CN114278769A

CN114278769A - Water inlet valve with instant sewage discharging function

Info

Publication number: CN114278769A
Application number: CN202111548523.6A
Authority: CN
Inventors: 董服义
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-04-05

Abstract

The invention discloses a water inlet valve with an instant sewage discharge function, which comprises a valve body, a water inlet valve and a water outlet valve, wherein the valve body is provided with a medium flow passage for medium circulation and is provided with a first channel and a second channel; the control assembly is arranged on the valve body and used for opening and closing the medium flow passage; the filter structure is arranged on the valve body, and a medium enters from the first channel, sequentially flows through the control assembly and the filter structure, and then flows out from the second channel; and the blowdown part is arranged on the valve body and is used for being matched with the filtering structure and/or the medium flow passage to discharge impurities in the valve body. According to the invention, by limiting the relative position of the filtering structure and the control assembly, when the impurities in the valve and in the pipeline need to be cleaned, the impurities in the filtering structure and the pipeline can be discharged without closing the main valve or the control assembly of the pipeline in the cleaning process, so that the water cut of the rear water using equipment is avoided, the damage caused by no water and no air burning of the rear water boiling equipment is protected, the maintenance is convenient, and the cleaning efficiency is high.

Description

Water inlet valve with instant sewage discharging function

Technical Field

The invention belongs to the technical field of valves, and particularly relates to a water inlet valve with an instant sewage discharge function.

Background

In a waterway circulation system of a floor heating or wall-hanging stove system, a water inlet valve is one of the common components for controlling the opening and closing of a water inlet waterway. The inlet valve typically includes a valve body and a filter element disposed within the valve body for filtering impurities in the flow medium. Because the water contains some substances, silt, raw material belts and other small impurities, the impurities can remain in the filter element, and under the condition of long-time use, the water inlet valve and the internal water pipe are easily blocked, or parts such as an exhaust valve, a temperature and pressure measuring meter and the like on rear water using equipment are easily damaged, so that the impurities in the water inlet valve need to be cleaned frequently.

However, as shown in fig. 18, the inlet valve used in the wall-hanging stove system includes a first flow passage 71, a filter 73, a second flow passage 72, and a valve core 74; the medium enters from the first flow channel 71, sequentially enters the filter element 73 and the valve core 74 and then flows out through the second flow channel 72; before impurities need to be cleaned, the liquid inlet pipeline needs to be closed firstly, and a main gate for closing the liquid inlet pipeline is usually arranged at a place far away from the water inlet valve, so that the maintenance is inconvenient, and the cleaning efficiency is low; even after the main gate is closed, when the filter screen on the water inlet valve is detached or disassembled for sewage disposal, water in the pipeline between the main gate and the water inlet valve and water in the floor heating or wall-hanging furnace system can be discharged from the position where the filter piece is installed on the water inlet valve, so that waste or surface water accumulation is easily caused.

Disclosure of Invention

The invention provides a water inlet valve with an instant sewage discharge function in order to overcome the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: a water inlet valve with instant sewage discharging function comprises

The valve body is provided with a medium flow passage for medium circulation and is provided with a first channel and a second channel;

the control assembly is arranged on the valve body and used for opening and closing the medium flow passage; the control assembly comprises a ceramic valve core arranged on the valve body and a hand wheel connected with the ceramic valve core, the liquid inlet end of the ceramic valve core is communicated with the middle cavity, and the liquid outlet end of the ceramic valve core is communicated with the second channel;

the filter structure is arranged on the valve body, and a medium enters from the first channel, sequentially flows through the control assembly and the filter structure, and then flows out from the second channel;

and the blowdown part is arranged on the valve body and is used for being matched with the filtering structure and/or the medium flow passage to discharge impurities in the valve body.

Optionally, the filtering structure includes an intermediate cavity disposed in the valve body and at least a part of the filtering member located in the intermediate cavity, and the filtering member blocks the communication port between the intermediate cavity and the second passage.

Optionally, the filter element is provided with an opening through which the medium can pass, and the medium enters an area on one side of the filter element away from the second channel through the opening.

Optionally, the intermediate cavity includes a first chamber for installing the filter element and a second chamber disposed on the liquid inlet side of the first chamber, and the medium flowing through the control assembly enters the second chamber.

Optionally, a plane perpendicular to the center line of the second passage is used as a third reference plane, wherein a projection of a wall constituting the second chamber on the third reference plane is partially overlapped with a projection of the control assembly on the third reference plane.

Optionally, the filtering member is of a tubular filter screen structure, and a boss abutting against one end of the filtering member is arranged between the second chamber and the first chamber.

Optionally, the liquid inlet end of the filter element is sleeved on the boss, the outer wall of the boss is a conical surface, and the outer diameter of the boss gradually increases in a direction away from the valve seat.

Optionally, a secondary channel is further disposed between the intermediate cavity and the second channel.

Optionally, a plane passing through the center line of the middle chamber and the center line of the second channel at the same time is taken as a second reference plane, and an included angle between a projection of the center line of the middle chamber on the second reference plane and a projection of the center line of the second channel on the second reference plane is β, wherein β is greater than or equal to 30 ° and less than or equal to 90 °.

Optionally, the blowdown part includes a valve seat disposed on the valve body, an inner cavity disposed in the valve seat and communicated with the medium flow channel, a branch pipe disposed on the valve seat and communicated with the inner cavity, and a switch assembly for controlling the communication between the inner cavity and the medium flow channel.

In conclusion, the beneficial effects of the invention are as follows:

1. according to the invention, by limiting the relative position of the filtering structure and the control assembly, when the impurities in the valve and in the pipeline need to be cleaned, the impurities in the filtering structure and the pipeline can be discharged without closing the main valve or the control assembly of the pipeline in the cleaning process, so that the water cut of the rear water using equipment is avoided, the damage caused by no water and no air burning of the rear water boiling equipment is protected, the maintenance is convenient, and the cleaning efficiency is high.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a cross-sectional view of fig. 1.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is an enlarged view at B in fig. 2.

Fig. 5 is an enlarged view at C in fig. 2.

Fig. 6 is a front view of fig. 1.

Fig. 7 is a cross-sectional view taken along line D-D of fig. 6.

Fig. 8 is a perspective view of another embodiment of fig. 1.

Fig. 9 is a cross-sectional view of fig. 8.

Fig. 10 is an enlarged view at E in fig. 9.

Fig. 11 is a front view of fig. 10.

Fig. 12 is a cross-sectional view taken along F-F of fig. 11.

FIG. 13 is a perspective view of one of the embodiments of FIG. 8.

Fig. 14 is a perspective view of the alternative embodiment of fig. 8.

Fig. 15 is a schematic view of the structure of the shrinkable sleeve in fig. 14.

Fig. 16 is a schematic view of the connecting core of fig. 14.

Fig. 17 is a schematic structural view of the pollution discharge part of the invention being a plug head.

Fig. 18 is a schematic view showing a structure of a feed valve used in a conventional wall-hanging stove system.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

Referring to fig. 1, 2, 4 and 7, a water inlet valve with an instant sewage function includes a valve body 10, a control assembly 60, a filtering structure and a sewage discharging part; the valve body 10 is a metal piece made of stainless steel or brass, a medium flow channel 11 for medium to flow is formed in the valve body 10, the medium flow channel 11 is a through cavity, and the valve body is provided with a first channel 111 and a second channel 112; the control assembly 60 is arranged on the valve body and used for opening and closing the medium flow passage; the filter structure is arranged on the valve body 10, and a medium enters from the first channel 111, sequentially flows through the control assembly and the filter structure, and then flows out through the second channel 112; the blowdown part is arranged on the valve body 10 and is used for being matched with the filtering structure and/or the medium flow passage 11 to discharge impurities in the valve body instantly.

Referring to fig. 2 and 9, in some embodiments, the filtering structure includes an intermediate cavity 113 disposed in the valve body 10 and a filtering member 20 at least partially disposed in the intermediate cavity 113, the intermediate cavity 11 is respectively communicated with the first passage 111 and the second passage 112, and the filtering member 20 shields the communication port of the intermediate cavity 113 and the second passage 112 to filter impurities in the medium; the filter element 20 is provided with openings through which the medium can pass, and the medium enters the area of the filter element on the side remote from the second channel.

Referring to fig. 2 and 9, in some embodiments, the filter element 20 is provided as a tubular screen structure and is inserted at least partially into the intermediate chamber, the opening being located at the end of the filter element facing the control assembly. The outer diameter of the filter element 20 is smaller than the inner diameter of the intermediate cavity 113, so that the medium flowing out from the filter element 20 in the whole circumferential direction can enter the second channel 112 through the gap between the filter element 20 and the intermediate cavity 113, thereby preventing impurities from blocking the second channel 112 due to blocking the filter element 20 corresponding to the second channel 112, and prolonging the maintenance period of the water inlet valve.

Referring to fig. 2 and 9, in some embodiments, the intermediate chamber 113 includes a first chamber 1131 for receiving a filter element and a second chamber 1132 disposed on the inlet side of the first chamber 1131, and the medium flowing through the control assembly enters the second chamber 1132. Through setting up second cavity 1132 for first cavity leaves blowdown part one end and second cavity intercommunication far away, and the circumference lateral wall and the second passageway intercommunication of middle chamber, make the structure of blowdown part and valve body compacter, thereby reduce the whole height of valve, save occupation space.

Referring to fig. 1-5, in some embodiments, the waste includes a valve seat 30, a manifold 31, and a switch assembly 50; the valve seat 30 is in threaded connection with the valve body 10, and the valve seat 30 is provided with an inner cavity 32 communicated with the medium flow passage 11; a first sealing element 41 is arranged between the valve seat 30 and the valve body 10, so that the sealing effect is improved; the branch pipe 31 is arranged on the valve seat 30 and communicated with the inner cavity 32, and the branch pipe 31 and the valve seat 30 are integrally formed; the switch assembly 50 is arranged on the valve seat 30 and used for controlling the communication between the inner cavity 32 and the medium flow passage 11; when the impurities in the valve need to be cleaned, the inner cavity 32 is controlled to be communicated with the medium flow channel 11 through the switch assembly 50, and the impurities remained in the filter element 20 enter the inner cavity 32 under the scouring of the medium and are discharged through the branch pipe 31; the invention does not need to close the main valve of the pipeline in the cleaning process, is convenient to maintain and has high cleaning efficiency; and an external pipeline can be connected to the branch pipe 31 to guide the sewage discharged by the branch pipe 31, so that water resource waste is not easy to cause, and accumulated water on the ground is avoided.

Referring to FIGS. 6 and 7, in some embodiments, a plane passing through both the centerline of the bore 32 and the centerline of the branch tube 31 is taken as a first reference plane, and the angle α between the projection of the centerline of the branch tube 31 on the first reference plane and the projection of the centerline of the bore 32 on the first reference plane is taken as α, wherein α is greater than or equal to 90 ° and less than or equal to 130 °; preferably, α is 110 °. Through the structure, the resistance of the joint of the branch pipe 31 and the valve seat 30 to medium flowing through is reduced, so that the medium entering the inner cavity 32 is easily led out from the branch pipe 31, and the impurities are prevented from being deposited in the inner cavity 32.

Referring to fig. 1 and 7, in some embodiments, a plurality of teeth 311 are disposed on an outer wall of the branch pipe 31 at intervals along an axial direction of the branch pipe 31, and the teeth 311 are integrally formed with the branch pipe 31; by providing the teeth 311, the stability of the connection is improved when the hose is sleeved outside the branch pipe 31. A plane passing through the central line of the branch pipe and the central line of the inner cavity is taken as a reference plane, and an included angle is formed between the reference plane and the fourth reference plane; preferably, the included angle between the reference plane and the fourth reference plane is 90 °; by limiting the orientation of the branch pipe, the connection of the branch pipe and an external pipeline is facilitated.

Referring to fig. 7, in some embodiments, the branch pipe 31 is provided with a blocking cover 34 for blocking a liquid outlet of the branch pipe, so as to prevent a blowoff valve switch assembly from not completely blocking the communication between the inner cavity and the medium flow passage, thereby causing a drip problem and serving as a safety function.

Referring to fig. 2, in some embodiments, the first channel 111 and the second channel 112 are perpendicular to each other, and are suitable for corner connection.

Referring to FIG. 2, in some embodiments, a plane passing through both the centerline of the central chamber 113 and the centerline of the second channel 112 is taken as a second reference plane, and an angle β is taken between a projection of the centerline of the central chamber 113 onto the second reference plane and a projection of the centerline of the second channel 112 onto the second reference plane, wherein β is greater than or equal to 30 ° and less than or equal to 90 °; preferably, β is 67 °.

Referring to fig. 2 and 9, in some embodiments, a plane perpendicular to the center line of the second channel 112 is taken as a third reference plane, wherein the projection of the wall forming the second chamber on the third reference plane is partially overlapped with the projection of the control assembly 60 on the third reference plane, so that the overall height of the switch assembly is reduced, the volume of the water inlet valve is reduced, and the occupied space is saved.

Referring to fig. 2 and 3, in some embodiments, the filter element 20 is inserted at one end at least partially into the valve seat 30 and communicates with the internal cavity 32; a boss 12 is arranged between the first chamber 1131 and the second chamber 1132, a central hole for medium circulation is formed in the middle of the boss 12, one end of the filter element, which is far away from the valve seat, abuts against the boss, and the liquid inlet end of the filter element 20 is partially sleeved on the boss 12; the medium entering from the first channel 111 enters the filter element 20 after passing through the boss 12, the medium can flow out of the meshes of the filter element 20 and enter the second channel 112, and the impurities are blocked in the filter element 20 by the filter element 20; and the boss 12 is matched with the filter element 20 to improve the stability of the filter element 20, and the filter element 20 is prevented from being displaced under the impact of high-pressure media to influence the filtering effect.

Referring to fig. 9, in some embodiments, a secondary passage 114 is further provided between the intermediate chamber 113 and the second passage 112, and the flow rate of the medium between the intermediate chamber 114 and the second passage 112 is increased by slightly modifying the structure of the valve body.

Referring to fig. 2 and 3, in some embodiments, the outer wall of the boss 12 is tapered, and the outer diameter of the boss 12 increases away from the valve seat 30, so as to guide the filter element 20 when the filter element 20 is inserted, and facilitate alignment of the filter element 20 into the boss 12.

Referring to fig. 1 and 2, in some embodiments, the liquid inlet end of the valve body 10 is provided with a first connection head 13, and the first connection head 13 is one of a male connection head, a female connection head and a loose connection head; the liquid outlet end of the valve body 10 is provided with a second connector 14, and the second connector 14 is one of an external thread connector, an internal thread connector and a movable connector.

Referring to fig. 1, 2, 4 and 5, in some embodiments, the switch assembly 50 includes a stopper 33, a valve cover 51, a valve stem 52, a plug seat 521, a valve flap 53 and a valve cap 54; the limiting part 33 is arranged on the inner wall of the liquid inlet end of the inner cavity 32, the limiting part 33 is formed by extending the inner wall of the inner cavity 32 to the center of the inner cavity 32, and a through hole is formed in the middle of the limiting part 33; the valve cover 51 is in threaded connection with the valve seat 30, a fourth sealing element 19 is arranged between the valve cover and the valve seat to seal a gap between the valve cover and the valve seat, and the third sealing element 19 is a rubber ring or a silica gel ring; of course, in other embodiments, the valve cover 51 and the valve seat 30 may be provided as a single structure; the valve core can be relatively movably arranged on the valve cover 51 along the axial direction of the inner cavity 32, and when the valve core moves away from the valve body, the inner cavity is communicated with the medium flow passage; when the valve core moves to the direction close to the valve body to be abutted against the limiting part, the valve core blocks the inner cavity and the medium flow passage. The case of form more than adopting, the valve core is kept away from the valve body so that inner chamber and medium runner communicate completely, compares in such as ball valve, ceramic case etc. impurity can not be detained on the case, and cleaning effect is good.

The valve core comprises a valve rod 52, a plug seat 521 and a valve clack 53; the valve rod 52 is in threaded connection with the valve cover 51, and one end of the valve rod 52, which is far away from the valve body 10, is also in rotation stopping connection with a valve cap 54; when the bonnet 54 is rotated, the valve rod 52 is driven to move up and down relative to the valve cover 51; the plug seat 521 is formed at one end of the valve rod 52 close to the valve body 10, and the valve clack 53 is sleeved on the plug seat 521; when the bonnet 54 is rotated, the valve stem 52 pushes the valve flap 53 into abutment with the stop 33, thereby isolating the interior chamber 32 from the media flow path 11. Of course, in other embodiments, the movement of the valve stem may be a push-pull type, and the valve stem or bonnet may be snapped into engagement with the bonnet to secure the valve stem in a set position.

Referring to fig. 4, in some embodiments, the valve cap 51 is provided with a movable cavity 511 therein, the valve rod 52 is partially inserted into the movable cavity 511, an annular limiting groove 521 is formed in the valve rod 52, and a second sealing member 55 abutting against the inner wall of the movable cavity 511 is arranged in the limiting groove 521, so as to seal a gap between the valve rod 52 and the valve cap 51 and prevent media leakage.

Referring to fig. 1 and 2, in some embodiments, the control assembly 60 includes a ceramic spool 61 disposed on the valve body and a hand wheel 62 connected to the ceramic spool; the ceramic valve core 61 is the prior art, the structure of the ceramic valve core is not described any more, the liquid inlet end of the ceramic valve core 61 is communicated with the middle cavity 113, the liquid outlet end of the ceramic valve core 61 is communicated with the second channel 112, and the opening and closing of the ceramic valve core 61 are controlled by the hand wheel 62.

Referring to fig. 8, 9, and 11-14, in some embodiments, the second channel is positioned coincident with the centerline of the first channel, suitable for straight-through connection applications.

Referring to fig. 17, in some embodiments, the drainage member includes a plug 18 threadedly engaged with the valve body 10, wherein one end of the filter member 20 is partially inserted into the plug 18 and the other end abuts against the boss, and when the drainage valve needs to be cleaned, the plug 18 is removed to clean the impurities on the filter member.

Referring to fig. 8-10, in some embodiments, the liquid inlet end of the valve body 10 is provided with a first connector 13, and the liquid outlet end of the valve body 10 is provided with a second connector 14; wherein the first connector 13 is provided as a male connector; the second connector 14 comprises an outer connector 15 sleeved at the liquid outlet end of the valve body 10, the outer connector 15 is provided with internal threads, and an inner retaining ring 151 is arranged at one end facing the valve body 10; outer joint 15 and valve body 10 play liquid end and pass through the cooperation of anti-disengaging structure, it is specific, anti-disengaging structure is including seting up in go out the annular groove 152 of liquid end and locating rand 153 in the annular groove 152, rand 153 and interior fender ring 151 cooperation are spacing to outer joint 15 for outer joint 15 can not break away from valve body 10. When the loose joint connects with external pipeline, rotate outer joint 15 and make the internal thread of outer joint 15 and external pipeline spiro union, this connected mode need not to rotate valve body 10, is convenient for install in narrow space department.

Referring to fig. 3, in some embodiments, the first connection joint includes a connection nut 81 and a pipe joint 82, the connection nut 81 is made of stainless steel or brass, and the connection nut 81 is sleeved on the pipe joint 82. The pipe joint 82 is made of PPR pipe, and the inner wall and the outer wall of the pipe joint are smooth surfaces. The pipe joint 82 is provided with a first limiting part, the connecting nut 81 is provided with a second limiting part, the first limiting part is a convex ring 821 formed on the pipe joint 82, the second limiting part is a convex edge 811 formed on the inner wall of the connecting nut 81, and the first limiting part and the second limiting part limit each other, so that the connecting nut 81 cannot be separated from one end of the pipe joint 82. The positioning groove 16 that the play liquid end of valve body 10 was equipped with, the positioning groove 16 for form in annular on the valve body 10 third sealing member 17 has been placed in the middle of the positioning groove 16, third sealing member 17 is rubber circle or silica gel circle, third sealing member 17 part imbed to in the middle of the positioning groove 16, when coupling nut 81 links to each other with valve body 10, coupling 82 with third sealing member 17 looks butt to realize sealed between coupling 82 and the valve body 10.

Referring to fig. 14-16, in some embodiments, the first connector includes a connector core 91, a shrink sleeve 92, and a compression nut 93; in the embodiment, the first connecting head is used for connecting with an aluminum plastic pipe, the connecting core 91 is in a step shape, the outer circumferential surface with a larger diameter is sleeved with a first sealing ring 911, the outer circumferential surface with a smaller diameter is sleeved with a second sealing ring 912, when the connecting core 91 is connected, part of the connecting core 91 is inserted into the liquid inlet end of the valve body 10, the end with a larger outer diameter is attached to the inner wall of the liquid inlet end of the valve body 10, and the end with a smaller outer diameter is inserted into the aluminum plastic pipe to realize connection; the end surfaces of two sides of the shrinkage sleeve 92 are respectively provided with a first inclined pressing surface 921 which is sleeved on the outer circular surface of the aluminum plastic pipe, so that an external pipeline is positioned between the shrinkage sleeve 92 and the connecting core 91, the inner hole wall of the shrinkage sleeve 92 is provided with an extrusion part 922, the extrusion parts 922 are a plurality of convex rings arranged on the inner wall of the shrinkage sleeve, the friction force between the shrinkage sleeve 92 and the aluminum plastic pipe is increased, the aluminum plastic pipe is extruded after the shrinkage sleeve 92 is connected with the aluminum plastic pipe, and the inner wall of the shrinkage sleeve 92 is completely attached to the aluminum plastic pipe to prevent medium leakage; in order to ensure that the shrink sleeve 92 can extrude the aluminum-plastic pipe, the inclined notch 923 is arranged on the circumferential surface of the shrink sleeve 92, and the inclined notch 923 is reduced after the shrink sleeve 92 is extruded, so that the inner diameter of the shrink sleeve 92 is reduced.

The compression nut 93 is sleeved on the shrinkage sleeve 92 and is connected with the liquid inlet end of the valve body 10; the compression nut 93 is provided with a third limiting part, the third limiting part is a convex ring formed on the inner wall of the compression nut 93, a second inclined pressing surface 931 is arranged on one side, facing the shrink sleeve 92, of the convex ring, and the third limiting part limits the end surface of the shrink sleeve 92, so that the shrink sleeve 92 cannot be separated from one end of the compression nut 93.

In-process of gland nut 93 and valve body 10 feed liquor end threaded connection, shrink sleeve 92 one end and valve body 10 feed liquor end butt, the first inclined plane of pressing of the other end and gland nut 93's the second inclined plane 931 butt, shrink sleeve 92 receives the oblique breach 923 of extrusion to diminish to make shrink sleeve 92 internal diameter reduce, extrusion plastic-aluminum pipe, accomplish and realize sealing with being connected of plastic-aluminum pipe.

The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.

Claims

1. A water inlet valve with an instant sewage discharge function is characterized in that: comprises that

2. A fill valve with immediate blowdown as claimed in claim 1, wherein: the filtering structure comprises an intermediate cavity arranged in the valve body and at least one filtering piece partially positioned in the intermediate cavity, and the filtering piece shields the communication port between the intermediate cavity and the second channel.

3. A fill valve with immediate blowdown as claimed in claim 2, wherein: the filter element is provided with an opening through which a medium can pass, and the medium enters the area on one side of the filter element away from the second channel through the opening.

4. A fill valve with immediate blowdown as claimed in claim 2, wherein: the middle cavity comprises a first cavity used for installing the filter piece and a second cavity arranged on the liquid inlet side of the first cavity, and a medium flowing through the control assembly enters the second cavity.

5. The inlet valve with instant sewage function as claimed in claim 4, wherein: and taking a plane perpendicular to the central line of the second channel as a third reference plane, wherein the projection of the wall forming the second chamber on the third reference plane is partially overlapped with the projection of the control component on the third reference plane.

6. A fill valve with immediate blowdown as claimed in claim 3, wherein: the filtering piece is of a tubular filtering net structure, and a boss which is abutted against one end of the filtering piece is arranged between the second cavity and the first cavity.

7. A fill valve with immediate blowdown as claimed in claim 6, wherein: the liquid inlet end of the filter element is sleeved on the boss, the outer wall of the boss is a conical surface, and the outer diameter of the boss is gradually increased in the direction away from the valve seat.

8. A fill valve with immediate blowdown as claimed in claim 2, wherein: and an auxiliary channel is also arranged between the middle cavity and the second channel.

9. A fill valve with immediate blowdown as claimed in claim 22, wherein: and taking a plane passing through the central line of the middle cavity and the central line of the second channel at the same time as a second reference surface, and taking an included angle between the projection of the central line of the middle cavity on the second reference surface and the projection of the central line of the second channel on the second reference surface as beta, wherein the beta is more than or equal to 30 degrees and less than or equal to 90 degrees.

10. A fill valve with immediate blowdown as claimed in claim 1, wherein: the blowdown part comprises a valve seat arranged on the valve body, an inner cavity arranged in the valve seat and communicated with the medium flow channel, a branch pipe arranged on the valve seat and communicated with the inner cavity, and a switch assembly used for controlling the communication between the inner cavity and the medium flow channel.