CN216039653U - Constant state control device of stemming - Google Patents

Abstract

The utility model belongs to the technical field of constant state control of stemming, and discloses a constant state control device of stemming.A bracket is fixedly arranged at four corners of the bottom of a belt conveyor; the temperature and humidity control box is fixedly arranged at the upper part of the belt conveyor close to the right end, the lifting door is divided into a first lifting door and a second lifting door, the first lifting door is fixedly arranged on the opening at the left side surface of the box body, and the second lifting door is fixedly arranged on the opening at the right side surface of the box body; the display screen is fixedly arranged at the upper part of the front side face of the box body, the single chip microcomputer is arranged at the lower part of the display screen, and the temperature sensor and the humidity sensor are fixedly connected with the display screen through the single chip microcomputer. The utility model realizes the constant state of the temperature and the humidity of the stemming product, and improves the adaptability of the stemming temperature and the humidity to a stemming machine in the process; the mud gun is easy to strike mud, and the fluctuation of the mud gun striking operation is reduced.

Description

Constant state control device of stemming

Technical Field

The utility model belongs to the technical field of constant state control of stemming, and particularly relates to a constant state control device of stemming.

Background

The stemming consists of refractory aggregate and a bonding agent. The refractory aggregate refers to corundum, mullite, flint clay and other refractory raw materials and coke, mica and other modified materials. The binding agent is organic materials such as water or tar pitch, phenolic resin and the like, and is also added with SiC, Si3N4, an expanding agent, an additive and the like. The aggregate is formed into a matrix according to a certain granularity and weight, and has certain plasticity under the mediation of a binding agent, so that the aggregate can be driven into an iron notch through a mud gun to block molten iron. The stemming is a plastic refractory material for blocking the tapping hole of a steel-making furnace and can be divided into watered stemming and anhydrous stemming, wherein the former is used on a medium and small-sized blast furnace with lower top pressure and low strengthening smelting degree, and the latter is used on a medium and large-sized blast furnace with higher top pressure and high strengthening smelting degree.

After the stemming product is conveyed to a steel furnace site, the stemming storage is not specified, under the condition of severe environment of a tapping site, the temperature, heat radiation, dust and the like of the steel furnace site can influence the state of the stemming, so that the stemming can not keep an ideal constant state of temperature and humidity, and when the stemming with the temperature and the humidity which can not keep the constant state (the hardness of the stemming does not meet the requirements on the process), the stemming is added into a mud gun machine, the stemming work is difficult, the stemming operation is greatly fluctuated, and the blocking of the tapping hole of the steel furnace by the mud gun machine is influenced. The inventor develops a constant state control device of stemming based on the defects in the prior art, and can solve the problems in the prior art.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides a constant state control device for stemming, which has a simple design structure, is scientific and reasonable, and can keep constant temperature and humidity states of stemming products; the utility model solves the problem that the stemming can not keep constant temperature and humidity because the field temperature, heat radiation, dust and the like of the steel-making furnace can influence the state of the stemming.

The technical scheme adopted by the utility model for solving the technical problem is as follows: a constant state control device for stemming comprises a support and a belt conveyor, wherein the support is fixedly arranged at four corners of the bottom of the belt conveyor, the support is used for supporting the belt conveyor, and the belt conveyor is used for conveying stemming blocks to the left end from the right end of the belt conveyor; the temperature and humidity control box is fixedly arranged at the upper part of the belt conveyor close to the right end and comprises a box body, the box body is of a square hollow structure, and an upper cover is arranged at the central position of the upper part of the box body; the temperature sensor is fixedly arranged at the upper part of the left side of the box body close to the rear position, the humidity sensor is fixedly arranged at the front position of the temperature sensor, and the temperature sensor and the humidity sensor extend to the inside of the box body; the steam adjusting device is fixedly arranged in the middle of the upper part in the box body, the fixing plates are fixedly arranged at two sides of the bottom of the steam adjusting device, one end of each fixing plate is fixedly connected with the inner wall of the box body, and the other end of each fixing plate is fixedly connected with the bottom of the steam adjusting device; the opening is fixedly arranged at the lower position in the middle of the front side surface and the rear side surface of the box body and is used for installing a lifting door; the lifting door is divided into a first lifting door and a second lifting door, the first lifting door is fixedly arranged on the opening of the left side surface of the box body, the second lifting door is fixedly arranged on the opening of the right side surface of the box body, and the first lifting door and the second lifting door are automatically opened and closed to realize the entrance or exit of the stemming blocks from the temperature and humidity control box; the display screen is fixed to be set up the leading flank upper portion position of box, the lower part of display screen is provided with the singlechip, temperature sensor and humidity transducer pass through singlechip and display screen fixed connection, the display screen is used for showing temperature sensor and humidity transducer and detects temperature and humidity value.

The belt conveyor comprises a machine frame, the machine frame is of a square structure, a driving roller is fixedly arranged at the left end position of the machine frame 21, a driving shaft is fixed in the center of the driving roller and extends to the outer parts of the front side and the rear side of the left end of the machine frame, and the driving shaft is fixed on the front side and the rear side of the left end of the machine frame through a driving shaft seat; the driven roller is arranged at the right end of the machine frame, the driven shaft is fixed at the center of the driven roller and extends to the outer parts of the front side and the rear side of the right end of the machine frame, and the driven shaft is fixed at the front side and the rear side of the right end of the machine frame through a driven shaft seat; the conveying belt is sleeved between the driving roller and the driven roller.

The upper cover comprises a cover body, the cover body is circular, the handle is fixedly arranged at the center of the cover body, and the handle is used for lifting or putting down the cover body.

Steam adjusting device includes the water tank, and the water tank is upper portion opening, confined square all around, and the apron covers the upper portion position at the water tank, and the louvre evenly sets up on the upper portion of apron, and the louvre is used for diffusing vapor, and the fixed setting of electric rod patchhole is close to the upper portion position on the right side of apron, and the electric rod passes through the electric rod patchhole and inserts it into the water tank, mentions the fixed intermediate position that sets up at the apron of handle, is used for mentioning the apron or put down through mentioning the handle.

The upper part of the electric heating rod is fixedly connected with the control switch and the power supply through a power supply lead; the upper power supply lead of the electric heating rod passes through the upper cover.

The lifting door comprises a pneumatic push rod, the pneumatic push rod is fixedly arranged in the middle of the upper part of the inner side of the left side panel or the right side panel of the box body, the sliding grooves are symmetrically arranged on the front side and the rear side of the opening, and the sliding grooves are vertically arranged; the front side and the rear side of the door body are installed in the sliding groove, the fixed connecting body is fixedly arranged in the middle of the upper portion of the door body, and the telescopic rod of the pneumatic push rod is fixedly connected with the center of the fixed connecting body.

The upper part of the opening is provided with a hollow groove for providing space for the upper part and the lower part of the door body; the width of the open hollow groove is greater than the width of the door body.

The pneumatic push rod is fixedly connected with the air delivery electromagnetic valve of the air compressor through the high-pressure air pipe, and the telescopic rod of the pneumatic push rod pushes the door body to rise or fall up and down along the sliding groove, so that the lifting door is opened and closed.

The use process of the constant state control device of the stemming is as follows: the stemming product is placed in a temperature and humidity control box for temperature and humidity constant state control 1-2 days in advance, and the specific operation process is as follows: firstly, putting stemming products on a right-end conveying belt of a belt conveyor, then starting the belt conveyor, driving a driving shaft to drive a driving roller to rotate under the driving of a driving motor, driving a driven roller to rotate by the driving roller through a conveying belt, enabling the stemming products to move towards the left side along with the rotation of the conveying belt, starting a control switch of a second lifting door when the stemming products move to the position of the second lifting door, enabling a telescopic rod to retract by a pneumatic push rod by taking high-pressure gas as power, lifting a door body upwards through a fixed connecting body when the telescopic rod retracts, enabling the stemming products to enter a temperature and humidity control box from the second lifting door at the moment, then repeating the opposite action of the second lifting door, closing the second lifting door, then starting a control switch of a steam adjusting device electric heating rod, heating water in a water tank by the electric heating rod to generate steam, and diffusing the steam into a box body of the temperature and humidity control box through a heat dissipation hole, the temperature and the humidity of the box body are detected by the temperature sensor and the humidity sensor in real time, observation is carried out through the display screen, and when the temperature and the humidity in the box body reach the humidity and the temperature of the stemming when the stemming operates, heating of the electric heating rod is stopped, so that the stemming product keeps a constant state of the temperature and the humidity. When the mud gun machine needs to block the steel-making furnace, the lifting door of the first lifting door is opened, the first lifting door is opened according to the opening or closing action of the second lifting door, the belt conveyor is opened at the same time, and the stemming products are conveyed to the mud extractor of the mud gun machine by the conveyor belt, so that the mud gun machine can block the steel-making furnace at any time.

The belt conveyor comprises a machine frame, the machine frame is of a square structure, a driving roller is fixedly arranged at the left end position of the machine frame 21, a driving shaft is fixed in the center of the driving roller and extends to the outer parts of the front side and the rear side of the left end of the machine frame, and the driving shaft is fixed on the front side and the rear side of the left end of the machine frame through a driving shaft seat; the driven roller is arranged at the right end of the machine frame, the driven shaft is fixed at the center of the driven roller and extends to the outer parts of the front side and the rear side of the right end of the machine frame, and the driven shaft is fixed at the front side and the rear side of the right end of the machine frame through a driven shaft seat; the conveying belt is sleeved between the driving roller and the driven roller. The main purposes of this arrangement are: through the arrangement of the belt conveyor, on one hand, the automatic conveying of the stemming products can be realized; on the other hand, the shape of the stemming product can be kept, and the stemming product cannot deform due to manual transfer.

The temperature and humidity control box comprises a box body, the box body is of a square hollow structure, and an upper cover is arranged at the center of the upper part of the box body; the temperature sensor is fixedly arranged at the upper part of the left side of the box body close to the rear position, the humidity sensor is fixedly arranged at the front position of the temperature sensor, and the temperature sensor and the humidity sensor extend to the inside of the box body; the steam adjusting device is fixedly arranged in the middle of the upper part in the box body, the fixing plates are fixedly arranged at two sides of the bottom of the steam adjusting device, one end of each fixing plate is fixedly connected with the inner wall of the box body, and the other end of each fixing plate is fixedly connected with the bottom of the steam adjusting device; the opening is fixedly arranged at the lower position in the middle of the front side surface and the rear side surface of the box body, and the opening is used for installing a lifting door. The main purposes of this arrangement are: firstly, the hot steam generated by the steam adjusting device is utilized, on one hand, the temperature in the box body is increased, and therefore the temperature of the stemming product is increased; on the other hand, the humidity in the box body is improved by utilizing the hot steam, so that the humidity of the stemming product is improved. Temperature and humidity in the box can be detected in real time by utilizing the temperature sensor and the humidity sensor, and are displayed in real time through the single chip and the display screen, an operator controls the opening and closing time and the opening and closing time of the steam adjusting device through observing the temperature and the humidity in the box, so that the temperature and the humidity in the box are kept in a constant state, the constant state control of the temperature and the humidity of the stemming product is finally realized, the hardness of the stemming product is kept, and the process temperature and humidity requirements of the stemming used by a mud gun blocking steel refining furnace can be met.

The lifting door is divided into a first lifting door and a second lifting door, the first lifting door is fixedly arranged on the opening of the left side face of the box body, the second lifting door is fixedly arranged on the opening of the right side face of the box body, and the first lifting door and the second lifting door are automatically opened and closed to realize the entrance or exit of the stemming blocks from the temperature and humidity control box. The main purposes of this arrangement are: on one hand, the arrangement of the first lifting door and the second lifting door realizes that stemming products can automatically enter or leave the box body on the belt conveyor; on the other hand, when the first lifting door and the second lifting door are in a closed state, the temperature and humidity control box is sealed, the sealing performance of the temperature and humidity control box is improved, and the temperature and humidity lifting speed in the temperature and humidity control box is increased.

Steam adjusting device includes the water tank, and the water tank is upper portion opening, confined square all around, and the apron covers the upper portion position at the water tank, and the louvre evenly sets up on the upper portion of apron, and the louvre is used for diffusing vapor, and the fixed setting of electric rod patchhole is close to the upper portion position on the right side of apron, and the electric rod passes through the electric rod patchhole and inserts it into the water tank, mentions the fixed intermediate position that sets up at the apron of handle, is used for mentioning the apron or put down through mentioning the handle. The main purposes of this arrangement are: heating water in the water tank by using an electric heating rod to generate steam, and diffusing the steam into the tank body through a radiating hole on the cover plate; on one hand, the temperature in the box body is increased by utilizing steam; on the other hand, the humidity in the box body is improved by utilizing the steam; the combined action of the steam ensures that the stemming product constantly keeps the temperature and the humidity which meet the working requirements of the clay gun, so that the hardness of the stemming product is proper, the clay gun is easy to strike, and the fluctuation of the clay gun striking operation is reduced.

The utility model has the beneficial effects that: the utility model provides a constant state control device for stemming, which has a simple design structure, is scientific and reasonable, and can keep constant temperature and humidity states of stemming products; the constant state of the temperature and the humidity of the stemming product is realized, and the adaptability of the stemming temperature and the humidity to a stemming machine in the process is improved; the mud gun is easy to strike mud, and the fluctuation of the mud gun striking operation is reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a right side cross-sectional view of the steady state control box of the present invention;

FIG. 3 is a top view of the upper cover plate of the steam conditioner of the present invention;

FIG. 4 is a schematic structural view of the lift gate of the present invention;

in the figure, the reference numeral 1, a bracket, 2, a belt conveyor, 21, a machine frame, 22, a driving roller, 23, a driving shaft, 24, a driving shaft seat, 25, a driven roller, 26, a driven shaft, 27, a driven shaft seat, 28, a conveyor belt, 3, a temperature and humidity control box, 31, a box body, 32, an upper cover, 321, a cover body, 322, a handle, 33, a temperature sensor, 34, a humidity sensor, 35, a steam adjusting device, 351, a water tank, 352, a cover plate, 353, a heat dissipation hole, 354, an electric heating rod insertion hole, 355, an electric heating rod, 356, a lifting handle, 36, a fixing plate, 37, an opening, 4, a lifting door, 41, a pneumatic push rod, 42, a sliding groove, 43, a door body, 44, a fixing connector, 5, a lifting door I, 6, a lifting door II, 7, a display screen, 8 and a single chip microcomputer are marked.

Detailed Description

The following detailed description of embodiments of the utility model is provided in connection with the accompanying drawings.

As shown in the figure, the constant state control device for stemming comprises a support 1 and a belt conveyor 2, wherein the support 1 is fixedly arranged at four corners of the bottom of the belt conveyor 2, the support 1 is used for supporting the belt conveyor 2, and the belt conveyor 2 is used for conveying stemming blocks from the right end to the left end of the belt conveyor; the temperature and humidity control box 3 is fixedly arranged at the upper part of the belt conveyor 2 close to the right end, the temperature and humidity control box 3 comprises a box body 31, the box body 31 is of a square hollow structure, and an upper cover 32 is arranged at the center of the upper part of the box body 31; the temperature sensor 33 is fixedly arranged at the upper part of the left side of the box body 31 close to the rear position, the humidity sensor 34 is fixedly arranged at the front position of the temperature sensor 33, and the temperature sensor 33 and the humidity sensor 34 extend to the inner part of the box body 31; the steam adjusting device 35 is fixedly arranged at the middle position of the upper part in the box body 31, the fixing plates 36 are fixedly arranged at the two sides of the bottom of the steam adjusting device 35, one end of each fixing plate 36 is fixedly connected with the inner wall of the box body 31, and the other end of each fixing plate 36 is fixedly connected with the bottom of the steam adjusting device 35; the opening 37 is fixedly arranged at the lower position of the middle of the front side surface and the rear side surface of the box body 31, and the opening 37 is used for installing the lifting door 4; the lifting door 4 is divided into a first lifting door 5 and a second lifting door 6, the first lifting door 5 is fixedly arranged on the opening 37 on the left side surface of the box body 31, the second lifting door 6 is fixedly arranged on the opening 37 on the right side surface of the box body 31, and the first lifting door 5 and the second lifting door 6 are automatically opened and closed by the first lifting door 5 and the second lifting door 6 to realize the entrance or exit of the stemming blocks from the temperature and humidity control box 3; display screen 7 is fixed to be set up the leading flank upper portion position of box 31, the lower part of display screen 7 is provided with singlechip 8, temperature sensor 33 and humidity transducer 34 pass through singlechip 8 and display screen 7 fixed connection, display screen 7 is used for showing temperature sensor 33 and humidity transducer 34 and detects temperature and humidity value.

The belt conveyor 2 comprises a machine frame 21, the machine frame 21 is of a square structure, a driving roller 22 is fixedly arranged at the left end of the machine frame 21, a driving shaft 23 is fixed at the center of the driving roller 22 and extends to the outer parts of the front side and the rear side of the left end of the machine frame 21, and the driving shaft 23 is fixed at the front side and the rear side of the left end of the machine frame 21 through a driving shaft seat 24; the driven roller 25 is arranged at the right end of the machine frame 21, the driven shaft 26 is fixed at the center of the driven roller 25 and extends to the outer parts of the front side and the rear side of the right end of the machine frame 21, and the driven shaft 26 is fixed at the front side and the rear side of the right end of the machine frame 21 through the driven shaft seat 27; the conveyor belt 28 is fitted between the drive roller 22 and the driven roller 25.

The upper cover 32 includes a cover body 321, the cover body 321 is circular, a handle 322 is fixedly disposed at a central position of the cover body 321, and the handle 322 is used for lifting or lowering the cover body 321.

The steam adjusting device 35 comprises a water tank 351, wherein the water tank 351 is square with an open upper part and a closed periphery, a cover plate 352 covers the upper part of the water tank 351, heat dissipation holes 353 are uniformly formed in the upper part of the cover plate 352, the heat dissipation holes 353 are used for diffusing steam, an electric heating rod insertion hole 354 is fixedly formed in the right side of the cover plate 352 and close to the upper part, an electric heating rod 355 is inserted into the water tank 351 through the electric heating rod insertion hole 354, a lifting handle 356 is fixedly arranged in the middle of the cover plate 352, and the lifting handle 356 is used for lifting or lowering the cover plate.

The upper part of the electric heating rod 355 is fixedly connected with the control switch and the power supply through a power supply lead; the upper power supply lead of the electric heating rod 355 passes through the upper cover 32.

The lifting door 4 comprises a pneumatic push rod 41, the pneumatic push rod 41 is fixedly arranged in the middle of the upper part of the inner side of the left side panel or the right side panel of the box body 31, the sliding grooves 42 are symmetrically arranged on the front side and the rear side of the opening 37, and the sliding grooves 42 are vertically arranged; the front and rear sides of the door body 43 are installed in the sliding groove 42, the fixed connecting body 44 is fixedly arranged at the middle position of the upper part of the door body 43, and the telescopic rod of the pneumatic push rod 41 is fixedly connected with the center of the fixed connecting body 44.

A hollow groove is formed at the upper part of the opening 37 and used for providing space for the upper part and the lower part of the door body 43; the width of the hollow groove in the opening 37 is larger than the width of the door body 43.

The pneumatic push rod 41 is fixedly connected with the air delivery electromagnetic valve of the air compressor through a high-pressure air pipe, and the telescopic rod of the pneumatic push rod 41 pushes the door body 43 to rise or fall up and down along the sliding groove 42, so that the lifting door 4 is opened or closed.

The use process of the constant state control device of the stemming is as follows: the stemming product is placed in a temperature and humidity control box 3 for temperature and humidity constant state control 1-2 days in advance, and the specific operation process is as follows: firstly, the stemming product is placed on a right-end conveyor belt 28 of a belt conveyor 2, then the belt conveyor 2 is started, a driving shaft 23 drives a driving roller 22 to rotate under the drive of a driving motor, the driving roller 22 drives a driven roller 25 to rotate through the conveyor belt 28, the stemming product moves towards the left side along with the rotation of the conveyor belt 28, when the stemming product moves to the position of a lifting door II 6, a control switch of the lifting door II 6 is started, a pneumatic push rod 41 takes high-pressure gas as power to enable a telescopic rod to retract, a door body 43 is lifted upwards through a fixed connecting body 44 when the telescopic rod retracts, at the moment, the stemming product enters a temperature and humidity control box 3 from the lifting door II 6, then the opposite actions of the lifting door II 6 are repeated, the lifting door II 6 is closed, then a control switch of an electric heating rod 355 of a steam adjusting device 35 is started, and the electric heating rod 355 heats water in a water tank 351 to generate steam, steam diffuses into the box 31 of the temperature and humidity control box 3 through the heat dissipation holes 353, the temperature and humidity of the box 31 are detected in real time by the temperature sensor 33 and the humidity sensor 34 at the moment, the observation is carried out through the display screen 7, and when the temperature and the humidity in the box 31 reach the humidity and the temperature of stemming during operation of a clay gun, the heating of the electric heating rod 355 is stopped, so that the stemming product is kept in a constant state of temperature and humidity. When the mud gun machine needs to block the steel furnace, the lifting door of the lifting door I5 is opened, the lifting door I5 is opened according to the opening or closing action of the lifting door II 6, the belt conveyor 2 is opened at the same time, and the stemming products are conveyed to the mud extractor of the mud gun machine by the conveyor belt 28 so as to block the steel furnace at any time by the mud gun machine.

Various modifications to the above-described embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (7)

1. A constant state control device for stemming comprises a support and a belt conveyor, wherein the support is fixedly arranged at four corners of the bottom of the belt conveyor, the support is used for supporting the belt conveyor, and the belt conveyor is used for conveying stemming blocks to the left end from the right end of the belt conveyor; the method is characterized in that: the temperature and humidity control box is fixedly arranged at the upper part of the belt conveyor close to the right end and comprises a box body, the box body is of a square hollow structure, and an upper cover is arranged at the central position of the upper part of the box body; the temperature sensor is fixedly arranged at the upper part of the left side of the box body close to the rear position, the humidity sensor is fixedly arranged at the front position of the temperature sensor, and the temperature sensor and the humidity sensor extend to the inside of the box body; the steam adjusting device is fixedly arranged in the middle of the upper part in the box body, the fixing plates are fixedly arranged at two sides of the bottom of the steam adjusting device, one end of each fixing plate is fixedly connected with the inner wall of the box body, and the other end of each fixing plate is fixedly connected with the bottom of the steam adjusting device; the opening is fixedly arranged at the lower position in the middle of the front side surface and the rear side surface of the box body and is used for installing a lifting door; the lifting door is divided into a first lifting door and a second lifting door, the first lifting door is fixedly arranged on the opening of the left side surface of the box body, the second lifting door is fixedly arranged on the opening of the right side surface of the box body, and the first lifting door and the second lifting door are automatically opened and closed to realize the entrance or exit of the stemming blocks from the temperature and humidity control box; the display screen is fixed to be set up the leading flank upper portion position of box, the lower part of display screen is provided with the singlechip, temperature sensor and humidity transducer pass through singlechip and display screen fixed connection, the display screen is used for showing temperature sensor and humidity transducer and detects temperature and humidity value.

2. The steady state control device for stemming according to claim 1, wherein: the belt conveyor comprises a machine frame, the machine frame is of a square structure, a driving roller is fixedly arranged at the left end of the machine frame, a driving shaft is fixed in the center of the driving roller and extends to the outer parts of the front side and the rear side of the left end of the machine frame, and the driving shaft is fixed on the front side and the rear side of the left end of the machine frame through a driving shaft seat; the driven roller is arranged at the right end of the machine frame, the driven shaft is fixed at the center of the driven roller and extends to the outer parts of the front side and the rear side of the right end of the machine frame, and the driven shaft is fixed at the front side and the rear side of the right end of the machine frame through a driven shaft seat; the conveying belt is sleeved between the driving roller and the driven roller.

3. The steady state control device for stemming according to claim 1, wherein: the upper cover comprises a cover body, the cover body is circular, the handle is fixedly arranged at the center of the cover body, and the handle is used for lifting or putting down the cover body.

4. The steady state control device for stemming according to claim 1, wherein: steam adjusting device includes the water tank, and the water tank is upper portion opening, confined square all around, and the apron covers the upper portion position at the water tank, and the louvre evenly sets up on the upper portion of apron, and the louvre is used for diffusing vapor, and the fixed setting of electric rod patchhole is close to the upper portion position on the right side of apron, and the electric rod passes through the electric rod patchhole and inserts it into the water tank, mentions the fixed intermediate position that sets up at the apron of handle, is used for mentioning the apron or put down through mentioning the handle.

5. The steady state control device for stemming according to claim 1, wherein: the lifting door comprises a pneumatic push rod, the pneumatic push rod is fixedly arranged in the middle of the upper part of the inner side of the left side panel or the right side panel of the box body, the sliding grooves are symmetrically arranged on the front side and the rear side of the opening, and the sliding grooves are vertically arranged; the front side and the rear side of the door body are installed in the sliding groove, the fixed connecting body is fixedly arranged in the middle of the upper portion of the door body, and the telescopic rod of the pneumatic push rod is fixedly connected with the center of the fixed connecting body.

6. The steady state control device for stemming according to claim 1, wherein: the upper part of the opening is provided with a hollow groove for providing space for the upper part and the lower part of the door body; the width of the open hollow groove is greater than the width of the door body.

7. The steady state control device for stemming according to claim 5, wherein: the pneumatic push rod is fixedly connected with the air delivery electromagnetic valve of the air compressor through the high-pressure air pipe, and the telescopic rod of the pneumatic push rod pushes the door body to rise or fall up and down along the sliding groove, so that the lifting door is opened and closed.

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