Cone yarn steaming treatment device

Abstract

The utility model relates to the technical field of textile dyeing, in particular to a cone yarn steaming processing device, which comprises a steaming mechanism, a yarn feeding mechanism, a yarn discharging mechanism, a yarn feeding mechanism and a yarn discharging mechanism, the plurality of cylinders are fixed in the cart at equal intervals; the bobbin placing mechanism is fixed in the steam kettle, and can be used for placing the bobbin yarns at equal intervals, and the bobbin yarns can be conveniently replaced; and the distance adjusting mechanism is fixed at the top of the steam kettle and can separate the cone yarns which are tightly attached together and ensure the distance. According to the utility model, the cylinder of the cart is aligned to one end of the arc-shaped rod, so that a worker can push all cone yarns in the cylinder to the arc-shaped rod by using the push rod to complete installation, the worker does not need to place the cone yarns one by one, and the cone yarns can be placed only by using the push rod to push the cone yarns, so that the working efficiency is effectively improved, the downtime is greatly reduced, and meanwhile, the labor intensity is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to textile dyeing technical field, concretely is a hank steaming treatment device. BACKGROUND

[0002] In the field of textile dyeing processing, especially in the dyeing treatment process of cotton hank, hank steaming treatment is a very key link. The traditional hank steaming treatment device has some problems in practical application.

[0003] In the traditional hank steaming treatment process, after the steaming of a batch of hank is completed, the steamed hank is manually taken out from the equipment one by one, and then new hank to be steamed is replaced. This process not only consumes time and effort, greatly increases the labor intensity, and the long-time shutdown prolongs the whole production cycle, greatly reduces the production efficiency, and cannot meet the demand of large-scale and efficient production of modern textile industry. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a hank steaming treatment device to solve the problems in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A hank steaming treatment device comprises:

[0007] A steaming mechanism comprises a steam boiler and a cart, and the steam boiler is fixedly connected with an electric rotary door at one end;

[0008] Further comprising:

[0009] A plurality of cylinders are fixedly arranged at equal intervals in the interior of the cart;

[0010] A hank placing mechanism is fixedly arranged in the interior of the steam boiler, can place hank at equal intervals, and facilitates the replacement of hank;

[0011] A spacing adjusting mechanism is fixedly arranged at the top of the steam boiler, can separate hank closely arranged together, and ensure the spacing.

[0012] Further, the hank placing mechanism comprises:

[0013] A sliding table is slidingly inserted into the interior of the steam boiler, and the bottom walls on both sides of the sliding table are fixedly connected with toothed plates, rotating seats are fixedly connected with both sides of one end of the sliding table, and the rotating seats are rotatably connected with hubs;

[0014] A first motor is fixed with the outer wall on one side of the steam boiler, and a first motor shaft is fixedly connected with a first round rod;

[0015] Straight gears are provided with two, respectively fixed in the round rod one both ends, and with the gear board meshing transmission.

[0016] Preferably, the bobbin placing mechanism comprises:

[0017] Square rods one are provided with a plurality of and fixed on the outer wall of the slide table side at equal intervals, and the outer wall of the square rod one is fixedly connected with a plurality of arc-shaped rods at equal intervals.

[0018] Preferably, the bobbin placing mechanism comprises:

[0019] The round rod two is fixed on the top of the square rod one.

[0020] The T-shaped plate is slid between the outer wall of the round rod two and the outer wall of the slide table, and the outer wall of the T-shaped plate is provided with an arc-shaped hole at the arc-shaped rod, so that the personnel can conveniently take down the bobbin.

[0021] Preferably, the spacing adjusting mechanism comprises:

[0022] The second motor is fixed on the top wall of the steam pot, and the rotating shaft of the second motor is fixedly connected with a threaded rod.

[0023] The U-shaped frame is fixed on the top wall of the steam pot and rotationally connected with one end of the threaded rod.

[0024] The square plate is screwed on the outer wall of the threaded rod.

[0025] Preferably, the spacing adjusting mechanism comprises:

[0026] The square rod two is provided with a plurality of groups and fixed at equal intervals on one side of the square plate.

[0027] The square rod three is provided with a plurality of groups and fixed at equal intervals on the outer wall of the square plate at one side of the square rod two, and the length of the square rod three is shorter than that of the square rod two.

[0028] The square rod four is provided with a plurality of groups and fixed at equal intervals on the outer wall of the square plate at one side of the square rod three, and the length of the square rod four is shorter than that of the square rod three.

[0029] The square rod five is provided with a plurality of groups and fixed at equal intervals on the outer wall of the square plate at one side of the square rod four, and the length of the square rod five is shorter than that of the square rod four.

[0030] Preferably, the spacing adjusting mechanism comprises:

[0031] The inclined blocks are provided with a plurality of and respectively fixed on the outer wall of one end of the square rod two, the square rod three, the square rod four and the square rod five, and the outer wall of the inclined block is provided with a fillet.

[0032] Compared with the prior art, the utility model has the beneficial effects that:

[0033] 1. By aligning the cylinder of the cart with one end of the arc-shaped rod, the person can use the push rod to push all the bobbins in the cylinder onto the arc-shaped rod, completing the installation without the person having to place each one individually, effectively improving work efficiency and greatly reducing downtime, while also reducing labor intensity.

[0034] 2. By driving the spacing adjustment mechanism, the bobbins that are side by side and in close contact can be quickly separated without human intervention, and multiple arcs are provided on the arc-shaped rod, so that the separated bobbins will slide along the trajectory of the arc-shaped rod to the designated position, ensuring a certain spacing between the bobbins, allowing steam to flow more smoothly between the bobbins, evenly surrounding each bobbin from all directions, and fully penetrating into every corner inside the bobbins, allowing the yarn fibers to uniformly absorb the moisture and heat in the steam, thereby ensuring the consistency of the steaming effect, and uniform steaming can ensure that the dye fixing effect of the dye on the yarn is uniform, avoiding problems such as color variation and uneven dyeing, and improving product quality and pass rate.

[0035] 3. By pushing the T-shaped plate, the T-shaped plate slides along the round rod II, the bobbins steamed on the arc-shaped rod can be quickly pushed out and into the corresponding cylinder for placement, effectively improving the disassembly efficiency of the bobbins, reducing labor intensity, and reducing downtime. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a schematic diagram of the overall structure of the present application;

[0037] Figure 2 is a schematic diagram of the cart structure in the present application;

[0038] Figure 3 is a schematic diagram of the bobbin placement mechanism structure in the present application;

[0039] Figure 4 is a schematic diagram of the internal structure of the steam pot in the present application;

[0040] Figure 5 is a schematic diagram of the local structure of the bobbin placement mechanism in the present application;

[0041] Figure 6 is a schematic diagram of the local structure of the spacing adjustment mechanism in the present application.

[0042] In the figure: 100, steaming mechanism; 110, steam boiler; 120, trolley; 121, cylinder; 130, electric rotary door; 200, bobbin placing mechanism; 210, sliding table; 211, toothed plate; 212, rotating seat; 213, wheel hub; 220, No. 1 motor; 221, round rod 1; 222, spur gear; 230, square rod 1; 231, round rod 2; 232, arc-shaped rod; 233, T-shaped plate; 234, arc-shaped hole; 300, spacing adjusting mechanism; 310, No. 2 motor; 311, threaded rod; 312, U-shaped frame; 320, square plate; 321, square rod 2; 322, inclined block; 323, square rod 3; 324, square rod 4; 325, square rod 5. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0044] Please refer to Figures 1-6 In the embodiments of the present application, a bobbin steaming treatment device comprises a steaming mechanism 100, the steaming mechanism 100 comprises a steam boiler 110, a trolley 120 and the following parts: an electric rotary door 130 is fixedly connected at one end of the steam boiler 110, the cylinder 121 thereof is provided with a plurality of cylinders 121, is fixedly arranged in the trolley 120 at equal intervals, a bobbin placing mechanism 200 is fixedly arranged in the steam boiler 110, can place bobbin at equal intervals, and is convenient for replacing the bobbin, a spacing adjusting mechanism 300 is fixedly arranged at the top of the steam boiler 110, can separate the bobbin close to each other and ensure the spacing, the cylinder 121 thereof is provided with a plurality of cylinders 121, is fixedly arranged in the trolley 120 at equal intervals, the bobbin placing mechanism 200 comprises the following parts: a sliding table 210 is slidingly inserted into the steam boiler 110, toothed plates 211 are fixedly connected to the bottom walls on both sides of the sliding table 210, rotating seats 212 are fixedly connected to both sides of one end of the sliding table 210, wheel hubs 213 are rotatably connected to the rotating seats 212, a No. 1 motor 220 is fixed to one side of the outer wall of the steam boiler 110, a round rod 1 221 is fixedly connected to the rotating shaft of the No. 1 motor 220, spur gears 222 are provided with two spur gears 222, are fixedly arranged at both ends of the round rod 1 221, are in meshing transmission with the toothed plates 211, square rods 1 230 are provided with a plurality of square rods 1 230, are fixedly arranged on the outer wall of one side of the sliding table 210 at equal intervals, a plurality of arc-shaped rods 232 are fixedly connected to the outer wall of the square rods 1 230 at equal intervals, the cylinder 121 of the trolley 120 is aligned with one end of the arc-shaped rod 232, the personnel can push the bobbin in the cylinder 121 to the arc-shaped rod 232 by using a push rod, installation is completed, and personnel do not need to place the bobbin one by one.

[0045] The pitch adjusting mechanism 300 comprises the following parts: the second motor 310 is fixed on the top wall of the steam pot 110, a threaded rod 311 is fixedly connected to the rotating shaft of the second motor 310, a U-shaped frame 312 is fixed on the top wall of the steam pot 110 and rotationally connected to one end of the threaded rod 311, a square plate 320 is screwed on the outer wall of the threaded rod 311, a plurality of groups of square rods two 321 are fixed at equal intervals on one side of the square plate 320, a plurality of groups of square rods three 323 are fixed at equal intervals on the outer wall of the square plate 320 on the side of the square rods two 321, the length of the square rods three 323 is shorter than that of the square rods two 321, a plurality of groups of square rods four 324 are fixed at equal intervals on the outer wall of the square plate 320 on the side of the square rods three 323, the length of the square rods four 324 is shorter than that of the square rods three 323, a plurality of groups of square rods five 325 are fixed at equal intervals on the outer wall of the square plate 320 on the side of the square rods four 324, the length of the square rods five 325 is shorter than that of the square rods four 324, and a plurality of inclined blocks 322 are fixed on the outer walls of one end of the square rods two 321, the square rods three 323, the square rods four 324 and the square rods five 325, respectively. A round corner is formed on the outer wall of the inclined block 322. The pitch adjusting mechanism 300 can quickly separate the parallel and closely arranged cheese under the condition of unmanned driving. A plurality of radii are arranged on the arc-shaped rod 232, and the separated cheese will slide along the track of the arc-shaped rod 232 to the designated position, so as to ensure a certain distance between the cheese.

[0046] The second round rod 231 is fixed on the top of the first square rod 230, and the T-shaped plate 233 slides between the outer wall of the second round rod 231 and the outer wall of the sliding table 210. An arc-shaped hole 234 is formed on the outer wall of the arc-shaped rod 232, which can facilitate personnel to take down the cheese. By pushing the T-shaped plate 233, the T-shaped plate 233 slides along the second round rod 231, which can quickly push the steamed cheese on the arc-shaped rod 232 out and into the corresponding cylinder 121 for placement.

[0047] Specifically, in operation, the electric rotary door 130 drives to open one end of the steam pot 110, the first motor 220 drives to rotate the straight gear 222 to engage with the gear plate 211, drives the sliding table 210 to slide out of the steam pot 110, and drives the bobbin placing mechanism 200 to push out of the steam pot 110. A person pushes the cart 120 to be close to one end of the arc-shaped rod 232, and aligns the center of the cylinder 121 with one end of the arc-shaped rod 232. The person uses the push rod to push from one end of the cylinder 121, and pushes the bobbin in the cylinder 121 outwards. The paper tube of the bobbin is inserted into the arc-shaped rod 232. The person continues to push until all the bobbin in the cylinder 121 is located on the arc-shaped rod 232. Through repeated work, all the bobbin is placed on the bobbin placing mechanism 200. The first motor 220 drives the straight gear 222 to engage with the gear plate 211 in reverse, drives the sliding table 210 to return to the steam pot 110, and the electric rotary door 130 drives to close one end of the steam pot 110. The second motor 310 drives the threaded rod 311 to rotate and engage with the square plate 320, drives the plurality of group inclined blocks 322 to move downwards, each inclined block 322 corresponds to the protrusion of the arc-shaped rod 232, and the inclined blocks 322 on one side of the square plate 320 first contact the bobbin. The inclined blocks 322 extrude the bobbin from the middle, separate the two bobbin close to each other, and move along the arc of the arc-shaped rod 232 to the designated position. The other rows of inclined blocks 322 are extruded in sequence to separate the remaining bobbin close to each other and move to the designated position to ensure the spacing between the bobbin. After completion, the inclined blocks 322 return to the upper part of the steam pot 110. The steam pot 110 drives to steam the bobbin. When the steaming is completed, the electric rotary door 130 drives to open one end of the steam pot 110, the first motor 220 drives the straight gear 222 to rotate and engage with the gear plate 211, drives the sliding table 210 to slide out of the steam pot 110, and drives the bobbin placing mechanism 200 to push out of the steam pot 110. A person pushes the cart 120 without bobbin to one side of the bobbin placing mechanism 200, and aligns the cylinder 121 with one end of the arc-shaped rod 232. The person pushes the T-shaped plate 233, and the T-shaped plate 233 slides with the round rod two 231 and the sliding table 210 to push all the bobbin placed on the arc-shaped rod 232 into the corresponding cylinder 121, and completes the replacement.

[0048] Embodiment one

[0049] As Figure 2 , Figure 3 and Figure 5As shown, in this embodiment, the cylinder 121 is provided with several, fixed at equal intervals inside the trolley 120, the bobbin placing mechanism 200 comprises the following parts: its sliding table 210, slidingly inserted inside the steam pot 110, the toothed plate 211 is fixedly connected on both sides of the bottom wall of the sliding table 210, and the rotating seat 212 is fixedly connected on both sides of one end of the sliding table 210, and the wheel hub 213 is rotatably connected with the rotating seat 212, the No. 1 motor 220 is fixed with the outer wall of one side of the steam pot 110, the round rod one 221 is fixedly connected on the rotating shaft of the No. 1 motor 220, the spur gear 222 is provided with two, fixed on both ends of the round rod one 221, and engaged with the toothed plate 211, and the square rod one 230 is provided with several, fixed on the outer wall of one side of the sliding table 210 at equal intervals, and the arc-shaped rod 232 is fixedly connected on the outer wall of the square rod one 230 at equal intervals.

[0050] In this embodiment, the electric rotating door 130 drives the steam pot 110 to open one end, the No. 1 motor 220 drives the spur gear 222 to rotate and engage with the toothed plate 211, drives the sliding table 210 to slide outwards of the steam pot 110, the bobbin placing mechanism 200 is pushed outwards of the steam pot 110, the personnel pushes the trolley 120 close to one end of the arc-shaped rod 232, and the center of the cylinder 121 is aligned with the arc-shaped rod 232, the personnel uses the push rod to push from one end of the cylinder 121, and the bobbin inside the cylinder 121 is pushed outwards, the paper tube of the bobbin is inserted with the arc-shaped rod 232, and the bobbin is continuously pushed to be located on the arc-shaped rod 232, and through repeated work, the bobbin is placed on the bobbin placing mechanism 200, by aligning the cylinder 121 of the trolley 120 with one end of the arc-shaped rod 232, the personnel uses the push rod to push the bobbin inside the cylinder 121 to the arc-shaped rod 232, and the installation is completed, without the personnel placing one by one, the work efficiency is effectively improved, the downtime is greatly reduced, and the labor intensity is reduced.

[0051] As Figure 4 and Figure 6As shown, in this embodiment, the spacing adjustment mechanism 300 comprises the following parts: the second motor 310 is fixed to the top wall of the steam pot 110, a threaded rod 311 is fixedly connected to the rotating shaft of the second motor 310, a U-shaped frame 312 is fixed to the top wall of the steam pot 110 and rotationally connected to one end of the threaded rod 311, a square plate 320 is screwed onto the outer wall of the threaded rod 311, a plurality of groups of square rods two 321 are fixed at equal intervals on one side of the square plate 320, a plurality of groups of square rods three 323 are fixed at equal intervals on the outer wall of the square plate 320 on the side of the square rods two 321, the length of the square rods three 323 is shorter than that of the square rods two 321, a plurality of groups of square rods four 324 are fixed at equal intervals on the outer wall of the square plate 320 on the side of the square rods three 323, the length of the square rods four 324 is shorter than that of the square rods three 323, a plurality of groups of square rods five 325 are fixed at equal intervals on the outer wall of the square plate 320 on the side of the square rods four 324, the length of the square rods five 325 is shorter than that of the square rods four 324, and a plurality of inclined blocks 322 are fixed to the outer wall of one end of the square rods two 321, the square rods three 323, the square rods four 324 and the square rods five 325, respectively, and a round corner is formed on the outer wall of the inclined block 322.

[0052] In specific implementation, the first motor 220 drives the straight gear 222 to mesh with the toothed plate 211 in reverse, the sliding table 210 is sent back into the steam pot 110, the electric rotating door 130 drives to close one end of the steam pot 110, the second motor 310 drives the threaded rod 311 to rotate and screw with the square plate 320, and drives a plurality of groups of inclined blocks 322 to move downward, each inclined block 322 corresponds to the convex position of the arc-shaped rod 232, the inclined blocks 322 on one side of the square plate 320 first contact the tubes, the inclined blocks 322 are squeezed from the middle, two tubes that are tightly attached together are separated, and the tubes are moved to the designated position along the arc of the arc-shaped rod 232, the inclined blocks 322 of the other rows are sequentially squeezed to separate the remaining tubes that are tightly attached together and move them to the designated position, the distance between the tubes is ensured, the inclined blocks 322 return to the position above the steam pot 110 after completion, the steam pot 110 drives to steam the tubes, and under the condition of no manual operation, the spacing adjustment mechanism 300 drives to quickly separate the tubes that are tightly attached together side by side, a plurality of arcs are arranged on the arc-shaped rod 232, the separated tubes slide along the trajectory of the arc-shaped rod 232 to the designated position, the distance between the tubes is ensured, the steam can flow more smoothly between the tubes, can uniformly surround each tube from all directions, and can fully penetrate into every corner inside the tube, so that the yarn fibers can uniformly absorb the moisture and heat in the steam, thereby ensuring the consistency of the steaming effect, uniform steaming can ensure that the dye fixing effect of the dye on the yarn is uniform, avoids problems such as color mottling and uneven dyeing, and improves the quality and pass rate of the product.

[0053] Embodiment two

[0054] As Figure 5 The second round rod 231 is fixed on the top of the first square rod 230, and the T-shaped plate 233 is slid between the outer wall of the second round rod 231 and the outer wall of the sliding table 210, and the outer wall is provided with an arc-shaped hole 234 at the arc-shaped rod 232, so that the personnel can conveniently take down the cheese.

[0055] In the specific implementation, when the steaming is completed, the electric rotary door 130 drives to open one end of the steam pot 110, the first motor 220 drives the spur gear 222 to rotate and engage with the toothed plate 211, drives the sliding table 210 to slide out of the steam pot 110, and the cheese placing mechanism 200 is pushed out of the steam pot 110, the personnel pushes the trolley 120 without cheese to the side of the cheese placing mechanism 200, and aligns the cylinder 121 with one end of the arc-shaped rod 232, and the personnel pushes the T-shaped plate 233, and the T-shaped plate 233 slides with the second round rod 231 and the sliding table 210, and all cheeses placed on the arc-shaped rod 232 are pushed into the corresponding cylinder 121 along one end of the arc-shaped rod 232, and the replacement is completed. By pushing the T-shaped plate 233, the T-shaped plate 233 slides along the second round rod 231, the steamed cheeses on the arc-shaped rod 232 can be quickly pushed out and pushed into the corresponding cylinder 121 for placement, thereby effectively improving the disassembly efficiency of the cheeses, reducing the labor intensity, and reducing the stop time.

[0056] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalents of the elements of the claims are intended to be embraced by the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

[0057] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A cheese steaming treatment device, comprising: a steaming mechanism (100) comprising a steam pot (110) and a trolley (120), the steam pot (110) being fixedly connected at one end with an electric rotary door (130); characterized in that it further comprises: a plurality of cylinders (121) fixedly arranged at equal intervals inside the trolley (120); a cheese placing mechanism (200) fixedly arranged inside the steam pot (110), capable of placing cheeses at equal intervals and facilitating the replacement of cheeses; a distance adjusting mechanism (300) fixedly arranged at the top of the steam pot (110), capable of separating cheeses that are in close contact and ensuring the distance.

2. A cheese steaming apparatus as claimed in claim 1, wherein, The cheese placing mechanism (200) comprises: a sliding table (210) slidingly inserted into the steam pot (110), both sides of the bottom wall of the sliding table (210) being fixedly connected with a toothed plate (211), both sides of one end of the sliding table (210) being fixedly connected with a rotating seat (212), and the rotating seat (212) being rotatably connected with a hub (213); a first motor (220) fixedly connected with one side of the outer wall of the steam pot (110), the rotating shaft of the first motor (220) being fixedly connected with a round rod one (221); two spur gears (222) fixedly arranged at both ends of the round rod one (221) and in meshing transmission with the toothed plate (211).

3. A cheese steaming apparatus as claimed in claim 1, wherein The cheese placing mechanism (200) comprises: a plurality of square rods one (230) fixedly arranged at equal intervals on one side of the outer wall of the sliding table (210), the outer wall of the square rod one (230) being fixedly connected at equal intervals with a plurality of arc-shaped rods (232).

4. A cheese steaming apparatus as claimed in claim 1, wherein The cheese placing mechanism (200) comprises: a round rod two (231) fixedly arranged at the top of the square rod one (230); a T-shaped plate (233) slidingly arranged between the outer wall of the round rod two (231) and the outer wall of the sliding table (210), and an arc-shaped hole (234) being formed at the outer wall of the T-shaped plate (233) at the position of the arc-shaped rod (232), capable of facilitating the removal of cheeses by personnel.

5. A cheese steaming apparatus as claimed in claim 1, wherein The distance adjusting mechanism (300) comprises: a second motor (310) fixedly connected with the top wall of the steam pot (110), the rotating shaft of the second motor (310) being fixedly connected with a threaded rod (311); a U-shaped frame (312) fixedly connected with the top wall of the steam pot (110) and rotatably connected at one end with the threaded rod (311); a square plate (320) screwed onto the outer wall of the threaded rod (311).

6. A cheese steaming apparatus as claimed in claim 1, wherein The distance adjusting mechanism (300) comprises: a plurality of groups of square rods two (321) fixedly arranged at equal intervals on one side of the square plate (320); a plurality of groups of square rods three (323) fixedly arranged at equal intervals on the outer wall of the square plate (320) at the side of the square rods two (321), the length of the square rods three (323) being shorter than that of the square rods two (321); a plurality of groups of square rods four (324) fixedly arranged at equal intervals on the outer wall of the square plate (320) at the side of the square rods three (323), the length of the square rods four (324) being shorter than that of the square rods three (323); a plurality of groups of square rods five (325) fixedly arranged at equal intervals on the outer wall of the square plate (320) at the side of the square rods four (324), the length of the square rods five (325) being shorter than that of the square rods four (324).

7. A cheese steaming apparatus as claimed in claim 1, wherein The distance adjusting mechanism (300) comprises: The inclined blocks (322) are arranged on the outer walls of the one ends of the square bars (321), (323), (324) and (325) respectively, and the outer walls of the inclined blocks (322) are provided with rounded corners.

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