CN214843815U

CN214843815U - Natural gas line interface gas leakage detection device

Info

Publication number: CN214843815U
Application number: CN202120899404.4U
Authority: CN
Inventors: 范双涛; 陈震; 潘忠伟; 乔超
Original assignee: Lufeng Shenzhou Gas Co ltd
Current assignee: Lufeng Shenzhou Gas Co ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-11-23
Anticipated expiration: 2031-04-28

Abstract

The utility model discloses a natural gas line interface gas leakage detection device relates to natural gas detection technical field. The air leakage detection device comprises a connecting seat and two sealing covers which are identical in structure and symmetrically arranged, wherein a connecting arm is fixed on one side of each sealing cover, the free end of each connecting arm is hinged with the connecting seat, a transmission piece for driving the connecting arms to rotate is arranged in each connecting seat, and the sealing covers are driven by the driving pieces to realize opening and closing actions; when the two sealing covers are buckled, the two sealing covers jointly form an internal space sealing cylinder, and avoidance holes are formed in two sides of the sealing cylinder; and a natural gas detector is arranged in the sealing cover. The utility model discloses, seal the ring flange through the sealed cowling, make the ring flange be in a sealed state, can accurate detection to the ring flange that has the gas leakage phenomenon, improve detection efficiency, prevent to miss the detection phenomenon; the extension rod can increase the operating distance of natural gas detector, makes things convenient for the detection personnel to carry out gas leakage detection to the ring flange that is difficult to direct contact to.

Description

Natural gas line interface gas leakage detection device

Technical Field

The utility model relates to a natural gas detection technical field specifically is a natural gas pipeline interface gas leakage detection device.

Background

Natural gas is any gas naturally occurring in nature, and the main component of natural gas is alkane, wherein methane accounts for most of the natural gas, and small amount of ethane, propane and butane, and in addition, hydrogen sulfide, carbon dioxide, nitrogen and water vapor, small amount of carbon monoxide and trace rare gas such as helium, argon and the like are generally available.

In the natural gas compression course of working, the natural gas need be through multiple pipeline transmission processing, connects through the ring flange between the pipeline, in order to guarantee production safety, whether need often detect the ring flange and leak gas, nevertheless because the compressor often is in open environment, use current natural gas detection technique, be difficult to detect out whether leak gas, simultaneously because the natural gas compressor system is huge, the system is complicated, some ring flanges often are in a place that is difficult to the direct contact, detect more difficult.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a natural gas line interface gas leakage detection device can accurately, high-efficiently detect whether gas leakage to the natural gas line ring flange that leaks in the sky environment, makes things convenient for personnel to carry out gas leakage detection to the ring flange that is difficult to the direct contact, and easy operation is convenient, and is practical high-efficient.

In order to achieve the above object, the utility model provides a following technical scheme: a gas leakage detection device for a natural gas pipeline connector comprises a connecting seat and two sealing covers which are identical in structure and symmetrically arranged, wherein a connecting arm is fixed on one side of each sealing cover, a hanging end of each connecting arm is hinged with the connecting seat, a transmission part for driving the connecting arms to rotate is arranged in each connecting seat, and the sealing covers are driven by a driving part to realize opening and closing actions;

when the two sealing covers are buckled, the two sealing covers jointly form an internal space sealing cylinder, and avoidance holes are formed in two sides of the sealing cylinder;

and a natural gas detector is arranged in the sealing cover.

Preferably, the connecting seat comprises an extension rod and two fixing seats arranged at the front end of the extension rod, two fixing shafts are arranged between the two fixing seats, and the suspended end of the connecting arm is hinged to the fixing shafts.

Preferably, the transmission part comprises a transmission rod arranged inside the extension rod in a sliding mode, a rack is arranged between the two connecting arms at the front end of the transmission rod, and rotating gear teeth matched with the rack are arranged at the suspended end of each connecting arm.

Preferably, a guide groove is formed in the extension rod in a front-back penetrating mode, and the transmission rod is arranged in the guide groove in a sliding mode.

Preferably, a first handle is arranged on the extension rod, a driver is fixed behind the transmission rod and is sleeved outside the extension rod in a sliding mode, and a second handle is arranged on the driver.

Preferably, the second handle is arranged in a horn-shaped structure bent from front to back.

Preferably, a spring for blocking the driving member from moving forward is arranged between the driving member and the connecting seat.

Preferably, a fixing block is arranged between the two fixing seats, a limiting groove is formed in the fixing block, the front end of the rack is inserted into the limiting groove, and a spring is arranged on the front side of the rack in the limiting groove.

Preferably, the sealing cover comprises a cover shell, semicircular grooves are formed in the left side and the right side of the cover shell, and sealing pieces are arranged in the grooves.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses, seal up the ring flange through the sealed cowling, make the ring flange be in a state sealed relatively, can accurate detection to the ring flange that has gas leakage phenomenon, improve detection efficiency, prevent to miss the phenomenon of examining.

2. The utility model discloses, can increase the operating distance of natural gas detector through the extension rod, make things convenient for the measurement personnel to carry out gas leakage detection, easy operation is convenient to the ring flange that is difficult to the direct contact.

3. The utility model discloses, when driving the rack through the transfer line, the rack drives the runner tooth of both sides and rotates in opposite directions about driving, and the runner tooth drives the driving arm and the sealed cowling rotates in opposite directions simultaneously, forms the action that opens and shuts of sealed cowling, is favorable to the sealed cowling to the sealed of ring flange fast, has improved detection efficiency.

Drawings

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

FIG. 2 is a schematic view of a part of the structure of the present invention;

FIG. 3 is a schematic view of the internal structure of the present invention;

fig. 4 is an enlarged view of a portion a of fig. 3 according to the present invention;

FIG. 5 is a schematic structural view of the connecting seat of the present invention;

fig. 6 is a schematic structural view of the connecting arm of the present invention;

fig. 7 is a schematic structural diagram of the actuator and the second handle of the present invention.

In the figure:

1-sealing cover, 11-cover shell, 12-sealing sheet,

2-a connecting seat, 21-a fixed seat, 22-a fixed shaft, 23-an extension rod, 24-a guide groove, 25-a fixed block, 26-a limiting groove, 27-a first handle,

3-connecting arm, 31-driving arm, 32-mounting seat, 33-rotor teeth,

4-a natural gas detector, 5-an alarm,

61-a transmission rod, 62-a rack,

71-driver, 72-second handle,

8-spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Implement method

For convenience of description, a coordinate system is defined as shown in fig. 1 and 3, and the left-right direction is taken as a transverse direction, the front-back direction is taken as a longitudinal direction, and the up-down direction is taken as a vertical direction.

As shown in fig. 1 and 2, the gas leakage detection device for the natural gas pipeline interface comprises a connecting seat 2 and two sealing covers 1 which are identical in structure and symmetrically arranged and are in a semi-cylindrical shape, wherein a connecting arm 3 is fixed on one side of each sealing cover 1; the two sealing covers 1 are hinged with the front end of the connecting seat 2 through a connecting arm 3. A transmission piece for driving the connecting arms 3 to rotate oppositely is arranged in the connecting seat 2 in a sliding manner. Like this, the drive driving medium makes two linking arms 3 rotate in opposite directions, makes linking arm 3 drive two sealed cowlings 1 and rotates in opposite directions then, realizes opening and shutting of sealed cowling 1, conveniently makes 1 cages of sealed cowling cover ring flange. When two the sealed cowling lock, two sealed cowling 1 forms a inner space jointly and can hold the sealed section of thick bamboo of natural gas pipeline flange junction, the both sides of a sealed section of thick bamboo are provided with the hole of dodging that is used for dodging flange plate connecting tube.

Be provided with natural gas detector 4 in the sealed cowling 1, connecting seat 2 on be provided with alarm 5, natural gas detector 4 with alarm electricity be connected or the electric connection. When the sealing cover 1 covers the flange plate, the space around the flange plate is in a sealing state, and the natural gas detector 4 can monitor the concentration of natural gas in the space in real time. When natural gas leaks, the alarm 5 emits light and warns a tester of the leakage. Preferably, the natural gas detectors 4 are 4, and two of the natural gas detectors are fixed at the left side and the right side inside the sealing cover 1. Thus, the natural gas detectors 4 distributed on two sides of the sealing cover 1 can detect the space inside the sealing cover 1 in all directions, the detection range is improved, and the phenomenon of missed detection is prevented. The siren 5 is fixed in the rear of connecting seat 2, makes siren 5 be in the position that a field of vision is easily seen, makes things convenient for the measurement personnel to observe, can survey in real time whether gas leakage when detecting the natural gas.

As a specific embodiment, the connecting base 2 includes an extension rod 23, two fixing bases 21 arranged in parallel are fixedly disposed at a front end of the extension rod, and two fixing shafts 22 are disposed between the two fixing bases 21. The connecting arm 3 comprises a transmission arm 31, one side of the transmission arm 31 is fixedly connected with the sealing cover 1, and the other side of the transmission arm 31 is provided with a shaft hole matched with the fixed shaft 22 and is rotatably connected with the fixed shaft 22 through the shaft hole. Preferably, an installation seat 32 is arranged at one end of the transmission arm 31 connected with the sealing cover 1, and the installation seat 32 is arranged in an arc shape and is matched with the outer side surface of the sealing cover 1; the sealing cover 1 is fixed to the mounting seat 32 by screws. The purpose of this design is that the mounting seat 32 can increase the contact surface for connection between the seal cover 1 and the transmission arm 31, and improve the stability of the connection.

Preferably, as shown in fig. 4, the transmission member includes a transmission rod 61 disposed inside the extension rod 23 and slidably connected to the extension rod 23, a rack 62 is disposed at a front end of the transmission rod between the two transmission arms 31, a rotation wheel tooth 33 engaged with the rack 62 is disposed at a free end of the connecting arm 3, and the rotation wheel tooth 33 and the shaft hole are coaxially disposed. As a specific embodiment, one end of the connecting arm 3, which is matched with the fixed shaft 22, is configured to be an arc-shaped structure, the arc-shaped structure is coaxially arranged with the fixed shaft 22, and the rotating wheel teeth 33 are uniformly arranged on an arc-shaped surface of the arc-shaped structure. When the rack 62 is driven by the transmission rod 61, the rack 62 is engaged with the runner teeth 33 to drive the transmission arm 31 and the seal cover 1 to rotate in opposite directions, thereby forming the opening and closing operation of the seal cover 1.

Preferably, a guide groove 24 is formed in the extension rod 23 in a front-back penetrating manner; the transmission rod 61 is slidably disposed in the guide groove 24. The purpose of design like this is, increase the distance of transfer line 61, and convenience of customers is to the ring flange that is in the eminence, is in between the gap, has the barrier etc. conveniently to these ring flanges that are difficult to direct contact carry out gas leakage detection.

Preferably, the left side and the right side of the tail part of the extension rod 23 close to the extension rod 23 are symmetrically provided with a first handle 27, a driver 71 for driving the transmission rod 61 is fixed behind the transmission rod 61, and the driver 71 is slidably sleeved outside the extension rod 23; the second handles 72 are provided on both left and right sides of the driver 71. In one embodiment, the length of the transmission rod 61 is greater than the length of the extension rod 23; the cross sections of the extension rod 23 and the driver 71 are both square structures, and the length of the driver 71 is greater than the length of the transmission rod 61 which is longer than the extension rod 23; the driver 71 is a cylindrical structure with an open front end face, the inner wall of the cylindrical structure is matched with the outer side face of the extension rod 23, the driver 71 is sleeved behind the extension rod 23 in a sliding mode, and the transmission rod 61 is fixed on the rear side face inside the driver 71. The first handle 27 is fixed to both left and right sides of the extension bar 23 and is located at the front side of the driver 71. The purpose of this design is to drive the driver 71 by using the first handle 27 and the second handle 72 as the force points, so that the driver 71 drives the transmission rod 61, the operation is simple and convenient, and the operator can control the opening and closing angle of the sealing cover 1.

Preferably, the second handle 72 is formed into a horn-shaped structure bent from front to back, so that the operator can conveniently exert force when pushing the second handle 72 forward, and the fingers can be prevented from sliding to two sides to cause force release when pushing the second handle 72.

Further, a spring 8 for blocking the forward movement of the transmission piece relative to the connecting seat is arranged between the transmission piece and the connecting seat 2. As a specific embodiment, a fixing block 25 is disposed between the two fixing seats 21, and the fixing block 25 is located in front of the two fixing shafts 22. A limiting groove 26 is formed in the rear side surface of the fixing block 25 from back to front, the limiting groove 26 is located on the center line of the connecting line of the two fixing shafts 22, and the front end of the rack is inserted into the limiting groove 26. A spring 8 is arranged in the limiting groove 26, one side of the spring 8 is fixedly connected with the fixing block 25, and the other side of the spring 8 is fixedly connected with the rack 62. When the spring 8 is in a natural extension state, the two sealing covers 1 are closed to form a sealing cylinder. When the driver 71 is pushed, the driver 71 drives the transmission rod 61 and the rack 62 to compress the spring 8, and the rack 62 drives the rotation gear 33 to rotate, so that the transmission arm 31 rotates back and drives the sealing cover 1 to unfold. When the driver 71 is released, the spring 8 is expanded and drives the rack 62 to move backwards, so that the rack 62 is restored to the working position and the sealing cover 1 is closed. Therefore, when natural gas detection is carried out, the sealing cover 1 is always in a closed state under the thrust action of the spring 8, the closed state of the sealing cover 1 is not required to be maintained by using external force, and the natural gas detection device is simple and convenient to operate and very labor-saving.

Preferably, the sealing cover 1 comprises a cover shell 11, semicircular grooves are formed in the left side and the right side of the cover shell 11, and arc-shaped sealing pieces 12 are arranged in the grooves. The purpose of design like this is that, through the gasket 12 to the pipeline shutoff of sealed cowling 1 both sides, can increase the inside leakproofness of sealed cowling 1, improves detection efficiency, prevents to miss examining. Preferably, the sealing plate 12 is made of rubber, so that the sealing plate 12 can be attached to a natural gas pipeline better, the detection of the interfaces of the flange plates with different diameters can be adapted, and the applicability of the device is improved.

The working principle is as follows: when the gas leakage alarm is used, the first handle 27 and the second handle 72 are simultaneously held by hands, the second handle 72 is driven by hands to approach the first handle 27, the second handle 72 drives the driver 71 to move forwards, the driver 71 drives the transmission rod 61 and the rack 62 to compress the spring 8, the rack 62 drives the rotating wheel teeth 33 to rotate, the transmission arm 31 rotates reversely and drives the sealing cover 1 to expand, then the expanded sealing cover 1 is arranged on the outer side of a natural gas pipeline flange, then the second handle 7 is released, the spring 8 extends and drives the rack 62 to move backwards, so that the rack 62 restores the station, the sealing cover 1 is closed, the closed sealing cover 1 forms a sealing cylinder to wrap the flange, the space around the flange is in a sealing state, if the flange has a gas leakage phenomenon, the leaked natural gas is detected by the natural gas detector 4 in the sealing space and transmits a gas leakage signal to the alarm 5, the alarm 5 emits light and warns the inspector that there is an air leakage. After the detection is finished, the actions are repeated to open the sealing cover 1, and the sealing cover 1 is taken out to finish the detection.

Example two

Natural gas detector 4 adopt the natural gas concentration detector among the prior art, natural gas concentration detector's test probe fixed set up in sealed cowling 1 in, natural gas concentration detector's display is located outside the sealed bobbin, just sealed cowling 1 on be provided with and be used for holding the through-hole of connecting wire between display and the test probe, the connecting wire with sealed cowling 1 sealing connection. The other structures are the same as those in the first embodiment.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a natural gas line interface gas leakage detection device which characterized in that: the sealing device comprises a connecting seat and two sealing covers which are same in structure and symmetrically arranged, wherein a connecting arm is fixed on one side of each sealing cover, the free end of each connecting arm is hinged with the connecting seat, a transmission part for driving the connecting arms to rotate is arranged in each connecting seat, and the sealing covers are driven by a driving part to realize opening and closing actions;

and a natural gas detector is arranged in the sealing cover.

2. The natural gas pipeline interface air leakage detection device of claim 1, wherein: the connecting seat comprises an extension rod and two fixing seats arranged at the front end of the extension rod, two fixing shafts are arranged between the two fixing seats, and the suspended end of the connecting arm is hinged to the fixing shafts.

3. The natural gas pipeline interface air leakage detection device of claim 2, wherein: the driving medium including slide set up in the inside transfer line of extension pole, the front end of transfer line is located two the linking arm between be provided with the rack, the free end of linking arm be provided with the rack matched with the runner teeth.

4. The natural gas pipeline interface gas leakage detection device of claim 3, wherein: the extension rod is internally provided with a guide groove in a front-back penetrating manner, and the transmission rod is arranged in the guide groove in a sliding manner.

5. The natural gas pipeline interface gas leakage detection device of claim 3, wherein: the extension rod is provided with a first handle, a driver is fixed behind the transmission rod and is sleeved on the outer side of the extension rod in a sliding mode, and the driver is provided with a second handle.

6. The natural gas pipeline interface air leakage detection device of claim 5, wherein: the second handle is arranged into a horn-shaped structure bent from front to back.

7. The natural gas pipeline interface air leakage detection device of claim 1, wherein: and a spring used for blocking the driving piece from moving forwards is arranged between the driving piece and the connecting seat.

8. The natural gas pipeline interface gas leakage detection device of claim 3, wherein: two be provided with the fixed block between the fixing base, the fixed block on seted up the spacing groove, the front end of rack inserts the spacing inslot, the spacing inslot portion be located the front side of rack is provided with the spring.

9. The natural gas pipeline interface air leakage detection device of claim 1, wherein: the sealing cover comprises a cover shell, semicircular grooves are formed in the left side and the right side of the cover shell, and sealing pieces are arranged in the grooves.