An exhaust hood for acid-base tank

Abstract

The present application relates to the technical field of pollutant capture and purification, and particularly relates to an acid-alkali tank exhaust hood, which comprises a tank body, an air suction assembly, a purification assembly and an air exhaust assembly. The air suction assembly comprises a cover body, an air suction pump, a one-way valve and an air inlet pipe; the purification assembly comprises a purification cylinder, a motor, a cover plate, a connecting assembly and a stirring shaft; and the air exhaust assembly comprises an air outlet cover, a hose, a fixing sleeve and an air outlet pipe. The present application improves the functionality and efficiency of the acid-alkali tank exhaust hood. Firstly, the adjustable air outlet cover angle effectively captures harmful gases and odors, reducing the potential threat to the environment and worker health. Secondly, the special structure of the stirring rod in the purification barrel enables the gas and liquid to fully react, effectively purifying the exhaust gas and further reducing environmental pollution. In addition, the special structure of the stirring rod realizes the functions of convenient disassembly and installation, simplifies the cleaning and maintenance process, and reduces maintenance costs and time consumption.

Description

Technical Field

[0001] This invention relates to the field of pollutant capture and purification technology, and in particular to an exhaust hood for acid and alkali tanks. Background Technology

[0002] In the chemical industry, acid and alkali tanks are commonly used to store and transport acidic and alkaline chemicals. These chemicals often release harmful gases and odors during storage, transportation, and use, which can have serious impacts on the environment and worker health. To address this issue, a common practice is to install exhaust hoods to collect and release the generated harmful gases and odors.

[0003] However, traditional exhaust hoods have some limitations. First, most exhaust hoods have a fixed exhaust angle that cannot be adjusted according to actual conditions, thus potentially failing to effectively capture and expel harmful gases and odors. Second, existing exhaust hoods present certain difficulties in cleaning and maintenance; for example, cleaning the inside of the exhaust hood may require disassembling complex components, which increases the difficulty and cost of maintenance. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention is proposed.

[0005] Therefore, the problem to be solved by the present invention is to improve the angle adjustment and cleaning and maintenance functions of the exhaust hood for acid and alkali tanks, so as to improve the capture efficiency of harmful gases and odors and the ease of use.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an exhaust hood for an acid-base tank, comprising: a tank body with an opening at the top; an air intake assembly including a hood, an air intake pump, a one-way valve, and an air inlet pipe, wherein the hood is disposed at the upper end of the tank body, one end of the air inlet pipe is connected to the hood, the air intake pump is disposed in the middle of the air inlet pipe, the one-way valve is disposed on the air inlet pipe, and the air intake pump is disposed at the end away from the hood; and a purification assembly including a purification cylinder, a motor, a cover plate, and a connecting assembly. A stirring shaft is included, with one end of the purification cylinder connected to the air inlet pipe. A cover plate is disposed on the purification cylinder, and the motor is disposed on the cover plate. One end of the connecting assembly is connected to the output shaft of the motor, and the other end is connected to the stirring shaft. An exhaust assembly includes an exhaust hood, a hose, a fixing sleeve, and an exhaust pipe. The fixing sleeve is disposed on the rear side of the hood. One end of the hose is connected to the fixing sleeve, and the other end is connected to the exhaust hood. One end of the exhaust pipe is connected to the fixing sleeve, and the other end is connected to the purification cylinder.

[0007] As a preferred embodiment of the exhaust hood for the acid and alkali tank of the present invention, the lower end of the exhaust hood is provided with a support rod and a connecting rod, one end of the connecting rod is connected to the exhaust hood and the other end is connected to the fixing sleeve; the upper end of the hood body is provided with a first straight groove, the lower end of the exhaust hood is provided with a second straight groove, and the two ends of the support rod are respectively slidably engaged with the first straight groove and the second straight groove.

[0008] As a preferred embodiment of the exhaust hood for the acid-base tank of the present invention, the connecting assembly includes a terminal and a connector, one end of the terminal is connected to the output end of the motor, and one end of the connector is connected to the stirring shaft.

[0009] As a preferred embodiment of the exhaust hood for the acid and alkali tank of the present invention, the connector includes a housing, a driving block, and hooks, the driving block is disposed inside the housing, and the hooks are evenly distributed on the side wall of the housing; the connector includes a ring platform and a disengaging component, the disengaging component being disposed inside the ring platform.

[0010] In a preferred embodiment of the exhaust hood for the acid-base tank according to the present invention, the housing is provided with a square groove, a spring groove, a first limiting groove, a sliding groove, a through hole, a lug, and a insertion hole. The square groove is radially disposed within the housing, the spring groove is disposed at the upper end of the square groove, the first limiting groove is disposed at the bottom end of the square groove, the sliding groove is disposed on the side wall of the square groove, the through hole is disposed on the side wall of the housing and communicates with the square groove, the lug is disposed at both ends of the through hole, and the insertion hole is disposed at the bottom of the housing. A first spring is disposed within the spring groove, and a first slider is disposed below the first spring. A torsion spring groove is disposed on the inner wall of the lug.

[0011] As a preferred embodiment of the exhaust hood for the acid-base tank according to the present invention, the slide groove is "U"-shaped, including a first horizontal groove, a second horizontal groove, a first vertical groove, and a second vertical groove. The first horizontal groove is located below the second horizontal groove, and the first vertical groove is located outside the second vertical groove. The slide groove has openings at the junctions of the first horizontal groove and the first vertical groove, and at the junctions of the second horizontal groove and the second vertical groove. A second spring and a stop block are provided in the openings. The second spring is located between the stop block and the end face of the opening, and the stop block slides in cooperation with the opening. A first inclined surface is provided at the upper end of the stop block.

[0012] In a preferred embodiment of the exhaust hood for the acid-base tank according to the present invention, the driving block is slidably engaged with the square groove and is provided with a rack, a wedge, a boss, a third spring, a second slider, and a second limiting groove. The rack is located at the end of the driving block, the wedge is located at the lower end of the driving block, the boss is located on both sides of the driving block and slidably engaged with the sliding groove, the third spring is located at the inner end of the driving block, the second slider is located at the end of the third spring and slidably engaged with the first limiting groove, and the second limiting groove is located at the upper end of the driving block and slidably engaged with the first slider.

[0013] As a preferred embodiment of the exhaust hood for the acid and alkali tank of the present invention, the hook is provided with a gear, a baffle, a torsion spring, a telescopic block, a sleeve hole, and a fourth spring. The gear is rotatably engaged with the lug, the baffle is slidably engaged with the torsion spring groove, the torsion spring is disposed between the torsion spring groove and the end face of the baffle, the sleeve hole is disposed at the lower end of the hook, and the fourth spring is disposed between the telescopic block and the end face of the sleeve hole. The telescopic block is slidably engaged with the sleeve hole.

[0014] As a preferred embodiment of the exhaust hood for the acid-base tank of the present invention, the annular platform is provided with a rod groove, a disc groove, and a long groove. The disc groove is disposed inside the annular platform, the rod groove is disposed at the upper end of the annular platform and communicates with the disc groove, and the long groove is disposed on the side of the annular platform and communicates with the disc groove.

[0015] In a preferred embodiment of the exhaust hood for the acid-base tank according to the present invention, the detachment component includes a disc body, a drive rod, a connecting rod, a moving ring, and a fifth spring. The disc body is slidably engaged with the disc groove. The drive rod is disposed at the upper end of the disc body and slidably engaged with the rod groove. The connecting rod connects the disc body and the moving ring and slidably engages with the long groove. The moving ring is disposed on the outer side of the ring platform. The fifth spring is disposed between the upper end of the disc body and the end face of the disc groove.

[0016] The beneficial effects of this invention are as follows: This invention improves the functionality and efficiency of exhaust hoods for acid and alkali tanks. First, the adjustable exhaust hood angle effectively captures harmful gases and odors, reducing potential threats to the environment and worker health. Second, the special structure of the stirring rod inside the purification tank allows for full reaction between gas and liquid, effectively purifying the emitted gas and further reducing environmental pollution. Additionally, the specially structured stirring rod facilitates easy disassembly and installation, simplifying cleaning and maintenance processes and reducing maintenance costs and time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0018] Figure 1 A scene depicting an exhaust hood used for an acid / alkali tank.

[0019] Figure 2 This is an internal diagram of the purification components of an exhaust hood for an acid / alkali tank.

[0020] Figure 3 This is a structural diagram of the connection components for the exhaust hood of an acid-alkali tank.

[0021] Figure 4 This is a cross-sectional view of the connection end of the exhaust hood for the acid and alkali tank.

[0022] Figure 5 This is a diagram showing the connector structure of an exhaust hood for an acid / alkali tank.

[0023] Figure 6 Exploded view of the connection of the exhaust hood for the acid-alkali tank.

[0024] Figure 7 This is a cross-sectional view of the connector of the exhaust hood for the acid and alkali tank.

[0025] Figure 8 A cross-sectional view of the connection assembly for the exhaust hood of the acid / alkali tank. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is mutually exclusive, either alone or selectively, with other embodiments.

[0029] Example 1

[0030] Reference Figure 1 and Figure 2 This is the first embodiment of the present invention. This embodiment provides an exhaust hood for an acid and alkali tank. The exhaust hood for the acid and alkali tank includes a tank body 100, an air suction component 200, a purification component 300, and an exhaust component 500.

[0031] Specifically, the tank body is 100mm long and has an opening at the top;

[0032] The suction assembly 200 includes a cover 201, a suction pump 202, a one-way valve 203, and an air inlet pipe 204. The cover 201 is located at the upper end of the tank 100. One end of the air inlet pipe 204 is connected to the cover 201. The suction pump 202 is located in the middle of the air inlet pipe 204. The one-way valve 203 is located on the air inlet pipe 204. The suction pump 202 is located at the end away from the cover 201.

[0033] The purification component 300 includes a purification cylinder 301, a motor 302, a cover plate 303, a connecting component 400, and a stirring shaft 304. The purification cylinder 301 is connected to one end of the air inlet pipe 204. The cover plate 303 is disposed on the purification cylinder 301, and the motor 302 is disposed on the cover plate 303. One end of the connecting component 400 is connected to the output shaft of the motor 302, and the other end is connected to the stirring shaft 304. When the polluted gas collected by this invention is purified inside the purification cylinder, the motor 302 drives the stirring rod 304 to rotate, so that the gas and liquid react fully, improving the purification process of the polluted gas. The connecting component 400 makes the disassembly of the stirring shaft 304 quicker and more efficient, reducing the difficulty of cleaning and maintenance.

[0034] The exhaust assembly 500 includes an exhaust hood 501, a hose 502, a fixing sleeve 503, and an exhaust pipe 504. The fixing sleeve 503 is located on the rear side of the hood 201. One end of the hose 502 is connected to the fixing sleeve 503 and the other end is connected to the exhaust hood 501. One end of the exhaust pipe 504 is connected to the fixing sleeve 503 and the other end is connected to the purification cylinder 301.

[0035] It is worth noting that the exhaust hood 501 and the hood body 201 are located on the same side of the trough body 100. The air jet of the exhaust hood 501 limits the air intake range of the intake port. This not only makes the exhaust effect reach the same level, but also greatly reduces the required exhaust volume and total air volume.

[0036] Specifically, the lower end of the vent 501 is provided with a support rod 501a and a connecting rod 501b. One end of the connecting rod 501b is connected to the vent 501, and the other end is connected to the fixing sleeve 503. The upper end of the hood 201 is provided with a first straight groove 201a, and the lower end of the vent 501 is provided with a second straight groove 501c. The two ends of the support rod 501a are respectively slidably engaged with the first straight groove 201a and the second straight groove 501c.

[0037] It is worth noting that the support rod 501a, the first straight groove 201a, and the second straight groove 501c are all provided with a fixing structure (this is prior art and is not shown in the figure) to facilitate the fixing of the support rod 501a. The angle of the air hood 501 can be adjusted by moving the position of the support rod 501a.

[0038] In use, the suction pump 202 operates, and the air inlet pipe 204 adsorbs the gas emitted upward from inside the tank 100 through the cover 201. Then, the gas reaches the inside of the purification tank 301 through the one-way valve 203, and then the gas is discharged from the inside of the air outlet pipe 504 and upward from the inside of the air outlet cover 501, thus forming an air curtain. The angle of the top air outlet cover 501 can be changed by adjusting the support rod 501a, thereby improving the pollutant capture efficiency. At the same time, since the top of the tank 100 is open, it is more convenient to put materials into the tank 100. When the gas passes through the inside of the purification tank 301, the stirring rod 304 stirs the liquid inside, so that the polluted gas can react more fully and improve the purification efficiency.

[0039] Example 2

[0040] Reference Figures 2-8 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0041] Specifically, the connector 400 includes a connector 401 and a connector 402. One end of the connector 401 is connected to the output end of the motor 302, and one end of the connector 402 is connected to the stirring shaft 304.

[0042] Specifically, the connector 401 includes a housing 403, a drive block 404, and a hook 405. The drive block 404 is disposed inside the housing 403, and the hooks 405 are evenly distributed on the side wall of the housing 403. The connector 402 includes a ring platform 402a and a disengagement member 402b. The disengagement member 402b is disposed inside the ring platform 402a.

[0043] The detachment member 402b can extend into the connector 401 and drive the drive block 404 to move, thereby engaging the hook 405 with the ring platform 402a. In addition, the detachment member 402b can also prevent the connector 401 and the joint 402 from rotating relative to each other after the connection is completed, so that the stirring shaft 304 can rotate with the motor 302 when it is turned on.

[0044] Specifically, the housing 403 is provided with a square groove 403a, a spring groove 403b, a first limiting groove 403c, a sliding groove 403d, a through hole 403e, a lug 403f, and a socket 403i. The square groove 403a is radially disposed within the housing 403. The spring groove 403b is disposed at the upper end of the square groove 403a. The first limiting groove 403c is disposed at the bottom end of the square groove 403a. The sliding groove 403d is disposed on the side wall of the square groove 403a. The through hole 403e is disposed on the side wall of the housing 403 and communicates with the square groove 403a. The lug 403f is disposed at both ends of the through hole 403e. The socket 403i is disposed below the housing 403. A first spring 403g is disposed within the spring groove 403b. A first slider 403h is disposed below the first spring 403g. A torsion spring groove 403j is disposed on the inner wall of the lug 403f.

[0045] Specifically, the slide 403d is U-shaped and includes a first horizontal groove 403k, a second horizontal groove 403m, a first vertical groove 403n, and a second vertical groove 403p. The first horizontal groove 403k is located below the second horizontal groove 403m, and the first vertical groove 403n is located outside the second vertical groove 403p. Slots 403q are provided at the junctions of the first horizontal groove 403k and the first vertical groove 403n, and at the junctions of the second horizontal groove 403m and the second vertical groove 403p. A second spring 403r and a stop block 403s are provided inside the slot 403q. The second spring 403r is located between the stop block 403s and the end face of the slot 403q, and the stop block 403s slides in conjunction with the slot 403q. A first inclined surface 403t is provided at the upper end of the stop block 403s.

[0046] It is worth noting that the stop block 403s located in the first horizontal groove 403k has its inclined surface 403t facing the direction of the second vertical groove 403p, and the stop block 403s located in the second horizontal groove 403m has its inclined surface 403t facing the direction of the first vertical groove 403n. In the initial state, the second spring 403r is at its original length, and the stop block 403s extends out of the groove 403q.

[0047] Specifically, the drive block 404 is slidably engaged with the square groove 403a and is provided with a rack 404a, a wedge 404b, a boss 404c, a third spring 404d, a second slider 404e, and a second limiting groove 404f. The rack 404a is located at the end of the drive block 404, the wedge 404b is located at the lower end of the drive block 404, the boss 404c is located on both sides of the drive block 404 and is slidably engaged with the sliding groove 403d, the third spring 404d is located at the inner end of the drive block 404, the second slider 404e is located at the end of the third spring 404d and is slidably engaged with the first limiting groove 403c, and the second limiting groove 404f is located at the upper end of the drive block 404 and is slidably engaged with the first slider 403h.

[0048] In the initial state, the first spring 403g and the third spring 404d are at their original lengths. At this time, the boss 404c is located at the lower end of the first vertical groove 403n, and the wedge 404b is aligned with the insertion hole 403i. It is worth noting that when the boss 404c is in the first vertical groove 403n, the rack 404a meshes with the gear 405a.

[0049] Specifically, the hook 405 is provided with a gear 405a, a baffle 405b, a torsion spring 405c, a telescopic block 405d, a sleeve hole 405e, and a fourth spring 405f. The gear 405a is rotatably engaged with the lug 403f, the baffle 405b is slidably engaged with the torsion spring groove 403j, the torsion spring 405c is located between the torsion spring groove 403j and the end face of the baffle 405b, the sleeve hole 405e is located at the lower end of the hook 405, and the fourth spring 405f is located between the telescopic block 405d and the end face of the sleeve hole 405e. The telescopic block 405d is slidably engaged with the sleeve hole 405e.

[0050] In the initial state, the torsion spring 405c is at its original length, and the hook 405 forms an angle with the axis of the housing 403. At this time, the ring platform 402a can be inserted into the space below the hook 405.

[0051] Specifically, the ring platform 402a is provided with a rod groove 402c, a disc groove 402d, and a long groove 402e. The disc groove 402d is located inside the ring platform 402a, the rod groove 402c is located at the upper end of the ring platform 402a and is connected to the disc groove 402d, and the long groove 402e is located on the side of the ring platform 402a and is connected to the disc groove 402d. The rod groove 402c is matched with the socket 403i.

[0052] Specifically, the disengaging component 402b includes a disc body 402f, a drive rod 402g, a connecting rod 402h, a moving ring 402i, and a fifth spring 402j. The disc body 402f is slidably engaged with the disc groove 402d. The drive rod 402g is located at the upper end of the disc body 402f and is slidably engaged with the rod groove 402c. The connecting rod 402h connects the disc body 402f and the moving ring 402i. The connecting rod 402h is slidably engaged with the long groove 402e. The moving ring 402i is located on the outside of the ring platform 402a. The fifth spring 402j is located between the upper end of the disc body 402f and the end face of the disc groove 402d.

[0053] In the initial state, the fifth spring 402j is at its original length. During connection, the drive rod 402g is first aligned with the insertion hole 403i and inserted into the housing 403. Then, the drive rod 402g contacts the wedge block 404b, pressing the drive block 404 upward. Due to the setting of the stop block 403s, the boss 404c can only move in the direction of the first vertical groove 403n, pressing the first spring 403g. At this time, the rack 404a drives the gear 405a to rotate, so that the hook 405 gradually becomes horizontal with the axis of the housing 403. During the upward movement of the connector 402, the rotating hook 405... The lower telescopic block 405d contacts the ring platform 402a and gradually presses into the sleeve hole 405e. When the boss 404c moves to the upper end of the first vertical groove 403m, the hook 405 is parallel to the axis of the housing 403, and the telescopic block 405d just passes the ring platform 402a. Under the action of the fourth spring 405f, the telescopic block 405d extends to below the ring platform 402a and engages with it. At this time, the connector 401 and the joint 402 are engaged. When it is necessary to separate them, simply move the moving ring 402i upwards. At this time, the fifth spring 402j is compressed, driving... The moving rod 402g continues to press the wedge block 404b. Due to the restriction of the slide groove 403d, the driving block 404 can no longer move upwards and can only retract into the square groove 403a to press the third spring 404d. The boss 404c moves within the second transverse groove 403m. When the boss 404c moves to the upper position of the second vertical groove (during this process, the boss 404c will press the inclined surface 403t of the stop block 403s, pressing it into the groove 403q; when the boss 404c moves to the upper end of the second vertical groove, under the action of the second spring 403r, the stop block 403s re-extends from the groove 403q), The rack 404a disengages from the gear 405a. Under the action of the torsion spring 405c, the hook 405 resets. At this time, the connector 401 can be separated from the end 402. After the pressure of the drive rod 402g is removed, the drive block 404 is subjected to the elastic force of the first spring 403g and the third spring 404d. Due to the setting of the stop block 403s, the boss 404c can only move downward along the direction of the second vertical groove 403p. When it moves to the lower end of the second vertical groove 403p, the first spring 403g returns to its original length, and the boss 404c moves along the first horizontal groove 403k, thereby completing the reset.

[0054] When in use, simply align the drive rod 402g with the insertion hole 403i and insert it into the housing 403 to complete the connection between the stirring shaft 304 and the motor 301 shaft. When disengaging, simply move the moving ring 402i upwards to complete the disengagement and reset of the connection end 401.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An exhaust hood for an acid-base tank, characterized in that: include, The tank (100) has an opening at the top; The suction assembly (200) includes a cover (201), a suction pump (202), a one-way valve (203), and an air inlet pipe (204). The cover (201) is located at the upper end of the groove (100). One end of the air inlet pipe (204) is connected to the cover (201). The suction pump (202) is located in the middle of the air inlet pipe (204). The one-way valve (203) is located on the air inlet pipe (204). The suction pump (202) is located at the end away from the cover (201). The purification component (300) includes a purification cylinder (301), a motor (302), a cover plate (303), a connecting component (400), and a stirring shaft (304). The purification cylinder (301) is connected to one end of the air inlet pipe (204). The cover plate (303) is disposed on the purification cylinder (301). The motor (302) is disposed on the cover plate (303). One end of the connecting component (400) is connected to the output shaft of the motor (302), and the other end is connected to the stirring shaft (304). The exhaust assembly (500) includes an exhaust hood (501), a hose (502), a fixing sleeve (503), and an exhaust pipe (504). The fixing sleeve (503) is located on the rear side of the hood (201). One end of the hose (502) is connected to the fixing sleeve (503), and the other end is connected to the exhaust hood (501). One end of the exhaust pipe (504) is connected to the fixing sleeve (503), and the other end is connected to the purification cylinder (301). The connecting assembly (400) includes a terminal (401) and a connector (402). One end of the terminal (401) is connected to the output end of the motor (302), and one end of the connector (402) is connected to the stirring shaft (304). The connector (401) includes a housing (403), a drive block (404), and hooks (405). The drive block (404) is disposed inside the housing (403), and the hooks (405) are evenly distributed on the side wall of the housing (403). The connector (402) includes a ring platform (402a) and a disengaging element (402b), wherein the disengaging element (402b) is disposed within the ring platform (402a); The housing (403) is provided with a square groove (403a), a spring groove (403b), a first limiting groove (403c), a sliding groove (403d), a through hole (403e), a lug (403f), and a socket (403i). The square groove (403a) is radially disposed within the housing (403). The spring groove (403b) is disposed at the upper end of the square groove (403a). The first limiting groove (403c) is disposed at the bottom end of the square groove (403a). The sliding groove (403d) is disposed on the side wall of the square groove (403a). The through hole (403e) is disposed on the side wall of the housing (403) and communicates with the square groove (403a). The lug (403f) is disposed at both ends of the through hole (403e). The socket (403i) is disposed below the housing (403). A first spring (403g) is provided in the spring groove (403b), and a first slider (403h) is provided below the first spring (403g). The inner wall of the lug (403f) is provided with a torsion spring groove (403j); The slide (403d) is "U" shaped and includes a first horizontal groove (403k), a second horizontal groove (403m), a first vertical groove (403n), and a second vertical groove (403p). The first horizontal groove (403k) is located below the second horizontal groove (403m), and the first vertical groove (403n) is located outside the second vertical groove (403p). The chute (403d) is provided with a groove (403q) at the junction of the first horizontal groove (403k) and the first vertical groove (403n) and at the junction of the second horizontal groove (403m) and the second vertical groove (403p). A second spring (403r) and a stop block (403s) are provided inside the slot (403q). The second spring (403r) is disposed between the stop block (403s) and the end face of the slot (403q). The stop block (403s) and the slot (403q) are in sliding engagement. The upper end of the stop (403s) is provided with a first inclined surface (403t); The driving block (404) is slidably engaged with the square groove (403a) and is provided with a rack (404a), a wedge (404b), a boss (404c), a third spring (404d), a second slider (404e), and a second limiting groove (404f). The rack (404a) is located at the end of the driving block (404), the wedge (404b) is located at the lower end of the driving block (404), the boss (404c) is located on both sides of the driving block (404) and is slidably engaged with the sliding groove (403d), the third spring (404d) is located at the inner end of the driving block (404), the second slider (404e) is located at the end of the third spring (404d) and is slidably engaged with the first limiting groove (403c), and the second limiting groove (404f) is located at the upper end of the driving block (404) and is slidably engaged with the first slider (403h). The ring platform (402a) is provided with a rod groove (402c), a disc groove (402d), and a long groove (402e). The disc groove (402d) is disposed inside the ring platform (402a). The rod groove (402c) is disposed at the upper end of the ring platform (402a) and communicates with the disc groove (402d). The long groove (402e) is disposed on the side of the ring platform (402a) and communicates with the disc groove (402d). The disengaging component (402b) includes a disc body (402f), a drive rod (402g), a connecting rod (402h), a moving ring (402i), and a fifth spring (402j). The disc body (402f) is slidably engaged with the disc groove (402d). The drive rod (402g) is disposed at the upper end of the disc body (402f) and is slidably engaged with the rod groove (402c). The connecting rod (402h) connects the disc body (402f) and the moving ring (402i). The connecting rod (402h) is slidably engaged with the long groove (402e). The moving ring (402i) is disposed on the outside of the ring platform (402a). The fifth spring (402j) is disposed between the upper end of the disc body (402f) and the end face of the disc groove (402d).

2. The exhaust hood for acid and alkali tanks as described in claim 1, characterized in that: The lower end of the vent hood (501) is provided with a support rod (501a) and a connecting rod (501b). One end of the connecting rod (501b) is connected to the vent hood (501), and the other end is connected to the fixing sleeve (503). The upper end of the cover (201) is provided with a first straight groove (201a), and the lower end of the air vent (501) is provided with a second straight groove (501c). The two ends of the support rod (501a) are respectively slidably engaged with the first straight groove (201a) and the second straight groove (501c).

3. The exhaust hood for acid and alkali tanks as described in claim 2, characterized in that: The hook (405) is provided with a gear (405a), a baffle (405b), a torsion spring (405c), a telescopic block (405d), a sleeve hole (405e), and a fourth spring (405f). The gear (405a) is rotatably engaged with the lug (403f), the baffle (405b) is slidably engaged with the torsion spring groove (403j), the torsion spring (405c) is disposed between the end face of the torsion spring groove (403j) and the baffle (405b), the sleeve hole (405e) is disposed at the lower end of the hook (405), and the fourth spring (405f) is disposed between the end face of the telescopic block (405d) and the sleeve hole (405e). The telescopic block (405d) is slidably engaged with the sleeve hole (405e).

Images