CN211988560U

CN211988560U - Rubber reaction kettle

Info

Publication number: CN211988560U
Application number: CN202020511017.4U
Authority: CN
Inventors: 张银昌
Original assignee: Hebei Yinchang Regenerated Rubber Co ltd
Current assignee: Hebei Yinchang Regenerated Rubber Co ltd
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2020-11-24
Anticipated expiration: 2030-04-09

Abstract

The utility model relates to the technical field of rubber production equipment, a rubber reaction kettle is disclosed, which comprises a kettle body, a heating device and a stirring device, wherein the kettle body is of an internal cavity column structure, the heating device and the stirring device are oppositely fixedly connected at two sides of the kettle body, the heating device adopts a mode of kettle body local heating for heating and is arranged at the right side of the kettle body, the heating device is electrically connected with the kettle body through a metal wire bolt, the stirring device is arranged at the left side of the kettle body, two sides of the bottom of the kettle body are respectively provided with a fixing seat, the tops of the fixing seats are respectively provided with a groove, the bottom of the kettle body is connected with the inner wall of the groove opened at the top of the fixing seat, the bottom of the kettle body is provided with a discharge valve, the middle position at the top of the kettle body is provided with a feeding hole, the bottom of the feeding hole is fixedly connected, the stirring uniformity of auxiliary materials such as raw materials, liquid parts and the like is ensured, and the production quality of rubber products is effectively improved.

Description

Rubber reaction kettle

Technical Field

The utility model relates to a rubber production facility technical field specifically is a rubber reation kettle.

Background

Rubber need use reation kettle to process rubber raw materials at the recovery in-process, makes the vulcanization of rubber raw materials, wherein among the raw materials composition in the reation kettle, water accounts for about 22%, the softener accounts for about 11%, the rest is rubber raw materials, is water and softener part in the reation kettle and is the liquid, accounts for about the internal 1/3 space of cauldron. In the reaction kettle in the prior art, an overall heating mode of the reaction kettle is generally adopted, so that the overall temperature of a kettle body of the reaction kettle reaches 800-900 degrees, the internal temperature of the reaction kettle reaches about 800 degrees, and thus the rubber raw material immersed in a liquid part in the kettle body is reacted, namely only the part needing to be contacted with the rubber raw material is required to be maintained at 800 plus 900 degrees, but when the reaction kettle is integrally heated, the kettle body without the liquid part is contacted with the rubber raw material, the rubber is cracked at high temperature to generate a large amount of waste gas, the quality of the rubber is influenced, the cracking can be generated when the temperature of the reaction kettle is too high, the rubber raw material cannot be sufficiently reacted with the liquid part when the temperature is too low, and therefore, the temperature control of the reaction; the inside raw materials of reation kettle still need stir through the inside rubber materials to reation kettle in the heating, makes its rubber materials and auxiliary materials such as the inside liquid part of reation kettle stir each other evenly, and current reation kettle equipment stirring effect is relatively poor to influence the quality of rubber product, further lead to production quality's decline.

Therefore, a rubber reaction kettle is designed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a rubber reaction kettle for it is difficult and stirring effect poor to solve reation kettle temperature control, influences rubber product quality, problem that production quality is low.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

a rubber reaction kettle comprises a kettle body, a heating device and a stirring device, wherein the kettle body is of an internal cavity column structure, the heating device and the stirring device are oppositely fixedly connected to two sides of the kettle body, the heating device is heated by adopting a kettle body local heating mode and is arranged on the right side of the kettle body, the heating device is electrically connected with the kettle body through a metal wire bolt, the stirring device is arranged on the left side of the kettle body, the two sides of the bottom of the kettle body are respectively provided with a fixed seat, the tops of the two groups of fixed seats are respectively provided with a groove, the bottom of the kettle body is connected with the inner wall of the groove formed in the top of the fixed seat, the bottom of the kettle body is fixedly connected with the top of the fixed seat, the bottom of the kettle body is provided with a discharge valve, the middle position of the top of the kettle body is provided with a feeding hole, the bottom of the feeding hole is fixedly connected, one side of the top of the kettle body is provided with an exhaust port.

Furthermore, the heating device comprises a supporting column, a first temperature sensor, a second temperature sensor, a first controller, a second controller, a first heating tube and a second heating tube, the supporting column is arranged on the right side of the first shell, the first controller and the second controller are respectively fixedly connected to the top of the supporting column, a plurality of metal wire bolts are fixedly connected between the supporting column and the first shell, the first temperature sensor and the second temperature sensor are respectively arranged on the outer wall of the first shell, the first temperature sensor and the second temperature sensor are respectively fixedly connected with the outer wall of the first shell through bolts, the first temperature sensor is fixedly connected with the top of the outer wall of the first shell, the second temperature sensor is fixedly connected with the bottom of the outer wall of the first shell, the first controller is electrically connected with the first temperature sensor, and the first controller is connected with the first heating tube, the first heating pipe is electrically connected with the first controller through a metal wire bolt, the first heating pipe is fixed on the outer wall of the first shell close to the top position in a surrounding mode, the covering area of the first heating pipe is two thirds of the outer wall of the first shell, the first heating pipe is arranged on the outer wall of the first shell in a surrounding mode from top to bottom, the second controller is electrically connected with the second temperature sensor, the second controller is connected with the second heating pipe, the second heating pipe is electrically connected with the second controller through a metal wire bolt, the second heating pipe is fixed on the outer wall of the first shell close to the bottom position in a surrounding mode, the covering area of the second heating pipe is one third of the area of the outer wall of the first shell, and the second heating pipe is arranged on the outer wall of the first shell in a surrounding mode from bottom to top.

Further, the cauldron body includes first shell, trace, bearing and the stirring body, first shell is the inner cavity structure, and first shell one side has seted up the through-hole, the trace alternates inside the through-hole that first shell one side was seted up, and the through-hole inner wall swing joint that trace and first shell one side were seted up, the trace passes through bearing and first shell inner wall swing joint, and trace swing joint in bearing, the trace surface is equipped with a plurality of stirring body, and the stirring body is the arc structure, stirring body fixed connection in trace.

Further, agitating unit includes gim peg, second shell, motor and transmission band, the second shell is inside hollow structure, and the second shell passes through trace and cauldron body swing joint, second shell surface four corners is equipped with the gim peg respectively, and gim peg and second shell be integrated into one piece, and the through-hole has been seted up towards cauldron body one side to the second shell, cauldron internal portion is located to trace one end, and the trace other end is located inside the through-hole that the second shell was seted up towards cauldron body one side, and the trace passes through transmission band and motor swing joint, transmission band one end and trace swing joint, transmission band other end swing joint in the steering spindle of motor, and motor fixed connection in second shell inner wall.

Further, the fixing bolt comprises a screw, a first baffle, a spring and a second baffle, a through hole is formed in the top of the first baffle, the screw penetrates through the inner side of the through hole formed in the top of the first baffle, the outer surface of the screw is provided with threads, the screw is arranged close to the bottom of the screw and provided with the second baffle, the second baffle is movably connected with the screw, the spring is arranged between the second baffle and the first baffle, the screw penetrates through the inner side of the spring, the top of the spring is connected with the bottom of the first baffle, and the bottom of the spring is connected with the top of the second baffle.

Further, inside first bracing piece and the second bracing piece of being equipped with of first shell, and the both ends of first bracing piece and second bracing piece respectively with the inner wall fixed connection of first shell, the middle part of first bracing piece and the middle part fixed connection of second bracing piece, and first bracing piece and second bracing piece are cross and intersect, the through-hole has been seted up to first bracing piece and second bracing piece cross position, and inside the trace interlude through-hole to with through-hole inner wall swing joint.

The utility model has the advantages that:

1. the utility model discloses a, through setting up first controller and second controller to cauldron body one side, first controller passes through the metal wire bolt and is connected with the first heating pipe electric connection that the cauldron body was inside sets up, first controller heats first heating pipe, because first heating pipe encircles to be fixed on the inboard inner wall that is close to the top position of first shell, thereby realized the effect that first heating pipe is to the local heating of the inside top position of cauldron body, the second controller is connected with the second heating pipe electric connection, and the second heating pipe encircles to be fixed on the inboard inner wall that is close to the bottom position of first shell, thereby realized the process that the second heating pipe heats the raw materials of cauldron body inside, and because first controller and second controller respectively with correspond the connection temperature sensor, when the internal temperature of cauldron is too high, temperature sensor sends the instruction to electrically connected first controller or second controller, the heating of the first heating pipe or the second heating pipe is stopped, the internal temperature control capability of the reaction kettle is further improved, and electric energy is saved.

2. The utility model discloses a, through setting up trace and motor to agitating unit, because the trace passes through transmission band and motor swing joint, transmission band swing joint is on the steering spindle of motor, it rotates to drive the trace through the motor, thereby realized that the motor drives the baffle that sets up on the trace surface and rotates, further realized that agitating unit evenly stirs auxiliary materials such as the rubber feedstock of the internal portion of cauldron and liquid part, guaranteed the stirring uniformity of auxiliary materials such as raw materials and liquid part, the effectual production quality who promotes rubber products.

3. The utility model discloses a, through setting up first baffle, spring and second baffle to the gim peg, when the gim peg is using, screw and gim peg reciprocal anchorage have guaranteed that the screw is difficult for dropping, the effectual operating personnel that has promoted is to agitating unit's installation ability, and easy operation, and the practicality is strong.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the front structure of the kettle body of the present invention;

FIG. 3 is a schematic side view of the autoclave body of the present invention;

FIG. 4 is a schematic structural view of the stirring device of the present invention;

fig. 5 is a schematic view of the fixing bolt of the present invention.

In the figure: 1. a kettle body; 2. a stirring device; 3. a heating device; 4. a second housing; 5. a fixing bolt; 6. a first controller; 7. a second controller; 8. a metal wire bolt; 9. an exhaust port; 10. a feeding port; 11. a discharge valve; 12. a fixed seat; 13. a first housing; 14. a linkage rod; 15. a bearing; 16. a stirring body; 17. a first heat-generating pipe; 18. a second heat generating tube; 19. a motor; 20. a conveyor belt; 21. a screw; 22. a first baffle plate; 23. a spring; 24. a second baffle.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to FIGS. 1-5: a rubber reaction kettle comprises a kettle body 1, a heating device 3 and a stirring device 2, wherein the kettle body 1 is of an internal cavity column structure, the heating device 3 and the stirring device 2 are oppositely fixedly connected to two sides of the kettle body 1, the kettle body 1 comprises a first shell 13, a linkage rod 14, a bearing 15 and a stirring body 16, the first shell 13 is of an internal cavity structure, a through hole is formed in one side of the first shell 13, the linkage rod 14 is inserted into the through hole formed in one side of the first shell 13, the linkage rod 14 is movably connected with the inner wall of the first shell 13 through the bearing 15, the linkage rod 14 is movably connected with the bearing 15, the outer surface of the linkage rod 14 is provided with a plurality of stirring bodies 16, the stirring bodies 16 are of an arc structure, the stirring bodies 16 are fixedly connected with the linkage rod 14, the heating device 3 adopts a mode of local heating of the kettle body to heat, locate the 1 right side of the cauldron body, and heating device 3 ties 8 and the 1 electric connection of the cauldron body through the wire, first shell 13 is inside to be equipped with first bracing piece and second bracing piece, and the both ends of first bracing piece and second bracing piece respectively with the inner wall fixed connection of first shell 13, the middle part of first bracing piece and the middle part fixed connection of second bracing piece, and first bracing piece and second bracing piece are the cross and intersect, the through-hole has been seted up to first bracing piece and second bracing piece cross position, and inside the trace 14 interlude through-hole to with through-hole inner wall swing joint.

Preferably, the heating device 3 comprises a supporting column, a first temperature sensor, a second temperature sensor, a first controller 6, a second controller 7, a first heating pipe 17 and a second heating pipe 18, the supporting column is arranged on the right side of the first casing 13, the first controller 6 and the second controller 7 are respectively and fixedly connected to the top of the supporting column, a plurality of metal wire bolts 8 are fixedly connected between the supporting column and the first casing 13, the first temperature sensor and the second temperature sensor are respectively arranged on the outer wall of the first casing 13, the first temperature sensor and the second temperature sensor are respectively and fixedly connected with the outer wall of the first casing 13 through bolts, the first temperature sensor is fixedly connected with the top of the outer wall of the first casing 13, the second temperature sensor is fixedly connected with the bottom of the outer wall of the first casing 13, the first controller 6 is electrically connected with the first temperature sensor, the first controller 6 is connected with the first heating pipe 17, the first heating pipe 17 is electrically connected with the first controller 6 through a metal wire bolt 8, the first heating pipe 17 is fixed on the outer wall of the first shell 13 near the top position in a surrounding manner, the first heating pipe 17 surrounds the outer wall with the covering area of two thirds of the first shell 13, the first heating pipe 17 surrounds the outer wall of the first shell 13 from top to bottom, the second controller 7 is electrically connected with the second temperature sensor, the second controller 7 is connected with the second heating pipe 18, the second heating pipe 18 is electrically connected with the second controller 7 through the metal wire bolt 8, the second heating pipe 18 surrounds the outer wall of the first shell 13 near the bottom position, the covering area of the second heating pipe 18 surrounds the outer wall of the first shell 13 with the covering area of one third of the outer wall of the first shell 13, the second heating pipe 18 surrounds the outer wall of the first shell 13 from bottom to top, the stirring device 2 is arranged on the left side of the kettle body 1, the two sides of the bottom of the kettle body 1 are respectively provided with a fixed seat 12, the tops of two groups of fixed seats 12 are respectively provided with a groove, the bottom of the kettle body 1 is connected with the inner wall of the groove formed in the top of the fixed seat 12, the bottom of the kettle body 1 is fixedly connected with the top of the fixed seat 12, a discharge valve 11 is fixedly connected with the bottom of the kettle body 1, the middle position of the top of the kettle body 1 is provided with a feeding port 10, the bottom of the feeding port 10 is fixedly connected with the top of the fixed box, the feeding port 10 is of an internal hollow structure, the top of the feeding port 10 is provided with a through hole which penetrates into the kettle body 1, one side of the top of the kettle body 1 is provided with an exhaust port 9, one side of the kettle body 1 is provided with a first controller 6 and a second controller 7, the first controller 6 is electrically connected, because the first heating pipe 17 encircles and fixes on the inboard inner wall that is close to the top position of first shell 13, thereby realized the effect that first heating pipe 17 locally heats the inside top position of the cauldron body 1, because second controller 7 and second heating pipe 18 electric connection, and second heating pipe 18 encircles and fixes on the inboard inner wall that is close to the bottom position of first shell 13, thereby realized the process of second heating pipe 18 to the inside raw materials heating of the cauldron body 1, and because first controller 6 and second controller 7 respectively with correspond and be connected temperature sensor, when the inside high temperature of the cauldron body 1, temperature sensor sends the instruction to electrically connected first controller 6 or second controller 7, stop the heating to first heating pipe 17 or second heating pipe 18, further promoted the inside temperature control ability of reation kettle, and practice thrift the electric energy more.

Further, the stirring device 2 comprises a fixing bolt 5, a second shell 4, a motor 19 and a transmission belt 20, the second shell 4 is of an internal hollow structure, the second shell 4 is movably connected with the kettle body 1 through a linkage rod 14, the fixing bolts 5 are respectively arranged at four corners of the outer surface of the second shell 4, the fixing bolts 5 and the second shell 4 are integrally formed, the second shell 4 is provided with a through hole towards one side of the kettle body 1, one end of the linkage rod 14 is arranged in the kettle body 1, the other end of the linkage rod 14 is arranged in the through hole arranged towards one side of the kettle body 1 of the second shell 4, the linkage rod 14 is movably connected with the motor 19 through the transmission belt 20, one end of the transmission belt 20 is movably connected with the linkage rod 14, the other end of the transmission belt 20 is movably connected with a steering shaft of the motor 19, the motor 19 is fixedly connected with the inner wall of the second shell 4, the linkage rod 14 and the motor 19 are arranged, because the trace 14 passes through transmission band 20 and motor 19 swing joint, transmission band 20 swing joint is on motor 19's steering spindle, drive trace 14 through motor 19 and rotate, thereby realized that motor 19 drives the baffle that sets up on the trace 14 surface and rotates, further realized agitating unit 2 and carried out even stirring to auxiliary materials such as raw materials and liquid part inside the cauldron body 1, guaranteed the stirring uniformity of auxiliary materials such as raw materials and liquid part, the effectual production quality who promotes rubber products.

Further, the fixing bolt 5 comprises a screw 21, a first baffle 22, a spring 23 and a second baffle 24, a through hole is formed in the top of the first baffle 22, the screw 21 penetrates through the inner side of the through hole formed in the top of the first baffle 22, a thread is formed in the outer surface of the screw 21, the second baffle 24 is arranged at a position, close to the bottom, of the screw 21, the second baffle 24 is movably connected with the screw 21, the spring 23 is arranged between the second baffle 24 and the first baffle 22, the screw 21 penetrates through the inner side of the spring 23, the top of the spring 23 is connected with the bottom of the first baffle 22, the bottom of the spring 23 is connected with the top of the second baffle 24, the first baffle 22, the spring 23 and the second baffle 24 are arranged on the fixing bolt 5, when the fixing bolt 5 is used, the screw 21 and the fixing bolt 5 are fixed to each other, the screw 21 is ensured to be not easy to fall off, and the installation capability of an operator, and the operation is simple, and the practicability is strong.

To sum up, the utility model discloses when using, through setting up trace 14 and motor 19 to agitating unit 2, because trace 14 passes through transmission band 20 and motor 19 swing joint, transmission band 20 swing joint is on the steering spindle of motor 19, drive trace 14 through motor 19 and rotate, thereby realized that motor 19 drives the baffle that sets up on the outer surface of trace 14 and rotates, further realized agitating unit 2 and carried out the even stirring to auxiliary materials such as raw materials and liquid part inside the kettle body 1, guaranteed the stirring uniformity of auxiliary materials such as raw materials and liquid part, the production quality of the rubber product has effectively been promoted; the first controller 6 and the second controller 7 are arranged on one side of the kettle body 1, the first controller 6 is electrically connected with a first heating pipe 17 arranged in the kettle body 1 through a metal wire bolt 8, the first controller 6 heats the first heating pipe 17, the first heating pipe 17 is fixed on the inner wall of the inner side of the first shell 13 close to the top position in a surrounding manner, so that the effect of the first heating pipe 17 on locally heating the top position in the kettle body 1 is realized, the second controller 7 is electrically connected with the second heating pipe 18, and the second heating pipe 18 is fixed on the inner wall of the inner side of the first shell 13 close to the bottom position in a surrounding manner, so that the process of heating the raw materials in the kettle body 1 by the second heating pipe 18 is realized, and the first controller 6 and the second controller 7 are respectively and correspondingly connected with a temperature sensor, when the temperature in the kettle body 1 is too high, the temperature sensor gives an instruction to the electrically connected first controller 6 or the second controller 7, stop the heating to first heating tube 17 or second heating tube 18, further promoted the inside temperature control ability of reation kettle, through setting up first baffle 22, spring 23 and second baffle 24 to gim peg 5, when gim peg 5 is using, screw 21 and gim peg 5 reciprocal anchorage have guaranteed that screw 21 is difficult for dropping, the effectual installation ability of having promoted operating personnel to agitating unit 2, and easy operation, the practicality is strong.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a rubber reation kettle, includes the cauldron body, heating device and agitating unit, its characterized in that: the cauldron body is inside cavity columnar structure, and heating device becomes opposite form fixed connection in cauldron body both sides with agitating unit, heating device adopts the mode of cauldron body local heating to heat, locates cauldron body right side, and heating device through wire bolt and cauldron body electric connection, cauldron body left side is located to agitating unit, and cauldron body bottom both sides are equipped with the fixing base respectively, and two sets of the fixing base top is seted up flutedly respectively, and cauldron body bottom links to each other with the open recess inner wall in fixing base top, and cauldron body bottom fixed connection in fixing base top, and cauldron body bottom is equipped with the bleeder valve, and cauldron body top intermediate position is equipped with the pan feeding mouth, pan feeding mouth bottom and fixation case top fixed connection, and the pan feeding mouth is inside hollow structure, and the through-hole has been seted up at pan feeding mouth top, and the through-hole runs through to the internal portion of cauldron, and the gas vent has been seted.

2. A rubber reaction kettle according to claim 1, wherein: the heating device comprises a supporting column, a first temperature sensor, a second temperature sensor, a first controller, a second controller, a first heating pipe and a second heating pipe, wherein the supporting column is arranged on the right side of the first shell, the first controller and the second controller are respectively and fixedly connected to the top of the supporting column, a plurality of metal wire bolts are fixedly connected between the supporting column and the first shell, the first temperature sensor and the second temperature sensor are respectively arranged on the outer wall of the first shell, the first temperature sensor and the second temperature sensor are respectively and fixedly connected with the outer wall of the first shell through bolts, the first temperature sensor is fixedly connected with the top of the outer wall of the first shell, the second temperature sensor is fixedly connected with the bottom of the outer wall of the first shell, the first controller is electrically connected with the first temperature sensor, the first controller is connected with the first heating pipe, and the first heating pipe is electrically connected with the first controller through the metal wire bolts, the first heating pipe encircles and fixes on the outer wall that is close to the top position at first shell, and first heating pipe encircles the outer wall that the area of coverage is first shell two-thirds, and first heating pipe encircles on first shell outer wall for from top to bottom mode, the second controller is electric connection with second temperature sensor, and the second controller links to each other with the second heating pipe, the second heating pipe passes through metal wire bolt and second controller electric connection, and the second heating pipe encircles and fixes on the outer wall that is close to the bottom position at first shell, and the second heating pipe encircles the area of coverage for the one-third area of first shell outer wall, and the second heating pipe is by supreme mode ring winding on first shell outer wall down.

3. A rubber reaction kettle according to claim 1, wherein: the cauldron body includes first shell, trace, bearing and stirring body, first shell is the inner cavity structure, and first shell one side has seted up the through-hole, the trace alternates inside the through-hole that first shell one side was seted up, and the through-hole inner wall swing joint that trace and first shell one side were seted up, the trace passes through bearing and first shell inner wall swing joint, and trace swing joint in bearing, the trace surface is equipped with a plurality of stirring body, and the stirring body is the arc structure, stirring body fixed connection in trace.

4. A rubber reaction kettle according to claim 3, characterized in that: agitating unit includes gim peg, second shell, motor and transmission band, the second shell is inside hollow structure, and the second shell passes through trace and cauldron body swing joint, second shell surface four corners is equipped with the gim peg respectively, and gim peg and second shell be integrated into one piece, and the through-hole has been seted up towards cauldron body one side to the second shell, cauldron internal portion is located to trace one end, and the trace other end is located inside the through-hole that the second shell was seted up towards cauldron body one side, and the trace passes through transmission band and motor swing joint, transmission band one end and trace swing joint, transmission band other end swing joint in the steering spindle of motor, and motor fixed connection in second shell inner wall.

5. A rubber reaction kettle according to claim 4, characterized in that: the fixing bolt comprises a screw, a first baffle, a spring and a second baffle, wherein a through hole is formed in the top of the first baffle, the screw penetrates through the inner side of the through hole formed in the top of the first baffle, the outer surface of the screw is provided with threads, the screw is arranged close to the bottom of the first baffle, the second baffle is movably connected with the screw, the spring is arranged between the second baffle and the first baffle, the screw penetrates through the inner side of the spring, the top of the spring is connected with the bottom of the first baffle, and the bottom of the spring is connected with the top of the second baffle.

6. A rubber reaction kettle according to claim 3, characterized in that: the inner wall fixed connection of first shell, the middle part of first bracing piece and the middle part fixed connection of second bracing piece, and first bracing piece and second bracing piece be the cross and intersect, and the through-hole has been seted up to first bracing piece and second bracing piece cross position, and inside the trace interlude through-hole to with through-hole inner wall swing joint.