Fire hydrant valve body

Abstract

The application discloses a fire hydrant valve body and relates to the technical field of valves.The fire hydrant valve body comprises a valve pipe, a cleaning unit, a valve rod assembly and a scraping assembly.The valve rod assembly comprises a mounting shell arranged at the top of the valve pipe and a rotating piece arranged in the mounting shell.The scraping assembly is arranged at the bottom of the valve rod assembly and is rotatably connected with the valve pipe.When the valve is opened by rotating the valve rod assembly, the scraping assembly in the valve rod assembly rotates reversely, effectively scraping the impurities on the inner wall of the ball valve core, preventing corrosion caused by the adsorption of the impurities, and discharging the impurities with water flow, thereby reducing the maintenance frequency.When the ball valve core rotates, the sealing assembly is extruded, the compensation assembly provides a reverse extrusion force, and the sealing assembly is tightly attached to the outer wall of the ball valve core, so that the sealing property is maintained even if the sealing ring is worn, leakage caused by wear is avoided, automatic sealing compensation is realized, and the sealing property is further enhanced by the multistage sealing design.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to a fire hydrant valve body. BACKGROUND

[0002] The fire hydrant is a fire-fighting equipment used only in emergency situations, so the valve body is prone to scale accumulation, which leads to a decrease in sealing performance, water leakage, and even damage to the fire pipe caused by impurities and scale entering the fire pipe. Therefore, the fire hydrant valve body focuses on sealing performance and cleanliness. The ball valve, as a commonly used type of valve in fire hydrants, controls the flow of water by rotating the ball core. The sealing performance and cleanliness of the ball valve directly affect the reliability and service life of the fire hydrant.

[0003] The existing fire hydrant ball valve sealing mainly relies on the sealing ring wrapped around the outside of the ball core. However, after multiple uses, the rotation of the ball core can cause wear between the sealing ring and the ball core, thereby reducing the sealing performance. In addition, the ball valve cannot clean the impurities and scale adhering to the inner wall of the ball core during use. Long-term accumulation can cause the impurities to corrode the ball core, leading to a decrease in sealing performance. This not only affects the normal use of the fire hydrant but also may cause water leakage and even damage to the fire pipe in emergency situations, affecting the overall performance of the fire system. SUMMARY

[0004] In view of the above-mentioned problems existing in the existing fire hydrant valve body, the present application is proposed.

[0005] Therefore, the present application provides a fire hydrant valve body, which aims to solve the problem of the fire hydrant ball valve that the sealing performance decreases due to wear between the sealing ring and the ball core, and the impurities and scale adhering to the inner wall of the ball core cannot be cleaned, which can cause long-term accumulation and corrosion of the ball core, affecting the normal use of the fire hydrant.

[0006] To solve the above-mentioned technical problems, the present application provides the following technical scheme: a fire hydrant valve body, comprising a valve pipe; a cleaning unit, comprising a valve stem assembly rotatably arranged at the top of the valve pipe, and a scraping assembly rotatably arranged at the bottom of the valve stem assembly, and the scraping assembly is rotatably connected with the valve pipe; the valve stem assembly comprises a mounting shell arranged at the top of the valve pipe, a rotating piece rotatably arranged in the mounting shell, an upper tooth disc arranged on the outer diameter of the rotating piece, a gear one arranged in the upper tooth disc, a gear two arranged on the outer diameter of the gear one, and a lower tooth disc arranged on the outer diameter of the gear two, and the gear one and the gear two are connected with the mounting shell through the lower tooth disc; a sealing compensation unit, comprising a compensation assembly arranged on both sides of the valve pipe, and a sealing assembly arranged on the compensation assembly, and the sealing assembly is slidably connected with the valve stem assembly.

[0007] As a preferred scheme of the fire hydrant valve body of the present application, the bottom of the lower tooth disc is provided with a connecting sleeve ring, and the connecting sleeve ring is rotatably connected with the rotating piece.

[0008] As a preferred scheme of the fire hydrant valve body, the bottom of the connecting sleeve ring is provided with a ball valve core, and the ball valve core is in sliding connection with the valve pipe.

[0009] As a preferred scheme of the fire hydrant valve body, the scraping assembly comprises a rotating rod arranged at the bottom of the rotating piece, an arc-shaped rotating piece arranged at the outer diameter of the rotating rod, and a closing piece arranged at the top and bottom of the ball valve core, and the closing piece is in rotating connection with the rotating piece.

[0010] As a preferred scheme of the fire hydrant valve body, the compensation assembly comprises connecting pipes arranged at both sides of the valve pipe, a closing plate arranged at one side of the connecting pipe, and an inner pipe arranged in the connecting pipe.

[0011] As a preferred scheme of the fire hydrant valve body, the inner part of the inner pipe is provided with a limiting groove, the inner part of the limiting groove is provided with a reset spring, the other end of the reset spring is provided with a push rod, and the push rod is in sliding connection with the limiting groove.

[0012] As a preferred scheme of the fire hydrant valve body, the sealing assembly comprises a pushing plate arranged at one end of the push rod, a connecting plate two arranged at one side of the pushing plate, and a connecting plate one arranged at the other end of the connecting plate two, and the connecting plate one is connected with the inner pipe.

[0013] As a preferred scheme of the fire hydrant valve body, the outer diameter of the connecting plate one is provided with a sealing gasket two, and the sealing gasket two is connected with the inner pipe.

[0014] As a preferred scheme of the fire hydrant valve body, the outer diameter of the connecting plate two is provided with a sealing gasket one, and the sealing gasket one is in sliding connection with the push rod.

[0015] As a preferred scheme of the fire hydrant valve body, one side of the pushing plate is provided with a sealing ring strip, the outer diameter of the sealing ring strip is provided with a sealing auxiliary strip, and the sealing auxiliary strip is connected with the pushing plate, and the sealing ring strip and the sealing auxiliary strip are in sliding connection with the ball valve core.

[0016] The beneficial effects of the present application: when the fire hydrant needs to be used, when the valve stem assembly is rotated to open the valve, the internal scraping assembly rotates in the opposite direction, effectively scraping the impurities in the inner wall of the ball valve core, preventing corrosion caused by impurity adsorption, and at the same time, the impurities are discharged with the water flow, reducing the maintenance frequency, and the ball valve core is rotated to extrude the sealing assembly, the compensation assembly provides a reverse extrusion force, so that the sealing assembly tightly fits the outer wall of the ball valve core, even if the sealing ring strip is worn, the sealing property can be maintained, leakage caused by wear can be avoided, automatic sealing compensation can be realized, and the multi-stage sealing design further enhances the sealing performance, avoids the problem of reduced sealing property caused by wear and impurity adsorption of the traditional ball valve, and improves the service life of the fire hydrant, reduces maintenance cost, reduces water resource waste caused by leakage, and improves overall use efficiency and environmental protection performance. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 It is a schematic diagram of the overall structure of the fire hydrant valve body of the present application.

[0019] Figure 2 It is a schematic diagram of the internal structure of the fire hydrant valve body of the present application.

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the fire hydrant valve body of the present application.

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the fire hydrant valve body of the present application. Figure 3 It is a schematic diagram of the enlarged structure at A of the fire hydrant valve body of the present application.

[0022] Figure 5 It is a schematic diagram of the cross-sectional exploded structure of the supplementary assembly of the fire hydrant valve body of the present application.

[0023] Figure 6 It is a schematic diagram of the exploded structure of the cleaning assembly of the fire hydrant valve body of the present application.

[0024] Figure 7 It is a schematic diagram of the side view cross-sectional structure of the fire hydrant valve body of the present application.

[0025] Figure 8 It is a schematic diagram of the enlarged structure at B of the fire hydrant valve body of the present application. Figure 7

[0026] ​100, valve pipe; 200, cleaning unit; 201, valve rod assembly; 2011, mounting shell; 2012, rotating piece; 2013, upper tooth disc; 2014, gear one; 2015, gear two; 2016, lower tooth disc; 2017, connecting sleeve ring; 2018, ball valve core; 202, scraping assembly; 2021, rotating rod; 2022, arc-shaped rotating piece; 2023, closing piece; 300, sealing compensation unit; 301, compensation assembly; 3011, connecting pipe; 3012, closing plate; 3013, inner pipe; 3014, limiting groove; 3015, reset spring; 3016, push rod; 302, sealing assembly; 3021, connecting plate one; 3022, connecting plate two; 3023, push plate; 3024, sealing ring strip; 3025, sealing auxiliary strip; 3026, sealing gasket one; 3027, sealing gasket two. DETAILED DESCRIPTION

[0027] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0028] Embodiment 1, refer to Figure 1 Figure 3 The first embodiment of the present application provides a fire hydrant valve body, which comprises a valve pipe 100, a cleaning unit 200, and a sealing compensation unit 300.

[0029] The cleaning unit 200 comprises a valve rod assembly 201 rotatably arranged at the top of the valve pipe 100, and a scraping assembly 202 rotatably arranged at the bottom of the valve rod assembly 201, and the scraping assembly 202 is rotatably connected with the valve pipe 100.

[0030] The sealing compensation unit 300 comprises a compensation assembly 301 arranged on both sides of the valve pipe 100, and a sealing assembly 302 arranged on the compensation assembly 301, and the sealing assembly 302 is slidably connected with the valve rod assembly 201. When the fire hydrant is needed to be used, the valve rod assembly 201 is rotated to open the valve to discharge water, and at the same time the scraping assembly 202 at the bottom of the valve rod assembly 201 is rotated in the opposite direction in the ball valve core 2018 inside the valve rod assembly 201, so that the scraping assembly 202 can scrape the inner wall of the ball valve core 2018, preventing impurities from being adsorbed in the ball valve core 2018 for a long time, causing the ball valve core 2018 to be corroded.

[0031] ​By opening the valve through rotating the valve stem assembly 201, the scraping assembly 202 is counter-rotated to clean the inside of the valve stem assembly 201, and the impurities are cleaned out along with the water flow, effectively avoiding damage to the valve stem assembly 201 due to impurities adsorbed in the water. At the same time, when the valve stem assembly 201 is rotated, the ball valve core 2018 is squeezed towards the sealing assembly 302 while rotating, and the sealing assembly 302 generates a counter-pressing force due to the action of the compensation assembly 301, so that the sealing assembly 302 can still adhere to the outer wall of the ball valve core 2018 after being squeezed by the ball valve core 2018. At the same time, during the long-term rotation of the ball valve core 2018, the ball valve core 2018 is constantly rubbed with the sealing assembly 302, causing the sealing ring 3024 inside the sealing assembly 302 to be worn out. However, under the action of the compensation assembly 301, the sealing assembly 302 can always adhere to the outer wall of the ball valve core 2018, ensuring that no gap is generated between the ball valve core 2018 and the sealing assembly 302, and the sealing assembly 302 is effectively sealed, ensuring the sealing between the valve stem assembly 201 and the sealing assembly 302.

[0032] During use, when the fire hydrant needs to be used, the valve stem assembly 201 is rotated to open the valve stem assembly 201 to allow water to flow out, and at the same time the valve stem assembly 201 is rotated to open, the scraping assembly 202 at the bottom of the valve stem assembly 201 is counter-rotated in the ball valve core 2018 inside the valve stem assembly 201, so that the scraping assembly 202 can scrape the inner wall of the ball valve core 2018, preventing impurities from being adsorbed in the ball valve core 2018 for a long time, causing the ball valve core 2018 to be corroded.

[0033] When the valve is opened by rotating the valve stem assembly 201, the scraping assembly 202 rotates in the opposite direction to clean the inside of the valve stem assembly 201, and the impurities are removed along with the water flow, effectively preventing the valve stem assembly 201 from being damaged due to impurities in the water. At the same time, when the valve stem assembly 201 is rotated, the ball valve core 2018 is squeezed towards the sealing assembly 302 during rotation. The sealing assembly 302 is squeezed by the ball valve core 2018 and can still adhere to the outer wall of the ball valve core 2018 due to the counteracting force of the compensation assembly 301. During the long-term rotation of the ball valve core 2018, the ball valve core 2018 is constantly rubbed against the sealing assembly 302, causing the sealing ring 3024 inside the sealing assembly 302 to wear out. However, the sealing assembly 302 can always adhere to the outer wall of the ball valve core 2018 due to the compensation assembly 301, ensuring that there is no gap between the ball valve core 2018 and the sealing assembly 302. The multiple seals of the sealing assembly 302 effectively ensure the sealing between the valve stem assembly 201 and the sealing assembly 302, preventing the sealing of traditional ball valves from being compromised due to wear and tear of the sealing ring and impurities. This also improves the service life of the fire hydrant, reduces maintenance costs, reduces water waste caused by leaks, and improves overall efficiency and environmental performance.

[0034] Embodiment 2, refer to Figure 1 Figure 6 The second embodiment of the present application is different from the first embodiment in that the valve stem assembly 201 includes a mounting shell 2011 arranged at the top of the valve pipe 100, a rotating member 2012 arranged inside the mounting shell 2011, an upper tooth disc 2013 arranged on the outer diameter of the rotating member 2012, a gear one 2014 arranged inside the upper tooth disc 2013, a gear two 2015 arranged on the outer diameter of the gear one 2014, and a lower tooth disc 2016 arranged on the outer diameter of the gear two 2015. The gear one 2014 and the gear two 2015 are connected to the mounting shell 2011 through the lower tooth disc 2016. The bottom of the lower tooth disc 2016 is provided with a connecting sleeve ring 2017, and the connecting sleeve ring 2017 is connected to the rotating member 2012. The bottom of the connecting sleeve ring 2017 is provided with a ball valve core 2018, and the ball valve core 2018 is connected to the valve pipe 100.

[0035] ​Further, the scraping assembly 202 includes a rotating rod 2021 arranged at the bottom of the rotating member 2012, an arc-shaped rotating member 2022 arranged on the outer diameter of the rotating rod 2021, and a closing member 2023 rotatably arranged at the top and bottom of the ball valve core 2018, and the closing member 2023 is rotatably connected with the rotating member 2012. When the fire hydrant is used, the rotating member 2012 is rotated by the operator, and the upper tooth disc 2013 on the outer diameter of the rotating member 2012 also rotates at the same time, and the gear one 2014 in the upper tooth disc 2013 also rotates in meshing with the upper tooth disc 2013. In the process of rotating the upper tooth disc 2013, the gear two 2015 also rotates to make the lower tooth disc 2016 with the connecting sleeve ring 2017 rotate together with the ball valve core 2018, so as to open the fire hydrant. At the same time of rotating the rotating member 2012 to open the fire hydrant, the rotating rod 2021 at the bottom of the rotating member 2012 and the arc-shaped rotating member 2022 also rotate together with the rotating member 2012, so as to make the arc-shaped rotating member 2022 rotate and scrape the inner wall of the ball valve core 2018, prevent impurities from adhering to the inner wall of the ball valve core 2018, and corrode the ball valve core 2018. At the same time of rotating the rotating member 2012 to open the ball valve core 2018, the rotating rod 2021 and the arc-shaped rotating member 2022 also rotate in the opposite direction, so as to clean the inner wall of the ball valve core 2018, and at the same time, the cleaned impurities flow out together with the water flow.

[0036] In use, when the fire hydrant is used, the rotating member 2012 is rotated by the operator, and the upper tooth disc 2013 on the outer diameter of the rotating member 2012 also rotates at the same time, and the gear one 2014 in the upper tooth disc 2013 also rotates in meshing with the upper tooth disc 2013. In the process of rotating the upper tooth disc 2013, the gear two 2015 also rotates to make the lower tooth disc 2016 with the connecting sleeve ring 2017 rotate together with the ball valve core 2018, so as to open the fire hydrant. At the same time of rotating the rotating member 2012 to open the fire hydrant, the rotating rod 2021 at the bottom of the rotating member 2012 and the arc-shaped rotating member 2022 also rotate together with the rotating member 2012, so as to make the arc-shaped rotating member 2022 rotate and scrape the inner wall of the ball valve core 2018, prevent impurities from adhering to the inner wall of the ball valve core 2018, and corrode the ball valve core 2018. At the same time of rotating the rotating member 2012 to open the ball valve core 2018, the rotating rod 2021 and the arc-shaped rotating member 2022 also rotate in the opposite direction, so as to clean the inner wall of the ball valve core 2018, and at the same time, the cleaned impurities flow out together with the water flow, effectively scrape the impurities on the inner wall of the ball valve core 2018, prevent corrosion caused by impurity adsorption, and at the same time, the impurities are discharged with the water flow, reducing the maintenance frequency.

[0037] The remaining structure is the same as that of example 1.

[0038] Embodiment 3, refer to Figure 1 Figure 8 For the third embodiment of the present application, which is different from the second embodiment, the compensation assembly 301 includes a connecting pipe 3011 arranged on both sides of the valve pipe 100, a closing plate 3012 arranged on one side of the connecting pipe 3011, and an inner pipe 3013 arranged inside the connecting pipe 3011. The inner pipe 3013 is internally provided with a limiting groove 3014, and the limiting groove 3014 is internally provided with a return spring 3015. The other end of the return spring 3015 is provided with a push rod 3016, and the push rod 3016 is in sliding connection with the limiting groove 3014.

[0039] Further, the sealing assembly 302 includes a push plate 3023 arranged at one end of the push rod 3016, a connecting plate two 3022 arranged on one side of the push plate 3023, and a connecting plate one 3021 arranged at the other end of the connecting plate two 3022. The connecting plate one 3021 is connected with the inner pipe 3013. The outer diameter of the connecting plate one 3021 is provided with a sealing gasket two 3027, and the sealing gasket two 3027 is connected with the inner pipe 3013. The outer diameter of the connecting plate two 3022 is provided with a sealing gasket one 3026, and the sealing gasket one 3026 is in sliding connection with the push rod 3016. One side of the push plate 3023 is provided with a sealing ring strip 3024, and the outer diameter of the sealing ring strip 3024 is provided with a sealing auxiliary strip 3025, and the sealing auxiliary strip 3025 is connected with the push plate 3023. The sealing ring strip 3024 and the sealing auxiliary strip 3025 are in sliding connection with the ball valve core 2018. During the long-time rotation of the ball valve core 2018, the ball valve core 2018 is always in friction with the sealing ring strip 3024 on the outer diameter, so that the sealing ring strip 3024 is consumed. During the friction and consumption of the sealing ring strip 3024, the return spring 3015 inside the inner pipe 3013 presses the push rod 3016, so that the push rod 3016 can press the push plate 3023, and the sealing ring strip 3024 on the push plate 3023 can always adhere to the outer diameter of the ball valve core 2018. When the sealing ring strip 3024 is consumed by friction, the return spring 3015 and the push rod 3016 can also press the push plate 3023, so that the sealing ring strip 3024 always adheres to the surface of the ball valve core 2018, thereby ensuring the sealing of the ball valve core 2018. At the same time, the sealing auxiliary strip 3025 on the outer diameter of the sealing ring strip 3024 also adheres between the ball valve core 2018 and the inner pipe 3013, further increasing the sealing of the ball valve core 2018. The sealing gasket one 3026 and the sealing gasket two 3027 on the connecting plate two 3022 and the connecting plate one 3021 perform multiple sealing protection, preventing the ball valve core 2018 from being damaged during long-time use, thereby causing sealing gaps and water leakage.

[0040] ​During use, during long-time rotation of the ball valve core 2018, the ball valve core 2018 is always in friction with the sealing ring 3024 on the outer diameter, so that the sealing ring 3024 is consumed, and during the friction consumption of the sealing ring 3024, the reset spring 3015 inside the inner tube 3013 presses the push rod 3016, so that the push rod 3016 can press the push plate 3023, so that the sealing ring 3024 on the push plate 3023 can always adhere to the outer diameter of the ball valve core 2018, and when the sealing ring 3024 is consumed by friction, the reset spring 3015 and the push rod 3016 can also press the push plate 3023, so that the sealing ring 3024 is always adhered to the surface of the ball valve core 2018, thereby ensuring the sealing of the inside of the ball valve core 2018, and the sealing auxiliary ring 3025 on the outer diameter of the sealing ring 3024 is also adhered between the ball valve core 2018 and the inner tube 3013, further increasing the sealing of the inside of the ball valve core 2018, and through the multiple sealing protection of the sealing gasket one 3026 and the sealing gasket two 3027 on the connecting plate two 3022 and the connecting plate one 3021, prevent the ball valve core 2018 from being damaged during long-time use, thereby causing a gap in the sealing and a water leakage, to achieve automatic sealing compensation, and the multi-stage sealing design further enhances the sealing performance, avoids the problem of sealing performance decline caused by wear of the sealing ring and adsorption of impurities in the traditional ball valve, and also improves the service life of the fire hydrant and reduces the maintenance cost.

[0041] The rest of the structure is the same as that of Example 2.

[0042] It should be noted that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A hydrant valve body comprising a valve tube (100), characterized in that: Also include, The cleaning unit (200) includes a valve stem assembly (201) rotatably arranged at the top of the valve pipe (100), and a scraping assembly (202) rotatably arranged at the bottom of the valve stem assembly (201), and the scraping assembly (202) is rotatably connected with the valve pipe (100); The valve stem assembly (201) comprises a mounting shell (2011) arranged at the top of the valve pipe (100), a rotating piece (2012) rotatably arranged in the mounting shell (2011), an upper tooth disc (2013) arranged on the outer diameter of the rotating piece (2012), a gear one (2014) arranged in the upper tooth disc (2013), a gear two (2015) arranged on the outer diameter of the gear one (2014), and a lower tooth disc (2016) arranged on the outer diameter of the gear two (2015), and the gear one (2014) and the gear two (2015) are connected with the mounting shell (2011) through the lower tooth disc (2016); The bottom of the lower tooth disc (2016) is provided with a connecting sleeve ring (2017), and the connecting sleeve ring (2017) is rotatably connected with the rotating piece (2012), the bottom of the connecting sleeve ring (2017) is provided with a ball valve core (2018), and the ball valve core (2018) is slidably connected with the valve pipe (100); The scraping assembly (202) comprises a rotating rod (2021) arranged at the bottom of the rotating piece (2012), an arc-shaped rotating piece (2022) arranged on the outer diameter of the rotating rod (2021), and a closing piece (2023) rotatably arranged at the top and bottom of the ball valve core (2018), and the closing piece (2023) is rotatably connected with the rotating piece (2012); The sealing compensation unit (300) comprises a compensation assembly (301) arranged on both sides of the valve pipe (100), and a sealing assembly (302) arranged on the compensation assembly (301), and the sealing assembly (302) is slidably connected with the valve stem assembly (201); The compensation assembly (301) comprises a connecting pipe (3011) arranged on both sides of the valve pipe (100), a closing plate (3012) arranged on one side of the connecting pipe (3011), and an inner pipe (3013) arranged in the connecting pipe (3011); The inner pipe (3013) is provided with a limiting groove (3014) in the inside, the limiting groove (3014) is provided with a reset spring (3015) in the inside, the other end of the reset spring (3015) is provided with a push rod (3016), and the push rod (3016) is slidably connected with the limiting groove (3014); The sealing assembly (302) comprises a push plate (3023) arranged at one end of the push rod (3016), a connecting plate two (3022) arranged on one side of the push plate (3023), and a connecting plate one (3021) arranged at the other end of the connecting plate two (3022), and the connecting plate one (3021) is connected with the inner pipe (3013).

2. The hydrant valve body of claim 1, wherein: The outer diameter of the connecting plate one (3021) is provided with a sealing gasket two (3027), and the sealing gasket two (3027) is connected with the inner pipe (3013).

3. The valve body of claim 2, wherein: The outer diameter of the connecting plate two (3022) is provided with a sealing gasket one (3026), and the sealing gasket one (3026) is in sliding connection with the push rod (3016).

4. The hydrant valve body of claim 3, wherein: One side of the push plate (3023) is provided with a sealing ring strip (3024), the outer diameter of the sealing ring strip (3024) is provided with a sealing auxiliary strip (3025), and the sealing auxiliary strip (3025) is connected with the push plate (3023), and the sealing ring strip (3024) and the sealing auxiliary strip (3025) are in sliding connection with the ball valve core (2018).

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