Vent valve with throttling and shut-off function

Abstract

The present invention provides a vent valve with throttling and shut-off functions, which relates to the technical field of vent valves. The present invention includes a valve body, a valve core, a valve stem, a guide mechanism, a valve seat, and a drainage mechanism. The valve body has a cavity, and the cavity includes an upper valve cavity and a lower valve cavity that are connected; the valve core is arranged in the valve body along the axial sliding of the valve body, and the valve core is used to connect or shut off the upper valve cavity and the lower valve cavity, and there is a flow gap between the valve core and the cavity. The upper end wall of the valve body has a threaded hole, and the valve stem is threadedly inserted into the threaded hole and is rotatably connected to the top center of the valve core. An adjusting wheel is coaxially arranged at one end of the valve stem located outside the valve body. Compared with the prior art, the present invention can solve the problem of shut-off failure when the vent valve cuts off a fluid with particulate impurities.

Description

Technical Field

[0001] The invention relates to the technical field of vent valves, in particular to a vent valve with throttling and cut-off functions. Background Art

[0002] The throttling stop vent valve is a valve commonly used in industrial pipeline systems. Its main function is to regulate the flow of gas or liquid and perform venting operations when necessary. Its basic functions can be divided into three aspects: 1. Throttling function: The throttling stop vent valve can accurately control the flow of fluid, usually by adjusting the opening size of the valve. The accuracy of flow control is particularly important for many industrial processes, especially in systems where parameters such as pressure and flow rate need to be strictly controlled; 2. Cut-off function: The valve also has a cut-off function, that is, it can completely close the pipeline to prevent the fluid from continuing to pass. By rotating the valve handwheel or other operating methods, the valve can be tightly closed to cut off the flow of fluid in the pipeline; 3. Venting function: When the system needs to remove gas or liquid from the pipeline, the throttling stop vent valve can be used for venting. When venting, the valve can control the speed and pressure of fluid discharge to ensure the safety and stability of the system, especially in the scenario of gas discharge or liquid leakage, it can avoid system overpressure or leakage accidents.

[0003] After research, the applicant found that when the vent valve is used for a long time to perform shut-off control on a fluid containing particulate impurities, the vent valve often fails to shut off. Summary of the invention

[0004] In order to solve the problem of shutoff failure when the vent valve cuts off the fluid with particulate impurities, the present application provides a vent valve with throttling and shutoff functions.

[0005] The present application provides a vent valve with throttling and shut-off functions, which adopts the following technical solution:

[0006] The closure of the valve body is a function of a first opening in the closure, a second opening in the closure, and a second opening in the closure. The closure of the valve body is a function of a first opening in the closure, a second opening in the closure, and a second opening in the closure. The closure of the valve body is a function of a first opening in the closure, a second opening in the closure, and a second opening in the closure. Two inclined surfaces, the first inclined surface and the second inclined surface can be arranged in a close connection; a drainage mechanism, a curved flushing channel is provided in the valve core, the flushing channel has a first port and a second port, the first port is provided on the side wall of the valve core, the second port is provided at the second inclined surface and faces the first inclined surface, the drainage mechanism is installed between the valve core and the valve body, the drainage mechanism has a switchable first state and a second state, wherein, when the upper valve cavity and the lower valve cavity are in communication, the drainage mechanism is in the first state, and the first port is in an open state, so that part of the fluid in the upper valve cavity is pressurized and sprayed from the second port to the surface of the first inclined surface through the flushing channel; when the upper valve cavity and the lower valve cavity are cut off, the drainage mechanism is in the second state, and the second port is in a closed state, so that the fluid in the upper valve cavity no longer enters the flushing channel.

[0007] Preferably, the flushing channel includes a first channel and a second channel, the first port is located at an end of the first channel away from the second channel, and the second port is located at an end of the second channel away from the first channel; the first channel and the second channel are connected with a smooth transition, and the inner diameter of the flushing channel gradually decreases from the first channel to the second channel.

[0008] Preferably, the drainage mechanism includes a resistance component and a rotating component, the resistance component is installed on the inner wall of the cavity, and the rotating component is installed on the valve core and is located at the first port; when the drainage mechanism is in a first state, the resistance component and the rotating component are in relative positions, and the resistance component automatically pushes the rotating component to partially open the first port; when the drainage mechanism is in a second state, the resistance component and the rotating component are staggered in the axial direction of the cavity, so that the rotating component closes the first port in a natural state.

[0009] Preferably, the resistance assembly includes a spring and a pushing portion, a accommodating cavity is laterally provided on the side wall of the cavity, the pushing portion is slidably provided in the accommodating cavity, the spring is provided between the inner wall of the accommodating cavity and the pushing portion, and the spring enables the pushing portion to always have a tendency to move from the accommodating cavity into the cavity so as to apply a thrust to the rotating assembly; the pushing portion and the inner side wall of the accommodating cavity are in sliding sealing cooperation.

[0010] Preferably, the rotating assembly includes a rotating plate, a rotating rod and a torsion spring, the rotating rod is arranged in the valve core and is located in the middle position of the first port, the torsion spring is sleeved on the rotating rod, and the rotating plate is horizontally penetrated by a rotating hole for the rotating rod to pass through, one end of the torsion spring is connected to the rotating rod, and the other end is connected to the inner wall of the rotating hole, and the shape of the rotating plate is adapted to the shape of the first port; a resistance surface is provided at the upper end of the first port, the rotating plate includes an upper plate body and a lower plate body, the torsion spring makes the upper plate body always have a tendency to rotate toward the side close to the resistance surface, and when the upper plate body and the resistance surface are in a tightly fitted state, the first port is in a closed state under the action of the rotating plate; the pushing part is used to resist the lower plate body so that the lower plate body rotates in a direction close to the first port, and the elastic force of the spring is greater than the torsion force of the torsion spring.

[0011] Preferably, a rubber sealing ring is provided on the outer periphery of the rotating plate.

[0012] Preferably, the end of the pushing portion away from the spring has a first sliding slope, and when the valve core moves vertically downward along the axial direction of the cavity, the second slope can slide and conflict with the first sliding slope, so that the pushing portion avoids the valve core; when the pushing portion moves laterally to the position of maximum displacement distance and conflicts with the lower plate body under the action of the spring, the first sliding slope fits against the outer wall of the lower plate body.

[0013] Preferably, the end of the pushing portion away from the spring also has a second sliding slope, the second sliding slope is located below the first sliding slope, and an outlet slope is provided at the lower end of the first port; when the valve core moves vertically upward along the axial direction of the cavity, the second sliding slope can slide against the outlet slope to make the pushing portion move horizontally out of the first port.

[0014] Preferably, the guide mechanism includes a guide rod and a guide cylinder. The guide rod is provided on one of the top wall of the valve core and the inner top wall of the cavity, and the guide cylinder is provided on the other. The guide rod is slidably inserted in the guide cylinder. The cross-sectional shape of the guide cylinder and the guide rod are both rectangular, and the length directions of the guide rod and the guide cylinder are consistent with the axial direction of the cavity.

[0015] Preferably, the drainage mechanism is provided in multiple groups on the periphery of the valve core; and / or, the guide mechanism is provided in multiple groups in parallel.

[0016] The present invention has the following advantages and beneficial effects:

[0017] By setting a curved flushing channel in the valve core of the throttling stop vent valve and combining the switchable function of the drainage mechanism, the problem of shutoff failure caused by the accumulation of particulate impurities between the valve core and the valve seat in the prior art is solved, which has a significant technical effect. Specifically, the valve core can switch the drainage mechanism, and when the second inclined surface of the valve core and the first inclined surface of the valve seat are not completely in contact, the flushing channel can be activated through the drainage mechanism, and the fluid in the upper valve cavity can be pressurized through the flushing channel and sprayed from the second port of the valve core to the surface of the valve seat, forming a strong flushing water flow, thereby effectively removing the particulate impurities remaining on the valve seat, restoring the sealing of the valve seat and the valve core, and ensuring that the valve can maintain stable sealing performance during fluid circulation and shutoff. At the same time, after the second inclined surface of the valve core and the first inclined surface of the valve seat are completely in contact, the drainage mechanism will automatically close the flushing channel so that the fluid in the upper valve cavity no longer enters the flushing channel.

[0018] This design not only solves the problem of valve shutoff failure caused by particulate impurities, but also significantly improves the sealing and service life of the valve. When the valve core and the valve seat are fully fitted, the drainage mechanism automatically switches to a closed state to prevent the fluid from entering the flushing channel, thereby ensuring that the normal shutoff function of the valve is not affected and maintaining the accuracy and stability of fluid control. In addition, the automatic cleaning function reduces the need for manual maintenance, reduces the production downtime and cost caused by frequent cleaning and maintenance, and greatly improves the reliability and work efficiency of the equipment. This innovative design enables the valve to reliably perform throttling, shutoff and venting functions under harsh working conditions, especially when handling fluids containing solid particles or impurities, avoiding the risk of reduced sealing performance and frequent failures of traditional valves in long-term use. It is suitable for a wider range of industrial pipeline systems, especially for occasions requiring high-precision flow control and safe venting.

[0019] In addition, since the drainage mechanism can automatically remove particulate impurities, the service life of the valve is effectively extended, reducing valve damage caused by particle accumulation, thereby reducing the frequency of equipment replacement and long-term maintenance costs, and further improving the overall efficiency of industrial production. In short, the throttling stop vent valve of the present invention successfully solves the problem of particulate impurities affecting the valve stop function through its innovative drainage mechanism and flushing channel design, which not only improves the performance of the valve, but also significantly reduces maintenance costs, and increases the application range of the valve in complex fluid control, and has a wide range of industrial application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the structure of some embodiments of the present application Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the structure of some embodiments of the present application Figure 2 ;

[0023] Figure 3 yes Figure 1 A magnified view of part A in FIG.

[0024] Figure 4 yes Figure 2 Enlarged view of part B in .

[0025] The markings in the figure are:

[0026] 1. Valve body; 11. Cavity; 111. Upper valve cavity; 112. Lower valve cavity; 113. Accommodating cavity; 2. Valve core; 21. Second inclined surface; 22. Flushing channel; 221. First port; 2211. Resistance surface; 2212. Lead-out inclined surface; 222. Second port; 223. First channel; 224. Second channel; 3. Valve stem; 31. Adjusting wheel; 4. Guide mechanism; 41. Guide rod; 42. Guide cylinder; 5. Valve seat; 51. First inclined surface; 6. Drainage mechanism; 7. Resistance assembly; 71. Spring; 72. Pushing part; 721. First sliding inclined surface; 722. Second sliding inclined surface; 8. Rotating assembly; 81. Rotating plate; 811. Upper plate body; 812. Lower plate body; 82. Rotating rod; 83. Torsion spring; 9. Rubber sealing ring. DETAILED DESCRIPTION

[0027] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0028] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0029] In the related art, the throttling, shut-off and venting valve is a valve widely used in industrial pipeline systems, and its main functions are to regulate fluid flow, shut off fluid and perform venting operations. The design and functions of the valve are divided into three core parts: throttling function, shut-off function and venting function. The throttling function enables the valve to accurately regulate the flow of the fluid, usually by controlling the size of the valve opening to achieve flow regulation. This function is crucial to many industrial processes, especially in systems that require precise control of fluid pressure, flow rate and other parameters, such as pipeline systems in the petroleum, chemical, energy and other industries. The shut-off function enables the valve to completely close the pipeline, cut off the flow of the fluid and prevent the continued flow of the fluid. By rotating the valve handwheel or using other methods, the valve can be effectively closed to ensure that the fluid no longer passes through the pipeline to avoid leakage or other safety hazards. The venting function is usually used in scenarios where gas or liquid needs to be discharged, especially when the system needs to release pressure or clean up the fluid. The venting operation needs to be carried out under the premise of strictly controlling the fluid discharge rate and pressure to ensure the stability and safety of the entire system and prevent overpressure or leakage of the system caused by rapid discharge of gas or liquid.

[0030] However, during long-term use, especially when it comes to fluids with particulate impurities, the throttling stop and vent valve often has the problem of shutoff failure. Although the throttling stop and vent valve in the prior art can meet the basic flow regulation, shutoff and venting requirements in most application scenarios, under certain circumstances, especially when transporting fluids containing particulate impurities, the valve has more significant defects. The applicant's research found that particulate impurities may remain on the contact surface between the valve core and the valve seat during fluid transportation. The accumulation of these impurities will lead to a decrease in the sealing between the valve core and the valve seat, making it impossible to achieve complete fit, thereby creating a gap when the valve is closed. These gaps directly cause the valve to be unable to effectively cut off the flow of fluid, thereby causing the valve's shutoff function to fail.

[0031] The origin of this technical problem can be traced back to the fact that the traditional throttling stop vent valve was not fully considered in its design, as the impact of particulate impurities on the valve sealing performance was not fully considered. Although the valve's shutoff function is designed to be achieved through the cooperation of a precise valve core and a valve seat, in actual applications, particulate impurities in the fluid tend to gradually deposit during use, causing the valve's sealing performance to continue to decline. This problem has a particularly serious impact on the application of throttling stop vent valves in liquid and gas discharge systems, especially when dealing with fluids containing solid particles or other impurities. The valve often cannot reliably cut off the flow of the fluid, resulting in a control failure of the pipeline system, and may even cause safety accidents such as overpressure and leakage.

[0032] Although there are some improvement measures in the existing solutions in valve sealing, such as strengthening the surface hardening of the valve seat and valve core, and using wear-resistant materials, these methods do not completely solve the long-term impact of particulate impurities on valve sealing performance. Over time, particulate impurities may still enter the tiny gap between the valve core and the valve seat, causing the sealing effect to gradually fail. In addition, most current valve designs do not take special protective measures against the high frequency of particulate impurities, and rely on external cleaning or regular maintenance to solve this problem, which not only increases maintenance costs in industrial production, but also affects production efficiency.

[0033] Therefore, the existing technology fails to effectively solve the problem of the throttling stop vent valve failing to function during long-term use, especially when a fluid with a lot of particulate impurities is flowing. Based on this problem, there is an urgent need for a technical solution that can improve the valve sealing performance and reduce the impact of particulate impurities on the valve stop function.

[0034] Based on this, the present application provides a vent valve with throttling and shut-off functions to solve the problem of shut-off failure when the vent valve shuts off a fluid with particulate impurities.

[0035] Please refer to Figure 1~Figure 4 The vent valve comprises a valve body 1, a valve core 2, a valve stem 3, a guide mechanism 4, a valve seat 5 and a drainage mechanism 6. The valve body 1 has a cavity 11, and the cavity 11 comprises an upper valve cavity 111 and a lower valve cavity 112 which are connected to each other; the valve core 2 is arranged in the valve body 1 along the axial direction of the valve body 1 to slide, and the valve core 2 is used to connect or cut off the upper valve cavity 111 and the lower valve cavity 112, and there is a flow gap between the valve core 2 and the cavity 11. The upper end wall of the valve body 1 has a threaded hole, and the valve stem 3 is threadedly arranged in the threaded hole and is rotatably connected to the top center of the valve core 2. The end of the valve stem 3 located outside the valve body 1 is coaxially provided with an adjusting wheel 31.

[0036] At the same time, the guide mechanism 4 is installed between the upper top wall of the valve core 2 and the inner top wall of the cavity 11, which is used to drive the valve core 2 to maintain axial movement of the valve body 1, and at the same time limit the rotation of the valve core 2 during the movement; the valve seat 5 is arranged in the valve body 1 and is located at the connecting junction of the upper valve cavity 111 and the lower valve cavity 112. The valve seat 5 has a first inclined surface 51 inclined upward, and the lower end surface of the valve core 2 has a second inclined surface 21 inclined downward. The first inclined surface 51 and the second inclined surface 21 can be arranged in a close fit.

[0037] Furthermore, a curved flushing channel 22 is provided in the valve core 2, and the flushing channel 22 has a first port 221 and a second port 222. The first port 221 is provided on the side wall of the valve core 2, and the second port 222 is provided at the second inclined surface 21 and faces the first inclined surface 51. The drainage mechanism 6 is installed between the valve core 2 and the valve body 1, and the drainage mechanism 6 has a switchable first state and a second state, wherein, when the upper valve cavity 111 and the lower valve cavity 112 are in communication, the drainage mechanism 6 is in the first state, and the first port 221 is in an open state, so that part of the fluid in the upper valve cavity 111 is pressurized and sprayed from the second port 222 to the surface of the first inclined surface 51 through the flushing channel 22; when the upper valve cavity 111 and the lower valve cavity 112 are cut off, the drainage mechanism 6 is in the second state, and the second port 222 is in a closed state, so that the fluid in the upper valve cavity 111 no longer enters the flushing channel 22.

[0038] On this basis, by setting a curved flushing channel 22 in the valve core 2 of the throttling stop vent valve, and combining the switchable function of the drainage mechanism 6, the problem of shutoff failure caused by the accumulation of particulate impurities between the valve core 2 and the valve seat 5 in the prior art is solved, which has a significant technical effect. Specifically, the valve core 2 can start the flushing channel 22 through the drainage mechanism 6 when the second inclined surface 21 of the valve core 2 is not completely in contact with the first inclined surface 51 of the valve seat 5, and the fluid in the upper valve cavity 111 is pressurized through the flushing channel 22 and sprayed from the second port 222 of the valve core 2 to the surface of the valve seat 5, forming a strong flushing water flow, thereby effectively removing the particulate impurities remaining on the valve seat 5, restoring the sealing performance of the valve seat 5 and the valve core 2, and ensuring that the valve can maintain stable sealing performance during the fluid circulation and shutoff process. At the same time, after the second inclined surface 21 of the valve core 2 is completely in contact with the first inclined surface 51 of the valve seat 5, the drainage mechanism 6 will automatically close the flushing channel 22, so that the fluid in the upper valve cavity 111 no longer enters the flushing channel 22.

[0039] This design not only solves the problem of valve shutoff failure caused by particulate impurities, but also significantly improves the sealing and service life of the valve. When the valve core 2 is fully fitted with the valve seat 5, the drainage mechanism 6 automatically switches to a closed state to prevent the fluid from entering the flushing channel 22, thereby ensuring that the normal shutoff function of the valve is not affected and maintaining the accuracy and stability of fluid control. In addition, the automatic cleaning function reduces the need for manual maintenance, reduces the production downtime and cost caused by frequent cleaning and maintenance, and greatly improves the reliability and work efficiency of the equipment. This innovative design enables the valve to reliably perform throttling, shutoff and venting functions under harsh working conditions, especially when handling fluids containing solid particles or impurities, avoiding the risk of reduced sealing performance and frequent failures of traditional valves in long-term use. It is suitable for a wider range of industrial pipeline systems, especially for occasions requiring high-precision flow control and safe venting.

[0040] In addition, since the drainage mechanism 6 can automatically remove particulate impurities, the service life of the valve is effectively extended, reducing valve damage caused by particle accumulation, thereby reducing the frequency of equipment replacement and long-term maintenance costs, and further improving the overall efficiency of industrial production. In short, the throttling stop vent valve of the present invention successfully solves the problem of particulate impurities affecting the valve stop function through its innovative drainage mechanism 6 and flushing channel 22 design, which not only improves the performance of the valve, but also significantly reduces maintenance costs, and increases the application range of the valve in complex fluid control, and has a wide range of industrial application prospects.

[0041] In some embodiments, Figure 1~Figure 4 As shown, the flushing channel 22 includes a first channel 223 and a second channel 224, the first port 221 is located at one end of the first channel 223 away from the second channel 224, and the second port 222 is located at one end of the second channel 224 away from the first channel 223. Exemplarily, the first channel 223 and the second channel 224 are connected by a smooth transition, and the inner diameter of the flushing channel 22 gradually decreases from the first channel 223 to the second channel 224. In this way, the smooth transition between the first channel 223 and the second channel 224 can ensure that the fluid will not produce obvious flow resistance or turbulence when flowing in the flushing channel 22, ensure the smooth flow of the flushing fluid, and reduce the situation that the flushing effect may be unsatisfactory due to uneven flow. At the same time, as the inner diameter of the channel gradually decreases, the fluid will experience a gradual acceleration process during the flow process, resulting in the fluid pressure gradually increasing at the second channel 224, thereby forming a strong flushing water flow. The water flow can more effectively impact the surface of the valve seat 5 and remove the particle impurities attached to the surface. Through the gradually increasing pressure and strong flushing fluid, the present invention can ensure the cleanliness of the surface of the valve seat 5, thereby restoring and maintaining the sealing performance between the valve core 2 and the valve seat 5, and avoiding the problem of cut-off failure caused by particle blockage or deposition.

[0042] In some embodiments, in combination Figure 1~Figure 4 The drainage mechanism 6 includes a resistance component 7 and a rotating component 8, the resistance component 7 is installed on the inner wall of the cavity 11, and the rotating component 8 is installed on the valve core 2 and is located at the first port 221; wherein, when the drainage mechanism 6 is in the first state, the resistance component 7 and the rotating component 8 are in relative positions, and the resistance component 7 automatically pushes the rotating component 8 to partially open the first port 221; when the drainage mechanism 6 is in the second state, the resistance component 7 and the rotating component 8 are staggered in the axial direction of the cavity 11, so that the rotating component 8 closes the first port 221 in a natural state.

[0043] Exemplarily, the resistance component 7 includes a spring 71 and a pushing portion 72. A accommodating cavity 113 is laterally provided on the side wall of the cavity 11. The pushing portion 72 is slidably provided in the accommodating cavity 113. The spring 71 is provided between the inner wall of the accommodating cavity 113 and the pushing portion 72. The spring 71 enables the pushing portion 72 to always have a tendency to move from the accommodating cavity 113 into the cavity 11 to apply a thrust to the rotating component 8. Furthermore, the pushing portion 72 and the inner side wall of the accommodating cavity 113 are in a sliding sealing fit.

[0044] Exemplarily, the rotating assembly 8 includes a rotating plate 81, a rotating rod 82 and a torsion spring 83. The rotating rod 82 is arranged in the valve core 2 and is located in the middle of the first port 221. The torsion spring 83 is sleeved on the rotating rod 82. A rotating hole for the rotating rod 82 to pass through is transversely penetrated on the rotating plate 81. One end of the torsion spring 83 is connected to the rotating rod 82, and the other end is connected to the inner wall of the rotating hole. The shape of the rotating plate 81 is adapted to the shape of the first port 221. At the same time, a contact surface 2211 is provided at the upper end of the first port 221. The rotating plate 81 includes an upper plate body 811 and a lower plate body 812. The torsion spring 83 makes the upper plate body 811 always have a tendency to rotate toward the side close to the contact surface 2211, and when the upper plate body 811 and the contact surface 2211 are in a tightly fitted state, the first port 221 is in a closed state under the action of the rotating plate 81; further, the pushing portion 72 is used to contact the lower plate body 812 so that the lower plate body 812 rotates toward the direction close to the first port 221, and the elastic force of the spring 71 is greater than the torsion of the torsion spring 83.

[0045] On this basis, the abutment assembly 7 is composed of a pusher 72 and a spring 71. The pusher 72 is combined with the inner wall of the cavity 11 through a sliding seal, and the spring 71 always applies a thrust to keep the pusher 72 moving into the cavity 11. When the valve is in the first state, that is, when fluid cleaning is required, the pusher 72 pushes the rotating assembly 8 through the action of the spring 71, so that the rotating assembly 8 is in a position relative to the first port 221 in the valve core 2, thereby partially opening the first port 221, allowing the fluid in the upper valve cavity 111 to enter the flushing channel 22.

[0046] At the same time, the rotating assembly 8 is composed of a rotating plate 81, a rotating rod 82 and a torsion spring 83. Through precise matching, the rotating plate 81 can automatically rotate and control the opening and closing of the first port 221. The shape of the rotating plate 81 is adapted to the first port 221, and the torsion spring 83 provides a continuous return force to ensure that the rotating plate 81 is tightly fitted with the first port 221 in the second state, completely closing the first port 221 to prevent the fluid from entering the flushing channel 22. At the same time, the cooperation between the pusher 72 and the rotating assembly 8 ensures that the fluid can smoothly flow into the flushing channel 22 when the drainage mechanism 6 is in the first state. As the flow area gradually decreases, the fluid pressure increases, thereby forming a flushing water flow to impact the surface of the valve seat 5 and remove the particle impurities attached to the valve seat 5.

[0047] Specifically, when the drainage mechanism 6 is in the first state and the valve does not need to be in the cut-off state, the pusher 72 causes the lower plate 812 of the rotating assembly 8 to rotate inwardly of the valve core 2 through the elastic force of the spring 71, so that the rotating plate 81 and the first port 221 are open, and the fluid in the upper valve cavity 111 can enter the flushing channel 22 through the first port 221, and then directly spray onto the first inclined surface 51 from the second port 222, so as to clean the particle impurities remaining on the surface of the first inclined surface 51. Similarly, when the drainage mechanism 6 is in the second state and the valve is in the cut-off state, the abutment assembly 7 is staggered with the rotating assembly 8 in the axial direction of the cavity 11, so the pusher 72 no longer applies a thrust to the rotating plate 81, and under the torsion of the torsion spring 83, the rotating plate 81 will automatically reset to the position of closing the first port 221, thereby preventing the fluid in the upper valve cavity 111 from entering the flushing channel 22. That is, while cutting off the flow between the upper valve chamber 111 and the lower valve chamber 112 , it is also possible to prevent the fluid from entering the flushing channel 22 .

[0048] It is worth noting that the thrust of the spring 71 is greater than the torsion of the torsion spring 83, ensuring that the push part 72 can always effectively push the rotating assembly 8, thereby accurately controlling the opening and closing of the flushing channel 22. The working principle of the entire drainage mechanism 6 relies on the precise coordination of the resistance assembly 7 and the rotating assembly 8. The thrust of the spring 71 of the push part 72 interacts with the return force of the torsion spring 83 of the rotating plate 81, so that the valve can automatically start the flushing program when cleaning is required, and quickly switch to the cut-off state when cleaning is not required. This design effectively avoids the accumulation of particulate impurities and clogging of the sealing surface between the valve core 2 and the valve seat 5, avoids cut-off failure caused by particulate impurities, improves the sealing and stability of the valve, and extends the service life of the valve. In general, the drainage mechanism 6 of the present invention ensures the precise control of the valve under various working conditions through fine structural design and the interaction between components, and significantly improves the adaptability and reliability of the valve in fluids containing impurities through the automatic cleaning function.

[0049] In some embodiments, Figure 3~Figure 4 As shown, the outer periphery of the rotating plate 81 is sleeved with a rubber sealing ring 9. The rubber sealing ring 9 can effectively fill the small gap between the rotating plate 81 and the valve body 1 to prevent fluid leakage and ensure complete sealing of the first port 221 when the vent valve is in the cut-off state.

[0050] In some embodiments, reference Figure 3~Figure 4 The end of the push portion 72 away from the spring 71 has a first sliding slope 721. When the valve core 2 moves vertically downward along the axial direction of the cavity 11, the second slope 21 can slide and conflict with the first sliding slope 721, so that the push portion 72 avoids the valve core 2; illustratively, when the push portion 72 moves laterally to the position of maximum displacement distance and conflicts with the lower plate body 812 under the action of the spring 71, the first sliding slope 721 fits against the outer wall of the lower plate body 812.

[0051] At the same time, the end of the push part 72 away from the spring 71 also has a second sliding slope 722, the second sliding slope 722 is located below the first sliding slope 721, and the lower end of the first port 221 is provided with a lead-out slope 2212; further, when the push part 72 moves horizontally to the maximum displacement distance and contacts the lower plate 812 under the action of the spring 71, the second sliding slope 722 and the lead-out slope 2212 are opposite in the vertical direction. Exemplarily, when the valve core 2 moves vertically upward along the axial direction of the cavity 11, the second sliding slope 722 can slide and contact the lead-out slope 2212, so that the push part 72 moves out of the first port 221. Exemplarily, the rubber sealing ring 9 has a good ductility. When the rotating plate 81 is in a position to close the first port 221, it can cover the gap between the first port 221 and the second sliding slope 722 under the action of its own elastic extension force, thereby making the first port 221 better sealed.

[0052] With such a configuration, when the valve core 2 moves vertically downward along the axial direction of the cavity 11, the first sliding inclined surface 721 interacts with the second inclined surface 21. When the first sliding inclined surface 721 of the push portion 72 slides against the second inclined surface 21 of the valve core 2, the push portion 72 will gradually shrink into the accommodating cavity 113, and the spring 71 will gradually compress. The push portion 72 avoids the valve core 2 through the sliding of the inclined surface, thereby ensuring that the fluid control function of the valve can be carried out smoothly. Specifically, when the valve core 2 moves downward, the sliding conflict between the push portion 72 and the valve core 2 prompts other components of the valve to adjust their relative positions, thereby avoiding the situation where the push portion 72 is stuck or cannot move smoothly.

[0053] As the valve core 2 continues to move until the lower plate 812 is facing the push portion 72, the push portion 72 moves laterally to the maximum displacement under the elastic force of the spring 71, so that the push portion 72 can effectively transmit pressure to the lower plate 812, thereby pushing the lower plate 812 to rotate into the first port 221, thereby opening the upper plate 811, so that the upper cavity 11 is connected to the flushing channel 22. At the same time, the first sliding slope 721 of the push portion 72 fits the outer wall of the lower plate 812 to form a more stable contact, so that the rotating plate 81 can remain in the current state. In this process, the lateral movement of the push portion 72 can not only adjust the position of each component of the valve, but also form precise operation control through the interference with the lower plate 812. Exemplarily, when the first sliding slope 721 fits against the outer wall of the lower plate 812, the end of the upper plate 811 away from the lower plate 812 also abuts against the inner wall of the cavity 11, so that the rotating plate 81 can remain in the current state, so that the first port 221 always remains open.

[0054] In general, through the combined action of the first sliding inclined surface 721, the second sliding inclined surface 722 of the pusher 72 and the spring 71, and the precise cooperation with the lead-out inclined surface 2212, the entire vent valve can achieve precise control of the fluid under different working conditions, especially the switching between throttling, cut-off and cleaning operations. These designs ensure the smoothness and reliability of the valve operation, so that when processing fluids containing particulate impurities, it can not only avoid cut-off failure, but also effectively clean the surface of the valve seat 5, prolong the service life, and improve the adaptability of the valve in complex working environments.

[0055] In some embodiments, Figure 1~Figure 2As shown, the guide mechanism 4 includes a guide rod 41 and a guide cylinder 42. In the top wall of the valve core 2 and the inner top wall of the cavity 11, one is provided with the guide rod 41, and the other is provided with the guide cylinder 42. The guide rod 41 is slidably inserted in the guide cylinder 42; illustratively, the cross-sectional shapes of the guide cylinder 42 and the guide rod 41 are both rectangular, and the length directions of the guide rod 41 and the guide cylinder 42 are consistent with the axial direction of the cavity 11. In this way, the arrangement of the guide rod 41 and the guide cylinder 42 can allow the valve core 2 to move stably in the axial direction of the cavity 11, and because the cross-sectional shapes of the guide cylinder 42 and the guide rod 41 are both rectangular, the guide cylinder 42 and the guide rod 41 will not rotate relative to each other, and thus the valve core 2 will not rotate relative to each other, thereby ensuring the movement stability of the valve core 2, and also avoiding the misalignment of the rotating plate 81 and the pushing portion 72 during the movement of the valve core 2.

[0056] In some embodiments, reference Figure 1~Figure 2 , multiple groups of drainage mechanisms 6 are provided on the outer periphery of the valve core 2; and / or multiple groups of guide mechanisms 4 are provided in parallel. In this way, multiple groups of guide mechanisms 4 can further improve the movement stability of the valve core 2, and multiple groups of drainage mechanisms 6 can further fully flush the particle impurities remaining on the surface of the first inclined surface 51.

[0057] Exemplarily, the cross-sectional shape of the cavity 11 can be rectangular or circular. When the cross-sectional shape of the cavity 11 is rectangular, the cross-sectional shape of the corresponding valve core 2 is rectangular, and two valve seats 5 are symmetrically arranged at the center line of the cavity 11. When the cross-sectional shape of the cavity 11 is circular, the cross-sectional shape of the corresponding valve core 2 is circular, and the first inclined surface 51 on the valve seat 5 is a cone, and the second inclined surface 21 on the valve core 2 is also a cone. Further, the corresponding rotating plate 81 will also be adaptively changed according to the shape of the valve core 2. For example, when the valve core 2 is rectangular, the outer plate surface of the rotating plate 81 is also rectangular, and when the valve core 2 is circular, the curvature of the outer plate surface of the rotating plate 81 is an arc.

[0058] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vent valve with throttling and shut-off functions, characterized in that: include: A valve body (1) having a cavity (11), wherein the cavity (11) comprises an upper valve cavity (111) and a lower valve cavity (112) which are connected to each other; A valve core (2) is slidably disposed in the valve body (1) along the axial direction of the valve body (1) and is used to connect or cut off the upper valve cavity (111) and the lower valve cavity (112), and a flow gap is provided between the valve core (2) and the cavity (11); A valve stem (3), wherein the upper end wall of the valve body (1) has a threaded hole, the valve stem (3) is threadedly inserted into the threaded hole and is rotatably connected to the top center of the valve core (2), and an adjusting wheel (31) is coaxially provided at one end of the valve stem (3) located outside the valve body (1); A guide mechanism (4) is installed between the upper top wall of the valve core (2) and the inner top wall of the cavity (11), and is used to drive the valve core (2) to maintain axial movement of the valve body (1) and to limit the rotation of the valve core (2) during movement; A valve seat (5) is arranged in the valve body (1) and is located at the communicating interface between the upper valve cavity (111) and the lower valve cavity (112); the valve seat (5) has a first inclined surface (51) inclined upward, and the lower end surface of the valve core (2) has a second inclined surface (21) inclined downward, and the first inclined surface (51) and the second inclined surface (21) can be arranged in close contact with each other; A flow guiding mechanism (6), wherein a curved flushing channel (22) is provided in the valve core (2), wherein the flushing channel (22) has a first port (221) and a second port (222), wherein the first port (221) is provided on a side wall of the valve core (2), and the second port (222) is provided at a second inclined surface (21) and faces the first inclined surface (51), wherein the flow guiding mechanism (6) is installed between the valve core (2) and the valve body (1), and wherein the flow guiding mechanism (6) has a switchable first state and a second state, wherein: When the upper valve chamber (111) and the lower valve chamber (112) are in communication, the drainage mechanism (6) is in a first state, and the first port (221) is in an open state, so that part of the fluid in the upper valve chamber (111) is pressurized and sprayed from the second port (222) to the surface of the first inclined surface (51) through the flushing channel (22); When the upper valve chamber (111) and the lower valve chamber (112) are in a cut-off state, the drainage mechanism (6) is in a second state, and the second port (222) is in a closed state, so that the fluid in the upper valve chamber (111) no longer enters the flushing channel (22); The drainage mechanism (6) comprises a resistance component (7) and a rotating component (8), wherein the resistance component (7) is mounted on the inner wall of the cavity (11), and the rotating component (8) is mounted on the valve core (2) and is located at the first port (221); when the drainage mechanism (6) is in a first state, the resistance component (7) and the rotating component (8) are in relative positions, and the resistance component (7) automatically pushes the rotating component (8) to partially open the first port (221); when the drainage mechanism (6) is in a second state, the resistance component (7) and the rotating component (8) are staggered in the axial direction of the cavity (11), so that the rotating component (8) closes the first port (221) in a natural state; The abutment assembly (7) comprises a spring (71) and a pushing portion (72); a receiving cavity (113) is transversely provided on the side wall of the cavity (11); the pushing portion (72) is slidably arranged in the receiving cavity (113); the spring (71) is arranged between the inner wall of the receiving cavity (113) and the pushing portion (72); and the spring (71) enables the pushing portion (72) to always have a tendency to move from the receiving cavity (113) into the cavity (11) so as to apply a thrust to the rotating assembly (8); the pushing portion (72) and the inner wall of the receiving cavity (113) are in sliding sealing cooperation; The rotating assembly (8) comprises a rotating plate (81), a rotating rod (82) and a torsion spring (83); the rotating rod (82) is arranged in the valve core (2) and is located in the middle of the first port (221); the torsion spring (83) is sleeved on the rotating rod (82); a rotating hole for the rotating rod (82) to pass through is transversely penetrated on the rotating plate (81); one end of the torsion spring (83) is connected to the rotating rod (82) and the other end is connected to the inner wall of the rotating hole; the shape of the rotating plate (81) is adapted to the shape of the first port (221); a contact surface (2211) is provided at the upper end of the first port (221) The rotating plate (81) includes an upper plate body (811) and a lower plate body (812); the torsion spring (83) enables the upper plate body (811) to always have a tendency to rotate toward the side close to the contact surface (2211); and when the upper plate body (811) and the contact surface (2211) are in a tightly fitted state, the first port (221) is in a closed state under the action of the rotating plate (81); the pushing portion (72) is used to contact the lower plate body (812) so that the lower plate body (812) rotates toward the direction close to the first port (221), and the elastic force of the spring (71) is greater than the torsion force of the torsion spring (83).

2. The vent valve with throttling and shutoff functions according to claim 1, characterized in that: The flushing channel (22) comprises a first channel (223) and a second channel (224), the first port (221) is located at an end of the first channel (223) away from the second channel (224), and the second port (222) is located at an end of the second channel (224) away from the first channel (223); The first channel (223) and the second channel (224) are connected in a smooth transition, and the inner diameter of the flushing channel (22) gradually decreases from the first channel (223) to the second channel (224).

3. The vent valve with throttling and shutoff functions according to claim 1, characterized in that: The outer periphery of the rotating plate (81) is sleeved with a rubber sealing ring (9).

4. The vent valve with throttling and shutoff functions according to claim 1, characterized in that: The end of the pushing portion (72) away from the spring (71) has a first sliding inclined surface (721), and when the valve core (2) moves vertically downward along the axial direction of the cavity (11), the second inclined surface (21) can slide against the first sliding inclined surface (721), so that the pushing portion (72) avoids the valve core (2); When the pushing portion (72) moves laterally to a position of maximum displacement distance and contacts the lower plate body (812) under the action of the spring (71), the first sliding inclined surface (721) fits against the outer wall of the lower plate body (812).

5. The vent valve with throttling and shutoff functions according to claim 4, characterized in that: The end of the pushing portion (72) away from the spring (71) also has a second sliding inclined surface (722), and the second sliding inclined surface (722) is located below the first sliding inclined surface (721), and the lower end of the first port (221) is provided with a lead-out inclined surface (2212); When the valve core (2) moves vertically upward along the axial direction of the cavity (11), the second sliding inclined surface (722) can slide against the lead-out inclined surface (2212) to enable the pushing portion (72) to move horizontally out of the first port (221).

6. The vent valve with throttling and shutoff functions according to claim 1, characterized in that: The guide mechanism (4) comprises a guide rod (41) and a guide cylinder (42). The guide rod (41) is disposed on one of the top wall of the valve core (2) and the inner top wall of the cavity (11), and the guide cylinder (42) is disposed on the other of the top wall. The guide rod (41) is slidably inserted into the guide cylinder (42). The cross-sectional shapes of the guide cylinder (42) and the guide rod (41) are both rectangular, and the length directions of the guide rod (41) and the guide cylinder (42) are consistent with the axial direction of the cavity (11).

7. The vent valve with throttling and shutoff functions according to any one of claims 1 to 6, characterized in that: The drainage mechanism (6) is provided in multiple groups on the outer periphery of the valve core (2); And / or, the guide mechanisms (4) are arranged in multiple groups in parallel.

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