阅读说明：本技术 一种模块化智能防泄漏煤气排水器 (Coal gas drainer is prevented leaking by modularization intelligence ) 是由 朱莲东 于 2019-12-06 设计创作，主要内容包括：本发明提供了一种模块化智能防泄漏煤气排水器,包括高压室、中压室以及低压室,高压室借助高压工作管与煤气管路连通,高压工作管的底端延伸至高压室的下部；高压室上部设有第一引导管；中压室设有与第一引导管可拆卸连接的第二引导管,第二引导管的出水端延伸至中压室的下部；中压室上部设有第三引导管；低压室设有与第三引导管可拆卸连接的第四引导管,第四引导管的出水端延伸至低压室的下部；低压室内设有用于防止煤气泄漏至外界的防泄漏装置；低压室上部设有排水管。本发明提供的一种模块化智能防泄漏煤气排水器,高压室、中压室以及低压室分别单独设置,极大地缩短了模块化智能防泄漏煤气排水器的工作中断时间,大大降低了维修难度和成本。(The invention provides a modularized intelligent leakage-proof coal gas drainer which comprises a high-pressure chamber, a middle-pressure chamber and a low-pressure chamber, wherein the high-pressure chamber is communicated with a coal gas pipeline by virtue of a high-pressure working pipe, and the bottom end of the high-pressure working pipe extends to the lower part of the high-pressure chamber; the upper part of the high-pressure chamber is provided with a first guide pipe; the middle pressure chamber is provided with a second guide pipe which is detachably connected with the first guide pipe, and the water outlet end of the second guide pipe extends to the lower part of the middle pressure chamber; the upper part of the middle pressure chamber is provided with a third guide pipe; the low pressure chamber is provided with a fourth guide pipe which is detachably connected with the third guide pipe, and the water outlet end of the fourth guide pipe extends to the lower part of the low pressure chamber; a leakage-proof device for preventing gas from leaking to the outside is arranged in the low-pressure chamber; the upper part of the low pressure chamber is provided with a drain pipe. According to the modularized intelligent leakage-proof gas drainer provided by the invention, the high-pressure chamber, the medium-pressure chamber and the low-pressure chamber are respectively and independently arranged, so that the work interruption time of the modularized intelligent leakage-proof gas drainer is greatly shortened, and the maintenance difficulty and cost are greatly reduced.)

1. The utility model provides a coal gas drainer is prevented leaking by modularization intelligence which characterized in that includes:

the high-pressure working pipe is communicated with a gas pipeline, and the bottom end of the high-pressure working pipe extends to the lower part of the high-pressure chamber; a first guide pipe is arranged at the upper part of the high-pressure chamber;

the middle pressure chamber is provided with a second guide pipe detachably connected with the first guide pipe, and the water outlet end of the second guide pipe extends to the lower part of the middle pressure chamber; a third guide pipe is arranged at the upper part of the middle pressure chamber; and

the low-pressure chamber is provided with a fourth guide pipe detachably connected with the third guide pipe, and the water outlet end of the fourth guide pipe extends to the lower part of the low-pressure chamber; a leakage-proof device for preventing gas from leaking to the outside is arranged in the low-pressure chamber; and a drain pipe is arranged at the upper part of the low-pressure chamber.

2. A modular intelligent leak-proof gas drainer as claimed in claim 1, wherein: the middle pressure chambers are provided with a plurality of middle pressure chambers which are arranged in sequence; the adjacent middle pressure chambers are connected through a flange structure; the second guide pipe and the first guide pipe of the middle pressure chamber at one end are connected through a flange structure, and the third guide pipe and the fourth guide pipe of the middle pressure chamber at the other end are connected through a flange structure.

3. The modular intelligent leak-proof gas drainer as claimed in any one of claims 1 to 2, wherein said leak-proof means comprises:

the mounting seat is arranged in the low-pressure chamber and used for partitioning the low-pressure chamber into an upper cavity and a lower cavity, and a through hole penetrating through the mounting seat along the height direction of the mounting seat is formed in the mounting seat; the mounting seat is provided with a connecting rod fixing seat positioned in a cavity at the lower part of the low-pressure chamber;

the second connecting rod is hinged with the connecting rod fixing seat; one end of the second connecting rod is a first hinged end, and the other end of the second connecting rod is a second hinged end;

the floating ball is hinged with the second hinged end of the second connecting rod; and

and the sealing ball is hinged with the first hinged end of the second connecting rod and used for plugging the through hole or separating from the through hole along with the movement of the floating ball.

4. A modular intelligent leak-proof gas drainer as claimed in claim 3, wherein said low pressure chamber comprises:

the first low-pressure chamber is provided with a drain pipe; the mounting seat is arranged in the first low-pressure chamber; and

a second low pressure chamber detachably connected to the first low pressure chamber; the fourth guide pipe is disposed in the second low pressure chamber.

5. The modular intelligent leak-proof gas drainer as claimed in claim 4, wherein: the first low pressure chamber is connected with the second low pressure chamber through a flange structure.

6. The modular intelligent leak-proof gas drainer as claimed in claim 4, wherein: and the first low-pressure chamber is provided with a water replenishing device communicated with an external water source and used for replenishing water in the first low-pressure chamber.

7. The modular intelligent leak-proof gas drainer as claimed in claim 4, wherein: and the low-pressure chamber is provided with a resetting component which is connected with the sealing ball and used for moving the sealing ball.

8. The modular intelligent leak-proof gas drainer as claimed in claim 4, wherein: and the first low-pressure chamber is provided with a liquid level measuring device for measuring the liquid level of water flow in the first low-pressure chamber.

9. A modular intelligent leak-proof gas drainer as claimed in any one of claims 1 to 2, wherein: the high pressure chamber, the middle pressure chamber and the low pressure chamber are respectively of a tubular shell structure.

10. A modular intelligent leak-proof gas drainer as claimed in any one of claims 1 to 2, wherein: the lower ends of the high-pressure chamber, the middle-pressure chamber and the low-pressure chamber are respectively provided with a sewage discharge outlet and are sealed through a sewage discharge flange; and water adding holes with sealing covers are respectively arranged at the tops of the high-pressure chamber and the middle-pressure chamber.

Technical Field

The invention belongs to corollary equipment of a gas pipeline, and particularly relates to a modularized intelligent leakage-proof gas drainer.

Background

The present used gas drainer divides the container into several partitions, each partition is ー chambers, each chamber is filled with water, the water level difference in each chamber is used, and the overflow mode is adopted to transfer the water in the pipeline one by one, thus achieving the purpose of safe drainage. Once a certain chamber leaks, the gas drainer can be maintained only by disassembling the whole gas drainer, so that the gas drainer is difficult to maintain and high in maintenance cost.

Disclosure of Invention

The invention aims to provide a modularized intelligent anti-leakage gas drainer, which aims to solve the technical problems that the existing gas drainer needs to be repaired only by disassembling the whole gas drainer once a certain room leaks, and has high maintenance difficulty and high maintenance cost.

In order to achieve the purpose, the invention adopts the technical scheme that: there is provided a modular intelligent leak-proof gas drainer, comprising:

the high-pressure working pipe is communicated with a gas pipeline, and the bottom end of the high-pressure working pipe extends to the lower part of the high-pressure chamber; a first guide pipe is arranged at the upper part of the high-pressure chamber;

the middle pressure chamber is provided with a second guide pipe detachably connected with the first guide pipe, and the water outlet end of the second guide pipe extends to the lower part of the middle pressure chamber; a third guide pipe is arranged at the upper part of the middle pressure chamber; and

the low-pressure chamber is provided with a fourth guide pipe detachably connected with the third guide pipe, and the water outlet end of the fourth guide pipe extends to the lower part of the low-pressure chamber; a leakage-proof device for preventing gas from leaking to the outside is arranged in the low-pressure chamber; and a drain pipe is arranged at the upper part of the low-pressure chamber.

As another embodiment of the present application, the middle pressure chamber is provided with a plurality of middle pressure chambers which are arranged in sequence; the adjacent middle pressure chambers are connected through a flange structure; the second guide pipe and the first guide pipe of the middle pressure chamber at one end are connected through a flange structure, and the third guide pipe and the fourth guide pipe of the middle pressure chamber at the other end are connected through a flange structure.

As another embodiment of the present application, the leak prevention apparatus comprises:

the mounting seat is arranged in the low-pressure chamber and used for partitioning the low-pressure chamber into an upper cavity and a lower cavity, and a through hole penetrating through the mounting seat along the height direction of the mounting seat is formed in the mounting seat; the mounting seat is provided with a connecting rod fixing seat positioned in a cavity at the lower part of the low-pressure chamber;

the second connecting rod is hinged with the connecting rod fixing seat; one end of the second connecting rod is a first hinged end, and the other end of the second connecting rod is a second hinged end;

the floating ball is hinged with the second hinged end of the second connecting rod; and

and the sealing ball is hinged with the first hinged end of the second connecting rod and used for plugging the through hole or separating from the through hole along with the movement of the floating ball.

As another embodiment of the present application, the low pressure chamber includes:

the first low-pressure chamber is provided with a drain pipe; the mounting seat is arranged in the first low-pressure chamber; and

a second low pressure chamber detachably connected to the first low pressure chamber; the fourth guide pipe is disposed in the second low pressure chamber.

As another embodiment of the present application, the first low pressure chamber and the second low pressure chamber are connected by a flange structure.

As another embodiment of the application, a water replenishing device communicated with an external water source and used for replenishing water in the first low-pressure chamber is arranged on the first low-pressure chamber.

As another embodiment of the present application, a reset component connected to the sealing ball and used for moving the sealing ball is disposed on the low pressure chamber.

As another embodiment of this application, be equipped with on the first low pressure chamber and be used for measuring the interior rivers liquid level's of first low pressure chamber liquid level measurement device.

As another embodiment of the present application, the high pressure chamber, the middle pressure chamber, and the low pressure chamber are respectively tubular housing structures.

As another embodiment of the present application, the lower ends of the high pressure chamber, the middle pressure chamber and the low pressure chamber are respectively provided with a sewage discharge port and sealed by a sewage discharge flange; and water adding holes with sealing covers are respectively arranged at the tops of the high-pressure chamber and the middle-pressure chamber.

The modular intelligent leakage-proof gas drainer provided by the invention has the beneficial effects that: compared with the prior art, according to the modularized intelligent anti-leakage gas drainer, if one of the high-pressure chamber, the medium-pressure chamber and the low-pressure chamber leaks, the working chamber can be quickly disassembled and replaced by a corresponding new working chamber, so that the working can be restarted, the work interruption time of the modularized intelligent anti-leakage gas drainer is greatly shortened, and the maintenance difficulty and cost are greatly reduced. The high-pressure chamber, the medium-pressure chamber and the low-pressure chamber are respectively and independently arranged, the anticorrosion quality in the independent shell is high, and the anticorrosion treatment is more convenient.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic front view of a modular intelligent leakage-proof gas drainer according to an embodiment of the present invention;

FIG. 2 is a sectional view taken along line A-A of FIG. 1

Fig. 3 is a schematic cross-sectional view of another low pressure chamber used in the embodiment of the present invention.

In the figure: 1. a high pressure chamber; 11. a first guide tube; 12. a high pressure working tube; 2. a middle pressure chamber; 21. a second guide tube; 22. a third guide tube; 3. a low pressure chamber; 31. a fourth guide tube; 32. a drain pipe; 33. a first low pressure chamber; 34. a second low pressure chamber; 4. a leakage prevention device; 41. a mounting seat; 411. a through hole; 42. a connecting rod fixing seat; 43. a second connecting rod; 44. a floating ball; 45. a sealing ball; 5. a water replenishing device; 6. a reset assembly; 7. a liquid level measuring device; 8. an alarm device.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 3 together, a description will now be given of a modular intelligent leakage-proof gas drainer according to the present invention. The modularized intelligent leakage-proof coal gas drainer comprises a high-pressure chamber 1, a medium-pressure chamber 2 and a low-pressure chamber 3, wherein the high-pressure chamber 1 is communicated with a coal gas pipeline through a high-pressure working pipe 12, and the bottom end of the high-pressure working pipe 12 extends to the lower part of the high-pressure chamber 1; a first guide pipe 11 is arranged at the upper part of the high-pressure chamber 1; the middle pressure chamber 2 is provided with a second guide pipe 21 detachably connected with the first guide pipe 11, and the water outlet end of the second guide pipe 21 extends to the lower part of the middle pressure chamber 2; a third guide pipe 22 is arranged at the upper part of the middle pressure chamber 2; the low-pressure chamber 3 is provided with a fourth guide pipe 31 detachably connected with the third guide pipe 22, and the water outlet end of the fourth guide pipe 31 extends to the lower part of the low-pressure chamber 3; a leakage-proof device 4 for preventing gas from leaking to the outside is arranged in the low-pressure chamber 3; a drain pipe 32 is provided at the upper part of the low pressure chamber 3.

Before use, water is respectively filled into the low-pressure chamber 3, the medium-pressure chamber 2 and the high-pressure chamber 1, the water flow liquid level in the low-pressure chamber 3 is ensured to overflow the anti-leakage device 4 and is slightly lower than the position of the drain pipe 32, the anti-leakage device 4 is in a closed state and cannot play a role in preventing leakage, and then the control valve on the high-pressure working pipe 12 is opened, so that the high-pressure chamber 1 and the gas pipeline are in a communicated state. Under the normal working state, the mechanical water and the condensed water in the gas pipeline can be discharged through the drainer. When the pressure in the gas pipeline is suddenly increased under the action of external factors, the gas leaked in the gas pipeline sequentially passes through the high-pressure chamber 1 and the medium-pressure chamber 2 and enters the low-pressure chamber 3, the anti-leakage device 4 in the low-pressure chamber 3 is opened to intercept the gas, and the gas is prevented from overflowing from the water discharge pipe 32.

Compared with the prior art, the modularized intelligent anti-leakage gas drainer provided by the invention has the advantages that once a certain working room leaks, the whole modularized intelligent anti-leakage gas drainer needs to be detached to maintain, and in the maintenance process, the whole drainer needs to be cut off, a leakage point is searched and blocked, the inside of the whole drainer is subjected to anti-corrosion treatment again, and then the drainer can be installed again, so that the maintenance difficulty is extremely high, and the maintenance cost is extremely high. And the gas drainer is prevented leaking by modularization intelligence described herein, if a certain studio in high-pressure chamber 1, medium-pressure chamber 2 and low-pressure chamber 3 takes place to leak, can dismantle it fast, then change corresponding new studio, alright restart work, greatly shortened the work interruption time of gas drainer is prevented leaking by modularization intelligence, greatly reduced maintenance degree of difficulty and cost. The high-pressure chamber 1, the medium-pressure chamber 2 and the low-pressure chamber 3 are respectively and independently arranged, so that the independent shell has high anticorrosion quality and is more convenient to perform anticorrosion treatment.

It should be noted that the gas pipeline and the high-pressure working pipe 12 are communicated or blocked by a control valve.

As a specific implementation manner of the embodiment of the present invention, the high pressure chamber 1 and the medium pressure chamber 2, and the medium pressure chamber 2 and the low pressure chamber 3 are fixedly connected by a screw structure, respectively. The gas drainer wholeness is prevented leaking by effectual this modularization intelligence that has improved, has improved the anti striking ability that this coal gas drainer is prevented leaking by this modularization intelligence.

In the present embodiment, a screw structure between the high pressure chamber 1 and the medium pressure chamber 2 will be described. A first connecting block is arranged on the outer wall of the high-pressure chamber 1; and a second connecting block is arranged on the outer wall of the middle pressure chamber 2, and the first screw rod sequentially penetrates through the first connecting block and the second connecting block and is fixed through a nut.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 and fig. 2, a plurality of middle pressure chambers 2 are arranged in sequence; the adjacent middle pressure chambers 2 are connected through a flange structure; the second guide tube 21 of the middle pressure chamber 2 at one end is connected to the first guide tube 11 by a flange structure, and the third guide tube 22 of the middle pressure chamber 2 at the other end is connected to the fourth guide tube 31 by a flange structure. The number of the middle pressure chambers 2 can be arbitrarily increased or decreased according to the water seal height of the main gas pipeline, so that a modular structure is realized.

It should be noted that, between the adjacently arranged intermediate pressure chambers 2, the second guide pipe 21 of the previous intermediate pressure chamber 2 is connected with the third guide pipe 22 of the next intermediate pressure chamber 2 by a flange structure.

In the present embodiment, the middle pressure chamber 2 and the middle pressure chamber 2 are fixedly connected through a screw structure.

As a specific implementation manner of the embodiment of the present invention, referring to fig. 2 and fig. 3, the leakage preventing device 4 includes an installation seat 41, a second connecting rod 43, a floating ball 44, and a sealing ball 45, the installation seat 41 is disposed in the low-pressure chamber 3 and is used for partitioning the low-pressure chamber 3 into an upper cavity and a lower cavity, and the installation seat 41 is provided with a through hole 411 penetrating through the installation seat 41 along a height direction of the installation seat 41; the mounting seat 41 is provided with a connecting rod fixing seat 42 positioned in a lower cavity of the low-pressure chamber 3; the second connecting rod 43 is hinged with the connecting rod fixing seat 42; one end of the second connecting rod 43 is a first hinged end, and the other end is a second hinged end; the floating ball 44 is hinged with the second hinged end of the second connecting rod 43; the sealing ball 45 is hinged to the first hinged end of the second connecting rod 43 and is used for blocking the through hole 411 or separating from the through hole 411 along with the movement of the floating ball 44.

When the modularized intelligent leakage-proof gas drainer normally works, the floating ball 44 is in contact with the mounting seat 41, the sealing ball 45 is separated from the through hole 411 at the moment, and mechanical water and condensed water in the gas pipeline can sequentially pass through the high-pressure chamber 1, the medium-pressure chamber 2 and the low-pressure chamber 3 and are discharged from the drain pipe 32 arranged on the low-pressure chamber 3. When the pressure in the gas pipeline is suddenly increased, the gas leaked in the gas pipeline sequentially passes through the high-pressure chamber 1, the medium-pressure chamber 2 and the low-pressure chamber 3, is enriched below the mounting seat 41, and forms a water-free area in the lower cavity of the low-pressure chamber 3, the floating ball 44 moves along with the drop of the water level of the lower cavity of the low-pressure chamber 3, and meanwhile, the sealing ball 45 blocks the through hole 411 along with the movement of the floating ball 44 to prevent the gas from overflowing from the drain pipe 32.

In this embodiment, the sealing ball 45 is provided with a sealing ring, the side wall of the through hole 411 is provided with a sealing ring support matched with the sealing ring, and the matching of the sealing ring and the sealing ring support effectively improves the sealing performance of the anti-leakage device 4.

In this embodiment, the sealing ball 45 is hinged with the first hinge end of the second connecting rod 43 by means of a sealing ball connecting seat. The ball connecting seat facilitates the hinging of the ball 45 with the second connecting rod 43.

As an embodiment of the present invention, please refer to fig. 1 to fig. 3, the low pressure chamber 3 includes a first low pressure chamber 33 and a second low pressure chamber 34, the first low pressure chamber 33 is provided with a drain pipe 32; the mounting seat 41 is disposed in the first low-pressure chamber 33; the second low pressure chamber 34 is detachably connected to the first low pressure chamber 33; the fourth guide pipe 31 is disposed in the second low pressure chamber 34. The low-pressure chamber 3 is divided into a first low-pressure chamber 33 and a second low-pressure chamber 34, which facilitates the detachment and replacement of the leakage-preventing device 4 by the operator.

In the present embodiment, the first low pressure chamber 33 and the second low pressure chamber 34 are connected by a flange structure. The first low-pressure chamber 33 and the second low-pressure chamber 34 are simple in connection relationship, and the first low-pressure chamber 33 or the second low-pressure chamber 34 is convenient to detach and replace.

Referring to fig. 3, a water replenishing device 5 is disposed on the first low pressure chamber 33, and is communicated with an external water source and used for replenishing water into the first low pressure chamber 33. In this embodiment, moisturizing device 5 includes the moisturizing pipe with external water source intercommunication, water level measurement sensor and the electrically operated valve who is connected with water level measurement sensor electricity, and when the water level was lower in low-pressure chamber 3, the water level measurement ware just can convert the information that low-pressure chamber 3 lacks water and need supply moisture into the signal of telecommunication and transmit for the electrically operated valve who sets up on the moisturizing pipe, and electrically operated valve can open, and water can flow into in the low-pressure chamber 3 through the moisturizing pipe. The water supplementing device 5 can automatically supplement water into the low-pressure chamber 3, and convenience of the modularized intelligent anti-leakage coal gas drainer is improved.

Referring to fig. 1 to 3 together, as an embodiment of the present invention, a reset component 6 connected to the sealing ball 45 and used for moving the sealing ball 45 is disposed on the low pressure chamber 3. The reset component 6 can drive the sealing ball 45 to quickly block the through hole 411 or separate from the through hole 411.

In this embodiment, the reset assembly 6 includes a pull rod connection seat connected to the sealing ball 45 and a reset pull rod. Reset pull rod one end and pull rod connecting seat are connected, and the other end passes low pressure chamber 3 lateral wall and is the free end, and is equipped with the pull rod connecting seat that resets in the position that the pull rod that resets passed low pressure chamber 3 lateral wall, and the pull rod connecting seat that resets and 3 lateral wall sealing connection of low pressure chamber have avoided rivers in the low pressure chamber 3 to spill over from the gap department that resets pull rod and low pressure chamber 3 hookup location.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to fig. 3, a liquid level measuring device 7 for measuring the liquid level of the water flow in the first low-pressure chamber 33 is disposed on the first low-pressure chamber 33. The liquid level measuring device 7 comprises a liquid level sensor positioning sleeve arranged in the low-pressure chamber 3, a liquid level alarm sensor fixed on the liquid level sensor positioning sleeve and an alarm device electrically connected with the liquid level alarm sensor. The liquid level alarm sensor can convert the change of the liquid level in the low-pressure chamber 3 into an electric signal in time and transmit the electric signal to the alarm device. When the value exceeds the specified value set by people, the alarm device will alarm.

It should be noted that the liquid level sensor positioning sleeve is fixedly connected to the reset pull rod connecting seat.

As a specific implementation manner of the embodiment of the invention, the low-pressure chamber 3 is also provided with a warning device 8, the warning device 8 comprises a carbon monoxide detector, a warning lamp, a buzzer and an induction device, the carbon monoxide detector is arranged at the top of the low-pressure chamber 3 and is used for detecting the content of carbon monoxide in the air around the modularized intelligent anti-leakage gas drainer, the carbon monoxide detector is connected with the warning lamp, when the carbon monoxide detector detects that the concentration of the carbon monoxide on site exceeds the standard, the warning lamp gives an alarm, and meanwhile, the electric valve is automatically closed and reminds the personnel on site to be far away from the drainer, and the warning lamp is arranged at the top of the low-pressure chamber 3.

The warning device 8 further comprises a temperature sensor, the temperature sensor is installed at the top of the low-pressure chamber 3, a temperature probe of the temperature sensor extends downwards to the lower part of the low-pressure chamber 3, and the temperature sensor is used for measuring the temperature of the water body in the low-pressure chamber 3. And the temperature sensor is transmitted to the user terminal through the data conversion module and the data platform in sequence.

As a specific implementation manner of the embodiment of the present invention, the high pressure chamber 1, the intermediate pressure chamber 2, and the low pressure chamber 3 are respectively tubular shell structures.

As a specific implementation manner of the embodiment of the present invention, referring to fig. 1, the lower ends of the high pressure chamber 1, the medium pressure chamber 2, and the low pressure chamber 3 are respectively provided with a sewage discharge port and sealed by a sewage discharge flange, so that the discharge of impurities in each chamber is facilitated. The top parts of the high-pressure chamber 1 and the medium-pressure chamber 2 are respectively provided with a water adding hole with a sealing cover, so that the accumulated water in the high-pressure chamber 1 and the medium-pressure chamber 2 can be supplemented conveniently.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.