CN113389923A

CN113389923A - Pressure relief device for mushroom sterilization

Info

Publication number: CN113389923A
Application number: CN202110789693.7A
Authority: CN
Inventors: 张广龙
Original assignee: Shandong Taima Biotechnology Co ltd
Current assignee: Shandong Taima Biotechnology Co ltd
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2021-09-14

Abstract

The invention discloses a pressure relief device for mushroom sterilization, which comprises a shell, wherein an air inlet pipe is arranged at the lower part of the shell, an air outlet pipe is arranged at the upper end of the shell, one end of the air inlet pipe, which is positioned in the shell, is fixedly communicated with a spiral lower pipe, one end of the air outlet pipe, which is positioned in the shell, is fixedly communicated with an upper pipe, the upper pipe and the lower pipe are mutually communicated, and pressure relief assemblies are arranged on the air inlet pipe and the air outlet pipe. Has the advantages that: the invention is provided with two pressure relief assemblies, when the air pressure in the air inlet pipe or the air outlet pipe is large, the pressure relief assembly can jack the gland upwards, and at the moment, high-pressure air in the pipeline can move upwards through the pressure relief pipe, so that the pressure relief effect is generated, meanwhile, the stiffness coefficient of the compression spring at the air inlet pipe is larger, so that the air pressure input to the lower pipe is not too low, and the compression spring at the air outlet pipe directly determines the output air pressure, so that the output air pressure cannot be too high, and the normal work of subsequent sterilization is ensured.

Description

Pressure relief device for mushroom sterilization

Technical Field

The invention relates to the technical field of mushrooms, in particular to a pressure relief device for sterilizing mushrooms.

Background

The mushroom contains abundant protein and amino acid, and the content of the mushroom is several times to dozens of times of that of common vegetables and fruits. 1 kg of dried mushrooms contain a protein equivalent to the protein content of 2 kg of lean meat, 3 kg of eggs or 12 kg of milk. The mushroom is delicious and rich in nutrition, is often called as a health food by people, for example, the mushroom not only contains various amino acids necessary for human bodies, but also has the effects of reducing cholesterol in blood and treating hypertension, and the mushroom, the needle mushroom and the hericium erinaceus are found to contain substances for enhancing the anticancer capability of human bodies.

Chinese mushroom is rich in resources, is one of the earliest countries for cultivating and utilizing the mushroom, is delicious and rich in nutrition, is often called as health food by people, is popular at present, is generally planted manually, relates to a mushroom stick sterilization technical link, and is also one of important links for producing the mushroom. The sterilization of the mushroom sticks in the existing production and technology is performed in a pot type steam mode, so that the sterilization efficiency is low, the energy consumption is high, the production cost is high, the large-scale production is not facilitated, and the development of the mushroom industry is restricted to a great extent; the mushroom fungus stick sterilization room of sterilization efficiency height, low energy consumption adopts municipal heating installation to supply the heating installation, and the municipal administration provides 180 ℃ high pressure heating installation, and pressure is too big, unable direct use, need reduce pressure after, input sterilization room again, supply to disinfect and use.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a pressure relief device for sterilizing mushrooms.

In order to achieve the purpose, the invention adopts the following technical scheme: the pressure relief device for mushroom sterilization comprises a shell, wherein an air inlet pipe is arranged at the lower part of the shell, an air outlet pipe is arranged at the upper end of the shell, a spiral lower pipe is fixedly communicated with one end of the air inlet pipe, which is positioned inside the shell, an upper pipe is fixedly communicated with one end of the air outlet pipe, which is positioned inside the shell, the upper pipe and the lower pipe are communicated with each other, and pressure relief assemblies are arranged on the air inlet pipe and the air outlet pipe;

the utility model discloses a high-voltage tube, including casing lateral wall, side box, upper end and top tube, the lower extreme of side box is connected with the cover, the cover is established at the junction of top tube and low tube to the cover, cover the annular gasbag and its upper end and top tube fixed connection, the upper portion of casing is provided with the pressure release pipe of direct and external intercommunication.

In foretell decompression ware for fungus mushroom sterilization, sealed sliding connection has the piston board in the side box, the fixed flexible pipe that is provided with in upper end of piston board, the top of flexible pipe and the interior top fixed connection of side box, the lateral wall of upper tube is provided with the cavity, the cavity passes through stereoplasm pipeline and flexible pipe intercommunication, the top of side box is provided with communicating pipe, communicating pipe and the cover intercommunication that hides.

In foretell fungus mushroom is pressure release ware for sterilization, the pressure release subassembly includes the pressure release pipe, the overcoat of pressure release pipe is equipped with pressure spring, pressure spring's top fixedly connected with gland, intake pipe department the pressure release pipe communicates with the intake pipe, and the outlet duct department the pressure release pipe communicates with the outlet duct, the stiffness coefficient of intake pipe department pressure spring is greater than the stiffness coefficient of outlet duct department pressure spring.

In foretell oozing ware for fungus mushroom sterilization, the outer wall of casing is provided with water supply assembly, water supply assembly includes inlet tube and outlet pipe, the inlet tube sets up the lateral wall on the casing, the outlet pipe sets up the lower wall at the casing, inlet tube and external water source intercommunication.

In foretell decompression ware for fungus mushroom sterilization, a curved heat absorption groove has been seted up to the lateral wall of casing, heat absorption groove department cooperation has the rotation external member, rotate the external member including rotating the pivot of connecting in external frame, a plurality of dwangs of fixedly connected with in the pivot, every the heat dissipation cover of equal fixedly connected with on the dwang, heat dissipation cover and dwang are hollow structure and the two intercommunication of each other, the pivot is located the centre of a circle department of heat absorption groove arcwall face, during the heat dissipation cover motion with heat absorption groove surface laminating.

In foretell oozing ware for fungus mushroom sterilization, the sealed sliding connection of dwang inner wall has a balancing weight that uses permanent magnetic material to make, all be provided with the impeller in outlet pipe and the inlet pipe, the unable flow of liquid in the pipeline when the impeller does not change, liquid flow in the drive pipeline when the impeller rotates.

In the pressure relief device for sterilizing the mushrooms, the permanent magnet is embedded on the surface of the impeller positioned in the water outlet pipe, the middle shaft of the impeller penetrates through the outer wall of the corresponding pipeline, the middle shaft of the impeller at the water inlet pipe is fixedly connected with a first gear, the first gear is meshed with a second gear, the second gear and the middle shaft of the impeller at the water outlet pipe are fixedly connected with a synchronizing wheel, and the synchronizing wheels are sleeved with a synchronous belt.

In foretell pressure release ware for fungus mushroom sterilization, the bottom intercommunication that the intake pipe is close to low tube one side has the outlet pipe, the outlet pipe is provided with two inverted Y type structures of being in charge of for the bottom, two ports in the outlet pipe bottom all communicate with the external world, all be provided with two baffles in two minutes in the outlet pipe bottom, one of them the baffle rotates the lower mouth of being in charge of, another the baffle rotates the middle part lateral wall of connecting in charge of, the baffle rotates to and blocks the flow of being in charge of when being perpendicular with in charge of, and is same two baffles in the branch are mutually perpendicular.

In foretell oozing ware for fungus mushroom sterilization, every the axis of baffle all runs through and divides a tub lateral wall and a wrench gear of fixedly connected with, two of same branch pipe department the common meshing of wrench gear has a rack, fly leaf of fixedly connected with on the rack, divide a tub outer wall fixedly connected with baffle, baffle and the common fixedly connected with metal spring of fly leaf, divide tub inner wall to inlay and be equipped with the contact of two metallics, two the contact divides the metal spring electric connection of pipe department with corresponding.

Compared with the prior art, the invention has the advantages that:

1. the invention is provided with two pressure relief assemblies, the stiffness coefficient of a compression spring at an air inlet pipe is larger than that of a compression spring at an air outlet pipe, when the air pressure in the air inlet pipe or the air outlet pipe is large, a gland can be jacked upwards, high-pressure air in a pipeline can move upwards through a pressure relief pipe at the moment, so that the pressure relief effect is generated, meanwhile, the stiffness coefficient of the compression spring at the air inlet pipe is larger, so that the air pressure input to a lower pipe is not too low, and the compression spring at the air outlet pipe directly determines the output air pressure, so that the output air pressure cannot be too high, and the normal subsequent sterilization work is ensured;

2. the heat dissipation sleeve is contacted with the surface of the heat absorption groove and absorbs heat, the balancing weight moves to enable the rotating rod to rotate and drive the impellers to rotate, the rotating directions of the two impellers are opposite through a synchronous belt part structure, the rotating amounts are consistent, and namely when water is discharged outwards, the water inlet pipe can be filled with the same amount of water inwards; the hot water discharged from the shell can be supplied for external use, and the higher the water temperature in the shell is, the higher the rotating speed of the radiating sleeve part is, and the larger the discharged water quantity is; the more cold water enters the shell, the faster the heat exchange speed between the lower pipe and the cold water is, and the faster the high-pressure air energy can be utilized.

3. The water that condenses in upper tube, the lower pipe can flow to the outlet pipe in, when water accumulation to submerging two contacts, metal spring can the circular telegram shrink to drive the rack slip, twist the gear and rotate and drive the baffle and rotate, make the baffle that corresponds the branch socle portion open, the upside baffle seals, can be with the water discharge of bottom accumulation, also avoids the outlet pipe to discharge the high-pressure air in the lower pipe fast.

Drawings

FIG. 1 is a schematic structural view of a pressure relief device for mushroom sterilization according to the present invention;

FIG. 2 is an enlarged schematic view of a pressure relief pipe portion of the pressure relief device for mushroom sterilization according to the present invention;

FIG. 3 is an enlarged schematic view of a rotary rod part of the pressure relief device for mushroom sterilization according to the present invention;

FIG. 4 is an enlarged schematic view of a drain pipe portion of the pressure relief device for mushroom sterilization according to the present invention;

FIG. 5 is a partial cross-sectional view of an upper tube of the pressure relief device for mushroom sterilization according to the present invention.

In the figure: 1 shell, 2 air inlet pipes, 3 lower pipes, 4 upper pipes, 41 cavities, 5 side boxes, 6 piston plates, 7 telescopic pipes, 8 communicating pipes, 9 air outlet pipes, 10 pressure relief pipes, 11 pressing covers, 12 pressing springs, 13 water drain pipes, 14 blocking sleeves, 15 pressure relief pipes, 16 water inlet pipes, 17 water outlet pipes, 18 rotating rods, 19 heat dissipation sleeves, 20 heat absorption grooves, 21 balancing weights, 22 impellers, 23 first gears, 24 second gears, 25 synchronizing wheels, 26 synchronous belts, 27 fixing plates, 28 metal springs, 29 movable plates, 30 racks, 31 twisting gears, 32 baffle plates and 33 contacts.

Detailed Description

The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

Examples

Referring to fig. 1-5, a pressure relief device for mushroom sterilization comprises a shell 1, wherein an air inlet pipe 2 is arranged at the lower part of the shell 1, an air outlet pipe 9 is arranged at the upper end of the shell 1, one end, located inside the shell 1, of the air inlet pipe 2 is fixedly communicated with a spiral lower pipe 3, one end, located inside the shell 1, of the air outlet pipe 9 is fixedly communicated with an upper pipe 4, the upper pipe 4 and the lower pipe 3 are communicated with each other, pressure relief assemblies are arranged on the air inlet pipe 2 and the air outlet pipe 9, and the pressure relief assemblies at the two positions perform pressure relief twice, so that high-pressure air finally output for sterilization can be stably used;

the side wall of the shell 1 is provided with a side box 5, the upper end of the side box 5 is connected with an upper pipe 4, the lower end of the side box 5 is connected with a blocking sleeve 14, the blocking sleeve 14 is sleeved at the joint of the upper pipe 4 and a lower pipe 3, the blocking sleeve 14 is an annular air bag, the upper end of the blocking sleeve is fixedly connected with the upper pipe 4, the upper part of the shell 1 is provided with a pressure relief pipe 15 which is directly communicated with the outside, and the pressure relief pipe 15 is used for ensuring the stability of the pressure in the shell 1;

a piston plate 6 is connected in the side box 5 in a sealing and sliding manner, an extension tube 7 is fixedly arranged at the upper end of the piston plate 6, the top end of the extension tube 7 is fixedly connected with the inner top of the side box 5, a cavity 41 is arranged on the side wall of the upper tube 4, the cavity 41 is communicated with the extension tube 7 through a hard pipeline, a communicating tube 8 is arranged at the top of the side box 5, and the communicating tube 8 is communicated with the blocking sleeve 14; when the shielding sleeve 14 extends, the lower end of the shielding sleeve moves downwards to shield the lower pipe 3, otherwise, the shielding sleeve 14 does not shield the lower pipe 3 when the shielding sleeve is shortened, and the shielding sleeve 14 is an annular air bag and can shield the surface of the lower pipe 3 to reduce the heat exchange speed between the lower pipe 3 and water in the shell 1, so that the phenomenon that the temperature of air in the upper pipe 4 is too low, namely the shielding sleeve 14 contracts when the temperature in the upper pipe 4 is too high, more heat exchange between the lower pipe 3 and the water is generated, and otherwise, the lower pipe 3 is shielded to generate a heat preservation effect;

the pressure release subassembly includes the pressure release pipe 10, the overcoat of pressure release pipe 10 is equipped with pressure spring 12, pressure spring 12's top fixedly connected with gland 11, pressure release pipe 10 and the 2 intercommunications of intake pipe 2 department, pressure release pipe 10 and the 9 intercommunications of outlet duct 9 department of outlet duct, the stiffness coefficient of 2 department pressure spring 12 of intake pipe is greater than the stiffness coefficient of 9 department pressure spring 12 of outlet duct, when atmospheric pressure in intake pipe 2 or the outlet duct 9 is big, can upwards jack-up gland 11, highly-compressed air in the pipeline can upwards move through pressure release pipe 10 this moment, thereby produce the pressure release effect, the stiffness coefficient of 2 department pressure spring 12 of intake pipe is bigger simultaneously, make the atmospheric pressure of inputing to low tube 3 be unlikely to low excessively, and pressure spring 12 of 9 department of outlet duct then direct decision output atmospheric pressure, so can not lead to output atmospheric pressure too high greatly, guarantee follow-up sterilization work normally.

The outer wall of casing 1 is provided with water supply assembly, and water supply assembly includes inlet tube 16 and outlet pipe 17, and inlet tube 16 sets up the last lateral wall at casing 1, and outlet pipe 17 sets up the lower wall at casing 1, and inlet tube 16 and external water source intercommunication for supply water in to casing 1, under the normal condition, the low tube 3 should be submerged to the water in the casing 1.

A curved heat absorption groove 20 has been seted up to the lateral wall of casing 1, heat absorption groove 20 department cooperation has the rotation external member, the rotation external member is including rotating the pivot of connection in external frame, a plurality of dwang 18 of fixedly connected with in the pivot, a heat dissipation cover 19 of equal fixedly connected with on every dwang 18, heat dissipation cover 19 and dwang 18 are hollow structure and the two communicates each other, the pivot is located the centre of a circle department of heat absorption groove 20 arcwall face, during the motion of heat dissipation cover 19 with heat absorption groove 20 surface laminating. The heat dissipation sleeve 19 contacts with the surface of the heat absorption groove 20, so that heat of the shell 1 can be absorbed rapidly, the heat absorption of the heat dissipation sleeve 19 can enable the air pressure inside the heat dissipation sleeve to rise to cause air expansion, the balancing weight 21 is pushed to move in the rotating rod 18, the weight of each rotating rod 18 cannot be kept balanced and rotates at the moment, the corresponding heat dissipation sleeve 19 is separated from the original position, heat dissipation is conducted outwards, the other heat dissipation sleeve moves to be attached to the surface of the shell 1, and then the actions can be repeated automatically.

The inner wall of the rotating rod 18 is connected with a balancing weight 21 made of a permanent magnet material in a sealing and sliding mode, impellers 22 are arranged in the water outlet pipe 17 and the water inlet pipe 16, liquid in the pipeline cannot flow when the impellers 22 do not rotate, the impeller 22 drives the liquid in the pipeline to flow when rotating, the balancing weight 21 made of a permanent magnet drives the impeller 22 to rotate when rotating along with the rotating rod 18, and therefore the impeller 22 on the lower side rotates to discharge water in the water outlet pipe 17 outwards;

the surface of the impeller 22 in the water outlet pipe 17 is embedded with a permanent magnet, the middle shaft of the impeller 22 penetrates through the outer wall of the corresponding pipeline, the middle shaft of the impeller 22 at the water inlet pipe 16 is fixedly connected with a first gear 23, the first gear 23 is meshed with a second gear 24, the middle shafts of the impeller 22 at the positions of the second gear 24 and the water outlet pipe 17 are fixedly connected with a synchronizing wheel 25, the two synchronizing wheels 25 are jointly sleeved with a synchronous belt 26, the two impellers 22 are opposite in steering through a part of the structure of the synchronous belt 26, the rotating amount is consistent, namely, when water is discharged outwards, the position of the water inlet pipe 16 can be filled with equivalent water inwards.

The bottom of the air inlet pipe 2 close to one side of the lower pipe 3 is communicated with a water drain pipe 13, the water drain pipe 13 is of an inverted Y-shaped structure with two branch pipes arranged at the bottom, two ports at the bottom of the water drain pipe 13 are communicated with the outside, two baffles 32 are arranged in the two branch pipes at the bottom of the water drain pipe 13, one baffle 32 is rotatably connected to a lower pipe opening of the branch pipe, the other baffle 32 is rotatably connected to the side wall of the middle part of the branch pipe, the baffles 32 rotate to be perpendicular to the branch pipe to block the flow of liquid in the branch pipe, and the two baffles 32 in the same branch pipe are perpendicular to each other.

The middle shaft of each baffle 32 penetrates through the side wall of the branch pipe and is fixedly connected with a twisting gear 31, two twisting gears 31 at the same branch pipe are jointly meshed with a rack 30, a movable plate 29 is fixedly connected to the rack 30, a baffle 32 is fixedly connected to the outer wall of the branch pipe, a metal spring 28 is fixedly connected to the baffle 32 and the movable plate 29, two metal contacts 33 are embedded in the inner wall of the branch pipe, and the two contacts 33 are electrically connected with the metal spring 28 at the corresponding branch pipe. The water of condensation in upper tube 4, the lower tube 3 can flow to the outlet pipe 13 downwards, when water accumulation to submerging two contacts 33, metal spring 28 can the circular telegram shrink to drive rack 30 slip, twist gear 31 and rotate and drive baffle 32 and rotate, make the baffle 32 that corresponds the branch socle portion open, upside baffle 32 seals, can be with the water discharge of bottom accumulation, also avoid outlet pipe 13 to discharge the highly-compressed air in the lower tube 3 fast.

Although terms such as the housing 1, the air inlet pipe 2, the lower pipe 3, the upper pipe 4, the cavity 41, the side box 5, the piston plate 6, the telescopic pipe 7, the communicating pipe 8, the air outlet pipe 9, the pressure relief pipe 10, the gland 11, the compression spring 12, the drain pipe 13, the blocking sleeve 14, the pressure relief pipe 15, the water inlet pipe 16, the water outlet pipe 17, the rotating rod 18, the heat dissipation sleeve 19, the heat absorption groove 20, the counterweight 21, the impeller 22, the first gear 23, the second gear 24, the synchronizing wheel 25, the synchronous belt 26, the fixed plate 27, the metal spring 28, the movable plate 29, the rack 30, the twisting gear 31, the baffle 32, the contact 33, and the like are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. The pressure relief device for mushroom sterilization comprises a shell (1), and is characterized in that an air inlet pipe (2) is arranged at the lower part of the shell (1), an air outlet pipe (9) is arranged at the upper end of the shell (1), one end, located inside the shell (1), of the air inlet pipe (2) is fixedly communicated with a spiral lower pipe (3), one end, located inside the shell (1), of the air outlet pipe (9) is fixedly communicated with an upper pipe (4), the upper pipe (4) is communicated with the lower pipe (3), and pressure relief assemblies are arranged on the air inlet pipe (2) and the air outlet pipe (9);

casing (1) lateral wall is provided with side box (5), the upper end and the upper tube (4) of side box (5) are connected, the lower extreme of side box (5) is connected with and hides blocking sleeve (14), it establishes the junction at upper tube (4) and lower tube (3) to hide blocking sleeve (14) cover, it is annular gasbag and its upper end and upper tube (4) fixed connection to hide blocking sleeve (14), the upper portion of casing (1) is provided with the bleeder tube (15) of direct and external intercommunication.

2. The mushroom sterilization depressor according to claim 1, wherein a piston plate (6) is connected in the side box (5) in a sealing and sliding manner, a telescopic pipe (7) is fixedly arranged at the upper end of the piston plate (6), the top end of the telescopic pipe (7) is fixedly connected with the inner top of the side box (5), a cavity (41) is arranged on the side wall of the upper pipe (4), the cavity (41) is communicated with the telescopic pipe (7) through a hard pipeline, a communicating pipe (8) is arranged at the top of the side box (5), and the communicating pipe (8) is communicated with the shielding sleeve (14).

3. The pressure relief device for mushroom sterilization according to claim 1, wherein the pressure relief component comprises a pressure relief pipe (10), a compression spring (12) is sleeved outside the pressure relief pipe (10), a gland (11) is fixedly connected to the top of the compression spring (12), the pressure relief pipe (10) at the air inlet pipe (2) is communicated with the air inlet pipe (2), the pressure relief pipe (10) at the air outlet pipe (9) is communicated with the air outlet pipe (9), and the stiffness coefficient of the compression spring (12) at the air inlet pipe (2) is greater than that of the compression spring (12) at the air outlet pipe (9).

4. The pressure relief device for mushroom sterilization according to claim 1, wherein a water supply assembly is arranged on the outer wall of the housing (1), the water supply assembly comprises a water inlet pipe (16) and a water outlet pipe (17), the water inlet pipe (16) is arranged on the upper side wall of the housing (1), the water outlet pipe (17) is arranged on the lower wall of the housing (1), and the water inlet pipe (16) is communicated with an external water source.

5. The pressure relief device for mushroom sterilization according to claim 4, wherein the side wall of the casing (1) is provided with an arc-shaped heat absorption groove (20), the heat absorption groove (20) is matched with a rotation external member, the rotation external member comprises a rotation shaft rotatably connected to an external frame, the rotation shaft is fixedly connected with a plurality of rotation rods (18), each rotation rod (18) is fixedly connected with a heat dissipation sleeve (19), the heat dissipation sleeve (19) and the rotation rod (18) are both hollow structures and are communicated with each other, the rotation shaft is located at the center of an arc-shaped surface of the heat absorption groove (20), and the heat dissipation sleeve (19) is attached to the surface of the heat absorption groove (20) during movement.

6. The pressure relief device for sterilizing mushrooms according to claim 5, wherein the inner wall of the rotating rod (18) is connected with a weight block (21) made of permanent magnetic material in a sealing and sliding manner, the water outlet pipe (17) and the water inlet pipe (16) are both provided with impellers (22), the liquid in the pipeline cannot flow when the impellers (22) do not rotate, and the impeller (22) drives the liquid in the pipeline to flow when rotating.

7. The pressure relief device for sterilizing mushrooms according to claim 6, wherein the surface of the impeller (22) located in the water outlet pipe (17) is embedded with a permanent magnet, the center shaft of the impeller (22) penetrates through the outer wall of the corresponding pipeline, the center shaft of the impeller (22) at the water inlet pipe (16) is fixedly connected with a first gear (23), the first gear (23) is engaged with a second gear (24), the center shafts of the impeller (22) at the second gear (24) and the water outlet pipe (17) are both fixedly connected with a synchronizing wheel (25), and two synchronizing wheels (25) are jointly sleeved with a synchronous belt (26).

8. The pressure relief device for mushroom sterilization according to claim 1, wherein a drain pipe (13) is communicated with the bottom of the air inlet pipe (2) near one side of the lower pipe (3), the drain pipe (13) is an inverted Y-shaped structure with two branch pipes arranged at the bottom, two ports at the bottom of the drain pipe (13) are communicated with the outside, two baffles (32) are arranged in the two branch pipes at the bottom of the drain pipe (13), one baffle (32) is rotatably connected to a lower pipe opening of the branch pipe, the other baffle (32) is rotatably connected to the side wall of the middle part of the branch pipe, the baffles (32) are rotated to be perpendicular to the branch pipes to block the liquid in the branch pipes, and the two baffles (32) in the same branch pipe are perpendicular to each other.

9. The pressure relief device for mushroom sterilization according to claim 8, wherein a central axis of each baffle (32) penetrates through a side wall of the branch pipe and is fixedly connected with a twisting gear (31), two twisting gears (31) at the same branch pipe are jointly engaged with a rack (30), a movable plate (29) is fixedly connected to the rack (30), a baffle (32) is fixedly connected to an outer wall of the branch pipe, a metal spring (28) is fixedly connected to the baffle (32) and the movable plate (29) together, two metal contacts (33) are embedded in an inner wall of the branch pipe, and the two contacts (33) are electrically connected with the metal spring (28) at the corresponding branch pipe.