CN106704678B

CN106704678B - Combined type sewage discharge valve and sewage discharge system

Info

Publication number: CN106704678B
Application number: CN201611188938.6A
Authority: CN
Inventors: 邹江华
Original assignee: Suzhou Alpine Flow Control Co ltd
Current assignee: Suzhou Alpine Flow Control Co ltd
Priority date: 2016-12-20
Filing date: 2016-12-20
Publication date: 2023-04-07
Anticipated expiration: 2036-12-20
Also published as: CN106704678A

Abstract

The invention relates to a combined type sewage discharge valve and a sewage discharge system, and belongs to the field of sewage discharge. Combined type sewage discharge valve includes valve body, midbody, valve gap, floater, valve rod and seal assembly, and the valve body is including setting up the back taper entry in its bottom, and the midbody setting is between valve body and valve gap to the midbody includes the backstop portion that extends to the valve body is inside, and the floater setting is relative in the valve body and with the back taper entry, and the one end of valve rod is connected to the top of floater, and the other end and the seal assembly of valve rod are connected, and seal assembly sets up the exhaust port department at the valve gap. The sewage discharge system comprises a pipeline system and the combined sewage exhaust valve, and the combined sewage exhaust valve is arranged at the highest position of the pipeline system. The invention can exhaust safely, reliably and efficiently, and effectively avoid sewage from overflowing from the exhaust valve.

Description

Combined type sewage discharge valve and sewage discharge system

Technical Field

The invention relates to the field of sewage discharge, in particular to a combined type sewage discharge valve and a sewage discharge system.

Background

At present, the sewage exhaust valve is designed to be of a long body type at home, the flow speed of sewage entering a valve body cannot be effectively reduced through the long body type exhaust valve, and under the extreme condition, the sewage can be leaked, the environmental pollution is caused, and even the casualties of people can be caused. Meanwhile, the pressure sealing difference generated by the ordinary start and stop of the sewage discharge pump causes the water level to rise after the exhaust valve is sealed, so that the sewage contacts the sealing surface, and the sealing is affected. The long exhaust valve is easy to leak under the micro-pressure state. When under high pressure, the sealing structure connected with the floating ball easily cuts the rubber sealing ring of the sealing valve cover, and damages the rubber sealing ring. Moreover, when a large amount of exhaust is performed, the air passing through quickly easily blows up the sealing structure, so that a large amount of subsequent air cannot be continuously exhausted. In the small exhaust process, the top plug is easily broken by the top core, and the service life is short. Finally, the existing long exhaust valve also has the problems that the flow cross section is small, and a large exhaust hole can not completely correspond to the caliber size, so that the exhaust is unsmooth and incomplete.

Disclosure of Invention

The invention aims to provide a composite sewage exhaust valve which can safely, reliably and efficiently exhaust and effectively prevent sewage from overflowing from the exhaust valve.

Another object of the present invention is to provide a sewage discharge system which can discharge sewage safely, reliably and efficiently.

The embodiment of the invention is realized by the following steps:

the utility model provides a combined type sewage discharge valve, its includes valve body, midbody, valve gap, floater, valve rod and seal assembly, and the valve body is including setting up the back taper entry in its bottom, and the midbody setting is between valve body and valve gap to the midbody includes the backstop portion that extends to valve body inside, and the floater setting is relative in the valve body and with the back taper entry, and the one end of valve rod is connected to the top of floater, and the other end and the seal assembly of valve rod are connected, and seal assembly sets up the gas vent department at the valve gap.

In a preferred embodiment of the present invention, the sealing assembly includes a sleeve, the sleeve is suspended at the top opening of the intermediate body and is spaced from the intermediate body, the sleeve includes a bottom wall, a side wall and an exhaust window, the bottom wall has a through hole for the valve rod to pass through, the side wall is connected to the bottom wall, and the exhaust window is opened on the side wall.

In a preferred embodiment of the present invention, the sealing assembly further includes a sealing cover, the sealing cover is disposed in the sleeve and located above the valve rod, the sealing cover includes an arc-shaped cover body and a connecting rod, one end of the connecting rod is connected to the arc-shaped cover body, the other end of the connecting rod passes through the valve cover, and an exhaust gap is formed between the connecting rod and the valve cover.

In a preferred embodiment of the present invention, the arc-shaped cover body includes a convex surface facing the valve cover, and the convex surface is matched with the shape of the exhaust port of the valve cover.

In a preferred embodiment of the present invention, the sealing cover further includes an exhaust hole, the exhaust hole is disposed at a connection position of the arc cover body and the connecting rod, the exhaust hole includes a radial hole and an axial hole communicated with the radial hole, the radial hole is disposed along a radial direction of the connecting rod, and the axial hole is disposed along an axial direction of the connecting rod and penetrates through the arc cover body.

In a preferred embodiment of the present invention, the sealing assembly further comprises a sealing ring, the sealing ring is arranged between the intermediate body and the valve cover, and the sealing ring presses the sleeve to the top opening edge of the intermediate body.

In a preferred embodiment of the present invention, the valve rod includes a rod body and a rod head, the rod head is disposed at an end of the rod body far away from the floating ball, the rod head includes a body and a sealing gasket, a groove is disposed at a top of the body, the sealing gasket is disposed in the groove, and an annular step is formed at an edge of the groove, so that the body protrudes upward relative to the sealing gasket.

In a preferred embodiment of the present invention, the valve body includes a conical outlet disposed at a top portion thereof, and the stopper is disposed at the conical outlet and extends downward, so that the stopper is spaced apart from an inner wall of the valve body.

In a preferred embodiment of the present invention, the combined sewage discharging valve further includes a dust-proof assembly, the dust-proof assembly includes a dust-proof cover, a dust-proof net and a pillar, the pillar is connected to the valve cover, the dust-proof cover is spaced from the valve cover by the pillar, and the dust-proof net is disposed between the valve cover and the dust-proof cover.

A sewage discharge system comprises a pipeline system and the composite sewage discharge valve, wherein the composite sewage discharge valve is arranged at the highest position of the pipeline system.

The embodiment of the invention has the beneficial effects that:

the combined sewage discharge valve and the sewage discharge system provided by the embodiment of the invention comprise a valve body, an intermediate body, a valve cover, a floating ball, a valve rod and a sealing assembly. The valve body is including setting up the back taper entry in its bottom, can effectively slow down the velocity of flow behind sewage entering valve body through the back taper entry, avoids sewage to leak because of the velocity of flow is too high in the valve body, perhaps cuts the seal assembly in the discharge valve. The intermediate body arranged between the valve body and the valve cover can effectively block the impact of high-pressure water flowing into the valve body on the sealing assembly through the stop part extending towards the inside of the valve body, and simultaneously, the impact direction of the high-pressure water is changed, so that sewage is prevented from being flushed to the outside of the exhaust valve. The floater sets up with the back taper entry is relative, can further slow down the velocity of flow of sewage. The sealing assembly is arranged at the air outlet of the valve cover and is positioned at the highest position of an air exhaust flow passage of the whole combined type sewage exhaust valve, and even if a large pressure difference exists in the valve body, the rising sewage cannot reach the position of the sealing assembly.

Therefore, the combined sewage discharge valve and sewage discharge system provided by the embodiment of the invention can effectively slow down the flow velocity of sewage entering the valve body through the valve body with the inverted-cone-shaped inlet, the intermediate body extending downwards in the valve body and the floating ball, and change the flow direction of the sewage in the valve body, thereby effectively avoiding the phenomenon that the sewage rushes out of the valve body and damages a sealing assembly due to overlarge flow velocity and pressure, and further realizing safe, reliable and efficient discharge.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of a composite sewage discharge valve according to an embodiment of the present invention;

FIG. 2 is a sectional view of the composite sewage discharge valve according to the embodiment of the present invention;

FIG. 3 is an enlarged view of the composite sewage discharge valve at position III according to the embodiment of the present invention;

FIG. 4 is an enlarged view of a composite sewage discharge valve at IV according to an embodiment of the present invention;

FIG. 5 is an enlarged view of the composite sewage discharge valve at V according to the embodiment of the present invention;

FIG. 6 is a sectional view showing a partial structure of a combined type sewage discharge valve according to an embodiment of the present invention;

FIG. 7 is a sectional view showing a partial structure of a combined type sewage discharge valve according to an embodiment of the present invention.

In the figure: 100-composite sewage exhaust valve; 110-a valve body; 111-inverted cone inlet; 112-a conical outlet; 113-a tapered wall; 114-an inverted conical wall; 115-drain holes; 116-a sealing plug; 120-intermediates; 121-a stop; 122-a mounting portion; 123-ear plate; 130-a valve cover; 131-an exhaust port; 140-a floating ball; 150-a valve stem; 151-rod body; 152-a club head; 153-body; 154-a gasket; 155-groove; 160-a seal assembly; 161-a cannula; 162-a sealing cover; 163-sealing ring; 164-tube bottom wall; 165-tube sidewall; 166-exhaust window; 167-arc cover; 168-connecting rods; 169-vent hole; 170-a stopper; 171-radial holes; 172-axial bore; 180-a dust-proof assembly; 181-dust cover; 182-struts.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally put in use of products of the present invention, and are only for convenience of description and simplification of description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 and 2, a composite sewage discharging valve 100 according to an embodiment of the present invention is shown in a schematic structural view and a cross-sectional view, and includes a valve body 110, an intermediate body 120, a valve cap 130, a floating ball 140, a valve rod 150, a sealing assembly 160, and a dust-proof assembly 180. The intermediate body 120 is disposed between the valve body 110 and the bonnet 130 and is connected to the valve body 110 and the bonnet 130, respectively. The float ball 140 is disposed in the valve body 110 opposite to the reverse tapered inlet 111 of the valve body 110. One end of the valve stem 150 is connected to the top of the float ball 140, and the other end of the valve stem 150 is connected to the sealing member 160. The sealing assembly 160 is disposed at the discharge port 131 of the bonnet 130. The dust prevention assembly 180 is disposed on the top of the valve cap 130 and spaced apart from the valve cap 130.

Referring to fig. 1 and 2, the bottom and the top of the valve body 110 are respectively substantially cone-shaped, and include an inverted cone-shaped inlet 111 disposed at the bottom and a cone-shaped outlet 112 disposed at the top. The valve body 110 further includes a tapered wall 113 and an inverted tapered wall 114 respectively located at upper and lower portions of the valve body 110, and the inverted tapered inlet 111 and the tapered outlet 112 are respectively defined by the tapered wall 113 and the inverted tapered wall 114. After sewage flows in from the inverted cone inlet 111 of the valve body 110, the size of the inverted cone inlet 111 is continuously increased in the direction along the water flow, so that the flow rate of the sewage is rapidly reduced after the sewage enters the valve body 110, and environmental pollution and casualties caused by the fact that the sewage rushes out of the exhaust valve due to overlarge flow rate in the valve body 110 are avoided. When the air is exhausted, since the size of the tapered outlet 112 is continuously reduced along the flowing direction of the air, it is further beneficial to quickly exhaust the air accumulated in the valve body 110 through the tapered outlet 112, especially when the sewage discharge pump is started, a large amount of air exists in the water pipe, and the air in the water pipe needs to be quickly exhausted. Meanwhile, the inner wall of the valve body 110 corresponding to the conical outlet 112, which is obliquely arranged, can block the high-pressure sewage from impacting the sealing assembly 160 to a certain extent, so as to change the flow direction of the sewage, and further slow down the flow speed of the sewage in the valve body 110.

Referring to fig. 2, the valve body 110 further includes a drainage hole 115 formed on the reverse tapered wall 114 and a sealing plug 116 engaged with the drainage hole 115. The drain hole 115 functions to drain the contaminated water collected in the lower portion of the valve body 110. A mounting hole is provided at the top of the valve body 110 for coupling and fixing between the valve body 110 and the intermediate body 120. In the present embodiment, the valve body 110 is fixed to the intermediate connection as a bolt connection.

Referring to fig. 2 and 6, the middle body 120 is substantially a cylindrical structure, and includes a stopper portion 121, a mounting portion 122 and an ear plate 123. The stopper 121 is connected to the mounting portion 122, and both are coaxial cylinders. The stopper 121 is held in the valve body 110 and extends toward the inside of the valve body 110, that is, the stopper 121 extends in a direction away from the mounting portion 122 in the valve body 110. In the state illustrated in fig. 2, the stopper portion 121 extends downward. A distance is formed between the stopping portion 121 extending downwards and the tapered wall 113 of the valve body 110, so that the stopping portion 121 and the inner wall (specifically, the tapered wall 113) of the valve body 110 are arranged at an interval, sewage in the valve body 110 is blocked between the stopping portion 121 and the valve body 110 by the arrangement, the impact of a high-pressure water head on the sealing assembly 160 on the upper portion of the valve body 110 can be effectively blocked, the sealing assembly 160 is prevented from being damaged by the sewage, and the sealing performance of the exhaust valve is further influenced. Meanwhile, the impact direction of the high-pressure water head is changed due to the existence of the stopping part 121, and therefore the sewage is prevented from rushing to the outside of the valve.

Referring to fig. 2 and fig. 6, the mounting portion 122 is connected to the stopping portion 121 and the ear plate 123, and extends upward in a direction away from the ear plate 123, which is opposite to the extending direction of the stopping portion 121. The mounting portion 122 is substantially cylindrical, and communicates with the stopper portion 121 to form a coaxial cylindrical structure. At the end of the mounting portion 122 extending upward, a boss protruding outward in the circumferential direction of the mounting portion 122 is formed, which is used for mounting and fixing the valve cover 130.

Referring to fig. 2 and 6, the ear plate 123 is disposed outside the stopping portion 121 and the mounting portion 122 and located at a connection position of the stopping portion 121 and the mounting portion 122. The ear plate 123 includes a plurality of mounting holes extending through a surface thereof for securing the central body 120 to the valve body 110 at the tapered outlet 112 to effect connection of the central body 120 to the valve body 110.

In the present embodiment, the stopping portion 121, the mounting portion 122 and the ear plate 123 are integrally formed, which is beneficial to simplify the production and mounting processes of the middle body 120.

Referring to fig. 2 and 7, the valve cover 130 is a disk-shaped structure with an open center, and is engaged with the mounting portion 122 of the middle body 120. An opening provided in the middle of the cap 130 is a gas outlet 131, and the gas outlet 131 is communicated with the middle body 120, so that the gas in the valve body 110 can be discharged from the gas outlet 131 after flowing through the middle body 120.

Referring to fig. 2, the float 140 is substantially cylindrical, and has top and bottom surfaces with arc surfaces protruding outward. In the view shown in fig. 2, the top surface of the floating ball 140 protrudes upward, and the bottom surface of the floating ball 140 protrudes downward. The float ball 140 is disposed inside the valve body 110 and is opposite to the reverse tapered inlet 111 of the valve body 110. After the high-pressure sewage enters from the inverted cone-shaped inlet 111, the floating ball 140 arranged opposite to the inverted cone-shaped inlet 111 can block part of the sewage from directly impacting the valve body 110 to form the sealing assembly 160 in the valve body 110, so that the speed of the sewage entering the valve body 110 is further reduced, and the sewage is prevented from being sprayed out due to overhigh flow speed or overlarge pressure.

Referring to fig. 2 and 6, one end of the valve stem 150 is connected to the top of the float 140, and the other end of the valve stem 150 is connected to the sealing member 160. The valve rod 150 is connected to the floating ball 140, and moves up and down along with the up-and-down floating of the floating ball 140 to contact or separate with the sealing assembly 160, thereby sealing or exhausting the combined sewage exhaust valve 100. Referring to fig. 2 and 3, the valve stem 150 includes a stem 151 and a rod 152, the rod 152 is disposed at an end of the stem 151 away from the ball 140, and is used for pushing the sealing member 160 upward to the exhaust port 131 of the cap 130 to seal the exhaust port 131. The shaft 151 is connected to the club head 152 through a seal assembly 160. Referring to fig. 3, the rod head 152 includes a body 153 and a sealing pad 154. The top of the body 153 is provided with a groove 155, and the sealing gasket 154 is disposed in the groove 155. The edge of the groove 155 forms an annular step so that the body 153 protrudes upward relative to the seal 154. The body 153 protrudes upwards relative to the sealing gasket 154, so that damage to the sealing gasket 154 caused by frequent impact on the sealing assembly 160 during the process of pushing the sealing assembly 160 to move upwards by the valve rod 150 can be avoided, and further, the sealing performance is reduced. The annular step confines the seal 154 within the groove 155 to protect the seal 154.

Referring to fig. 2 and 6, the sealing assembly 160 is disposed at the exhaust port 131 of the valve cover 130, and seals the exhaust port 131 when the combined sewage exhaust valve 100 does not exhaust. The seal assembly 160 includes a sleeve 161, a seal cap 162, and a seal ring 163. A sleeve 161 is suspended at the top opening of the central body 120 and is spaced from the central body 120. A seal cap 162 is disposed within the sleeve 161 and above the valve stem 150. A packing 163 is disposed between the intermediate body 120 and the cap 130, and the packing 163 presses the sleeve 161 to the top opening edge of the intermediate body 120.

Referring to fig. 4 and 6, the sleeve 161 is fixed between the bonnet 130 and the central body 120 together with the packing 163. The sleeve 161 includes a tube bottom wall 164, a tube side wall 165, and an exhaust window 166. The tube bottom wall 164 has a through hole through which the valve stem 150 passes. The bore diameter of the through-hole matches the diameter of the valve stem 150 so that the valve stem 150 can freely move up and down within the through-hole. The valve stem 150 is movably connected to the sleeve 161 through a through hole provided in the tube bottom wall 164. In this embodiment, the outer wall of the tube bottom wall 164 facing the float ball 140 has a downwardly extending stopper tube. The limiting pipe is used for controlling the direction of the valve rod 150 in the up-and-down moving process, and the valve rod 150 is prevented from being inclined, so that the normal work of the valve rod 150 is influenced. The tube side wall 165 is connected to the tube bottom wall 164. And the tube side wall 165 is disposed around the circumferential edge of the tube bottom wall 164. The vent window 166 opens in the tube sidewall 165. As shown in fig. 6, in the present embodiment, the plurality of exhaust windows 166 are uniformly on the tube wall sides, respectively.

Referring to fig. 2 and 6, the sealing cap 162 is disposed in the sleeve 161 and moves up against the exhaust port 131 of the cap 130 by the valve stem 150 to seal the exhaust port 131. When a large amount of air is required to be exhausted, the floating ball 140 sinks due to the drop of the water level, the valve rod 150 is driven to move downwards, the valve rod 150 is further separated from the sealing cover 162, the sealing cover 162 falls to the pipe bottom wall 164 of the sleeve 161 due to the absence of the support of the valve rod 150, at the moment, the air exhaust window 166 on the pipe side wall 165 communicates the middle body 120 with the air exhaust port 131 of the valve cover 130, and finally, a large amount of air is exhausted.

Referring to fig. 5 and 6, the sealing cover 162 includes an arc-shaped cover body 167, a connection rod 168, and an exhaust hole 169. One end of the connection rod 168 is connected with the arc-shaped cover 167, the other end of the connection rod 168 passes through the valve cover 130, and an exhaust gap is formed between the connection rod 168 and the valve cover 130. The exhaust gap cooperates with the exhaust hole 169 for performing a minute amount of exhaust.

The arc-shaped cover 167 includes a convex surface facing the valve cover 130, and the convex surface is matched with the shape of the exhaust port 131 of the valve cover 130. When the sealing cap 162 is pressed against the exhaust port 131 of the bonnet 130 by the valve stem 150, the exhaust port 131 is sealed by the convex surface and the shape fit of the exhaust port 131. The arcuate cover 167 also includes a concave surface facing the stem 150, the concave surface being opposite the convex surface. And the concave surface has a stopper 170 protruding toward the valve stem 150. The stop 170 is coaxial with the connecting rod 168 and both have the same dimensions. The stopper 170 may be understood as a structure formed at a concave surface after the connection bar 168 is extended reversely. The stopper 170 is opposite to the valve stem 150, and the valve stem 150 pushes the sealing cap 162 to move upward by pushing the stopper 170 during the upward movement. Meanwhile, when the valve stem 150 is separated from the sealing cap 162 and the sealing cap 162 drops down to the tube bottom wall 164 of the sleeve 161 by gravity, the sealing cap 162 is positioned to the stem head 152 of the valve stem 150 by the stopper 170. Therefore, it can be understood that the body 153 of the rod head 152 protrudes upwards relative to the sealing pad 154, and the purpose of the protrusion is to avoid the impact of the stopper 170 on the sealing pad 154 when the sealing pad 162 falls, reduce the damage to the sealing pad 154, and ensure the sealing performance of the entire combined type sewage discharge valve 100.

The arc-shaped cover body 167 of the embodiment of the invention is matched with the exhaust port 131 through the arc-shaped convex surface, which has better sealing performance compared with the existing plane sealing cover 162, and when a large amount of exhaust is performed, because the convex surface is in a streamline design, the resistance to gas is reduced, which is more beneficial to the exhaust of gas.

The connecting rod 168 is disposed on the convex surface of the arc-shaped cover 167 and extends upward through the valve cover 130 to be movably connected with the valve cover 130. In this embodiment, the connecting rod 168 mainly plays a role in positioning, and prevents the sealing cover 162 from tilting during the up-and-down movement, thereby affecting the matching degree of the arc-shaped cover 167 and the exhaust port 131.

Referring to fig. 5, an exhaust hole 169 is formed at the connection between the arc cover 167 and the connection rod 168 for performing a minute amount of exhaust in cooperation with the exhaust gap. The exhaust hole 169 includes a radial hole 171 and an axial hole 172 communicating with the radial hole 171. The radial hole 171 is provided in the radial direction of the connecting rod 168, and the axial hole 172 is provided in the axial direction of the connecting rod 168 and penetrates the arc-shaped cover 167. Specifically, as shown in fig. 5, the axial hole 172 penetrates both the arc-shaped cover 167 and the stopper 170 provided on the concave surface of the arc-shaped cover 167. In a state where the combined sewage discharge valve 100 is sealed, a trace amount of gas existing in the valve is discharged through the discharge hole 169.

Referring to fig. 2, the dust-proof assembly 180 includes a dust-proof cover 181, a dust-proof net (not shown), and a support 182. The support 182 is connected to the valve cap 130, the dust cap 181 is spaced apart from the valve cap 130 by the support 182, and the dust screen is disposed between the valve cap 130 and the dust cap 181.

The combined type sewage discharge valve 100 according to the embodiment of the present invention is a combined type valve that can perform a large amount of discharge (short for large discharge), a small amount of discharge (short for micro discharge) and a large amount of suction (short for large suction), that is, suction and discharge, and the operation principle of the combined type sewage discharge valve 100 in different states is described in detail below.

1. Large row

Referring to fig. 7, white arrows indicate water flow direction, and black arrows indicate air flow direction. The state shown in fig. 7 is a large row. In the actual use process, when the sewage discharge pump is started, a large amount of air exists in the water pipe, so that large discharge is needed. According to the working principle of the exhaust valve, when the gas in the water pipe ascends to the highest position of the water pipe along with the water pipe and is collected in the exhaust valve at the highest position of the water pipe, particularly to the embodiment of the invention, the gas is collected in the composite sewage exhaust valve 100. As the gas in the combined sewage discharge valve 100 increases, the water level of the sewage in the valve body 110 decreases under the action of the gas pressure, the floating ball 140 decreases accordingly, and the valve rod 150 is separated from the sealing cover 162. The sealing cover 162 falls to the bottom of the sleeve 161 by its own weight, and the exhaust port 131, which is originally sealed by the sealing cover 162, is opened to communicate with the inside of the combined sewage discharge valve 100, thereby discharging air. The flow direction of the whole gas is shown in fig. 6.

2. Micro-row

Referring to the micro-discharge state shown in fig. 2 and 6, after the initial large discharge is completed, the combined sewage discharge valve 100 generally performs only micro-discharge in the whole sewage discharge process. That is, a trace amount of gas existing in the water pipe is discharged in real time through the combined sewage discharge valve 100. Specifically, as shown in fig. 2, the sealing cap 162 is pushed to the exhaust port 131 by the internal pressure of the combined type sewage discharge valve 100, the exhaust port 131 is sealed, and the valve stem 150 is separated from the sealing cap 162. The trace amount of gas collected under the sealing cap 162 is discharged through the gas discharge hole 169.

3. Large sucker

When the interior of the combined sewage discharge valve 100 is negative pressure, the suction mode is opposite to that of the large discharge. The sealing cap 162 is separated from the valve cap 130 by the atmospheric pressure, and gas enters from the gas outlet 131 through the gas outlet window 166 into the valve body 110.

In summary, the composite sewage discharging valve 100 according to the embodiment of the present invention can effectively reduce the flow velocity of sewage entering the valve body 110 by the design of the valve body 110 having the inverted conical inlet 111. And the impact of the high-pressure water head on the sealing chamber can be effectively blocked through the middle body 120 extending downwards, the impact direction of the high-pressure water head is changed, and the sewage is prevented from being flushed to the outside of the valve. The sleeve 161 is installed between the valve cover 130 and the middle body 120 to block direct impact of high-speed air against the sealing cover 162, and simultaneously the high-speed air is discharged through the window of the sleeve 161 bypassing the upper portion of the sealing cover 162. The sealing assembly 160 is designed at the topmost part of the inner cavity of the combined sewage discharge valve 100, and even if a large pressure difference exists, the rising water level cannot reach the sealing assembly 160, so that the sealing assembly 160 is prevented from being damaged by sewage. In the low pressure state, the sealing cover 162 forms a linear seal with the sealing pad 154, and when the pressure rises, the sealing cover 162 pushes the sealing ring 163 outwards to be directly contacted with the valve cover 130, so that the sealing cover 162 is effectively prevented from cutting the sealing ring 163 in the high pressure state. The large-section exhaust hole 169 for micro-exhaust in the embodiment of the invention can discharge the gas in the combined sewage exhaust valve 100 in real time, and the sealing gasket 154 is not easy to damage. The sectional area of the full watershed is designed to meet the requirement of large gas displacement.

The combined sewage discharge valve 100 of the embodiment of the invention forms an organic whole through the mutual cooperation of the valve body 110, the intermediate body 120, the valve cover 130, the floating ball 140, the valve rod 150 and the sealing assembly 160, thereby effectively avoiding the problem of sewage leakage. The protection device formed by the intermediate body 120 prevents the sewage in the valve body 110 from contacting the sealing assembly 160, and ensures the sealing performance of the combined sewage discharge valve 100. The sleeve 161 according to the embodiment of the present invention is not only used to accommodate the sealing cap 162, but also used as a communicating member for communicating the exhaust port 131 with the interior of the valve body 110 through the exhaust window 166 provided on the side wall 165 of the sleeve 161, and the sleeve 161 accommodates the sealing cap 162 therein, so that the problem that a large amount of air cannot be continuously discharged due to the rapid air blowing up the sealing assembly 160 during large-scale discharge can be avoided.

The sewage discharge system (not shown) of the embodiment of the present invention includes a pipe system and the combined sewage discharge valve 100 of the embodiment of the present invention. The combined sewage discharge valve 100 is disposed at the highest position of the piping system. The pipeline system of the sewage discharge system provided by the embodiment of the invention is arranged and distributed according to actual application places, and the adopted water pipes (pipelines) are carried out according to the industry standard in the field. The connection of the combined sewage discharge valve 100 to the piping system is also conventional in the art.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The combined type sewage exhaust valve is characterized by comprising a valve body, an intermediate body, a valve cover, a floating ball, a valve rod and a sealing assembly, wherein the valve body comprises an inverted cone-shaped inlet arranged at the bottom of the valve body;

the valve rod comprises a rod body and a rod head, the rod head is arranged at the end part, far away from the floating ball, of the rod body, the rod head comprises a body and a sealing gasket, a groove is formed in the top of the body, the sealing gasket is arranged in the groove, and an annular step is formed in the edge of the groove, so that the body protrudes upwards relative to the sealing gasket.

2. The composite sewage discharge valve of claim 1 wherein said sealing assembly comprises a sleeve depending from and spaced from the top opening of said intermediate body, said sleeve comprising a tube bottom wall having a through hole for said valve stem to pass through, a tube side wall connected to said tube bottom wall, and an exhaust window opening in said tube side wall.

3. The composite sewage discharge valve of claim 2 wherein said sealing assembly further comprises a sealing cover disposed within said sleeve and above said valve stem, said sealing cover comprising an arcuate cover and a connecting rod, one end of said connecting rod being connected to said arcuate cover, the other end of said connecting rod passing through said valve cover, and said connecting rod and said valve cover having a discharge gap therebetween.

4. The composite sewage discharge valve of claim 3 wherein said arcuate cover includes a convex surface facing said valve cover, said convex surface being form-fit with said discharge opening of said valve cover.

5. The composite sewage discharge valve of claim 3 wherein the sealing cover further comprises an exhaust hole disposed at a junction of the arc cover and the connecting rod, the exhaust hole comprising a radial hole disposed along a radial direction of the connecting rod and an axial hole communicating with the radial hole, the axial hole disposed along an axial direction of the connecting rod and penetrating through the arc cover.

6. The composite sewage discharge valve of claim 3 wherein said sealing assembly further comprises a sealing ring disposed between said intermediate body and said valve cover and compressing said sleeve to a top opening edge of said intermediate body.

7. The composite sewage discharge valve of claim 1 wherein said valve body includes a tapered outlet disposed at a top portion thereof, said stopper being disposed at said tapered outlet and extending downwardly such that said stopper is spaced from an inner wall of said valve body.

8. The exhaust valve according to any one of claims 1 to 7, further comprising a dust-proof assembly, said dust-proof assembly comprising a dust-proof cover, a dust-proof net and a support, said support being connected to said valve cover, said dust-proof cover being spaced from said valve cover by said support, said dust-proof net being disposed between said valve cover and said dust-proof cover.

9. Sewage discharge system, characterised in that it comprises a pipe system and a combined sewage discharge valve according to any of claims 1-8, said combined sewage discharge valve being arranged at the highest level of said pipe system.