arranged on the pointer 54, the display plate 53 is installed on the valve body 1, and a prompt device 57 is also arranged on the valve body 1. The pressure display mechanism 5 is set to display the internal pressure change when the valve body 1 is closed, to ensure whether there is an absolute sealing state inside. When the pressure plate 51 is pushed downward by the pressure spring 52, the pressure plate 51 will squeeze the internal medium and generate a certain degree of pressure. If it is a sealing state, the position of the pressure plate 51 will be kept constant, so the angle state of the pointer 54 will be constant at this time. If a seal leak occurs inside the valve body 1, the pressure plate 51 will drive the sliding tooth plate 56 to move downward, and the meshing of the teeth will drive the rotation of the pinion 55, and then drive the rotation of the pointer 54. Therefore, the operator can judge whether the interior of the valve body 1 is in an absolutely sealed condition according to the rotation state of the pointer 54, and thereby inspect the valve body 1.

[0027] In addition, the prompt device 57 includes a rotating rod 573, one end of the rotating rod 573 is connected to the sliding column 571, the other end of the rotating rod 573 is connected to the ball, a copper tube 572 is arranged under the ball, the copper tube 572 is installed on the valve body 1, the middle part of the rotating rod 573 is rotatably connected to the valve body 1, and a torsion spring is arranged at the rotation point of the rotating rod 573 and the valve body 1, and a plurality of triangles are arranged on the surface of the sliding tooth plate 56, and the triangles are abutted against the sliding column 571. A prompt device 57 is provided in order to provide an internal pressure imbalance when the valve body 1 is in use. Because under actual working conditions, the medium input pressure of the input pipe 2 may fluctuate, and in this state, it will affect the subsequent medium output state and have a greater impact on the valve body 1. Therefore, when the medium input pressure continues to change, the internal medium pressure will push the pressure plate 51 to continuously vibrate up and down, and the up and down vibration of the pressure plate 51 will synchronously drive the up and down movement of the sliding tooth plate 56, and then the contact between the triangle on the sliding tooth plate 56 and the sliding column 571 will control the rotating rod 573 to continuously swing, and the internally arranged torsion spring will push the connecting ball under the rotating rod 573 to continuously hit the copper tube 572, generating a warning sound, so the operator can adaptively control the valve body 1 according to the prompt sound.

[0028] Working principle: first, when the entire valve body 1 opens and closes the passage, the medium will enter from the position of the input pipe 2, then flow to the end face outlet position of the input pipe 2, then enter the internal cavity of the valve body 1, and then enter the interior of the output pipe 3 from the left end inlet of the output pipe 3 and be discharged from its outlet to realize the circulation of the medium. When it is necessary to regulate the flow of the valve body 1, at this time, according to the traditional technology, the rotation of the adjusting wheel 41 is controlled, and the rise or fall of the valve stem 42 is controlled by a threaded connection. Then the valve stem 42 will drive the valve sleeve 43 to move downward. In the synchronous state, the closed circular pipe 44 will also move downward. During the downward movement, the right end face will gradually block the inlet position of the output pipe 3, which will also reduce the circulation of the medium. When the closed circular pipe 44 descends, the arc surface will also decrease the distance with the input pipe 2, which will also synchronously reduce the flow of the output medium of the input pipe 2. Therefore, when the closed circular pipe 44 moves up and down, the traditional flow control effect will be achieved. When sealing is required, the valve sleeve 43 is moved down to the lowest position, abutted against the end face of the input pipe 2, and the arc face of the closed circular tube 44 is used to abut and seal against the outlet position of the input pipe 2, so as to realize the overall hard contact sealing of the valve body 1. When the valve sleeve 43 moves down, it will drive the insert pipe 452 to slide inside the input pipe 2, and the surface of the input pipe 2 and the insert pipe 452 are in a sliding sealing state. After that, when the through hole 453 enters the internal space of the input pipe 2, the medium inside the input pipe 2 will enter from the position of the through hole 453, and then enter the left internal space of the valve sleeve 43 through a plurality of fine water holes 454. Then, the medium will drive the rotation of the impeller 451, and the impeller 451 will drive the rotation of the piston plate 464, and then drive the rotation of the piston rod 465. The piston rod 465 will drive the rotation of the sliding plate 462, and the sliding plate 462 is connected by a keyway. It will drive the rotation of the closed circular tube 44, so when the closed circular tube 44 is about to move down to the lowest position, the medium will drive the overall rotation of the closed circular tube 44, so the closed circular tube 44 is in contact with the end face of the input pipe 2 in a rotating state. At this time, it will be formed that each closure of the valve body 1 will drive the closed circular tube 44 to contact and close with the input pipe 2 in a rotating state, so each contact surface with the input pipe 2 is random, and there is a small probability that the same surface contacts and closes with the input pipe 2, which ensures that in a hard contact state, it will not be subject to long-term contact in the same position, causing wear and affecting the subsequent sealing and closing effect, thereby improving the overall service life of the valve body 1.After the closed circular tube 44 is completely in contact, the medium will drive the impeller 451 to rotate and fill the internal space of the impeller 451. Then, the medium delivery pressure will be used to push the piston plate 464 to slide rightward. The lateral sliding of the piston plate 464 will drive the sliding plate 462 to slide synchronously through the connection with the sliding plate 462. Then, the sliding plate 462 will push the rubber ring 457 forward after sliding. Then, the rubber ring 457 will contact the inclined surfaces of the three protective plates 458 after moving forward. With the continuous input of medium pressure, it will directly push The rubber ring 457 squeezes the three protection sheets 458 and controls the three protection sheets 458 to slide and open on the closed circular tube 44 to make way. Then the sliding sheet 462 pushes the rubber ring 457 to slide into the slot of the sealing seat 456 to achieve the abutment soft seal of the rubber ring 457. Therefore, the overall double-layer structure sealing effect is achieved, one is the metal contact abutment hard contact seal, and the other is the rubber pad soft contact seal, which ultimately improves the overall closed sealing effect of the valve body 1 and the service life of the valve body 1, without the need to replace the wearing parts of the valve body 1 in a short time. In addition, considering that the medium may cause a certain degree of corrosion to the rubber ring 457 during the circulation process of the valve body 1, a protective structure is provided, namely, three protective sheets 458. When the valve body 1 is in the circulation state, the medium inside the impeller 451 will flow back from the inside of the fine water hole 454 to the inside of the insert pipe 452, and then flow into the internal cavity of the valve body 1 from the position of the through hole 453. Because the insert pipe 452 is in the circulation state of the valve body 1 at this time, the through hole 453 will move out from the inside of the input pipe 2 and enter the internal cavity of the valve body 1. Therefore, at this time, the medium will be affected by the reset spring 463, pulling the sliding sheet 462 to move left and right. Position, thereby driving the piston rod 465 to slide and reset, so at this time the piston plate 464 will squeeze out the internal cavity medium of the impeller 451, enter the interior of the valve body 1, and then follow the flow of the medium to flow out to the output pipe 3. At this time, after the rubber ring 457 shrinks and enters the interior of the fixed plate 461, the three protective sheets 458 will be subject to the contraction force of the arc spring 459, so as to achieve the closure of the right side of the rubber ring 457, ensuring that the rubber ring 457 is in the flow state of the valve body 1, the medium will not contact the rubber ring 457, or the direct contact between the rubber ring 457 and the medium is reduced, thereby reducing the corrosion of the rubber ring 457 and increasing the service life of the rubber ring 457.The entire valve body 1 is also provided with a pressure display mechanism 5 in order to display the internal pressure change when the valve body 1 is closed, to ensure whether there is an absolute sealing state inside. When the valve body 1 is performing soft sealing and hard sealing, the pressure inside the valve body 1 will not be released instantly, that is, there is still a certain degree of medium inside. Because the inlet position of the output pipe 3 is blocked, the medium inside the cavity of the valve body 1 will still exist. Then, when the pressure plate 51 is pushed downward by the pressure spring 52, the pressure plate 51 will squeeze the internal medium and generate a certain degree of pressure. If it is a sealed state, the position of the pressure plate 51 will remain constant. If there is a sealing leakage inside the valve body 1, the pressure plate 51 will drive the sliding tooth plate 56 to move downward, and use the meshing of the teeth to drive the rotation of the pinion 55, and then drive the rotation of the pointer 54. Therefore, the operator can judge whether the interior of the valve body 1 is in an absolutely sealed condition according to the rotation state of the pointer 54, so as to inspect the valve body 1. In addition, the technical solution is also provided with a prompt device 57, the purpose of which is to provide an internal pressure imbalance when the valve body 1 is in use. Because under actual working conditions, the medium input pressure of the input pipe 2 may fluctuate, and in this state, it will affect the subsequent medium output state and have a greater impact on the valve body 1. Therefore, when the medium input pressure continues to change, the internal medium pressure will push the pressure plate 51 to continuously vibrate up and down, and the up and down vibration of the pressure plate 51 will synchronously drive the up and down movement of the sliding tooth plate 56, and then the contact between the triangle on the sliding tooth plate 56 and the sliding column 571 will control the continuous swinging movement of the rotating rod 573, and the internally arranged torsion spring will push the connecting ball under the rotating rod 573 to continuously collide with the copper tube 572, generating a warning sound, so the operator can adaptively control the valve body 1 according to the prompt sound.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A protective sealing stop valve, characterized in that: include Valve body (1); Input tube (2); Output pipe (3); A control mechanism (4) for controlling the flow of the valve body (1); The input pipe (2) and the output pipe (3) are connected to the surface of the valve body (1); The control mechanism (4) comprises a closing device, a control device and a sealing device; The control device directly controls the closing device to seal the flow of the valve body (1); The sealing device comprises a rotating assembly (45) and a top sealing device (455); the rotating assembly (45) is used to control the sealing device to perform offset sealing; and the top sealing device (455) is used to provide a soft material for secondary sealing of the valve body (1).

2. A protective sealing stop valve according to claim 1, characterized in that: The control device comprises an adjusting wheel (41), the adjusting wheel (41) being rotatably connected to the valve body (1), the internal thread of the adjusting wheel (41) being connected to a valve stem (42), the bottom of the valve stem (42) being connected to a valve sleeve (43), the interior of the valve sleeve (43) being rotatably connected to a closed circular tube (44), the surface of the closed circular tube (44) being in contact with the end surface of the input pipe (2) to achieve contact sealing.

3. A protective sealing stop valve according to claim 2, characterized in that: The rotating assembly (45) comprises a plug (452), the plug (452) being slidably connected to the input pipe (2), the top of the plug (452) being connected to the valve sleeve (43), the plug (452) being provided with a through hole (453), the through hole (453) being connected to the interior of the valve sleeve (43) via a fine water hole (454), the interior of the valve sleeve (43) being provided with an impeller (451), the impeller (451) being connected to the closed circular pipe (44) via a connecting piece.

4. A protective sealing stop valve according to claim 3, characterized in that: The top sealing device (455) comprises a sealing seat (456), the sealing seat (456) being mounted on the output pipe (3), a piston rod (465) being slidably connected inside the closed circular tube (44), one end of the piston rod (465) being connected to a piston plate (464), the other end of the piston rod (465) being connected to a sliding sheet (462), the right side of the sliding sheet (462) being connected to a rubber ring (457), a rubber groove being provided on the sealing seat (456) being matched with the rubber ring (457), the interior of the closed circular tube (44) being connected to a fixing plate (461) via a guide rod (460), the inner surface of the rubber ring (457) being slidably connected to the outer surface of the fixing plate (461).

5. A protective sealing stop valve according to claim 4, characterized in that: The sliding plate (462) is slidably connected to the inside of the closed circular tube (44) via a keyway; a return spring (463) is sleeved on the surface of the piston rod (465); one end of the return spring (463) is connected to the sliding plate (462); the other end of the return spring (463) is connected to the inside of the closed circular tube (44); and the impeller (451) is fixedly connected to the piston plate (464).

6. A protective sealing stop valve according to claim 5, characterized in that: The right end of the closed circular tube (44) is slidably connected to three protection sheets (458) via a T-shaped groove, and the surfaces of the three protection sheets (458) are all provided with arc grooves, arc springs (459) are provided inside the arc grooves, and inclined surfaces are provided on the contact surfaces between the protection sheets (458) and the rubber rings (457).

7. A protective sealing stop valve according to claim 6, characterized in that: The valve body (1) is provided with an accommodating cavity inside, the inner surface of the valve body (1) is provided with a sliding groove, the valve sleeve (43) is slidably connected to the sliding groove, and the left end of the valve sleeve (43) abuts against the inner wall of the valve body (1).

8. The protective sealing stop valve according to claim 1, characterized in that: The valve body (1) further comprises a pressure display mechanism (5), wherein the pressure display mechanism (5) comprises a pressure plate (51), the pressure plate (51) is slidably connected to the inside of the valve body (1), a pressure spring (52) is arranged on the pressure plate (51), a sliding tooth plate (56) is fixedly connected to the pressure plate (51), a pinion (55) is meshed with teeth on the sliding tooth plate (56), a pointer (54) is connected to the axis of the pinion (55) via a shaft, a display panel (53) is arranged on the pointer (54), and the display panel (53) is mounted on the valve body (1). The valve body (1) is also provided with a prompt device (57).

9. A protective sealing stop valve according to claim 8, characterized in that: The prompt device (57) comprises a rotating rod (573), one end of the rotating rod (573) is connected to a sliding column (571), the other end of the rotating rod (573) is connected to a sphere, a copper tube (572) is arranged below the sphere, the copper tube (572) is mounted on the valve body (1), the middle part of the rotating rod (573) is rotatably connected to the valve body (1), and a torsion spring is arranged at the rotation point between the rotating rod (573) and the valve body (1), and a plurality of triangles are arranged on the surface of the sliding tooth plate (56), and the triangles are in contact with the sliding column (571).

Images