CN111795186B

CN111795186B - Automatic exhaust device for methane tank

Info

Publication number: CN111795186B
Application number: CN202010644620.4A
Authority: CN
Inventors: 林勇
Original assignee: Guangxi Liuzhou Zhengxiang Environmental Protection Technology Development Co ltd
Current assignee: Guangxi Liuzhou Zhengxiang Environmental Protection Technology Development Co ltd
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2022-02-11
Anticipated expiration: 2040-07-07
Also published as: CN111795186A

Abstract

The invention discloses an automatic exhaust device of a methane tank, which comprises an exhaust unit, a valve body, a piston, a sealing seat, an exhaust plate, a first air duct and a cover plate, wherein the piston is positioned in the valve body; the connecting unit comprises an exhaust pipe connected with the sealing seat, a second air duct connected with the piston and an external connecting pipe connected with the exhaust plate, and the exhaust pipe is arranged on a top plate of the methane tank and communicated with the interior of the methane tank; the exhaust unit can be automatically opened or closed without manual intervention, namely, the exhaust unit is automatically opened when exhausting, and is automatically closed when no methane exists, and the exhaust unit can be adjusted to be in a normally open state to exhaust methane.

Description

Automatic exhaust device for methane tank

Technical Field

The invention relates to the field of methane tanks, in particular to an automatic exhaust device for a methane tank.

Background

The methane is a combustible gas produced by organic substances through microbial fermentation under the conditions of certain temperature, humidity and pH value in an anaerobic environment. This gas is called biogas because it is originally found in swamps, lakes, ponds. With the development of the Chinese biogas science and technology and the popularization of rural household biogas, the household biogas digester is provided with a fixed arch cover hydraulic pressure type pool, a large uncovering hydraulic pressure type pool, a hanging pipe type hydraulic pressure type pool, a curved flow distribution hydraulic pressure type pool, a top return water hydraulic pressure type pool, a separation floating cover type pool, a semi-plastic type pool, an all-plastic type pool and a tank type pool according to local use requirements, air temperature, geology and other conditions. The methane tank has various forms, but the structure of the vent hole is single, and the methane tank cannot be automatically opened or closed according to the methane quantity in the methane tank, or unnecessary safety accidents are caused by forgetting to open the methane vent hole.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments, and in this section as well as in the abstract and the title of the invention of this application some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made keeping in mind the above problems occurring in the prior art and/or the problems occurring in the prior art.

Therefore, the invention aims to solve the technical problem that the structure of the vent hole of the methane tank is single, and the opening and closing state can not be automatically adjusted according to the methane quantity in the methane tank.

In order to solve the technical problems, the invention provides the following technical scheme: an automatic exhaust device of a methane tank comprises an exhaust unit, a valve body, a piston, a sealing seat, an exhaust plate, a first air duct and a cover plate, wherein the piston is positioned in the valve body; the connecting unit comprises an exhaust pipe connected with the sealing seat, a second air duct connected with the piston and an external connecting pipe connected with the exhaust plate, and the exhaust pipe is arranged on a top plate of the methane tank and communicated with the interior of the methane tank.

As a preferred scheme of the automatic exhaust device for the methane tank, the invention comprises the following steps: the piston is positioned in the valve body and divides the valve body into a first chamber and a second chamber, a connecting hole is formed in the center of the piston, the first air duct is divided into a first end and a second end, the first end is a hollow cylinder and is connected with the connecting hole, the second end penetrates through the exhaust plate and is connected with the cover plate, and a blocking plate is arranged at the second end; the exhaust plate is provided with a plurality of exhaust holes, the cover plate can cover the exhaust holes, notches communicated with the first cavity are formed in the pipe wall of the first air guide pipe, and air in the first cavity flows to the outer connecting pipe through the exhaust holes.

As a preferred scheme of the automatic exhaust device for the methane tank, the invention comprises the following steps: the second air duct is a hollow cylinder, one end of the second air duct is connected with the connecting hole, a sealing hole is formed in the sealing seat, and the second air duct penetrates through the sealing hole and extends into the methane tank.

As a preferred scheme of the automatic exhaust device for the methane tank, the invention comprises the following steps: still include first elastic component, first elastic component is located in the first cavity, the one end of first elastic component with the air discharge plate is connected, and the other end is contradicted on the piston terminal surface.

As a preferred scheme of the automatic exhaust device for the methane tank, the invention comprises the following steps: a first sealing groove is formed in the cylindrical surface of the piston, and a first sealing ring is arranged between the first sealing groove and the inner wall of the valve body; and a second sealing groove is arranged in the sealing hole, and a second sealing ring is arranged between the second sealing groove and the second air duct.

As a preferred scheme of the automatic exhaust device for the methane tank, the invention comprises the following steps: a diversion hole is formed in the piston, a second elastic piece is connected to one end, close to the sealing seat, of the diversion hole, a pressing plate is connected to one end, far away from the sealing seat, of the diversion hole, a limiting hole is formed in the position, corresponding to the diversion hole, of the pressing plate, and a round ball is arranged between the limiting hole and the second elastic piece; the diameter of the ball is larger than that of the limiting hole and smaller than that of the diversion hole, and gas in the first chamber flows to the second chamber through the diversion hole; the piston is further provided with a backflow hole, and the diameter of the backflow hole is smaller than that of the limiting hole.

As a preferred scheme of the automatic exhaust device for the methane tank, the invention comprises the following steps: the lifting device is characterized by further comprising a lifting piece located inside the methane tank, the lifting piece is divided into a lifting plate and a lifting bulge located at the center of the lifting plate, a sliding rod is connected to the outer side of the lifting plate, and the sliding rod penetrates through a top plate of the methane tank.

As a preferred scheme of the automatic exhaust device for the methane tank, the invention comprises the following steps: a sliding hole is formed in the top plate of the methane tank, a third sealing groove is formed in the sliding hole, and a third sealing ring is arranged between the third sealing groove and the sliding rod.

As a preferred scheme of the automatic exhaust device for the methane tank, the invention comprises the following steps: a third elastic piece is sleeved on the sliding rod, one end of the third elastic piece is abutted against the top plate of the methane tank, and the other end of the third elastic piece is connected with the lifting plate; the part of the sliding rod, which is positioned on the top plate of the methane tank, is provided with a limiting column along the radial direction.

As a preferred scheme of the automatic exhaust device for the methane tank, the invention comprises the following steps: still including rotating the piece, rotate the piece for the ring form and with the coaxial setting of blast pipe, rotate the piece with a terminal surface of methane-generating pit roof contact is provided with the arc wall, slide bar one end inserts extremely in the arc wall, it still runs through to be provided with the spacing groove by inboard side to the lateral surface to rotate the piece, spacing post both ends stretch into in the spacing groove, and follow the trend of spacing groove slides, the spacing groove is divided into promotion groove and constant head tank, promote the groove and include low level end and high-order end again, the line at low level end and high-order end center with contained angle between the methane-generating pit roof is the acute angle, the distance of low level end to methane-generating pit roof is less than the distance of high-order end to methane-generating pit roof, the high-order end with the constant head tank is connected.

The invention has the beneficial effects that: according to the methane amount generated in the methane tank, the exhaust unit can be automatically opened or closed without manual intervention, namely, the exhaust unit is automatically opened when exhausting, and is automatically closed when no methane exists, and the exhaust unit can be adjusted to be in a normally open state to exhaust methane.

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 description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

FIG. 1 is a schematic view of an exhaust unit of an automatic exhaust device for a biogas digester according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of an exhaust unit and a connection unit in the automatic exhaust apparatus for a biogas digester according to an embodiment of the present invention;

FIG. 3 is a schematic view of a state structure of the automatic exhaust device for a biogas digester according to an embodiment of the present invention when no biogas is discharged;

FIG. 4 is a schematic view of the methane discharging structure of the automatic methane tank venting device according to the embodiment of the present invention;

FIG. 5 is a schematic structural view of an embodiment of the automatic exhaust apparatus for a biogas digester according to the present invention, after the biogas is exhausted, the automatic exhaust apparatus is reset;

FIG. 6 is a schematic structural view of a lifting member in the automatic exhaust device of a methane tank according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of a rotating member in the automatic exhaust apparatus for a biogas digester according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of the automatic exhaust apparatus for a biogas digester according to an embodiment of the present invention, wherein the lifting member is not in contact with the connecting unit;

fig. 9 is a schematic structural view of a lifting member abutting against a connection unit in an automatic exhaust device for a biogas digester according to an embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Next, the present invention will be described in detail with reference to the drawings, wherein the cross-sectional views illustrating the structure of the device are not enlarged partially according to the general scale for convenience of illustration when describing the embodiments of the present invention, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 5, the present embodiment provides an automatic exhaust device for a biogas generating tank, which can automatically exhaust biogas when the amount of biogas generated in the biogas generating tank is too large, and automatically close when the amount of biogas is too small. Comprises an exhaust unit 100 and a connecting unit 200; the specific exhaust unit 100 comprises a valve body 101, a piston 102 positioned in the valve body 101, a sealing seat 103 connected with one end of the valve body 101, an exhaust plate 104 connected with the other end of the valve body 101, a first air duct 105 connected with the piston 102, and a cover plate 106 connected with the first air duct 105; the valve body 101 is in a cylindrical shape and can be connected with an original exhaust port of a methane tank and an external methane pipeline, the piston 102 can slide on the valve body 101 along the axial direction of the valve body 101, the sealing seat 103 and the exhaust plate 104 are connected at two ends of the valve body 101, the cover plate 106 can open and seal the communication between the valve body 101 and the outside, namely, a hole on the exhaust plate 104 can be sealed, and the process is mainly determined by the moving position of the piston 102 in the valve body 101.

Further, the connection unit 200 includes an exhaust pipe 201 connected to the sealing seat 103, a second air duct 202 connected to the piston 102, and an external connection pipe 203 connected to the exhaust plate 104, the exhaust pipe 201 is installed on a top plate 204 of the methane tank and is communicated with the interior of the methane tank to directly exhaust methane generated in the methane tank, in this embodiment, the exhaust pipe 201 is connected to the valve body 101, and the sealing seat 103 is installed between the exhaust pipe 201 and the valve body 101, the installation manner is threaded, the second air duct 202 plays a role of transmitting methane, the methane in the methane tank is transmitted to the valve body 101 through the second air duct 202, and then is transmitted to the external connection pipe 203 by the exhaust plate 104 for processing, further, the piston 102 is located in the valve body 101 to divide the valve body 101 into a first chamber M1 and a second chamber M2, wherein the first chamber M1 is a portion between the piston 102 and the exhaust plate 104, the second chamber M2 is a part between the piston 102 and the sealing seat 103, a connecting hole 102a is arranged at the center of the piston 102, the connecting hole 102a penetrates through two ends of the piston 102, and the connecting hole 102a is used for connecting a channel of the first air duct 105 and the second air duct 202 and transmitting biogas; specifically, in this embodiment, the first air duct 105 is divided into a first end 105a and a second end 105b, the first end 105a is a hollow cylinder and is connected with the connection hole 102a, the second end 105b passes through the exhaust plate 104 and is connected with the cover plate 106, the connection mode adopts threaded connection and sealing treatment, and the second end 105b is provided with a blocking plate 105c to prevent the biogas from being directly discharged from the second end 105 b; the exhaust plate 104 is provided with a plurality of exhaust holes 104a, when the cover plate 106 can cover the exhaust holes 104a, the first chamber M1 and the second chamber M2 are in a sealed state, when the piston moves towards the exhaust plate 104, the cover plate 106 allows the exhaust holes 104a to be through by the exhaust plate 104, at this time, the gas in the first chamber M1 can be transmitted outwards, wherein, the pipe wall of the first air duct 105 is provided with a notch 105d communicated with the first chamber M1, namely, the marsh gas generated in the marsh gas pool sequentially passes through the second air duct 202, the connecting hole 102a on the piston 102, the first air duct 105 and the notch 105d to the first chamber M1, then is discharged to the exhaust plate 104 by the first chamber M1, and is discharged to the external pipe 203 by the exhaust holes 104a for processing.

Furthermore, the second air duct 202 is a hollow cylinder for conveying biogas, one end of the second air duct 202 is connected with the connecting hole 102a in a threaded manner, the sealing seat 103 is provided with a sealing hole 103a, the second air duct 202 passes through the sealing hole 103a and extends into the biogas digester, the second air duct 202 can slide along the axial direction of the sealing hole 103a, the exhaust unit 100 further comprises a first elastic member 107, the first elastic member 107 is a spring, the first elastic member 107 is located in the first chamber M1, one end of the first elastic member 107 is connected with the exhaust plate 104, the other end of the first elastic member 107 abuts against the end surface of the piston 102, the tension of the first elastic member 107 enables the piston 102 to be far away from the exhaust plate 104, because the cover plate 106 is connected with the piston 102 through the first air duct 105, the cover plate 106 tightly covers the exhaust plate 104 under the elastic force of the first elastic member 107 to block the exhaust hole 104a, only when the pressure of the biogas in the biogas tank on the cover plate 106 is greater than the pressure of the first elastic element 107 on the piston 102, the piston 102 can move towards the exhaust plate 104, so that the cover plate 106 is separated from the exhaust hole 104a, and the biogas can be exhausted, and similarly, when the biogas in the biogas tank is insufficient, the pressure on the cover plate 106 is not enough to lift the cover plate 106, and the valve body is in a closed state at the moment.

Preferably, a first seal groove 102b is formed on the cylindrical surface of the piston 102, and a first seal ring 108 is arranged between the first seal groove 102b and the inner wall of the valve body 101; a second sealing groove 103b is arranged in the sealing hole 103a, a second sealing ring 109 is arranged between the second sealing groove 103b and the second air duct 202, and the first sealing ring 108 and the second sealing ring 109 are used for lubrication and sealing.

Furthermore, the piston 102 is provided with a diversion hole 102c, the diversion hole 102c enables the gas in the first chamber M1 to flow to the second chamber M2, when the biogas flows into the second chamber M2, and simultaneously, a pushing force is applied to the piston 102 to separate the cover plate 106 from the exhaust plate 104; specifically, one end of the diversion hole 102c close to the sealing seat 103 is connected with a second elastic member 102d, the second elastic member 102d uses a spring, one end of the diversion hole 102c far from the sealing seat 103 is connected with a pressure plate 110, a position on the pressure plate 110 corresponding to the diversion hole 102c is provided with a limiting hole 110a, and a ball 111 is arranged between the limiting hole 110a and the second elastic member 102 d; the diameter of the spherical ball 111 is larger than the diameter of the limiting hole 110a and smaller than the diameter of the diversion hole 102c, and the gas in the first chamber M1 flows to the second chamber M2 through the diversion hole 102 c; the elastic force of the second elastic piece 102d enables the round ball 111 to block the limiting hole 110a, only when the pressure of the gas in the first chamber M1 on the round ball 111 is greater than the elastic force of the spring, the round ball 111 is separated from the limiting hole 110a, at the moment, the biogas in the first chamber M1 flows to the second chamber M2 through the diversion hole 102c, the diversion hole 102c forms a one-way valve structure, and the biogas in the second chamber M2 cannot flow to the first chamber M1 through the diversion hole 102 c; further, the biogas in the second chamber M2 needs to be discharged, and the discharge speed cannot be too fast, and the biogas needs to be slowly discharged to the first chamber M1, so the piston 102 is further provided with a backflow hole 102e, and the diameter of the backflow hole 102e is smaller than that of the limiting hole 110a, so that after the biogas in the biogas pool is discharged, the biogas in the second chamber M2 can only be discharged to the first chamber M1 through the backflow hole 102e, and the diameter of the backflow hole 102e is smaller than that of the limiting hole 110a, so the backflow speed of the biogas is smaller than the speed when the biogas enters the second chamber M2, and a slow resetting process is formed.

The implementation principle of the embodiment is as follows: in the process of generating the biogas by the reaction of the biogas digester, the exhaust mode in the prior art is simple, whether the biogas is exhausted or not is controlled by a simple valve, and manual operation is needed, but in the invention, the exhaust unit 100 is automatically opened once the biogas in the biogas digester reaches the standard of being capable of being discharged, and when the biogas in the biogas digester is less, the exhaust unit 100 is closed. Specifically, in an initial state, the biogas amount in the biogas digester is set to be small, and the biogas passes through the second gas duct 202, the connecting hole 102a on the piston 102, the first gas duct 105 and the notch 105d on the first gas duct 105 until the biogas reaches the inside of the first chamber M1 in sequence, but the pressure of the biogas on the cover plate 106 is not enough at this time, so that the exhaust unit 100 is in a closed state, when the biogas amount in the biogas digester is enough and needs to be exhausted, the pressure of the biogas in the first chamber M1 on the cover plate 106 is greater than the pressure of the first elastic element 107 on the piston 102, so that the piston 102 moves towards the exhaust plate 104, i.e. the cover plate 106 moves away from the exhaust plate 104, so that the exhaust hole 104a is used for exhausting the biogas from the exhaust hole 104a to the external connecting pipe 203, and at the same time, the pressure of a small part of the biogas on the through ball 111 is greater than the elastic force of the spring, so that the biogas enters the second chamber M2 through the diversion hole 102c, the piston 102 is pushed, the volume of the second chamber M2 is slowly increased, the volume of the first chamber M1 is slowly reduced until most of the biogas in the biogas digester is discharged, at the moment, the pressure of the first chamber M1 on the cover plate 106 is insufficient, the cover plate 106 slowly falls back, but part of the biogas in the second chamber M2 exists and can only flow back through the backflow holes 102e, the diameter of the backflow holes 102e is small, so that the gas in the second chamber M2 slowly flows out, most of the biogas in the biogas digester can be discharged, and the first elastic member 107 covers the cover plate 106 on the exhaust plate 104 again until the pushing force of the first elastic member 107 on the piston 102 is larger than the pressure of the biogas in the first chamber M1 on the cover plate 106, the exhaust holes 104a are blocked, and the closing process is completed.

Example 2

Referring to fig. 1 to 9, a second embodiment of the present invention is based on the previous embodiment, and is different from the previous embodiment in that: when the raw materials in the methane tank react sufficiently, the produced methane is more and needs to be discharged stably, the invention also comprises the following devices; specifically, the methane tank lifting device comprises a lifting piece 205 positioned in the methane tank, wherein the lifting piece 205 is divided into a lifting plate 205a and a lifting boss 205b positioned in the center of the lifting plate 205a, a sliding rod 206 is connected to the outer side of the lifting plate 205a, the sliding rod 206 penetrates through a top plate 204 of the methane tank, the lifting piece 205 is used for applying thrust to the part of the second air duct 202 positioned in the methane tank, so that the piston 102 and the cover plate 106 are far away from the exhaust hole 104a to exhaust methane, the lifting boss 205b mainly applies force to the second air duct 202, the lifting plate 205a is used for fixing the lifting boss 205b and conducting the acting force, and the sliding rod 206 is used for controlling the lifting piece 205 to lift; further, a sliding hole 204a is formed in the methane tank top plate 204, a third sealing groove 204b is formed in the sliding hole 204a, and a third sealing ring 204c is arranged between the third sealing groove 204b and the sliding rod 206, so that the sliding rod 206 can ensure the sealing performance when sliding in the sliding hole 204a, preferably, a third elastic member 207 is sleeved on the sliding rod 206, the third elastic member 207 is a spring, one end of the third elastic member 207 abuts against the methane tank top plate 204, the other end of the third elastic member is connected with the lifting plate 205a, and in an initial state, the third elastic member 207 has tension to make the lifting member 205 farthest away from the methane tank top plate 204; furthermore, a part of the sliding rod 206, which is positioned on the methane tank top plate 204, is provided with a limiting column 208 along the radial direction, and one function of the limiting column 208 is to limit the part of the sliding rod 206, which can enter the methane tank, so as to prevent the sliding rod 206 from completely crossing the methane tank top plate 204.

Preferably, the embodiment further comprises a rotating member 209, the rotating member 209 is annular and is coaxially arranged with the exhaust pipe 201, an arc-shaped groove 209a is formed in one end face of the rotating member 209, which is in contact with the methane tank top plate 204, one end of the sliding rod 206 is inserted into the arc-shaped groove 209a, when the rotating member 209 rotates, the position of the sliding rod 206 in the arc-shaped groove 209a changes, the rotating member 209 further penetrates through a limiting groove 209b from the inner side to the outer side, two ends of the limiting column 208 extend into the limiting groove 209b and slide along the trend of the limiting groove 209b, the limiting groove 209b is divided into a lifting groove 209b-1 and a positioning groove 209b-2, the lifting groove 209b-1 can lift the sliding rod 206 outwards, i.e. lift the lifting member 205, specifically, the lifting groove 209b-1 further comprises a low end 209b-1a and a high end 209b-1b, a connecting line between centers of the low end 209b-1a and the high end 209b-1b and the top plate 204b The included angle between the two is an acute angle, namely the lifting groove 209b-1 is inclined, the positioning groove 209b-2 is horizontal, wherein the distance from the low end 209b-1a to the methane tank top plate 204 is less than the distance from the high end 209b-1b to the methane tank top plate 204, and the high end 209b-1b is connected with the positioning groove 209 b-2.

The implementation principle of the embodiment is as follows: in an initial state, the limiting column 208 is positioned at the low end 209b-1a of the lifting groove 209b-1, namely, the sliding rod 206 places the lifting piece 205 at the farthest distance from the biogas digester roof 204, and the lifting piece 205 does not influence the work of the exhaust unit 100; when the normally open exhaust unit 100 is needed, the rotating piece 209 is rotated, at this time, the limiting column 208 slides towards the high-position end 209b-1b in the lifting groove 209b-1, so that the sliding rod 206 slides in the sliding hole 204a to move the lifting piece 205 towards the methane tank top plate 204, the limiting column 208 continuously slides to the high-position end 209b-1b and enters the positioning groove 209b-2, at this time, the lifting protrusion 205b is already contacted with the end of the second air duct 202 and applies thrust to the second air duct 202, the cover plate 106 is indirectly far away from the exhaust hole 104a, the exhaust hole 104a is in a normally open state, correspondingly, when the state needs to be converted, the rotating piece 209 is rotated in the opposite direction, the limiting column 208 falls back to the low-position end 209b-1a, and the separation process from the exhaust unit 100 is completed. The embodiment adapts to different use scenes by switching two states through operation.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. An automatic exhaust device of a methane tank is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the exhaust unit (100) comprises a valve body (101), a piston (102) positioned in the valve body (101), a sealing seat (103) connected with one end of the valve body (101), an exhaust plate (104) connected with the other end of the valve body (101), a first air duct (105) connected with the piston (102), and a cover plate (106) connected with the first air duct (105);

the connecting unit (200) comprises an exhaust pipe (201) connected with the sealing seat (103), a second air duct (202) connected with the piston (102) and an external connecting pipe (203) connected with the exhaust plate (104), and the exhaust pipe (201) is arranged on a top plate (204) of the methane tank and communicated with the interior of the methane tank;

the piston (102) is positioned in the valve body (101) and divides the valve body (101) into a first chamber (M1) and a second chamber (M2), a connecting hole (102 a) is formed in the center of the piston (102), the first air duct (105) is divided into a first end (105 a) and a second end (105 b), the first end (105 a) is a hollow cylinder and is connected with the connecting hole (102 a), the second end (105 b) penetrates through the exhaust plate (104) and is connected with the cover plate (106), and a blocking plate (105 c) is arranged at the second end (105 b);

be provided with a plurality of exhaust hole (104 a) on air discharge plate (104), apron (106) can cover exhaust hole (104 a), be provided with on the pipe wall of first air duct (105) with breach (105 d) of first cavity (M1) intercommunication, the gas of first cavity (M1) passes through exhaust hole (104 a) flow direction external pipe (203).

2. The automatic exhaust device for the biogas digester according to claim 1, wherein: the second air duct (202) is a hollow cylinder, one end of the second air duct (202) is connected with the connecting hole (102 a), a sealing hole (103 a) is formed in the sealing seat (103), and the second air duct (202) penetrates through the sealing hole (103 a) and extends into the methane tank.

3. The automatic exhaust device for the methane tank according to claim 2, wherein: the piston further comprises a first elastic piece (107), wherein the first elastic piece (107) is located in the first chamber (M1), one end of the first elastic piece (107) is connected with the exhaust plate (104), and the other end of the first elastic piece (107) abuts against the end face of the piston (102).

4. The automatic exhaust device for the methane tank according to claim 3, wherein: a first sealing groove (102 b) is formed in the cylindrical surface of the piston (102), and a first sealing ring (108) is arranged between the first sealing groove (102 b) and the inner wall of the valve body (101);

a second sealing groove (103 b) is arranged in the sealing hole (103 a), and a second sealing ring (109) is arranged between the second sealing groove (103 b) and the second air duct (202).

5. The automatic exhaust device for the methane tank according to claim 4, wherein: a diversion hole (102 c) is formed in the piston (102), a second elastic piece (102 d) is connected to one end, close to the sealing seat (103), of the diversion hole (102 c), a pressing plate (110) is connected to one end, far away from the sealing seat (103), of the diversion hole (102 c), a limiting hole (110 a) is formed in the position, corresponding to the diversion hole (102 c), of the pressing plate (110), and a round ball (111) is arranged between the limiting hole (110 a) and the second elastic piece (102 d); the diameter of the round ball (111) is larger than that of the limiting hole (110 a) and smaller than that of the shunting hole (102 c), and the gas in the first chamber (M1) flows to the second chamber (M2) through the shunting hole (102 c);

the piston (102) is further provided with a backflow hole (102 e), and the diameter of the backflow hole (102 e) is smaller than that of the limiting hole (110 a).

6. The automatic exhaust device for the methane tank according to claim 5, wherein: the methane tank lifting device is characterized by further comprising a lifting piece (205) positioned in the methane tank, wherein the lifting piece (205) is divided into a lifting plate (205 a) and a lifting bulge (205 b) positioned in the center of the lifting plate (205 a), a sliding rod (206) is connected to the outer side of the lifting plate (205 a), and the sliding rod (206) penetrates through a top plate (204) of the methane tank.

7. The automatic exhaust device for the biogas digester according to claim 6, wherein: a sliding hole (204 a) is formed in the top plate (204) of the methane tank, a third sealing groove (204 b) is formed in the sliding hole (204 a), and a third sealing ring (204 c) is arranged between the third sealing groove (204 b) and the sliding rod (206).

8. The automatic exhaust device for the methane tank according to claim 7, wherein: a third elastic piece (207) is sleeved on the sliding rod (206), one end of the third elastic piece (207) is abutted against the methane tank top plate (204), and the other end of the third elastic piece (207) is connected with the lifting plate (205 a); the part of the sliding rod (206) positioned on the methane tank top plate (204) is provided with a limiting column (208) along the radial direction.

9. The automatic exhaust device for the methane tank according to claim 8, wherein: still including rotating piece (209), rotate piece (209) for the ring form and with blast pipe (201) coaxial arrangement, rotate piece (209) with a terminal surface of methane-generating pit roof (204) contact is provided with arc wall (209 a), slide bar (206) one end inserts to in arc wall (209 a), it still runs through by the inboard lateral surface and is provided with spacing groove (209 b) to rotate piece (209), spacing post (208) both ends stretch into in spacing groove (209 b), and follow the trend of spacing groove (209 b) slides, spacing groove (209 b) is distinguished as promoting groove (209 b-1) and constant head tank (209 b-2), promote groove (209 b-1) including low level end (209 b-1 a) and high level end (209 b-1 b) again, the line at low level end (209 b-1 a) and high level end (209 b-1 b) center with roof (204) The included angle between the two is an acute angle, the distance from the low-position end (209 b-1 a) to the methane tank top plate (204) is less than the distance from the high-position end (209 b-1 b) to the methane tank top plate (204), and the high-position end (209 b-1 b) is connected with the positioning groove (209 b-2).