A barrier-free automatic cleaning valve

Abstract

A barrier-free automatic cleaning valve includes a valve body, a feed port is arranged at the top of the valve body, a discharge port is arranged at the bottom of the valve body, a valve core is arranged on the feed port, the valve core is a valve head made of a material having at least the hardness of a hard alloy, and the annular inner wall layer of the feed port is an annular inner wall layer made of a material having at least the hardness of a hard alloy, the valve core is connected to a driving mechanism through a driving rod, the feed port is connected to the discharge port through the inner cavity of the valve body, when the driving rod moves downward, the driving rod drives the valve core to move downward and seal with the feed port, when the driving rod moves upward, the driving rod drives the valve core to move upward and open the feed port. The advantages of the present invention are: the hardness of the joint between the valve core and the annular inner wall layer is high, which can crush the material and avoid the material remaining at the feed port; the material adhering to the joint between the valve core and the annular inner wall layer is scraped off to achieve the purpose of automatic cleaning.

Description

Technical Field

[0001] The invention relates to the technical field of valve manufacturing, in particular to a barrier-free automatic cleaning valve. Background Art

[0002] There is a Chinese invention patent application with application number CN201810913596.2 and titled "A Linked Blanking Valve", which discloses a linked blanking valve, including a cylinder, a partition, a spring, a wheel disc, a support rod, a flange, a straight cylinder, a cylinder shoulder, a cylinder, a discharge port, a blade, a comb tooth, a telescopic rod, a fulcrum, a conical disk, a damping ring, a servo motor, a bracket, a hoop, a rotating ring, and a protrusion; a cylinder shoulder is arranged above the cylinder, and the middle part of the cylinder shoulder extends upward to form a straight cylinder, a flange is arranged above the straight cylinder, and a part of the straight cylinder extends downward from the horizontal line of the cylinder shoulder to form an inclined opening and closing port, the conical disk closes or opens the opening and closing port, a support rod is arranged at the upper left corner of the conical disk, and the fulcrum is arranged at the junction of the cylinder shoulder and the straight cylinder, and the support rod drives the conical disk to rotate through the fulcrum to open and close the opening and closing port. However, when feeding, the material of the blanking valve is likely to remain on the transmission structure and the partition, and the residual material is inconvenient to clean. Moreover, the residual material is likely to affect the normal operation of the valve and the service life of the valve. In addition, the conical disc drive structure of the blanking valve occupies a large space and is inconvenient to install and use. Therefore, the structure of the blanking valve needs further improvement. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a barrier-free automatic cleaning valve which can crush and scrape materials at the feed inlet to avoid material residue, has a long service life, and is easy to install and clean.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: the barrier-free automatic cleaning valve comprises a valve body, a feed port is arranged at the top of the valve body, a discharge port is arranged at the bottom of the valve body, and a valve core capable of closing and opening the feed port is arranged on the feed port, characterized in that: the valve core is a valve head made of a material having at least the hardness of a hard alloy, and the lower part is conical, the annular inner wall layer of the feed port is an annular inner wall layer made of a material having at least the hardness of a hard alloy, the valve core is connected to the driving mechanism through a driving rod, and the feed port is connected with the discharge port through the inner cavity of the valve body, when the driving rod moves downward, the driving rod drives the valve core to move downward so that the conical outer peripheral surface contacts the annular inner wall layer and is sealed and positioned together with the feed port, and when the driving rod moves upward, the driving rod drives the valve core to move upward so that the conical outer peripheral surface is separated from the annular inner wall layer and the feed port is opened.

[0005] As an improvement, the cone of the lower part of the valve core may preferably be a cone, and the annular inner wall layer that contacts the lower part of the conical valve core and seals the feed port is a circular ring inner wall layer.

[0006] As a further improvement, the upper portion of the valve core may also be preferably conical, and the valve core is a cone with a large diameter in the middle portion and small diameters in the upper and lower portions.

[0007] As a further improvement, the valve core may preferably be an integral structure made of alloy steel, diamond grit or diamond material, and the annular inner wall layer is also an integral structure made of alloy steel, diamond grit or diamond material.

[0008] As a further improvement, the annular inner wall layer may preferably be an annular inner wall sleeve embedded in the feed port, and an annular sealing ring is provided between the inner circumference of the feed port and the outer circumference of the inner wall sleeve.

[0009] As an improvement, the valve body may preferably be composed of an upper valve seat and a lower valve shell sealed and connected, the feed port is located on the valve seat, the feed port on the valve seat is a trumpet-shaped through hole with a large diameter at the top and a small diameter at the bottom, the conical outer peripheral surface of the valve core contacts the annular inner wall layer at the small diameter opening at the bottom of the feed port and are sealed and positioned together.

[0010] As a further improvement, the driving mechanism may preferably be located in the inner cavity of the valve housing, the upper end of the driving rod extends out of the inner cavity of the valve housing through the feed port of the valve seat and is connected to the valve core, the driving mechanism is fixed to the valve housing via a positioning structure, and a through cavity through which materials can pass is left between the outer wall of the driving mechanism and the inner wall of the valve housing, and the through cavity is connected to the feed port and the discharge port.

[0011] Further improvement, the valve housing includes a positioning disk body, an upper guide ring and a lower guide ring, the upper opening of the upper guide ring is sealed and connected to the valve seat, the inner cavity of the upper guide ring is communicated with the valve seat through hole, the lower opening of the upper guide ring is sealed and connected to the top surface of the positioning disk body, the driving mechanism is connected to the middle part of the positioning disk body, the driving rod extends out of the positioning disk body and is connected to the valve core, a disk body through cavity is provided on the positioning disk body around the driving mechanism, the disk body through cavity is communicated with the inner cavity of the upper guide ring, the upper opening of the lower guide ring is sealed and connected to the bottom surface of the positioning disk body, the inner cavity of the lower guide ring is communicated with the disk body through cavity, and the lower opening of the lower guide ring is That is the discharge port. A disk through hole is vertically arranged in the middle of the positioning disk body. The top of the driving mechanism is screwed to the lower part of the disk through hole. The upper part of the driving rod passes through the disk through hole and is connected to the valve core. A guide block is sleeved on the upper part of the driving rod and can guide the material entering the inner cavity of the valve shell from the feed port to the discharge through cavity. The bottom of the guide block is connected to the upper part of the disk through hole. A positioning recess matched with the shape of the upper guide ring is arranged on the top surface of the positioning disk body. The upper opening of the disk through cavity is located on the bottom surface of the positioning recess. The bottom surface of the upper guide ring is attached to the bottom surface of the positioning recess, and the outer wall of the upper guide ring is sealed and contacts with the inner wall of the positioning recess.

[0012] For further improvement, the driving mechanism may preferably be a driving cylinder, the driving rod is a piston rod of the driving cylinder, the piston of the driving cylinder divides the inner cavity of the driving cylinder into an upper cavity and a lower cavity, the driving cylinder is provided with a first air inlet and outlet connected to the upper cavity and a second air inlet and outlet connected to the lower cavity, a first air inlet and outlet pipe connected to the first air inlet and outlet and a second air inlet and outlet pipe connected to the second air inlet and outlet are penetrated in the positioning disk body, or a first air inlet and outlet cavity and a second air inlet and outlet cavity are opened on the positioning disk body, the first air inlet and outlet cavity is connected to the first air inlet and outlet via a first air supply pipe, the second air inlet and outlet cavity is connected to the second air inlet and outlet via a second air supply pipe, The driving cylinder comprises a cylinder connecting head, a cylinder body, a cylinder head, a piston rod and a piston. The cylinder connecting head is connected to a positioning disk body. The upper end opening of the cylinder body is sealingly sleeved on the bottom of the cylinder connecting head. The lower end opening of the cylinder body is sealingly sleeved on the top of the cylinder head. The piston is movably arranged in the inner cavity of the cylinder body. The piston divides the inner cavity of the cylinder body into an upper air cavity and a lower air cavity. The upper air cavity is connected to a first air inlet and outlet located on the cylinder connecting head, and the lower air cavity is connected to a second air inlet and outlet located on the cylinder head. The piston rod is inserted and fixed on the piston. The upper end of the piston rod passes through the cylinder connecting head and the positioning disk body and is connected to the valve core. The lower end of the piston rod extends out of the cylinder head.

[0013] As an improvement, the driving mechanism may preferably be a driving cylinder, the driving rod is a piston rod of the driving cylinder, the cylinder plug of the driving cylinder divides the inner cavity of the driving cylinder into an upper oil chamber and a lower oil chamber, the driving cylinder is provided with a first oil inlet and outlet connected to the upper oil chamber and a second oil inlet and outlet connected to the lower oil chamber, a first oil inlet and outlet pipe connected to the first oil inlet and outlet and a second oil inlet and outlet pipe connected to the second oil inlet and outlet are penetrated in the positioning plate body, or a first oil inlet and outlet chamber and a second oil inlet and outlet chamber are opened on the positioning plate body, the first oil inlet and outlet chamber is connected to the first oil inlet and outlet via a first oil delivery pipe, and the second oil inlet and outlet chamber is connected to the second oil inlet and outlet via a second oil delivery pipe.

[0014] Compared with the prior art, the advantages of the present invention are: the valve core is a valve head with a tapered lower portion made of a material having at least the hardness of a hard alloy, and the annular inner wall layer of the feed port is an annular inner wall layer made of a material having at least the hardness of a hard alloy, the valve core and the annular inner wall layer are strong and wear-resistant, the service life of the feed port sealing structure is long, and the joint between the valve core and the annular inner wall layer is high in hardness, which can easily crush materials such as plastic particles to avoid material residue at the feed port, thereby achieving barrier-free feeding; when the valve core moves up and down relative to the annular inner wall layer, there is a short mutual scraping process between the lower side wall of the valve core and the annular inner wall layer, thereby effectively scraping off the material adhered to the joint between the valve core and the annular inner wall layer, thereby achieving the purpose of automatic cleaning; in addition, since the lower part of the valve core is tapered, it can be tightly pressed on the annular inner The wall layer improves the sealing performance of the feed port. Even if the top angle of the annular inner wall layer is worn and causes the feed port diameter to become larger, the lower side wall of the valve core can still be tightly pressed against the annular inner wall layer, thereby effectively closing the feed port and achieving a good sealing effect. A straight-cylinder falling structure is adopted, and the material leaves the discharge port from the feed through the valve body cavity. The material has few collisions during the falling process and falls quickly, and is not easy to remain in the inner cavity of the valve shell, thereby achieving barrier-free and rapid falling of the material, and can keep the inner cavity of the valve shell clean, reduce the valve cleaning pressure, reduce the valve cleaning frequency, save labor, and reduce costs. The valve driving mechanism is arranged in the inner cavity of the valve shell, occupies a small space, and is not affected by the external environment of the valve shell, so that a valve with a small size, simple and compact structure, easy installation, and can maintain normal operation for a long time can be produced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the embodiment of the present invention along the plane where the central axis is located without installing the corresponding gas transmission pipe;

[0016] Figure 2 for Figure 1 Schematic diagram of gas inlet and outlet after installing the corresponding gas pipeline;

[0017] Figure 3 yes Figure 2 Schematic diagram of reverse air inlet and outlet. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below with reference to the accompanying drawings.

[0019] like Figures 1 to 3As shown, the barrier-free automatic cleaning valve of this embodiment includes a valve body, a feed port is arranged at the top of the valve body, a discharge port 31 is arranged at the bottom of the valve body, a valve core 4 capable of closing and opening the feed port is arranged on the feed port, the valve core 4 is a valve head with a tapered lower portion made of a material having at least the hardness of a hard alloy, the annular inner wall layer 41 of the feed port is an annular inner wall layer 41 made of a material having at least the hardness of a hard alloy, the valve core 4 is connected to the driving mechanism through a driving rod 61, the feed port is connected to the discharge port 31 through the inner cavity of the valve body, when the driving rod 61 moves downward, the driving rod 61 drives the valve core 4 to move downward so that the tapered outer peripheral surface contacts the annular inner wall layer 41 and is sealed and positioned together with the feed port, when the driving rod 61 moves upward, the driving rod 61 drives the valve core 4 to move upward so that the tapered outer peripheral surface is separated from the annular inner wall layer 41 and the feed port is opened. The valve core 4 and the annular inner wall layer 41 can preferably be made of 6542 alloy. The valve core 4 can also adopt a structure similar to that at the feed port. The lower side wall of the valve core 4 is an alloy ring layer made of a material with at least the hardness of a hard alloy. At this time, if the alloy ring layer is sleeved on the lower side wall of the valve core, a sealing ring is arranged between the alloy ring layer and the lower side wall of the valve core.

[0020] The lower part of the valve core 4 is tapered, and the annular inner wall layer 41 that contacts the lower part of the tapered valve core 4 and seals the feed port is an annular inner wall layer. The upper part of the valve core 4 is also tapered, and the valve core 4 is a cone with a large diameter in the middle and small diameters in the upper and lower parts. The valve core 4 is an integral structure made of alloy steel, diamond grit or diamond material, and the annular inner wall layer 41 is also an integral structure made of alloy steel, diamond grit or diamond material. The annular inner wall layer 41 is an annular inner wall sleeve embedded in the feed port, and an annular sealing ring 42 is provided between the inner circumference of the feed port and the outer circumference of the inner wall sleeve.

[0021] The valve body is formed by the upper valve seat 5 and the lower valve shell being sealed and connected. The feed port is located on the valve seat 5. The feed port on the valve seat 5 is a trumpet-shaped through hole 51 with a large top diameter and a small bottom diameter. The conical outer peripheral surface of the valve core 4 contacts the annular inner wall layer 41 at the small diameter opening at the bottom of the feed port and is sealed and positioned together. The driving mechanism is located in the inner cavity 11 of the valve shell. The upper end of the driving rod 61 extends out of the inner cavity 11 of the valve shell through the feed port of the valve seat 5 and is connected to the valve core 4. The driving mechanism is fixed to the valve shell through the positioning structure. A through cavity for passing materials is left between the outer wall of the driving mechanism and the inner wall of the valve shell. The through cavity is connected to the feed port and the discharge port 31.

[0022] The valve housing includes a positioning disc body 1, an upper guide ring 2 and a lower guide ring 3, the upper opening of the upper guide ring 2 is sealed and connected to the valve seat 5, the inner cavity of the upper guide ring 2 is connected to the valve seat through hole 51, the lower opening of the upper guide ring 2 is sealed and connected to the top surface of the positioning disc body 1, the driving mechanism is connected to the middle part of the positioning disc body 1, the driving rod 61 extends out of the positioning disc body 1 and is connected to the valve core 4, a disc body through cavity is provided on the positioning disc body 1 around the driving mechanism, the disc body through cavity is connected to the inner cavity of the upper guide ring 2, the upper opening of the lower guide ring 3 is sealed and connected to the bottom surface of the positioning disc body 1, the inner cavity of the lower guide ring 3 is connected to the disc body through cavity, and the lower opening of the lower guide ring 3 is The material outlet 31 is provided with a through hole of the disk body vertically in the middle of the positioning disk body 1, the top of the driving mechanism is screwed to the bottom of the through hole of the disk body, the upper part of the driving rod 61 passes through the through hole of the disk body and is connected to the valve core 4, and a guide block 7 is sleeved on the upper part of the driving rod 61, which can guide the material entering the inner cavity 11 of the valve shell from the feed port to the material discharge cavity, and the bottom of the guide block 7 is connected to the upper part of the through hole of the disk body. A positioning recess matching the shape of the upper guide ring 2 is provided on the top surface of the positioning disk body 1, the upper opening of the through cavity of the disk body is located on the bottom surface of the positioning recess, the bottom surface of the upper guide ring 2 is attached to the bottom surface of the positioning recess, and the outer wall of the upper guide ring 2 is sealed against the inner wall of the positioning recess. A connecting flange is provided on the top of the lower guide ring 3, and the lower guide ring 3 is connected to the bottom surface of the positioning disk body 1 through the connecting flange. The lower part of the lower guide ring 3 is a lower hopper, and the bottom of the lower hopper is provided with a second flange that can be connected to a pipeline or a support frame.

[0023] The driving mechanism is a driving cylinder, the driving rod 61 is the piston rod of the driving cylinder, the piston 64 of the driving cylinder divides the inner cavity of the driving cylinder into an upper air cavity 65 and a lower air cavity 66, a first air inlet and outlet 67 connected to the upper air cavity 65 and a second air inlet and outlet 68 connected to the lower air cavity 66 are provided on the driving cylinder, a first air inlet and outlet pipe connected to the first air inlet and outlet 67 and a second air inlet and outlet pipe connected to the second air inlet and outlet 68 are penetrated in the positioning plate body 1, or a first air inlet and outlet cavity 12 and a second air inlet and outlet cavity 13 are opened on the positioning plate body 1, the first air inlet and outlet cavity 12 is connected to the first air inlet and outlet 67 via a first air supply pipe 14, and the second air inlet and outlet cavity 13 is connected to the second air inlet and outlet 68 via a second air supply pipe 15, and the driving cylinder includes Cylinder connecting head 62, cylinder body 6, cylinder head 63, piston rod and piston 64, the cylinder connecting head 62 is connected to the positioning disk body 1, the upper end opening of the cylinder body 6 is sealed and sleeved at the bottom of the cylinder connecting head 62, and the lower end opening of the cylinder body 6 is sealed and sleeved at the top of the cylinder head 63, the piston 64 is arranged in the inner cavity of the cylinder body 6 so as to be movable up and down, the piston 64 divides the inner cavity of the cylinder body into an upper air chamber 65 and a lower air chamber 66, the upper air chamber 65 is connected to the first air inlet and outlet 67 located on the cylinder connecting head 62, and the lower air chamber 66 is connected to the second air inlet and outlet 68 located on the cylinder head 63, the piston rod is inserted and fixed on the piston 64, the upper end of the piston rod passes through the cylinder connecting head 62 and the positioning disk body 1 and is connected to the valve core 4, and the lower end of the piston rod extends out of the cylinder head 63.

[0024] The driving mechanism can also use a driving cylinder, the driving rod is the piston rod of the driving cylinder, the cylinder plug of the driving cylinder divides the inner cavity of the driving cylinder into an upper oil chamber and a lower oil chamber, and a first oil inlet and outlet connected to the upper oil chamber and a second oil inlet and outlet connected to the lower oil chamber are provided on the driving cylinder, and a first inlet and outlet oil pipe connected to the first inlet and outlet oil port and a second inlet and outlet oil pipe connected to the second inlet and outlet oil port are penetrated in the positioning plate body, or a first inlet and outlet oil passage cavity and a second inlet and outlet oil passage cavity are opened on the positioning plate body, the first inlet and outlet oil passage cavity is connected to the first inlet and outlet oil port via a first oil delivery pipe, and the second inlet and outlet oil passage cavity is connected to the second inlet and outlet oil port via a second oil delivery pipe.

[0025] The barrier-free automatic cleaning valve of the second embodiment comprises a valve body, a feed port is arranged at the top of the valve body, a discharge port 31 is arranged at the bottom of the valve body, a valve core 4 capable of closing and opening the feed port is arranged on the feed port, the valve core 4 is a valve head with a tapered lower portion made of a material having at least the hardness of a hard alloy, the annular inner wall layer 41 of the feed port is an annular inner wall layer 41 made of a material having at least the hardness of a hard alloy, the valve core 4 is connected to the driving mechanism through a driving rod 61, the feed port is connected to the discharge port 31 through the inner cavity of the valve body, when the driving rod 61 moves downward, the driving rod 61 drives the valve core 4 to move downward so that the tapered outer peripheral surface contacts the annular inner wall layer 41 and is sealed and positioned together with the feed port, when the driving rod 61 moves upward, the driving rod 61 drives the valve core 4 to move upward so that the tapered outer peripheral surface separates from the annular inner wall layer 41 and opens the feed port. The valve core 4 and the annular inner wall layer 41 can preferably be made of 6542 alloy. The valve core 4 can also adopt a structure similar to that at the feed port. The lower side wall of the valve core 4 is an alloy ring layer made of a material with at least the hardness of a hard alloy. At this time, if the alloy ring layer is sleeved on the lower side wall of the valve core, a sealing ring is arranged between the alloy ring layer and the lower side wall of the valve core.

[0026] The lower part of the valve core 4 is tapered, and the annular inner wall layer 41 that contacts the lower part of the tapered valve core 4 and seals the feed port is an annular inner wall layer. The upper part of the valve core 4 is also tapered, and the valve core 4 is a cone with a large diameter in the middle and small diameters in the upper and lower parts. The valve core 4 is an integral structure made of alloy steel, diamond grit or diamond material, and the annular inner wall layer 41 is also an integral structure made of alloy steel, diamond grit or diamond material. The annular inner wall layer 41 is an annular inner wall sleeve embedded in the feed port, and an annular sealing ring 42 is provided between the inner circumference of the feed port and the outer circumference of the inner wall sleeve.

[0027] The valve body is formed by the upper valve seat 5 and the lower valve shell being sealed and connected. The feed port is located on the valve seat 5. The feed port on the valve seat 5 is a trumpet-shaped through hole 51 with a large top diameter and a small bottom diameter. The conical outer peripheral surface of the valve core 4 contacts the annular inner wall layer 41 at the small diameter opening at the bottom of the feed port and is sealed and positioned together. The driving mechanism is located in the inner cavity 11 of the valve shell. The upper end of the driving rod 61 extends out of the inner cavity 11 of the valve shell through the feed port of the valve seat 5 and is connected to the valve core 4. The driving mechanism is fixed to the valve shell through the positioning structure. A through cavity for passing materials is left between the outer wall of the driving mechanism and the inner wall of the valve shell. The through cavity is connected to the feed port and the discharge port 31.

[0028] The valve housing is an integrated housing, and the positioning structure is a positioning block inserted on the side wall of the housing. One end of the positioning block extends into the inner cavity 11 of the valve housing and is connected to the driving mechanism, and the other end of the positioning block extends out of the outer wall of the valve housing. There are multiple positioning blocks, and the multiple positioning blocks are arranged at intervals from each other. A first block through cavity connecting the inner cavity of the valve housing and the outside of the valve housing is provided on one positioning block, and a second block through cavity connecting the inner cavity of the valve housing and the outside of the valve housing is provided on another positioning block. The driving mechanism is a driving cylinder, and the piston of the driving cylinder divides the driving cylinder into an upper air cavity 65 and a lower air cavity 66. A first through cavity connected to the upper air cavity 65 is provided on the driving cylinder. The air inlet and outlet 67 and the second air inlet and outlet 68 connected to the lower air cavity 66, the first block cavity is connected to the first air inlet and outlet 67 via the first air pipe 14, and the second block cavity is connected to the second air inlet and outlet 68 via the second air pipe 15, or the driving mechanism is a driving cylinder, the piston of the driving cylinder divides the driving cylinder into an upper oil chamber and a lower oil chamber, and the driving cylinder is provided with a first oil inlet and outlet connected to the upper oil chamber and a second oil inlet and outlet connected to the lower oil chamber, the first block cavity is connected to the first oil inlet and outlet via the first oil pipe, and the second block cavity is connected to the second oil inlet and outlet via the second oil pipe.

[0029] The driving mechanism can also use a driving cylinder, the driving rod is the piston rod of the driving cylinder, the cylinder plug of the driving cylinder divides the inner cavity of the driving cylinder into an upper oil chamber and a lower oil chamber, and a first oil inlet and outlet connected to the upper oil chamber and a second oil inlet and outlet connected to the lower oil chamber are provided on the driving cylinder, and a first inlet and outlet oil pipe connected to the first inlet and outlet oil port and a second inlet and outlet oil pipe connected to the second inlet and outlet oil port are penetrated in the positioning plate body, or a first inlet and outlet oil passage cavity and a second inlet and outlet oil passage cavity are opened on the positioning plate body, the first inlet and outlet oil passage cavity is connected to the first inlet and outlet oil port via a first oil delivery pipe, and the second inlet and outlet oil passage cavity is connected to the second inlet and outlet oil port via a second oil delivery pipe.

[0030] Working principle: the valve core is pressed against the annular inner wall layer to seal the feed port. When the second inlet and outlet air cavity is inlet, the gas enters the second inlet and outlet through the second gas pipe and enters the lower air cavity. The piston is pushed upward by the gas, thereby driving the piston rod to lift the valve core. The material enters the inner cavity of the valve shell from the feed port and leaves the device from the discharge port through the lower material cavity. After the discharge is completed, the first inlet and outlet air cavity is inlet, and the gas enters the first inlet and outlet through the first gas pipe and enters the upper air cavity. The piston is pushed downward by the gas, thereby driving the piston rod to move downward. The valve core is pressed against the annular inner wall layer to close the feed port.

Claims

1. A barrier-free automatic cleaning valve, comprising a valve body, a feed inlet is arranged at the top of the valve body, a discharge port (31) is arranged at the bottom of the valve body, and a valve core (4) capable of closing and opening the feed inlet is arranged on the feed inlet, characterized in that: The valve core (4) is a valve head with a conical lower portion made of a material having at least the hardness of a hard alloy. The annular inner wall layer (41) of the feed port is an annular inner wall layer (41) made of a material having at least the hardness of a hard alloy. The valve core (4) is connected to a driving mechanism via a driving rod (61). The feed port is connected to the discharge port (31) via the inner cavity of the valve body. When the driving rod (61) moves downward, the driving rod (61) drives the valve core (4) to move downward so that the conical outer peripheral surface contacts the annular inner wall layer (41) and is sealed and positioned together with the feed port. When the driving rod (61) moves upward, the driving rod (61) drives the valve core (4) to move upward so that the conical outer peripheral surface separates from the annular inner wall layer (41) and is opened. Feed inlet; the valve body is formed by a valve seat (5) at the top and a valve shell at the bottom, which are sealed and connected. The feed inlet is located on the valve seat (5). The feed inlet on the valve seat (5) is a trumpet-shaped through hole (51) with a large diameter at the top and a small diameter at the bottom. The conical outer peripheral surface of the valve core (4) contacts the annular inner wall layer (41) at the small diameter opening at the bottom of the feed inlet and is sealed and positioned together; the driving mechanism is located in the inner cavity (11) of the valve shell, and the upper end of the driving rod (61) extends out of the inner cavity (11) of the valve shell through the feed inlet of the valve seat (5) and is connected to the valve core (4). The driving mechanism is fixed to the valve shell through a positioning structure. A through cavity through which materials can pass is reserved between the outer wall of the driving mechanism and the inner wall of the valve shell, and the through cavity is connected to the feed inlet and the discharge port (31);The valve housing comprises a positioning disc body (1), an upper guide ring (2) and a lower guide ring (3); the upper opening of the upper guide ring (2) is sealedly connected to the valve seat (5); the inner cavity of the upper guide ring (2) is connected to the trumpet-shaped through hole (51); the lower opening of the upper guide ring (2) is sealedly connected to the top surface of the positioning disc body (1); the driving mechanism is connected to the middle part of the positioning disc body (1); the driving rod (61) extends out of the positioning disc body (1) and is connected to the valve core (4); a disc body through cavity is provided on the positioning disc body (1) around the driving mechanism; the disc body through cavity is connected to the inner cavity of the upper guide ring (2); the upper opening of the lower guide ring (3) is sealedly connected to the bottom surface of the positioning disc body (1); the inner cavity of the lower guide ring (3) is connected to the disc body through cavity; the lower guide ring The lower opening of (3) is the discharge port (31), a disk body through hole is vertically arranged in the middle of the positioning disk body (1), the top of the driving mechanism is screwed to the lower part of the disk body through hole, the upper part of the driving rod (61) passes through the disk body through hole and is connected to the valve core (4), and a guide block (7) is sleeved on the upper part of the driving rod (61) to guide the material entering the valve shell inner cavity (11) from the feed port to the discharge cavity, the bottom of the guide block (7) is connected to the upper part of the disk body through hole, and a positioning recess matched with the outer shape of the upper guide ring (2) is arranged on the top surface of the positioning disk body (1), the upper opening of the disk body through cavity is located on the bottom surface of the positioning recess, the bottom surface of the upper guide ring (2) is attached to the bottom surface of the positioning recess, and the outer wall of the upper guide ring (2) is sealed and abuts against the inner wall of the positioning recess;The driving mechanism is a driving cylinder, the driving rod (61) is a piston rod of the driving cylinder, the piston (64) of the driving cylinder divides the inner cavity of the driving cylinder into an upper cavity (65) and a lower cavity (66), the driving cylinder is provided with a first air inlet and outlet (67) connected to the upper cavity (65) and a second air inlet and outlet (68) connected to the lower cavity (66), the positioning disk body (1) is penetrated with a first air inlet and outlet pipe connected to the first air inlet and outlet (67) and a second air inlet and outlet pipe connected to the second air inlet and outlet (68), or the positioning disk body (1) is provided with a first air inlet and outlet cavity (12) and a second air inlet and outlet cavity (13). Two inlet and outlet air passage chambers (13), the first inlet and outlet air passage chamber (12) is connected to the first inlet and outlet port (67) via a first air supply pipe (14), the second inlet and outlet air passage chamber (13) is connected to the second inlet and outlet port (68) via a second air supply pipe (15), the driving cylinder comprises a cylinder connector (62), a cylinder body (6), a cylinder cover (63), a piston rod and a piston (64), the cylinder connector (62) is connected to the positioning plate body (1), the upper end opening of the cylinder body (6) is sealingly sleeved on the bottom of the cylinder connector (62), the lower end opening of the cylinder body (6) is sealingly sleeved on the top of the cylinder cover (63), the The piston (64) is arranged in the inner cavity of the cylinder body (6) so as to be movable up and down. The piston (64) divides the inner cavity of the cylinder body into an upper air cavity (65) and a lower air cavity (66). The upper air cavity (65) is connected to a first air inlet and outlet (67) located on the cylinder connecting head (62), and the lower air cavity (66) is connected to a second air inlet and outlet (68) located on the cylinder cover (63). The piston rod is fixed on the piston (64). The upper end of the piston rod passes through the cylinder connecting head (62) and the positioning plate body (1) and is connected to the valve core (4). The lower end of the piston rod extends out of the cylinder cover (63); or: the driving mechanism is a driving mechanism. Oil cylinder, the driving rod is the piston rod of the driving oil cylinder, the oil cylinder plug of the driving oil cylinder divides the inner cavity of the driving oil cylinder into an upper oil cavity and a lower oil cavity, the driving oil cylinder is provided with a first oil inlet and outlet connected to the upper oil cavity and a second oil inlet and outlet connected to the lower oil cavity, the positioning plate body is penetrated with a first oil inlet and outlet pipe connected to the first oil inlet and outlet and a second oil inlet and outlet pipe connected to the second oil inlet and outlet, or the positioning plate body is provided with a first oil inlet and outlet cavity and a second oil inlet and outlet cavity, the first oil inlet and outlet cavity is connected to the first oil inlet and outlet via a first oil delivery pipe, and the second oil inlet and outlet cavity is connected to the second oil inlet and outlet via a second oil delivery pipe. ; 2. The barrier-free automatic cleaning valve according to claim 1, characterized in that: The cone shape of the lower part of the valve core (4) is a cone shape, and the annular inner wall layer (41) that contacts the lower part of the conical valve core (4) and seals the feed inlet is a circular ring inner wall layer.

3. The barrier-free automatic cleaning valve according to claim 2, characterized in that: The upper part of the valve core (4) is also conical, and the valve core (4) is a cone with a large diameter in the middle and small diameters in the upper and lower parts.

4. The barrier-free automatic cleaning valve according to claim 3, characterized in that: The valve core (4) is an integral structure made of alloy steel, corundum or diamond material, and the annular inner wall layer (41) is also an integral structure made of alloy steel, corundum or diamond material.

5. The barrier-free automatic cleaning valve according to any one of claims 1 to 4, characterized in that: The annular inner wall layer (41) is a circular inner wall sleeve embedded in the feed port, and a circular sealing ring (42) is provided between the inner circumference of the feed port and the outer circumference of the inner wall sleeve.

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