CN210314268U

CN210314268U - Positive and negative pressure protector

Info

Publication number: CN210314268U
Application number: CN201920981857.4U
Authority: CN
Inventors: 刘宏飞
Original assignee: Jiangsu New Source Energy Ring Technology Co Ltd
Current assignee: Jiangsu New Source Energy Ring Technology Co Ltd
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2020-04-14
Anticipated expiration: 2029-06-26

Abstract

The utility model relates to a positive negative pressure protector uses in marsh gas collection field, and its technical scheme main points are: a positive and negative pressure protector comprises a shell divided into an upper cavity and a lower cavity, wherein the upper cavity is communicated with the outside, the lower cavity is connected with a gas transmission pipeline, the gas transmission pipeline is communicated with a fermentation tank, the bottom of the upper cavity is provided with a gas exhaust port, a gas exhaust cover is sleeved on the gas exhaust port, a first guide rod is fixedly connected onto the gas exhaust cover, a first connecting rod is arranged on the inner wall of the gas exhaust port, the first connecting rod is connected with a first guide cylinder, the bottom of the upper cavity is provided with two first clamping plates, the top ends of the two clamping plates are respectively provided with a first spring piece, the first spring pieces are abutted against the upper wall of the gas exhaust cover, the structure of the gas inlet cover is the same as that of the gas exhaust cover; the advantages are that: the liquid level difference is maintained without adding water, so that the air inlet or exhaust balance pressure value of the positive pressure protector is kept constant, and the operation is simple.

Description

Positive and negative pressure protector

Technical Field

The utility model belongs to the technical field of the marsh gas collection technique and specifically relates to a positive negative pressure protector is related to.

Background

The biogas is a renewable energy source, and is reasonably and effectively manufactured and utilized, so that the ecological environment of people is protected, and the requirements of modern social development are met. The biogas is a mixed gas generated by organic substances through the fermentation of microorganisms under the anaerobic condition, certain pressure is inevitably generated on a fermentation bag or a fermentation tank in the biogas generation process, the fermentation bag or the fermentation tank body bears the pressure with an upper limit and a lower limit, and if the pressure in the tank body exceeds or is lower than the value, the tank body is burst to cause serious safety accidents.

The positive-negative pressure protector used on a large scale in the market generally uses a water seal structure, and utilizes water level difference to control the air intake or exhaust balance pressure value of the positive-negative pressure protector, so that the requirement on the water level is accurate, and water is required to be added into the device frequently to keep the liquid level constant due to easy evaporation of water, and the operation is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a positive negative pressure protector, its advantage is: the positive-negative pressure protector can intake or exhaust air through a mechanical structure, the liquid level difference is not required to be maintained through adding water, the air intake or exhaust balance pressure value of the positive-negative pressure protector is kept constant, and the operation is simple.

The above technical purpose of the present invention can be achieved by the following technical solutions: a positive and negative pressure protector comprises a shell divided into an upper cavity and a lower cavity, wherein the upper cavity is communicated with the outside, the lower cavity is connected with a gas transmission pipeline, the gas transmission pipeline is communicated with a fermentation tank, the bottom of the lower cavity is provided with a gas exhaust port, a gas exhaust cover is sleeved on the gas exhaust port, a first guide rod is fixedly connected onto the gas exhaust cover, a first connecting rod is arranged on the inner wall of the gas exhaust port, one end of the first connecting rod, far away from the inner wall of the gas exhaust port, is connected with a first guide cylinder matched with the first guide rod, two first clamping plates are arranged at the two sides of the gas exhaust port at the bottom of the upper cavity, first spring pieces bent upwards are arranged at the top ends of the two clamping plates, one side, far away from the first clamping plates, of the first spring pieces is abutted against the upper wall of the gas exhaust cover, an air inlet cover is sleeved on the air inlet, be equipped with the second connecting rod on the air inlet inner wall, the one end that the air inlet inner wall was kept away from to the second connecting rod is equipped with the second guide cylinder with second guide bar looks adaptation, the bottom of cavity is located the both sides of air inlet down and is equipped with two second cardboards, two the second cardboard top all is equipped with the second spring leaf of upwards buckling, one side that the second cardboard was kept away from to the second spring leaf is contradicted with the air inlet lid upper wall, all be equipped with the sealing washer between air inlet lid and the air inlet and between exhaust lid and the gas vent, two the sealing washer is located the lid department of air inlet lid and exhaust lid respectively and is half surrounding structure parcel lid mouth.

By adopting the technical scheme, the gas transmission pipeline is communicated with the fermentation tank, so that the pressure in the fermentation tank is the same as that of the lower cavity, when the pressure in the lower cavity is greater than the external atmospheric pressure and the difference value is greater than the preset value, the exhaust cover is jacked up by the air pressure in the lower cavity, when the exhaust cover is separated from the outer side wall of the exhaust port, the gas in the lower cavity enters the upper cavity and is discharged to the outside through the upper cavity, at the moment, the air pressure in the lower cavity is reduced, and when the air pressure is reduced to be insufficient to jack the exhaust cover, the exhaust cover falls down and reseals the exhaust port. The cooperation of the first guide rod and the first guide cylinder limits the movement track of the exhaust cover when the exhaust cover is jacked up and falls down, and reduces the deviation of the exhaust cover in the movement process to cause the sealing failure between the exhaust cover and the exhaust port;

when the pressure in the lower cavity is smaller than the external atmospheric pressure and the difference value is larger than the preset value, the external atmospheric pressure jacks up the air inlet cover at the air inlet, when the air inlet cover is separated from the air inlet, the external air enters the lower cavity, the pressure of the lower cavity rises at the moment, when the jacking force generated by the pressure difference is not enough to jack up the air inlet cover, the air inlet cover falls down and reseals the air inlet, the movement track of the air inlet cover during jacking and falling is limited by the cooperation of the second guide rod and the second guide cylinder, the deviation of the air inlet cover in the movement process is reduced, and the sealing failure between the air inlet cover and the air inlet is caused. The first spring leaf will admit air the bottom of lid and last cavity, and the second spring leaf supports the exhaust lid tightly with the diapire of cavity down, has increased the leakproofness between last cavity and lower cavity, lower cavity and the external environment. The balance of the pressure in the fermentation tank is realized through a mechanical mechanism, the pressure balance is realized without a water seal method and water level difference, further, the frequent water addition to positive and negative pressure protection is not needed, and the operation is simple.

The utility model discloses further set up to: the top of admitting air lid and the top of exhaust lid all are provided with a magnet, two magnet respectively with last cavity inner wall and cavity inner wall fixed connection, work as when first guide bar stretches out the limit along first guide cylinder, exhaust lid and magnet separation work as when the second guide bar stretches out the limit along the second guide cylinder, admit air lid and magnet separation, admit air lid and exhaust lid are the magnetic metal material, the magnetic force that magnet produced to admit air lid or exhaust lid just is less than the dead weight of admitting air lid or exhaust lid all the time along with the magnet and admit air lid or the distance change of exhaust lid.

By adopting the technical scheme, the preset pressure balance value of the positive and negative pressure protector is the difference value between the sum of the dead weight of the air inlet cover and the vertical pressure of the first spring piece on the air inlet cover and the magnetic attraction of the magnet on the air inlet cover when the air inlet cover is closed on the air inlet, when the pressure in the lower cavity rises to the preset pressure balance value, the air inlet cover is jacked up, and at the moment, one end, far away from the first clamping plate, of the first spring piece slides to the side wall of the air inlet cover due to the bending of the first spring piece, so that the pressure of the spring piece on the vertical direction of the air inlet cover disappears, the magnetic attraction of the magnet on the air inlet cover is increased, the jacking speed of the air inlet cover is accelerated, when the pressure in the lower cavity is not enough to support the air inlet cover to jack up, the air inlet cover begins to fall down, and because the magnetic attraction of the magnet on the air, the principle and process of the action of the magnet on the air inlet cover are the same as those of the air outlet cover. The sensitivity of the positive and negative pressure protector for balancing pressure is increased.

The utility model discloses further set up to: and rubber layers are arranged on the outer side walls of the air inlet and the air outlet.

Through adopting above-mentioned technical scheme, because there is inflammable gas in the marsh gas, reduced first spring leaf and second spring leaf respectively in the exhaust cover and the gas inlet cover lateral wall when rubbing the possibility that produces the spark through setting up the rubber layer to reduce because inflammable gas is ignited in the marsh gas and cause dangerous possibility, promoted the security performance of device.

The utility model discloses further set up to: and a manual balance valve is arranged on the side wall of the lower cavity chamber.

Through adopting above-mentioned technical scheme, overhaul the messenger as needs to fermentation cylinder or positive negative pressure protector, the staff makes the lower chamber direct and external environment intercommunication through opening manual balance valve, and the atmospheric pressure in the direct balanced lower chamber has increased the practicality of device.

The utility model discloses further set up to: and a pressure gauge is arranged on the side wall of the lower cavity chamber.

Through adopting above-mentioned technical scheme, whether the staff accessible is observed the manometer and is looked over the pressure in the cavity of resorption and surpass the pressure balance value scope of predetermineeing, and then whether normal work of positive negative pressure protector is known simply and clearly, has promoted the convenience of device.

The utility model discloses further set up to: and the bottom of the upper chamber at the air outlet and the bottom of the lower chamber at the air inlet are both provided with lubricating oil grooves, the lubricating oil grooves are arranged around the air outlet or the air inlet, and lubricating oil is injected into the lubricating oil grooves.

Through adopting above-mentioned technical scheme, when the exhaust cover or the lid that admits air and the bottom contact of last cavity or lower cavity, the flap all is located the lubrication groove, has reduced the friction of sealing washer and gas vent lateral wall or air inlet lateral wall through making the sealing washer infiltration lubricating oil, has reduced frictional force and has just adjusted the influence of negative pressure protector to predetermineeing pressure balance value to the possibility that frictional force slows down exhaust cover or the lid opening speed of admitting air has been reduced, and then the reliability that pressure balance value was predetermine to the device has been promoted.

The utility model discloses further set up to: and the upper chamber side wall and the lower chamber side wall are respectively provided with an oil injection pipe, and the two oil injection pipes respectively extend into the two lubricating oil grooves.

Through adopting above-mentioned technical scheme, when lubricating oil by the loss because of volatilizing, staff's accessible oiling pipe directly thinks lubricating oil tank interpolation lubricating oil, and needn't unpack the casing apart and fill lubricating oil, has promoted the practicality and the convenience of device.

The utility model discloses further set up to: and a rain shielding cover is arranged at the opening of the upper chamber communicated with the outside.

Through adopting above-mentioned technical scheme, reduce the rainwater and get into the possibility that the casing normally worked and cause the influence to the positive negative pressure protector, promoted the stability of device work.

To sum up, the utility model discloses a beneficial technological effect does: the pressure in the fermentation tank is balanced through a mechanical structure, a water sealing method and a method for controlling pressure difference by water level are not used, water is not required to be injected into the shell frequently to ensure that the water level is constant, and the operation is simple.

Drawings

Fig. 1 is a schematic structural diagram of the present embodiment.

Fig. 2 is a schematic structural diagram of the intake cover and the exhaust cover of the present embodiment.

Fig. 3 is an enlarged schematic view at a of fig. 2.

FIG. 4 is a schematic structural view for embodying the filler pipe of the present embodiment.

In the figure, 1, a housing; 11. an upper chamber; 12. a lower chamber; 121. a gas pipeline; 13. a magnet; 3. an exhaust port; 31. an exhaust cover; 32. a first guide bar; 33. a first link; 34. a first guide cylinder; 35. a first clamping plate; 351. a first spring plate; 4. an air inlet; 41. an air intake cover; 42. a second guide bar; 43. a second link; 44. a second guide cylinder; 45. a second clamping plate; 451. a second spring plate; 5. a seal ring; 6. a rubber layer; 7. a manual balancing valve; 8. a pressure gauge; 9. a lubricating oil groove; 91. an oil filling pipe; 10. a rain cover.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b): a positive and negative pressure protector comprises a shell 1, wherein the shell 1 is divided into an upper cavity 11 and a lower cavity 12, the upper cavity 11 is provided with an opening communicated with the external environment, the upper cavity 11 is communicated with the lower cavity 12 through an exhaust port 3, the lower cavity 12 is communicated with the external environment through an air inlet 4, the exhaust port 3 is sleeved with an exhaust cover 31, and the air inlet 4 is sleeved with an air inlet cover 41. The inner wall of the lower chamber 12 is provided with a gas transmission pipeline 121, the gas transmission pipeline 121 is communicated with the fermentation tank to enable the air pressure of the lower chamber 12 to be consistent with that of the fermentation tank, the exhaust cover 31 is provided with a first guide rod 32, the first guide rod 32 extends into the exhaust port 3, the opening wall of the exhaust port 3 is provided with a first connecting rod 33 (shown in figure 4), one side of the first connecting rod 33, away from the opening wall, is provided with a first guide cylinder 34 matched with the first guide rod 32, two first clamping plates 35 are symmetrically arranged at two sides of the exhaust port 3 at the bottom of the upper chamber 11, the two first clamping plates 35 are respectively provided with a first spring leaf 351 bent upwards, and one end, away from the first clamping plate 35, of the first spring leaf 351 is abutted against the upper wall of the exhaust cover 31 and exerts vertical and downward elastic force on the;

as shown in fig. 2, the lower chamber 12 is provided with a second guide rod 42, a second guide cylinder 44, a second connecting rod 43 (as shown in fig. 4), a second catch plate 45 and a second spring strip 451, and the positions and connection manners of the components in the lower chamber 12 and the corresponding components in the upper chamber 11 are the same. Sealing rings 5 are arranged between the air inlet cover 41 and the air inlet 4 and between the air outlet cover 31 and the air outlet 3, the sealing rings 5 are respectively positioned at cover openings of the air inlet cover 41 and the air outlet cover 31 and wrap the cover openings in a semi-surrounding structure, the sealing rings 5 simultaneously seal the space between the air inlet cover 41 and the air inlet 4, the bottom of the air inlet cover 41 and the lower chamber 12, the bottom of the air outlet cover 31 and the air outlet 3 and the bottom of the air outlet cover 31 and the bottom of the upper chamber 11, the first spring leaf 351 and the second spring leaf 451 respectively abut against the air outlet cover 31 and the air inlet cover 41, pressing forces between the sealing rings 5 and the bottom of the upper chamber 11 and between the sealing rings 5 and the bottom of the lower;

as shown in fig. 2, when the air pressure in the lower chamber 12 rises and reaches a predetermined value, the exhaust cover 31 is lifted upwards, at this time, the first spring leaf 351 is further bent and one end of the first spring leaf abutting against the top of the exhaust cover 31 slides to the side wall of the exhaust cover 31, that is, the first spring leaf 351 does not generate vertical downward pressure on the exhaust cover 31 any more so that the exhaust cover 31 is easy to be lifted further, when the exhaust cover 31 is separated from the exhaust port 3, biogas floods into the upper chamber 11 from the exhaust port 3, at this time, the pressure in the lower chamber 12 drops, and when the pressure in the lower chamber 12 is not enough to lift the exhaust cover 31, the exhaust cover 31 falls down and re-closes the exhaust port 3, at this time, the first spring again abuts against the top of the exhaust. When the air pressure in the lower chamber 12 drops and reaches a predetermined value, the air inlet cover 41 is lifted upward by the ambient atmospheric pressure, and moves in the same manner as the air outlet cover 31. The pressure of the fermentation tank is balanced through the mechanical structure, water is not required to be added into the device repeatedly to keep the water level constant, and the operation is simple.

As shown in fig. 2, magnets 13 are fixedly connected to the inside of the upper chamber 11 and the inside of the lower chamber 12, respectively, and two magnets 13 are located above the exhaust cover 31 or the intake cover 41, respectively, when a first guide rod 32 fixedly connected to the exhaust cover 31 extends to the limit, the exhaust cover 31 is separated from the magnets 13, and when a second guide rod 42 fixedly connected to the intake cover 41 extends to the limit, the intake cover 41 is separated from the magnets 13, and at this time, the magnetic attraction of the magnets 13 to the intake cover 41 is smaller than the self weight of the intake cover 41, and when the exhaust cover 31 or the intake cover 41 abuts against the bottom of the upper chamber 11 or the bottom of the lower chamber 12, the magnets 13 have a magnetic attraction to the exhaust cover 31 or the intake cover 41. When the exhaust cover 31 is lifted upwards, the magnetic attraction of the magnet 13 to the exhaust cover 31 increases with the decrease of the distance between the exhaust cover 31 and the magnet 13, meanwhile, because the first spring leaf 351 does not produce vertical downward pressure to the exhaust cover 31 any more, the exhaust cover 31 is lifted rapidly, the time required for separating the exhaust cover 31 from the exhaust port 3 is reduced, when the exhaust cover 31 falls, the magnet 13 slows down the falling speed of the exhaust cover 31, the time for balancing the air pressure is prolonged, and the air pressure is balanced more fully. The effect of the magnet 13 on the inlet cover 41 is the same as the effect on the outlet cover 31, increasing the sensitivity of the device and improving the performance of the device.

As shown in fig. 3 and 4, the rubber layer 6 is arranged on the outer side wall of the air inlet 4 and the outer side wall of the air outlet, so that the possibility of sparks generated between the first spring piece 351 and the exhaust cover and between the second spring piece 451 and the air inlet cover 41 during friction is reduced, the possibility of accidents caused by ignition of methane in the device is reduced, and the safety of the device is improved.

As shown in fig. 3, the inner wall of the housing 1 at the air inlet 4 and the air outlet 3 is provided with a lubricating oil groove 9 surrounding the air inlet 4 or the air outlet 3, lubricating oil is filled in the lubricating oil groove 9, when the air inlet cover 41 and the air outlet cover 31 fall down and are abutted against the inner wall of the corresponding housing 1, the two sealing rings 5 are soaked in the lubricating oil, the friction between the sealing rings 5 and the air inlet 4 or the air outlet 3 is reduced, thereby reducing the influence of friction force on the preset pressure balance value, the side wall of the lower chamber 12 is provided with an oil injection pipe 91 for adding the lubricating oil, and the sensitivity and the practicability of the device are increased.

As shown in fig. 4, a pressure gauge 8 is arranged on the side wall of the lower chamber 12, the dial of the pressure gauge 8 is positioned outside the lower chamber 12, and a manual balance valve 7 is arranged on the side wall of the lower chamber 12. The pressure in the lower chamber 12 is monitored by the staff through referring to the indication of the pressure gauge 8, when the pressure in the lower chamber 12 is abnormal due to the failure of the device, the staff can open the manual balance valve 7 to directly communicate the lower chamber 12 with the external environment, and the pressure on the fermentation tank is released emergently, so that the possibility of accidents is reduced, and the reliability of the device is improved.

As shown in fig. 4, an opening communicated with the external environment is formed in the top of the upper chamber 11, and a rain shielding cover 10 is arranged at the opening, so that the possibility of influence on the operation of the device caused by rainwater entering the device in rainy days is reduced, and the reliability of the device is improved.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A positive and negative pressure protector is characterized in that: including dividing into casing (1) of last cavity (11) and lower cavity (12), go up cavity (11) and external intercommunication, cavity (12) are connected with gas transmission pipeline (121) down, gas transmission pipeline (121) and fermentation cylinder intercommunication, it is equipped with gas vent (3) to go up cavity (11) bottom, the cover is equipped with exhaust cover (31) on gas vent (3), fixedly connected with first guide bar (32) on exhaust cover (31), be equipped with first connecting rod (33) on gas vent (3) inner wall, the one end that gas vent (3) inner wall was kept away from in first connecting rod (33) is connected with first guide cylinder (34) with first guide bar (32) looks adaptation, the bottom of going up cavity (11) is located the both sides of gas vent (3) and is equipped with two first cardboard (35), two first cardboard (35) top all is equipped with the first spring leaf (351) of upwards buckling, one side of the first spring piece (351) far away from the first clamping plate (35) is abutted against the upper wall of the exhaust cover (31);

the bottom of the lower cavity (12) is provided with an air inlet (4), the air inlet (4) is sleeved with an air inlet cover (41), a second guide rod (42) is fixed on the air inlet cover (41), a second connecting rod (43) is arranged on the inner wall of the air inlet (4), one end, far away from the inner wall of the air inlet (4), of the second connecting rod (43) is provided with a second guide cylinder (44) matched with the second guide rod (42), two second clamping plates (45) are arranged on two sides, located on the air inlet (4), of the bottom of the lower cavity (12), the top ends of the two second clamping plates (45) are respectively provided with a second spring piece (451) bent upwards, one side, far away from the second clamping plates (45), of the second spring pieces (451) is abutted against the upper wall of the air inlet cover (41), sealing rings (5) are arranged between the air inlet cover (41) and the air inlet (4) and between the exhaust cover (31) and, the two sealing rings (5) are respectively positioned at the cover openings of the air inlet cover (41) and the air outlet cover (31) and wrap the cover openings in a semi-surrounding structure.

2. The positive and negative voltage protector of claim 1, wherein: the air inlet cover is characterized in that a magnet (13) is arranged above the air inlet cover (41) and above the air outlet cover (31), the two magnets (13) are fixedly connected with the inner wall of the upper chamber (11) or the inner wall of the lower chamber (12) respectively, when the first guide rod (32) extends out to the limit along the first guide cylinder (34), the air outlet cover (31) is separated from the magnet (13), when the second guide rod (42) extends out to the limit along the second guide cylinder (44), the air inlet cover (41) is separated from the magnet (13), the air inlet cover (41) and the air outlet cover (31) are both made of magnetic metal, and the magnetic force generated by the magnet (13) to the air inlet cover (41) or the air outlet cover (31) changes along with the distance between the magnet (13) and the air inlet cover (41) or the air outlet cover (31) and is always smaller than the self weight of the air inlet cover (41) or the air outlet cover (31).

3. The positive and negative voltage protector of claim 2, wherein: and rubber layers (6) are arranged on the outer side walls of the air inlet (4) and the air outlet (3).

4. The positive and negative voltage protector of claim 3, wherein: and a manual balance valve (7) is arranged on the side wall of the lower chamber (12).

5. The positive and negative voltage protector of claim 1, wherein: and a pressure gauge (8) is arranged on the side wall of the lower chamber (12).

6. The positive and negative voltage protector of claim 2, wherein: be located last cavity (11) bottom of gas vent (3) department is equipped with and is located lower cavity (12) bottom of gas inlet (4) department and all is equipped with lubricating groove (9), lubricating groove (9) encircle gas vent (3) or gas inlet (4) and set up, lubricating oil has all been annotated in lubricating groove (9).

7. The positive and negative voltage protector of claim 6, wherein: and oil injection pipes (91) are arranged on the side wall of the upper cavity (11) and the side wall of the lower cavity (12), and the oil injection pipes (91) respectively extend into the two lubricating oil grooves (9).

8. The positive and negative voltage protector of claim 7, wherein: and a rain shielding cover (10) is arranged at an opening of the upper chamber (11) communicated with the outside.