Conveying limiting mechanism of steel pipe machining production line

Abstract

The conveying limiting mechanism of the steel pipe machining production line comprises a base support, a limiting cutting assembly is arranged at one end of the base support, a lifting driving mechanism is arranged on one side in the base support, rotating shaft seats are fixedly connected to the two sides of one end of the base support, and a steel pipe supporting plate is rotationally connected between the two rotating shaft seats; a thread conveying assembly is arranged on one side of the surface of the steel pipe supporting plate, an auxiliary conveying assembly is arranged on the other side of the surface of the steel pipe supporting plate, a pipe end positioning mechanism is arranged at one end of the surface of the steel pipe supporting plate, and a second connecting base is fixedly connected to one side of the bottom of the steel pipe supporting plate. According to the device, under the action of gravity and the vibrator, the ends, close to the cutter, of the multiple inclined steel pipes make contact with the surface of the positioning baffle, end alignment and positioning are completed, convenience and rapidness are achieved, then fixed-length cutting can be directly conducted, alignment conducted by cutting once is not needed, and the machining efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel pipe processing, in particular to a conveying and limiting mechanism of a steel pipe processing production line. BACKGROUND

[0002] Steel pipe is a kind of hollow steel material widely used in petroleum, chemical industry, medical treatment, food, light industry, mechanical instrument and other industrial fields, which can be used for conveying fluid and powder solid, exchanging heat energy, manufacturing mechanical parts and containers, etc., and is an economic steel material. The processing of steel pipe includes multiple processes, and one of the more common processes is fixed-length cutting. According to the needs of consumers, the steel pipe of a regular length is cut into steel pipes of equal length, which is convenient for subsequent use of consumers. A conveying and limiting mechanism of a steel pipe processing production line in the prior art clamps a plurality of steel pipes by a group of clamping assemblies and a clamp beside a cutter, then aligns the tail ends of the plurality of steel pipes, and after cutting, the clamping assemblies move to continue moving the steel pipes towards the direction of the cutter. Then, the clamp beside the cutter clamps the steel pipe group, and the clamping assemblies are loosened and moved to one side to clamp the steel pipe group at a suitable position, which is convenient for subsequent conveying of the steel pipe group. However, the above-mentioned conveying and limiting mechanism of the steel pipe processing production line still has the following problems: When aligning the ends of the steel pipes, the steel pipe group needs to be pushed by a baffle so that the ends of the plurality of steel pipes are flush with the surface of the baffle. This method is relatively laborious, and the ends are not flush due to the length error between the steel pipes, so a cut needs to be made first, which affects the work efficiency. When the steel pipes are long, only one group of clamping assemblies clamps during the conveying of the steel pipes, and the probability of misalignment of the steel pipes is relatively high during movement. SUMMARY

[0003] The present application aims to provide a conveying and limiting mechanism of a steel pipe processing production line to solve the problems of the prior art, i.e., when aligning the ends of the steel pipes, the steel pipe group needs to be pushed by a baffle so that the ends of the plurality of steel pipes are flush with the surface of the baffle. This method is relatively laborious, and the ends are not flush due to the length error between the steel pipes, so a cut needs to be made first, which affects the work efficiency. When the steel pipes are long, only one group of clamping assemblies clamps during the conveying of the steel pipes, and the probability of misalignment of the steel pipes is relatively high during movement.

[0004] In order to achieve the above object, the present application provides the following technical scheme: a conveying and limiting mechanism of a steel pipe processing production line, comprising a base support, one end of the base support is provided with a limiting and cutting assembly, one side of the inside of the base support is provided with a lifting driving mechanism, both sides of one end of the base support are fixedly connected with rotating shaft seats, a steel pipe supporting plate is rotatably connected between the two rotating shaft seats, one side of the surface of the steel pipe supporting plate is provided with a threaded conveying assembly, the other side of the surface of the steel pipe supporting plate is provided with an auxiliary conveying assembly, one end of the surface of the steel pipe supporting plate is provided with a pipe end positioning mechanism, one side of the bottom of the steel pipe supporting plate is fixedly connected with a second connecting seat.

[0005] Preferably, the limiting and cutting assembly comprises a cutter, the cutter is arranged on the base support, and one side of the connecting position of the cutter and the base support is provided with a cutting clamp, which is conducive to cutting and dividing the steel pipe.

[0006] Preferably, the lifting driving mechanism comprises a supporting rod, the supporting rod is arranged on the base support, a lifting lead screw is arranged between the supporting rod and the base support, the other end of the base support is fixedly installed with a lifting motor, the output end of the lifting motor is fixedly connected with one end of the lifting lead screw, and both sides of the inner wall of the base support are provided with guide sliding grooves, which is conducive to making one end of the whole steel pipe supporting plate rotate and lift up.

[0007] Preferably, the surface of the lifting lead screw is threadedly connected with a lifting threaded block, both sides of the lifting threaded block are fixedly connected with guide sliding plates, the surface of the guide sliding plates is slidably connected with the inside of the guide sliding grooves, the top of the lifting threaded block is fixedly connected with a first connecting seat, and a linkage rod is arranged between the first connecting seat and the second connecting seat.

[0008] Preferably, one end of the steel pipe supporting plate is fixedly connected with a rotating shaft rod, the rotating shaft rod is rotatably connected between the two rotating shaft seats, a plurality of vibrators are arranged on the side of the bottom of the steel pipe supporting plate, and one end of the bottom of the steel pipe supporting plate is fixedly connected with two supporting pads.

[0009] Preferably, the threaded conveying assembly comprises a screw groove, a conveying screw is rotatably connected in the inside of the screw groove, a conveying motor is arranged in the middle of one end of the steel pipe supporting plate, and the output end of the conveying motor is fixedly connected with one end of the conveying screw, which is conducive to clamping the steel pipe group and conveying.

[0010] Preferably, the surface of the conveying screw is threadedly connected with conveying thread blocks, the surface of the conveying thread blocks is slidably connected with the inner wall of the screw groove, the top of the conveying thread blocks is fixedly connected with support frames, the two sides of the support frames are provided with first installation grooves and second installation grooves, the interiors of the two first installation grooves and the two second installation grooves are fixedly installed with small hydraulic cylinders, the output ends of the two small hydraulic cylinders are fixedly connected with limiting clamping plates, and the output ends of the other two small hydraulic cylinders are provided with top clamping plates.

[0011] Preferably, the auxiliary conveying assembly comprises a transmission groove and a moving sliding block, the interior of the transmission groove is fixedly installed with a moving hydraulic cylinder, the moving sliding block is slidably connected in the interior of the transmission groove, the output end of the moving hydraulic cylinder is fixedly connected with one side of the moving sliding block, and the top of the moving sliding block is fixedly connected with a moving clamping device.

[0012] Preferably, the pipe end positioning mechanism comprises two side supporting rods and a positioning baffle, the two side supporting rods are fixedly connected on the steel pipe supporting plate, the side of the two side supporting rods is provided with positioning grooves, one of the positioning grooves is rotatably connected with a positioning lead screw, the top of one of the side supporting rods is fixedly installed with a positioning motor, the output end of the positioning motor is fixedly connected with one end of the positioning lead screw, and the other positioning groove is fixedly connected with a positioning round rod, which is beneficial to the completion of end alignment positioning, is convenient and fast, and then direct length cutting can be performed, so that the pipe end is not required to be cut first for alignment, and the machining efficiency is improved.

[0013] Preferably, the two ends of the positioning baffle are fixedly connected with a positioning thread block and a positioning hole block respectively, one side of the positioning baffle is fixedly connected with a top baffle, the positioning thread block is threadedly connected on the positioning lead screw, and the interior of the positioning hole block is slidably connected with the surface of the positioning round rod.

[0014] Compared with the prior art, the beneficial effects of the present application are that the steel pipe supporting plate can rotate around the rotating shaft rod, and two clamping assemblies are arranged on the steel pipe supporting plate, so that when the length of the steel pipe group is relatively long, the conveying process is more stable because two clamping assemblies clamp during conveying, and the degree and probability of misalignment between the steel pipes during conveying are greatly reduced. The end of the steel pipe supporting plate can be lifted by the lifting driving mechanism, a plurality of steel pipes are placed between the two clamping assemblies installed on the steel pipe supporting plate, then the end of the steel pipe supporting plate corresponding to the tail end of the steel pipe is lifted, and the plurality of inclined steel pipes are in contact with the surface of the positioning baffle under the action of gravity and the vibrator, so that the end alignment positioning is completed, which is convenient and fast, and then direct length cutting can be performed, so that the pipe end is not required to be cut first for alignment, and the machining efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The overall structural diagram of the conveying limiting mechanism of the present application; Figure 2 The structure display diagram of the end positioning of the conveying limiting mechanism of the present application; Figure 3 The bottom structural diagram of the conveying limiting mechanism of the present application; Figure 4 The structural diagram of the positioning conveying mechanism of the conveying limiting mechanism of the present application; Figure 5 The structural diagram of the baffle mechanism of the conveying limiting mechanism of the present application; Figure 6 The structural diagram of the threaded conveying assembly of the conveying limiting mechanism of the present application; Figure 7 The structural diagram of the baffle assembly of the conveying limiting mechanism of the present application; Figure 8 The structural diagram of the steel pipe support plate of the conveying limiting mechanism of the present application.

[0016] In the figure: 1, base support; 2, support rod; 3, cutter; 4, cutting clamp; 5, rotating shaft seat; 6, guide sliding groove; 7, lifting screw rod; 8, lifting motor; 9, lifting threaded block; 10, guide sliding plate; 11, first connecting seat; 12, steel pipe support plate; 13, rotating shaft rod; 14, second connecting seat; 15, linkage rod; 16, vibrator; 17, screw groove; 18, conveying screw; 19, conveying motor; 20, conveying threaded block; 21, support frame; 22, first installation groove; 23, second installation groove; 24, small hydraulic cylinder; 25, limiting clamp plate; 26, top clamp plate; 27, transmission groove; 28, moving hydraulic cylinder; 29, moving sliding block; 30, moving clamp; 31, side support rod; 32, positioning groove; 33, positioning screw rod; 34, positioning round rod; 35, positioning motor; 36, positioning baffle; 37, positioning threaded block; 38, positioning hole block; 39, top baffle; 40, support cushion block. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application.

[0018] Please refer to Figures 1-8The application provides a conveying and limiting mechanism of a steel pipe processing production line, which comprises a base support 1, a limiting and cutting assembly is arranged at one end of the base support 1, a lifting driving mechanism is arranged at one side in the base support 1, rotating shaft seats 5 are fixedly connected to the two sides of one end of the base support 1, a steel pipe supporting plate 12 is rotationally connected between the two rotating shaft seats 5, a threaded conveying assembly is arranged at one side of the surface of the steel pipe supporting plate 12, an auxiliary conveying assembly is arranged at the other side of the surface of the steel pipe supporting plate 12, a pipe end positioning mechanism is arranged at one end of the surface of the steel pipe supporting plate 12, a second connecting seat 14 is fixedly connected to one side of the bottom of the steel pipe supporting plate 12, the limiting and cutting assembly comprises a cutter 3, the cutter 3 is arranged on the base support 1, and a cutting clamp 4 is arranged at one side of the connecting position of the cutter 3 and the base support 1.

[0019] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , further, the lifting driving mechanism comprises a supporting rod 2, the supporting rod 2 is arranged on the base support 1, a lifting lead screw 7 is arranged between the supporting rod 2 and the base support 1, a lifting motor 8 is fixedly installed at the other end of the base support 1, the output end of the lifting motor 8 is fixedly connected with one end of the lifting lead screw 7, guide sliding grooves 6 are formed in the two sides of the inner wall of the base support 1, a lifting threaded block 9 is threadedly connected with the surface of the lifting lead screw 7, guide sliding plates 10 are fixedly connected to the two sides of the lifting threaded block 9, the surface of the guide sliding plates 10 is slidably connected with the inside of the guide sliding grooves 6, a first connecting seat 11 is fixedly connected to the top of the lifting threaded block 9, a linkage rod 15 is arranged between the first connecting seat 11 and the second connecting seat 14, a rotating shaft rod 13 is fixedly connected to one end of the steel pipe supporting plate 12, the rotating shaft rod 13 is rotationally connected between the two rotating shaft seats 5, a plurality of vibrators 16 are arranged at the edge of the bottom of the steel pipe supporting plate 12, two supporting pads 40 are fixedly connected to one end of the bottom of the steel pipe supporting plate 12, the pipe end positioning mechanism comprises two side supporting rods 31 and a positioning baffle 36, the two side supporting rods 31 are fixedly connected to the steel pipe supporting plate 12, a positioning groove 32 is formed in one side of each of the two side supporting rods 31, a positioning lead screw 33 is rotationally connected in the inside of one of the positioning grooves 32, a positioning motor 35 is fixedly installed at the top of one of the side supporting rods 31, the output end of the positioning motor 35 is fixedly connected with one end of the positioning lead screw 33, a positioning circular rod 34 is fixedly connected in the other positioning groove 32, a positioning threaded block 37 and a positioning hole block 38 are fixedly connected to the two ends of the positioning baffle 36, a top baffle 39 is fixedly connected to one side of the positioning baffle 36, the positioning threaded block 37 is threadedly connected on the positioning lead screw 33, the inside of the positioning hole block 38 is slidably connected with the surface of the positioning circular rod 34; When in use, the steel pipe group that needs to be cut to a fixed length is placed on the moving clamp 30 and the support frame 21, the moving clamp 30 and the cutting clamp 4 are the same as the clamping structure part on the threaded conveying assembly, which can well limit the steel pipe. First, adjust the limiting clamping plates 25 on both sides, which have a suitable gap between them. After multiple steel pipes are placed, there is a certain gap, and each layer is similar to the placement. Place the appropriate number of layers. At this time, start the lifting motor 8 to drive the lifting lead screw 7 to rotate. Under the action of the linkage rod 15, the steel pipe support plate 12 rotates around the rotating shaft seat 5 and the rotating shaft rod 13 as the axis. One end of the steel pipe support plate 12 is raised by about 30°. Before that, the positioning baffle 36 is lowered to contact the surface of the steel pipe support plate 12. The end of the steel pipe downward under the action of gravity will move and contact the positioning baffle 36. Because there is a certain friction between the steel pipes, start the vibrator 16 to help the steel pipe better contact the positioning baffle 36. In turn, the end of the steel pipe to be cut is aligned by the positioning baffle 36, and can be directly cut.

[0020] Referring to Figure 6 , Figure 7 and Figure 8 , further, the threaded conveying assembly comprises a screw groove 17, a conveying screw 18 is rotatably connected inside the screw groove 17, a conveying motor 19 is arranged at the middle of one end of the steel pipe support plate 12, the output end of the conveying motor 19 is fixedly connected with one end of the conveying screw 18, a conveying threaded block 20 is threadedly connected with the surface of the conveying screw 18, the surface of the conveying threaded block 20 is slidably connected with the inner wall of the screw groove 17, the top of the conveying threaded block 20 is fixedly connected with a support frame 21, the two sides of the support frame 21 are provided with a first installation groove 22 and a second installation groove 23, two first installation grooves 22 and two second installation grooves 23 are fixedly installed with small hydraulic cylinders 24, the output ends of the two small hydraulic cylinders 24 are fixedly connected with limiting clamping plates 25, the output ends of the other two small hydraulic cylinders 24 are provided with a top clamping plate 26, an auxiliary conveying assembly comprises a transmission groove 27 and a moving sliding block 29, the moving hydraulic cylinder 28 is fixedly installed inside the transmission groove 27, the moving sliding block 29 is slidably connected inside the transmission groove 27, the output end of the moving hydraulic cylinder 28 is fixedly connected with one side of the moving sliding block 29, and the top of the moving sliding block 29 is fixedly connected with a moving clamp 30; When in use, the small hydraulic cylinders 24 on both sides and the top are started to drive the limiting clamping plates 25 and the top clamping plate 26 to move, so as to clamp and hold the steel pipe group. The length of the top clamping plate 26 is adapted to the clamping of the steel pipe group, and does not interfere with the limiting clamping plates 25 on both sides. At this time, the positioning motor 35 is started to drive the positioning screw rod 33 to rotate, so that the positioning threaded block 37 moves upwards to drive the positioning baffle 36 to move, so as to prevent interference with the steel pipe length cutting. At this time, the steel pipe group is clamped and held at two position points. At this time, the transmission motor 19 is started to drive the transmission screw rod 18 to rotate, so that the transmission threaded block 20 moves with the support frame 21. Therefore, the steel pipe group moves towards the direction of the cutter 3. At the same time, the moving hydraulic cylinder 28 is retracted at the same speed as the transmission threaded block 20, and the moving clamp 30 moves at the same speed as the support frame 21, so as to ensure the stability of the steel pipe transmission. Servo motor encoders are installed on the transmission mechanism to feed back the screw rod displacement in real time, and magnetostrictive displacement sensors are installed on the moving hydraulic cylinder 28 to feed back the piston position in real time. The precision can reach 0.01 mm. PLC is used as a synchronous core controller. If it is detected that the position of the moving clamp 30 lags behind the support frame 21, the controller will increase the flow of the hydraulic pump of the moving hydraulic cylinder 28. If the moving clamp 30 exceeds the support frame 21, the flow will be reduced. Conversely, the same principle applies. The steel pipe group is moved to the position of the cutting clamp 4. The cutting clamp 4 clamps the steel pipe group. Then the moving clamp 30 is released, and the moving hydraulic cylinder 28 is reset. During this period, there are also two clamping points, which can reduce the movement displacement of the steel pipe group. After resetting, the moving clamp 30 is clamped again to prepare for the next movement.

[0021] In use, the embodiment of the application: according to the space distance inside the holder, the diameter of the steel pipe, to determine the number of layers of steel pipe, how many steel pipes in each layer, use the appropriate length of the top clamping plate 26, adjust the distance between the two limiting clamping plates 25, slightly larger than the width of the multiple steel pipes, the top clamping plate 26 moves to a similar position, which is conducive to subsequent clamping, at this time the lifting mechanism makes one end of the steel pipe support plate 12 rise, and the positioning baffle 36, gravity and the vibrator 16 make the multiple steel pipes move and align, the remaining gap is to facilitate the movement and alignment of the steel pipes. After alignment, move the holder 30 and the clamping mechanism on the conveying mechanism to clamp the steel pipe group, then start the lifting mechanism again to reset, so that the steel pipe support plate 12 is in a horizontal state, then start the conveying motor 19 and the moving hydraulic cylinder 28 to move the steel pipe for fixed length cutting. At the beginning of the steel pipe, the steel pipe is long and needs multiple point limiting, which is conducive to reducing the misplacement during the movement and transmission of the steel pipe. In the subsequent process, when the length of the steel pipe is shorter, the limiting mechanism on the conveying mechanism no longer clamps, but only clamps through the moving holder 30. Then, the steel pipe group is sent to the position of the cutter 3 for cutting by the moving hydraulic cylinder 28. The device itself has a control panel that can control the related mechanisms, and the inside is also provided with a controller for auxiliary control. It should be noted that the present application is a conveying and limiting mechanism for a steel pipe processing production line, and all parts are general standard parts or parts known to those skilled in the art. Its structure and principle can be known by those skilled in the art through technical manuals or through conventional experimental methods. In the idle place of the device, all the above-mentioned electrical devices, power elements, electrical devices and suitable monitoring computers and power supplies are connected through wires. The specific connection means should refer to the working order of the above-mentioned working principle to complete the electrical connection. The detailed connection means is a known technology in the art.

[0022] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacements to some of the technical features, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A conveying and limiting mechanism for a steel pipe processing production line, comprising a base support (1), characterized in that: One end of the base bracket (1) is provided with a limit cutting component. One side of the interior of the base bracket (1) is provided with a lifting drive mechanism. Both sides of one end of the base bracket (1) are fixedly connected with rotating shaft seats (5). A steel pipe support plate (12) is rotatably connected between the two rotating shaft seats (5). One side of the surface of the steel pipe support plate (12) is provided with a threaded transmission component. The other side of the surface of the steel pipe support plate (12) is provided with an auxiliary transmission component. One end of the surface of the steel pipe support plate (12) is provided with a pipe end positioning mechanism. One side of the bottom of the steel pipe support plate (12) is fixedly connected with a second connecting seat (14).

2. The conveying and limiting mechanism of a steel pipe processing production line according to claim 1, characterized in that: The limiting cutting assembly includes a cutter (3), which is mounted on a base bracket (1). A cutting clamp (4) is provided on one side of the connection between the cutter (3) and the base bracket (1).

3. The conveying and limiting mechanism of a steel pipe processing production line according to claim 1, characterized in that: The lifting drive mechanism includes a support rod (2), which is mounted on a base bracket (1). A lifting screw (7) is provided between the support rod (2) and the base bracket (1). A lifting motor (8) is fixedly installed at the other end of the base bracket (1). The output end of the lifting motor (8) is fixedly connected to one end of the lifting screw (7). Guide grooves (6) are provided on both sides of the inner wall of the base bracket (1).

4. The conveying and limiting mechanism of a steel pipe processing production line according to claim 3, characterized in that: The lifting screw (7) is threadedly connected to a lifting threaded block (9). Guide slide plates (10) are fixedly connected to both sides of the lifting threaded block (9). The surface of the guide slide plate (10) is slidably connected to the inside of the guide slide groove (6). A first connecting seat (11) is fixedly connected to the top of the lifting threaded block (9). A linkage rod (15) is provided between the first connecting seat (11) and the second connecting seat (14).

5. The conveying and limiting mechanism of a steel pipe processing production line according to claim 1, characterized in that: One end of the steel pipe support plate (12) is fixedly connected to a rotating shaft (13), which is rotatably connected between two rotating shaft seats (5). Multiple vibrators (16) are provided on the side of the bottom of the steel pipe support plate (12), and two support pads (40) are fixedly connected to one end of the bottom of the steel pipe support plate (12).

6. The conveying and limiting mechanism of a steel pipe processing production line according to claim 1, characterized in that: The threaded transmission assembly includes a screw groove (17), and a transmission screw (18) is rotatably connected inside the screw groove (17). A transmission motor (19) is provided in the middle of one end of the steel pipe support plate (12), and the output end of the transmission motor (19) is fixedly connected to one end of the transmission screw (18).

7. The conveying and limiting mechanism of a steel pipe processing production line according to claim 6, characterized in that: The surface of the conveying screw (18) is threadedly connected to a conveying thread block (20). The surface of the conveying thread block (20) is slidably connected to the inner wall of the screw groove (17). A support frame (21) is fixedly connected to the top of the conveying thread block (20). A first mounting groove (22) and a second mounting groove (23) are provided on both sides of the support frame (21). Small hydraulic cylinders (24) are fixedly installed inside the two first mounting grooves (22) and the two second mounting grooves (23). The output ends of the two small hydraulic cylinders (24) are fixedly connected to limit clamps (25). A top clamp (26) is provided between the output ends of the other two small hydraulic cylinders (24).

8. The conveying and limiting mechanism of a steel pipe processing production line according to claim 1, characterized in that: The auxiliary transmission assembly includes a transmission groove (27) and a movable slider (29). A movable hydraulic cylinder (28) is fixedly installed inside the transmission groove (27). The movable slider (29) is slidably connected inside the transmission groove (27). The output end of the movable hydraulic cylinder (28) is fixedly connected to one side of the movable slider (29). A movable clamp (30) is fixedly connected to the top of the movable slider (29).

9. The conveying and limiting mechanism of a steel pipe processing production line according to claim 1, characterized in that: The pipe end positioning mechanism includes two side support rods (31) and a positioning baffle (36). The two side support rods (31) are fixedly connected to the steel pipe support plate (12). A positioning groove (32) is provided on one side of each of the two side support rods (31). A positioning screw (33) is rotatably connected inside one of the positioning grooves (32). A positioning motor (35) is fixedly installed on the top of one of the side support rods (31). The output end of the positioning motor (35) is fixedly connected to one end of the positioning screw (33). A positioning round rod (34) is fixedly connected inside the other positioning groove (32).

10. The conveying and limiting mechanism of a steel pipe processing production line according to claim 9, characterized in that: The positioning baffle (36) is fixedly connected to a positioning threaded block (37) and a positioning hole block (38) at both ends, and a top baffle (39) is fixedly connected to one side of the positioning baffle (36). The positioning threaded block (37) is threadedly connected to the positioning screw (33), and the interior of the positioning hole block (38) is slidably connected to the surface of the positioning round rod (34).

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