CN216620142U - Ventilation and dehumidification system of factory building engineering dam grouting corridor behind dam - Google Patents
Ventilation and dehumidification system of factory building engineering dam grouting corridor behind dam Download PDFInfo
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- CN216620142U CN216620142U CN202123078511.XU CN202123078511U CN216620142U CN 216620142 U CN216620142 U CN 216620142U CN 202123078511 U CN202123078511 U CN 202123078511U CN 216620142 U CN216620142 U CN 216620142U
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Abstract
The utility model discloses a ventilation and dehumidification system for a grouting gallery of a dam of factory building engineering behind a dam, which comprises a grouting gallery, a dam stairwell, a factory building, a smoke-proof fan room, a communication gallery, a plurality of natural ventilation buried pipes, a pressurized air supply buried pipe, a pressurized air supply fan, a first fire valve, a second fire valve, an electric safety door, a dehumidifier, a linkage electric air valve and a sensor, wherein the grouting gallery is arranged in the communication gallery; according to the humidity value measured by the sensor, whether mechanical air supply is carried out through a pressurized air supply buried pipe and a pressurized air supply fan is determined; on one hand, the utility model ensures that good air flow organization and air quality are formed in the dam grouting gallery through the combined operation of natural ventilation and mechanical ventilation in the grouting gallery; on the other hand, the dam grouting gallery is used as an air inlet channel of the hydropower station workshop, so that the grouting gallery and the hydropower station workshop are integrally ventilated, the hydropower station workshop is ventilated by using the pressurized air supply fan, the pressurized air supply buried pipe and the natural ventilation buried pipe, and the energy consumption of a ventilation air-conditioning system of the hydropower station workshop is reduced.
Description
Technical Field
The utility model relates to the technical field of ventilation and dehumidification of a grouting gallery of a dam of a factory building project behind a dam, and is suitable for ventilation and dehumidification of the grouting gallery of the factory building project behind the dam or the dam with a position close to the arrangement position of the factory building.
Background
The large dam of the hydropower station is usually surrounded by atmosphere, reservoir water, tail water and rock mass, has strong heat storage or cold storage capacity, and has the characteristics of good thermal stability, small temperature change amplitude, higher humidity and the like; the temperature of the dam body of the dam depends on the change of air temperature and water temperature, and the practice proves that the temperature change of the two media is periodic change, and the change characteristics of the two media conform to the law of cosine function; because the dam body has strong heat storage capacity, when the temperature and the water temperature transfer heat into the dam body, the attenuation of temperature amplitude and the delay of time can be formed; considering that the galleries utilized by the ventilation air-conditioning system are generally dam grouting galleries or maintenance galleries which are all positioned at deep positions in a dam body, the influence of the atmospheric temperature change on the wall temperature of the dam body is generally not considered, and the influence of the water temperature change on the wall temperature of the dam body is only considered.
The hydropower station factory building generally mainly utilizes engineering construction holes or specially-arranged ventilation holes as air inlet channels for ventilation of the hydropower station factory building, the air channels are generally very long and are hundreds of meters or even thousands of meters long, and the passing air speed is not high; outdoor inlet air exchanges heat with the rock mass of the tunnel wall, and the annual wave amplitude and the daily wave amplitude of the temperature of inlet air can be reduced; under the condition that the air inlet duct is long enough and the heat exchange is sufficient, the daily amplitude of the air entering the room can be close to zero; the adjusting effect of the underground air inlet duct on the air inlet temperature needs to be fully considered during ventilation and air conditioning design, so that the design capacity of a factory building ventilation and air conditioning system is more in line with the actual situation, the problem that the design capacity of a ventilation air conditioning system is too large and is wasted is avoided, the significance of saving energy and protecting the environment is achieved, and the practical significance is slightly achieved for the sustainable development war in China.
The grouting gallery of the dam is buried deeply and can be used as an air inlet channel of a hydropower station workshop, but the problem of the dampness of the grouting gallery of the dam is a ubiquitous and difficult problem in hydraulic and hydroelectric engineering all the time; as shown in figures 1 and 2, the main structures of the factory building engineering behind the dam comprise a dam A and a factory building 3 behind the dam, a dam grouting gallery 1 is located at a certain depth of the dam A, a plurality of staircases 2 are arranged according to the total length of the dam and descend to the grouting gallery, a smoke-proof fan room 4 of the staircases is arranged at the top B of the dam, and the factory building 3 is arranged at a certain distance and a certain depth at the downstream of the dam.
In actual engineering, the dam grouting gallery is not used as an air inlet channel for ventilating a factory building due to various reasons such as the humidity of the grouting gallery and potential safety hazards of flooding the factory building; in order to solve the problem, the grouting gallery is closely matched with civil engineering and other specialties to avoid or minimize a wet source generated by the grouting gallery; secondly, the heating ventilation professional needs to make a ventilation and dehumidification system design of the grouting gallery, so that the air quality in the gallery is improved, and the grouting gallery is reasonably utilized to form a ventilation air inlet channel of a factory building; the dam grouting gallery is used as an air inlet channel for ventilation of hydropower stations, and ventilation and dehumidification of the dam grouting gallery become problems to be solved urgently at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a ventilation and dehumidification system for a grouting gallery of a dam of a factory building engineering behind the dam, which solves the problem of ventilation and dehumidification of the grouting gallery of the dam, and can be used as an air inlet channel for ventilation of a hydropower station factory building to reduce the energy consumption of a factory building ventilation and air conditioning system.
In order to realize the purpose, the technical scheme of the utility model is as follows:
a ventilation and dehumidification system for a grouting gallery of a dam of a factory building engineering behind a dam comprises the grouting gallery, a dam stairwell and a factory building, and is characterized by further comprising a smoke-proof fan room, a communication gallery, a plurality of natural ventilation buried pipes, a pressurized air supply buried pipe, a pressurized air supply fan, a first fire valve, a second fire valve, a dehumidifier, a linkage electric air valve and a sensor;
the smoke-proof fan house is arranged on the dam crest platform;
the communication gallery is arranged between the plant and the grouting gallery and communicates the plant and the dam grouting gallery;
a plurality of natural ventilation buried pipes are longitudinally distributed along the dam grouting gallery, and each natural ventilation buried pipe extends downwards from the dam crest into the grouting gallery;
the position of the pressurized air supply buried pipe, which is out of the ground, is connected with a pressurized air supply fan, the air outlet section of the pressurized air supply fan is provided with an electric air valve which is linked with the fan, and the position of the pressurized air supply buried pipe, which is out of the ground, and the fan are both positioned in a smoke-proof fan room; the pressurized air supply buried pipe extends into the grouting gallery from the smoke-proof fan house to the outer wall which is tightly close to the staircase;
the pressurized air supply buried pipe is provided with a plurality of branch pipes at intervals at the part close to the outer wall of the staircase, specifically, each branch pipe is arranged at an elevation of two to three layers, the branch pipes penetrate through the wall of the staircase and extend into the staircase, and the tail end of each branch pipe is provided with a second fire damper; the tail end of the pressurized air supply buried pipe extending into the grouting gallery is provided with a first fire damper;
arranging a sensor in the grouting gallery;
the dehumidifier is placed in the slurry filling gallery.
Furthermore, a communicating gallery is arranged between the factory building and the grouting gallery and communicates the factory building with the dam grouting gallery.
Further, the connecting part of the communicating gallery and the grouting gallery is positioned in the middle or the upper part of the grouting gallery.
Further, the communicating gallery is communicated with the plant through an electric safety door.
Further, the electric safety door is arranged at one end, close to the factory building, of the communication corridor.
Further, the top end of the natural ventilation buried pipe is bent.
Further, the bottom end of the natural ventilation buried pipe is positioned at the upper part or the middle part in the grouting gallery.
Further, the first fire damper is a normally open electric fire damper; the second fire prevention valve is the electronic fire prevention valve of normal close.
Further, the sensor is arranged in the grouting gallery and is close to the connection part of the grouting gallery and the communication gallery.
Further, the sensor is an air humidity sensor.
The utility model has the beneficial effects that:
1. a pressurized air supply fan and a pressurized air supply buried pipe on the dam are not frequently used at ordinary times, but are required to be arranged due to fire protection requirements; according to the utility model, a pressurizing air supply system which is not commonly used at ordinary times is used for mechanical ventilation and dehumidification of the grouting gallery, the air humidity sensor is arranged, whether the mechanical ventilation system is started or not is determined according to the data of the air humidity sensor, and the problem of ventilation and dehumidification of the dam grouting gallery is solved under the condition that no civil engineering excavation and ventilation equipment is additionally arranged; meanwhile, natural ventilation and mechanical ventilation in the grouting gallery are operated in a combined mode, so that good air flow organization and air quality are formed in the dam grouting gallery.
2. The dam grouting gallery is used as an air inlet channel of the hydropower station workshop, so that the grouting gallery and the hydropower station workshop are integrally ventilated, the hydropower station workshop is ventilated by using the pressurized air supply fan, the pressurized air supply buried pipe and the natural ventilation buried pipe, and the energy consumption of a ventilation air-conditioning system of the hydropower station workshop is reduced.
Drawings
FIG. 1 is an axonometric view of a ventilation and dehumidification system of a grouting gallery of a dam of a factory building engineering behind a dam.
Fig. 2 is a cross-sectional view of a plant project behind a dam.
In the figure: the dam comprises a dam body A, a dam crest platform B, a tail water platform C, an upstream water level D, a downstream water level E, a grouting gallery 1, a staircase 2, a factory building 3, a smoke-proof fan house 4, a communication gallery 5, a natural ventilation buried pipe 6, a pressurized air supply buried pipe 7, a pressurized air supply fan 8, a first fire-proof valve 9, a second fire-proof valve 10, an electric safety door 11, a dehumidifier 12, a linkage electric air valve 13 and a sensor 14.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described below with reference to the accompanying drawings.
The ventilation and dehumidification system for the dam grouting gallery is suitable for ventilation and dehumidification of a factory building project behind a dam or the dam grouting gallery with the position close to the layout position of the factory building, and meanwhile, the dam grouting gallery is used as an air inlet channel of a hydropower station factory building.
FIG. 1 is an isometric view of a ventilation and dehumidification system of a grouting gallery of a dam of a factory building engineering behind a dam, in which the ventilation system of the factory building 3 is omitted; fig. 2 is a cross-sectional view of the post-dam plant project, and a communication gallery between the dam grouting gallery 1 and the plant 3 is omitted.
In the utility model, the factory building 3 is provided with a ventilation system, so that the factory building 3 forms a certain negative pressure, and air can flow into the factory building 3 through the dam grouting gallery 1.
As shown in fig. 1 and 2, the ventilation and dehumidification system for the grouting gallery of the dam of the factory building engineering behind the dam comprises a grouting gallery 1, a dam staircase 2, a factory building 3, a smoke-proof fan room 4, a communication gallery 5 from the grouting gallery 1 to the hydropower station factory building 3, a plurality of natural ventilation buried pipes 6, a pressurized air supply buried pipe 7, a pressurized air supply fan 8, a first fire valve 9, a second fire valve 10, an electric safety door 11, a dehumidifier 12, a linkage electric air valve 13 and a sensor 14.
The dam grouting gallery 1 is arranged in a dam body A at the upstream of a hydropower station factory building 3, a staircase 2 is arranged according to the total length of the dam, the staircase 2 is arranged from a dam top platform B to the grouting gallery 1, the dam top platform B is higher than an upstream water level D, and the hydropower station factory building 3 is higher than a tail water platform C and a downstream water level E;
the smoke-proof fan house 4 is arranged on the dam crest platform B, is close to the staircase and is used for smoke prevention of the staircase; the communication gallery 5 is positioned between the plant 3 and the dam grouting gallery 1, the plant 3 is communicated with the dam grouting gallery 1, and the joint of the communication gallery 5 and the grouting gallery 1 is positioned in the middle or upper part of the grouting gallery; the natural ventilation buried pipes 6 are steel pipes and are longitudinally distributed along the dam grouting gallery 1, and the distance between every two natural ventilation buried pipes 6 is determined according to the pipe diameter and the actual engineering condition; the natural ventilation buried pipe 6 vertically extends into the grouting gallery 1 from the dam crest downwards, the top end of the natural ventilation buried pipe 6 is positioned above the dam crest of the dam and is communicated with the atmosphere, and the top end of the natural ventilation buried pipe 6 is bent to form a rainproof elbow structure, so that excessive rainwater is not introduced into the grouting gallery 1 even if raining occurs, and the influence of weather conditions on ventilation of the grouting gallery is reduced; the top end of the natural ventilation buried pipe is used as an air inlet of the grouting gallery 1, and air flows to a workshop 3 with relative negative pressure after being cooled and dehumidified by the grouting gallery 1; the bottom of the natural ventilation buried pipe 6 extends to the inside of the grouting gallery 1, and the bottom end of the natural ventilation buried pipe 6 is positioned at the upper part or the middle part in the grouting gallery 1; in addition, the natural ventilation buried pipe 6 can be replaced by a natural ventilation vertical shaft, and the selected buried pipe scheme is not limited by factors such as the attractiveness of a building on the top of the dam, space conditions and the like, so that the implementation is convenient.
The pressurized air supply buried pipe 7 is a steel pipe, the position, out of the ground, of the pressurized air supply buried pipe 7 is connected with a pressurized air supply fan 8, an air outlet section of the pressurized air supply fan 8 is provided with an electric air valve 13 linked with the fan, and the position, out of the ground, of the pressurized air supply buried pipe 7 and the fan 8 are both positioned in the smoke-proof fan room 4; as shown in fig. 1, the pressurized air supply buried pipe 7 extends from the smoke-proof fan house 4 to the grouting gallery 1 vertically and downwards and tightly close to the outer wall of the staircase 2; the part of the pressurized air supply buried pipe 7 close to the outer wall of the staircase is provided with a plurality of branch pipes at intervals, specifically, each branch pipe is arranged at an elevation of two to three layers, each branch pipe penetrates through the wall of the staircase and extends into the staircase, the tail end of each branch pipe is provided with a second fire damper 10, and the second fire damper 10 is a 70 ℃ normally closed electric fire damper; the tail end of the pressurized air supply buried pipe 7 extending into the grouting gallery 1 is provided with a first fire damper 9, and the first fire damper 9 is a 70 ℃ normally open electric fire damper; the normally open or normally closed electric fire-proof valve can be opened or closed in a remote control mode.
One end of the communication gallery 5 close to the plant 3 is provided with a normally open electric safety door 11, the communication gallery 5 is communicated with the plant 3 through the electric safety door 11, and the communication gallery 5 is a civil engineering channel between the grouting gallery 1 and the plant 3.
An air humidity sensor 14 is arranged in the grouting gallery 1, and is particularly arranged at a position close to the connection part of the grouting gallery 1 and the communication gallery 5; the support is fixed on the wall of the communication gallery 5 through expansion bolts, the air humidity sensor 14 is fixed at the joint of the communication gallery 5 and the grouting gallery 1 through the support, and the air humidity value detected by the sensor 14 is used as a judgment condition for judging whether the pressurization air supply fan 8 supplies air mechanically for the grouting gallery 1.
The movable dehumidifier 12 is placed in the grouting gallery 1, the dehumidifiers 12 are longitudinally distributed in the dam grouting gallery, the dehumidifier 12 is automatically turned on and off according to a set humidity limit value, when the relative humidity of air in the grouting gallery is higher than a set high value, the dehumidifier is automatically turned on, and when the relative humidity of air in the grouting gallery is lower than a set low value, the dehumidifier 12 is automatically turned off, so that the air humidity in the grouting gallery is maintained within a certain range and cannot be too high, and the operation energy consumption is reduced; the condensed water of the dehumidifier 12 is discharged to a drainage ditch of the grouting gallery nearby.
The utility model can realize three ventilation operation conditions: firstly, when the ventilation of the grouting gallery 1 and the ventilation of the factory building 3 run jointly, namely the normally open electric safety door 11 is opened, and when the humidity monitored by the air humidity sensor 14 is higher than a set high value, the pressurized air supply fan 8 and the linkage air valve 13 thereof are closed through the automatic control system, mechanical air supply through the dam grouting gallery 1 is stopped, natural air inlet is carried out only through the natural ventilation buried pipe 6 from the grouting gallery 1 to the dam crest B, and outdoor air enters the gallery through the natural ventilation buried pipe 6 and then enters the factory building 3 with micro negative pressure; secondly, when the ventilation of the grouting gallery 1 and the ventilation of the factory building 3 are operated in a combined mode, namely the normally open electric safety door 11 is opened, and when the humidity monitored by the air humidity sensor 14 is lower than a set bottom value, the pressurized air supply fan 8 and the linkage air valve 13 thereof are opened through the automatic control system, mechanical air supply is carried out on the dam grouting gallery 1 through the pressurized air supply buried pipe 7, the ventilation effect of the grouting gallery is enhanced, and outdoor air enters the gallery through the natural ventilation buried pipe 6 and the pressurized air supply buried pipe 7 and then enters the factory building 3 with micro negative pressure; thirdly, when the grouting gallery ventilation and the factory building ventilation system operate independently, namely the normally open electric safety door 11 is closed, the pressurized air supply fan 8 and the linkage air valve 13 of the stairwell are opened, mechanical air supply is carried out on the dam grouting gallery 1 through the pressurized air supply buried pipe 7, the ventilation effect of the grouting gallery 1 is enhanced, and the natural ventilation buried pipe 6 is used as an air exhaust channel or a balance channel of the ventilation system of the grouting gallery 1; in the above three ventilation operation conditions, the mobile dehumidifier 12 in the grouting gallery operates independently according to a set value.
The electric safety door 11 is in a normally open state, the opening and closing of the electric safety door 11 can be remotely controlled in a control room, and the electric safety door 11 can also be manually opened and closed in the hydropower house 3; when the dam or the communication corridor 5 is infiltrated with water, the electric safety door 11 can be closed.
In the ventilation system, when the humidity monitored by the air humidity sensor 14 is lower than a set bottom value, the pressurized air supply fan 8 and the linkage air valve 13 thereof are started through the automatic control system, and the pressurized air supply buried pipe 7 is used for mechanically supplying air to the dam grouting gallery 1, so that the ventilation effect of the grouting gallery 1 is enhanced; and when the humidity monitored by the air humidity sensor 14 is higher than a set high value, closing the pressurized air supply fan 8 and the linkage air valve 13 thereof, and stopping mechanical air supply to the dam grouting gallery 1.
The pressurized air supply fan 8 and the pressurized air supply buried pipe 7 on the dam are not frequently used at ordinary times but are required to be arranged due to fire protection requirements; the utility model uses the pressurized air supply system which is not commonly used at ordinary times for ventilation of the grouting gallery 1 and the plant 3, and reduces the fresh air energy consumption of the ventilation air-conditioning system of the plant.
Finally, it should be noted that: while the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that various changes in the form and details may be made therein without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "upper", "lower", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Claims (9)
1. A ventilation and dehumidification system for a grouting gallery of a dam of a factory building engineering behind a dam comprises the grouting gallery (1), a dam staircase (2) and a factory building (3), and is characterized by further comprising a smoke-proof fan room (4), a communication gallery (5), a plurality of natural ventilation buried pipes (6), a pressurized air supply buried pipe (7), a pressurized air supply fan (8), a first fire valve (9), a second fire valve (10), a dehumidifier (12), a linkage electric air valve (13) and a sensor (14);
the smoke-proof fan house (4) is arranged on the dam crest platform;
the communication gallery (5) is arranged between the plant (3) and the grouting gallery (1) and is used for communicating the plant (3) and the dam grouting gallery (1);
a plurality of natural ventilation buried pipes (6) are longitudinally distributed along the dam grouting gallery (1), and each natural ventilation buried pipe (6) extends downwards from the dam crest into the grouting gallery (1);
the position of the pressurized air supply buried pipe (7) out of the ground is connected with a pressurized air supply fan (8), an air outlet section of the pressurized air supply fan (8) is provided with an electric air valve (13) linked with the fan, and the position of the pressurized air supply buried pipe (7) out of the ground and the fan (8) are both positioned in the smoke-proof fan room (4); the pressurized air supply buried pipe (7) is downwards abutted against the outer wall of the staircase (2) from the smoke-proof fan room (4) and extends into the grouting gallery (1);
a plurality of branch pipes are arranged at intervals on the part of the pressurized air supply buried pipe (7) close to the outer wall of the staircase (2), the branch pipes penetrate through the wall of the staircase and extend into the staircase, and the tail end of each branch pipe is provided with a second fire damper (10); the tail end of the pressurized air supply buried pipe (7) extending into the grouting gallery (1) is provided with a first fire damper (9);
a sensor (14) is arranged in the grouting gallery (1);
the dehumidifier (12) is placed in the grouting gallery (1).
2. The ventilation and dehumidification system for the grouting gallery of the dam of the factory building engineering behind the dam as claimed in claim 1, wherein the connection part of the communication gallery (5) and the grouting gallery (1) is located in the middle or upper part of the grouting gallery (1).
3. The ventilation and dehumidification system of the grouting gallery of the factory building engineering dam behind the dam of claim 1 or 2, characterized in that the communication gallery (5) is communicated with the factory building (3) through an electric safety door (11).
4. The ventilation and dehumidification system of the grouting gallery of the dam of the factory building engineering behind the dam as claimed in claim 3, wherein the electric safety door (11) is arranged at one end of the communication gallery (5) close to the factory building (3).
5. The ventilation and dehumidification system for grouting galleries of post-dam factory building engineering dams of claim 1, characterized in that the top ends of the natural ventilation buried pipes (6) are curved.
6. The ventilation and dehumidification system for grouting gallery of factory building engineering dam behind dam as claimed in claim 1, wherein the bottom end of said natural ventilation buried pipe (6) is located at the upper or middle part of grouting gallery (1).
7. The ventilation and dehumidification system of the grouting gallery of the dam of the factory building engineering behind the dam of claim 1, characterized in that the first fire damper (9) is a normally open electric fire damper; the second fire damper (10) is a normally closed electric fire damper.
8. The ventilation and dehumidification system of the grouting gallery of the dam of the post-dam factory building engineering according to claim 1, characterized in that the sensor (14) is disposed in the grouting gallery (1) near the junction of the grouting gallery (1) and the communication gallery (5).
9. The ventilation and dehumidification system for the grouting gallery of the factory building engineering dam behind the dam as claimed in claim 1, wherein said sensor (14) is an air humidity sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123078511.XU CN216620142U (en) | 2021-12-09 | 2021-12-09 | Ventilation and dehumidification system of factory building engineering dam grouting corridor behind dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123078511.XU CN216620142U (en) | 2021-12-09 | 2021-12-09 | Ventilation and dehumidification system of factory building engineering dam grouting corridor behind dam |
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| Publication Number | Publication Date |
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| CN216620142U true CN216620142U (en) | 2022-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123078511.XU Active CN216620142U (en) | 2021-12-09 | 2021-12-09 | Ventilation and dehumidification system of factory building engineering dam grouting corridor behind dam |
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| CN (1) | CN216620142U (en) |
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2021
- 2021-12-09 CN CN202123078511.XU patent/CN216620142U/en active Active
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