Single-person gas maintenance equipment

The single-person fuel gas maintenance device addresses inefficiencies in existing equipment by providing a secure, single-person operation for long pipe replacement through a bearing and rotation mechanism, ensuring proper alignment and stability to prevent leaks.

CN223105482UActive Publication Date: 2025-07-15TIANJIN BINTOU XINZHI TECH CO LTD
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Patent Information

Application Number
CN202422136039.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-02
Publication Date
2025-07-15
Estimated Expiration
2034-09-02

AI Technical Summary

Technical Problem

In the prior art, multiple people need to operate the gas pipeline when replacing it, which cannot be completed by a single person, and the manual fixation is unstable, which can easily lead to incorrect connection of the pipeline joints and risk of leakage.

Method used

A single-person gas maintenance equipment is designed, including a load-bearing assembly, a rotating assembly and a fixing assembly. Through the combination of the rotating ring and the clamping member, the single-person fixing and tightening of the gas pipeline is achieved. The limit pin and adjustment bolts are used to ensure that the rotating ring rotates stably within the load-bearing ring, and the V-shaped groove of the clamping member ensures that the pipeline and the joint are aligned.

Benefits of technology

The gas pipeline replacement is achieved by a single person, avoiding the risk of improper connections and leakage of pipeline joints, and improving operational stability and efficiency.

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Abstract

The utility model provides single-person gas maintenance equipment. The single-person gas maintenance equipment comprises a bearing assembly, a rotating assembly and a fixing assembly. The bearing assembly comprises a bearing ring and a connecting piece; the bearing ring comprises an upper clamp and a lower clamp, the first ends of the upper clamp and the lower clamp are hinged, and the inner surfaces of the upper clamp and the lower clamp are provided with communicated sliding grooves. The rotating assembly comprises a rotating ring and a limiting pin, the rotating ring is rotatably arranged in the bearing ring, the axis of the rotating ring coincides with the axis of the bearing ring, and the limiting pin on the outer surface of the rotating ring extends into the sliding groove; the fixing assembly comprises two symmetrical clamping pieces arranged in the rotating ring, and a clamping gap is formed between the two clamping pieces. The rotating ring can be arranged on the gas pipeline in a sleeving mode and fixed to the gas pipeline through the clamping piece, the rotating ring can rotate in the bearing ring so that the gas pipeline and the pipeline connector can be screwed tightly, the bearing ring can bear the rotating ring on an external facility through the connecting piece, auxiliary fixing can be carried out when a long gas pipe is installed, and the gas pipe connector is convenient to use. And one-man maintenance operation can be realized.
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Description

Technical Field

[0001] The utility model belongs to the field of gas maintenance equipment, and particularly relates to a single-person gas maintenance equipment. Background Art

[0002] In order to ensure the safety of gas transportation and use, it is necessary to regularly inspect gas facilities, check for problems with gas facilities and pipelines, and repair or replace any problematic facilities or pipelines found. For pipelines that have been in use for a long time, are severely corroded, or have a risk of leakage, they need to be replaced. If the pipeline to be replaced is long, one operator needs to tighten the pipeline at the pipeline joint, and other operators are required to assist in fixing the direction of the pipeline during tightening. It cannot be operated by a single person, wasting human resources, and the manual fixing method is not stable enough, easily resulting in incorrect connection of the pipeline joints and potential leakage risks. Content of the Utility Model

[0003] In view of this, the utility model aims to provide a single-person gas maintenance equipment to assist in the pipeline replacement operation during gas maintenance.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] A single-person gas maintenance equipment, which includes: a bearing assembly, a rotating assembly, and a fixing assembly;

[0006] The bearing assembly includes a bearing ring and a connecting member, and the connecting member is disposed on the outer surface of the bearing ring; the bearing ring includes an upper clamp and a lower clamp, the first end of the upper clamp is hinged to the first end of the lower clamp, sliding grooves are provided on the inner surfaces of the upper clamp and the lower clamp, and the sliding grooves on the inner surfaces of the upper clamp and the lower clamp are communicated;

[0007] The rotating assembly includes a rotating ring and a limit pin, the rotating ring is rotatably disposed within the bearing ring, and the axis of the rotating ring coincides with the axis of the bearing ring. The limit pin is disposed on the outer surface of the rotating ring, and the limit pin is inserted into the sliding groove;

[0008] The fixing assembly is disposed within the rotating ring, and the fixing assembly includes two symmetrically disposed clamping members, and a clamping gap for accommodating a gas pipeline is formed between the two clamping members.

[0009] Furthermore, the fixing assembly further includes an adjusting bolt, one end of the adjusting bolt is rotatably connected to the inner surface of the rotating ring, a channel hole is provided on the rotating ring, the other end of the adjusting bolt extends out of the rotating ring along the channel hole on the rotating ring, and screw holes for accommodating the adjusting bolt are provided at the tops of the two clamping members.

[0010] Furthermore, a hinged ear plate is provided at the first end of the upper clamp and the first end of the lower clamp, and the hinged ear plate of the upper clamp and the hinged ear plate of the lower clamp are connected by a hinge shaft, and a locking ear plate is provided at the second end of the upper clamp and the second end of the lower clamp, and a lock is also provided on the locking ear plate for locking the two locking ear plates to each other.

[0011] Furthermore, the fixing assembly also includes a guide column, both ends of which are respectively connected to the inner surface of the rotating ring, and the axis of the guide column is parallel to the axis of the adjusting bolt, and the bottom ends of the two clamping members are provided with through holes for accommodating the guide column.

[0012] Furthermore, there are two limit pins, which are symmetrically arranged on the outer surface of the rotating ring.

[0013] Furthermore, the connecting piece is a suction cup.

[0014] Furthermore, the connecting piece is a clamp.

[0015] Furthermore, a V-shaped groove is provided on the side wall of the clamping member close to the clamping gap, and the V-shaped grooves on the two clamping members are relatively aligned.

[0016] Compared with the prior art, the one-person gas maintenance equipment described in the utility model has the following advantages:

[0017] (1) The rotating ring described in the utility model can be mounted on the gas pipeline to be installed, and the gas pipeline can be clamped by two symmetrical clamping members arranged inside the rotating ring, so that the rotating ring and the gas pipeline are relatively fixed. The bearing ring supports the rotating ring through the upper clamp and the lower clamp, and enables the rotating ring to rotate inside the bearing ring, so that the rotating ring can rotate when the gas pipeline and the pipeline joint are tightened. The sliding grooves on the inner surfaces of the upper clamp and the lower clamp can accommodate the limit pins on the outer surface of the rotating ring, ensuring that the rotating ring will not detach from the bearing ring during rotation, and the axes of the rotating ring and the bearing ring coincide, ensuring that the gas pipeline always maintains an angle aligned with the pipeline joint when the rotating ring rotates in the bearing ring, avoiding the risk of leakage of the gas pipeline after installation, and can realize single-person gas maintenance operations without the need for other operators when installing longer gas pipelines.

[0018] (2) The adjusting bolt described in the utility model can adjust the distance between the two clamping parts. By adjusting the adjusting bolt head located outside the rotating ring, the two clamping parts can be driven to move closer to each other or move away from each other, which is convenient for loosening and clamping the gas pipeline, and can be applied to gas pipelines of various diameters. The guide column arranged on the rotating ring can ensure that when the adjusting bolt adjusts the distance between the two clamping parts, the posture of the clamping parts remains consistent, and the gas pipeline can be clamped quickly and stably.

[0019] (3) For the upper clamping hoop of the present utility model, the end parts of the hinge ear plates on the upper clamping hoop and the lower clamping hoop, which are far away from the upper clamping hoop and the lower clamping hoop respectively, are connected to the hinge shaft, facilitating the opening and closing of the upper clamping hoop and the lower clamping hoop, ensuring the opening and closing space, and preventing the lack of sufficient opening space for inserting or removing the rotating ring due to being too close to the fixed position. The locking ear plates on the upper clamping hoop and the lower clamping hoop can be locked to each other through the lock buckle, enabling the upper clamping hoop and the lower clamping hoop to maintain a clamped state, and ensuring that the rotating ring can rotate stably within the bearing ring.

[0020] (4) The V-shaped grooves provided on the side walls of the two clamping members close to the clamping gap can clamp the gas pipeline in the center of the rotating ring, ensuring that when the rotating ring rotates inside the bearing ring, the clamped gas pipeline can maintain the axis position between the rotating ring and the bearing ring, guaranteeing that the gas pipeline is always aligned with the pipe joint during the tightening process and avoiding potential leakage risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0022] Figure 1 is a schematic structural diagram of a single-person gas maintenance equipment according to an embodiment of the present utility model;

[0023] Figure 2 is a top view of a single-person gas maintenance equipment according to an embodiment of the present utility model;

[0024] Figure 3 is a schematic structural diagram of a rotating assembly according to an embodiment of the present utility model;

[0025] Figure 4 is another state change diagram of a single-person gas maintenance equipment according to an embodiment of the present utility model.

[0026] DESCRIPTION OF THE REFERENCE NUMERALS:

[0027] 1 - adjustment section; 2 - adjustment bolt; 3 - upper clamping hoop; 4 - clamping gap; 5 - connecting member; 6 - hinge shaft; 7 - hinge ear plate; 8 - lower clamping hoop; 9 - rotating ring; 10 - guiding section; 11 - guide post; 12 - clamping section; 13 - lock buckle; 14 - adjustment bolt head; 15 - first limit pin; 16 - second limit pin; 17 - locking ear plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0031] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0032] A single-person gas maintenance equipment is used for auxiliary fixation when installing a long gas pipeline, such as Figure 1 , 2 as shown, and includes: a bearing assembly, a rotating assembly, and a fixing assembly;

[0033] The bearing assembly includes a bearing ring and a connecting member 5, and the connecting member is disposed on the outer surface of the bearing ring; the bearing ring is used to bear the rotating assembly, and the connecting member is used to fix the bearing ring on an external facility. Exemplarily, the connecting member may be a fixing component such as a suction cup, a hoop, a support seat, etc., and a suitable connecting member can be selected according to the fixed position. When the fixed position is a smooth surface, the bearing ring can be fixed by using a suction cup, and when the fixed position is other pipelines, the bearing ring can be fixed by using a hoop.

[0034] The bearing ring includes an upper clamp 3 and a lower clamp 8. The first end of the upper clamp is hinged to the first end of the lower clamp. Sliding grooves are provided on the inner surfaces of both the upper clamp and the lower clamp, and the sliding grooves on the inner surfaces of the upper clamp and the lower clamp are connected. The openings of the upper clamp and the lower clamp are arranged opposite to each other. When the upper clamp and the lower clamp are buckled together, they can form a ring for accommodating the rotating assembly. The upper clamp and the lower clamp can rotate and open around the hinged first end. After opening, the rotating assembly can be put in or taken out. When the upper clamp and the lower clamp are buckled together, they can carry the rotating assembly inside. The sliding grooves provided on the inner surface of the upper clamp and the inner surface of the lower clamp are connected. The sliding groove on the upper clamp and the sliding groove on the lower clamp together form an annular sliding groove, and this annular sliding groove is parallel to the circumferential direction of the bearing ring.

[0035] The rotating assembly includes a rotating ring 9 and a limit pin. As Figure 3 shown, the rotating ring is rotatably arranged inside the bearing ring, and the axis of the rotating ring coincides with the axis of the bearing ring. The limit pin is arranged on the outer surface of the rotating ring, and the limit pin is inserted into the inside of the sliding groove. The axial length of the rotating ring is greater than the axial length of the bearing ring. The two ends of the rotating ring in the axial direction respectively extend beyond the two ends of the bearing ring in the axial direction. The outer diameter of the rotating ring is slightly smaller than the inner diameter of the bearing ring. The outer surface of the rotating ring can fit on the inner surface of the bearing ring, so that the rotating ring can rotate inside the bearing ring, and when rotating, the rotating ring can be limited by the bearing ring to keep the axis of the rotating ring coinciding with the axis of the bearing ring. There are raised limit pins on the outer surface of the rotating ring. The height of the limit pins protruding from the outer surface of the rotating ring is less than the wall thickness of the bearing ring. The limit pins can extend into the sliding grooves connected on the inner surfaces of the upper clamp and the lower clamp to limit the axial direction of the rotating ring. The connected sliding grooves ensure that the limit pins will not be stuck when the rotating ring rotates inside the bearing ring, ensuring that the rotatable angle of the rotating ring inside the bearing ring is not restricted, and the rotating ring will not break away from the bearing ring when rotating. An optional implementation manner of this embodiment is that, in order to improve the stability of the rotating ring when rotating inside the bearing ring, the limit pin includes a first limit pin 15 and a second limit pin 16. The first limit pin and the second limit pin are symmetrically arranged on the outer surface of the rotating ring. The connection line between the centers of the first limit pin and the second limit pin passes through the axis center of the rotating ring. Both the first limit pin and the second limit pin can extend into the sliding grooves on the inner surfaces of the upper clamp and the lower clamp, so that the rotating ring can rotate more stably inside the bearing ring, and it is not easy to generate axis deflection and axial displacement during the rotation process.

[0036] The fixing assembly is arranged inside the rotating ring. The fixing assembly includes two symmetrically arranged clamping members, and a clamping gap 4 for accommodating the gas pipeline is formed between the two clamping members. After the rotating ring is sleeved on the gas pipeline, the two clamping members can symmetrically clamp the gas pipeline located in the clamping gap to fix the rotating ring on the gas pipeline.

[0037] Optionally, in order to facilitate the clamping or loosening of the gas pipeline of the rotating ring set, the fixing assembly further includes an adjusting bolt 2. One end of the adjusting bolt is rotatably connected to the inner surface of the rotating ring. A channel hole is provided on the rotating ring. The other end of the adjusting bolt extends out of the rotating ring along the channel hole on the rotating ring, and threaded holes for accommodating the adjusting bolt are provided at the tops of the two clamping members. The axial direction of the adjusting bolt is perpendicular to the axial direction of the rotating ring. The adjusting bolt is arranged on the part of the rotating ring extending beyond the bearing ring. Correspondingly, the two clamping members are also arranged inside the rotating ring extending beyond the bearing ring. The adjusting bolt is used to adjust the distance between the two clamping members. The adjusting bolt is screwed into the threaded holes provided at the tops of the two clamping members respectively. Rotating the adjusting bolt can drive the two clamping members to move closer to each other or move away from each other. One end of the adjusting bolt is rotatably connected to the inner surface of the rotating ring, so that the adjusting bolt will not have axial displacement when rotating, ensuring the stability of the adjusting bolt when adjusting the distance between the two clamping members. At the same time, in order to facilitate the operation of the adjusting bolt, a channel hole is provided on the rotating ring. The other end of the adjusting bolt extends out of the rotating ring along the channel hole. The other end of the adjusting bolt is the adjusting bolt head 14. By operating the adjusting bolt head located outside the rotating ring, the adjusting bolt can be rotated, so as to control the two clamping members to move closer to each other or move away from each other, and the gas pipeline in the clamping gap can be clamped or loosened conveniently. And because the distance between the two clamping members is adjustable, it can also be applicable to the clamping, auxiliary fixing and installation of gas pipelines with various diameters.

[0038] To facilitate the insertion or removal of the rotating ring from inside the bearing ring, as Figure 1 , 4 shown, hinge lugs 7 are provided at the first ends of both the upper clamp and the lower clamp. The hinge lug of the upper clamp and the hinge lug of the lower clamp are connected by a hinge shaft 6. Locking lugs 17 are provided at the second ends of both the upper clamp and the lower clamp. A lock 13 for locking the two locking lugs to each other is further provided on the locking lug. The end of the hinge lug on the upper clamp away from the upper clamp and the end of the hinge lug on the lower clamp away from the lower clamp are respectively connected to the hinge shaft. The hinge shaft is connected to the connecting member, ensuring that the upper clamp and the lower clamp have an opening and closing space for rotating around the hinge shaft, and will not have insufficient opening space due to being too close to the fixed position, and cannot be opened to an angle that allows the rotating ring to be inserted or removed. The lock is rotatably arranged at the end of the locking lug on the lower clamp away from the lower clamp. When the upper clamp and the lower clamp are buckled with each other, the lock can buckle the end of the locking lug on the second end of the upper clamp away from the upper clamp, locking the locking lug on the upper clamp and the locking lug on the lower clamp to each other, so that the upper clamp and the lower clamp can maintain the state of being buckled with each other, thus stably bearing the rotation of the rotating ring inside.

[0039] To ensure that the two clamping members can quickly clamp or release the gas pipeline in the clamping gap, the fixing assembly further includes a guide post. The two ends of the guide post are respectively connected to the inner surface of the rotating ring, and the axis of the guide post is parallel to the axis of the adjusting bolt. Through holes for accommodating the guide post are provided at the bottom ends of the two clamping members. The two ends of the guide post are respectively fixed on the inner surface of the rotating ring, and the axis of the guide post is parallel to the axis of the adjusting bolt. The two clamping members are slidably connected to the guide post through the through holes at the bottom ends. When the adjusting bolt drives the two clamping members to move closer to or away from each other, the bottom ends of the two clamping members can slide along the guide post, enabling the two clamping members to maintain a stable posture during movement and quickly clamp or release the gas pipeline in the clamping gap without adjusting the posture of the clamping members.

[0040] An optional implementation manner of this embodiment is that V-shaped grooves are provided on the side walls of the clamping members close to the clamping gap, and the V-shaped grooves on the two clamping members are opposite to each other. The clamping member in this embodiment includes a clamping section 12, an adjusting section 1, and a guiding section 10. The clamping section is a horizontally arranged V shape. The adjusting section is arranged at the top end of the clamping section, and a threaded hole screwed with the adjusting bolt is provided on the adjusting section. The guiding section is arranged at the bottom end of the clamping section, and a through hole through which the guide post can pass is provided on the guiding section. The openings of the clamping sections of the two clamping members are arranged opposite to each other, so that when the two clamping sections move closer to each other, the gas pipeline can be clamped at the central position of the rotating ring. When the rotating ring rotates in the bearing ring, the gas pipeline can be kept at the axis position of the rotating ring and the bearing ring, ensuring the alignment of the gas pipeline with the pipeline joint during the installation process and avoiding potential leakage risks.

[0041] The usage method of the present utility model is as follows: First, operate the head of the adjusting bolt outside the rotating ring to make the two clamping members move away from each other. Then, sleeved the rotating ring on the gas pipeline from one end of the gas pipeline to be installed. After adjusting the rotating ring to a suitable position, operate the head of the adjusting bolt again to make the two clamping members move closer to each other, clamp the gas pipeline and fix it relative to the rotating ring. Then, place the rotating ring into the bearing ring fixed in the required position in advance, buckle the upper clamp and the lower clamp, and finally lock the locking ear plates on the upper clamp and the lower clamp with each other through the lock, that is, the auxiliary fixing of the gas pipeline is completed, and the gas pipeline can be screwed with the pipeline joint; after the installation of the gas pipeline is completed, the lock can be opened to release the locking of the upper clamp and the lower clamp, and then operate the head of the adjusting bolt to release the two clamping members, and the rotating ring can be removed from the unconnected end of the gas pipeline.

[0042] The utility model clamps a gas pipeline through two symmetric clamping pieces, fixes the gas pipeline to a rotating ring, an upper clamp and a lower clamp can bear the rotating ring so that the rotating ring can rotate within a bearing ring, a limiting pin on the outer surface of the rotating ring ensures that the rotating ring will not break away from the bearing ring during the rotation process, the interconnected sliding grooves do not limit the rotation angle of the rotating ring and do not hinder the rotation of the rotating ring when the gas pipeline is tightened, the V-shaped clamping surface of the clamping piece can clamp the gas pipeline at the axial position of the rotating ring, making the gas pipeline always aligned with the pipeline joint during the installation process, avoiding potential leakage risks, and can assist in fixing when installing a longer gas pipeline, and single-person maintenance operation can be realized.

[0043] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A single-person gas maintenance equipment, characterized in that, Comprising: a bearing component, a rotating component and a fixing component; The bearing component includes a bearing ring and a connecting member (5), and the connecting member (5) is disposed on the outer surface of the bearing ring; the bearing ring includes an upper clamp (3) and a lower clamp (8), a first end of the upper clamp (3) is hinged to a first end of the lower clamp (8), sliding grooves are provided on inner surfaces of the upper clamp (3) and the lower clamp (8), and the sliding grooves on the inner surfaces of the upper clamp (3) and the lower clamp (8) are communicated with each other; The rotating component includes a rotating ring (9) and a limit pin, the rotating ring (9) is rotatably disposed within the bearing ring, and an axis of the rotating ring (9) coincides with an axis of the bearing ring, the limit pin is disposed on an outer surface of the rotating ring (9), and the limit pin is inserted into the sliding groove; The fixing component is disposed within the rotating ring, the fixing component includes two symmetrically disposed clamping members, and a clamping gap (4) for accommodating a gas pipeline is formed between the two clamping members.

2. The single-person gas maintenance equipment according to claim 1, characterized in that: The fixing component further includes an adjusting bolt (2), one end of the adjusting bolt is rotatably connected to an inner surface of the rotating ring (9), a through hole is provided on the rotating ring (9), the other end of the adjusting bolt extends out of the rotating ring (9) along the through hole on the rotating ring (9), and screw holes for accommodating the adjusting bolt (2) are provided at tops of the two clamping members.

3. A single-person gas maintenance equipment according to claim 1, characterized in that: Hinge ear plates (7) are provided at first ends of the upper clamp (3) and the lower clamp (8), the hinge ear plate of the upper clamp (3) and the hinge ear plate (7) of the lower clamp (8) are connected by a hinge shaft (6), locking ear plates (17) are provided at second ends of the upper clamp (3) and the lower clamp (8), and a lock (13) for locking the two locking ear plates (17) to each other is further provided on the locking ear plate (17).

4. A single-person gas maintenance equipment according to claim 2, characterized in that: The fixing component further includes a guide post (11), two ends of the guide post (11) are respectively connected to an inner surface of the rotating ring (9), an axis of the guide post (11) is parallel to an axis of the adjusting bolt (2), and through holes for accommodating the guide post (11) are provided at bottoms of the two clamping members.

5. A single-person gas maintenance equipment according to claim 1, characterized in that: There are two limit pins, and the two limit pins are symmetrically arranged on the outer surface of the rotating ring (9).

6. A single-person gas maintenance equipment according to claim 1, characterized in that: The connecting member (5) is a suction cup.

7. A single-person gas maintenance equipment according to claim 1, characterized in that: The connecting member (5) is a hoop.

8. A single-person gas maintenance equipment according to claim 1, characterized in that: V-shaped grooves are provided on side walls of the clamping members close to the clamping gap (4), and the V-shaped grooves on the two clamping members are opposite to each other.