Symmetrical flattening and blocking device for gas pipes

Abstract

The utility model discloses a kind of symmetry flattening blocking devices of gas pipeline, comprising: support;Two positive and negative tooth screws, respectively symmetrically set on support rotatably;Upper pressing rod, two ends are respectively with the positive thread section of two positive and negative tooth screws Thread connection;Lower pressing rod, two ends are respectively with the reverse thread section of two positive and negative tooth screws Thread connection, lower pressing rod is located below upper pressing rod and mutually parallel;Driving assembly, it is set on support and with one end of two positive and negative tooth screws Connection, to drive two positive and negative tooth screws synchronous rotation, and drive upper pressing rod and lower pressing rod move towards and move flattening gas pipeline or move away and loosen gas pipeline.The utility model can drive upper pressing rod and lower pressing rod move towards and carry out bidirectional symmetry flattening to gas pipeline, avoid the problem that polyethylene pipe strain is excessively concentrated, plastic region is larger caused by flattening in the mode of one-way action flattening, slow down the recession of polyethylene pipe mechanical property and improve service life.

Description

Technical Field

[0001] This utility model relates to the field of gas pipeline technology, and in particular to a symmetrical flattening and blocking device for gas pipelines. Background Technology

[0002] Currently, urban gas low-pressure pipeline systems are mainly composed of polyethylene (PE) pipes. Daily operation and maintenance of gas pipelines requires a large amount of emergency repairs and connections. During this process, specific clamps are often used to flatten the pipes to block gas flow; this technique is known as flattening and blocking.

[0003] In existing technologies, the flattening and blocking clamps for polyethylene pipes typically involve fixing the bottom steel pipe and flattening the top steel pipe unidirectionally from top to bottom, forcing the PE pipe to flatten and deform to achieve a seal. However, this unidirectional flattening method causes asymmetrical deformation of the polyethylene pipe, resulting in asymmetrical stress distribution in the pipe. This can easily lead to excessive strain concentration and a large plastic zone generated by flattening, which exacerbates the degradation of the mechanical properties of the polyethylene pipe and affects its service life.

[0004] Therefore, existing technologies still need to be improved and enhanced. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a symmetrical flattening and blocking device for gas pipelines, which aims to solve the problem that the unidirectional flattening method in the prior art will cause asymmetrical deformation of polyethylene pipes, resulting in asymmetrical stress distribution in the pipeline, which will easily lead to excessive strain concentration, large plastic area generated by flattening, and aggravated degradation of the mechanical properties of polyethylene pipes and affect the service life of the pipeline.

[0006] The technical solution adopted by this utility model to solve the technical problem is as follows:

[0007] In a first aspect, embodiments of this utility model provide a symmetrical flattening and blocking device for gas pipelines, comprising:

[0008] support;

[0009] Two screws with opposite threads are provided, and they are rotatably and symmetrically arranged on the bracket.

[0010] The upper pressure rod has its two ends threadedly connected to the positive thread segments of the two positive and negative thread screws, respectively;

[0011] The lower pressure rod has its two ends threadedly connected to the reverse thread sections of the two positive and negative thread screws, and the lower pressure rod is located below the upper pressure rod and is parallel to it.

[0012] A drive assembly is mounted on the bracket and connected to one end of the two positive and negative threaded screws. The drive assembly is used to drive the two positive and negative threaded screws to rotate synchronously and drive the upper pressure rod and the lower pressure rod to move towards each other to flatten the gas pipe or move away from each other to loosen the gas pipe.

[0013] As a further improved technical solution, the bracket includes:

[0014] A crossbar, with a first through hole at each end of the crossbar, and the driving assembly is mounted on the crossbar;

[0015] The system includes two vertical rods symmetrically arranged at both ends of the horizontal rod to form a U-shaped support, with a second through hole at the bottom of each vertical rod. The top ends of the two threaded rods pass through the two first through holes to connect with the drive assembly, and the bottom ends of the two threaded rods are rotatably disposed in the two second through holes.

[0016] As a further improved technical solution, the aforementioned symmetrical flattening and blocking device for gas pipelines also includes:

[0017] Screw limiting pins; each of the vertical rods has a first screw hole at its bottom side that communicates with the second through hole thereon; the bottom ends of the two positive and negative thread screws are provided with annular limiting grooves along the circumference; the two annular limiting grooves are respectively located in the two second through holes and correspond to the two first screw holes; the screw limiting pins are respectively provided in the two first screw holes; one end of the two screw limiting pins corresponds to and engages with the two annular limiting grooves one by one.

[0018] As a further improved technical solution, the driving component includes:

[0019] The first driven gear is sleeved on the top end of the positive and negative threaded screw and fixed to each other;

[0020] The second driven gear is sleeved on the top of the other positive and negative threaded screw and fixed to each other.

[0021] As a further improvement, the driving component also includes:

[0022] The drive gear has a rotating shaft on the top side of the crossbar. The drive gear is rotatably mounted on the top side of the crossbar via the rotating shaft. The two sides of the drive gear mesh with the first driven gear and the second driven gear, respectively. The drive gear has a handle.

[0023] As a further improved technical solution, the aforementioned symmetrical flattening and blocking device for gas pipelines also includes:

[0024] The first rivet; the top end faces of the two positive and negative threaded screws are respectively provided with second threaded holes, and the first rivet is provided in each of the two second threaded holes, and the heads of the two first rivets respectively abut against the side of the first driven gear away from the crossbar and the side of the second driven gear away from the crossbar.

[0025] As a further improved technical solution, the aforementioned symmetrical flattening and blocking device for gas pipelines also includes:

[0026] The second rivet has a third screw hole on the top end face of the rotating shaft, and a second rivet is provided in the third screw hole. The head of the second rivet abuts against the side of the drive gear away from the crossbar.

[0027] As a further improved technical solution, the aforementioned symmetrical flattening and blocking device for gas pipelines also includes:

[0028] The first slider has a fourth threaded hole that matches the positive thread section. The two positive and negative threaded rods each have a first slider symmetrically arranged on their positive thread sections and are threadedly connected through the fourth threaded hole. The two ends of the upper pressure rod are respectively connected to the two first sliders.

[0029] The second slider has a fifth threaded hole that matches the reverse thread section. The reverse thread sections of the two positive and negative threaded rods are respectively provided with a second slider and are threadedly connected through the fifth threaded hole. The two ends of the pressure rod are respectively connected to the two second sliders.

[0030] As a further improved technical solution, each of the first sliders is provided with a third through hole, and the two ends of the upper pressure rod are respectively detachably disposed in the two third through holes; each of the second sliders is provided with a fourth through hole, and the two ends of the lower pressure rod are respectively detachably disposed in the two fourth through holes.

[0031] As a further improved technical solution, the aforementioned symmetrical flattening and blocking device for gas pipelines also includes:

[0032] First fastening screw, each of the first sliders is provided with a first fastening screw hole that communicates with the third through hole, and each of the first fastening screw holes is provided with a first fastening screw that abuts against the end of the upper pressure rod;

[0033] The second fastening screw, each of the second sliders is provided with a second fastening screw hole that communicates with the fourth through hole, and each of the second fastening screw holes is provided with a second fastening screw that abuts against the end of the lower pressure rod.

[0034] Compared with the prior art, the embodiments of this utility model have the following advantages:

[0035] This utility model provides a symmetrical flattening and blocking device for gas pipelines, comprising: a bracket; two threaded rods, each rotatably and symmetrically arranged on the bracket; an upper pressure rod, the two ends of which are threadedly connected to the threaded sections of the two threaded rods; a lower pressure rod, the two ends of which are threadedly connected to the threaded sections of the two threaded rods, the lower pressure rod being located below the upper pressure rod and parallel to it; and a driving assembly, which is disposed on the bracket and connected to one end of the two threaded rods, for driving the two threaded rods to rotate synchronously, and causing the upper pressure rod and the lower pressure rod to move towards each other to flatten the gas pipeline or move away from each other to loosen the gas pipeline. In this invention, the driving component can drive two positive and negative threaded screws to rotate synchronously, thereby causing the upper and lower pressure rods to move towards each other and simultaneously compress the gas pipeline located between the upper and lower pressure rods from both directions. By performing bidirectional symmetrical flattening of the gas pipeline, the problems of excessive strain concentration in polyethylene pipes and large plastic areas caused by unidirectional flattening methods in the prior art are avoided, thus slowing down the degradation of the mechanical properties of polyethylene pipes and improving their service life. Attached Figure Description

[0036] Figure 1 A three-dimensional structural schematic diagram of a symmetrical flattening and blocking device for gas pipelines provided by this utility model;

[0037] Figure 2 This is a three-dimensional structural diagram of the bracket in this utility model;

[0038] Figure 3 This is a three-dimensional structural diagram of the forward and reverse threaded screw in this utility model;

[0039] Figure 4 An exploded view of a symmetrical flattening and blocking device for a gas pipeline provided by this utility model;

[0040] Figure 5 This is a schematic diagram of the assembly structure of the first driven gear and the positive and negative thread screw in this utility model;

[0041] Figure 6 This is a three-dimensional structural diagram of the first slider in this utility model;

[0042] Figure 7 This is a three-dimensional structural diagram of the second slider in this utility model.

[0043] In the diagram: 1. Bracket; 101. Horizontal bar; 1011. First through hole; 1012. Rotating shaft; 1013. Third screw hole; 102. Vertical bar; 1021. Second through hole; 1022. First screw hole; 2. Threaded screw; 201. Annular limiting groove; 202. Second screw hole; 3. Upper pressure rod; 4. Lower pressure rod; 5. Drive assembly; 501. First driven gear; 502. Second driven gear; 5 03. Drive gear; 5031. Handle; 6. Screw limit pin; 7. First rivet; 8. Second rivet; 9. First slider; 901. Fourth screw hole; 902. Third through hole; 903. First fastening screw hole; 10. Second slider; 1001. Fifth screw hole; 1002. Fourth through hole; 1004. Second fastening screw hole; 11. First fastening screw; 12. Second fastening screw; 13. Slot. Detailed Implementation

[0044] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0045] Example:

[0046] Please see Figures 1-7 The gas pipeline symmetrical flattening and blocking device includes: a support 1; two threaded rods 2, each rotatably and symmetrically mounted on the support 1; an upper pressure rod 3, both ends of which are threaded to the threaded sections of the two threaded rods 2; a lower pressure rod 4, both ends of which are threaded to the threaded sections of the two threaded rods 2, and the lower pressure rod 4 is located below the upper pressure rod 3 and parallel to each other; and a drive assembly 5, mounted on the support 1 and connected to one end of the two threaded rods 2, for driving the two threaded rods 2 to rotate synchronously and causing the upper pressure rod 3 and the lower pressure rod 4 to move towards each other to flatten the gas pipeline or move away from each other to loosen the gas pipeline.

[0047] like Figure 1As shown, in one embodiment of this utility model, the gas pipeline symmetrical flattening and blocking device includes a support 1, a threaded rod 2, an upper pressure rod 3, a lower pressure rod 4, and a driving assembly 5. The threaded rod 2 has two members and is symmetrically arranged vertically on the support 1. Both threaded rods 2 can rotate on the support 1. The upper half of the threaded rod 2 has a positive thread section, and the lower half has a negative thread section. The two ends of the upper pressure rod 3 are threaded to the positive thread sections of the two threaded rods 2, respectively. The two ends of the lower pressure rod 4 are threaded to the negative thread sections of the two threaded rods 2, respectively. The driving assembly 5 is arranged on the support 1 and connected to the top ends of the two threaded rods 2, used to drive the two threaded rods 2 to rotate synchronously, and to drive the upper pressure rod 3 and the lower pressure rod 4 to move towards each other to flatten the gas pipeline or move away from each other to loosen the gas pipeline. In this embodiment, the drive assembly 5 can drive the two positive and negative threaded screws 2 to rotate synchronously, thereby causing the upper pressure rod 3 and the lower pressure rod 4 to move towards each other, and simultaneously squeezing the gas pipeline located between the upper pressure rod 3 and the lower pressure rod 4 from both the top and bottom directions. By performing bidirectional symmetrical flattening of the gas pipeline, the problems of excessive strain concentration in polyethylene pipe and large plastic area caused by unidirectional flattening in the prior art are avoided, thus slowing down the degradation of the mechanical properties of polyethylene pipe and improving its service life.

[0048] like Figure 2 As shown, the bracket 1 further includes a horizontal bar 101 and a vertical bar 102; the two ends of the horizontal bar 101 are respectively provided with a first through hole 1011, and the driving component 5 is disposed on the horizontal bar 101; there are two vertical bars 102, which are symmetrically arranged at the two ends of the horizontal bar 101 to form a U-shaped bracket 1, and the bottom end of each vertical bar 102 is respectively provided with a second through hole 1021; the top ends of the two positive and negative thread screws 2 respectively pass through the two first through holes 1011 to connect with the driving component 5, and the bottom ends of the two positive and negative thread screws 2 are respectively rotatably disposed in the two second through holes 1021. Specifically, the left and right ends of the horizontal bar 101 are integrally formed with the top ends of the two vertical bars 102, and the left and right ends of the horizontal bar 101 are respectively provided with first through holes 1011, and the bottom ends of the vertical bars 102 are respectively provided with second through holes 1021. The two first through holes 1011 and the two second through holes 1021 are respectively opposite to each other. The top end of one screw 2 with positive and negative threads passes through the first through hole 1011 at the left end and is connected to the drive assembly 5, and its bottom end is rotatably set in the second through hole 1021 at the left end. The top end of another screw 2 with positive and negative threads passes through the first through hole 1011 at the right end and is connected to the drive assembly 5, and its bottom end is rotatably set in the second through hole 1021 at the right end.

[0049] like Figure 3As shown, further, the gas pipeline symmetrical flattening and blocking device also includes a screw limiting pin 6; the bottom side of each vertical rod 102 is provided with a first screw hole 1022 communicating with the second through hole 1021 above it; the bottom ends of the two positive and negative thread screws 2 are provided with annular limiting grooves 201 along the circumference; the two annular limiting grooves 201 are respectively located in the two second through holes 1021 and correspond to the two first screw holes 1022; the screw limiting pin 6 is provided in the two first screw holes 1022 respectively; one end of the two screw limiting pins 6 corresponds to and engages with the two annular limiting grooves 201 respectively. Specifically, when the screw limit pin 6 is assembled in the first screw hole 1022, the outer end of the screw limit pin 6 is locked in the first screw hole 1022, and the inner end of the screw limit pin 6 is located in the annular limiting groove 201, so as to limit the upper, lower and lateral positions of the screw 2 with the positive and negative threads, and prevent the screw 2 with the positive and negative threads from shaking when rotating.

[0050] like Figure 4 As shown, in one embodiment of this utility model, the driving assembly 5 includes a first driven gear 501 and a second driven gear 502. The first driven gear 501 is sleeved on the top end of one of the threaded screws 2 and fixed to each other; the second driven gear 502 is sleeved on the top end of another threaded screw 2 and fixed to each other. Specifically, the first driven gear 501 is sleeved on the top end of the left threaded screw 2 and its bottom rests on the crossbar 101. The first driven gear 501 is used to drive the left threaded screw 2 to rotate. The second driven gear 502 is sleeved on the top end of the right threaded screw 2 and its bottom rests on the crossbar 101. The second driven gear 502 is used to drive the right threaded screw 2 to rotate. When it is necessary to flatten the gas pipe between the upper pressure rod 3 and the lower pressure rod 4, the first driven gear 501 and the second driven gear 502 need to be rotated simultaneously and at the same speed. The methods for fixing the first driven gear 501 to the threaded screw 2 and the methods for fixing the second driven gear 502 to the threaded screw 2 include, but are not limited to, the following two: The first fixing method involves grooves on the top side of the threaded screw 2, at the inner hole of the first driven gear 501, and at the inner hole of the second driven gear 502. When the first driven gear 501 is fitted onto the top of the left-side threaded screw 2, the grooves of the two gears correspond and form a retaining groove 13. See details... Figure 5At this time, a rectangular block of appropriate size (not shown) is installed in the slot 13, so that the rectangular block simultaneously engages the first driven gear 501 and the left positive and negative thread screw 2, thereby achieving mutual fixation between the first driven gear 501 and the left positive and negative thread screw 2. The rotation of the first driven gear 501 can drive the left positive and negative thread screw 2 to rotate. The second driven gear 502 and the right positive and negative thread screw 2 are also fixed to each other by engaging the rectangular block with the slot 13. The second fixing method is that the top of the screw 2 with the positive and negative threads adopts a polygonal column structure, such as a pentagon or a hexagon. The inner circular holes of the first driven gear 501 and the second driven gear 502 adopt a polygonal hole structure, such as a pentagonal hole or a hexagonal hole. After the first driven gear 501 and the second driven gear 502 are sleeved on the polygonal column at the top of the screw 2 with the positive and negative threads through the polygonal holes, the rotation of the first driven gear 501 and the second driven gear 502 can drive the screw 2 with the positive and negative threads to rotate.

[0051] Furthermore, the drive assembly 5 also includes a drive gear 503. A rotating shaft 1012 is provided on the top side of the crossbar 101. The drive gear 503 is rotatably mounted on the top side of the crossbar 101 via the rotating shaft 1012. The two sides of the drive gear 503 mesh with the first driven gear 501 and the second driven gear 502, respectively. A handle 5031 is provided on the drive gear 503. Specifically, a cylindrical rotating shaft 1012 is fixedly provided on the top side of the crossbar 101. The drive gear 503 is sleeved on the rotating shaft 1012 and rests on the top side of the crossbar 101. When the operator pushes the handle 5031, the drive gear 503 rotates around the rotating shaft 1012, and during rotation, it drives the first driven gear 501 and the second driven gear 502 to rotate synchronously. Compared to the drive method with only the first driven gear 501 and the second driven gear 502, adding the drive gear 503 makes driving the upper pressure rod 3 and the lower pressure rod 4 more effortless and convenient.

[0052] In one embodiment of this utility model, the gas pipeline symmetrical flattening and blocking device further includes a first rivet 7; the top end faces of the two threaded rods 2 are respectively provided with second threaded holes 202, and each of the two second threaded holes 202 is provided with a first rivet 7, and the heads of the two first rivets 7 respectively abut against the side of the first driven gear 501 away from the crossbar 101 and the side of the second driven gear 502 away from the crossbar 101. Specifically, the first rivet 7 is used to limit the first driven gear 501 and the second driven gear 502 at the top ends of the two threaded rods 2. The specific limiting method is that the head of the first rivet 7 with the larger outer diameter abuts against the top side of the first driven gear 501 and the top side of the second driven gear 502, and the head of the first rivet 7 clamps and limits the first driven gear 501 and the second driven gear 502 with the top side of the crossbar 101. Furthermore, the head of the first rivet 7 is provided with a strip groove on the outer side so that the screwdriver can unscrew the first rivet 7 out of the second screw hole 202.

[0053] Furthermore, the gas pipeline symmetrical flattening and blocking device also includes a second rivet 8. The top end face of the rotating shaft 1012 is provided with a third screw hole 1013, and the second rivet 8 is disposed within the third screw hole 1013. The head of the second rivet 8 abuts against the side of the drive gear 503 opposite to the crossbar 101. Specifically, the second rivet 8 is used to limit the drive gear 503 on the rotating shaft 1012. The limiting method is that the larger outer diameter head of the second rivet 8 abuts against the top side of the drive gear 503, and the head of the second rivet 8 clamps and limits the drive gear 503 against the top side of the crossbar 101. A slot is provided on the outer side of the head of the second rivet 8 to facilitate unscrewing the second rivet 8 from the third screw hole 1013 with a screwdriver.

[0054] like Figure 6 and Figure 7As shown, in one embodiment of this utility model, the gas pipeline symmetrical flattening and blocking device further includes a first slider 9 and a second slider 10; the first slider 9 is provided with a fourth screw hole 901 adapted to the positive thread section, and the positive thread sections of the two positive and negative thread screws 2 are respectively symmetrically provided with a first slider 9 and threadedly connected through the fourth screw hole 901, and the two ends of the upper pressure rod 3 are respectively connected to the two first sliders 9; the second slider 10 is provided with a fifth screw hole 1001 adapted to the negative thread section, and the negative thread sections of the two positive and negative thread screws 2 are respectively symmetrically provided with a second slider 10 and threadedly connected through the fifth screw hole 1001, and the two ends of the lower pressure rod 4 are respectively connected to the two second sliders 10. Specifically, the upper pressure rod 3 is connected to the first slider 9 at both ends, and the first slider 9 is threaded with the spur thread section through the fourth screw hole 901 to achieve its own up and down movement, thereby driving the upper pressure rod 3 to move up and down; the lower pressure rod 4 is connected to the second slider 10 at both ends, and the second slider 10 is threaded with the spur thread section through the fifth screw hole 1001 to achieve its own up and down movement, thereby driving the lower pressure rod 4 to move up and down.

[0055] Furthermore, each of the first sliders 9 is provided with a third through hole 902, and the two ends of the upper pressure rod 3 are detachably disposed in the two third through holes 902 respectively; each of the second sliders 10 is provided with a fourth through hole 1002, and the two ends of the lower pressure rod 4 are detachably disposed in the two fourth through holes 1002 respectively. Specifically, the two ends of the upper pressure rod 3 are respectively inserted into the third through holes 902 of the two first sliders 9, and the first sliders 9 and the lower pressure rod 4 can be detached at any time; the two ends of the lower pressure rod 4 are respectively inserted into the fourth through holes 1002 of the two second sliders 10, and the second sliders 10 and the lower pressure rod 4 can be detached at any time.

[0056] Furthermore, the gas pipeline symmetrical flattening and blocking device also includes a first fastening screw 11 and a second fastening screw 12. Each of the first sliders 9 is provided with a first fastening screw hole 903 that communicates with the third through hole 902. Each of the first fastening screw holes 903 is provided with a first fastening screw 11 that abuts against the end of the upper pressure rod 3. Each of the second sliders 10 is provided with a second fastening screw hole 1004 that communicates with the fourth through hole 1002. Each of the second fastening screw holes 1004 is provided with a second fastening screw 12 that abuts against the end of the lower pressure rod 4. Specifically, when the end of the upper pressure rod 3 is inserted into the third through hole 902 of the first slider 9, the first fastening screw 11 is locked in the first fastening screw hole 903 and the inner end of the first fastening screw 11 presses against the end of the upper pressure rod 3, thereby limiting and fixing the upper pressure rod 3 through extrusion force and friction; when the end of the lower pressure rod 4 is inserted into the fourth through hole 1002 of the second slider 10, the second fastening screw 12 is locked in the second fastening screw hole 1004 and the inner end of the second fastening screw 12 presses against the end of the lower pressure rod 4, thereby limiting and fixing the lower pressure rod 4 through extrusion force and friction.

[0057] This utility model provides a symmetrical flattening and blocking device for gas pipelines, comprising: a support 1; two threaded rods 2, each rotatably and symmetrically arranged on the support 1; an upper pressure rod 3, the two ends of which are threadedly connected to the threaded sections of the two threaded rods 2; a lower pressure rod 4, the two ends of which are threadedly connected to the threaded sections of the two threaded rods 2, the lower pressure rod 4 being located below the upper pressure rod 3 and parallel to each other; and a driving assembly 5, which is arranged on the support 1 and connected to one end of the two threaded rods 2, for driving the two threaded rods 2 to rotate synchronously, and driving the upper pressure rod 3 and the lower pressure rod 4 to move towards each other to flatten the gas pipeline or move away from each other to loosen the gas pipeline. In this invention, the driving component 5 can drive the two positive and negative threaded screws 2 to rotate synchronously, thereby causing the upper pressure rod 3 and the lower pressure rod 4 to move towards each other, and simultaneously squeezing the gas pipeline located between the upper pressure rod 3 and the lower pressure rod 4 from both the top and bottom directions. By flattening the gas pipeline in both directions symmetrically, the problem of excessive strain concentration in polyethylene pipe and large plastic area caused by unidirectional flattening method in the prior art is avoided, thus slowing down the degradation of the mechanical properties of polyethylene pipe and improving its service life.

[0058] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0061] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0063] Of course, the above description of the embodiments of this utility model is quite detailed, but it should not be construed as a limitation on the scope of protection of this utility model. This utility model may have other various implementations. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of this utility model. The scope of protection of this utility model is subject to the appended claims.

Claims

1. A symmetrical flattening and blocking device for gas pipelines, characterized in that, include: support; Two screws with opposite threads are provided, and they are rotatably and symmetrically arranged on the bracket. The upper pressure rod has its two ends threadedly connected to the positive thread segments of the two positive and negative thread screws, respectively; The lower pressure rod has its two ends threadedly connected to the reverse thread sections of the two positive and negative thread screws, and the lower pressure rod is located below the upper pressure rod and is parallel to it. A drive assembly is mounted on the bracket and connected to one end of the two positive and negative threaded screws. The drive assembly is used to drive the two positive and negative threaded screws to rotate synchronously and drive the upper pressure rod and the lower pressure rod to move towards each other to flatten the gas pipe or move away from each other to loosen the gas pipe.

2. The symmetrical flattening and blocking device for gas pipelines according to claim 1, characterized in that, The support includes: A crossbar, with a first through hole at each end of the crossbar, and the driving assembly is mounted on the crossbar; The system includes two vertical rods symmetrically arranged at both ends of the horizontal rod to form a U-shaped support, with a second through hole at the bottom of each vertical rod. The top ends of the two threaded rods pass through the two first through holes to connect with the drive assembly, and the bottom ends of the two threaded rods are rotatably disposed in the two second through holes.

3. The symmetrical flattening and blocking device for gas pipelines according to claim 2, characterized in that, Also includes: Screw limiting pins; each of the vertical rods has a first screw hole at its bottom side that communicates with the second through hole thereon; the bottom ends of the two positive and negative thread screws are provided with annular limiting grooves along the circumference; the two annular limiting grooves are respectively located in the two second through holes and correspond to the two first screw holes; the screw limiting pins are respectively provided in the two first screw holes; one end of the two screw limiting pins corresponds to and engages with the two annular limiting grooves one by one.

4. The symmetrical flattening and blocking device for gas pipelines according to claim 2, characterized in that, The driving component includes: The first driven gear is sleeved on the top end of the positive and negative threaded screw and fixed to each other; The second driven gear is sleeved on the top of the other positive and negative threaded screw and fixed to each other.

5. The symmetrical flattening and blocking device for gas pipelines according to claim 4, characterized in that, The driving component also includes: The drive gear has a rotating shaft on the top side of the crossbar. The drive gear is rotatably mounted on the top side of the crossbar via the rotating shaft. The two sides of the drive gear mesh with the first driven gear and the second driven gear, respectively. The drive gear has a handle.

6. The symmetrical flattening and blocking device for gas pipelines according to claim 4, characterized in that, Also includes: The first rivet; the top end faces of the two positive and negative threaded screws are respectively provided with second threaded holes, and the first rivet is provided in each of the two second threaded holes, and the heads of the two first rivets respectively abut against the side of the first driven gear away from the crossbar and the side of the second driven gear away from the crossbar.

7. The symmetrical flattening and blocking device for gas pipelines according to claim 5, characterized in that, Also includes: The second rivet has a third screw hole on the top end face of the rotating shaft, and a second rivet is provided in the third screw hole. The head of the second rivet abuts against the side of the drive gear away from the crossbar.

8. The symmetrical flattening and blocking device for gas pipelines according to claim 1, characterized in that, Also includes: The first slider has a fourth threaded hole that matches the positive thread section. The two positive and negative threaded rods each have a first slider symmetrically arranged on their positive thread sections and are threadedly connected through the fourth threaded hole. The two ends of the upper pressure rod are respectively connected to the two first sliders. The second slider has a fifth threaded hole that matches the reverse thread section. The reverse thread sections of the two positive and negative threaded rods are respectively provided with a second slider and are threadedly connected through the fifth threaded hole. The two ends of the pressure rod are respectively connected to the two second sliders.

9. The symmetrical flattening and blocking device for gas pipelines according to claim 8, characterized in that, Each of the first sliders is provided with a third through hole, and the two ends of the upper pressure rod are respectively detachably disposed in the two third through holes; each of the second sliders is provided with a fourth through hole, and the two ends of the lower pressure rod are respectively detachably disposed in the two fourth through holes.

10. The symmetrical flattening and blocking device for gas pipelines according to claim 9, characterized in that, Also includes: First fastening screw, each of the first sliders is provided with a first fastening screw hole that communicates with the third through hole, and each of the first fastening screw holes is provided with a first fastening screw that abuts against the end of the upper pressure rod; The second fastening screw, each of the second sliders is provided with a second fastening screw hole that communicates with the fourth through hole, and each of the second fastening screw holes is provided with a second fastening screw that abuts against the end of the lower pressure rod.

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