Pulse feeding valve

Abstract

A pulse feeding valve comprises a valve body, a valve element assembly and an air cylinder assembly. The valve body is of a sealing structure with openings in the upper end and the lower end, and a valve element assembly is arranged in the opening in the lower end of the valve body and is a telescopic component. An air passage is arranged at the lower end opening of the valve body; the air channel is connected to the bottom of the valve element assembly. The cylinder assembly is arranged on the outer side wall of the valve body; when the valve element assembly moves upwards, the opening in the lower end of the valve body is a discharging opening. The valve element of the pulse feeding valve moves up and down for feeding, material blockage caused by poor flowability is avoided, meanwhile, materials are fed in a sealed space, the materials are not exposed in air, the materials are prevented from being lost and polluted, the flowability of the materials is guaranteed during feeding, and the materials are convenient to clean. The feeding valve is reliable in structure and high in sealing performance in the feeding process, the dustproof effect of the feeding port is good, materials cannot leak in the charging process, and waste and loss of the materials are reduced.

Description

Technical Field

[0001] The utility model relates to a feeding valve, in particular to a pulse feeding valve, and belongs to the technical field of silo equipment. Background Art

[0002] In the production process of metallurgy, food, fine chemicals, new energy materials and other fields, material transportation and feeding easily expose materials to the air, so the materials will inevitably be lost or contaminated. This is not energy-saving and environmentally friendly, is not good for product quality, and is not conducive to the realization of intelligent material transportation.

[0003] In the prior art, the traditional feeding devices are activation hoppers, butterfly valves, ball valves, gate valves, etc. A conical mechanism and butterfly valve are added in the middle of the silo, and a vibrator or air hammer is added to this section of the silo wall to vibrate the materials in the silo and promote the flow of materials. The conical mechanism in the middle of the activation hopper is fixed and cannot move up and down, and cannot effectively promote the flow of materials. The vibrator added to the outside of the silo is noisy and prone to malfunction. The butterfly valve below is prone to leakage after long-term use, and maintenance is not convenient. The activation hopper plus butterfly valve system takes up a large space as a whole, is complex to maintain, and has limited effect on promoting material flow.

[0004] In Chinese patent CN105422968, a pneumatic swing-type upward unfolding valve includes a cylinder, a bracket and a valve body. A valve stem is arranged through the cylinder, the bracket and the valve body, a piston is fixedly arranged at the bottom of the valve stem, the piston cooperates with the cylinder, a valve core is arranged at the top of the valve stem, the valve core cooperates with the valve at the top of the valve body, a cylindrical pin is fixedly arranged on the valve stem, a rotating shaft is sleeved on the top of the valve stem, a symmetrical spiral slide is arranged on the rotating shaft, the cylindrical pin is inserted at the bottom of the two spiral slides, the rotating shaft is sleeved and fixed with the valve core, and the discharge port is opened by the valve core. In this patent, the structure is simple and the operation is complicated. By arranging a cylindrical pin and a rotating shaft cooperating with the cylindrical pin on the valve stem, when the valve stem rises, it is easy to cause the material to be exposed to the air, and the material will inevitably be lost or contaminated. The structural reliability of the feeding device is poor, the sealing is poor during the feeding process, the dustproof effect of the feeding port is not good, and the material leaks during the loading, causing waste and loss in the production process. The upward expansion discharge valve is a horizontal line extending downward to form an inclined opening and closing port, and the valve stem drives the valve core to rotate to open and close the opening and closing port. When feeding, the material is easy to remain in the expansion part between the valve stem and the valve body, and the residual material is inconvenient to clean, and the residual material is easy to affect the normal operation of the valve and the service life of the valve body. Utility Model Content

[0005] In view of the defects existing in the prior art, the utility model sets a valve core assembly inside the opening at the lower end of the valve body, and the bottom of the valve core assembly is connected to an airway. Compressed air or other gases are introduced into the airway, and the compressed air or other gases enter the cylinder of the valve core assembly, pushing the piston to move upward, opening the valve core, and when the piston in the valve core assembly moves upward to the bottom of the piston through the exhaust hole, the compressed air in the cylinder is exhausted to the outside. The piston moves up and down under the action of air pressure, and the feeding channel is opened in such a repeated cycle, so that the valve core assembly is in a vibrating state, preventing bridging or clogging of materials with poor fluidity, and preventing the material from contacting with the air, resulting in material contamination.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A pulse feeding valve, comprising a valve body, a valve core assembly, and a cylinder assembly. The valve body is a sealing structure with openings at both ends, and a valve core assembly is arranged inside the lower opening of the valve body, and the valve core assembly is a retractable component. An airway is arranged at the lower opening of the valve body. The airway is connected to the bottom of the valve core assembly. The cylinder assembly is arranged on the outer side wall of the valve body. The upper opening of the valve body is a feed port, and when the valve core assembly moves upward, the lower opening of the valve body is a discharge port.

[0008] In the utility model, the valve core assembly includes a valve seat, a valve core, a cylinder body, a valve stem, and a piston. The side wall of the valve seat shrinks inward from top to bottom and extends to the opening at the lower end of the valve body. The upper end of the valve seat is connected to the inner side wall of the valve body. The valve core is arranged inside the valve seat. The cylinder body is a hollow structure with an opening at the lower end. The cylinder body is arranged inside the valve core. The valve stem runs through the interior of the cylinder body. The upper end of the valve stem is connected to the interior of the top end of the valve core. The lower end of the valve stem is connected to the piston, and the piston is arranged in the cylinder body. The valve stem moves inside the cylinder body through the piston. An elastic component is also sleeved on the valve stem located inside the cylinder body. Preferably, the valve seat is an inverted multi-segment conical structure, and the valve core is a conical umbrella-shaped structure.

[0009] In the utility model, the elastic component is one or more of a leaf spring, a coil spring, and a bellows.

[0010] In the utility model, the valve body comprises a bottom plate, which is arranged at the lower end opening of the valve body and connected to the side wall of the lower end opening of the valve body.

[0011] In the utility model, the bottom plate includes a discharge channel and an air hole. The air hole is arranged on the central axis of the bottom plate. The air channel is arranged on the bottom plate, and the air channel is connected to the air hole. The cylinder body is located above the bottom plate, and the side wall of the lower end of the cylinder body is connected to the bottom plate. The piston is located directly above the air hole. A discharge channel is arranged on the outer bottom plate at the connection between the cylinder body and the bottom plate. Preferably, the discharge channel is also provided with spokes, and the air channel passes through the spokes to the air hole. And / or

[0012] A connecting hole is also arranged at the periphery of the air hole, and the outer side wall of the cylinder body is movably connected to the connecting hole.

[0013] In the utility model, the air passages and spokes are provided in plurality, and the plurality of air passages all penetrate to the air holes along their respective spokes.

[0014] In the utility model, the valve core assembly further comprises an exhaust hole and a valve core seal. The exhaust hole is arranged at the upper end of the cylinder body and penetrates the side wall of the cylinder body. The valve core seal is arranged at the lower end of the valve core and contacts the valve seat.

[0015] In the utility model, the valve body is divided into an upper valve body, a middle valve body and a lower valve body from top to bottom. The upper valve body and the middle valve body are movably connected. The lower valve body is sleeved on the outer wall of the lower part of the middle valve body, and the lower valve body can move relative to the middle valve body. There are multiple sealing strips at the position where the lower outer wall of the middle valve body connects with the lower valve body, and a corrugated seal is provided at the upper part of the connection between the middle valve body and the lower valve body.

[0016] In the utility model, a sealing gasket is provided at the connection between the upper valve body and the middle valve body and / or at the connection between the cylinder body and the bottom plate.

[0017] In the utility model, a cylinder support is also arranged on the outer side wall of the middle valve body, a fixing flange is arranged on the outer side wall of the lower valve body, the tail of the cylinder assembly is fixed on the cylinder support, and the upper push rod of the cylinder assembly is connected to the fixing flange.

[0018] In the present invention, the bottom plate is further provided with a ring groove, which is arranged between the discharge channel and the outer side wall of the bottom plate and located at the upper and lower plate surfaces of the bottom plate, and the bottom of the valve seat is clamped in the ring groove at the upper part of the bottom plate.

[0019] In the utility model, the pulse feeding valve also includes a first sealing ring and a second sealing ring. The first sealing ring is sleeved on the outer wall of the piston and is located between the outer wall of the piston and the inner wall of the cylinder body. The upper end of the second sealing ring is clamped in the ring groove at the lower part of the bottom plate, and the lower end of the second sealing ring is provided with a first sealing ring.

[0020] In the present invention, the first sealing ring and the second sealing ring are annular structures.

[0021] In the utility model, the pulse feeding valve further comprises an ejector pin and a second sealing ring. The ejector pin is located directly below the bottom plate and connected to the lower plate surface of the bottom plate. The second sealing ring is arranged on the lower plate surface of the bottom plate.

[0022] The utility model provides a pulse feeding valve. In the existing feeding valve, the valve seat is arranged below the feeding channel, and a valve stem is arranged through the middle of the valve seat. The valve stem drives the valve core to open the feeding channel. When the valve stem rises, the material is easily exposed to the air during the feeding process. The material will inevitably be lost or contaminated. The sealing performance during the feeding process is poor, and the dustproof effect of the feeding port is not good. The material can easily enter the gap between the valve seat and the valve stem during the feeding process, resulting in the inability to lift and lower the valve stem. The pulse feeding valve is in a sealed state during the feeding process, so it has good dust and pollution prevention effects. The pulse valve is in a vibrating state through repeated cyclic motion of the piston to prevent bridging or clogging by materials with poor fluidity.

[0023] In the utility model, the pulse feeding valve includes a valve body, a valve core assembly, a cylinder assembly, and an airway. The valve body is a structure with upper and lower ends opening and sealed all around (the valve body can be rectangular, cylindrical, conical, etc.), the upper end opening of the valve body is the feed port, and the lower end opening of the valve body is the discharge port. A valve core assembly is arranged inside the lower end opening of the valve body, and the valve core assembly is a retractable component, and the discharge port of the valve body is opened by moving the valve core assembly up and down. An airway connected to the bottom of the valve core assembly is arranged at the lower end opening of the valve body, and the airway can provide thrust for the up and down movement of the valve core assembly. The cylinder assembly is arranged on the outer side wall of the valve body, and the cylinder assembly can control the up and down movement of the valve body, wherein a plurality of cylinder assemblies are arranged around the valve body.

[0024] In the utility model, the valve core assembly includes a valve seat, a valve core, a cylinder body, a valve stem, and a piston. The side wall of the valve seat shrinks inward from top to bottom and extends to the lower opening of the valve body, and the upper end of the valve seat is connected to the inner side wall of the valve body. The valve seat is an inverted multi-section conical structure. The valve core, the cylinder body, and the valve stem are all arranged inside the valve seat. The valve core is a conical umbrella-shaped structure. At the same time, a valve core seal is arranged at the lower end of the valve core (an annular groove can also be arranged at the lower part of the valve core, and a valve core seal is arranged on the side wall of the annular groove), and contacts with the inner side wall of the valve seat to perform a sealing function. The cylinder body is arranged inside the valve core, and the cylinder body is an internal hollow structure with an opening at the lower end, and the valve stem runs through the interior of the cylinder body. The upper end of the valve stem passes through the top of the cylinder body and is connected to the inside of the top of the valve core. The lower end of the valve stem is connected to the piston. The valve stem moves up and down inside the cylinder body through the piston. The outer wall of the piston is sleeved with a first sealing ring (which can be an O-type seal or a circular ring structure) and is located between the outer wall of the piston and the inner wall of the cylinder body. The piston is located directly above the air outlet of the airway (not marked in the figure), and the piston is pushed to move inside the cylinder body through the airway. An exhaust hole is set at the upper end of the cylinder body. When the gas in the airway enters the cylinder body and pushes the piston to the exhaust hole position, the valve core moves upward to open the feeding channel. When the gas is discharged through the exhaust hole, the piston descends and the feeding channel of the valve body is temporarily closed. An elastic component is also sleeved on the valve stem located inside the cylinder body, wherein the elastic component is one or more of a leaf spring, a coil spring, and a bellows. By arranging a valve core assembly at the lower opening of the valve body, the feeding of the valve body can be freely controlled. When the material is fed, the valve core and the lower opening of the valve body repeatedly contact and overlap, which, on the one hand, increases the sealing of the silo to prevent material overflow and pollutants from entering the silo. On the other hand, the valve core is kept in a vibrating state to prevent bridging or blockage by materials with poor fluidity.

[0025] In the utility model, a bottom plate (which may be a square, circular or other structure) is also provided at the lower opening of the valve body, and the bottom plate is connected to the side wall of the lower opening of the valve body (which may be a movable connection, a bolt connection, a threaded connection, etc.). An air hole is provided on the centerline axis of the bottom plate, and an air passage is provided on the bottom plate, and the air passage is connected to the air hole. The cylinder body is located above the bottom plate, and the side wall of the lower end of the cylinder body is connected to the bottom plate. A connecting hole may be provided on the periphery of the air hole, and the lower end of the cylinder body may be movably connected to the connecting hole provided on the bottom plate through a flange sealing disk. A sealing gasket is provided at the connection between the cylinder body and the bottom plate, and the piston is located directly above the air hole. A discharge channel is provided on the outer bottom plate at the connection between the cylinder body and the bottom plate, and spokes are also provided on the discharge channel, and the air channel passes through the spokes to the air hole. The air channel and the spokes are provided in a plurality, and the plurality of air channels all pass through the air hole along their respective spokes.

[0026] In the utility model, the valve body is divided into an upper valve body, a middle valve body, and a lower valve body from top to bottom. The upper valve body can be a tapered reducer structure, and two upper and lower flanges can be provided. The upper flange is connected to other storage bins such as a silo, and the lower flange is connected to the middle valve body. The upper valve body and the middle valve body can be connected by a sealing gasket and bolts, or can be directly welded into an integral structure. The lower valve body is sleeved on the outer wall of the lower part of the middle valve body, and the lower valve body can move relative to the middle valve body. There are multiple sealing strips (or more than one O-type seal) at the position where the lower outer wall of the middle valve body connects with the lower valve body. A corrugated seal is provided at the upper part of the connection between the middle valve body and the lower valve body. When the lower valve body moves relative to the middle valve body, the corrugated seal can be stretched. A cylinder support is also provided on the outer wall of the middle valve body. A fixed flange is provided on the outer wall of the lower valve body. The tail of the cylinder assembly is fixed on the cylinder support, and the upper push rod of the cylinder assembly is connected to the fixed flange.

[0027] In the utility model, a ring groove is also provided on the bottom plate. The ring groove is provided between the discharge channel and the outer side wall of the bottom plate, and is located on the upper and lower plate surfaces of the bottom plate. The bottom of the valve seat is clamped in the ring groove at the upper part of the bottom plate. A second sealing ring is clamped in the ring groove at the lower part of the bottom plate, and a first sealing ring is provided at the lower end of the second sealing ring, and the first sealing ring is a circular ring structure. A ejector pin is provided directly below the bottom plate, and the lower end of the petal-shaped ejector pin is in the shape of a petal and is connected to the lower plate surface of the bottom plate. A second sealing ring is provided on the lower plate surface of the bottom plate.

[0028] In the utility model, the silo moves to the lower part of the pulse feeding valve with the cooperation of the pallet or AGV trolley, and the center of the petal-shaped ejector pin is aligned with the center of the silo, so that feeding can be carried out. The cylinder assembly moves the push rod downward, and the lower valve body moves downward together with the valve core assembly and is inserted into the silo. At the same time, compressed air or other gases are introduced into the airway of the bottom plate of the lower valve body, and the compressed air or other gases enter the cylinder of the valve core assembly, pushing the piston to move upward and opening the valve core. When the piston in the assembly moves upward to the bottom of the piston through the exhaust hole, the compressed air in the cylinder is exhausted to the outside, the cylinder pressure is reduced, and the piston moves downward under the action of the spring. When the lower end of the piston blocks the exhaust hole, the pressure in the cylinder is restored, and the piston moves upward under the action of the air pressure. This repeated cycle makes the valve core vibrate to prevent bridging or blockage of materials with poor fluidity. The pulse feeding valve can be made of metal or non-metallic materials.

[0029] Compared with the prior art, the beneficial technical effects of the utility model are as follows:

[0030] 1. In the utility model, a valve core assembly is arranged at the lower opening of the valve body. The combination of the valve core assembly and the valve body makes feeding convenient, reduces the loss of materials during the filling process, has low use cost, is pollution-free, has a high degree of intelligence, has a good sealing effect, and has a high degree of automation.

[0031] 2. In the utility model, the pulse feeding valve feeds materials by moving the valve core up and down, and will not cause material blockage due to poor fluidity. At the same time, the material is fed in a sealed space and will not be exposed to the air, thus avoiding material loss and contamination, ensuring the fluidity of the material and facilitating material cleaning during feeding.

[0032] 3. In the utility model, there is a short mutual scraping process between the lower side wall of the valve core and the valve body, thereby effectively scraping off the material adhering to the joint between the valve core and the lower valve body, achieving the purpose of automatic cleaning. The valve core is a conical umbrella-shaped structure to improve the sealing performance of the discharge port. If the lower valve body is worn and the diameter of the discharge port becomes larger, the lower side wall of the valve core can still be tightly pressed on the annular inner wall layer, thereby effectively closing the discharge port and achieving a good sealing effect. The pulse feeding valve puts the valve core in a vibrating state, reduces the valve cleaning pressure, reduces the valve cleaning frequency, saves labor, reduces costs, has a simple and compact structure, is easy to install, and can maintain normal operation for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the pulse feeding valve of the utility model.

[0034] Figure 2 It is a structural schematic diagram of the valve core assembly of the utility model.

[0035] Figure 3 It is a structural schematic diagram of the bottom plate of the utility model.

[0036] Figure 4 It is a structural schematic diagram of the pulse feeding valve of the utility model when feeding.

[0037] Figure markings: A: valve body; A1: upper valve body; A2: middle valve body; A3: lower valve body; B: valve core assembly; 1: cylinder assembly; 2: air channel; 3: valve seat; 4: valve core; 5: cylinder body; 6: valve stem; 7: piston; 8: elastic component; 9: bottom plate; 901: discharge channel; 902: air hole; 903: connecting hole; 10: spoke; 11: exhaust hole; 12: valve core seal; 13: sealing strip; 14: corrugated seal; 15: sealing gasket; 16: cylinder support; 17: fixing flange; 18: ring groove; 19: first sealing ring; 20: second sealing ring; 21: first sealing ring; 22: ejector pin; 23: second sealing ring. DETAILED DESCRIPTION

[0038] The technical solution of the utility model is illustrated below, and the scope of protection requested for the utility model includes but is not limited to the following embodiments.

[0039] A pulse feeding valve, comprising a valve body A, a valve core assembly B, and a cylinder assembly 1. The valve body A is a sealing structure with openings at both ends, and the valve core assembly B is arranged inside the lower opening of the valve body A, and the valve core assembly B is a retractable component. An airway 2 is arranged at the lower opening of the valve body A. The airway 2 is connected to the bottom of the valve core assembly B. The cylinder assembly 1 is arranged on the outer side wall of the valve body A. The upper opening of the valve body A is a feed port, and when the valve core assembly B moves upward, the lower opening of the valve body A is a discharge port.

[0040] In the utility model, the valve core assembly B includes a valve seat 3, a valve core 4, a cylinder body 5, a valve stem 6, and a piston 7. The side wall of the valve seat 3 shrinks inward from top to bottom and extends to the opening at the lower end of the valve body A. The upper end of the valve seat 3 is connected to the inner side wall of the valve body A. The valve core 4 is arranged inside the valve seat 3. The cylinder body 5 is an internal hollow structure with an opening at the lower end. The cylinder body 5 is arranged inside the valve core 4. The valve stem 6 runs through the interior of the cylinder body 5. The upper end of the valve stem 6 is connected to the interior of the top end of the valve core 4. The lower end of the valve stem 6 is connected to the piston 7, and the piston 7 is arranged in the cylinder body 5. The valve stem 6 moves inside the cylinder body 5 through the piston 7. An elastic component 8 is also sleeved on the valve stem 6 located inside the cylinder body 5. The valve seat 3 is an inverted multi-segment conical structure, and the valve core 4 is a conical umbrella-shaped structure.

[0041] In the present invention, the elastic component 8 is one or more of a leaf spring, a coil spring, and a bellows.

[0042] In the present invention, the valve body A comprises a bottom plate 9. The bottom plate 9 is arranged at the lower end opening of the valve body A and connected to the side wall of the lower end opening of the valve body A.

[0043] In the utility model, the bottom plate 9 includes a discharge channel 901 and an air hole 902. The air hole 902 is arranged on the central axis of the bottom plate 9. The air channel 2 is arranged on the bottom plate, and the air channel 2 is connected with the air hole 902. The cylinder body 5 is located above the bottom plate 9, and the side wall of the lower end of the cylinder body 5 is connected to the bottom plate 9. The piston 7 is located directly above the air hole 902. The discharge channel 901 is arranged on the outer bottom plate 9 at the connection between the cylinder body 5 and the bottom plate 9. Spokes 10 are also arranged on the discharge channel 901, and the air channel 2 passes through the spokes 10 to the air hole 902.

[0044] In the present invention, a connecting hole 903 is further provided on the periphery of the air hole 902 , and the outer side wall of the cylinder body 5 is movably connected to the connecting hole 903 .

[0045] In the present invention, the air passage 2 and the spokes 10 are provided in plurality, and the plurality of air passages 2 are all passed through along the respective spokes 10 to the air hole 902 .

[0046] In the present invention, the valve core assembly B further includes an exhaust hole 11 and a valve core seal 12. The exhaust hole 11 is arranged at the upper end of the cylinder body 5 and penetrates the side wall of the cylinder body 5. The valve core seal 12 is arranged at the lower end of the valve core 4 and contacts the valve seat 3.

[0047] In the utility model, the valve body A is divided into an upper valve body A1, a middle valve body A2, and a lower valve body A3 from top to bottom. The upper valve body A1 and the middle valve body A2 are movably connected. The lower valve body A3 is sleeved on the outer wall of the lower part of the middle valve body A2, and the lower valve body A3 can move relative to the middle valve body A2. There are multiple sealing strips 13 at the position where the lower outer wall of the middle valve body A2 connects with the lower valve body A3, and a corrugated seal 14 is provided at the upper part where the middle valve body A2 and the lower valve body A3 are connected.

[0048] In the present invention, a sealing gasket 15 is provided at the connection between the upper valve body A1 and the middle valve body A2.

[0049] In the present invention, a sealing gasket 15 is provided at the connection between the cylinder body 5 and the bottom plate 9 .

[0050] In the present invention, a cylinder support 16 is further provided on the outer side wall of the middle valve body A2. A fixing flange 17 is provided on the outer side wall of the lower valve body A3. The tail of the cylinder assembly 1 is fixed on the cylinder support 16, and the upper push rod of the cylinder assembly 1 is connected to the fixing flange 17.

[0051] In the present invention, a circular groove 18 is further provided on the bottom plate 9. The circular groove 18 is provided between the discharge channel 901 and the outer side wall of the bottom plate 9 and is located on the upper and lower surfaces of the bottom plate 9. The bottom of the valve seat 3 is clamped in the circular groove 18 on the upper part of the bottom plate 9.

[0052] In the present utility model, the pulse dosing valve further includes a first sealing ring 19 and a second sealing ring 20. The first sealing ring 19 is sleeved on the outer wall of the piston 7 and is located between the outer wall of the piston 7 and the inner wall of the cylinder body 5. The upper end of the second sealing ring 20 is clamped in the lower ring groove 18 of the bottom plate 9, and the lower end of the second sealing ring 20 is provided with a first sealing ring 21.

[0053] In the present invention, the first sealing ring 19 and the second sealing ring 20 are annular structures.

[0054] In the present invention, the pulse feeding valve further comprises an ejector pin 22 and a second sealing ring 23. The ejector pin 22 is located directly below the bottom plate 9 and connected to the lower plate surface of the bottom plate 9. The second sealing ring 23 is arranged on the lower plate surface of the bottom plate 9.

[0055] Example 1

[0056] like Figure 1 As shown, a pulse feeding valve comprises a valve body A, a valve core assembly B, and a cylinder assembly 1. The valve body A is a sealing structure with openings at both ends, and the valve core assembly B is arranged inside the lower opening of the valve body A, and the valve core assembly B is a retractable component. An air passage 2 is arranged at the lower opening of the valve body A. The air passage 2 is connected to the bottom of the valve core assembly B. The cylinder assembly 1 is arranged on the outer side wall of the valve body A. The upper opening of the valve body A is a feed port, and when the valve core assembly B moves upward, the lower opening of the valve body A is a discharge port.

[0057] Example 2

[0058] like Figure 1 and Figure 2 As shown, Example 1 is repeated, except that the valve core assembly B includes a valve seat 3, a valve core 4, a cylinder body 5, a valve stem 6, and a piston 7. The side wall of the valve seat 3 shrinks inward from top to bottom and extends to the opening at the lower end of the valve body A. The upper end of the valve seat 3 is connected to the inner side wall of the valve body A. The valve core 4 is arranged inside the valve seat 3. The cylinder body 5 is an internal hollow structure with an opening at the lower end. The cylinder body 5 is arranged inside the valve core 4. The valve stem 6 runs through the interior of the cylinder body 5. The upper end of the valve stem 6 is connected to the interior of the top end of the valve core 4. The lower end of the valve stem 6 is connected to the piston 7, and the piston 7 is arranged in the cylinder body 5. The valve stem 6 moves inside the cylinder body 5 through the piston 7. An elastic component 8 is also sleeved on the valve stem 6 located inside the cylinder body 5. The valve seat 3 is an inverted multi-segment conical structure, and the valve core 4 is a conical umbrella-shaped structure.

[0059] Example 3

[0060] Embodiment 2 is repeated, except that the elastic member 8 is a leaf spring.

[0061] Example 3

[0062] The second embodiment is repeated except that the elastic member 8 is a coil spring.

[0063] Example 4

[0064] Example 2 is repeated, except that the elastic component 8 is a bellows.

[0065] Example 5

[0066] like Figure 1-3 As shown, the embodiment 4 is repeated, except that the valve body A includes a bottom plate 9. The bottom plate 9 is arranged at the lower end opening of the valve body A and connected to the side wall of the lower end opening of the valve body A.

[0067] Example 6

[0068] Example 5 is repeated, except that the bottom plate 9 includes a discharge channel 901 and an air hole 902. The air hole 902 is arranged on the central axis of the bottom plate 9. The air channel 2 is arranged on the bottom plate, and the air channel 2 is connected to the air hole 902. The cylinder body 5 is located above the bottom plate 9, and the side wall of the lower end of the cylinder body 5 is connected to the bottom plate 9. The piston 7 is located directly above the air hole 902. A discharge channel 901 is arranged on the outer bottom plate 9 at the connection between the cylinder body 5 and the bottom plate 9. Spokes 10 are also arranged on the discharge channel 901, and the air channel 2 passes through the spokes 10 to the air hole 902.

[0069] Example 7

[0070] Example 6 is repeated, except that a connecting hole 903 is further provided on the periphery of the air hole 902 , and the outer side wall of the cylinder body 5 is movably connected to the connecting hole 903 .

[0071] Example 8

[0072] Example 7 is repeated, except that the number of the air passages 2 and spokes 10 are both three, and the air passages 2 are all extended along the respective spokes 10 to the air holes 902 .

[0073] Example 9

[0074] Example 7 is repeated, except that the number of the air passages 2 and spokes 10 are both 6, and the air passages 2 are all extended along the respective spokes 10 to the air holes 902 .

[0075] Example 10

[0076] The embodiment 9 is repeated, except that the valve core assembly B further includes an exhaust hole 11 and a valve core seal 12. The exhaust hole 11 is arranged at the upper end of the cylinder body 5 and penetrates the side wall of the cylinder body 5. The valve core seal 12 is arranged at the lower end of the valve core 4 and contacts the valve seat 3.

[0077] Embodiment 11

[0078] Repeat Example 10, except that the valve body A is divided into an upper valve body A1, a middle valve body A2, and a lower valve body A3 from top to bottom. The upper valve body A1 and the middle valve body A2 are movably connected. The lower valve body A3 is sleeved on the outer wall of the lower part of the middle valve body A2, and the lower valve body A3 can move relative to the middle valve body A2. There are three sealing strips 13 at the position where the lower outer wall of the middle valve body A2 connects with the lower valve body A3, and a corrugated seal 14 is provided at the upper part where the middle valve body A2 and the lower valve body A3 are connected.

[0079] Example 12

[0080] Example 10 is repeated, except that six sealing strips 13 are provided at the position where the lower outer wall of the middle valve body A2 meets the lower valve body A3.

[0081] Embodiment 13

[0082] Example 12 is repeated, except that a sealing gasket 15 is provided at the connection between the upper valve body A1 and the middle valve body A2.

[0083] Embodiment 14

[0084] Example 13 is repeated, except that a sealing gasket 15 is provided at the connection between the cylinder body 5 and the bottom plate 9.

[0085] Embodiment 15

[0086] Example 14 is repeated, except that a cylinder support 16 is further provided on the outer wall of the middle valve body A2. A fixing flange 17 is provided on the outer wall of the lower valve body A3. The tail of the cylinder assembly 1 is fixed on the cylinder support 16, and the upper push rod of the cylinder assembly 1 is connected to the fixing flange 17.

[0087] Example 16

[0088] The embodiment 15 is repeated, except that a groove 18 is further provided on the bottom plate 9. The groove 18 is provided between the discharge channel 901 and the outer side wall of the bottom plate 9, and is located on the upper and lower surfaces of the bottom plate 9. The bottom of the valve seat 3 is clamped in the groove 18 on the upper part of the bottom plate 9.

[0089] Embodiment 17

[0090] Example 16 is repeated, except that the pulse feeding valve further includes a first sealing ring 19 and a second sealing ring 20. The first sealing ring 19 is sleeved on the outer wall of the piston 7 and is located between the outer wall of the piston 7 and the inner wall of the cylinder body 5. The upper end of the second sealing ring 20 is clamped in the lower ring groove 18 of the bottom plate 9, and the lower end of the second sealing ring 20 is provided with a first sealing ring 21.

[0091] Embodiment 18

[0092] Example 17 is repeated, except that the first sealing ring 19 and the second sealing ring 20 are circular ring structures.

[0093] Embodiment 19

[0094] The embodiment 18 is repeated, except that the pulse feeding valve further includes an ejector pin 22 and a second sealing ring 23. The ejector pin 22 is located directly below the bottom plate 9 and connected to the lower plate surface of the bottom plate 9. The second sealing ring 23 is arranged on the lower plate surface of the bottom plate 9.

Claims

1. A pulse feeding valve, characterized in that: The pulse feeding valve comprises a valve body (A), a valve core assembly (B), and a cylinder assembly (1); the valve body (A) is a sealing structure with upper and lower ends opening, the valve core assembly (B) is arranged inside the lower end opening of the valve body (A), and the valve core assembly (B) is a retractable component; an air passage (2) is arranged at the lower end opening of the valve body (A); the air passage (2) is connected to the bottom of the valve core assembly (B); the cylinder assembly (1) is arranged on the outer side wall of the valve body (A); the upper end opening of the valve body (A) is a feed inlet, and when the valve core assembly (B) moves upward, the lower end opening of the valve body (A) is a discharge outlet; The valve core assembly (B) comprises a valve seat (3), a valve core (4), a cylinder body (5), a valve stem (6), and a piston (7); the side wall of the valve seat (3) shrinks inward from top to bottom and extends to the opening at the lower end of the valve body (A); the upper end of the valve seat (3) is connected to the inner side wall of the valve body (A); the valve core (4) is arranged inside the valve seat (3); the cylinder body (5) is an internal hollow structure with an opening at the lower end; the cylinder body (5) is arranged inside the valve core (4); the valve stem (6) passes through the interior of the cylinder body (5); the upper end of the valve stem (6) is connected to the interior of the top end of the valve core (4); the lower end of the valve stem (6) is connected to the piston (7), the piston (7) is arranged in the cylinder body (5), and the valve stem (6) moves inside the cylinder body (5) through the piston (7); an elastic component (8) is also sleeved on the valve stem (6) located inside the cylinder body (5).

2. The pulse feeding valve according to claim 1 is characterized in that: The valve seat (3) is an inverted multi-section conical structure, and the valve core (4) is a conical umbrella-shaped structure.

3. The pulse feeding valve according to claim 1 is characterized in that: The elastic component (8) is one or more of a leaf spring, a coil spring, and a bellows.

4. The pulse feeding valve according to any one of claims 1 to 3, characterized in that: The valve body (A) comprises a bottom plate (9); the bottom plate (9) is arranged at the lower end opening of the valve body (A) and is connected to the side wall of the lower end opening of the valve body (A).

5. The pulse feeding valve according to claim 4 is characterized in that: The bottom plate (9) comprises a discharge channel (901) and an air hole (902); the air hole (902) is arranged on the central axis of the bottom plate (9); the air channel (2) is arranged on the bottom plate, and the air channel (2) is connected to the air hole (902); the cylinder body (5) is located above the bottom plate (9), and the side wall of the lower end of the cylinder body (5) is connected to the bottom plate (9); the piston (7) is located directly above the air hole (902); and a discharge channel (901) is arranged on the outer bottom plate (9) at the connection between the cylinder body (5) and the bottom plate (9).

6. The pulse feeding valve according to claim 5, characterized in that: The discharge channel (901) is further provided with spokes (10), and the air channel (2) passes through the spokes (10) to the air hole (902); and / or A connecting hole (903) is also provided on the periphery of the air hole (902), and the outer side wall of the cylinder body (5) is movably connected to the connecting hole (903).

7. The pulse feeding valve according to claim 6, characterized in that: The air passages (2) and spokes (10) are provided in a plurality, and the plurality of air passages (2) are all passed through along respective spokes (10) to the air holes (902).

8. The pulse feeding valve according to any one of claims 1 to 3, characterized in that: The valve core assembly (B) further comprises an exhaust hole (11) and a valve core seal (12); the exhaust hole (11) is arranged at the upper end of the cylinder body (5) and penetrates the side wall of the cylinder body (5); the valve core seal (12) is arranged at the lower end of the valve core (4) and contacts the valve seat (3).

9. The pulse feeding valve according to claim 4, characterized in that: The valve body (A) is divided into an upper valve body (A1), a middle valve body (A2), and a lower valve body (A3) from top to bottom; the upper valve body (A1) and the middle valve body (A2) are movably connected; the lower valve body (A3) is sleeved on the outer wall of the lower part of the middle valve body (A2), and the lower valve body (A3) can move relative to the middle valve body (A2); a plurality of sealing strips (13) are provided at the position where the lower outer wall of the middle valve body (A2) and the lower valve body (A3) meet, and a corrugated seal (14) is provided at the upper part where the middle valve body (A2) and the lower valve body (A3) are connected.

10. The pulse feeding valve according to claim 9, characterized in that: A sealing gasket (15) is provided at the connection between the upper valve body (A1) and the middle valve body (A2) and / or at the connection between the cylinder body (5) and the bottom plate (9).

11. The pulse feeding valve according to claim 10, characterized in that: A cylinder support (16) is also provided on the outer wall of the middle valve body (A2); a fixing flange (17) is provided on the outer wall of the lower valve body (A3); the tail of the cylinder assembly (1) is fixed on the cylinder support (16), and the upper push rod of the cylinder assembly (1) is connected to the fixing flange (17).

12. The pulse feeding valve according to claim 5, characterized in that: The bottom plate (9) is also provided with a circular groove (18); the circular groove (18) is arranged between the discharge channel (901) and the outer side wall of the bottom plate (9), and is located on the upper and lower plate surfaces of the bottom plate (9); the bottom of the valve seat (3) is clamped in the circular groove (18) on the upper part of the bottom plate (9).

13. The pulse feeding valve according to claim 12, characterized in that: The pulse dosing valve further comprises a first sealing ring (19) and a second sealing ring (20); the first sealing ring (19) is sleeved on the outer wall of the piston (7) and is located between the outer wall of the piston (7) and the inner wall of the cylinder body (5); the upper end of the second sealing ring (20) is clamped in the lower ring groove (18) of the bottom plate (9), and the lower end of the second sealing ring (20) is provided with a first sealing ring (21).

14. The pulse feeding valve according to claim 13, characterized in that: The first sealing ring (19) and the second sealing ring (20) are annular structures.

15. The pulse feeding valve according to claim 4, characterized in that: The pulse feeding valve also includes a ejector pin (22) and a second sealing ring (23); the ejector pin (22) is located directly below the bottom plate (9) and connected to the lower plate surface of the bottom plate (9); and the second sealing ring (23) is arranged on the lower plate surface of the bottom plate (9).

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