CN213954394U - Vacuum blowoff valve - Google Patents

Abstract

The utility model relates to a vacuum blowoff valve, which comprises a valve body, a main body valve core component arranged inside the valve body for realizing the on-off of the valve body, and an inner valve core component arranged inside the main body valve core component for realizing the on-off sealing inside the valve body; a communicating flow passage is arranged in the valve body, and air is intermittently introduced or vacuum is formed in the valve body; the main valve core assembly is arranged in the valve body and realizes telescopic movement to one side of the communication flow channel through the ventilation state in the valve body; the inner valve core assembly is arranged on one side of the main valve core assembly, which is deviated to the communication flow channel, and is used for realizing the sealing between the end part of the main valve core assembly and the inner wall of the communication flow channel; the utility model discloses a pressure differential drive technique is controlled, and the streamlined design of intercommunication runner makes the circulation resistance minimum, and circulation efficiency is the biggest, and vacuum sewage transport efficiency is the best to adopt the tonifying qi to fall the technique of making an uproar, initiatively fall and make an uproar, adopt the inching initiative to take out the foul smell technique, realize that overall structure's functionality is stronger.

Description

Vacuum blowoff valve

Technical Field

The utility model relates to the technical field of vacuum sewage collection, transportation and treatment, wherein the vacuum sewage collection technology refers to a front-end device or a product for collecting sewage at a sewage source, including but not limited to various kitchens (such as a toilet, a urinal, a shower room, a bathtub and the like) and sanitary products (such as a vegetable washing tank, a dish washing machine and the like); the vacuum sewage conveying technology is related to the technology of efficiently conveying sewage collected by a front-end device or a product to sewage post-treatment equipment, and comprises core components of a vacuum pump station, a sewage collecting tank, an underground (main arrangement form) vacuum conveying pipe network system, a vacuum well, a fault detection and diagnosis system and the like; vacuum sewage treatment technique indicates aftertreatment equipment or device, and the primary function is to concentrate the sewage of collecting and carry out solid-liquid separation and purification, and organic fertilizer can be made into to wherein the solid, and sewage realizes green emission after MBR membrane technology filtration purification, the utility model discloses then a vacuum blowoff valve in the in particular to is applied to vacuum toilet.

Background

In the technical field of vacuum domestic sewage collection, transportation and treatment, vacuum domestic sewage collection is the foremost technology, and the basic realization principle is as follows:

(1) first, the sewage collection inlet line (or blowdown inlet line) in the vacuum sewage delivery system is connected to various sewage front end collection devices, including but not limited to various kitchens (such as toilets, urinals, shower stalls, tubs, etc.) and sanitary products (such as sink basins, dishwashers, etc.);

(2) secondly, the vacuum pump set generates vacuum in the vacuum sewage conveying system;

(3) finally, in the working process of the sewage front-end collecting device, after the vacuum sewage discharge valve is connected, the pressure difference between the external atmospheric pressure and the vacuum value in the pipeline in the vacuum sewage conveying system is acted on the sewage and mixed with air to realize the turbulent conveying of the sewage into the sewage collecting inlet pipeline (or the sewage discharge inlet pipeline).

It is well known that a disadvantage of vacuum sewer systems is the high failure rate compared to gravity sewer systems, whereas vacuum toilet failures are the greater share of the overall vacuum sewer system, whereas in vacuum toilet failures the vacuum sewer valves thereof are most vulnerable.

In recent years, with the development of scientific technology, the following types of vacuum sewer valves are known:

first, a pinch valve: reference is made to core patents FR2366186B1 (1976), US3984080 (1976), US6575425 (2003), CN101225673A (2007), US7832431 (2010), CN101046105B (2011), US 85006 (2013), CN103438237A (2013), CN105089131A (2014), CN108006260A (2017), CN109083236A (2018), CN109027302A (2018), CN108457345A (2018), CN109138114A (2019), CN109973697A (2019);

in the prior art, the pipe clamp valves have no noise reduction function, and in the case of the known vacuum waste discharge valve, the vacuum toilet bowl generates great flushing noise during waste flushing; the vacuum toilet can generate two times of large noise in the use process, namely the vacuum toilet can generate a very large peak noise at the moment when the vacuum blow-down valve is opened to work, and the vacuum toilet can generate another very large peak noise again at the moment when the vacuum blow-down valve is closed; the root cause of these peak noises is due to the real-time throttling of the on-off opening inside the vacuum waste valve, especially when about to open (during the gradual opening of the vacuum waste valve) and when about to close (during the gradual closing of the vacuum waste valve); the known technical solutions (cf. US6128789A, EP0778432B1) use either an airtight toilet lid or a toilet lid with good noise absorption, and also use a vacuum waste valve with active ventilation, while the utility model also effectively uses the known technical experience, i.e. the noise limit can be significantly reduced by reducing the on-off time of the vacuum waste valve; the specific characteristic of this technical solution is that the vacuum sewer valve opening time is controlled below 0.25 seconds, and the vacuum sewer valve closing time is controlled below 0.40 seconds, although this solution is relatively simple and low cost, the effect of this noise reduction technique and method in reducing noise is significant, approximately 15 db lower.

Therefore, in the process of designing the pipe clamp valve type vacuum blowoff valve, in order to ensure the low noise functional requirement, the opening and closing speed of the pipe clamp valve needs to be improved, and meanwhile, a ventilation pipeline needs to be added; moreover, although the technical scheme of forming the vent pipeline on the corrugated diaphragm is a direction worth improving the structure, the structural complexity is increased and the reliability of the pipe clamp valve type vacuum blowoff valve is reduced.

It is emphasized that with the known technology, the flow areas made of corrugated diaphragm are subject to wear and reduce the service life, and the flow areas made of flexible material require a tight coupling of the upper and lower areas in the closed condition, but not an excessive pressure, in order to achieve a reliable closure with a minimum of pressure, while increasing the service life and reducing the maintenance of the pinch valve.

Secondly, cartridge valve: reference to core patents is US2420849 (1943), US5082238 (1990), US5078174 (1990), US5575454 (1994), EP0778432B1 (1995), CN1201057C (1998);

the known technology has the following problems: impurities in the sewage can be adhered to the matching surface of the plunger head and the shell, so that the vacuum blowoff valve has air leakage and water leakage faults; it is well known that the functional characteristics required to be provided when designing a vacuum waste valve are as follows: the structure is simple, the manufacturing cost is low, the maintenance is convenient, the switch action is rapid, the water is prevented, the service life is long, the noise is low, and the like; for the known vacuum blowoff valve, the sewage in the vacuum toilet bowl contains impurities such as waste paper and excrement; therefore, in designing a vacuum sewer valve, it is extremely important to ensure that no impurities can collect in its valve body, since this does not affect the use of the valve function; although the known technology adopts the inverted cone plunger end to improve the sealing performance between the inverted cone plunger end and the matching surface of the shell, due to the nonlinear structural design and the intermittent use frequency of the vacuum blowoff valve, under the non-working state of the vacuum blowoff valve, the region of the lower part of the piston cavity of the vacuum blowoff valve, which is used for storing the retractable inverted cone plunger end, is easy to retain the sewage containing impurities which are impacted, and the impurities hung on the wall surface can flow into the vicinity of the sealing ring and are solidified and corroded into a whole, so that the matching precision of the matching surface of the cone plunger end can be corroded in the long-term on-off process, and the problems of air leakage and water leakage caused by poor sealing, or aging and hardening of a close ring and the like can be caused.

The known technology has the following problems: the vacuum blowoff valve has large energy consumption and low conveying efficiency in the blowoff process; the flow channel adopted by the technologies is nonlinear, in other words, an inclined angle exists between the end surface where the valve body and the conical plunger head are matched and a horizontal plane, and then the traveling route of sewage is not a horizontal streamline, but a streamline with one or even a plurality of times of direction conversion is needed, so that the effective through-flow sectional area of the vacuum sewage discharge valve is reduced; sewage can produce the impact at the in-process of transform direction, not only can produce the noise, can produce the vibration moreover, can influence the sealing performance of relevant product, and what be more serious is that sewage has reduced the velocity of flow of sewage at the in-process that strikes the switching-over by a wide margin, and then has reduced follow-up vacuum sewage conveying system's efficiency and effect.

The known technology has the following problems: the installation is inconvenient, and the occupied space is large; the known technology of the vacuum blowoff valve is a valve seat and a valve chamber which are obliquely arranged, and one of the purposes of the arrangement scheme is to collect condensed water condensed in an upper chamber and a lower chamber of a corrugated membrane assembly in real time and discharge the condensed water smoothly; the corrugated membrane assembly in the vacuum blowoff valve is obliquely arranged relative to the central connecting line of the input pipeline and the output pipeline of the vacuum blowoff valve, so that the manual disassembly and assembly process of the vacuum blowoff valve is inconvenient, the head part occupies a large space, the pressure sensor detection device can be more seriously disassembled and assembled, and the discharge port of condensed water in the lower cavity of the vacuum blowoff valve is at the lowest point of the valve core shell, so that the pipe fitting for disassembly and assembly and the pipe fitting for connection are inconvenient.

Thirdly, a ball valve type: reference is made to the core patent KR 1020160113852A;

such as an electromagnetically driven rotary ball valve, or a pneumatic pressure differential driven rotary ball valve; the ball valve has the advantages that the sealing performance and the resistance of the spherical valve core with the through hole and the inner wall of the shell are good, the rotating resistance of the valve core can be increased, a large-power driving device is needed, the structure is large in size and heavy, the occupied space is large, and the material cost is increased.

Fourthly, the mechanical opening and closing type is inching: reference is made to the core patents 1987-US4713847a 1;

with the known technology, the mechanical type is prone to corrosion and failure in a humid environment due to the large number of parts, and no active condensate draining technology is available.

Therefore, to prior art, on the basis of the basic technical scheme of the cartridge valve that adopts perpendicular extraction to insert, how to realize that the blowdown is efficient, the energy consumption is low, conveying efficiency is high, easy dismounting, faying face are sealed good, noise reduction, initiative are arranged performance requirements such as comdenstion water and are the technical problem that need be waited for urgently to solve, the utility model discloses then developed a vacuum blowoff valve to solve the problem that exists among the prior art, through the retrieval, not discover with the utility model discloses same or similar technical scheme.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is: the utility model provides a vacuum blowoff valve to solve among the prior art be applied to the valve body structure blowdown efficiency and the conveying efficiency of vacuum closestool in low, sealing performance is poor, the during operation noise is great, structural performance is poor and lead to the inconvenient problem of dismouting and condensate water drainage.

The technical scheme of the utility model is that: a vacuum blowoff valve comprises a valve body, a main valve core assembly and an inner valve core assembly, wherein the main valve core assembly is arranged in the valve body and used for realizing the on-off of the valve body, and the inner valve core assembly is arranged in the main valve core assembly and used for realizing the off-sealing of the interior of the valve body; a communicating flow passage is arranged in the valve body, and air is intermittently introduced or vacuum is formed in the valve body; the main valve core assembly is arranged in the valve body and realizes telescopic movement to one side of the communication flow channel through the ventilation state in the valve body; the inner valve core assembly is arranged on one side of the main valve core assembly, which deviates to the communicating flow channel, and is used for realizing sealing between the end part of the main valve core assembly and the inner wall of the communicating flow channel.

Preferably, the valve body comprises an upper shell and a lower shell which are communicated with each other inside, an inner hole for communicating the upper shell with the lower shell is formed in the lower shell, and the communicating flow passage penetrates through the lower shell; the outer wall of the valve body is also provided with a control interface, an air interface and a continuous vacuum interface, wherein the control interface is communicated with the interior and is used for intermittently introducing air or forming vacuum; the main valve core assembly comprises a first compression spring, a main valve core and a plug which are sequentially arranged from top to bottom, the main valve core is inserted and matched in the inner hole, the upper end of the main valve core is provided with a sealing guide plate which is arranged in an integrated structure with the main valve core, and the sealing guide plate divides the inner part of the upper shell into a first upper cavity and a first lower cavity; the first upper chamber and the first lower chamber realize the lifting movement of the main valve core through the change of the ventilation state of the control interface; the first compression spring is arranged in the first upper chamber and is positioned between the upper wall of the upper shell and the upper wall of the sealing guide plate; the plug is fixed on one side of the valve core, which is deviated to the communication flow channel, and the communication flow channel is disconnected by moving to one side of the communication flow channel; the inner valve core assembly comprises an inner valve core, a pair of sliding blocks and a special-shaped rubber sealing ring which are sequentially arranged from top to bottom; the inner valve core divides the interior of the main valve core into a second upper chamber and a second lower chamber, and a negative pressure pipeline extending to the side wall and communicated with the second upper chamber and a vacuum pipeline communicated with the second lower chamber are arranged in the main valve core; the negative pressure pipeline and the vacuum pipeline realize the lifting motion of the inner valve core through the change of pressure difference; the special-shaped rubber sealing ring is embedded in the outer wall of the plug, and is pushed by the inner valve core and the pair of sliding blocks to realize sealing contact with the inner wall of the communicating flow channel.

Preferably, the control interface is arranged on the side wall of the upper shell and communicated with the first upper chamber; the air interface is arranged on the side wall of the lower shell and communicated with the first lower cavity; the vacuum interface is arranged on the side wall of the lower shell and is communicated with the communicating flow channel, one end of the communicating flow channel, which is deviated to the vacuum interface, is a negative pressure flow end, and the other end of the communicating flow channel is a sewage flow end; the vacuum pipeline is positioned at one side deviated to the negative pressure flowing end, and the negative pressure pipeline is positioned at one side deviated to the sewage flowing end.

Preferably, the plug is of a hemispherical structure, the middle part of the upper end face of the plug is provided with a pair of splayed wedge-shaped platforms, and the outer wall of the plug is provided with an annular groove along the vertical circumferential direction; the pair of sliding blocks are arranged on the wedge-shaped table in a contact manner, the special-shaped rubber sealing ring is embedded in the annular groove in a U shape, and the two end parts extend upwards to enable the pair of sliding blocks to be in contact with the inner wall of the end part of the special-shaped rubber sealing ring; the inner valve core is arranged above the pair of sliding blocks, the lower end part of the inner valve core is in contact with the end parts of the sliding blocks, the pair of sliding blocks move along the wedge-shaped table through lifting movement, and then the size of an end opening of the special-shaped rubber sealing ring in a U-shaped structure is changed.

Preferably, the main valve core assembly is internally provided with an air suction pipeline and a one-way valve assembly which is arranged in the air suction pipeline and used for controlling the on-off of the air suction pipeline; the air exhaust pipeline penetrates from top to bottom along the main valve core and the side edge of the plug, and an upper air supply hole and a lower air supply hole which are communicated with the air exhaust pipeline are also formed in the side wall; the side wall of the lower shell is provided with a noise-removing air extraction interface and is used for being communicated with the upper air supplement hole when the valve body is in a closed state and communicated with the lower air supplement hole when the valve body is in an open state; the check valve component is positioned in the air suction pipeline between the upper air supply hole and the lower air supply hole.

Preferably, the check valve assembly comprises a guide sleeve which is fixed in the air suction pipeline in an embedded mode, a guide rod of which the lower end part is matched in the guide sleeve in an inserted mode, and a second compression spring which is sleeved on the outer side of the guide rod; the outer diameter of the upper end part of the guide rod is the same as the inner diameter of the air suction pipeline, a plurality of air guide grooves arranged along the vertical direction are uniformly distributed on the outer wall, vent grooves penetrating through the side wall are formed in the lower end part of the guide rod, and the vent grooves and the inner wall of the guide sleeve are overlapped and staggered through the movement of the guide rod along the air suction direction, so that the on-off of the air suction pipeline is realized; the second compression spring is arranged between the upper end face of the guide sleeve and the upper end part of the guide rod, and when the valve body is in a closed state, the check valve assembly is in a normally open state.

Preferably, a sealing rod which is coaxial with the air suction pipeline is fixed at the upper end of the inner part of the upper shell, the lower end face of the sealing rod is matched in the air suction pipeline in an inserting mode, the one-way valve component is driven to ascend through ascending of the main valve core component, and therefore the lower end of the sealing rod abuts against the upper end of the guide rod to achieve closing of the one-way valve component.

Preferably, the sealing rod and the central axis of the air pumping pipeline are staggered with the central axis of the main valve core assembly.

Compared with the prior art, the utility model has the advantages that:

(1) the utility model adopts the differential pressure driving technology to realize the movement of the main valve core assembly and the inner valve core assembly, thereby realizing the opening and closing of the vacuum blowoff valve and the high-efficiency sealing performance of the vacuum blowoff valve in the closed state; the inside communicating flow channel for sewage discharge adopts a streamline design, the flow resistance is minimum, the flow efficiency is maximum, and the vacuum sewage conveying efficiency is optimal.

(2) When the vacuum blowoff valve is under operating condition, when main part case subassembly is about to open and close, can realize the tonifying qi through the air exhaust pipeline and fall making an uproar, can also carry out the odor extraction at any time simultaneously and handle, when the vacuum blowoff valve is under non-operating condition, can adopt the point to move and take out the odor treatment through the air exhaust pipeline, overall structure has further improved blowdown (sewage and foul smell) efficiency.

(3) The first chamber of going up and the inside comdenstion water of adopting of first chamber are initiatively discharged the technique, and the inside comdenstion water accessible control interface of vacuum blowoff valve and air interface discharge, if the inside discharge of the unable timely effectual casing of following of comdenstion water, long-time back will can't satisfy the inside requirement to operational environment of vacuum blowoff valve to the work efficiency and the life of greatly reduced equipment, therefore effectual comdenstion water discharge technique can effectively satisfy the relative aridity of casing inside.

(4) The main body valve core assembly and the inner valve core assembly are coaxially arranged, simultaneous closing (closing of the communication flow channel) and sealing (sealing of the intersection line of the communication flow channel and the plug is realized by the special-shaped rubber sealing ring) are realized, the air exhaust pipeline and the one-way valve assembly are arranged in a mode of deviating from the central axis of the main body valve core assembly and close to one side of a deviation vacuum interface, a sealing rod used for closing the one-way valve assembly when the main body valve core assembly is in an open state is further arranged at the upper end of the air exhaust pipeline, the sealing rod can avoid the influence of the air exhaust pipeline on the function of the vacuum blowoff valve due to air exhaust and air supplement, an asymmetrical arrangement mode is adopted at the same time, the circumferential rotation of the main body valve core assembly is limited, and an effective positioning effect is achieved.

Drawings

The invention will be further described with reference to the following drawings and examples:

fig. 1 is a schematic view of an appearance structure of a vacuum blowoff valve according to the present invention;

fig. 2 is a top view of a vacuum blowoff valve according to the present invention;

FIG. 3 is a view taken from A to A of a vacuum waste valve according to the present invention;

FIG. 4 is a view from B to B of a vacuum waste valve according to the present invention;

fig. 5 is a partial cross-sectional structural view of a vacuum blowoff valve according to the present invention;

fig. 6 is an exploded view of the main body spool assembly and the inner spool assembly of the present invention (default first compression spring);

fig. 7 is a cross-sectional view of the main body spool assembly and the inner spool assembly of the present invention, perpendicular to the direction in which a pair of sliders are disposed (default first compression spring);

FIG. 8 is a cross-sectional view of the main body spool assembly and the inner spool assembly of the present invention parallel to the direction of the pair of slide blocks (default first compression spring);

fig. 9 is a top view of the main body spool assembly and the inner spool assembly of the present invention (default first compression spring);

FIG. 10 is a C-C view of the main body spool assembly and the inner spool assembly of the present invention;

fig. 11 is a schematic structural view of the check valve assembly of the present invention;

fig. 12 is a schematic structural view of the guide bar of the present invention;

fig. 13 is a pumping circuit diagram of the vacuum blowoff valve according to the present invention in a non-operating state;

fig. 14 is a pumping circuit diagram of the vacuum blowoff valve according to the present invention in an operating state;

fig. 15 is a diagram of a condensed water discharge circuit inside the vacuum waste valve according to the present invention.

Wherein: 1. a valve body;

11. the device comprises an upper shell, a lower shell, a control interface, an air interface, a vacuum interface, a noise-removing air-extracting interface, a communication flow passage, a negative pressure flow end, a negative pressure chamber, a negative;

2. a main body spool assembly;

21. the device comprises a first compression spring, a first sealing guide plate, a first main valve element, a first sealing guide plate 23, a first main valve element 24 and a plug;

241. a wedge-shaped platform 242, an annular groove;

3. an inner spool assembly;

31. the vacuum valve comprises an inner valve core, a sliding block, a special-shaped rubber sealing ring, a first upper cavity, a first lower cavity, a first vacuum pipeline, a first negative pressure pipeline, a second upper cavity, a second vacuum cavity, a second negative pressure cavity, a second vacuum cavity, a second sliding block, a second;

4. an air extraction pipeline;

41. a one-way valve component 42, an upper air supply hole 43, a lower air supply hole 44 and a sealing rod;

411. a guide sleeve 412, a guide rod 413, an air guide groove 414, an air vent groove 415 and a second compression spring.

Detailed Description

The following detailed description is made in conjunction with specific embodiments of the present invention:

as shown in fig. 1-5, a vacuum blowoff valve is mainly applied to a vacuum toilet, and comprises a valve body 1, a main valve core assembly 2 arranged inside the valve body 1 for realizing the on-off of the valve body 1, an inner valve core assembly 3 arranged inside the main valve core assembly 2 for realizing the internal break-off sealing of the valve body 1, and an air suction pipeline 4 and a check valve assembly 41 arranged on the inner side of the main valve core assembly 2; simply, a communicating flow passage 18 is arranged in the valve body 1, and air is intermittently introduced into the valve body 1 or vacuum is formed in the valve body 1; the main valve core assembly 2 is arranged in the valve body 1, and realizes telescopic movement to one side of the communication flow channel 18 through the ventilation state in the valve body 1, so as to open or close the valve body 1; the inner valve core assembly 3 is arranged on one side of the main valve core assembly 2, which is deviated to the communication flow channel 18, and is used for realizing the sealing between the end part of the main valve core assembly 2 and the inner wall of the communication flow channel 18; a check valve assembly 41 is provided inside the suction line 4 for closing or opening the suction line 4, while the suction line 4 is used for exhausting odor inside and around the outside of the vacuum toilet body.

More specifically, the detailed structures of the valve body 1, the main spool assembly 2, the inner spool assembly 3, and the check valve assembly 41 are as follows:

referring to fig. 1 and 4, the valve body 1 includes an upper housing 11 and a lower housing 12 which are communicated with each other inside, the upper housing 11 is a cylindrical structure with an open lower end, the upper end of the lower housing 12 is used for supporting the upper housing 11 and is fixedly connected with the upper housing 11 through a long rod screw, an inner hole 17 communicating the upper housing 11 and the lower housing 12 is arranged in the middle, the central axis of the inner hole 17 is coaxial with the central axis of the upper housing 11, the lower end is provided with a communication flow passage 18 which is arranged in a penetrating manner, and the central axis of the communication flow passage 18 is perpendicular to the central axis of the inner hole 17; the outer wall of the valve body 1 is also provided with a control interface 13 which is communicated with the inside and is used for intermittently introducing air or forming vacuum, an air interface 14, a continuous vacuum interface 15 for forming vacuum and a noise-removing air-extracting interface 16 which is communicated with the vacuum interface 15 to realize odor extraction.

As shown in fig. 4, the main valve core assembly 2 includes a first compression spring 21, a main valve core 23 and a plug 24, which are sequentially arranged from top to bottom, the main valve core 23 is inserted into the inner hole 17, the upper end of the main valve core 23 is provided with a sealing guide plate 22 integrally arranged with the main valve core 23, and the sealing guide plate 22 divides the interior of the upper housing 11 into a first upper chamber 111 and a first lower chamber 112; the first upper chamber 111 and the first lower chamber 112 realize the lifting movement of the main valve core 23 through the change of the ventilation state of the control interface 13; the first compression spring 21 is arranged in the first upper chamber 111 and between the upper wall of the inner side of the upper shell 11 and the upper wall of the sealing guide plate 22; the plug 24 is fixed on one side of the valve core, which is deviated to the communication flow channel 18, and the communication flow channel 18 is disconnected by moving to one side of the communication flow channel 18; as shown in fig. 6, the plug 24 has a hemispherical structure, a pair of wedge-shaped platforms 241 is provided in the middle of the upper end surface, and an annular groove 242 is provided in the outer wall along the vertical circumferential direction.

Referring to fig. 6, 7 and 8, the inner valve core assembly 3 includes an inner valve core 31, a pair of sliders 32 and a profiled rubber seal 33 sequentially arranged from top to bottom; the inner valve element 31 is disposed coaxially with the main valve element 23 and in the middle of the lower end of the main valve element 23, and divides the interior of the main valve element 23 into a second upper chamber 34 and a second lower chamber 35, and as shown in fig. 9 and 10, a negative pressure pipeline 37 extending to the side wall and communicating with the second upper chamber 34 and a vacuum pipeline 36 communicating with the second lower chamber 35 are disposed in the interior of the main valve element 23; the negative pressure pipeline 37 and the vacuum pipeline 36 realize the lifting movement of the inner valve core 31 through the change of pressure difference, and the communication lines inside the negative pressure pipeline 37 and the vacuum pipeline 36 are shown as dotted lines in fig. 10; the pair of sliding blocks 32 are arranged on the wedge-shaped table 241 in a contact manner, the special-shaped rubber sealing ring 33 is embedded in the annular groove 242 in a U shape, and the two end parts extend upwards to enable the pair of sliding blocks 32 to be in contact with the inner wall of the end part of the special-shaped rubber sealing ring 33; the inner valve core 31 is arranged above the pair of sliding blocks 32, the lower end part of the inner valve core is contacted with the end parts of the sliding blocks 32, the pair of sliding blocks 32 move along the wedge-shaped table 241 through lifting movement, and then the size of the end part opening of the U-shaped structure of the special-shaped rubber sealing ring 33 is changed.

The movement of the main spool 23 and the inner spool 31 is related to the ventilation state inside the valve body 1, and therefore the communication state of each port at the outer end of the valve body 1 is as follows: the control interface 13 is arranged on the side wall of the upper shell 11 and communicated with the first upper chamber 111; the air interface 14 is disposed on the sidewall of the lower housing 12 and communicates with the first lower chamber 112; the vacuum connector 15 is disposed on the sidewall of the lower housing 12 and is communicated with the communication channel 18, as shown in fig. 4, one end of the communication channel 18, which is biased to the vacuum connector 15, is a negative pressure flow end 19, and the other end is a sewage flow end 110; the vacuum line 36 is positioned on the side biased toward the negative pressure flow end 19, and the negative pressure line 37 is positioned on the side biased toward the sewage flow end 110; the sewage flow direction inside the communication pipe is from the sewage flow end 110 to the negative pressure flow end 19.

As shown in fig. 5, an air suction pipeline 4 and a check valve assembly 41 arranged inside the air suction pipeline 4 for controlling the on-off of the air suction pipeline 4 are further arranged on one side of the inside of the main valve core assembly 2, which is deviated to the negative pressure flow end 19; as shown in fig. 10, the air pumping pipeline 4 is arranged to penetrate from top to bottom along the side edges of the main valve core 23 and the plug 24, and the side walls are further provided with an upper air replenishing hole 42 and a lower air replenishing hole 43 which are communicated with the air pumping pipeline 4; the noise-removing air extraction port 16 is arranged on the side wall of the lower shell 12 and is used for being communicated with the upper air supplement hole 42 when the valve body 1 is in a closed state and communicated with the lower air supplement hole 43 when the valve body 1 is in an open state; the check valve assembly 41 is positioned in the air suction pipeline 4 between the upper air supplement hole 42 and the lower air supplement hole 43; as shown in fig. 11, the check valve assembly 41 includes a guide sleeve 411 fixed in the suction line 4 in a nesting manner, a guide rod 412 with the lower end portion inserted and fitted in the guide sleeve 411, and a second compression spring 415 sleeved outside the guide rod 412; as shown in fig. 12, the outer diameter of the upper end of the guide rod 412 is the same as the inner diameter of the air suction pipeline 4, a plurality of air guide grooves 413 arranged along the vertical direction are uniformly distributed on the outer wall, a vent groove 414 arranged through the side wall is arranged at the lower end of the guide rod 412, and the vent groove 414 and the inner wall of the guide sleeve 411 are overlapped and staggered by the movement of the guide rod 412 along the air suction direction, so that the air suction pipeline 4 is switched on and off; the second compression spring 415 is arranged between the upper end surface of the guide sleeve 411 and the upper end part of the guide rod 412, as shown in fig. 13, when the valve body 1 is in the closed state, the check valve assembly 41 is in the normally open state, which plays the role of inching and pumping odor, and the pumping path is shown by the broken line in the figure; as shown in fig. 14, when the valve body 1 is in the open state, the check valve assembly 41 is in the closed state through the action of the sealing rod 44, so as to prevent the vacuum port 15 from being communicated with the first lower chamber 112 to cause the valve body 1 to fail, and simultaneously play a role in supplementing air and reducing noise when the main valve core assembly 2 is about to be opened and closed, wherein an air suction path is shown by a dotted line in the figure.

Regarding the structure of the sealing rod 44, it is fixed at the upper end inside the upper housing 11 and is arranged coaxially with the suction pipeline 4, the lower end face of the sealing rod 44 is inserted and fitted in the suction pipeline 4, and the raising of the main body valve core assembly 2 drives the one-way valve assembly 41 to raise, so that the lower end of the sealing rod 44 abuts against the upper end of the guide rod 412 to realize the closing of the one-way valve assembly 41; the sealing rod 44 has two main functions:

firstly, the function of the vacuum blowoff valve is prevented from being influenced by the air extraction pipeline 4 due to air extraction and air supplement; when the main valve core assembly 2 of the vacuum blowoff valve is in a closed state, the main valve core assembly 2 is prevented from losing function because the vacuum interface 15 cannot be communicated with the first upper cavity 111; in the open state of the vacuum waste valve main body spool assembly 2, the vacuum port 15 is prevented from communicating with the first lower chamber 112 to cause the main body spool assembly 2 to fail.

Secondly, the sealing rod 44 is asymmetrically arranged, namely, the sealing rod deviates from the central axis of the main valve core assembly 2, so that the circumferential rotation of the main valve core assembly 2 is limited, and an effective positioning effect is achieved.

The working principle of the utility model is as follows:

(1) opening and closing of the vacuum blowdown valve:

when the vacuum blowoff valve is in a non-working state, the control interface 13 is filled with air, the air pressure in the first upper chamber 111 is the same as that in the first lower chamber 112, the main body valve core assembly 2 is lowered under the action of the first compression spring 21, at the moment, the main body valve core assembly 2 almost divides the interior of the communication flow passage 18 into two parts, so that the pressure of the negative pressure flow end 19 is lowered, the pressure of the sewage flow end 110 is increased, the vacuum pipeline 36 is positioned at one side biased to the negative pressure flow end 19, the negative pressure pipeline 37 is positioned at one side biased to the sewage flow end 110, the vacuum pipeline 36 is communicated with the second lower chamber 35, the negative pressure pipeline 37 is communicated with the second upper chamber 34, so that the pressure in the second lower chamber 35 is lowered, the pressure in the second upper chamber 34 is increased, the inner valve core 31 is lowered, the pair of sliders 32 is pushed to move towards two sides along the wedge-shaped platform 241, and the special-shaped rubber sealing ring 33 is pushed, finally, the sealing of the intersection line of the communication flow passage 18 and the plug 24 is realized, and the closing and the effective sealing of the communication flow passage 18 are realized.

When the vacuum blowoff valve is in a working state, the control interface 13 is vacuumized, the air pressure in the first upper chamber 111 is smaller than the air pressure in the first lower chamber 112, the main valve core assembly 2 overcomes the acting force of the first compression spring 21 to rise, at the moment, the communication flow channel 18 is opened to discharge sewage, the air pressure in the negative pressure pipeline 37 and the air pressure in the vacuum pipeline 36 are the same, the pressure difference between the second upper chamber 34 and the second lower chamber 35 disappears, the inner valve core 31 moves upwards, the pair of sliding blocks 32 retracts, and the special-shaped rubber sealing ring 33 resets to reduce the pressing force.

(2) Odor extraction and air supplement:

when the vacuum blowoff valve is in a non-working state, the upper air supply hole 42 is communicated with the noise-removal air extraction port 16, as shown in fig. 13, at this time, the noise-removal air extraction port 16, the air extraction pipeline 4, the check valve assembly 41 (in an open state) and the negative pressure flow end 19 are communicated, so as to suck the odor inside and around the outside of the vacuum toilet into the communication flow passage 18, and play a role of inching and extracting the odor.

When the vacuum blowoff valve is in the working state, the lower air supplement hole 43 is communicated with the noise-removing air extraction port 16, as shown in fig. 14, at this time, the noise-removing air extraction port, the lower end of the air extraction pipeline 4 and the negative pressure flow end 19 are communicated, so that the odor inside and around the outside of the vacuum toilet can be sucked into the communication flow passage 18, the effect of extracting the odor at any time can be achieved, and meanwhile, the effects of air supplement and noise reduction can be achieved when the main valve core assembly 2 is about to be opened and closed.

(3) Condensed water discharge inside the upper case 11:

as shown in fig. 15, the condensed water inside the first upper chamber 111 is discharged through the control port 13, and the condensed water inside the first lower chamber 112 is discharged through the air port 14, wherein the discharge route of the condensed water is shown by the dotted line in the figure.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. It is obvious to a person skilled in the art that the invention is not limited to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention, and that the embodiments are therefore to be considered in all respects as exemplary and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (8)

1. A vacuum blowoff valve is characterized in that: the valve comprises a valve body, a main valve core assembly and an inner valve core assembly, wherein the main valve core assembly is arranged in the valve body and used for realizing the on-off of the valve body, and the inner valve core assembly is arranged in the main valve core assembly and used for realizing the off-sealing of the interior of the valve body; a communicating flow passage is arranged in the valve body, and air is intermittently introduced or vacuum is formed in the valve body; the main valve core assembly is arranged in the valve body and realizes telescopic movement to one side of the communication flow channel through the ventilation state in the valve body; the inner valve core assembly is arranged on one side of the main valve core assembly, which deviates to the communicating flow channel, and is used for realizing sealing between the end part of the main valve core assembly and the inner wall of the communicating flow channel.

2. A vacuum sewer valve according to claim 1, characterized in that: the valve body comprises an upper shell and a lower shell which are communicated with each other inside, an inner hole for communicating the upper shell and the lower shell is formed in the lower shell, and the communicating flow passage penetrates through the lower shell; the outer wall of the valve body is also provided with a control interface, an air interface and a continuous vacuum interface, wherein the control interface is communicated with the interior and is used for intermittently introducing air or forming vacuum; the main valve core assembly comprises a first compression spring, a main valve core and a plug which are sequentially arranged from top to bottom, the main valve core is inserted and matched in the inner hole, the upper end of the main valve core is provided with a sealing guide plate which is arranged in an integrated structure with the main valve core, and the sealing guide plate divides the inner part of the upper shell into a first upper cavity and a first lower cavity; the first upper chamber and the first lower chamber realize the lifting movement of the main valve core through the change of the ventilation state of the control interface; the first compression spring is arranged in the first upper chamber and is positioned between the upper wall of the upper shell and the upper wall of the sealing guide plate; the plug is fixed on one side of the valve core, which is deviated to the communication flow channel, and the communication flow channel is disconnected by moving to one side of the communication flow channel; the inner valve core assembly comprises an inner valve core, a pair of sliding blocks and a special-shaped rubber sealing ring which are sequentially arranged from top to bottom; the inner valve core divides the interior of the main valve core into a second upper chamber and a second lower chamber, and a negative pressure pipeline extending to the side wall and communicated with the second upper chamber and a vacuum pipeline communicated with the second lower chamber are arranged in the main valve core; the negative pressure pipeline and the vacuum pipeline realize the lifting motion of the inner valve core through the change of pressure difference; the special-shaped rubber sealing ring is embedded in the outer wall of the plug, and is pushed by the inner valve core and the pair of sliding blocks to realize sealing contact with the inner wall of the communicating flow channel.

3. A vacuum sewer valve according to claim 2, characterized in that: the control interface is arranged on the side wall of the upper shell and communicated with the first upper chamber; the air interface is arranged on the side wall of the lower shell and communicated with the first lower cavity; the vacuum interface is arranged on the side wall of the lower shell and is communicated with the communicating flow channel, one end of the communicating flow channel, which is deviated to the vacuum interface, is a negative pressure flow end, and the other end of the communicating flow channel is a sewage flow end; the vacuum pipeline is positioned at one side deviated to the negative pressure flowing end, and the negative pressure pipeline is positioned at one side deviated to the sewage flowing end.

4. A vacuum sewer valve according to claim 2, characterized in that: the plug is of a hemispherical structure, the middle part of the upper end face of the plug is provided with a pair of splayed wedge-shaped platforms, and the outer wall of the plug is provided with an annular groove along the vertical circumferential direction; the pair of sliding blocks are arranged on the wedge-shaped table in a contact manner, the special-shaped rubber sealing ring is embedded in the annular groove in a U shape, and the two end parts extend upwards to enable the pair of sliding blocks to be in contact with the inner wall of the end part of the special-shaped rubber sealing ring; the inner valve core is arranged above the pair of sliding blocks, the lower end part of the inner valve core is in contact with the end parts of the sliding blocks, the pair of sliding blocks move along the wedge-shaped table through lifting movement, and then the size of an end opening of the special-shaped rubber sealing ring in a U-shaped structure is changed.

5. A vacuum sewer valve according to claim 4, characterized in that: the main valve core assembly is internally provided with an air suction pipeline and a one-way valve assembly which is arranged in the air suction pipeline and used for controlling the on-off of the air suction pipeline; the air exhaust pipeline penetrates from top to bottom along the main valve core and the side edge of the plug, and an upper air supply hole and a lower air supply hole which are communicated with the air exhaust pipeline are also formed in the side wall; the side wall of the lower shell is provided with a noise-removing air extraction interface and is used for being communicated with the upper air supplement hole when the valve body is in a closed state and communicated with the lower air supplement hole when the valve body is in an open state; the check valve component is positioned in the air suction pipeline between the upper air supply hole and the lower air supply hole.

6. A vacuum sewer valve according to claim 5, characterized in that: the check valve assembly comprises a guide sleeve which is fixed in the air suction pipeline in an embedded mode, a guide rod of which the lower end part is matched in the guide sleeve in an inserted mode, and a second compression spring which is sleeved on the outer side of the guide rod; the outer diameter of the upper end part of the guide rod is the same as the inner diameter of the air suction pipeline, a plurality of air guide grooves arranged along the vertical direction are uniformly distributed on the outer wall, vent grooves penetrating through the side wall are formed in the lower end part of the guide rod, and the vent grooves and the inner wall of the guide sleeve are overlapped and staggered through the movement of the guide rod along the air suction direction, so that the on-off of the air suction pipeline is realized; the second compression spring is arranged between the upper end face of the guide sleeve and the upper end part of the guide rod, and when the valve body is in a closed state, the check valve assembly is in a normally open state.

7. A vacuum sewer valve according to claim 6, characterized in that: the upper end of the inner part of the upper shell is fixedly provided with a sealing rod which is coaxial with the air suction pipeline, the lower end face of the sealing rod is in plug fit in the air suction pipeline, and the one-way valve component is driven to ascend through the ascending of the main valve core component, so that the lower end of the sealing rod is propped against the upper end of the guide rod to close the one-way valve component.

8. A vacuum sewer valve according to claim 7, characterized in that: the sealing rod and the central axis of the air suction pipeline are arranged in a staggered mode in the direction of the central axis of the main valve core assembly.

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