CN210291399U - Thin oil sealed gas tank - Google Patents

Abstract

The utility model discloses a thin oil canned type gas chamber, gas chamber constitute the space of storage coal gas by the cabinet body, cabinet top, cabinet bottom plate, the internal piston that moves along the vertical direction of internal wall of cabinet that is equipped with of cabinet, the gas pipe is connected to the cabinet bottom plate, gas pipe between gas chamber and the 2# valve is connected with communicating pipe one end, the other end connection cabinet body of communicating pipe diffuses the pipe, be equipped with the 5# valve on communicating pipe, internal wall of cabinet is located piston stroke upper limit position and is equipped with first proximity sensor, the utility model discloses piston oil ditch oil level descends when effectively having solved the cabinet body and diffusing, and sealed inefficacy between piston and the cabinet body board, coal gas overflow piston upper portion, meets the problem that the spark extremely easily takes place the explosion accident to simple structure is reliable, the expense is very little, the dimension is examined conveniently, durable.

Description

Thin oil sealed gas tank

Technical Field

The utility model relates to a coal gas storage tank field.

Background

The gas storage amount is an important parameter for the safe operation of the gas holder, and the storage amount is required to be not more than 90% of the rated storage amount and not less than 10% of the rated storage amount in the operation management, namely the safe capacity of the gas holder. An overrun above or below the specified value is determined.

The thin oil sealed gas chamber consists of mainly bottom plate, chamber, piston, sealing unit, arched top with central ventilating clerestory, support, upright post and corridor. A piston capable of moving up and down is arranged in the cylindrical cabinet body, and coal gas enters and exits from the bottom of the gas cabinet and is stored in a space formed by the bottom plate, the side plate and the piston. The gas stored in the gas holder can reach the required working pressure by adding a balance weight on the piston. When the gas quantity in the plant gas main pipe is increased and the pressure of the gas main pipe is higher than the working pressure of the gas holder, the gas enters the gas holder to push the piston to rise; when the pressure of the gas main pipe is lower than the pressure of the gas holder, the piston descends to send the gas into a plant area pipe network. Thus, the gas cabinet plays a role in automatically balancing the pressure of the whole plant gas pipe network, and is beneficial to stable combustion of gas users.

In order to prevent the piston from leaking gas when moving up and down, a sealing device is arranged between the piston and the side wall. The sealing oil with a certain height is kept in the oil groove (namely the piston oil groove) of the sealing device, thereby playing the role of sealing the gas. The sealing oil is used in a self-sealing and circulating manner, so that the long-term and stable operation of the oil washing sealed gas tank is ensured.

In order to ensure the safe operation of the gas holder and prevent the piston from the accident of ultra-high limit and even roof fall (the piston impacts the top of the holder), the thin oil sealed gas holder is provided with two sets of diffusing devices in front of the gas holder and in the holder body. At 20 ten thousand meters³For example, as shown in fig. 1, a thin oil sealed gas holder is a polygonal cylinder, the diameter of an circumscribed circle is 53.629m, the total height is 106.68m, the piston stroke is 89.56m, and a gas holder inlet/outlet (shared) pipe is provided with a # 1 valve and a # 2 valve, wherein the # 1 valve is a cut-off valve used for cutting off a gas holder from a plant pipe network channel, and the # 2 valve is an adjusting valve used for adjusting the gas holder inlet and outlet amount; the front diffusing pipe of the cabinet is directly connected with the inlet/outlet pipe of the gas cabinet, the interface is arranged between the No. 1 and No. 2 valves, and the 3 valve and the No. 4 valve are arranged, wherein the No. 3 valve is a front diffusing stop valve of the cabinet, and the No. 4 valve is a diffusing amount regulating valve. In the operation process, 4 valves are all in an 'automatic' state. The storage capacity of the gas holder is more than 18 ten thousand meters³The 1# valve is automatically closed, and the 3# valve is automatically opened; the reserve volume continues to rise and is more than 19 km³And meanwhile, the pressure of the pipe network is greater than the pressure in the cabinet by 0.2kPa, the 4# valve is automatically opened, the coal gas in the cabinet is discharged, and the storage volume is closed after being reduced to the safe storage volume. In order to prevent piston ultrahigh position and roof collapse accidents caused by refusal of 1# and 3-4 # valves due to instrument control and electrical faults, 6 square diffusing pipes with 350mm and 350mm are arranged at the upper part of a side plate of the gas holder, and the reserve amount reaches 20 ten thousand meters³When the piston rises to reach the lower edge of the square diffusing pipe connector, the gas in the gas holder can be discharged from the lower edge of the square diffusing pipe connector, so that the gas holder can safely operate.

The security measures have obvious defects and threaten the safe operation and personal safety of the gas holder:

1. the No. 1 and No. 3-4 valves can be rejected due to instrument control and electrical faults, so that the reserve volume is over-limited and the over-limited gas cannot be discharged in time.

2. Just can launch when 1#, 3 ~ 4# valve function failure is diffused to the cabinet body, and when the gas holder reserves transfinites, the piston height reaches the diffusion mouth of pipe:

a) the sealing oil can be brought out quickly along with the airflow, so that the oil stain on the periphery is wet and slippery, the environment is seriously polluted, and meanwhile, the personnel can fall down;

b) the oil level of the piston oil groove can be quickly reduced due to the loss of sealing oil, the sealing between the piston and the cabinet body plate is failed, and gas overflows to the upper part of the piston, so that the explosion accident is easily caused when the gas meets sparks;

c) the cross section of 6 350mm nozzle channels is only 0.26m²Far below 6.91m of inlet/outlet main pipe of gas holder DN2200²And the circulation capacity is insufficient, and the 1# valve and the 3-4 # valve are not enough to avoid the roof fall accident of the piston when the functions of the valves fail.

Obviously, the prior front and cabinet body diffusing devices of the thin oil sealed gas cabinet are obviously insufficient as security equipment for preventing the ultrahigh limit and even roof fall accidents of the gas cabinet.

Disclosure of Invention

The utility model aims to solve the technical problem that realize that a simple, reliable thin oil canned type gas chamber reserves superelevation limit is judged and processing apparatus, replaces the cabinet body and diffuses the function, improves the security personnel level that prevents gas chamber superelevation limit or even roof fall accident.

In order to realize the purpose, the utility model discloses a technical scheme be: a thin oil sealed gas chamber is composed of a chamber body, a chamber top and a chamber bottom plate, a piston moving along the vertical direction of the inner wall of the cabinet body is arranged in the cabinet body, the bottom plate of the cabinet is connected with a gas pipe, the gas pipe is connected with a gas main pipe, the gas pipe is sequentially provided with a No. 2 valve and a No. 1 valve from a gas chamber to the gas main pipe, the gas pipe between the No. 1 valve and the No. 2 valve is communicated with the front diffusing pipe of the gas cabinet, the gas pipe between the gas cabinet and the No. 2 valve is connected with one end of the communicating pipe, the other end of the communicating pipe is connected with a diffusing pipe of the cabinet body, the communicating pipe is provided with a 5# valve, the 5# valve is connected with a signal output end of a processor for driving the 5# valve to be opened and closed through a signal wire, the inner wall of the cabinet body is provided with a first proximity sensor at the upper limit position of the piston stroke, and the first proximity sensor is connected with the signal input end of the processor through a signal line.

And a second proximity sensor fixed on the inner wall of the cabinet body is arranged below the first proximity sensor, and the second proximity sensor is connected with a signal input end of the processor through a signal line.

The first proximity sensor is provided with three and is arranged at the same height position in the cabinet body, and the second proximity sensor is also provided with three and is arranged at the same height position in the cabinet body.

Be equipped with 3# valve and 4# valve on the pipe of diffusing before the cabinet, pipe and gas pipe connection end are diffused before the cabinet to 3# valve and 4# valve to and diffuse before the cabinet between pipe and the communicating pipe hookup location.

The utility model discloses the cancellation cabinet body diffuses, and the pipe is diffused in newly-increased bypass, utilizes proximity sensor to detect the piston position and exceeds the high limit, for instrument control such as preventing proximity sensor, electric component trouble cause misjudgement, valve malfunction, has set up three proximity switch and has joined in marriage a received signal, optimizes on controlling like this, sets for at least receiving 2 proximity sensor signals as controlling, just triggers the protection interlocking.

The emergency diffusing device valve selects a power source different from the 1# and 3-4 # valves, and if the emergency diffusing device is pneumatic, the action of the valve under the power-off condition can be ensured. The invention and the front-end diffusion of the gas holder complete the judgment and the processing control of the gas holder gas storage capacity exceeding the limit, and ensure that the gas holder gas storage capacity does not exceed the limit.

Therefore, the invention has the following advantages:

1. the reliable emergency relief device for the gas holder is provided, and the problems that the storage capacity is over-limited and the over-limited gas cannot be discharged in time due to the failure of the 1# valve and the 3-4 # valves caused by instrument control and electrical faults are solved;

2. the problems that the environment is polluted, the ground is wet and slippery and the safety of operators is threatened due to the fact that sealing oil is carried out when the cabinet body is diffused are effectively solved;

3. the problems that when the cabinet body is diffused, the oil level of the piston oil groove is lowered, the sealing between the piston and the cabinet body plate is invalid, coal gas overflows to the upper part of the piston, and burning and explosion accidents are easily caused when sparks happen are effectively solved;

4. the structure is simple and reliable, the cost is low, the maintenance is convenient, and the device is durable;

5. the inspection is convenient, and only a small metal sheet needs to be slowly close to the proximity sensor to observe whether the state display and alarm of the computer monitoring picture are normal or not. (ii) a

6. The economy is good.

Drawings

The following brief descriptions of the contents expressed by each figure and the marks in the figures in the specification of the present invention are as follows:

FIG. 1 is a schematic diagram of a prior art gas cabinet configuration;

FIG. 2 is a schematic view of the gas chamber of the present invention;

the labels in the above figures are: 1. a cabinet body; 2. a gas pipe; 3. a front cabinet diffusing pipe; 4. a cabinet body blow-off pipe; 5. a communicating pipe; 6. a first proximity sensor; 7. a second proximity sensor; 8. a processor; 9. and displaying an alarm unit.

Detailed Description

The following description of the embodiments with reference to the drawings is intended to illustrate the present invention in further detail, such as the shapes and structures of the components, the mutual positions and connections between the components, the functions and working principles of the components, the manufacturing process, and the operation and use methods, etc., so as to help those skilled in the art understand the present invention more completely, accurately and deeply.

As shown in fig. 2, the gas holder is composed of a holder body 1, a holder top and a holder bottom plate, a gas storage space is formed in the holder top, a holder body diffusion pipe 4 is omitted, a piston moving along the vertical direction of the inner wall of the holder body 1 is arranged in the holder body 1, the holder bottom plate is connected with the gas storage space 2, in order to control the stroke of the piston and avoid accidents, a first proximity sensor 6 is arranged at the upper limit position of the stroke of the piston on the inner wall of the holder body 1, and a second proximity sensor 7 fixed on the inner wall of the holder body 1 is arranged below the inner wall of the holder body, if the first proximity sensor 6 is 19.0³When the piston is at the position corresponding to the board of the cabinet body 1, the second proximity sensor 7 is in the solid internal gasThe volume is 18.5 ten thousand meters³In order to ensure the working reliability of the cabinet, the first proximity sensors 6 are provided with three same height positions arranged in the cabinet body 1, the second proximity sensors 7 are also provided with three same height positions arranged in the cabinet body 1, and the 3 proximity sensors are evenly distributed for 360 degrees.

Gas pipe 2 connects the gas house steward, gas pipe 2 is equipped with 2# valve and 1# valve by the gas chamber to the gas house steward direction in proper order, 2 and the preceding diffusion pipe 3 intercommunications of gas pipe between 1# valve and the 2# valve, 2 and 5 one end connections of communicating pipe of gas pipe between gas chamber and the 2# valve, diffusion pipe 4 is connected to the other end of communicating pipe 5 cabinet body, be equipped with 3# valve and 4# valve before the cabinet on the diffusion pipe 3, 3# valve and 4# valve are diffused pipe 3 and 2 links of gas pipe before the cabinet, and diffuse between pipe 3 and 5 hookup location of communicating pipe before the cabinet, be equipped with 5# valve on communicating pipe 5.

The four valves originally have a driving device, namely the processor 8, a port can be additionally arranged for the processor 8 to control the 5# valve, the 5# valve is connected with a signal output end of the processor 8 used for driving the 5# valve to be opened and closed through a signal line, the first proximity sensor 6 is connected with a signal input end of the processor 8 through a signal line, and the second proximity sensor 7 is connected with a signal input end of the processor 8 through a signal line and used for transmitting signals to the processor 8.

The working principle of the original 1# valve-4 # valve is unchanged, and the storage capacity of the gas holder normally runs at 2-18 km³In the range, the piston is interlocked with the running speed of the piston, the pressure in the cabinet, the pressure of the air inlet pipe and the air outlet pipe and the storage capacity, so that the automatic handling of the gas cabinet is realized, and the pressure of a pipe network is stabilized. In the operation process, 4 valves are all in an 'automatic' state. The storage capacity of the gas holder is more than 18 ten thousand meters³The 1# valve is automatically closed, and the 3# valve is automatically opened; the reserve volume continues to rise and is more than 19 km³And meanwhile, the pressure of the pipe network is greater than the pressure in the cabinet by 0.2kPa, the 4# valve is automatically opened, the coal gas in the cabinet is discharged, and the storage volume is closed after being reduced to the safe storage volume.

The piston moves up and down along with the gas throughput, the proximity sensor is connected to the processor 8 through a control cable, and the working power supply is taken from a direct-current signal power supply of the control system. When the pistons respectively move to the positions of the proximity sensors, the pistons and the proximity sensors generate physical induction, the proximity sensors convert induction signals into electric signals, and the electric signals are amplified by the circuit to generate a switching value signal to the processor 8. The controller can also be provided with a display alarm unit 9, and the 5# valve is displayed, alarmed and controlled in the display alarm unit 9.

The present invention has been described above with reference to the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments described above, and that the invention is not limited to the specific embodiments described above, but rather is intended to cover various insubstantial modifications of the inventive method and solution, or its application to other applications without modification.

Claims (4)

1. The utility model provides a thin oil canned type gas chamber, the gas chamber comprises the space of storage coal gas by the cabinet body, cabinet top, cabinet bottom plate, the internal piston that is equipped with along the vertical direction motion of cabinet internal wall of cabinet, the gas pipe is connected to the cabinet bottom plate, the gas pipe is connected the coal gas house steward, the gas pipe is equipped with 2# valve and 1# valve by the gas chamber in proper order to the coal gas house steward direction, the gas pipe between 1# valve and the 2# valve is with the preceding pipe intercommunication that diffuses of cabinet, its characterized in that: the utility model discloses a gas tank, including the cabinet body, the cabinet body is connected with the cabinet body, the gas pipe between gas chamber and the 2# valve is connected with communicating pipe one end, the other end of communicating pipe is connected the cabinet body and is diffused the pipe, be equipped with the 5# valve on communicating pipe, the signal output part that the 5# valve passing signal line connection is used for driving the treater of 5# valve switch, the internal wall of cabinet is located piston stroke upper limit position and is equipped with first proximity sensor, the signal input part of first proximity sensor passing signal line connection treater.

2. The thin oil seal type gas holder according to claim 1, wherein: and a second proximity sensor fixed on the inner wall of the cabinet body is arranged below the first proximity sensor, and the second proximity sensor is connected with a signal input end of the processor through a signal line.

3. The thin oil seal type gas holder according to claim 2, wherein: the first proximity sensor is provided with three and is arranged at the same height position in the cabinet body, and the second proximity sensor is also provided with three and is arranged at the same height position in the cabinet body.

4. The thin oil seal type gas holder according to claim 1, 2 or 3, wherein: be equipped with 3# valve and 4# valve on the pipe of diffusing before the cabinet, pipe and gas pipe connection end are diffused before the cabinet to 3# valve and 4# valve to and diffuse before the cabinet between pipe and the communicating pipe hookup location.

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