Adjustable buffer type inclined check valve

Abstract

The invention discloses an adjustable buffer type inclined check valve, and relates to the technical field of check valves, when a medium flows in from an inlet end, close to one side of a protective appliance, of a valve body, pressure can jack up a connecting frame body to mount a valve pin shaft, the valve pin shaft drives a valve clack and the valve pin shaft to rotate upwards to open, a flow channel is completely smooth, and the medium passes through smoothly; when the inlet pressure is reduced or the outlet pressure is higher than the inlet pressure and has a backflow trend, the reverse pressure and the dead weight of the valve clack enable the valve clack to rapidly rotate downwards and be tightly attached to the valve seat block, sealing is formed, backflow is thoroughly blocked, a medium is prevented from being poured back to the upstream, and one-way flowing is stably kept. The fixing frame is matched with the valve seat block for inclined installation, the sealing effect between the valve seat block and the inner wall of the valve body is kept, an inclined installation structure is adopted, the opening and closing angle of the valve clack is small, the closing stroke is short, valve closing is faster, the sealing face is arranged in an inclined mode, the medium flow state is smoother, scouring is small, and sealing stress is even.

Description

Technical Field

[0001] This invention relates to the field of check valve technology, specifically to an adjustable buffer type tilting check valve. Background Technology

[0002] A check valve is a valve whose opening and closing element is a circular valve disc that relies on its own weight and the pressure of the medium to prevent backflow. It belongs to the category of automatic valves and is also known as a non-return valve, one-way valve, reflux valve, or isolation valve. The valve disc movement is divided into lift type and swing type. The lift check valve is structurally similar to a gate valve, except it lacks the valve stem that drives the valve disc. The medium flows in from the inlet end (bottom) and flows out from the outlet end (top). When the inlet pressure is greater than the sum of the valve disc's weight and its flow resistance, the valve is opened. Conversely, when the medium flows back, the valve is closed. The swing check valve has an angled valve disc that can rotate around an axis, and its working principle is similar to that of the lift check valve.

[0003] Existing swing check valves use a horizontal valve disc closure, which is prone to problems such as water hammer impact, causing damage to the internal parts of the check valve and leading to media leakage. Secondly, excessively fast media flow can also cause internal damage to the check valve, affecting the service life of the equipment. In addition, the valve cover is mostly connected by threads, which makes disassembly cumbersome and affects equipment maintenance, replacement and monitoring. Therefore, a new design was developed to address these problems. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides the following technical solution: an adjustable buffer-type tilting check valve, comprising a valve body. When the medium flows into the valve body from the inlet end near the protective device, flanges are fixedly connected to both sides of the valve body. A valve cover is fixedly connected to the upper side of the valve body. A positioning device is fixedly connected to the edge of the top of the valve cover. An anti-blocking device is provided in the middle of the top of the valve cover. A connecting frame is fixedly connected to the inner wall of the valve body near the valve cover. Pressure will push upwards to install a valve pin on the connecting frame. The valve pin drives the valve disc, and the valve pin rotates upwards to open, ensuring complete unobstructed flow and smooth passage of the medium. A valve pin is hinged to the outer side of the connecting frame. An auxiliary device is fixedly connected to the inner side of the valve pin. A valve disc is fixedly connected to the outer side of the auxiliary device. When the inlet pressure decreases or the outlet pressure is higher than the inlet, causing a backflow tendency, the reverse pressure and the valve disc's own weight will cause the valve disc to quickly rotate downwards, tightly fitting the valve seat block to form a seal, completely blocking the backflow and preventing the medium from flowing back upstream, thus maintaining stable unidirectional flow. A protective device is fixedly connected to the inner wall of the valve body near the flange. A fixing bracket is fixedly connected to the inner wall of the valve body near the protective device. The fixing bracket is used to support the valve seat block, allowing the fixing bracket to be installed at an angle in conjunction with the valve seat block. A valve seat block is fixedly connected to the inner side of the fixing frame to maintain the sealing effect between the valve seat block and the inner wall of the valve body. The inclined installation structure results in a smaller valve disc opening angle, a shorter closing stroke, and faster valve closure. The inclined arrangement of the sealing surface ensures smoother medium flow, less erosion, and more uniform sealing force, leading to a more stable sealing arm and extending the service life of the equipment. When the medium stops flowing, the valve disc closes quickly with less backflow, reducing water hammer impact and pressure fluctuations inside the valve body, thus protecting equipment components and providing some noise and vibration reduction. An annular groove is provided on the outer side of the valve disc away from auxiliary tools for embedding the rubber ring. This further improves the sealing between components, enhances the anti-leakage effect of components, and further improves the stability of the equipment. A conical block is fixedly connected to the middle of the side of the valve disc near the annular groove. When the conical block mates with the valve disc towards the valve seat block, it reduces local resistance and avoids turbulent impact. The medium will not generate violent turbulence, jetting, or backflow due to sudden changes in the flow channel, thus reducing valve disc vibration and displacement. A blade block is fixedly connected to the outside of the conical block. When the conical block enters the inside of the valve seat block, it scrapes impurities to avoid clogging the inside of the valve seat block. Furthermore, the blade block moves with the conical block to divert and stabilize the flow, suppressing cavitation and vibration.

[0005] The auxiliary device includes an auxiliary housing, with an auxiliary support rod slidably connected to the inner side of the auxiliary housing. During the process of the valve disc engaging with the valve seat block, the valve disc rotates under the reaction force of the medium flow, causing the auxiliary support rod to slide towards the top of the auxiliary housing. The auxiliary support rod compresses and contracts the second spring, thereby absorbing the rotational impact of the valve disc, reducing rotational inertia, controlling the closing speed, preventing sudden closing, and gently engaging with the sealing surface. One side of the auxiliary support rod is fixedly connected to the outer side of the valve disc, allowing the valve disc to fit against the valve seat with low impact, ensuring a tight seal without damaging the sealing surface, preventing seal cracking, deformation, or leakage. A limiting block is fixedly connected to the outer side of the auxiliary housing near the valve disc, and a second spring is provided on the outer side of the auxiliary support rod near the auxiliary housing.

[0006] The protective device includes a protective shell. The medium flows from the front end of the protective device into the valve body. The protective shell, with its funnel structure, guides the medium flow by gradually narrowing. A cylindrical shell is fixedly connected to one side of the protective shell. A protective support rod is slidably connected to the inner wall of the cylindrical shell. A protective frame is fixedly connected to the outer side of the protective support rod, away from the cylindrical shell. A baffle block is fixedly connected to the outer side of the protective frame. The medium flows along the structure of the baffle block into the inner side of the valve body, preventing direct contact between the liquid and components such as the valve disc, suppressing medium pulsation and valve disc flutter, and making the opening process smoother. A connection end is fixedly connected between the protective pipeline and the outer side of the baffle block on the valve body. When the medium inlet pressure is lower than the outlet pressure, the medium flow exhibits a reverse flow trend. The reverse pressure causes the valve disc to rotate towards the valve seat, causing the valve disc to engage with the valve seat, forming a seal. The reverse-flowing medium enters between the protective shell and the valve seat. A mating end is fixedly connected to the inner wall of the protective shell. The medium acts on the protective... On the frame, the medium pushes the protective frame into the protective shell, causing the connecting end to insert into the end face groove of the mating end, thereby achieving a certain fixing effect and maintaining the sealing effect of the components. It adapts to the valve disc and valve seat, achieving a certain double sealing effect. The mating end has an end face groove inside, and a rubber block is fixedly connected to the inner wall of the end face groove. When the connecting end enters the end face groove, it squeezes the rubber block. At the same time, the rubber block deforms and fits onto the connecting end. The rubber material squeezes the connecting end, thereby further improving the fixing effect of the components, improving the stability of the component's sealing performance, and ensuring the normal operation of the equipment. There are four mating ends, and the four mating ends are evenly distributed on the protective shell. There are four connecting ends, and the four connecting ends are plugged and unplugged with the four mating ends, thereby further increasing the contact area, improving the friction performance between the components, improving the fixing effect of the components, and improving the sealing performance between the components. The four connecting ends and the mating ends form a plugging and unplugging fit.

[0007] The anti-return device includes an anti-return frame. The valve cover is threaded onto the top of the valve body, which makes subsequent observation and maintenance of the check valve's interior inconvenient. Therefore, the anti-return frame is inserted into the valve body from the top of the valve cover. An anti-return housing is fixedly connected to the inner side of the anti-return frame. A vent is provided on the lower side of the outer side of the anti-return housing. Airflow is injected through the air valve port by an air pump. The airflow enters the airbag through the vent of the anti-return housing, causing the airbag to inflate and fill the upper groove on the inner wall of the valve body. This serves to fix the component and simultaneously seal the upper side of the inner wall of the valve body, thus preventing leakage and ensuring the normal operation of the equipment. An airbag is fixedly connected to the outer side of the anti-return housing near the vent. When disassembly is required, the gas inside the airbag is released through the air valve port, facilitating quick disassembly. An air valve port is fixedly connected to the top of the anti-return housing, and a frame groove is provided on the outer side of the anti-return frame.

[0008] The positioning device includes a slide rail, with a hinge frame slidably connected to the outer side of the slide rail. The hinge frame slides on the slide rail. When the anti-blocking frame is placed on top of the valve cover, it pushes the hinge frame to slide towards the groove side of the frame. The hinge frame drives the silicone capsule into the interior of the groove. The hinge frame adopts an inclined angle design, which forms a mechanical wedge force to limit the displacement and loosening of the anti-blocking frame. A silicone capsule is fixedly connected to one side of the hinge frame. When the silicone capsule is squeezed, it generates an elastic tension force, filling the gap between the hinge frame and the inner wall of the groove, forming uniform friction and sealing, preventing the pin from loosening or shaking, and isolating the medium or impurities from entering, thus improving the reliability and durability of the fixation. This serves to quickly install and fix the components. A strip block is fixedly connected to the outer side of the silicone capsule. The strip block is set on the outer side of the silicone capsule to increase the contact area, improve friction and anti-loosening effect, effectively prevent the components from loosening, shifting or rotating, and strengthen the anti-loosening locking effect.

[0009] The valve seat block includes an annular shell with a groove on its outer surface. A valve seat support rod is slidably connected to the inner side of the groove. When the medium wellhead pressure is lower than the outlet pressure, the medium flow tends to reverse. The reverse pressure causes the valve disc to rotate towards the valve seat block, allowing the valve disc to engage with the valve seat block and create a seal. However, during engagement, the valve disc contacts the rubber ring, and the pressure causes the rubber ring to slide the valve seat support rod towards the annular shell. A first spring is sleeved on the outer side of the valve seat support rod. The valve seat support rod compresses and contracts the first spring, thereby providing shock absorption and buffering, reducing the closing impact pressure, minimizing rigid collisions between components, reducing wear between components, and simultaneously suppressing water hammer and pressure pulsation. The system significantly reduces water hammer, vibration, and noise in the pipeline, providing a certain degree of protection for the equipment and extending its service life. A rubber ring is fixedly connected to one side of the valve seat support rod. Eight valve seat support rods are provided, evenly distributed on the annular shell. Eight first springs are provided, sleeved on the valve seat support rods. The valve seat support rods are evenly distributed on the rubber ring to ensure balanced buffering force, stabilize the buffering force, prevent local deformation, provide stable rebound, automatically reset after buffering, and disperse impact loads, thereby extending the equipment's service life, reducing rigid collisions between components, and reducing wear between components. The outer circumference of the eight valve seat support rods is distributed on one side of the rubber ring.

[0010] This invention provides an adjustable buffer-type tilting check valve. It has the following advantages: I. This adjustable buffer-type tilting check valve, when the medium wellhead pressure is lower than the outlet pressure, the medium flow shows a reverse flow trend. The reverse pressure causes the valve disc to rotate towards the valve seat block, so that the valve disc and the valve seat block are engaged to form a sealing effect. However, during the engagement process, the valve disc contacts the rubber ring, and the pressure causes the rubber ring to drive the valve seat support rod to slide towards the annular shell side. The valve seat support rod compresses and contracts the first spring, thereby playing a role in shock absorption and buffering, reducing the closing impact pressure, reducing rigid collisions between components, reducing wear between components, and at the same time, suppressing water hammer and pressure pulsation, significantly reducing pipeline water hammer, vibration, and noise, providing a certain degree of protection for the equipment, and thus extending the service life of the equipment.

[0011] 2. In this adjustable buffer type tilting check valve, during the process of the valve disc fitting into the valve seat block, the valve disc rotates and is subjected to the reaction force of the medium flow, causing the auxiliary support rod to slide towards the top of the auxiliary housing. The auxiliary support rod compresses and contracts the second spring, thereby absorbing the rotational impact of the valve disc, reducing the rotational inertia, controlling the closing speed, preventing sudden closing, and gently fitting with the sealing surface, allowing the valve disc to fit against the valve seat with low impact, ensuring a tight seal without damaging the sealing surface, and preventing seal cracking, deformation or leakage.

[0012] 3. In this adjustable buffer type tilting check valve, the medium flows from the front end of the protective device into the valve body. The medium enters the protective shell, which adopts a funnel structure to gradually guide the medium flow. The medium flows along the structure of the barrier block into the inner side of the valve body, avoiding direct liquid action on the valve disc and other components, suppressing medium pulsation and valve disc flutter, making the opening process smoother, and protecting the pipeline and valve body.

[0013] IV. This adjustable buffer-type tilting check valve uses an air pump to inject airflow from the valve port. The airflow enters the air bladder through the vent of the anti-blocking housing, causing the air bladder to expand and fill the groove on the upper side of the valve body inner wall. This serves to fix the component and simultaneously seal the upper side of the valve body inner wall, thus preventing leakage and ensuring the normal operation of the equipment. When disassembly is required, the gas inside the air bladder is released through the valve port, facilitating quick disassembly of the component.

[0014] 5. This adjustable buffer-type tilting check valve features a hinge frame with a tilted angle design. This tilt angle creates a mechanical wedging force, limiting the displacement and loosening of the check valve frame. The silicone capsule, when compressed, generates elastic tension, filling the gap between the hinge frame and the inner wall of the frame groove, forming uniform friction and sealing. This prevents the pin from loosening or shaking, while also isolating the medium or impurities from entering, improving the reliability and durability of the fixation. This allows for quick installation and fixation of components. The strip block is located on the outside of the silicone capsule, increasing the contact area, enhancing friction and anti-loosening effect, effectively preventing component loosening, displacement, or rotation, and strengthening the anti-loosening locking effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external structure of the adjustable buffer type tilting check valve of the present invention. Figure 2 This is a schematic diagram of the cross-sectional structure of the check valve of the present invention; Figure 3 This is a partial structural diagram of the check valve of the present invention; Figure 4 This is a schematic cross-sectional view of the auxiliary tool of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the valve seat block of this invention; Figure 6 This is a schematic cross-sectional view of the protective equipment of the present invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the protective equipment of the present invention; Figure 8 This is a schematic diagram of the positioning device of the present invention; Figure 9 This is a cross-sectional structural diagram of the anti-blocking device of the present invention.

[0016] In the diagram: 1. Valve body; 2. Flange; 3. Auxiliary equipment; 4. Protective equipment; 5. Anti-blocking equipment; 6. Positioning equipment; 7. Fixing frame; 8. Valve seat block; 9. Connecting frame; 10. Valve pin; 11. Valve cover; 12. Valve disc; 13. Annular groove; 14. Conical block; 15. Blade block; 31. Auxiliary housing; 32. Auxiliary support rod; 33. Second spring; 34. Limiting block; 41. Protective housing; 42. Cylindrical housing; 43. Protective support rod ; 44. Protective frame; 45. Barrier block; 46. Connecting end; 47. Butt joint end; 48. End face groove; 49. Rubber block; 51. Anti-blocking frame; 52. Air valve port; 53. Anti-blocking shell; 54. Vent; 55. Airbag; 56. Frame groove; 61. Slide rail; 62. Hinge frame; 63. Silicon capsule; 64. Strip block; 81. Annular shell; 82. Shell groove; 83. Valve seat support rod; 84. First spring; 85. Rubber ring. Detailed Implementation

[0017] First embodiment, such as Figures 1 to 4As shown, the present invention provides a technical solution: an adjustable buffer type tilting check valve, including a valve body 1, flanges 2 fixedly connected to both sides of the valve body 1, a valve cover 11 fixedly connected to the upper side of the valve body 1, a positioning device 6 fixedly connected to the top edge of the valve cover 11, an anti-blocking device 5 provided in the middle of the top of the valve cover 11, a connecting frame 9 fixedly connected to the inner wall of the valve body 1 near the valve cover 11, a valve pin 10 hinged to the outer side of the connecting frame 9, and an auxiliary device fixedly connected to the inner side of the valve pin 10. Auxiliary tool 3, a valve disc 12 is fixedly connected to one side of the outside of auxiliary tool 3, a protective tool 4 is fixedly connected to the inner wall of valve body 1 near the flange 2, a fixing frame 7 is fixedly connected to the inner wall of valve body 1 near the protective tool 4, a valve seat block 8 is fixedly connected to the inner side of the fixing frame 7, an annular groove 13 is provided on the outer side of valve disc 12 away from auxiliary tool 3, a conical block 14 is fixedly connected to the middle of the outer side of valve disc 12 near the annular groove 13, and a blade block 15 is fixedly connected to the outer side of conical block 14. When the medium flows into the valve body 1 from the inlet end near the protective device 4, the pressure pushes upwards, causing the valve pin 10 installed on the connecting frame 9 to rotate upwards and open the valve disc 12, allowing the flow path to be completely unobstructed and the medium to pass smoothly. When the inlet pressure decreases or the outlet pressure is higher than the inlet, causing a backflow tendency, the reverse pressure and the weight of the valve disc 12 will cause the valve disc 12 to quickly rotate downwards, tightly fitting against the valve seat block 8 to form a seal, completely blocking the backflow and preventing the medium from flowing back upstream, thus maintaining stable unidirectional flow. The fixing frame 7 is used to support the valve seat block 8, allowing the fixing frame 7 to be installed at an angle with the valve seat block 8, maintaining the sealing effect between the valve seat block 8 and the inner wall of the valve body 1. The inclined installation structure results in a smaller opening and closing angle of the valve disc 12, a shorter closing stroke, and faster valve closure. The inclined arrangement of the sealing surface makes the medium flow smoother, reduces scouring, and ensures uniform sealing force. The sealing arm horizontal seat is more stable, extending the service life of the equipment. When the medium stops flowing, the valve disc 12 closes quickly with less backflow, reducing water hammer impact and pressure fluctuation inside the valve body 1, which provides a certain degree of protection for the equipment components and has a certain noise reduction and vibration reduction effect. The annular groove 13 is used for the rubber ring 85 to fit, thereby further improving the sealing between components, improving the anti-leakage effect of components, and further improving the stability of the equipment. When the conical block 14 is engaged with the valve disc 12 on one side of the valve seat block 8, it reduces local resistance and avoids turbulent impact. The medium will not generate violent turbulence, jet or backflow due to sudden changes in the flow channel, reducing the vibration and displacement of the valve disc 12. At the same time, when the conical block 14 enters the inner side of the valve seat block 8, it scrapes impurities and avoids blockage inside the valve seat block 8. Secondly, the blade block 15 moves with the conical block 14 to divert and stabilize the flow, suppressing cavitation and vibration.

[0018] The second embodiment is based on the first embodiment; please refer to [link / reference]. Figures 5 to 9As shown, the protective equipment 4 includes a protective shell 41, a cylindrical shell 42 fixedly connected to one side of the outer side of the protective shell 41, a protective support rod 43 slidably connected to the inner wall of the cylindrical shell 42, a protective frame 44 fixedly connected to the outer side of the protective support rod 43 away from the cylindrical shell 42, a blocking block 45 fixedly connected to the outer side of the protective frame 44, a connecting end 46 fixedly connected to the outer side of the blocking block 45, a mating end 47 fixedly connected to the inner wall of the protective shell 41, an end face groove 48 opened inside the mating end 47, a rubber block 49 fixedly connected to the inner wall of the end face groove 48, four mating ends 47 are provided, and the four mating ends 47 are evenly distributed on the protective shell 41, and four connecting ends 46 are provided, and the four connecting ends 46 and the mating ends 47 form a plug-in fit. The medium flows from the front end of the protective device 4 into the valve body 1. The medium enters the protective housing 41, which adopts a funnel structure to gradually guide the flow of the medium. The medium flows along the structure of the barrier block 45 into the inner side of the valve body 1, preventing the liquid from directly acting on the valve disc 12 and other components, suppressing medium pulsation and valve disc 12 flutter, making the opening process smoother, and protecting the pipeline and valve body. When the medium wellhead pressure is lower than the outlet pressure, the medium flow shows a reverse flow trend. The reverse pressure causes the valve disc 12 to rotate towards the valve seat block 8, so that the valve disc 12 and the valve seat block 8 are engaged to form a sealing effect. The reversed medium enters between the protective housing 41 and the valve seat block 8. The medium acts on the protective frame 44, and the medium pushes the protective frame 44 to engage with the protective housing 41, causing the connecting end 46 to be inserted into the end face groove 48 of the docking end 47, thereby achieving a certain fixing effect, thus maintaining the sealing effect of the component, and adapting to the valve disc 12 and the valve seat to achieve a certain double sealing effect. A rubber block 49 is set inside the end face groove 48. When the connecting end 46 enters the end face groove 48, it squeezes the rubber block 49. At the same time, the rubber block 49 deforms and fits onto the connecting end 46. The rubber material squeezes the connecting end 46, thereby further improving the fixing effect of the component, improving the stability of the component's sealing performance, and ensuring the normal operation of the equipment. The four connecting ends 46 are plugged into and matched with the four mating ends 47 to further increase the contact area, improve the friction performance between components, improve the fixing effect of components, and improve the sealing performance between components.

[0019] When in use, when the medium flows in from the inlet end of the valve body 1 near the protective device 4, the pressure will push the valve pin 10 installed on the connecting frame 9. The valve pin 10 drives the valve disc 12, and the valve pin 10 rotates upward to open, so that the flow channel is completely unobstructed and the medium passes through smoothly. When the inlet pressure decreases or the outlet pressure is higher than the inlet and there is a backflow tendency, the reverse pressure and the weight of the valve disc 12 will cause the valve disc 12 to quickly rotate downward, tightly fit the valve seat block 8, form a seal, completely block the backflow, prevent the medium from flowing back upstream, and maintain stable unidirectional flow. A protective device 4 is provided on the side of the valve body 1 near the flange 2, and a positioning device 6 is provided on the top of the valve cover 11. An anti-blocking device 5 is inserted into the valve body 1 from the top of the valve cover 11. The positioning device 6 and the anti-blocking device 5 are engaged by insertion and removal to fix the components. When the medium enters from the pipe near the protective device 4, the medium flow acts on the protective device 4. The protective device 4 guides and buffers the medium, reduces the impact of the medium, and reduces the vibration of the medium on the components, thereby playing the role of noise reduction and vibration reduction. During the process of valve disc 12 engaging with valve seat block 8, valve disc 12 compresses the first spring 84 inside valve seat block 8, thereby slowing down the closing speed of valve disc 12, reducing water hammer impact and other problems, reducing component damage, and thus extending the service life of the equipment. When the valve disc 12 closes to the valve seat block 8, the backflowing medium impacts the protective frame 44 inside the protective device 4, causing the protective frame 44 to fit into the protective housing 41, thereby sealing the medium flow pipeline. It adapts to the valve disc 12 and the valve seat block 8 to form a double seal, further improving the sealing performance of the check valve. Secondly, when a problem occurs inside the check valve, the valve cover 11 needs to be opened. However, the check valve cover 11 is generally fixed by a threaded connection, which results in low opening efficiency. When the anti-blocking device 5 is fitted into the top of the valve cover 11, it acts as a seal on the top of the valve cover 11. Therefore, when the anti-blocking device 5 is inserted from the valve cover 11, air is injected from the air valve port 52. The airflow causes the air bag 55 to expand, thereby further improving the closing and blocking of medium leakage. Conversely, the air inside the air bag 55 is emptied through the air valve port 52, which facilitates the subsequent removal of components and the understanding of the internal condition of the pipeline check valve.

[0020] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An adjustable buffer-type tilting check valve, characterized in that, The valve body (1) is provided with flanges (2) fixedly connected to both sides of the valve body (1), a valve cover (11) fixedly connected to the upper side of the valve body (1), a positioning device (6) fixedly connected to the top edge of the valve cover (11), an anti-blocking device (5) provided in the middle of the top of the valve cover (11), a connecting frame (9) fixedly connected to the inner wall of the valve body (1) near the valve cover (11), a valve pin (10) hinged to the outer side of the connecting frame (9), an auxiliary device (3) fixedly connected to the inner side of the valve pin (10), a valve disc (12) fixedly connected to the outer side of the auxiliary device (3), a protective device (4) fixedly connected to the inner wall of the valve body (1) near the flange (2), a fixing frame (7) fixedly connected to the inner wall of the valve body (1) near the protective device (4), and a valve seat block (8) fixedly connected to the inner side of the fixing frame (7). The valve seat block (8) includes an annular housing (81), with a housing groove (82) on the outside of the annular housing (81). A valve seat support rod (83) is slidably connected to the inside of the housing groove (82). A first spring (84) is sleeved on the outside of the valve seat support rod (83). A rubber ring (85) is fixedly connected to one side of the valve seat support rod (83).

2. The adjustable buffer type tilting check valve according to claim 1, characterized in that: There are eight valve seat support rods (83), and the eight valve seat support rods (83) are evenly distributed on the annular housing (81). There are eight first springs (84), and the eight first springs (84) are sleeved on the valve seat support rods (83). The outer circumference of the eight valve seat support rods (83) is distributed on one side of the rubber ring (85).

3. The adjustable buffer type tilting check valve according to claim 1, characterized in that: An annular groove (13) is provided on the side of the valve disc (12) away from the auxiliary tool (3). A conical block (14) is fixedly connected to the middle of the side of the valve disc (12) near the annular groove (13). A blade block (15) is fixedly connected to the outside of the conical block (14).

4. An adjustable buffer type tilting check valve according to claim 3, characterized in that: The auxiliary device (3) includes an auxiliary housing (31), an auxiliary support rod (32) is slidably connected to the inner side of the auxiliary housing (31), one side of the auxiliary support rod (32) is fixedly connected to the outer side of the valve disc (12), a limiting block (34) is fixedly connected to the outer side of the auxiliary housing (31) near the valve disc (12), and a second spring (33) is provided on the outer side of the auxiliary support rod (32) near the auxiliary housing (31).

5. An adjustable buffer type tilting check valve according to claim 1, characterized in that: The protective equipment (4) includes a protective shell (41), a cylindrical shell (42) is fixedly connected to one side of the outer side of the protective shell (41), a protective support rod (43) is slidably connected to the inner wall of the cylindrical shell (42), a protective frame (44) is fixedly connected to the outer side of the protective support rod (43) away from the cylindrical shell (42), and a blocking block (45) is fixedly connected to the outer side of the protective frame (44).

6. An adjustable buffer type tilting check valve according to claim 5, characterized in that: The outer side of the barrier block (45) is fixedly connected to a connecting end (46), and the inner wall of the protective shell (41) is fixedly connected to a mating end (47). The mating end (47) has an end face groove (48) inside, and a rubber block (49) is fixedly connected to the inner wall of the end face groove (48).

7. An adjustable buffer type tilting check valve according to claim 6, characterized in that: The docking end (47) is provided in four parts, and the four docking ends (47) are evenly distributed on the protective shell (41). The connecting end (46) is provided in four parts, and the four connecting ends (46) and the docking ends (47) form a plug-in engagement.

8. An adjustable buffer type tilting check valve according to claim 1, characterized in that: The anti-blocking device (5) includes an anti-blocking frame (51), an anti-blocking shell (53) is fixedly connected to the inner side of the anti-blocking frame (51), an air vent (54) is opened on the lower side of the outer side of the anti-blocking shell (53), an airbag (55) is fixedly connected to the outer side of the anti-blocking shell (53) near the air vent (54), an air valve port (52) is fixedly connected to the top of the anti-blocking shell (53), and a frame groove (56) is opened on the outer side of the anti-blocking frame (51).

9. An adjustable buffer type tilting check valve according to claim 1, characterized in that: The positioning device (6) includes a slide rail (61), a hinge frame (62) is slidably connected to the outside of the slide rail (61), a silicone capsule (63) is fixedly connected to one side of the outside of the hinge frame (62), and a strip block (64) is fixedly connected to the outside of the silicone capsule (63).

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