A protective sealed globe valve

Abstract

The present invention relates to the technical field of valves, and discloses a protective sealed globe valve, which includes a valve body; an input pipe; an output pipe; a control mechanism for controlling the flow rate of the valve body; the input pipe and the output pipe are connected to the surface of the valve body; the control mechanism includes a closing device and a sealing device; the control device directly controls the closing device to perform a sealed closing on the flow rate of the valve body. For this protective sealed globe valve, through the tube-type rotary seal with a special structure provided, it can ensure that each sealing surface is different during the process of closing the valve body. The seal using the dislocation method can reduce the contact wear caused by hard contact sealing. Compared with the conical valve core seal in the prior art, this tube-type sealing structure uses the oil and gas flow power in the valve as the power source to drive the rotation of the tube-type sealing structure, so as to achieve "misaligned surface closing" during each closing, further improving the overall service life and sealing effect of the valve body seal.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly to a protective sealed globe valve. Background Art

[0002] A globe valve, also known as a cut-off valve, refers to a valve that cuts off or allows the flow of a medium in a pipeline at a certain moment, and is widely used in industries such as electric power, petroleum, chemical industry, aviation, and aerospace. It is classified into high-temperature and high-pressure valves, medium-temperature and medium-pressure valves, and low-temperature and low-pressure valves according to their uses, and into hard-sealed and soft-sealed valves according to the material of the sealing surface. The operating pressure of low-temperature and low-pressure valves is generally below 2.5 MPa, and the maximum temperature is generally about 150 degrees.

[0003] In the existing globe valves, most of their valve cores and valve seats are made of non-metallic materials and use soft-sealed materials. Soft seals have high plasticity, good sealing effects, are easy to manufacture, and have low costs, but they have poor strength. In the working state where the medium contains impurities or after long-term use, they are prone to deformation, aging, loose sealing, and short service life. If the valve core or valve seat is made of metal material, certain wear will also occur during long-term opening and closing processes. Because the sealing surfaces of the valve core and valve seat in the existing technology are in a fixed state, under long-term extrusion and hard contact, the surface will surely have a certain degree of wear, which will lead to a decrease in the sealing performance during the later closing process and leakage, and maintenance personnel need to regularly replace the valve core and valve seat, resulting in cumbersome operations. Therefore, a protective sealed globe valve is proposed to solve the above-mentioned problems. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the existing technology, the present invention provides a protective sealed globe valve, which solves the problem that the sealing performance of the globe valve in the existing technology is too single, resulting in a certain degree of wear on the sealing surface during long-term opening and closing operations and a decrease in the sealing performance.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the present invention provides the following technical solution: A protective sealed globe valve, comprising a valve body; an input pipe; an output pipe; a control mechanism for controlling the flow rate of the valve body; the input pipe and the output pipe are connected to the surface of the valve body; the control mechanism includes a closing device and a sealing device; the control mechanism directly controls the closing device to perform a sealed closing of the flow rate of the valve body; the sealing device includes a rotating assembly and a top-sealing device, the rotating assembly is used to control the closing device to perform a misaligned closing, and the top-sealing device is used to provide a soft material for secondary sealing of the valve body.

[0008] Preferably, the control mechanism includes an adjusting wheel rotatably connected to the valve body. A valve stem is threadedly connected inside the adjusting wheel. The bottom of the valve stem is connected to a valve sleeve. A closed circular tube is rotatably connected inside the valve sleeve. The surface of the closed circular tube abuts against the end face of the input pipe to achieve contact closure.

[0009] Preferably, the rotating assembly includes an insertion tube slidably connected to the input pipe. The top of the insertion tube is connected to the valve sleeve. Through holes are formed in the insertion tube and communicate with the inside of the valve sleeve through thin water holes. An impeller is arranged inside the valve sleeve, and the impeller is connected to the closed circular tube through a connecting member.

[0010] Preferably, the top sealing device includes a sealing seat 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, and the other end of the piston rod is connected to a sliding piece. A rubber ring is connected to the right side of the sliding piece. A rubber groove matching with the rubber ring is arranged on the sealing seat. A fixing plate is connected inside the closed circular tube through a guide rod. The inner surface of the rubber ring is slidably connected to the outer surface of the fixing plate.

[0011] Preferably, the sliding piece is slidably connected inside 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 piece, and the other end of the return spring is connected inside the closed circular tube. The impeller is fixedly connected to the piston plate.

[0012] Preferably, three protection pieces are slidably connected to the right end of the closed circular tube through T-shaped grooves. Arc grooves are arranged on the surfaces of the three protection pieces. Arc springs are arranged inside the arc grooves. An inclined surface is arranged on the contact surface between the protection piece and the rubber ring.

[0013] Preferably, a receiving cavity is arranged inside the valve body. A sliding groove is formed 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.

[0014] Preferably, it further includes a pressure display mechanism which includes a pressure piece slidably connected inside the valve body. A pressure spring is arranged on the pressure piece. A sliding toothed plate is fixedly connected to the pressure piece. A small gear is meshed with the sliding toothed plate through teeth. A pointer is connected to the center of the small gear through a shaft rod. A display disk is arranged on the pointer, and the display disk is installed on the valve body. A prompting device is also arranged on the valve body.

[0015] Preferably, the prompting device includes a rotating rod, one end of the rotating rod is connected with a sliding column, the other end of the rotating rod is connected with 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 rotation point of the rotating rod and the valve body. A plurality of triangular bodies are arranged on the surface of the sliding tooth plate, and the triangular bodies are in contact with the sliding column.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the present invention provides a protective sealed stop valve, which has the following beneficial effects:

[0018] 1. For this protective sealed stop valve, through the tube-type rotary seal with a special structure, it can ensure that the sealing surface is different each time during the process of closing the valve body. Compared with the traditional fixed-surface closing, the misaligned sealing method can reduce the contact wear caused by hard-contact sealing. Compared with the conical valve core seal in the prior art, this tube-type sealing structure uses the oil and gas flow power in the valve as the power source to drive the tube-type sealing structure to rotate, so as to achieve "misaligned surface closing" each time of closing, further improving the overall service life and sealing effect of the valve body seal.

[0019] 2. For this protective sealed stop valve, through the arranged top-sealing device, it can provide a soft material to close the end face of the output pipe with a soft material, realizing "soft sealing". And in the stage when the valve body is opened, the soft material will shrink into the "protection space", thereby ensuring that the soft material will not be corroded by the flow of the medium, further improving the efficiency of soft sealing, and using the double sealing of hard sealing and soft sealing to improve the overall sealing effect of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of a protective sealed stop valve proposed by the present invention;

[0021] Figure 2 It is a schematic diagram of the overall sectional structure of a protective sealed stop valve proposed by the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the closing device of a protective sealed stop valve proposed by the present invention;

[0023] Figure 4 It is a schematic diagram of a partial structure of the rotating assembly of a protective sealed stop valve proposed by the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the top-sealing device of a protective sealed stop valve proposed by the present invention;

[0025] Figure 6 Schematic cross-sectional position structure diagram of a protection piece of a protection type sealed stop valve proposed by the present invention;

[0026] Figure 7 Schematic connection relationship diagram of three protection pieces of a protection type sealed stop valve proposed by the present invention;

[0027] Figure 8 Schematic diagram of a pressure display mechanism of a protection type sealed stop valve proposed by the present invention;

[0028] Figure 9 Schematic structure diagram of a prompting device of a protection type sealed stop valve proposed by the present invention.

[0029] In the figure: 1, valve body; 2, input pipe; 3, output pipe; 4, control mechanism; 41, adjusting wheel; 42, valve rod; 43, valve sleeve; 44, closed round pipe; 45, rotating assembly; 451, impeller; 452, inserting pipe; 453, through hole; 454, fine water hole; 455, top sealing device; 456, sealing seat; 457, rubber ring; 458, protection piece; 459, arc spring; 460, guide rod; 461, fixing plate; 462, sliding piece; 463, return spring; 464, piston plate; 465, piston rod; 5, pressure display mechanism; 51, pressure piece; 52, pressure spring; 53, display disc; 54, pointer; 55, small gear; 56, sliding tooth plate; 57, prompting device; 571, sliding column; 572, copper pipe; 573, rotating rod. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1-9 , a protection type sealed stop valve, including a valve body 1; an input pipe 2; an output pipe 3; a control mechanism 4 for controlling the flow rate 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 includes a closing device and a sealing device; the control mechanism directly controls the closing device to perform a sealed closing on the flow rate of the valve body 1; the sealing device includes a rotating assembly 45 and a top sealing device 455, the rotating assembly 45 is used to control the closing device to perform a dislocation closing, and the top sealing device 455 is used to provide a soft material for secondary sealing of the valve body 1.

[0032] In this embodiment, the control mechanism 4 includes an adjusting wheel 41 which is rotatably connected to the valve body 1. A valve stem 42 is threadedly connected inside the adjusting wheel 41. The bottom of the valve stem 42 is connected to a valve sleeve 43. An enclosed circular tube 44 is rotatably connected inside the valve sleeve 43. The surface of the enclosed circular tube 44 abuts against the end face 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 means of threaded connection. Then the valve stem 42 will drive the downward movement of the valve sleeve 43. In a synchronous state, the enclosed circular tube 44 will also move downward. During the downward movement, the right end face will gradually block the inflow port position of the output pipe 3, thus reducing the flow rate of the medium. And when the enclosed circular tube 44 descends, the distance between the arc surface and the input pipe 2 will also decrease, which will synchronously reduce the flow rate of the medium output from the input pipe 2. Therefore, when the enclosed circular tube 44 moves up and down, the flow control effect of the traditional method will be achieved.

[0033] Furthermore, the rotating assembly 45 includes an insertion tube 452 which is slidably connected to the input pipe 2. The top of the insertion tube 452 is connected to the valve sleeve 43. A through hole 453 is provided on the insertion tube 452. The through hole 453 is communicated with the inside of the valve sleeve 43 through a fine water hole 454. An impeller 451 is arranged inside the valve sleeve 43. The impeller 451 is connected to the enclosed circular tube 44 through a connecting member. When the valve sleeve 43 moves downward, it will drive the insertion tube 452 to slide inside the input pipe 2. The surface of the input pipe 2 and the insertion tube 452 are in a sliding seal state. Then 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 arranged fine water holes 454. Then the medium will push the impeller 451 to rotate. 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 piece 462. And the sliding piece 462 is connected by a keyway, which will drive the rotation of the enclosed circular tube 44. Therefore, when the enclosed circular tube 44 is about to move down to the lowest position, at this time the medium will drive the overall rotation of the enclosed circular tube 44. So the enclosed circular tube 44 abuts against the end face of the input pipe 2 in a rotating state. At this time, it will be formed that each time the valve body 1 is closed, it will drive the enclosed circular tube 44 to contact and close with the input pipe 2 in a rotating state. So each time the contact surface with the input pipe 2 is random, and it is very unlikely that the same surface contacts and closes with the input pipe 2. This ensures that in the hard contact state, it will not be affected by the wear caused by long-term contact at the same position, thus affecting the subsequent sealing and closing effect.

[0034] In addition, the top sealing device 455 includes a sealing seat 456. The sealing seat 456 is installed on the output pipe 3. A piston rod 465 is slidably connected inside the closed circular tube 44. One end of the piston rod 465 is connected to a piston plate 464, and the other end of the piston rod 465 is connected to a sliding piece 462. A rubber ring 457 is connected to the right side of the sliding piece 462. A rubber groove matching with the rubber ring 457 is provided on the sealing seat 456. The inside of the closed circular tube 44 is connected to a fixing plate 461 through a guide rod 460. The inner surface of the rubber ring 457 is slidably connected to the outer surface of the fixing plate 461. After filling the internal space of the impeller 451, the piston plate 464 is pushed to slide rightward by the medium conveying pressure of itself. The lateral sliding of the piston plate 464 will drive the sliding piece 462 to slide synchronously through the connection with the sliding piece 462. After the sliding piece 462 slides, it will push the rubber ring 457 to move forward. The sliding piece 462 will push the rubber ring 457 to slide and insert into the card slot of the sealing seat 456, realizing the soft sealing of the abutment of the rubber ring 457.

[0035] In addition, the sliding piece 462 is slidably connected inside 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 inside the closed circular tube 44. The impeller 451 is fixedly connected to the piston plate 464. By providing the return spring 463, when the valve body 1 is opened, the sliding piece 462 is synchronously pulled to move leftward for reset, and then the piston rod 465 is driven to slide for reset. Therefore, at this time, the piston plate 464 will extrude the medium in the inner cavity of the impeller 451 into the valve body 1, and then flow out to the output pipe 3 following the flow of the medium.

[0036] It should be noted that three protection pieces 458 are slidably connected to the right end of the closed circular tube 44 through T-shaped grooves. Arc grooves are provided on the surfaces of the three protection pieces 458, and arc springs 459 are provided inside the arc grooves. A bevel surface is provided on the contact surface between the protection piece 458 and the rubber ring 457. When the rubber ring 457 contracts, the three protection pieces 458 will be subjected to the contraction force of the arc spring 459 to close the right side surface of the rubber ring 457, ensuring that the medium will not come into contact with the rubber ring 457 or reducing the direct contact between the rubber ring 457 and the medium in the flowing state of the valve body 1, reducing the corrosion of the rubber ring 457, and improving the service life of the rubber ring 457.

[0037] It should be noted that a receiving cavity is provided inside the valve body 1, and a sliding groove is opened on the inner surface of the valve body 1. 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. The setting of the receiving cavity is to accumulate a certain amount of medium, which is convenient for subsequent detection of whether the inside of the valve body 1 is in an absolutely sealed condition. The provided sliding groove is to limit the position of the valve sleeve 43 to prevent the valve sleeve 43 from rotating and misaligning when sliding up and down.

[0038] In addition, it further includes a pressure display mechanism 5. The pressure display mechanism 5 includes a pressure plate 51 which is slidably connected inside the valve body 1. A pressure spring 52 is arranged on the pressure plate 51. A sliding rack 56 is fixedly connected to the pressure plate 51. A pinion 55 is engaged with the sliding rack 56 through teeth. A pointer 54 is connected to the axis of the pinion 55 through a shaft rod. A display disk 53 is arranged on the pointer 54. The display disk 53 is installed on the valve body 1. A prompting device 57 is also arranged on the valve body 1. The pressure display mechanism 5 is provided 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 to generate a certain degree of pressure. If it is in a sealed state, the position of the pressure plate 51 will remain constant. Therefore, the angular state of the pointer 54 will be constant at this time. If there is a seal leakage inside the valve body 1, at this time the pressure plate 51 will drive the sliding rack 56 to move downward, and through the engagement of the teeth, it will drive the rotation of the pinion 55, and then drive the rotation of the pointer 54. So the operator can judge whether the inside of the valve body 1 is in an absolute sealing condition according to the rotation state of the pointer 54, so as to repair the valve body 1.

[0039] In addition, the prompting device 57 includes a rotating rod 573. One end of the rotating rod 573 is connected with a sliding column 571, and the other end of the rotating rod 573 is connected with a sphere. A copper pipe 572 is arranged below the sphere. The copper pipe 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. A plurality of triangular bodies are arranged on the surface of the sliding rack 56, and the triangular bodies are in contact with the sliding column 571. The prompting device 57 is provided to provide for the internal pressure imbalance that occurs when the valve body 1 is in use. Because under the actual working conditions, the input pressure of the medium in the input pipe 2 may be in a state of fluctuating up and down. In this state, it will affect the subsequent medium output state and cause a greater impact on the valve body 1. So when the input pressure of the medium continuously changes, at this time the internal medium pressure will push the pressure plate 51 to continuously shake up and down, and the up and down shaking of the pressure plate 51 will synchronously drive the up and down movement of the sliding rack 56. Then, by using the contact between the triangular bodies on the sliding rack 56 and the sliding column 571, it will control the continuous swinging movement of the rotating rod 573. By using the torsion spring arranged inside, it will push the sphere connected to the lower part of the rotating rod 573 to continuously hit the copper pipe 572 to generate a warning sound. So the operator can perform adaptive control on the valve body 1 according to this prompt sound.

[0040] 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 output pipe 3 from the left end inlet of the output pipe 3 and be discharged from its outlet, realizing the circulation of the medium. When it is necessary to regulate the flow rate of the valve body 1, at this time, according to the traditional technology, the rotation of the regulating wheel 41 is controlled, and the rise or fall of the valve rod 42 is controlled by means of threaded connection. Then the valve rod 42 will drive the valve sleeve 43 to move downward. In the synchronous state, the closed circular tube 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 reduce the flow rate of the medium. And at the same time when the closed circular tube 44 descends, the distance between the arc surface and the input pipe 2 will also decrease, which will synchronously reduce the flow rate of the medium output from the input pipe 2. Therefore, when the closed circular tube 44 moves up and down, the flow control effect of the traditional method can be achieved. When it is necessary to carry out sealing, at this time, the valve sleeve 43 is moved down to the lowest position and abuts against the end face of the input pipe 2. The arc surface of the closed circular tube 44 is used to abut against and seal the outlet position of the input pipe 2, realizing the overall hard contact seal of the valve body 1. When the valve sleeve 43 moves downward, it will drive the insertion tube 452 to slide inside the input pipe 2, and the surface of the input pipe 2 and the insertion tube 452 are in a sliding seal state. Then 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 arranged fine water holes 454. Then the medium will drive the impeller 451 to rotate, the impeller 451 will drive the piston plate 464 to rotate, and then drive the piston rod 465 to rotate. The piston rod 465 will drive the sliding piece 462 to rotate. And the sliding piece 462 is connected by a keyway, which will drive the closed circular tube 44 to rotate. Therefore, when the closed circular tube 44 is about to move down to the lowest position, at this time, the medium will drive the overall rotation of the closed circular tube 44. So the closed circular tube 44 abuts against the end face of the input pipe 2 in a rotating state. At this time, it will form that each time the valve body 1 is closed, it will drive the closed circular tube 44 to contact and seal with the input pipe 2 in a rotating state. So each time the contact surface with the input pipe 2 is random, and it is very unlikely that the same surface contacts and seals with the input pipe 2. This ensures that in the hard contact state, it will not be affected by long-term contact at the same position, resulting in wear and affecting the subsequent sealing effect, thereby improving the overall service life of the valve body 1.After the closed circular tube 44 is fully abutted, at this time, while the medium will drive the impeller 451 to rotate, it will also fill the internal space of the impeller 451. Then, using the medium conveying pressure of itself, it will push the piston plate 464 to slide to the right. The lateral sliding of the piston plate 464 will drive the sliding piece 462 to slide synchronously through the connection with the sliding piece 462. After the sliding piece 462 slides, it will push the rubber ring 457 to move forward. After the rubber ring 457 moves forward, it will abut against the inclined surfaces of the three protection pieces 458. As the medium pressure is continuously input, it will directly push the rubber ring 457 to squeeze the three protection pieces 458, causing the three protection pieces 458 to slide and open on the closed circular tube 44 to achieve yielding. Then, the sliding piece 462 will push the rubber ring 457 to slide and insert it into the card slot of the sealing seat 456, realizing the soft contact sealing of the rubber ring 457. Therefore, the overall double-layer structure sealing effect is achieved. One is the metal contact hard contact sealing, and the other is the soft contact sealing of the rubber pad. Finally, the overall closed sealing effect of the valve body 1 is improved, and the service life of the valve body 1 is increased, without the need to replace the vulnerable parts of the valve body 1 in a short time. And considering that during the flow of the medium through the valve body 1, the medium will cause a certain degree of corrosion to the rubber ring 457, a protection structure is provided, that is, the three protection pieces 458. When the valve body 1 is in the flowing state, at this time, the medium inside the impeller 451 will flow back from the inside of the fine water hole 454 to the inside of the insertion tube 452, and then flow into the internal cavity of the valve body 1 from the position of the through hole 453. Because at this time, when the valve body 1 is in the flowing state, the through hole 453 will move out of the inside of the input tube 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 piece 462 to move left for reset, and then driving the piston rod 465 to slide for reset. So at this time, the piston plate 464 will squeeze out the medium in the internal cavity of the impeller 451 and enter the valve body 1, and then flow out to the output tube 3 following the flow of the medium. At this time, after the rubber ring 457 contracts and enters the inside of the fixing plate 461, the three protection pieces 458 will be subjected to the contraction force of the arc spring 459 to achieve the right-side sealing of the rubber ring 457, ensuring that in the flowing state of 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, 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 to display the internal pressure change when the valve body 1 is closed, ensuring 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 instantaneously released, that is, there is still a certain amount 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 subjected to the downward thrust of the pressure spring 52, the pressure plate 51 will squeeze the internal medium, generating a certain degree of pressure. If it is in a sealed state, the position of the pressure plate 51 will remain constant. If there is a sealing leak inside the valve body 1, at this time, the pressure plate 51 will drive the sliding tooth plate 56 to move downward, and through the meshing of the teeth, it will drive the rotation of the small gear 55, and then drive the rotation of the pointer 54. So, the operator can judge whether the inside of the valve body 1 is in an absolute sealing condition according to the rotation state of the pointer 54, and thus perform maintenance on the valve body 1. And this technical solution also sets a prompting device 57, aiming to provide for the internal pressure imbalance that occurs when the valve body 1 is in use. Because under actual working conditions, the input pressure of the medium in the input pipe 2 may be in a state of fluctuating up and down. In this state, it will affect the subsequent medium output state and cause a greater impact on the valve body 1. So, when there is a continuous change in the input pressure of the medium, at this time, the internal medium pressure will push the pressure plate 51 to continuously shake up and down, and the up and down shaking of the pressure plate 51 will synchronously drive the up and down movement of the sliding tooth plate 56. Then, by using the contact between the triangular body on the sliding tooth plate 56 and the sliding column 571, it will control the continuous swinging movement of the rotating rod 573. Using the torsion spring provided inside, it will push the sphere connected to the lower part of the rotating rod 573 to continuously impact on the copper pipe 572, generating a warning sound. So, the operator can perform adaptive control on the valve body 1 according to this prompt sound.

[0041] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

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 and a sealing device; The control mechanism (4) 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), wherein the rotating assembly (45) is used to control the sealing device to perform dislocation sealing, and the top sealing device (455) is used to provide a soft material to perform secondary sealing of the valve body (1); The control mechanism (4) 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; 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.

2. A protective sealing stop valve according to claim 1, 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).

3. A protective sealing stop valve according to claim 2, 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).

4. A protective sealing stop valve according to claim 3, 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).

5. A protective sealing stop valve according to claim 4, 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).

6. A 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).

7. A protective sealing stop valve according to claim 6, 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