CN212945726U

CN212945726U - Natural gas line cutting equipment

Info

Publication number: CN212945726U
Application number: CN202021677269.0U
Authority: CN
Inventors: 骆宇; 毛杰锋; 陈淑娟; 文志航; 蔡俊鹏
Original assignee: Guangdong Xinwang Engineering Technology Co ltd
Current assignee: Guangdong Xinwang Engineering Technology Co ltd
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2021-04-13
Anticipated expiration: 2030-08-12

Abstract

A natural gas pipeline cutting apparatus comprising: the cutting device comprises a supporting platform, a cutting device and a clamping device; the cutting device comprises a cutting turntable and a driving piece which are connected with the supporting platform; the clamping devices are arranged on two sides of the slitting device in pairs; the clamping device comprises a bearing mechanism and a pressing mechanism; the bearing mechanism comprises a bearing bracket connected with the supporting platform and a bearing roller rotatably connected with the bearing bracket; the pressing mechanism comprises a lifting plate positioned above the bearing mechanism, a pressing roller rotatably connected with the lifting plate and an adjusting component used for adjusting the height of the lifting plate relative to the supporting platform. Because inject natural gas line's radial position through two sets of clamping device simultaneously, cut the device and cut the position of natural gas line between two clamping device, make natural gas line possess better force stability, avoid natural gas line radially to take place the skew when the cutting, prevent that natural gas line's cutting edge's planarization from receiving the influence, guarantee the subsequent effect of plugging into of natural gas line.

Description

Natural gas line cutting equipment

Technical Field

The utility model relates to a natural gas line construction auxiliary assembly technical field especially relates to a natural gas line cutting equipment.

Background

Natural gas refers to all gases naturally occurring in nature, including gases formed by various natural processes in the air space, water space and rock space (including oil field gas, gas field gas, mud volcanic gas, coal bed gas, biogenetic gas and the like). Because the reserves of natural gas are abundant and the pollution is little, the natural gas can be widely used, in particular as the fuel for the life of residents, including conventional natural gas and two unconventional natural gases, namely coal bed gas and shale gas. Natural gas is typically produced and then incorporated into a pipeline through which it is obtained for use in daily life. With the improvement of the living standard of people and the enhancement of environmental awareness, the demand of most cities for natural gas is obviously increased. Natural gas is also more economically profitable as a domestic fuel than an industrial fuel.

The natural gas pipeline engineering construction can not be separated from the popularization of natural gas, the pipeline cutting processing is required to be carried out in the laying process of the natural gas pipeline, the natural gas pipeline is not well fixed when the current cutting equipment is used, the natural gas pipeline can deviate in the cutting process, the cutting stability is influenced, the smoothness of a cutting opening in the natural gas pipeline is influenced, and the subsequent connection step of the natural gas pipeline is influenced.

SUMMERY OF THE UTILITY MODEL

Based on this, there is a need for a natural gas pipeline cutting apparatus that avoids radial offset during the cutting process.

A natural gas pipeline cutting apparatus comprising:

a support platform;

the cutting device comprises a cutting turntable movably connected with the supporting platform and a driving piece used for driving the cutting turntable to rotate;

the clamping devices are arranged on two sides of the slitting device in pairs; the clamping device comprises a bearing mechanism and a pressing mechanism; the bearing mechanism comprises a bearing bracket connected with the supporting platform and a bearing roller rotatably connected with the bearing bracket; the downward pressing mechanism comprises a lifting plate positioned above the bearing mechanism, a downward pressing roller rotatably connected with the lifting plate and an adjusting component for adjusting the height of the lifting plate relative to the supporting platform; the supporting roller and the pressing roller are used for limiting the radial position of the natural gas pipeline.

Above-mentioned natural gas line cutting equipment, owing to prescribe a limit to natural gas line's radial position through two sets of clamping device simultaneously, cut the device and cut the position of natural gas line between two clamping device, make natural gas line possess better force stability, avoid natural gas line radially to take place the skew when the cutting, bearing gyro wheel and push down the gyro wheel simultaneously prescribe a limit to natural gas line's position from the equidirectional, can avoid natural gas line because of taking place radial skew and cut the carousel contact unstability in cutting process, prevent that natural gas line's incision's planarization from receiving the influence, guarantee the subsequent effect of plugging into of natural gas line.

In one embodiment, the hold-down mechanism further comprises a locking assembly; the locking assembly comprises a ratchet wheel and a clamping rod, wherein the ratchet wheel and the lower pressing roller synchronously rotate, and the clamping rod is pivoted with the ratchet wheel; the clamping rod is movably engaged with the ratchet wheel so as to limit the rotating direction of the pressing roller; through the rotation direction of kelly locking ratchet or push down the gyro wheel, when pushing down the gyro wheel and natural gas line surface contact, the direction of lockable natural gas line avoids natural gas line to produce circumferential direction.

In one embodiment, the cutting device further comprises a carrier and a pushing assembly; the pushing assembly comprises a sliding rail connected with the supporting platform, a screw rod rotationally connected with the supporting platform and a rotating handle connected with the screw rod; the slitting turntable and the driving piece are arranged on the carrier; the carrier is connected with the supporting platform in a sliding mode through the sliding rail; the carrier is in threaded fit with the screw; thereby avoid cutting taking place violent collision and avoiding cutting the carousel and receive the collision and damage between carousel and the natural gas line when cutting the contact.

In one embodiment, the slitting device further comprises a transmission assembly; the driving piece is a motor; the transmission assembly comprises a driving wheel, a driven wheel and a transmission belt; the driving wheel is sleeved on the output shaft of the driving part; the driven wheel and the slitting turntable synchronously rotate; the transmission belt is sleeved on the driving wheel and the driven wheel; thereby generating efficient cutting effect on the natural gas pipeline.

In one embodiment, the adjusting component comprises a vertical rod connected with the supporting platform and a nut piece sleeved on the vertical rod; the vertical rod movably penetrates through the lifting plate; the nut piece is in threaded fit with the vertical rod; the nut piece is positioned on the upper side of the lifting plate; thereby the height adjustment of the lifting plate can be simply and conveniently completed and the pressing roller can be kept to be attached to the surface of the natural gas pipeline.

In one embodiment, the adjusting assembly further comprises a buffering elastic member sleeved on the vertical rod; the buffer elastic piece is positioned between the lifting plate and the nut piece; therefore, the lifting plate can be prevented from being broken or the natural gas pipeline can be prevented from being deformed due to overlarge pressure of the nut piece on the lifting plate.

In one embodiment, the slitting device further comprises a collecting assembly; the collecting assembly comprises a drainage housing arranged close to the lower side of the slitting turntable and a drainage tube communicated with the drainage housing; the opening of the drainage cover casing faces the slitting turntable; therefore, the peculiar smell gas near the slitting turntable can be sucked and is introduced into the filtering device through the drainage tube, so that the discomfort brought to an operator by the peculiar smell gas is reduced.

In one embodiment, the collection assembly further comprises a spray piece connected to the drainage housing to spray mist into the drainage housing; thereby improving the filtering effect on the gas.

In one embodiment, the racking mechanism further comprises a protective sleeve covering the surface of the racking roller, the protective sleeve being resilient; thereby avoiding the natural gas pipeline from generating depression due to overlarge bearing pressure.

In one embodiment, the backup roller has a circumferential lip thereon for limiting movement of the protective sleeve in the axial direction; thereby avoiding the protective sleeve from loosening from the supporting roller in the rotating process.

Drawings

Fig. 1 is a schematic perspective view of a natural gas pipeline cutting apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic perspective view of the natural gas pipeline cutting apparatus shown in FIG. 1 at another angle;

FIG. 3 is a perspective view of the hold-down mechanism of FIG. 1;

FIG. 4 is an enlarged view of the hold-down mechanism shown in FIG. 3 at A;

FIG. 5 is a partial perspective view of the slitting device of FIG. 1 with the pusher assembly hidden;

figure 6 is an exploded view of the slitting device shown in figure 5.

The corresponding relation between each reference number and each meaning in the drawings is as follows:

100. natural gas pipeline cutting equipment; 20. a support platform; 30. a slitting device; 31. a slitting turntable; 32. a drive member; 33. a carrier; 34. a pushing assembly; 341. a slide rail; 342. a screw; 343. a handle is rotated; 35. a transmission assembly; 351. a driving wheel; 352. a driven wheel; 353. a drive belt; 36. a collection assembly; 361. a drainage cover shell; 362. a drainage tube; 363. a spray member; 40. a clamping device; 50. a support mechanism; 51. a support bracket; 52. supporting the roller; 521. an annular clamp flange; 53. a protective sleeve; 60. a pressing mechanism; 61. a lifting plate; 611. a top block; 62. pressing down the roller; 63. an adjustment assembly; 631. a vertical rod; 632. a nut member; 633. a buffer elastic member; 64. a locking assembly; 641. a ratchet wheel; 642. a clamping rod; 900. a natural gas pipeline.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 6, a natural gas pipeline cutting apparatus 100 according to an embodiment of the present invention is used for cutting a natural gas pipeline 900 to divide the natural gas pipeline 900 into two or more sections. The natural gas pipeline cutting apparatus 100 includes: a supporting platform 20, a cutting device 30 and a clamping device 40; the cutting device 30 comprises a cutting turntable 31 movably connected with the supporting platform 20 and a driving part 32 used for driving the cutting turntable 31 to rotate; the clamping devices 40 are arranged in pairs at both sides of the slitting device 30; the clamping device 40 comprises a supporting mechanism 50 and a pressing mechanism 60; the supporting mechanism 50 comprises a supporting bracket 51 connected with the supporting platform 20 and a supporting roller 52 rotatably connected with the supporting bracket 51; the downward pressing mechanism 60 comprises a lifting plate 61 positioned above the supporting mechanism 50, a downward pressing roller 62 rotatably connected with the lifting plate 61, and an adjusting component 63 for adjusting the height of the lifting plate 61 relative to the supporting platform 20; the backup rollers 52 and the hold down rollers 62 cooperate to define the radial position of the natural gas pipeline 900.

When the natural gas pipeline cutting device 100 is used, the natural gas pipeline 900 is supported on at least two sets of supporting rollers 52, then the heights of the lifting plate 61 and the pressing rollers 62 are adjusted by the adjusting assembly 63, so that the pressing rollers 62 and the supporting rollers 52 are respectively attached to the upper side and the lower side of the natural gas pipeline 900, and the radial position of the natural gas pipeline 900 is locked. Thereafter, the driving member 32 rotates the slitting disks 31, and the slitting disks 31 contact the natural gas pipe 900 from a position between the two gripping devices 40, so that a predetermined position of the natural gas pipe 900 is cut.

Owing to prescribe a limit to natural gas line 900's radial position through two sets of clamping device 40 simultaneously, cut device 30 and cut the position of natural gas line 900 between two clamping device 40, make natural gas line 900 possess better stress stability, avoid natural gas line 900 radially to take place the skew when the cutting, bearing gyro wheel 52 and push down gyro wheel 62 are injectd natural gas line's position from the equidirectional simultaneously, can avoid natural gas line 900 because of taking place radial skew and cut carousel 31 contact unstability in the cutting process, prevent that natural gas line 900's incision's planarization from receiving the influence, guarantee the subsequent effect of plugging into of natural gas line 900.

Because the supporting roller 52 is rotatably connected with the supporting bracket 51, and the pressing roller 62 is rotatably connected with the lifting plate 61, after the clamping device 40 locks the radial position of the natural gas pipeline 900, the natural gas pipeline 900 can freely rotate in the circumferential direction, so that the slitting turntable 31 can sequentially cut at different angles of the preset cutting position by rotating the natural gas pipeline 900. Specifically, the number of the backup rollers 52 or the down-pressure rollers 62 is at least two to define the radial position of the natural gas pipeline 900 from a plurality of points.

Referring to fig. 3 and 4, in one embodiment, the pressing mechanism 60 further includes a locking assembly 64; the locking assembly 64 includes a ratchet 641 rotating synchronously with the down-pressure roller 62 and a lock lever 642 pivotally connecting the ratchet 641; the lock lever 642 is movably engaged with the ratchet 641 to limit the rotational direction of the pressing roller 62.

When the rotating slitting turntables 31 are in contact with the surface of the natural gas pipeline 900, the natural gas pipeline 900 may be caused to rotate along with the slitting turntables 31, and further, equipment may be caused to vibrate or parts of the natural gas pipeline 900 cannot be sequentially cut; since the ratchet 641 and the pressing roller 62 rotate synchronously, the rotation direction of the ratchet 641 or the pressing roller 62 is locked by the lock rod 642, and the angle of the natural gas pipeline 900 can be locked when the pressing roller 62 contacts the surface of the natural gas pipeline 900.

Referring to fig. 4, specifically, if the direction of the natural gas pipe 900 when being rotated by the slitting turntable 31 is taken as the forward direction and the direction opposite to the forward direction is taken as the reverse direction, the lock rod 642 is engaged with the ratchet 641 under the forward rotation trend, so that the lock rod 642 blocks the rotation of the ratchet 641 and the pressing roller 62, and the pressing roller 62 restricts the forward rotation of the natural gas pipe 900 through the surface of the natural gas pipe 900 due to the blocked rotation of the pressing roller 62; when the natural gas pipeline 900 rotates reversely, the engagement between the clamping rod 642 and the ratchet 641 is released, so that the angle of the natural gas pipeline 900 relative to the slitting turntable 31 can be adjusted through the reverse rotation of the natural gas pipeline 900, and the slitting turntable 31 can completely cut the natural gas pipeline 900 through one cycle of reverse rotation of the natural gas pipeline 900.

Referring to fig. 4, further, the ratchet 641 is disposed on one side of the lifting plate 61, and a top block 611 extends from one side of the lifting plate 61 to limit the rotation of the lock rod 642 when the lock rod 642 is engaged with the ratchet 641; the locking assembly 64 further includes a directional resilient member for positively engaging the catch 642 against the top block 611; in the present embodiment, the directional elastic member is a torsion spring coupled between the lifting plate 61 and the catch lever 642.

Referring to fig. 1, in one embodiment, the slitting device 30 further includes a carriage 33 and a pushing assembly 34; the pushing assembly 34 comprises a slide rail 341 connected with the support platform 20, a screw 342 rotatably connected with the support platform 20, and a rotating handle 343 connected with the screw 342; the slitting turnplate 31 and the driving piece 32 are arranged on the carrier 33; the carrier 33 is connected with the support platform 20 in a sliding way through a sliding rail 341; carriage 33 is threadably engaged with screw 342.

By rotating the rotating handle 343, the rotating handle 343 drives the screw 342 to rotate, and under the thread fit, the screw 342 enables the carrier 33 to move along the sliding rail 341, so that the slitting turntable 31 can gradually approach the natural gas pipeline 900, and severe collision between the slitting turntable 31 and the natural gas pipeline 900 is avoided. After the cutting is completed, the pushing assembly 34 enables the slitting turntables 31 to leave the cutting station, and the slitting turntables 31 are prevented from being damaged due to collision in the loading and unloading process of the natural gas pipeline 900.

Referring to fig. 5 and 6, in one embodiment, the slitting device 30 further includes a transmission assembly 35; the driving member 32 is a motor; the transmission assembly 35 comprises a driving wheel 351, a driven wheel 352 and a transmission belt 353; the driving wheel 351 is sleeved on the output shaft of the driving member 32; the driven wheel 352 rotates synchronously with the slitting turntable 31; the driving belt 353 is sleeved on the driving wheel 351 and the driven wheel 352.

When the natural gas pipeline cutting device 100 operates, the driving part 32 operates, and then the driving wheel 351, the transmission belt 353 and the driven wheel 352 drive the slitting turntable 31 to rotate at a high speed, and when the natural gas pipeline 900 contacts with the edge of the slitting turntable 31, the slitting turntable 31 cuts the natural gas pipeline 900 from the surface to the inner cavity of the pipeline, so that the natural gas pipeline 900 is efficiently cut.

Referring to FIG. 3, in one embodiment, the adjusting assembly 63 includes a vertical rod 631 connected to the supporting platform 20 and a nut member 632 sleeved on the vertical rod 631; the vertical rod 631 movably penetrates through the lifting plate 61; nut member 632 is threadedly engaged with upright post 631; the nut member 632 is on the upper side of the elevating plate 61. By rotating the nut member 632, the nut member 632 can move up and down along the vertical rod 631 relative to the support platform 20, and the nut member 632 presses down the lifting plate 61, so that the pressing roller 62 keeps attached to the surface of the natural gas pipeline 900, and the natural gas pipeline 900 is prevented from being separated from the support of the support roller 52. In the present embodiment, the vertical rods 631 are provided on both sides of the supporting mechanism 50, and the vertical rods 631 on both sides of the supporting mechanism 50 are inserted into the same lifting plate 61.

Referring to fig. 3, in one embodiment, the adjusting assembly 63 further includes a buffering elastic member 633 sleeved on the vertical rod 631; the buffering elastic member 633 is between the elevation plate 61 and the nut member 632. When the nut member 632 presses the lifting plate 61, the buffer elastic member 633 generates a buffer action between the nut member 632 and the lifting plate 61, thereby preventing the lifting plate 61 from being broken or the natural gas pipe 900 from being deformed due to an excessive pressure of the nut member 632 on the lifting plate 61. Specifically, the buffering elastic member 633 is a compression spring.

Referring to fig. 5 and 6, in one embodiment, the slitting device 30 further comprises a collecting assembly 36; the collecting component 36 comprises a drainage casing 361 arranged close to the lower side of the slitting turntable 31 and a drainage pipe 362 communicated with the inner cavity of the drainage casing 361; the opening of the drainage casing 361 is directed towards the slitting carousel 31. When the slitting turntables 31 come into contact with the surface of the natural gas pipe 900, the high-temperature friction generates a strong odor, which leaves the operators in the vicinity of the apparatus in an uncomfortable working environment. The drainage housing 361 is communicated to a low-pressure air source through the drainage tube 362, and the inner cavity of the drainage housing 361 is in a low-pressure state, so that the peculiar smell gas near the slitting turntable 31 is sucked in and is introduced into the filtering device through the drainage tube 362, and the discomfort brought to an operator by the peculiar smell gas is reduced.

Referring to fig. 5 and 6, in one embodiment, the collecting assembly 36 further includes a spraying member 363 connected to the drainage housing 361 for spraying the mist into the drainage housing 361. After the odor near the slitting turntable 31 is sucked into the inner cavity of the drainage housing 361, the spray piece 363 communicated with the liquid supply pipeline disperses the adsorbed liquid into fog drops and sprays the fog drops into the inner cavity of the drainage housing 361, so that the adhesion effect on the odor molecules is generated, and the subsequent filtering effect on the odor is improved. Specifically, the spray 363 is a nozzle or an ultrasonic atomizer, and the adsorption liquid may be water.

Referring to FIG. 1, in one embodiment, the racking mechanism 50 further includes a protective sleeve 53 covering the surface of the racking roller 52, the protective sleeve 53 being flexible. The protective sleeve 53 covers the surface of the bearing roller 52, so that the contact area between the bearing roller 52 and the natural gas pipeline 900 can be increased, and the natural gas pipeline 900 is prevented from being sunken due to overlarge bearing pressure.

Referring to fig. 1, in one embodiment, the backup roller 52 has a circumferential lip 521, and the circumferential lip 521 is used to limit the movement of the protection sleeve 53 in the axial direction of the backup roller 52. The circumferential lip 521 is distributed along the surface of the backup roller 52 to prevent the protective sleeve 53 from loosening from the backup roller 52 during rotation.

In this embodiment, when the natural gas pipeline cutting apparatus 100 is used, the natural gas pipeline 900 is supported on at least two sets of supporting rollers 52, and then the heights of the lifting plate 61 and the pressing rollers 62 are adjusted by the adjusting assembly 63, so that the pressing rollers 62 and the supporting rollers 52 are respectively attached to the upper side and the lower side of the natural gas pipeline 900, and the radial position of the natural gas pipeline 900 is locked. Thereafter, the driving member 32 rotates the slitting disks 31, and the slitting disks 31 contact the natural gas pipe 900 from a position between the two gripping devices 40, so that a predetermined position of the natural gas pipe 900 is cut.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A natural gas pipeline cutting apparatus, comprising:

a support platform;

2. The natural gas pipeline cutting apparatus of claim 1, wherein the hold-down mechanism further comprises a locking assembly; the locking assembly comprises a ratchet wheel and a clamping rod, wherein the ratchet wheel and the lower pressing roller synchronously rotate, and the clamping rod is pivoted with the ratchet wheel; the clamping rod is movably engaged with the ratchet wheel so as to limit the rotating direction of the pressing roller.

3. The natural gas pipeline cutting apparatus of claim 1, wherein the splitting device further comprises a carriage and a pusher assembly; the pushing assembly comprises a sliding rail connected with the supporting platform, a screw rod rotationally connected with the supporting platform and a rotating handle connected with the screw rod; the slitting turntable and the driving piece are arranged on the carrier; the carrier is connected with the supporting platform in a sliding mode through the sliding rail; the carrier is in threaded fit with the screw.

4. The natural gas pipeline cutting apparatus of claim 1, wherein the slitting device further comprises a transmission assembly; the driving piece is a motor; the transmission assembly comprises a driving wheel, a driven wheel and a transmission belt; the driving wheel is sleeved on the output shaft of the driving part; the driven wheel and the slitting turntable synchronously rotate; the transmission belt is sleeved on the driving wheel and the driven wheel.

5. The natural gas pipeline cutting device according to claim 1, wherein the adjusting assembly comprises a vertical rod connected to the supporting platform and a nut member sleeved on the vertical rod; the vertical rod movably penetrates through the lifting plate; the nut piece is in threaded fit with the vertical rod; the nut member is located at an upper side of the lifting plate.

6. The natural gas pipeline cutting apparatus of claim 5, wherein the adjustment assembly further comprises a buffering elastic member sleeved on the vertical rod; the buffering elastic piece is arranged between the lifting plate and the nut piece.

7. The natural gas pipeline cutting apparatus of claim 1, wherein the slitting device further comprises a collecting assembly; the collecting assembly comprises a drainage housing arranged close to the lower side of the slitting turntable and a drainage tube communicated with the drainage housing; the opening of the drainage cover shell faces the slitting turntable.

8. The natural gas pipeline cutting apparatus of claim 7, wherein the collection assembly further comprises a spray piece connected to the flow-directing enclosure to spray a mist into the flow-directing enclosure.

9. The natural gas pipeline cutting apparatus of claim 1, wherein the retainer mechanism further comprises a protective sleeve covering a surface of the retainer roller, the protective sleeve having elasticity.

10. The natural gas pipeline cutting apparatus of claim 9, wherein the backup roller has an annular snap rim thereon for restricting movement of the protective sleeve in an axial direction.