A power tunnel culvert

Abstract

The present invention provides a power tunnel culvert, which belongs to the technical field of tunnel culverts. The power tunnel culvert includes a basic component and a fixing component. The basic component includes an outer shell, annular steel bars, a concrete layer, an inner shell, longitudinal steel bars, transverse steel bars, a cable bracket, a pipe fitting, a rigid socket, a rubber sealing ring and a sealing protection ring. The outer shell is sleeved outside the annular steel bars, the longitudinal steel bars and the transverse steel bars are both arranged in the inner wall of the outer shell, and the inner shell is arranged on the outer wall of the longitudinal steel bars and the transverse steel bars. When in use, the end of the first locking member squeezes the outer wall of the first slide rail to fix the first slider on the first slide rail. Through the above-mentioned adjustment of the second cross plate, the cable is fixed between the second cross plates. The power tunnel culvert is convenient for fixing the cable according to the specific shape formed after laying, thereby improving the work efficiency of the staff.

Description

Technical Field

[0001] The present invention relates to the field of tunnel culverts, and in particular to a power tunnel culvert. Background Art

[0002] The construction method commonly used in the power industry is to dig tunnels. It is divided into three construction processes: primary lining, waterproofing, and secondary lining. These three processes are basically all done by manpower, with huge labor and a long construction period. If there are complex strata such as large groundwater and sandy soil layers during construction, it is impossible to excavate normally. It is necessary to use double liquid slurry to reinforce the soil before normal construction can be carried out, which increases the construction investment funds.

[0003] At present, in the process of laying cables on cable supports in existing power tunnel culverts, it is too time-consuming to fix the cables on the cable supports due to the different shapes of the cables after laying, which reduces the work efficiency of the staff. Summary of the invention

[0004] In order to remedy the above deficiencies, the present invention provides a power tunnel culvert, which aims to improve the process of laying cables on cable racks. Due to the different shapes of the cables after laying, it takes too much time to fix the cables on the cable racks, thereby reducing the work efficiency of the staff.

[0005] The present invention is achieved in that:

[0006] The invention provides a power tunnel culvert, comprising a basic component and a fixing component.

[0007] The basic components include an outer shell, annular steel bars, a concrete layer, an inner shell, longitudinal steel bars, transverse steel bars, a cable bracket, a pipe fitting, a rigid socket, a rubber sealing ring and a sealing protection ring. The outer shell is sleeved outside the annular steel bars, the longitudinal steel bars and the transverse steel bars are both arranged in the inner wall of the outer shell, the inner shell is arranged on the outer walls of the longitudinal steel bars and the transverse steel bars, the concrete layer is filled between the inner shell and the outer shell, the pipe fitting is fixed in the outer shell, the cable bracket is fixed in the inner wall of the inner shell, the rigid socket is fixed on the outer wall of the outer shell, and the rubber sealing ring and the sealing protection ring are both sleeved on the outer shell.

[0008] The fixing assembly includes a first slide rail, a first slider, a first locking piece, a cable, an L-shaped plate, a first cross plate, a second cross plate, a slide rod, a threaded rod, a first fixed block, a second fixed block, a column, a second slide rail, a second slider, a second locking piece, a third fixed block, a hollow column, a connecting rod and a third locking piece. The first slide rail is fixed in the cable bracket, and the first slider slides on the first slide rail.

[0009] The first locking piece threadably passes through the first slider, the first locking piece and the first slide rail are arranged correspondingly, one end of the L-shaped plate is fixed on the upper surface of the first slider, the threaded rod threadably passes through the L-shaped plate, the lower end of the threaded rod is rotatably set on the upper surface of the first horizontal plate, one end of the sliding rod is fixed on the upper surface of the first horizontal plate, the sliding rod slides through the L-shaped plate, the first fixed block and the second fixed block are both fixed on the lower surface of the first horizontal plate, and one end of the column is fixed on the upper surface of the second horizontal plate.

[0010] The other end of the column is rotatably set in the second fixed block, the second slide rail is fixed on the upper surface of the second cross plate, the second slider slides on the second slide rail, the second locking piece threadedly penetrates the second slider, the second locking piece and the second slide rail are correspondingly arranged, the third fixed block is fixed on the upper surface of the second slider, the ends of the hollow column are rotatably set in the third fixed block and the first fixed block respectively, the end of the connecting rod is inserted in the hollow column, the third locking piece threadedly penetrates the hollow column, the third locking piece and the connecting rod are correspondingly arranged, and the cable is laid on the upper surface of the cable bracket.

[0011] In one embodiment of the present invention, the basic assembly further comprises a walkway, and the walkway is fixed on the inner surface of the inner shell.

[0012] In an embodiment of the present invention, at least two rubber sealing rings are provided, and the rubber sealing rings are equidistantly arranged at the ends of the outer shell.

[0013] In one embodiment of the present invention, the fixing assembly further comprises a rotating member, the rotating member is fixed on the upper surface of the first transverse plate, and the end of the threaded rod is fixed in the rotating member.

[0014] In an embodiment of the present invention, the sliding rod comprises a sliding rod body and a limiting plate, the sliding rod body slides through the L-shaped plate, and the limiting plate is fixed to the end of the sliding rod body.

[0015] In one embodiment of the present invention, the threaded rod comprises a threaded rod body and a hand-holding portion, the threaded rod body is threadedly passed through the L-shaped plate, and the hand-holding portion is fixed to the end of the threaded rod body.

[0016] In one embodiment of the present invention, the inner shell is horseshoe-shaped.

[0017] In one embodiment of the present invention, the basic assembly further comprises a support column, and the support column is fixed between the lower surface of the cable bracket and the inner wall of the inner shell.

[0018] In an embodiment of the present invention, at least three third locking members are provided on the hollow column, and the third locking members are axially equidistantly arranged on the hollow column.

[0019] In one embodiment of the present invention, the length of the internal thread of the pipe fitting is not less than 50 mm.

[0020] The beneficial effects of the present invention are as follows: the power tunnel culvert obtained by the present invention through the above design, when in use, the cable is laid on the cable bracket, and according to the shape formed after the cable is laid, the threaded rod is rotated, and the second cross plate is moved up and down under the joint action of the threaded rod, the slide rod and the first cross plate, and the second slider is moved to control the position of the second slider on the second slide rail, and then the distance between the ends of the hollow column is controlled, the angle between the second cross plate and the cable bracket is adjusted, and the second locking piece is rotated, and the end of the second locking piece is squeezed by the outer wall of the second slide rail, so that the second slider is fixed on the second slide rail, and then the third locking piece is rotated, and the end of the third locking piece is squeezed by The outer wall of the connecting rod fixes the connecting rod in the hollow column. Under the joint action of the second locking member and the third locking member, the relative position between the second cross plate and the cable bracket is fixed. The first slider is moved to control the position of the first slider on the first slide rail, thereby realizing the lateral movement of the second cross plate. The first locking member is rotated, and the end of the first locking member squeezes the outer wall of the first slide rail to fix the first slider on the first slide rail. Through the above-mentioned adjustment of the second cross plate, the cable is fixed between the second cross plates. The power tunnel culvert is easy to fix according to the specific shape formed after the cable is laid, thereby improving the work efficiency of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the cross-sectional structure of a power tunnel culvert provided in an embodiment of the present invention;

[0023] Figure 2 A schematic cross-sectional structure diagram of a basic component provided for an embodiment of the present invention;

[0024] Figure 3 A schematic cross-sectional structure diagram of a fixing assembly provided in an embodiment of the present invention;

[0025] Figure 4 The embodiments of the present invention provide Figure 3A magnified image of area A;

[0026] Figure 5 A diagram showing the relationship between the outer shell and the rigid socket provided in an embodiment of the present invention;

[0027] Figure 6 A three-dimensional view of a pipe fitting provided in an embodiment of the present invention;

[0028] Figure 7 A diagram showing the relationship between the outer shell and the pedestrian walkway provided in an embodiment of the present invention.

[0029] In the figure: 100-base assembly; 110-outer shell; 120-circumferential reinforcement; 130-concrete layer; 140-inner shell; 150-longitudinal reinforcement; 160-transverse reinforcement; 170-cable support; 180-walkway; 190-pipe fitting; 191-rigid socket; 192-rubber sealing ring; 193-sealing protection ring; 194-support column; 200-fixing assembly; 210-first slide rail; 220-first slider; 230-first locking member; 240-cable; 250-L-type Plate; 260-rotating part; 270-first horizontal plate; 280-second horizontal plate; 290-sliding rod; 2901-sliding rod body; 2902-limiting plate; 291-threaded rod; 2911-threaded rod body; 2912-handling part; 292-first fixed block; 293-second fixed block; 294-column; 295-second slide rail; 296-second slider; 297-second locking member; 298-third fixed block; 299-hollow column; 2990-connecting rod; 2991-third locking member. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] Example

[0038] See also Figure 1-7The present invention provides a technical solution: a power tunnel culvert, comprising a basic component 100 and a fixing component 200. The fixing component 200 is fixed on the basic component 100, and the power tunnel culvert is convenient for fixing the cable 240 according to the specific shape formed after the cable 240 is laid, thereby improving the work efficiency of the staff.

[0039] See also Figure 1 , Figure 2 and Figure 5-Figure 7 The basic component 100 includes an outer shell 110, an annular steel bar 120, a concrete layer 130, an inner shell 140, a longitudinal steel bar 150, a transverse steel bar 160, a cable bracket 170, a pipe fitting 190, a rigid socket 191, a rubber sealing ring 192 and a sealing protection ring 193. The outer shell 110 is sleeved outside the annular steel bar 120, the longitudinal steel bar 150 and the transverse steel bar 160 are both arranged in the inner wall of the outer shell 110, the inner shell 140 is arranged on the outer wall of the longitudinal steel bar 150 and the transverse steel bar 160, the inner shell 140 is horseshoe-shaped, which is convenient for installing and fixing the cable bracket in the inner shell 140, the concrete layer 130 is filled between the inner shell 140 and the outer shell 110, the pipe fitting 190 is welded in the outer shell 110, and the internal thread length of the pipe fitting 190 is not less than 50 mm, which is convenient for installing and fixing the one-way valve in the pipe fitting 190, and the electric The cable bracket 170 is fixed to the inner wall of the inner shell 140 by bolts. The basic component 100 also includes a support column 194, which is fixed between the lower surface of the cable bracket 170 and the inner wall of the inner shell 140 by bolts. The support column 194 makes the cable bracket 170 have a stronger load-bearing capacity. The rigid socket 191 is welded to the outer wall of the outer shell 110. The rubber sealing ring 192 and the sealing protection ring 193 are both sleeved on the outer shell 110. At least two rubber sealing rings 192 are provided, and the rubber sealing rings 192 are equidistantly arranged at the ends of the outer shell 110. Multiple rubber sealing rings 192 make the connection between the outer shells 110 more sealed. The basic component 100 also includes a walkway 180, which is fixed to the inner surface of the inner shell 140 by bolts. The walkway 180 facilitates the operator to walk in the inner shell 140.

[0040] See also Figure 2-Figure 4 The fixing assembly 200 includes a first slide rail 210, a first slider 220, a first locking member 230, a cable 240, an L-shaped plate 250, a first transverse plate 270, a second transverse plate 280, a slide rod 290, a threaded rod 291, a first fixed block 292, a second fixed block 293, a column 294, a second slide rail 295, a second slider 296, a second locking member 297, a third fixed block 298, a hollow column 299, a connecting rod 2990 and a third locking member 2991. The first slide rail 210 is welded in the cable bracket 170, and the first slider 220 slides on the first slide rail 210.

[0041] The first locking member 230 is threadedly penetrated through the first slider 220, and the first locking member 230 and the first slide rail 210 are arranged correspondingly. One end of the L-shaped plate 250 is fixed to the upper surface of the first slider 220 by a bolt. The threaded rod 291 is threadedly penetrated through the L-shaped plate 250, and the lower end of the threaded rod 291 is rotatably arranged on the upper surface of the first horizontal plate 270. The threaded rod 291 includes a threaded rod body 2911 and a handheld portion 2912. The threaded rod body 2911 is threadedly penetrated through the L-shaped plate 250, and the handheld portion 2912 is welded to the end of the threaded rod body 2911. The handheld portion 2912 is convenient for rotating the threaded rod body 2911. The handheld portion 2912 in this embodiment is a hand wheel. The fixing assembly 200 also includes a rotating member 260, which is fixed to the first horizontal plate 270 by bolts. On the upper surface, the end key of the threaded rod 291 is connected to the rotating member 260, and the rotating member 260 enables the first horizontal plate 270 to feed forward more smoothly. The rotating member 260 in this embodiment is a bearing, and one end of the sliding rod 290 is welded to the upper surface of the first horizontal plate 270, and the sliding rod 290 slides through the L-shaped plate 250. The sliding rod 290 includes a sliding rod body 2901 and a limiting plate 2902. The sliding rod body 2901 slides through the L-shaped plate 250, and the limiting plate 2902 is welded to the end of the sliding rod body 2901. The limiting plate 2902 effectively prevents the sliding rod body 2901 from sliding out of the L-shaped plate 250. The first fixed block 292 and the second fixed block 293 are both fixed to the lower surface of the first horizontal plate 270 by bolts, and one end of the column 294 is welded to the upper surface of the second horizontal plate 280.

[0042] The other end of the column 294 is rotatably arranged in the second fixed block 293, the second slide rail 295 is welded to the upper surface of the second cross plate 280, the second slider 296 slides on the second slide rail 295, the second locking member 297 is threaded through the second slider 296, the second locking member 297 is arranged corresponding to the second slide rail 295, the third fixed block 298 is fixed to the upper surface of the second slider 296 by bolts, the ends of the hollow column 299 are rotatably arranged in the third fixed block 298 and the first fixed block 292, the end of the connecting rod 2990 is inserted in the hollow column 299, and the third locking member 297 is arranged corresponding to the second slide rail 295. The 991 thread penetrates the hollow column 299, the third locking member 2991 and the connecting rod 2990 are arranged correspondingly, at least three third locking members 2991 are arranged on the hollow column 299, and the third locking members 2991 are axially equidistantly arranged on the hollow column 299. The ends of the plurality of third locking members 2991 squeeze the outer wall of the connecting rod 2990 so that the connecting rod 2990 is more firmly fixed in the hollow column 299. The cable 240 is laid on the upper surface of the cable bracket 170. In this embodiment, the first locking member 230, the second locking member 297 and the third locking member 2991 are all bolts.

[0043] Specifically, the working principle of the power tunnel culvert is as follows: when in use, the rubber sealing ring 192 and the sealing protection ring 193 are sleeved on the outer shell 110, and then the rigid socket 191 on the other outer shell 110 is sleeved on the rubber sealing ring 192 and the sealing protection ring 193 to realize the combination between the outer shells 110. The rubber sealing ring 192 makes the sealing between the outer shell 110 and the rigid socket 191 better. The installation of the cable bracket 170 is completed by the factory during the production of the outer shell 110. In this way, the mechanized pipe jacking construction process realizes long-distance The cable 240 is laid on the cable support 170, and according to the shape of the cable 240 after laying, the threaded rod 291 is rotated, and the second cross plate 280 is moved up and down under the joint action of the threaded rod 291, the slide bar 290 and the first cross plate 270, and the second slider 296 is moved to control the position of the second slider 296 on the second slide rail 295, and then the distance between the ends of the hollow column 299 is controlled to adjust the distance between the second cross plate 280 and the cable 240. The angle of the bracket 170 is adjusted by rotating the second locking member 297. The end of the second locking member 297 squeezes the outer wall of the second slide rail 295, so that the second slider 296 is fixed on the second slide rail 295. The third locking member 2991 is rotated. The end of the third locking member 2991 squeezes the outer wall of the connecting rod 2990, so that the connecting rod 2990 is fixed in the hollow column 299. Under the joint action of the second locking member 297 and the third locking member 2991, the relative position between the second cross plate 280 and the cable bracket 170 is fixed. The first locking member 2991 is moved. The slider 220 controls the position of the first slider 220 on the first slide rail 210, thereby realizing the lateral movement of the second cross plate 280, and rotating the first locking member 230. The end of the first locking member 230 squeezes the outer wall of the first slide rail 210, so that the first slider 220 is fixed on the first slide rail 210. Through the above-mentioned adjustment of the second cross plate 280, the cable 240 is fixed between the second cross plates 280. The power tunnel culvert is convenient for fixing the cable 240 according to the specific shape formed after laying, thereby improving the work efficiency of the staff.

[0044] It should be noted that the specific model and specifications of the cable 240 need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the field, so it will not be described in detail.

[0045] The power supply of the cable 240 and its principle are clear to those skilled in the art and will not be described in detail here.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power tunnel culvert, characterized in that: include A foundation assembly (100), the foundation assembly (100) comprising an outer shell (110), annular steel bars (120), a concrete layer (130), an inner shell (140), longitudinal steel bars (150), transverse steel bars (160), a cable support (170), a pipe fitting (190), a rigid socket (191), a rubber sealing ring (192) and a sealing protection ring (193), the outer shell (110) being sleeved outside the annular steel bars (120), the longitudinal steel bars (150) and the transverse steel bars (160) being both arranged in the inner wall of the outer shell (110), The inner shell (140) is arranged on the outer wall of the longitudinal steel bar (150) and the transverse steel bar (160), the concrete layer (130) is filled between the inner shell (140) and the outer shell (110), the pipe (190) is fixed in the outer shell (110), the cable support (170) is fixed in the inner wall of the inner shell (140), the rigid socket (191) is fixed on the outer wall of the outer shell (110), and the rubber sealing ring (192) and the sealing protection ring (193) are both sleeved on the outer shell (110); A fixing assembly (200), the fixing assembly (200) comprising a first slide rail (210), a first slider (220), a first locking member (230), a cable (240), an L-shaped plate (250), a first transverse plate (270), a second transverse plate (280), a slide rod (290), a threaded rod (291), a first fixing block (292), a second fixing block (293), a column (294), a second slide rail (295), a second slider (296), a second locking member (297), a third fixing block (298), a hollow column (299), a connecting rod (2990) and a third locking member (2991), the first slide rail (210) being fixed in the cable bracket (170), and the first slider (220) sliding on the first slide rail (210); The first locking member (230) is threadedly passed through the first sliding block (220), the first locking member (230) and the first sliding rail (210) are arranged correspondingly, one end of the L-shaped plate (250) is fixed on the upper surface of the first sliding block (220), the threaded rod (291) is threadedly passed through the L-shaped plate (250), the lower end of the threaded rod (291) is rotatably set on the upper surface of the first horizontal plate (270), one end of the sliding rod (290) is fixed on the upper surface of the first horizontal plate (270), the sliding rod (290) slides through the L-shaped plate (250), the first fixing block (292) and the second fixing block (293) are both fixed on the lower surface of the first horizontal plate (270), and one end of the column (294) is fixed on the upper surface of the second horizontal plate (280); The other end of the column (294) is rotatably arranged in the second fixed block (293); the second slide rail (295) is fixed on the upper surface of the second cross plate (280); the second slider (296) slides on the second slide rail (295); the second locking member (297) is threadedly passed through the second slider (296); the second locking member (297) and the second slide rail (295) are arranged correspondingly; the third fixed block (298) is fixed on the second slider (29 6), the ends of the hollow column (299) are rotatably arranged in the third fixing block (298) and the first fixing block (292) respectively, the end of the connecting rod (2990) is inserted in the hollow column (299), the third locking member (2991) is threadedly passed through the hollow column (299), the third locking member (2991) and the connecting rod (2990) are arranged correspondingly, and the cable (240) is laid on the upper surface of the cable bracket (170).

2. The power tunnel culvert according to claim 1, characterized in that: The basic assembly (100) further comprises a walkway (180), wherein the walkway (180) is fixed on the inner surface of the inner shell (140).

3. The power tunnel culvert according to claim 1, characterized in that: At least two rubber sealing rings (192) are provided, and the rubber sealing rings (192) are equidistantly arranged at the ends of the outer shell (110).

4. The power tunnel culvert according to claim 1, characterized in that: The fixing assembly (200) further comprises a rotating member (260), wherein the rotating member (260) is fixed on the upper surface of the first transverse plate (270), and the end of the threaded rod (291) is fixed in the rotating member (260).

5. The power tunnel culvert according to claim 1, characterized in that: The sliding rod (290) comprises a sliding rod body (2901) and a limiting plate (2902); the sliding rod body (2901) slides through the L-shaped plate (250); and the limiting plate (2902) is fixed to the end of the sliding rod body (2901).

6. The power tunnel culvert according to claim 1, characterized in that: The threaded rod (291) comprises a threaded rod body (2911) and a hand-held portion (2912); the threaded rod body (2911) is threadedly passed through the L-shaped plate (250); and the hand-held portion (2912) is fixed to the end of the threaded rod body (2911).

7. The power tunnel culvert according to claim 1, characterized in that: The inner shell (140) is in a horseshoe shape.

8. The power tunnel culvert according to claim 1, characterized in that: The base assembly (100) further comprises a support column (194), wherein the support column (194) is fixed between the lower surface of the cable support (170) and the inner wall of the inner shell (140).

9. The power tunnel culvert according to claim 1, characterized in that: At least three third locking members (2991) are provided on the hollow column (299), and the third locking members (2991) are axially equidistantly provided on the hollow column (299).

10. The power tunnel culvert according to claim 1, characterized in that: The length of the internal thread of the pipe (190) is not less than 50 mm.

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