Self-sealing stop valve

Abstract

The utility model relates to the technical field of sealing stop valves, and discloses a self-sealing stop valve which is characterized in that a flow channel is arranged in a valve body, and a valve clack is arranged in the flow channel; the valve rod is arranged at the top of the valve clack, the valve rod is connected with the valve clack, and the valve rod is arranged to drive the valve clack to move in the vertical direction; the multiple packing assemblies are arranged on the outer side of the valve rod in a sleeving mode, the packing assemblies are connected with the valve rod, and the packing assemblies are configured to apply pre-tightening force to the valve rod; the supporting structure is arranged on the top of the valve body, and the supporting structure is connected with the valve body through a bolt and a nut after being sleeved with the valve rod. The driving part is arranged on the top of the supporting structure, the driving part is connected with the supporting structure and the valve rod, and the driving part is arranged to drive the valve rod to move in the vertical direction. Through the design of the valve clack, the packing assembly, the supporting structure and the driving part, excellent sealing performance is provided for the stop valve, meanwhile, the stability of the valve rod is enhanced, and the service life of the stop valve is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sealing stop valve, specifically, relate to a self sealing stop valve. BACKGROUND

[0002] The stop valve is a common fluid control equipment, and is widely used in petroleum, chemical industry, electric power and other fields, and is used for cutting off or adjusting medium flow. The traditional stop valve usually adopts the packing sealing mode, and the valve stem drives the valve clapper to realize opening and closing.

[0003] However, under the working conditions of high pressure, high temperature or frequent opening and closing, the traditional stop valve may have problems of sealing performance decline, unstable driving and inconvenient maintenance, which affect its long-term reliability and service life. At present, the sealing performance of the existing stop valve depends on the compression degree of the packing assembly, and long-term use may cause leakage due to packing wear or loosening. In addition, the support structure of part of the stop valve is insufficient in strength, and is easy to loosen and deform under high pressure or vibration environment, which affects the stable driving of the valve stem and causes the valve clapper to be unable to accurately open and close.

[0004] Therefore, it is urgent to invent a stop valve with self-sealing function to solve the problems that the existing stop valve has sealing performance decline under high pressure, high temperature or frequent opening and closing working conditions, and the insufficient strength of the support structure causes the valve stem to be unstable, thereby affecting the accurate opening and closing of the valve clapper and the long-term reliability of the valve. UTILITY MODEL CONTENTS

[0005] In view of the above problems, the utility model provides a self-sealing stop valve to solve the problems that the existing stop valve has sealing performance decline under high pressure, high temperature or frequent opening and closing working conditions, and the insufficient strength of the support structure causes the valve stem to be unstable, thereby affecting the accurate opening and closing of the valve clapper and the long-term reliability of the valve.

[0006] The utility model provides a self-sealing stop valve, which comprises:

[0007] The valve body, the valve clapper, the valve stem, the packing assembly, the support structure and the driving part are arranged in the valve body.

[0008] The valve body is internally provided with a flow channel, and the valve clapper is arranged inside the flow channel.

[0009] The valve stem is arranged at the top of the valve clapper and connected with the valve clapper, wherein the valve stem is configured to drive the valve clapper to move in the vertical direction.

[0010] The packing assembly is arranged in several numbers, and the several packing assemblies are arranged outside the valve stem and connected with the valve stem, and the packing assembly is configured to apply a pre-tightening force to the valve stem.

[0011] The support structure is arranged at the top of the valve body, and the support structure is connected with the valve body based on the bolt and the nut after being sleeved with the valve stem.

[0012] The driving part is arranged on the top of the support structure, and is connected with the support structure and the valve rod respectively. The driving part is configured to drive the valve rod to move in the vertical direction.

[0013] Further, the valve body further comprises:

[0014] The valve cover is arranged on the top of the valve body, and is connected with the valve body;

[0015] The sealing ring is arranged on the outer side of the valve cover, and is connected with the valve cover;

[0016] The support plate is arranged between the valve cover and the valve body, and is connected with the valve cover and the valve body respectively;

[0017] The four open rings are arranged between the valve cover and the support plate, and are connected with the valve cover and the support plate respectively.

[0018] Further, the packing assembly comprises:

[0019] The packing sleeve is sleeved on the outer side of the valve rod, and is connected with the valve rod and the valve cover respectively;

[0020] The packing is arranged in the interior of the packing sleeve;

[0021] The joint bolts are arranged in plurality, and the joint bolts are sleeved on the outer side of the packing sleeve in parallel along the direction of the valve rod, and are connected with the packing sleeve;

[0022] The packing rod is arranged between two joint bolts, and one end of the packing rod is connected with the adjacent joint bolt based on the cylindrical pin after penetrating through the joint bolt.

[0023] Further, the packing has a multi-layer structure, and the material of the packing is flexible graphite material.

[0024] Further, the support structure comprises:

[0025] The bracket is sleeved on the outer side of the packing sleeve, and the bottom of the bracket is fixedly connected with the valve rod based on the nut and the bolt;

[0026] The set screw is arranged in the middle and upper part of the bracket interior, and is connected with the top of the valve rod, wherein the set screw is provided with a protrusion on one side of the valve rod;

[0027] The bearings are arranged in two groups, and the two groups of bearings are oppositely arranged at both ends of the protrusion along the arrangement direction of the set screw, and are connected with the outer side wall of the set screw and the inner side wall of the bracket interior respectively;

[0028] The oil cup is arranged in the oil channel formed in the outer side wall of the middle and upper part of the bracket, and is configured to supply oil to the bearings;

[0029] A bearing gland is sleeved on the outer side of the retaining bolt, and the bearing gland is connected to the top of the bearing away from the oil cup.

[0030] Further, the valve disc comprises:

[0031] A valve disc cap is arranged at the end of the valve stem away from the retaining screw, and the valve disc cap is connected to the bottom of the valve stem.

[0032] A disc body is sleeved on the outer side of the valve disc cap, and the disc body is connected to the outer side wall of the valve disc cap.

[0033] The connecting protrusion is arranged at the middle and upper part of the outer side of the valve disc cap away from the valve stem.

[0034] Further, the valve disc cap and the disc body are made of 420 stainless steel.

[0035] Further, the driving part comprises:

[0036] A driving handle is arranged at the top of the support, and the driving handle is connected to the top of the retaining screw.

[0037] A driving motor is arranged at the top of the support, and the driving motor is connected to the support, and the driving motor is configured to drive the driving handle to rotate in a set direction.

[0038] Compared with the prior art, the beneficial effects of the utility model lie in that the filler assembly exerts a pre-tightening force on the valve stem, so that the valve stem can still maintain good sealing performance in a high-pressure or high-temperature environment, effectively reducing the risk of medium leakage. Compared with the traditional stop valve, the sealing structure is more stable, and even in the case of long-term operation or frequent opening and closing, it can maintain high sealing reliability and prolong the service life. In addition, by adopting the bolt connection mode of the support structure and the valve body, the overall rigidity is improved, so that the movement of the valve stem in the vertical direction is more stable, avoiding the problem of inaccurate opening and closing of the valve disc caused by structural loosening or deformation. This optimized design ensures that the valve can still operate reliably under high pressure, strong vibration or large flow impact conditions, improving the safety and working efficiency of the system. Finally, the modular design of the filler assembly facilitates disassembly and replacement, simplifies the maintenance process, reduces downtime and maintenance costs. Compared with the complex filler adjustment mode of the traditional stop valve, the structure of the utility model is easier to operate and maintain, making it suitable for various industrial scenes, especially in long-term operation or frequent replacement of fillers. It shows better practical value. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 A structure diagram of a self-sealing stop valve provided by the utility model embodiment is shown in the drawings.

[0040] Figure 2The utility model provides a valve body cross section structure schematic diagram for the embodiment of the utility model,

[0041] Figure 3 The utility model provides a support plate cross section structure schematic diagram for the embodiment of the utility model,

[0042] Figure 4 The utility model provides a valve cover cross section structure schematic diagram for the embodiment of the utility model,

[0043] 1, valve body, 2, valve flap, 3, valve flap and cap, 4, valve stem, 5, valve cover, 6, sealing ring, 7, four open rings, 8, support plate, 9, bolt, 10, nut, 11, packing, 12, cylindrical pin, 14, packing press sleeve, 15, packing press rod, 16, hinged bolt, 17, support, 18, bearing, 19, oil cup, 21, drive part, 23, flow channel. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0045] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0046] The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0047] In the description of the present application, it should be noted that unless otherwise expressly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] As shown in Figures 1-4 Some preferred embodiments of the utility model provide a self-sealing stop valve, comprising: valve body 1, valve clack 2, valve stem 4, packing 11 assembly, support structure and driving part 21.

[0049] Specifically, the valve body 1 is internally configured with a flow channel 23, and the valve clack 2 is configured inside the flow channel 23; the valve stem 4 is configured at the top of the valve clack 2, and the valve stem 4 is connected with the valve clack 2, wherein the valve stem 4 is configured to drive the valve clack 2 to move in the vertical direction; the packing 11 assembly is configured with several, and the several packing 11 assemblies are sleeved on the outside of the valve stem 4, the packing 11 assembly is connected with the valve stem 4, and the packing 11 assembly is configured to apply pre-tightening force to the valve stem 4; the support structure is configured at the top of the valve body 1, and the support structure is connected with the valve body 1 based on the bolt 9 and the nut 10 after sleeving the valve stem 4; the driving part 21 is configured at the top of the support structure, and the driving part 21 is connected with the support structure and the valve stem 4 respectively, and the driving part 21 is configured to drive the valve stem 4 to move in the vertical direction.

[0050] It can be understood that by providing the flow channel 23 inside the valve body 1, the valve clack 2 is located in the flow channel 23 and connected with the valve stem 4, when the valve stem 4 moves in the vertical direction under the action of the driving part 21, the valve clack 2 correspondingly opens or closes the flow channel 23, thereby realizing the control of medium flow. This structure ensures the accurate opening and closing of the valve, and is suitable for high pressure, high temperature and frequent opening and closing working conditions. In order to improve the sealing performance and operation stability, the packing 11 assembly is used to apply pre-tightening force to the valve stem 4. The packing 11 assembly is sleeved on the outside of the valve stem 4 and connected with it, which can continuously provide axial sealing during the movement of the valve stem 4, reducing the leakage problem caused by the wear or loosening of the packing 11. At the same time, this structure can reduce the influence of external environment on the sealing performance, and improve the sealing reliability of the stop valve in the long-term use process. Finally, the bolt 9 and the nut 10 connection mode between the support structure and the valve body 1 improves the overall strength and rigidity of the valve. The support structure is sleeved with the valve stem 4, so that it can stably operate in the vertical direction, avoiding the opening and closing failure problem of the valve clack 2 caused by structure loosening or deformation. At the same time, the driving part 21 is configured at the top of the support structure and connected with the valve stem 4, so that the valve stem 4 moves accurately in the vertical direction under the action of the driving part 21, realizing efficient and reliable fluid control.

[0051] Specifically, the valve body 1 further comprises: a valve cover 5 arranged at the top of the valve body 1, the valve cover 5 being connected with the valve body 1; a sealing ring 6 arranged outside the valve cover 5, the sealing ring 6 being connected with the valve cover 5; a support plate arranged between the valve cover 5 and the valve body 1, the support plate being connected with the valve cover 5 and the valve body 1 respectively; a four-open ring 7 arranged between the valve cover 5 and the support plate, the four-open ring 7 being connected with the valve cover 5 and the support plate respectively.

[0052] It can be understood that through the connection of the valve cover 5 and the valve body 1, the upper sealing area of the valve is formed. The valve cover 5 serves to close the top of the valve body 1 and provides support and sealing for the internal components. The sealing ring 6 is arranged outside the valve cover 5 and connected with the valve cover 5, which is used to ensure the sealing between the valve cover 5 and the valve body 1, prevent medium leakage, and enhance the sealing effect of the valve in high pressure environment. The use of the sealing ring 6 helps to improve the overall sealing performance of the valve and ensures its reliability in long-term use. The support plate is located between the valve cover 5 and the valve body 1, and is connected with the valve cover 5 and the valve body 1 respectively, which plays a role in strengthening and supporting. The support plate helps the valve cover 5 and the valve body 1 to be tightly combined by providing uniform pressure distribution, ensuring the stability of the valve. The support plate plays an important role in the overall structure of the valve, preventing the deformation of the valve body 1 or the valve cover 5 due to pressure changes, and ensuring the long-term stable operation of the valve. The four-open ring 7 is located between the valve cover 5 and the support plate, and the four-open ring 7 is connected with the valve cover 5 and the support plate, forming a sealed structure. The design of the four-open ring 7 improves the connection strength between the valve cover 5 and the support plate, so that they can better maintain the sealing property when under pressure, avoiding leakage. The four-open ring 7 helps to distribute and withstand the pressure difference inside and outside the valve body 1, ensuring that the valve can still work normally in high pressure and high temperature environment.

[0053] It can be seen that the connection of the valve cover 5 and the valve body 1, as well as the configuration of the sealing ring 6, effectively improves the sealing performance of the valve. The sealing ring 6 is located on the outer side of the valve cover 5 and is connected with the valve cover 5, which can ensure the tight sealing between the valve cover 5 and the valve body 1, preventing medium leakage. This design enhances the sealing of the valve, especially in harsh conditions such as high pressure and high temperature, ensuring the reliable operation of the valve. Secondly, the configuration of the support plate provides support between the valve cover 5 and the valve body 1, helping to disperse the pressure between the valve body 1 and the valve cover 5, thereby increasing the stability of the overall structure. The support plate makes the connection between the valve cover 5 and the valve body 1 more firm, preventing structural deformation due to pressure changes or external vibrations, improving the load capacity and durability of the valve, ensuring the reliability of the valve during long-term use. Finally, the design of the four open rings 7 further enhances the connection strength between the valve cover 5 and the support plate, and effectively distributes the pressure difference inside and outside the valve body 1. The four open rings 7 can provide uniform force distribution when under pressure, preventing local pressure concentration and sealing failure. This design ensures that the valve can operate stably for a long time in high-pressure and high-temperature environments, improving the service life and work efficiency of the valve.

[0054] Specifically, the packing 11 assembly includes: a packing pressing sleeve 14 is sleeved on the outer side of the valve stem 4, and the packing pressing sleeve 14 is connected with the valve stem 4 and the valve cover 5 respectively; the packing 11 is arranged inside the packing pressing sleeve 14; a plurality of joint bolts 16 are provided, and the plurality of joint bolts 16 are sleeved on the outer side of the packing pressing sleeve 14 in parallel along the direction of the valve stem 4, and the joint bolts 16 are connected with the packing pressing sleeve 14; a packing pressing rod 15 is arranged between the two joint bolts 16, and one end of the packing pressing rod 15 passes through the joint bolt 16 and is connected with the adjacent joint bolt 16 based on the cylindrical pin 12.

[0055] Specifically, the packing 11 is a multi-layer structure, and the material of the packing 11 is flexible graphite material.

[0056] It can be understood that the packing 11 assembly is sleeved outside the valve stem 4 by the packing pressing sleeve 14, and is connected with the valve stem 4 and the valve cover 5. Through this design, the packing pressing sleeve 14 fixes the packing 11 and makes it tightly combined, preventing the packing 11 from loosening or deforming, so as to ensure that the packing 11 can effectively seal the contact surface between the valve stem 4 and the valve body 1, preventing medium leakage. The stability and sealing performance of the packing pressing sleeve 14 are crucial for the long-term operation of the valve, especially under high pressure and high temperature working conditions, which can maintain good sealing effect. Secondly, the joint bolt 16 is arranged side by side outside the packing pressing sleeve 14 along the direction of the valve stem 4 and is connected with the packing pressing sleeve 14. The function of the joint bolt 16 is to realize the compression of the packing 11 by adjusting the pressure of the packing pressing sleeve 14, ensuring that the packing 11 maintains appropriate compression force during work, thereby enhancing the sealing performance. The joint bolt 16 also allows fine adjustment of the packing 11 assembly, allowing the valve to be maintained and adjusted according to actual working conditions to adapt to different working environments. At the same time, the packing pressing rod 15 is located between the two joint bolts 16 and is connected with the adjacent joint bolt 16 through the cylindrical pin 12. The function of the packing pressing rod 15 is to evenly distribute the pressure exerted by the joint bolt 16 and ensure uniform contact between the packing pressing sleeve 14 and the packing 11. This structure can effectively avoid local pressure concentration and reduce the sealing failure of the packing 11 due to uneven compression. In addition, the design of the packing pressing rod 15 increases the stability and reliability of the overall structure. Finally, the packing 11 is made of multi-layer flexible graphite material, which has excellent flexibility, high temperature resistance and corrosion resistance. The multi-layer structure of graphite can provide stronger sealing effect, adapt to different temperature and pressure working requirements, and resist the erosion of medium and the influence of high temperature environment. The durability and stability of the flexible graphite packing 11 ensure the sealing effect of the valve during long-term operation, thereby greatly prolonging the service life of the valve and improving the reliability of the valve under harsh working conditions.

[0057] It can be seen that through the combination of the packing pressing sleeve 14, the packing pressing rod 15, the articulated bolt 16 and other structures, good sealing performance and adjustability are provided. The packing pressing sleeve 14 is sleeved outside the valve stem 4 and connected with the valve stem 4 and the valve cover 5, providing stable support for the packing 11 assembly. Through this connection mode, the packing pressing sleeve 14 can effectively fix the packing 11 and ensure that it maintains a good sealing state during valve operation, preventing medium leakage and improving the sealing reliability of the valve. Secondly, the articulated bolts 16 are arranged side by side along the direction of the valve stem 4 outside the packing pressing sleeve 14, which can provide uniform pressure distribution for the packing pressing sleeve 14. The articulated bolts 16 are connected with the packing pressing sleeve 14, which helps to adjust and control the pressing force of the packing 11, ensuring that the packing 11 always maintains the best sealing state during valve operation. In addition, the design of the articulated bolts 16 facilitates the sealing adjustment of the valve, making it convenient for maintenance personnel to adjust according to actual needs, thereby improving the adaptability and long-term performance of the valve. In addition, the packing pressing rod 15 is arranged between the two articulated bolts 16 and connected with the adjacent articulated bolts 16 through the cylindrical pin 12, making the packing 11 assembly structure more stable and reliable. The packing pressing rod 15 can evenly distribute pressure during valve operation, avoiding sealing failure caused by local pressure concentration and ensuring stable operation of the valve under harsh conditions such as high pressure and high temperature. This design further enhances the sealing capacity and mechanical strength of the packing 11 assembly. Finally, the packing 11 is made of multi-layer flexible graphite material, which has excellent flexibility and high temperature resistance and corrosion resistance, and can effectively resist the erosion of the medium and the influence of high temperature environment. The design of the multi-layer structure provides stronger sealing performance and longer service life, so that the packing 11 will not fail due to wear or aging during long-term operation, thereby improving the overall performance and service life of the valve.

[0058] Specifically, the support structure includes: a bracket 17 is sleeved outside the packing pressing sleeve 14, the bottom of the bracket 17 is fixedly connected with the valve stem 4 based on the nut 10 and the bolt 9; a set screw is arranged in the upper middle part of the bracket 17, and the set screw is connected with the top of the valve stem 4, wherein a protrusion is arranged on one side of the valve stem 4; two groups of bearings 18 are arranged, and the two groups of bearings 18 are arranged on both ends of the protrusion along the arrangement direction of the set screw 9, and the bearings 18 are connected with the outer side wall of the set screw 9 and the inner side wall of the bracket 17; an oil cup 19 is arranged in the oil channel formed in the outer side wall of the upper middle part of the bracket 17, and the oil cup 19 is configured to supply oil to the bearings 18; a bearing 18 gland is sleeved outside the set screw 9, and the bearing 18 gland is connected with the top of the bearing 18 away from the oil cup 19.

[0059] It can be understood that the support 17 is sleeved outside the packing gland 14 and is fixedly connected with the valve stem 4 through the nut 10 and the bolt 9. The support 17 provides additional support for the packing gland 14, ensures stable operation of the valve stem 4 during work, and avoids displacement or deformation caused by pressure changes or vibration. By fixing the support 17 with the valve stem 4, the support structure effectively improves the stability and carrying capacity of the valve, so that it can work reliably under high pressure or vibration working conditions. Secondly, the set screw is arranged in the upper middle part of the support 17 and is connected with the top of the valve stem 4. The set screw is used to fix and adjust the position of the valve stem 4, so as to ensure that the relative position of the valve stem 4 and other components does not change. The design of the set screw not only helps to maintain the stability of the valve stem 4, but also enhances the connection with the valve stem 4 through the lug structure, ensures the accurate movement of the valve stem 4 in the vertical direction, and avoids possible deviation or instability. At the same time, two groups of bearings 18 are arranged inside the support 17, respectively between the outer side wall of the set screw 9 and the inner side wall of the support 17, and are oppositely arranged at both ends of the lug. The function of these bearings 18 is to reduce the friction of the valve stem 4 during work and improve the smoothness of the valve stem 4. By arranging bearings 18 on both sides of the set screw 9, the valve stem 4 can be effectively supported, the wear of the valve stem 4 can be reduced, and the service life of the valve can be prolonged. At the same time, the design of the bearing 18 improves the smoothness and accuracy of the valve during operation, so that the valve can maintain stable performance under long-time operation. Finally, the design of the oil cup 19 and the oil channel enables the bearing 18 to be continuously lubricated, prolonging the service life and stability of the bearing 18. The oil cup 19 is arranged on the outer side wall of the upper middle part of the support 17 and is connected with the oil channel, which can provide the necessary lubricating oil for the bearing 18, reduce friction, and ensure that the bearing 18 is not affected by wear during long-term operation. The bearing 18 gland sleeve is sleeved outside the set screw 9 and is connected with the top of the bearing 18, so that the lubrication function of the oil cup 19 is not hindered, thereby improving the overall operation efficiency and reliability of the support structure.

[0060] It can be seen that the support 17 is sleeved outside the filler pressing sleeve 14 and fixedly connected with the valve stem 4 through the nut 10 and the bolt 9, effectively enhancing the stability and carrying capacity of the valve. The design of the support 17 ensures that the valve stem 4 can remain stable during operation and is not affected by external pressure or vibration, avoiding displacement or deformation of the valve stem 4 and improving the overall reliability of the valve. This structure can continuously and stably operate in high-pressure and high-temperature environments, improving the working efficiency and service life of the valve. Secondly, the configuration of the set screw and the design of the protrusion on the top of the valve stem 4 further ensure the positional stability of the valve stem 4. Through the connection of the set screw with the top of the valve stem 4, the position of the valve stem 4 can be effectively fixed to prevent it from shifting or shaking during operation. The design of the protrusion enhances the connection strength of the set screw and the valve stem 4, ensuring the precise movement of the valve stem 4 in the vertical direction, thereby ensuring the reliable opening and closing of the valve and avoiding operation errors caused by unstable valve stem 4. At the same time, the configuration and design of the bearing 18 provide additional support for the valve stem 4, reducing friction and improving the smoothness of the valve stem 4 movement. The two sets of bearings 18 are arranged between the outer wall of the set screw 9 and the inner wall of the support 17, effectively sharing the load of the valve stem 4 and avoiding excessive wear caused by excessive friction. The arrangement of the bearing 18 enhances the stability and accuracy of the valve stem 4, reduces the resistance during movement, and prolongs the service life of the valve assembly. Finally, the design of the oil cup 19 and the oil channel ensures that the bearing 18 is adequately lubricated, reducing frictional wear. The oil cup 19 is connected to the bearing 18 through the oil channel, continuously providing lubricating oil to the bearing 18 to ensure that the bearing 18 does not overheat due to lack of oil during long-term operation. The design of the bearing 18 gland ensures the effectiveness of the lubrication function and avoids external environmental pollution, improving the reliability and long-term stability of the support structure, ensuring that the valve can always operate smoothly under high load and high temperature conditions.

[0061] Specifically, the valve disc 2 comprises: a valve disc and cap 3 arranged at the end of the valve stem 4 away from the set screw, and the valve disc and cap 3 is connected to the bottom of the valve stem 4; a disc body is sleeved outside the valve disc and cap 3, and the disc body is connected to the outer wall of the valve disc and cap 3; wherein the valve disc and cap 3 is provided with a connecting protrusion at the middle and upper part away from the outer side of the valve stem 4.

[0062] Specifically, the valve disc and cap 3 and the disc body are made of 420 stainless steel.

[0063] It can be understood that the stable connection between the valve disc 2 and the valve stem 4 is ensured by the connection of the valve disc and cap 3 with the bottom of the valve stem 4. The valve disc and cap 3 is located at the end of the valve stem 4 away from the set screw, and the fixation of the valve disc 2 is realized by the connection with the bottom of the valve stem 4. This design can ensure the coordinated movement of the valve disc 2 and the valve stem 4 during opening and closing, thereby ensuring the normal opening and closing of the valve. Secondly, the valve body is sleeved outside the valve disc and cap 3 and connected with the outer wall of the valve disc and cap 3. The valve body helps the sealing function of the valve disc 2, increases the structural strength and stability of the valve. During the opening and closing of the valve, the cooperation between the valve body and the valve disc and cap 3 can effectively control the medium flow, ensure the sealing performance, and prevent the valve disc 2 from loosening or displacement during operation, thereby improving the sealing effect and working reliability of the valve. Finally, the connection protrusion is configured at the middle and upper part of the valve disc and cap 3 away from the outer side of the valve stem 4, which is used to enhance the connection strength between the valve disc and cap 3 and the valve body. The design of the connection protrusion makes the connection between the valve disc and cap 3 and the valve body more firm, avoiding the loosening caused by pressure or vibration, and ensuring the stability of the valve during long-term use. At the same time, the structure of the protrusion enhances the overall mechanical strength of the valve disc 2, so that the valve can stably operate at higher pressure and temperature.

[0064] It can be seen that the stability of the valve disc 2 and the firm connection between the valve stem 4 are ensured by the connection of the valve disc and cap 3 with the bottom of the valve stem 4. This design ensures that the valve disc 2 can move accurately and synchronously with the valve stem 4 during opening and closing, thereby effectively preventing the valve disc 2 from loosening or deviating during use, improving the sealing performance and operation accuracy of the valve, and ensuring its reliability under harsh conditions such as high pressure and high temperature. Secondly, the valve body is connected with the outer wall of the valve disc and cap 3, which enhances the sealing performance and mechanical strength of the valve disc 2. The setting of the valve body effectively increases the strength of the valve disc 2 and improves the stability of the overall structure of the valve. During the opening and closing of the valve, the cooperation of the valve body and the valve disc and cap 3 ensures the control of the medium and the precise adjustment of the flow, and effectively avoids the loosening of the valve disc 2 caused by pressure or fluid impact, thereby improving the service life and operation reliability of the valve. Finally, the connection protrusion is configured at the middle and upper part of the valve disc and cap 3 away from the outer side of the valve stem 4, which enhances the connection strength between the valve disc and cap 3 and the valve body. Through the design of the connection protrusion, the combination of the valve disc and cap 3 and the valve body is more firm, avoiding the loosening or failure of the connection caused by external vibration or pressure fluctuation. This design improves the pressure resistance of the valve disc 2 structure, ensures the stable operation of the valve under high pressure working conditions, and improves the overall safety and durability of the valve.

[0065] Specifically, the driving part 21 includes: a driving handle configured at the top of the support 17, the driving handle being connected with the top of the set screw; a driving motor arranged at the top of the support 17, the driving motor being connected with the support 17, and the driving motor being configured to drive the driving handle to rotate in a set direction.

[0066] It can be understood that by configuring the driving handle at the top of the bracket 17 and connecting it with the top of the tightening screw, the driving part 21 can stably drive the valve rod 4 to move. The design of the driving handle ensures that the driving force can be effectively transmitted to the valve rod 4, thereby controlling the opening and closing of the valve disc 2. This connection makes the interaction between the driving part 21 and the valve rod 4 more stable, ensuring that the valve can run smoothly during opening and closing, avoiding misoperation caused by unstable driving force. Secondly, the driving motor is arranged at the top of the bracket 17 and connected with the bracket 17. The driving motor drives the driving handle to rotate in a set direction by electric means. The driving motor provides a precise power source and can efficiently drive according to the needs. Through electric driving, the opening and closing operation of the valve can be more automated and accurate, reducing the error of manual operation and improving the work efficiency, especially suitable for working conditions that require quick response. Finally, the driving motor is configured to drive the driving handle to rotate in a set direction, ensuring that the driving part 21 can be flexibly adjusted according to the working conditions. The rotation direction of the motor can accurately control the movement path of the driving handle, ensuring the accuracy and consistency of the valve during opening or closing. This design not only improves the operation stability of the valve, but also makes the driving process more efficient and energy-saving, adapting to the needs of various working environments

[0067] It can be seen that by configuring the driving handle at the top of the bracket 17 and connecting it with the top of the tightening screw, the driving force is effectively transmitted. Through this connection, the driving part 21 can stably transmit power to the valve rod 4, ensuring that the valve disc 2 can move accurately and reliably during opening and closing. This design enhances the operation stability of the valve, avoiding inaccurate valve movement or failure caused by unstable driving part 21. Secondly, by arranging the driving motor at the top of the bracket 17 and connecting it with the bracket 17, the stability and efficient operation of the driving motor are ensured. The driving motor provides a powerful power source, enabling the valve to be automatically operated through electric control, greatly reducing the workload and error of manual operation. At the same time, the precise control of the driving motor can adjust the opening and closing speed and accuracy of the valve under different working conditions, improving the response speed and operation accuracy of the valve, especially in complex environments such as high pressure and high temperature. Finally, by designing the driving motor to drive the driving handle to rotate in a set direction, the valve can be flexibly adjusted according to specific needs. This design can ensure accurate control of the valve during opening and closing, avoiding excessive friction and unnecessary energy loss. The precise control of the driving part 21 not only prolongs the service life of the valve, but also enhances the overall reliability and efficiency, adapting to the high requirements of modern industry for precision and stability.

[0068] The self-sealing stop valve in each of the above embodiments applies a pre-tightening force to the valve stem 4 through the packing 11 assembly, allowing it to maintain good sealing performance in high-pressure or high-temperature environments and effectively reducing the risk of medium leakage. Compared with traditional stop valves, its sealing structure is more stable, and even in the case of long-term operation or frequent opening and closing, it can maintain high sealing reliability and prolong the service life. In addition, by adopting the bolt 9 connection method of the support structure and the valve body 1, the overall rigidity is improved, making the movement of the valve stem 4 in the vertical direction more stable, avoiding the problem of inaccurate opening and closing of the valve disc 2 due to structural looseness or deformation. This optimized design ensures that the valve can still operate reliably in high-pressure, strong vibration or large-flow impact working conditions, improving the safety and efficiency of the system. Finally, the modular design of the packing 11 assembly facilitates disassembly and replacement, simplifying the maintenance process and reducing downtime and maintenance costs. Compared with the complex packing 11 adjustment method of traditional stop valves, the structure of the utility model is easier to operate and maintain, making it suitable for various industrial scenarios, especially in long-term operation or frequent packing 11 replacement application environments, and it exhibits better practical value.

[0069] Obviously, those skilled in the art can make various modifications and variations to the utility model without departing from the spirit and scope of the utility model. Therefore, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and its equivalent technologies, the utility model also intends to include these modifications and variations.

Claims

1. A self-sealing stop valve characterized by, The utility model relates to a valve, including: Valve body, valve disc, valve rod, packing assembly, support structure and drive part; The valve body is internally arranged with a flow channel, and the valve disc is arranged inside the flow channel; The valve rod is arranged on the top of the valve disc and connected with the valve disc, wherein the valve rod is configured to drive the valve disc to move in the vertical direction; The packing assembly is arranged with several, and the several packing assemblies are sleeved on the outside of the valve rod, the packing assembly is connected with the valve rod, and the packing assembly is configured to apply pre-tightening force to the valve rod; The support structure is arranged on the top of the valve body, and the support structure is connected with the valve body through bolts and nuts after being sleeved on the valve rod; The drive part is arranged on the top of the support structure and connected with the support structure and the valve rod, and the drive part is configured to drive the valve rod to move in the vertical direction.

2. The self-sealing stop valve of claim 1, wherein The valve body further includes: The valve cover is arranged on the top of the valve body and connected with the valve body; The sealing ring is arranged on the outside of the valve cover and connected with the valve cover; The support plate is arranged between the valve cover and the valve body and connected with the valve cover and the valve body respectively; The four open rings are arranged between the valve cover and the support plate and connected with the valve cover and the support plate respectively.

3. The self-sealing stop valve of claim 2, wherein, The packing assembly includes: The packing sleeve is sleeved on the outside of the valve rod and connected with the valve rod and the valve cover respectively; The packing is arranged inside the packing sleeve; The hinge bolts are arranged with several, and the several hinge bolts are arranged side by side on the outside of the packing sleeve in the direction of the valve rod, and the hinge bolts are connected with the packing sleeve; The packing rod is arranged between the two hinge bolts, and one end of the packing rod passes through the hinge bolt and is connected with the adjacent hinge bolt through a cylindrical pin.

4. The self-sealing stop valve of claim 3, wherein The packing is a multi-layer structure, and the material of the packing is flexible graphite material.

5. The self-sealing stop valve of claim 3, wherein The support structure includes: The bracket is sleeved on the outside of the packing sleeve, and the bottom of the bracket is fixedly connected with the valve rod through nuts and bolts; The set screw is arranged in the upper middle part of the bracket, and the set screw is connected with the top of the valve rod, wherein a protrusion is arranged on one side of the set screw; The bearings are arranged with two groups, and the two groups of bearings are arranged on the two ends of the protrusion in the direction of the set screw; The oil cup is arranged inside the oil channel formed in the outer wall of the upper middle part of the bracket, and the oil cup is configured to supply oil to the bearings; The bearing pressing cover is sleeved on the outside of the set screw and connected with the top of the bearing away from the oil cup.

6. The self-sealing stop valve of claim 5, wherein, The valve disc includes: The valve disc cap is arranged on the end of the valve rod away from the set screw and connected with the bottom of the valve rod; The disc body is sleeved on the outside of the valve disc cap and connected with the outer wall of the valve disc cap; The valve disc cap is arranged with a connecting protrusion on the upper middle part away from the outside of the valve rod.

7. The self-sealing stop valve of claim 6, wherein The valve disc cap and the disc body are made of 420 stainless steel.

8. The self-sealing stop valve of claim 7, wherein, The drive part includes: The drive handle is arranged on the top of the bracket and connected with the top of the set screw; The drive motor is arranged on the top of the bracket and connected with the bracket, and the drive motor is configured to drive the drive handle to rotate in a designated direction.

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