CN210397724U

CN210397724U - Vacuum discharge valve

Info

Publication number: CN210397724U
Application number: CN201921108350.4U
Authority: CN
Inventors: 李仕同; 张睿; 陆彩虹; 孙春霞; 陈纪赛
Original assignee: Cssc Nanjtng Luzhou Environment Protection Equipment Engineering Co ltd
Current assignee: Cssc Nanjtng Luzhou Environment Protection Equipment Engineering Co ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-04-24
Anticipated expiration: 2029-07-16

Abstract

The utility model relates to a vacuum discharge valve, which comprises a valve body, a valve cover, an elastic sealing body and a valve core, wherein the valve body comprises a vertical cavity and a transverse flow passage which are communicated with each other, the valve cover is connected with the valve body and is communicated with the vertical cavity of the valve body to form a vertical valve cavity, and the valve core is arranged in the vertical valve cavity and can move up and down along the vertical valve cavity; an elastic sealing body is arranged at the bottom of the vertical cavity, the elastic sealing body is provided with a vertical flow channel, the vertical flow channel is in a horn mouth shape, the lower end of the valve core is a cone, and the conical surface of the cone can be in sealing fit with the horn mouth of the elastic sealing body; and the valve cover is provided with an air inlet and outlet joint which is selectively connected with an air source and a vacuum source through a control valve. The utility model has the advantages that can effectively discharge the filth in the closestool to unblock, the noise is little, and the fault rate is low.

Description

Vacuum discharge valve

Technical Field

The utility model relates to a vacuum discharge valve, concretely relates to cut off valve for vacuum toilet drainage system for vacuum toilet's blowdown.

Background

Vacuum toilets save approximately 90% of the water in one discharge compared to a normal toilet. The method is greatly beneficial to regions with water resource shortage and relatively independent spaces. The method is widely applied to high-speed rails, ships, airplanes and coach buses. Existing vacuum toilet systems include a toilet bowl for holding waste and having an outlet connected to a vacuum sewer line, with a discharge valve between the toilet bowl outlet and the vacuum sewer line for selectively establishing fluid communication therebetween. The vacuum sewer line is connected to a dirt collection chamber which is under partial vacuum pressure of a vacuum source, such as a suction conveyor. When the discharge valve is opened, the contents of the bowl are transported into the sewer pipe due to the pressure differential between the interior of the bowl and the interior of the sewer pipe.

The more discharge valves used in the vacuum toilet in the current market are rubber diaphragm type vacuum discharge valves, and when the discharge valves are used, dirt is easily accumulated among diaphragms, so that the rubber diaphragms are poor in service durability. As is known, most of the vacuum discharge valves which are mainly used in the market at present are foreign brand products, the price is not good, and most of the vacuum discharge valves are manufactured in China but are similar to foreign technologies.

The existing vacuum discharge valve is sealed by attaching a rubber diaphragm to a valve body in a vacuum state, the rubber diaphragm is always in a stressed state, and the use frequency is high, so that the rubber diaphragm is easy to damage and break. Once the rubber diaphragm breaks, a large amount of air leaks from the system, so that the vacuum cannot be guaranteed, and finally the system fails.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that, overcome prior art's shortcoming, provide a vacuum discharge valve of high performance, low fault rate, low noise and low cost.

In order to solve the technical problem, the utility model provides a vacuum discharge valve, which comprises a valve body, a valve cover, an elastic sealing body and a valve core, wherein the valve body comprises a vertical cavity and a transverse flow passage which are mutually communicated; an elastic sealing body is arranged at the bottom of the vertical cavity, a vertical flow channel is arranged on the elastic sealing body, the vertical flow channel is in a horn mouth shape, the lower end of the valve core is a cone, and the conical surface of the cone can be in sealing fit with the horn mouth of the elastic sealing body; the valve cover is provided with an air inlet and outlet connector, the air inlet and outlet connector is selectively connected with an air source and a vacuum source through a control valve, and the air inlet and outlet connector is connected with the valve cover and the control valve, so that the vertical valve cavity is selectively connected with the air source or the vacuum source through the control valve.

The utility model arranges the valve core in the cavity between the valve cover and the valve body, and makes the valve core move along the axial direction, and the valve body is connected with the inlet pipe, the outlet pipe and the valve cover, the connecting parts of the valve body, the inlet pipe, the valve cover and the valve core are provided with the sealing rings, and the connecting part of the valve body and the outlet pipe is provided with the elastic sealing body, so that the sealing performance of the whole vacuum discharge valve is good; the valve cover is provided with an air inlet and outlet connector (namely a vacuum control port), the valve core moves under the combined action of the pressure of the spring, the pressure in the cavity of the valve cover and the pressure of the vacuum pipeline, namely the opening and closing of the discharge valve are realized through the change of the air pressure in the cavity of the valve cover; the inner cavity of the valve cover and the outer ring of the valve core are cylindrical, a cylinder structure is formed between the inner cavity of the valve cover and the outer ring of the valve core, the valve core moves axially, and meanwhile, a channel on the lower portion of the valve body is large, dirt passing performance is good, so that no dirt remains in the inner portion of the valve body, and the valve body is not prone to being blocked.

In a word, the utility model discloses a vacuum discharge valve can replace rubber diaphragm type vacuum discharge valve completely and be applied to the vacuum toilet to the performance is better, the cost is lower.

Further, a spring is connected between the valve cover and the valve core. The spring is used as a reset function, and the valve is closed mainly by the negative pressure of the outlet pipeline, so that the spring has no influence on the use of the valve after long-term use fatigue.

Furthermore, an inlet pipe is arranged at one side of the valve body and positioned at the transverse flow passage, and the inlet pipe is communicated with the transverse flow passage; the lower end of the valve body is provided with an outlet pipe below the elastic sealing body, and the outlet pipe is communicated with the bell mouth of the elastic sealing body.

Furthermore, a groove with an annular cross section is formed in the inner wall of the lower portion of the valve body, and the elastic sealing body is arranged in the groove.

Furthermore, the control valve is a two-position three-way valve, a first passage of the two-position three-way valve is connected with an air source, and a second passage of the two-position three-way valve is connected with a vacuum source.

Furthermore, one end of the valve cover is of a closed structure, a hole is formed in the closed end of the valve cover, and an air inlet and outlet joint is arranged in the hole; the valve cover is fixedly connected with the valve body in a threaded or bolt connection mode.

Furthermore, the valve gap is hollow cylindrical structure, and valve gap one end is for opening the structure the open one end of valve gap has the level annular border that extends outwards, be equipped with a set of evenly distributed's screw hole on the annular border, with the screw hole cooperation is equipped with the bolt, the bolt passes the screw hole on the annular border of valve gap after-fixing in the up end of valve body.

Furthermore, the inlet pipe and the outlet pipe are both in a straight cylinder shape, one end of the inlet pipe is provided with a first annular connecting plate which extends outwards and is perpendicular to the inlet pipe, the first annular connecting plate is fixedly connected with the side wall of the valve body through a bolt, the upper end of the outlet pipe is provided with a second annular connecting plate which extends outwards horizontally, and the second annular connecting plate is fixedly connected with the lower end face of the valve body through a bolt.

Furthermore, sealing rings are arranged between the first annular connecting plate of the inlet pipe and the side wall of the valve body, between the annular edge of the valve cover and the upper end face of the valve body, on the inner wall of the lower part of the valve cover and on the inner wall of the upper part of the valve body, and the sealing rings are made of rubber.

In the above-mentioned structure, import pipe and valve body, valve body and valve gap, valve gap and case, case and valve body all adopt rubber seal, can not only effectively prevent to reveal, can also effectively reduce the noise that the valve produced when closing. Meanwhile, the contact surface between the valve core and the valve body is sealed by adopting a conical contact surface, so that the sealing area can be effectively increased, and the sealing performance is ensured. When the conical seal is adopted, the channel between the conical surfaces is reduced and the pressure of the channel is increased immediately before the valve body is closed, so that the conical surface cleaning is facilitated, and the seal is effectively ensured.

The vertical valve cavity is a cylindrical cavity, the upper part of the valve core is of a cylindrical structure matched with the cylindrical cavity, and the inner cavity of the valve cover and the upper part of the valve core are in sealing fit to form an air cylinder structure.

The utility model has the advantages that can effectively discharge the filth in the closestool to unblock, the noise is little, and the fault rate is low.

Drawings

Fig. 1 is a schematic view of the closed state of the vacuum discharge valve of the present invention.

Fig. 2 is a schematic view of the open state of the vacuum exhaust valve according to the present invention.

In the figure: 1. the valve comprises an air inlet joint, an air outlet joint, a valve cover, a spring, a valve core, a first sealing ring, a valve body, an inlet pipe, a rubber sealing body, an outlet pipe, a second sealing ring and a two-position three-way valve, wherein the valve core is arranged at 4 degrees, the first sealing ring is arranged at 5 degrees, the valve body is arranged at 6 degrees, the inlet pipe is arranged at 7 degrees.

Detailed Description

Example 1

The structure of the vacuum discharge valve provided by the embodiment is shown in fig. 1, and the vacuum discharge valve comprises a valve body 6, a valve cover 2, a rubber sealing body 8 and a valve core 4, wherein the valve core 4 can be made of ceramics, stainless steel and copper, the valve body 6 comprises a vertical cavity and a transverse flow channel which are mutually communicated, the valve cover 2 and the valve body 6 are connected together in a threaded or bolt connection mode and are communicated with the vertical cavity of the valve body 6 to form a vertical valve cavity, and the valve core 4 is arranged in the vertical valve cavity and can move up and down along the vertical valve cavity. The vertical valve cavity is a cylindrical cavity, the outer ring of the upper part of the valve core 4 is of a cylindrical structure matched with the cylindrical cavity, the inner cavity of the valve cover 2 and the upper part of the valve core 4 are in sealing fit to form a cylinder structure, and the valve core 4 moves axially. A spring 3 is connected between the bonnet 2 and the valve core 4. Be equipped with rubber seal 8 in the bottom of vertical cavity, rubber seal 8 is cylindrical, rubber seal 8 has and runs through its thickness direction, be the vertical runner of horn mouth shape, case 4's lower extreme is the cone, the conical surface of this cone can be sealed cooperation with rubber seal 8's horn mouth, this just makes case 4 and rubber seal 8 adopt the toper contact surface sealed, effectively increase sealing area, guarantee sealing performance, in the twinkling of an eye before valve body 6 closes, the passageway diminishes between the conical surface, passage pressure grow, more be favorable to the conical surface clean, effectively guarantee sealedly. The valve cover 2 is provided with an air inlet and outlet connector 1, the air inlet and outlet connector 1 can be selectively connected with an air source and a vacuum source through a two-position three-way valve 11, a first passage of the two-position three-way valve 11 is connected with the air source (namely atmosphere), and a second passage of the two-position three-way valve 11 is connected with the vacuum source (namely a vacuum pump) through a vacuum pipeline.

Valve gap 2 is hollow cylindrical structure, and valve gap 2 one end is enclosed construction, and the other end is open structure, opens porosely in valve gap 2's closed end, and the hole setting is in one side of valve gap blind end, and downthehole being equipped with is advanced gas connection 1. One of the specific design schemes is as follows: the open end of the valve cover 2 is provided with an annular edge extending outwards horizontally, the annular edge is provided with a plurality of uniformly distributed threaded holes, bolts are arranged in cooperation with the threaded holes, and the bolts penetrate through the threaded holes in the annular edge of the valve cover 2 and then are fixed on the upper end face of the valve body 6. The inner wall of the lower part of the valve body 6 is provided with a groove with an annular cross section, and the rubber sealing body 8 is arranged in the groove. An outlet pipe 9 is arranged below the rubber sealing body 8 at the lower end of the valve body 6, and the outlet pipe 9 is communicated with a bell mouth of the rubber sealing body 11. An inlet pipe 7 is arranged at one side of the valve body 6 at the position of the transverse flow passage, and the inlet pipe 7 is communicated with the transverse flow passage. The inlet pipe 7 and the outlet pipe 9 can be made of plastics, stainless steel or copper, the inlet pipe 7 and the outlet pipe 9 are both in a straight cylinder shape, and the inlet pipe 7 and the outlet pipe 9 are fixedly connected with the valve body 6 in a threaded or bolt connection mode. The specific design scheme is as follows: one end of the inlet pipe 7 is provided with a first annular connecting plate which extends outwards and is vertical to the inlet pipe, the first annular connecting plate is fixedly connected with the side wall of the valve body 6 through a bolt, the upper end of the outlet pipe 9 is provided with a second annular connecting plate which extends outwards horizontally, and the second annular connecting plate is fixedly connected with the lower end face of the valve body 6 through a bolt.

In addition, the lower inner wall of the bonnet 2 and the upper inner wall of the valve body 6 are both provided with a first sealing ring 5. And second sealing rings 10 are arranged on the first annular connecting plate of the inlet pipe 7 on the side wall of the valve body 6 and the annular edge of the valve cover 2 on the upper end face of the valve body 6, and the first sealing ring 5 and the second sealing ring 10 are made of rubber.

In practical use, the vacuum discharge valve can be arranged in any direction, such as vertically, horizontally or obliquely at an included angle with the horizontal plane.

As shown in fig. 1, when the two-position three-way valve 11 is in the left position, the vacuum discharge valve is in the closed state, the air inlet and outlet connector 1 is communicated with the outside atmosphere, the valve core 4 is under the combined action of the pressure of the spring 3, the air pressure and the negative pressure existing in the outlet pipe 9, and the lower end cone of the valve core 4 is tightly pressed on the conical sealing surface of the rubber sealing body 8 to effectively block the transverse flow channel, so as to block the passage between the inlet pipe 7 and the outlet pipe 9. At this time, the valve core 4, the valve body 6 and the valve cover 2 are effectively sealed through the first sealing ring 5 and the second sealing ring 10, so that the valve body 6 is prevented from leaking. Meanwhile, the rubber sealing body 8 is compressed by the valve body 6 and the outlet pipe 9, so that leakage is effectively prevented.

As shown in fig. 2, when the two-position three-way valve 11 is in the right position, the vacuum discharge valve is in an open state, the air inlet and outlet connector 1 is connected with a vacuum source through a vacuum pipeline, so that vacuum is communicated between the valve cover 2 and the valve core 4, the valve core 4 moves upwards to the highest position under the combined action of vacuum negative pressure, the pressure of the spring 3 and the negative pressure existing in the outlet pipe 9, a passage is formed between the inlet pipe 7 and the outlet pipe 9, and the valve is opened.

The utility model is used for the filth of vacuum toilet system discharges, as the partition valve between vacuum line and closestool, not only can solve on the existing market shortcomings such as valve member fault rate is high, the noise is big, the price is expensive, still has advantages such as simple structure, sealing performance are good, the reliability is high, workable, easy assembly, low price, low noise. In summary, the utility model discloses an implementation can replace rubber diaphragm type vacuum discharge valve on the market completely.

In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.

Claims

1. A vacuum discharge valve, characterized in that it comprises a valve body, a valve cover, an elastic sealing body and a valve core, the valve body comprises a vertical cavity and a transverse flow channel that communicate with each other, and the valve cover and the valve body connected together and communicated with the vertical cavity of the valve body to form a vertical valve cavity, the valve core is arranged in the vertical valve cavity and can move up and down along the vertical valve cavity; The bottom is provided with an elastic sealing body, the elastic sealing body has a vertical flow channel, the vertical flow channel is in the shape of a bell mouth, the lower end of the valve core is a cone, and the cone surface of the cone can be connected with the elastic sealing body The bell mouth of the valve cover is sealed and matched; an air inlet and outlet joint is arranged on the valve cover, and the air inlet and outlet joints are selectively connected with the air source and the vacuum source through the control valve.

2 . The vacuum discharge valve according to claim 1 , wherein a spring is connected between the valve cover and the valve core. 3 .

3. A vacuum discharge valve according to claim 1, characterized in that: an inlet pipe is provided on one side of the valve body at the lateral flow passage, and the inlet pipe is communicated with the lateral flow passage; The lower end of the valve body is located below the elastic sealing body and is provided with an outlet pipe, and the outlet pipe is communicated with the bell mouth of the elastic sealing body.

4 . The vacuum discharge valve according to claim 3 , wherein a groove with an annular cross-section is formed on the lower inner wall of the valve body, and the elastic sealing body is arranged in the groove. 5 .

5 . The vacuum discharge valve according to claim 4 , wherein the control valve is a two-position three-way valve, a passage one of the two-position three-way valve is connected to an air source, and the two-position three-way valve is connected to an air source. 6 . The second passage of the valve is connected with the vacuum source.

6 . The vacuum discharge valve according to claim 1 , wherein one end of the valve cover is a closed structure, and a hole is opened at the closed end of the valve cover, and an air inlet and outlet joint is installed in the hole; the The valve cover is fixedly connected to the valve body by means of thread or bolt connection.

7 . The vacuum discharge valve according to claim 6 , wherein the valve cover is a hollow cylindrical structure, and one end of the valve cover is an open structure, and the open end of the valve cover has a horizontal outward direction. 8 . The extended annular edge is provided with a group of evenly distributed threaded holes, and bolts are arranged in cooperation with the threaded holes. The bolts pass through the threaded holes on the annular edge of the valve cover and are fixed to the valve body upper end face.

8 . The vacuum discharge valve according to claim 3 , wherein the inlet pipe and the outlet pipe are in the shape of a straight cylinder, and one end of the inlet pipe has a first annular connecting plate extending outward and perpendicular thereto. 9 . The first annular connecting plate is fixedly connected with the side wall of the valve body through bolts, the upper end of the outlet pipe has a second annular connecting plate extending horizontally outward, and the second annular connecting plate is connected to the valve body through bolts. Fixed connection on the lower end face.

9 . The vacuum discharge valve according to claim 8 , wherein: between the first annular connecting plate of the inlet pipe and the side wall of the valve body, the annular edge of the valve cover and the upper end surface of the valve body There are sealing rings between the valve cover, the lower inner wall of the valve cover and the upper inner wall of the valve body.

10. The vacuum discharge valve according to claim 7, wherein the vertical valve cavity is a cylindrical cavity, the upper part of the valve core is a cylindrical structure matched with the cylindrical cavity, and the The inner cavity of the valve cover and the upper part of the valve core are sealed and matched to form a cylinder structure.