Anti-blocking aeration equipment and its installation mechanism for chemical industry

Abstract

The invention relates to the technical field of aeration equipment, and discloses an anti-blocking aeration equipment for chemical industry, comprising a main air pipe, an aeration pipe and an aeration mechanism, wherein the aeration mechanism comprises an aeration head, an end cover, a sliding rod and a spring, wherein an annular array of movable grooves are provided inside the aeration head, and a sliding rod is slidably embedded inside the movable groove, and the sliding rod is elastically connected between the spring and the movable groove, and the bottom of the sliding rod is welded to the end cover, and when there is no airflow in the main air pipe, the end cover is fitted to the outlet position of the aeration head; the top end of the main air pipe is rotatably connected with two groups of bracket structures, and the angle and length between the two groups of bracket structures are adjustable; in this scheme, a main air pipe is provided, and a plurality of aeration pipes are evenly distributed on the main air pipe, and the main air pipe is driven by a synchronous belt and a belt groove, so that sewage is stirred during aeration, and the ventilation volume of each aeration pipe is different, and they are lifted from bottom to top in sequence, so as to improve the aeration effect of sewage.

Description

Technical Field

[0001] The invention relates to the field of aeration equipment, in particular to anti-blocking aeration equipment for chemical industry and its installation mechanism. Background Art

[0002] Aeration refers to the process of forcibly transferring oxygen in the air to the liquid for dissolved oxygen by means of aeration or mechanical agitation, while uniformly mixing the water. Aeration in sewage treatment is the most expensive process in the aerobic biochemical treatment system of sewage. In the aerobic process, its main function is to prevent the suspended body in the pool from sinking and to strengthen the contact between the organic matter in the pool and the microorganisms and dissolved oxygen. According to the test, it is advisable to maintain the dissolved oxygen in the aeration tank at 3-4 mg / L. If the oxygen supply is insufficient, the performance of the activated sludge will be poor, which will lead to a significant decrease in the wastewater treatment effect. Adequate supply must be achieved by aeration equipment. However, the power consumption of aeration equipment generally accounts for 60% to 70% of the total power consumption of sewage treatment. Therefore, it is of great significance to select aeration equipment with low energy consumption and low cost.

[0003] Existing aeration can be classified into the following categories: 1. Mechanical aeration: using mechanical equipment to fully mix the wastewater and sludge in the aeration tank, and to constantly update the liquid level of the mixed liquid, and to contact it with air to increase the dissolved oxygen in the water; this aeration method has simple equipment and convenient maintenance and management, but it consumes a lot of energy, is prone to foam and dead corners, and is difficult to repair. Therefore, it is only common in smaller aeration tanks and has not been widely used; 2. Blast aeration: compressed air aeration, the blower supplies a certain amount of air, and the air is transported through a pipe to the aerator installed at the bottom of the pool, and the air is made to flow through the aerator. The air forms bubbles of different sizes; the bubbles are formed at the outlet of the aerator, rise and flow, and finally burst at the liquid surface. This process plays a role in transferring oxygen to the sewage; the blast aeration generally requires the construction of a blower room and the laying of blast pipes, and the aeration head is easy to be blocked, and the large oxidation pond requires a large power to operate. At the same time, the position of the blast pipe is usually fixed, the contact position of the airflow and the sewage is fixed, the effect of the contact between the sewage and oxygen is limited, and the treatment time is long; therefore, the present invention proposes an anti-blocking aeration device for chemical industry and an installation mechanism thereof to solve the above problems. Summary of the invention

[0004] In order to solve the problems that the aeration head of the existing blast aeration equipment is easily blocked and the position of the pipeline of the aeration device is fixed, the present invention provides an anti-blocking aeration equipment for chemical industry and an installation mechanism thereof.

[0005] The anti-blocking aeration equipment for chemical industry and its installation mechanism provided by the present invention adopt the following technical solutions:

[0006] Anti-blocking aeration equipment for chemical industry, including a main air pipe connected to an external blower, an aeration pipe fixedly connected to the main air pipe, and a plurality of aeration mechanisms evenly distributed at the bottom of the aeration pipe, the aeration mechanism including an aeration head, an end cover, a slide bar and a spring, an annular array of movable grooves are provided inside the aeration head, and a slide bar is slidably embedded inside the movable groove, and the slide bar is elastically connected to the movable groove through the spring, the bottom of the slide bar and the end cover are welded, and when there is no airflow in the main air pipe, the end cover is attached to the outlet position of the aeration head;

[0007] The top end of the main air pipe is rotatably connected with two sets of support structures, and the angle and length between the two sets of support structures are adjustable. The bottom end of the main air pipe is provided with a base for use with the main air pipe.

[0008] Preferably, at least three groups of aeration tubes are provided, and the three groups of aeration tubes are evenly distributed on the outer wall of the air pipe, each of the three groups of aeration tubes is provided with a plurality of aeration tubes, and the aeration tubes penetrate the main air pipe and extend into the interior thereof, and the three groups of aeration tubes from bottom to top are respectively provided with a first through hole, a second through hole and a third through hole on one end located inside the main air pipe, and the diameters of the first through hole, the second through hole and the third through hole decrease successively.

[0009] Preferably, the front view of the base is an inverted T-shaped structure, and a spherical groove is provided on the top of the base, and a dome is provided at the bottom end of the main air pipe to cooperate with the groove, and the groove and the dome are rotatably connected in a fitting manner.

[0010] Preferably, the support structure includes a first swivel and a second swivel, three evenly distributed isolation rings are welded to the top end of the main air pipe, and a number of air guide holes are evenly opened between two adjacent isolation rings, the first swivel and the second swivel are respectively arranged in the gap positions between the three isolation rings from top to bottom, and the inner sides of the first swivel and the second swivel are fixedly connected with sealing strips, and the first swivel and the second swivel are both connected to the main air pipe through a sealing strip and a sealing connection.

[0011] Preferably, two sleeves are centrally symmetrically welded on the outer walls of the first swivel and the second swivel, and the inner sides of the two sleeves are slidably connected with extension rods that are sealed and matched therewith, an air supply duct is opened inside the extension rod, and the output end of the air supply duct is connected to the inner side of the first swivel or the second swivel, the input end is located at the horizontal end surface of the extension rod, and the input ends of the air supply ducts of the extension rods on the first swivel and the second swivel are arranged opposite to each other, and the air supply duct is connected to an external blower.

[0012] Preferably, a belt groove is welded on the outside of the top end of the main air pipe, and a synchronous belt is detachably mounted on the inner side of the belt groove, and two adjacent main air pipes are connected via a synchronous belt transmission.

[0013] The anti-blocking aeration equipment installation mechanism for chemical industry comprises a first rotating ring, a second rotating ring, a sleeve and an extension rod of a bracket mechanism. When the top view surfaces of the extension rods on the first rotating ring and the second rotating ring are overlapped, the two extension rods are fixedly connected to a connecting block 1 or a gas transmission block 1. When the top view surfaces of the first rotating ring and the second rotating ring have an included angle, the four extension rods are respectively fixedly connected to a connecting block 2 or a gas transmission block 2. The gas transmission block 1 and the gas transmission block 2 are both connected to an external blower through a pipeline.

[0014] Preferably, an air groove running through the connecting block 1 is provided on the inner side thereof, and both ends of the air groove are respectively connected to the air delivery channel output ends of the two extension rods; the connecting block 2 is a closed block structure for sealing the air delivery channel ends of the extension rods; the air delivery block 1 includes a rubber block and a connecting section fixedly connected to the rubber block; a T-shaped through groove is provided inside the rubber block and the connecting section, and the vertical section of the through groove is connected to the air delivery channel output end of the extension rod, and the horizontal section is connected to an external blower; the air delivery block 2 includes a rubber block and a connecting section fixedly connected to the rubber block; an L-shaped through groove is provided inside the rubber block and the connecting section, and the vertical section of the through groove is connected to the air delivery channel output end of the extension rod, and the horizontal section is connected to an external blower.

[0015] Preferably, each of the extension rods is welded with fixing plates on both sides of the output end of the gas transmission channel, and the fixing plates are fixedly connected to the connecting block 1, the connecting block 2, the gas transmission block 1 or the gas transmission block 2 through fastening bolts.

[0016] In summary, the present invention includes at least one of the following beneficial technical effects:

[0017] 1. By setting up a main air pipe, and evenly distributing multiple aeration pipes on the main air pipe, the main air pipe is driven by a synchronous belt and a belt groove, so that the sewage can be stirred while aerating. Combined with the different ventilation volumes of each aeration pipe, the ventilation volume is increased from bottom to top, so as to improve the aeration effect of the sewage;

[0018] 2. By elastically connecting the end cap at the end of the aeration head, the cooperation between the end cap and the internal air pressure is used to achieve the blocking of the aeration head when no air is discharged, thereby reducing the occurrence of blockage;

[0019] 3. By rotating the first swivel and the second swivel on the main air pipe, the positions of the two sets of extension rods can be adjusted to adapt to different usage scenarios and enhance the applicability of the device. The extension rods are connected to each other through connecting block 1, connecting block 2, gas transmission block 1 and gas transmission block 2 to achieve stable installation and ensure stable flow of airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is an isometric structural diagram of an embodiment of the invention;

[0021] Figure 2 It is a schematic diagram of the explosion structure of an embodiment of the invention;

[0022] Figure 3 It is a schematic diagram of the assembly structure of an embodiment of the invention;

[0023] Figure 4 is a schematic diagram of the stent deployment structure of an embodiment of the invention;

[0024] Figure 5 It is a schematic diagram of the longitudinal structure of an embodiment of the invention;

[0025] Figure 6 It is a schematic diagram of the structure of the gas transmission block of an embodiment of the invention;

[0026] Figure 7 is a schematic diagram of the connection block structure of an embodiment of the invention;

[0027] Figure 8 It is a schematic diagram of the cross-sectional structure of an aeration head according to an embodiment of the invention.

[0028] Explanation of the reference numerals: 1. base; 101. groove; 2. main air pipe; 201. dome; 202. air guide hole; 203. isolation ring; 3. aeration pipe; 4. aeration mechanism; 401. aeration head; 402. end cover; 403. movable groove; 404. slide rod; 405. spring; 5. first swivel; 501. sealing strip; 6. second swivel; 7. sleeve; 8. extension rod; 9. connecting block one; 10. gas transmission block one; 1001. rubber block; 1002. connecting section; 1003. through groove; 11. belt groove; 12. synchronous belt; 13. gas transmission channel; 14. fastening bolt; 15. fixing plate; 16. first through hole; 17. second through hole; 18. third through hole; 19. gas transmission block two; 20. connecting block two. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-8 The present invention is described in further detail.

[0030] Example 1: Reference Figure 1-8The anti-blocking aeration equipment for chemical industry comprises a main air pipe 2 connected to an external blower, an aeration pipe 3 is fixedly connected to the main air pipe 2, and a plurality of aeration mechanisms 4 are evenly distributed at the bottom of the aeration pipe 3, the aeration mechanism 4 comprises an aeration head 401, an end cover 402, a slide bar 404 and a spring 405, an annular array of movable grooves 403 are provided inside the aeration head 401, and a slide bar 404 is slidably embedded inside the movable groove 403, and the slide bar 404 is elastically connected to the movable groove 403 through the spring 405, and the bottom of the slide bar 404 is welded to the end cover 402. When there is no airflow in the main air pipe 2, the end cover 402 is attached to the outlet position of the aeration head 401, and the external blower is working. When the blower is in operation, the airflow flows into the main air pipe 2, and is divided in the main air pipe 2, and flows into each group of aeration pipes 3 through the first through hole 16, the second through hole 17 and the third through hole 18 respectively. Under the action of pressure, the airflow flows into different aeration heads 401 in the aeration pipe 3, and breaks open the end cover 402 to flow into the external sewage to oxidize the sewage. When the blower stops operating, the internal air pressure decreases and the end cover 402 cannot be broken open. Under the action of the spring 405, the sliding rod 404 slides toward the inside of the movable groove 403, and finally the end cover 402 is attached and blocked at the end position of the aeration head 401, so as to avoid the external sewage from clogging the aeration head 401 when there is no airflow output;

[0031] At least three groups of aeration pipes 3 are provided, and the three groups of aeration pipes 3 are evenly distributed on the outer wall of the air pipe. Each of the three groups of aeration pipes 3 is provided with a plurality of aeration pipes, and the aeration pipes 3 penetrate the main air pipe 2 and extend to the inside thereof. The three groups of aeration pipes 3 from bottom to top are respectively provided with a first through hole 16, a second through hole 17 and a third through hole 18 on one end located inside the main air pipe 2, and the diameters of the first through hole 16, the second through hole 17 and the third through hole 18 decrease successively. By providing through holes with different diameters, the air flow rate flowing through each group of aeration pipes 3 is affected, ensuring that the air flow rate flowing through the bottom is greater than the air flow rate flowing through the top, thereby ensuring that the sewage in the upper and lower layers has a good oxidation effect;

[0032] The bracket structure includes a first swivel 5 and a second swivel 6. Three evenly distributed isolation rings 203 are welded to the top of the main air pipe 2, and a number of air guide holes 202 are evenly opened between two adjacent isolation rings 203. The first swivel 5 and the second swivel 6 are respectively arranged at the gap positions between the three isolation rings 203 from top to bottom, and the inner sides of the first swivel 5 and the second swivel 6 are fixedly connected with sealing strips 501, and the first swivel 5 and the second swivel 6 are both sealed and rotatably connected to the main air pipe 2 through the sealing strip 501. The upper and lower edges of the air guide holes 202 are matched with the gap between the isolation rings 203 to ensure the sealed connection relationship between the sealing strip 501 and the main air pipe 2. The inner walls of the first swivel 5 and the second swivel 6 are matched with the gap between the outer walls of the main air pipe 2 to ensure the smooth passage between the main air pipe 2 and the external blower. The first swivel 5 and the second swivel 6 are rotatably connected to the main air pipe 2 to achieve adjustable angles between the two, so that the device can be applied to different usage scenarios.

[0033] Two sleeves 7 are welded symmetrically on the outer walls of the first swivel 5 and the second swivel 6, and the inner sides of the two sleeves 7 are slidably connected with extension rods 8 that are sealed and matched therewith. An air delivery channel 13 is opened inside the extension rod 8, and the output end of the air delivery channel 13 is connected to the inner side of the first swivel 5 or the second swivel 6, and the input end is located at the horizontal end surface of the extension rod 8, and the input ends of the air delivery channel 13 of the extension rod 8 on the first swivel 5 and the second swivel 6 are arranged opposite to each other, the air delivery channel 13 is connected to the external blower, the sleeve 7 and the extension rod 8 are slidably connected, and the position between the two is fixedly connected by bolts, so that the length of the bracket structure is adjustable, the application scope of the lifting device, the air delivery channel 13 and the blower The connection arrangement ensures that the external airflow can enter the main air pipe 2 through the air delivery channel 13, and then be discharged by the aeration mechanism 4, so as to realize the aeration treatment of the sewage. A belt groove 11 is welded on the outside of the top of the main air pipe 2, and a synchronous belt 12 is detachably installed on the inner side of the belt groove 11. Two adjacent main air pipes 2 are connected by the synchronous belt 12. One of the main air pipes 2 is connected to the external driving mechanism through the synchronous belt 12, so as to realize the acquisition of power. When the driving mechanism is running, the main air pipes 2 are connected by the synchronous belt 12 to rotate synchronously, so as to stir the sewage while aerating, further improve the contact effect between the airflow and the sewage, so as to improve the treatment effect of the sewage;

[0034] The top end of the main air pipe 2 is rotatably connected with two sets of bracket structures, and the angle and length between the two sets of bracket structures are adjustable. The bottom end of the main air pipe 2 is provided with a base 1 for use therewith. The front view of the base 1 is an inverted T-shaped structure, and a spherical groove 101 is provided on the top of the base 1. The bottom end of the main air pipe 2 is provided with a dome 201 for use with the groove 101. The groove 101 and the dome 201 are fitted and rotatably connected. The groove 101 and the dome 201 of the base 1 cooperate with each other to stabilize the position of the main air pipe 2 and avoid its position displacement during rotation.

[0035] Example 2: Reference Figure 1-8 , the anti-blocking aeration equipment installation mechanism for chemical industry includes a first rotating ring 5, a second rotating ring 6, a sleeve 7 and an extension rod 8 of a bracket mechanism, when the top view of the extension rod 8 on the first rotating ring 5 and the second rotating ring 6 is overlapped, the two extension rods 8 are fixedly connected to a connecting block 9 or a gas transmission block 10, when the top view of the first rotating ring 5 and the second rotating ring 6 has an angle, the four extension rods 8 are respectively fixedly connected to a connecting block 20 or a gas transmission block 2 19, the gas transmission block 10 and the gas transmission block 2 19 are connected to an external blower through a pipeline, and the extension rod There are two situations when the top view of 8 overlaps. One is a single main air pipe 2 structure, and the extension rods 8 are connected to each other through a connecting block 9 to ensure that the airflow will not be output to the outside. The other is that two or more main air pipes 2 need to be connected to each other through the extension rod 8, and the connection block 9 is used to achieve the connection between different main air pipes 2, thereby ensuring the normal delivery of the airflow. When the extension rods 8 do not overlap, the air delivery block 2 19 is used to communicate with the blower, and the connecting block 20 is used to block the ends that do not need to be discharged or inlet.

[0036] The inner side of the connecting block 1 9 is provided with an air groove running through it, and both ends of the air groove are respectively connected to the output ends of the air delivery duct 13 of the two extension rods 8. The connecting block 20 is a closed block structure, which blocks the end of the air delivery duct 13 of the extension rod 8. The air delivery block 10 includes a rubber block 1001 and a connecting section 1002 fixedly connected to the rubber block 1001. T-shaped through grooves 1003 are provided inside the rubber block 1001 and the connecting section 1002, and the vertical section of the through groove 1003 is connected to the output end of the air delivery duct 13 of the extension rod 8, and the horizontal section is connected to the external blower. The air delivery block 2 19 includes a rubber block 1001 and a connecting section 1002 fixedly connected to the rubber block 1001. The rubber block 1001 and the connecting section 1002 are provided with L-shaped through grooves 1003. The through grooves 1003 The vertical section is connected to the output end of the air delivery channel 13 of the extension rod 8, and the horizontal section is connected to the external blower. The through groove 1003 of the air delivery block 19 blocks one side to ensure that the airflow does not overflow, thereby ensuring that the blower airflow can enter the interior of the main air pipe 2 through the air delivery channel 13 of the extension rod 8, and then be transported to each aeration head 401. Each extension rod 8 is located on both sides of the output end of the air delivery channel 13. A fixing plate 15 is welded, and the fixing plate 15 is fixedly connected to the connecting block 1 9, the connecting block 2 20, the air delivery block 10 or the air delivery block 2 19 by a fastening bolt 14. The fastening bolt 14 locks the fixing plate 15 and the connecting block 1 9, the connecting block 2 20, the air delivery block 10 or the air delivery block 2 19 to ensure the sealing effect between each other, thereby ensuring the stability of airflow transportation.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-blocking aeration device for chemical industry, comprising a main air pipe (2) connected to an external blower, an aeration pipe (3) fixedly connected to the main air pipe (2), and a plurality of aeration mechanisms (4) evenly distributed at the bottom of the aeration pipe (3), characterized in that: The aeration mechanism (4) comprises an aeration head (401), an end cover (402), a sliding rod (404) and a spring (405); the aeration head (401) is provided with an annular array of movable grooves (403) inside, and the sliding rod (404) is slidably embedded inside the movable groove (403); the sliding rod (404) is elastically connected to the movable groove (403) through the spring (405); the bottom of the sliding rod (404) and the end cover (402) are welded; when there is no airflow in the main air pipe (2), the end cover (402) is attached to the outlet position of the aeration head (401); The top end of the main air pipe (2) is rotatably connected to two groups of support structures, and the angle and length between the two groups of support structures are adjustable. The bottom end of the main air pipe (2) is provided with a base (1) for use with the main air pipe (2). At least three groups of aeration pipes (3) are provided, and the three groups of aeration pipes (3) are evenly distributed on the outer wall of the air pipe. Each of the three groups of aeration pipes (3) is provided with a plurality of aeration pipes, and the aeration pipes (3) penetrate the main air pipe (2) and extend into the interior thereof. The three groups of aeration pipes (3) from bottom to top are each provided with a first through hole ( 16), a second through hole (17) and a third through hole (18), and the diameters of the first through hole (16), the second through hole (17) and the third through hole (18) are successively reduced; the front view of the base (1) is an inverted T-shaped structure, and a spherical groove (101) is provided on the top of the base (1); a dome (201) used in conjunction with the groove (101) is provided at the bottom end of the main air pipe (2), and the groove (101) and the dome (201) are rotatably connected in a fitting manner; the support structure comprises a first swivel (5) and a second swivel (6), and the top end of the main air pipe (2) is welded Three evenly distributed isolation rings (203) are connected, and a plurality of air guide holes (202) are evenly opened between two adjacent isolation rings (203); the first rotating ring (5) and the second rotating ring (6) are respectively arranged at the gap positions between the three isolation rings (203) from top to bottom, and the inner sides of the first rotating ring (5) and the second rotating ring (6) are fixedly connected with a sealing strip (501), and the first rotating ring (5) and the second rotating ring (6) are sealed and rotatably connected to the main air pipe (2) through the sealing strip (501); the first rotating ring (5) and the second rotating ring (6) are respectively arranged at the gap positions between the three isolation rings (203) from top to bottom, and the inner sides of the first rotating ring (5) and the second rotating ring (6) are fixedly connected with a sealing strip (501) and the main air pipe (2); ) are centrally symmetrically welded to the outer wall of the two sleeves (7), and the inner sides of the two sleeves (7) are slidably connected to the extension rods (8) that are sealed and matched therewith, and an air delivery channel (13) is provided inside the extension rod (8), and the output end of the air delivery channel (13) is connected to the inner side of the first rotating ring (5) or the second rotating ring (6), and the input end is located at the horizontal end surface of the extension rod (8), and the input ends of the air delivery channel (13) of the extension rod (8) on the first rotating ring (5) and the second rotating ring (6) are arranged opposite to each other, and the air delivery channel (13) is connected to an external blower.

2. The anti-blocking aeration equipment for chemical industry according to claim 1, characterized in that: A belt groove (11) is welded on the outside of the top end of the main air pipe (2), and a synchronous belt (12) is detachably mounted on the inner side of the belt groove (11), and two adjacent main air pipes (2) are connected by transmission via the synchronous belt (12).

3. The anti-blocking aeration equipment for chemical industry according to claim 1, characterized in that: The invention comprises a first rotating ring (5), a second rotating ring (6), a sleeve (7) and an extension rod (8) of a support mechanism, characterized in that: when the top surfaces of the extension rods (8) on the first rotating ring (5) and the second rotating ring (6) are arranged to overlap, the two extension rods (8) are fixedly connected to a connection block 1 (9) or a gas transmission block 1 (10); when the top surfaces of the first rotating ring (5) and the second rotating ring (6) have an included angle, the four extension rods (8) are respectively fixedly connected to a connection block 2 (20) or a gas transmission block 2 (19); and the gas transmission block 1 (10) and the gas transmission block 2 (19) are both connected to an external blower through a pipeline.

4. The anti-blocking aeration equipment for chemical industry according to claim 3, characterized in that: The inner side of the connecting block 1 (9) is provided with an air groove which penetrates the connecting block 1, and both ends of the air groove are respectively connected to the output ends of the air delivery channels (13) of the two extension rods (8). The connecting block 2 (20) is a closed block structure which blocks the ends of the air delivery channels (13) of the extension rods (8). The air delivery block 1 (10) comprises a rubber block (1001) and a connecting section (1002) fixedly connected to the rubber block (1001). The rubber block (1001) and the connecting section (1002) have internal openings. A T-shaped through groove is provided, and the vertical section of the through groove is connected to the output end of the gas delivery channel (13) of the extension rod (8), and the horizontal section is connected to an external blower. The gas delivery block 2 (19) comprises a rubber block (1001) and a connecting section (1002) fixedly connected to the rubber block (1001). The rubber block (1001) and the connecting section (1002) are provided with an L-shaped through groove inside. The vertical section of the through groove is connected to the output end of the gas delivery channel (13) of the extension rod (8), and the horizontal section is connected to the external blower.

5. The anti-blocking aeration equipment for chemical industry according to claim 4, characterized in that: Each of the extension rods (8) is welded with fixing plates (15) on both sides of the output end of the gas transmission channel (13), and the fixing plates (15) are fixedly connected to the connection block 1 (9), the connection block 2 (20), the gas transmission block 1 (10) or the gas transmission block 2 (19) via fastening bolts (14).

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