Pipeline cutting equipment for building engineering construction

Abstract

The invention belongs to the technical field of constructional engineering construction, and provides pipeline cutting equipment for constructional engineering construction, which comprises an operation table, two groups of mounting plates are arranged at the top of the operation table, mounting rings are fixedly connected to the upper parts of the two groups of mounting plates, and clamping assemblies for clamping pipelines are arranged in the mounting rings. An adjusting assembly used for adjusting the positions of the mounting plates and the mounting rings is arranged at the joint of one mounting plate and the operation table, a mounting base is fixedly connected to one side of the operation table, and a cutting machine is mounted at the top of the mounting base. According to the pipeline cutting device, pipelines with different diameters and lengths can be supported and clamped, the cutting length of the pipeline can be determined through the positioning plate, and compared with manual measurement, the pipeline cutting device is more accurate and simpler and more convenient to operate.

Description

Technical Field

[0001] The invention belongs to the technical field of building engineering construction, in particular to a pipe cutting device for building engineering construction. Background Art

[0002] The construction of a building project is a systematic process from early preparation to final delivery. In the early stage, it is necessary to complete the approval preparation work such as drawing design and review, construction plan preparation and site "three connections and one leveling". During construction, it is carried out according to the process of foundation engineering, main structure engineering, enclosure structure and decoration engineering, and mechanical and electrical installation engineering. During this period, key technologies such as high-rise building construction and large-volume concrete are used, and implementation is guaranteed by progress, quality, and safety management. Finally, it is delivered after passing the phased acceptance and final acceptance.

[0003] During the construction process of a building project, it is necessary to cut the pipes to meet specific lengths and installation requirements. However, the current pipe cutting equipment has a relatively simple structure, and its mechanism for clamping the pipes is mostly unable to be adjusted. It can only clamp and fix pipes of fixed diameters. At the same time, it is also unable to adjust the total length between the clamping mechanisms, making it difficult to support pipes of different lengths. The scope of application is relatively small. Finally, during the cutting process, most workers manually measure the cutting length. This method is not only inaccurate, but also cumbersome, which in turn affects work efficiency.

[0004] Therefore, those skilled in the art have proposed a pipe cutting device for construction engineering to solve the problems raised in the background art. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a pipe cutting device for construction engineering construction, so as to solve the problems in the prior art of being unable to support and clamp pipes of different lengths and diameters, and the low precision of manual measurement of cutting length while the process is relatively cumbersome.

[0006] A pipe cutting device for construction engineering, comprising an operating table, with two sets of mounting plates provided on the top of the operating table, mounting rings fixedly connected to the tops of both sets of mounting plates, clamping assemblies for clamping pipes provided inside the mounting rings, an adjustment assembly for adjusting the position of the mounting plates and mounting rings provided at the connection between one set of mounting plates and the operating table, a mounting seat fixedly connected to one side of the operating table, and a cutting machine mounted on the top of the mounting seat; The clamping assembly includes a cavity, a through groove, a push rod, a top plate and a rubber pad. The cavity is annular and is opened inside the mounting ring. The through groove passes through the inner wall of the cavity on one side close to the center of the mounting ring. The push rod is slidably connected to the through groove and its end located in the cavity is arc-shaped. The top plate is fixedly connected to the end of the push rod away from the cavity, and the rubber pad is fixedly connected to the side of the top plate away from the push rod.

[0007] Preferably, the adjustment assembly includes an adjustment slot, an adjustment block, a guide slot, a guide block, a fixing hole and a fixing rod. The adjustment slot is opened at the top of the operating table and is located under a group of mounting plates. The adjustment block is movably connected to the bottom of a group of mounting plates and is slidably connected to the adjustment slot. The guide slot is opened on the inner walls on both sides of the adjustment slot. The guide block is fixedly connected to both sides of the adjustment block and is slidably connected to the guide slot. The fixing holes are provided in several groups and are opened on both sides of the top of the adjustment slot.

[0008] Preferably, the clamping assembly also includes a swivel, an arc block, a first slider, a first slide groove and a first spring. The swivel is rotatably connected to the cavity, the arc block is fixedly connected to one side of the swivel close to the center of the mounting ring, the first slide groove is opened on one side surface of the mounting ring and is connected to the cavity, the first slider is fixedly connected to the swivel and slidably connected to the first slide groove, the first spring is installed inside the first slide groove and its two ends are respectively fixedly connected to one side of the first slider and the inner wall of one side of the first slide groove.

[0009] Preferably, the clamping assembly also includes a second slide groove, a second slider and a second spring, the second slide groove is opened on the inner wall of one side of the cavity and is on the side of the push rod, the second slider is fixedly connected to one side of the push rod and is slidably connected to the second slide groove, the second spring is installed inside the second slide groove and its two ends are respectively fixedly connected to the side of the second slider away from the swivel and the inner wall of the side of the second slide groove away from the swivel, and the elastic force of the first spring is greater than the sum of the elastic forces of multiple groups of second springs.

[0010] Preferably, the fixing rod is fixedly connected to the bottom of a set of mounting plates and is adapted to the size of the fixing hole.

[0011] Preferably, the adjusting assembly also includes a third slide groove, a connecting groove, a connecting rod, a third slider and a third spring, the third slide groove is opened inside the adjusting block, the connecting groove passes through the inner wall of the top of the third slide groove, the connecting rod is fixedly connected to the bottom of a group of mounting plates and extends into the inside of the third slide groove through the connecting groove, the third slider is fixedly connected to the bottom of the connecting rod and is slidably connected to the third slide groove, the third spring is sleeved on the outer periphery of the connecting rod and its two ends are respectively fixedly connected to the top of the third slider and the inner wall of the top of the third slide groove.

[0012] Preferably, a positioning assembly for determining the cutting length of the pipe is provided at a position on the top of the operating table away from the mounting plate; the positioning assembly includes a positioning plate, scale lines, a drive groove and a drive block, the positioning plate is movably connected to the top of the operating table, the scale lines are evenly sprayed on one side surface of the operating table, the drive groove is opened on the top surface of the operating table, and the drive block is fixedly connected to the bottom of the positioning plate and slidably connected to the drive groove.

[0013] Preferably, the positioning assembly also includes a screw, a rotating groove, a rotating rod and a rotating handle, the two ends of the screw are respectively rotatably connected to the inner walls on both sides of the driving groove, the screw passes through and is threadedly connected to the driving block, the rotating groove passes through the inner wall of one side of the driving groove, the rotating rod is fixedly connected to one end of the screw and rotatably connected to the rotating groove, and the rotating handle is fixedly connected to the other end of the rotating rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects: When the push rod drives the top plate and the rubber pad to move until they are closely fitted with the pipe, the pipe can be fixed to the center of the mounting ring by the elastic force of the first spring. This design enables the device to clamp and fix pipes of different sizes through the clamping plate.

[0015] When the fixing hole moves downward with the mounting plate to be inserted into the fixing hole at the current position, the mounting plate can be fixed in the current position. This design enables the device to support pipes of different lengths by adjusting the positions of the two sets of mounting rings.

[0016] 3. The present invention is provided with a positioning assembly. Rotating the handle drives the rotating rod to rotate along the rotating groove, and the rotating rod drives the screw to rotate in the driving groove. Since the screw penetrates and is threadedly connected to the driving block, the driving block will slide along the driving groove as the screw rotates, thereby adjusting the position of the positioning plate. The positioning plate is adjusted to a suitable position according to the scale line. This design enables the device to determine the cutting length of the pipe through the positioning plate. Compared with manual measurement, it is not only more accurate but also easier to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the clamping assembly structure of the present invention Figure 1 ; Figure 3 for Figure 1 Enlarged view of point A in the middle; Figure 4 Schematic diagram of the clamping assembly structure of the present invention Figure 2 ; Figure 5 for Figure 1 Enlarged view of point B in the middle; Figure 6 Schematic diagram of the adjustment component structure of the present invention Figure 1 ; Figure 7 Schematic diagram of the adjustment component structure of the present invention Figure 2 ; Figure 8 This is a structural diagram of the positioning component of the present invention.

[0018] In the picture: 1. Operating table; 2. Mounting plate; 3. Mounting ring; 4. Clamping assembly; 41. Cavity; 42. Through slot; 43. Push rod; 44. Top plate; 45. Rubber pad; 46. Swivel; 47. Arc block; 48. First slider; 49. First slide; 410. First spring; 411. Second slide; 412. Second slider; 413. Second spring; 5. Adjusting assembly; 51. Adjusting slot; 52. Adjusting block; 53. Guide slot; 54. Guide block; 55. Fixing hole; 56. Fixing rod; 57. Third slide; 58. Connecting slot; 59. Connecting rod; 510. Third slider; 511. Third spring; 6. Mounting seat; 7. Cutting machine; 8. Positioning assembly; 81. Positioning plate; 82. Scale line; 83. Drive slot; 84. Drive block; 85. Screw; 86. Rotating slot; 87. Rotating rod; 88. Rotating handle DETAILED DESCRIPTION

[0019] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0020] As attached Figure 1 To the attached Figure 8 As shown: Embodiment 1: The present invention provides a pipe cutting device for construction engineering, including an operating table 1, two groups of mounting plates 2 are arranged on the top of the operating table 1, and mounting rings 3 are fixedly connected above the two groups of mounting plates 2. A clamping assembly 4 for clamping the pipe is arranged inside the mounting ring 3, and the clamping assembly 4 includes a cavity 41, a through groove 42, a push rod 43, a top plate 44, a rubber pad 45, a swivel 46, an arc block 47, a first slider 48, a first slide groove 49, a first spring 410, a second slide groove 411, a second slider 412 and a second spring 413. A mounting seat 6 is fixedly connected to one side of the operating table 1, and a cutting machine 7 is installed on the top of the mounting seat 6.

[0021] Furthermore, the cavity 41 is annular and is opened inside the mounting ring 3, the through groove 42 runs through the inner wall of the cavity 41 on one side close to the center of the mounting ring 3, the top rod 43 is slidably connected to the through groove 42 and its end located in the cavity 41 is arc-shaped, the top plate 44 is fixedly connected to the end of the top rod 43 away from the cavity 41, the rubber pad 45 is fixedly connected to the side of the top plate 44 away from the top rod 43, the swivel 46 is rotatably connected to the cavity 41, the arc block 47 is fixedly connected to the side of the swivel 46 close to the center of the mounting ring 3, the first slide groove 49 is opened on the surface of one side of the mounting ring 3 and is connected to the cavity 41, and the first slider 48 is fixedly connected to the swivel 46 and slides. It is connected to the first slide groove 49, the first spring 410 is installed inside the first slide groove 49 and its two ends are respectively fixedly connected to one side of the first slider 48 and the inner wall of the first slide groove 49, the second slide groove 411 is opened on the inner wall of one side of the cavity 41 and is on the side of the push rod 43, the second slider 412 is fixedly connected to one side of the push rod 43 and is slidably connected to the second slide groove 411, the second spring 413 is installed inside the second slide groove 411 and its two ends are respectively fixedly connected to the side of the second slider 412 away from the swivel 46 and the inner wall of the side of the second slide groove 411 away from the swivel 46, the elastic force of the first spring 410 is greater than the sum of the elastic forces of multiple groups of second springs 413.

[0022] As can be seen from the above, the first slider 48 is slid along the first slide groove 49 to squeeze the first spring 410. During this process, the swivel 46 will drive the arc block 47 to rotate in the cavity 41 along with the first slider 48. When the arc block 47 moves away from the rear of the push rod 43, the second spring 413 rebounds and can drive the push rod 43 to move toward the inside of the cavity 41 through the second slider 412. When the first slider 48 is released, the first spring 410 rebounds and can drive the swivel 46 and the arc block 47 to move in the opposite direction through the first slider 48. When the arc block 47 contacts the push rod 43, since the elastic force of the first spring 410 is greater than the sum of the elastic forces of multiple groups of second springs 413, the arc block 47 will push the push rod 43 toward the center of the mounting ring 3 and squeeze the second spring 413 through the second slider 412.

[0023] Embodiment 2: This embodiment is basically the same as the previous embodiment, except that an adjustment component 5 for adjusting the position of the mounting plate 2 and the mounting ring 3 is provided at the connection between a set of mounting plates 2 and the operating table 1. The adjustment component 5 includes an adjustment groove 51, an adjustment block 52, a guide groove 53, a guide block 54, a fixing hole 55, a fixing rod 56, a third slide groove 57, a connecting groove 58, a connecting rod 59, a third slider 510 and a third spring 511.

[0024] Furthermore, an adjusting slot 51 is provided at the top of the operating table 1 and is located below a group of mounting plates 2; an adjusting block 52 is movably connected to the bottom of a group of mounting plates 2 and is slidably connected to the adjusting slot 51; guide slots 53 are provided on the inner walls on both sides of the adjusting slot 51; guide blocks 54 are fixedly connected to both sides of the adjusting block 52 and are slidably connected to the guide slots 53; several groups of fixing holes 55 are provided and are provided on both sides of the top of the adjusting slot 51; a fixing rod 56 is fixedly connected to the bottom of a group of mounting plates 2 and is adapted to the size of the fixing holes 55; a third slide 57 is provided inside the adjusting block 52; a connecting slot 58 passes through the inner wall at the top of the third slide 57; a connecting rod 59 is fixedly connected to the bottom of a group of mounting plates 2 and extends through the connecting slot 58 to the inside of the third slide 57; a third slider 510 is fixedly connected to the bottom of the connecting rod 59 and is slidably connected to the third slide 57; a third spring 511 is sleeved on the outer periphery of the connecting rod 59 and its two ends are respectively fixedly connected to the top of the third slider 510 and the inner wall at the top of the third slide 57.

[0025] As can be seen from the above, by pulling the mounting plate 2 upward, the third slider 510 can be driven to slide upward along the third slide groove 57 through the connecting rod 59 and squeeze the third spring 511. When the fixing rod 56 moves upward with the mounting plate 2 to move out of the fixing hole 55, the adjusting block 52 is slid along the adjusting groove 51 to drive the mounting plate 2 to move synchronously through the connecting rod 59. During this process, the guide block 54 will slide synchronously with the adjusting block 52 along the guide groove 53 and limit and guide it. After moving to the appropriate position, the mounting plate 2 is released, and the third spring 511 rebounds to drive the mounting plate 2 to move downward through the third slider 510 and the connecting rod 59. When the fixing hole 55 moves downward with the mounting plate 2 to be inserted into the fixing hole 55 at the current position, the mounting plate 2 can be fixed at the current position.

[0026] Example 3: This example is basically the same as the previous example, except that a positioning assembly 8 for determining the pipe cutting length is provided at a position on the top of the operating table 1 away from the mounting plate 2. The positioning assembly 8 includes a positioning plate 81, a scale line 82, a drive groove 83, a drive block 84, a screw 85, a rotating groove 86, a rotating rod 87 and a rotating handle 88.

[0027] Furthermore, the positioning plate 81 is movably connected to the top of the operating table 1, the scale line 82 is evenly sprayed on the surface of one side of the operating table 1, the driving groove 83 is opened on the top surface of the operating table 1, the driving block 84 is fixedly connected to the bottom of the positioning plate 81 and is slidably connected to the driving groove 83, and the two ends of the screw 85 are respectively rotatably connected to the inner walls on both sides of the driving groove 83, the screw 85 passes through and is threadedly connected to the driving block 84, the rotating groove 86 passes through the inner wall of one side of the driving groove 83, the rotating rod 87 is fixedly connected to one end of the screw 85 and is rotatably connected to the rotating groove 86, and the turning handle 88 is fixedly connected to the other end of the rotating rod 87.

[0028] As can be seen from the above, rotating the handle 88 can drive the rotating rod 87 to rotate along the rotating groove 86, and the rotating rod 87 drives the screw 85 to rotate in the driving groove 83. Since the screw 85 passes through and is threadedly connected to the driving block 84, the driving block 84 will slide along the driving groove 83 as the screw 85 rotates, thereby adjusting the position of the positioning plate 81, and the cutting length of the pipe can be intuitively observed according to the scale line 82.

[0029] Working principle: First, pull the mounting plate 2 upward so that it drives the third slider 510 to slide upward along the third slide groove 57 through the connecting rod 59 and squeeze the third spring 511. When the fixing rod 56 moves upward with the mounting plate 2 to move out of the fixing hole 55, the adjusting block 52 is slid along the adjusting groove 51 to drive the mounting plate 2 to move synchronously through the connecting rod 59, and the mounting plate 2 drives the mounting ring 3 to move. During this process, the guide block 54 will slide synchronously with the adjusting block 52 along the guide groove 53 and limit it. When the mounting ring 3 moves to the position where the two sets of mounting rings 3 can support the pipe, the mounting plate 2 is released and the third The spring 511 rebounds and drives the mounting plate 2 to move downward through the third slider 510 and the connecting rod 59. When the fixing hole 55 moves downward with the mounting plate 2 to be inserted into the fixing hole 55 at the current position, the mounting plate 2 can be fixed at the current position. Then, the first slider 48 is slid along the first slide groove 49 to squeeze the first spring 410. During this process, the swivel 46 drives the arc block 47 to rotate in the cavity 41 along with the first slider 48. When the arc block 47 moves away from the rear of the ejector rod 43, the second spring 413 rebounds and drives the ejector rod 43 to move toward the inside of the cavity 41 through the second slider 412. When the top plate 44 and the rubber pad 45 move along When the push rod 43 moves to the edge closest to the inner ring of the mounting ring 3, the pipe to be cut is passed through the mounting ring 3 and one end of the pipe is tightly fitted with the positioning plate 81. Then the first slider 48 is released, the first spring 410 rebounds and drives the swivel 46 and the arc block 47 to move in the opposite direction through the first slider 48. When the arc block 47 contacts the push rod 43, since the elastic force of the first spring 410 is greater than the sum of the elastic forces of the multiple groups of second springs 413, the arc block 47 will push the push rod 43 out toward the center of the mounting ring 3 and squeeze the second spring 413 through the second slider 412. When the push rod 43 drives the top plate 44 and the rubber pad 45 to move to a position close to the pipe When fitted, the pipe can be fixed in the center of the mounting ring 3 by the elastic force of the first spring 410, and then the cutting machine 7 can be started to cut it. When the cutting length of the pipe needs to be adjusted, the turning handle 88 is turned to drive the turning rod 87 to rotate along the turning groove 86, and the turning rod 87 drives the screw 85 to rotate in the driving groove 83. Since the screw 85 passes through and is threadedly connected to the driving block 84, the driving block 84 will slide along the driving groove 83 as the screw 85 rotates, thereby adjusting the position of the positioning plate 81. The positioning plate 81 is adjusted to a suitable position according to the scale line 82. At this time, the pipe can be cut to different lengths.

[0030] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present invention. Any changes, modifications, replacements and variations of the above embodiments by ordinary technicians in this field within the scope of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pipe cutting device for construction engineering, comprising an operating table (1), wherein two sets of mounting plates (2) are provided on the top of the operating table (1), mounting rings (3) are fixedly connected to the tops of the two sets of mounting plates (2), and a clamping assembly (4) for clamping the pipe is provided inside the mounting ring (3), characterized in that: An adjusting assembly (5) for adjusting the position of the mounting plate (2) and the mounting ring (3) is provided at the connection between one set of the mounting plates (2) and the operating table (1); a mounting seat (6) is fixedly connected to one side of the operating table (1); and a cutting machine (7) is installed on the top of the mounting seat (6); The clamping assembly (4) comprises a cavity (41), a through groove (42), a push rod (43), a top plate (44) and a rubber pad (45), wherein the cavity (41) is annular and is opened inside the mounting ring (3), the through groove (42) passes through the inner wall of the cavity (41) on one side close to the center of the mounting ring (3), the push rod (43) is slidably connected to the through groove (42) and one end thereof located in the cavity (41) is arc-shaped, the top plate (44) is fixedly connected to one end of the push rod (43) away from the cavity (41), and the rubber pad (45) is fixedly connected to the side of the top plate (44) away from the push rod (43).

2. A pipe cutting device for construction engineering as claimed in claim 1, characterized in that: The adjustment assembly (5) comprises an adjustment slot (51), an adjustment block (52), a guide slot (53), a guide block (54), a fixing hole (55) and a fixing rod (56). The adjustment slot (51) is opened on the top of the operating table (1) and is located below a group of mounting plates (2). The adjustment block (52) is movably connected to the bottom of a group of mounting plates (2) and is slidably connected to the adjustment slot (51). The guide slot (53) is opened on the inner walls on both sides of the adjustment slot (51). The guide block (54) is fixedly connected to both sides of the adjustment block (52) and is slidably connected to the guide slot (53). The fixing holes (55) are provided in a plurality of groups and are opened on both sides of the top of the adjustment slot (51).

3. A pipe cutting device for construction engineering as claimed in claim 2, characterized in that: The clamping assembly (4) further includes a rotating ring (46), an arc block (47), a first slider (48), a first slide groove (49) and a first spring (410), wherein the rotating ring (46) is rotatably connected to the cavity (41), the arc block (47) is fixedly connected to a side of the rotating ring (46) close to the center of the mounting ring (3), the first slide groove (49) is opened on a side surface of the mounting ring (3) and is connected to the cavity (41), the first slider (48) is fixedly connected to the rotating ring (46) and slidably connected to the first slide groove (49), and the first spring (410) is installed inside the first slide groove (49) and its two ends are respectively fixedly connected to one side of the first slider (48) and the inner wall of one side of the first slide groove (49).

4. A pipe cutting device for construction engineering as claimed in claim 3, characterized in that: The clamping assembly (4) further includes a second slide groove (411), a second slider (412) and a second spring (413), wherein the second slide groove (411) is opened on the inner wall of one side of the cavity (41) and is located on the side of the push rod (43), the second slider (412) is fixedly connected to the side of the push rod (43) and is slidably connected to the second slide groove (411), the second spring (413) is installed inside the second slide groove (411) and its two ends are respectively fixedly connected to the side of the second slider (412) away from the rotating ring (46) and the inner wall of the side of the second slide groove (411) away from the rotating ring (46), and the elastic force of the first spring (410) is greater than the sum of the elastic forces of multiple groups of second springs (413).

5. A pipe cutting device for construction engineering as claimed in claim 4, characterized in that: The fixing rod (56) is fixedly connected to the bottom of a set of mounting plates (2) and is adapted to the size of the fixing hole (55).

6. A pipe cutting device for construction engineering as claimed in claim 5, characterized in that: The adjustment assembly (5) further includes a third slide groove (57), a connecting groove (58), a connecting rod (59), a third slider (510) and a third spring (511), wherein the third slide groove (57) is opened inside the adjustment block (52), the connecting groove (58) passes through the inner wall of the top of the third slide groove (57), the connecting rod (59) is fixedly connected to the bottom of a group of mounting plates (2) and extends to the inside of the third slide groove (57) through the connecting groove (58), the third slider (510) is fixedly connected to the bottom of the connecting rod (59) and is slidably connected to the third slide groove (57), and the third spring (511) is sleeved on the outer periphery of the connecting rod (59) and its two ends are respectively fixedly connected to the top of the third slider (510) and the inner wall of the top of the third slide groove (57).

7. A pipe cutting device for construction engineering as claimed in claim 6, characterized in that: A positioning assembly (8) for determining the pipe cutting length is provided at a position on the top of the operating table (1) away from the mounting plate (2); the positioning assembly (8) comprises a positioning plate (81), a scale line (82), a driving groove (83) and a driving block (84); the positioning plate (81) is movably connected to the top of the operating table (1); the scale line (82) is evenly sprayed on a side surface of the operating table (1); the driving groove (83) is opened on the top surface of the operating table (1); and the driving block (84) is fixedly connected to the bottom of the positioning plate (81) and slidably connected to the driving groove (83).

8. A pipe cutting device for construction engineering as claimed in claim 7, characterized in that: The positioning assembly (8) further includes a screw (85), a rotating groove (86), a rotating rod (87) and a rotating handle (88), wherein the two ends of the screw (85) are respectively rotatably connected to the inner walls on both sides of the driving groove (83), the screw (85) passes through and is threadedly connected to the driving block (84), the rotating groove (86) passes through the inner wall of one side of the driving groove (83), the rotating rod (87) is fixedly connected to one end of the screw (85) and is rotatably connected to the rotating groove (86), and the rotating handle (88) is fixedly connected to the other end of the rotating rod (87).

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