Continuous dehydrator for printing and dyeing chemical fiber cloth

Abstract

The invention discloses a continuous dehydrator for printing and dyeing chemical fiber cloth, and relates to the technical field of cloth dehydration, the continuous dehydrator comprises a dehydration box, the interior of the dehydration box is in a circular cavity shape, and communicated inlets and outlets are formed in the two sides of the dehydration box; the dehydration assembly comprises auxiliary dehydration assemblies distributed on the upper side and the lower side of the inlet and outlet in a central symmetry mode and a main dehydration assembly arranged in the middle of the dehydration box; the drainage pipe is fixedly arranged at the bottom of the dehydration box, so that liquid accumulated in the dehydration box is discharged from the drainage pipe. The main dewatering assembly is arranged in the middle of the circular cavity of the dewatering box, cloth can be continuously dewatered in the conveying process, meanwhile, auxiliary dewatering assemblies arranged on the upper side and the lower side of the main dewatering assembly in a central symmetry mode are matched, printing and dyeing chemical fiber cloth is subjected to multiple times of dewatering operation in the continuous penetrating process, the dewatering effect is improved, and the dewatering efficiency is improved. Meanwhile, the dehydration efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cloth dewatering, in particular to a continuous dewatering machine for printing and dyeing chemical fiber cloth. BACKGROUND

[0002] In the modern textile industry, the production process of printing and dyeing chemical fiber cloth involves multiple links, and cloth dewatering is one of the important processing steps in the production process of printing and dyeing chemical fiber cloth.

[0003] In the prior art, the dewatering of printing and dyeing chemical fiber cloth generally adopts centrifugal dewatering. During the dewatering operation, the printing and dyeing chemical fiber cloth needs to be sent into the centrifugal dewatering equipment in batches, and then taken out as a whole after the dewatering is completed, and then re-arranged and transmitted to the subsequent processing equipment; this results in the need for the whole cloth to be taken and placed before and after dewatering, which increases the process steps, makes the dewatering operation more complicated, increases the work intensity, and also consumes time, resulting in a decrease in the dewatering processing efficiency of the printing and dyeing chemical fiber cloth. Therefore, a continuous dewatering machine for printing and dyeing chemical fiber cloth is proposed. SUMMARY

[0004] The present application aims to provide a continuous dewatering machine for printing and dyeing chemical fiber cloth to solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a continuous dewatering machine for printing and dyeing chemical fiber cloth, comprising:

[0006] A dewatering box, which is internally circular-cavity-shaped and has inlet and outlet openings communicated on both sides;

[0007] A dewatering assembly, which comprises auxiliary dewatering assemblies symmetrically distributed on the upper and lower sides of the inlet and outlet openings and a main dewatering assembly arranged in the middle of the dewatering box;

[0008] A drain pipe, which is fixedly arranged at the bottom of the dewatering box to drain the liquid accumulated in the dewatering box.

[0009] Preferably, the auxiliary dewatering assembly comprises:

[0010] A cold pressing plate and a hot pressing plate, which are symmetrically arranged at the top and bottom of the inner walls of the dewatering box;

[0011] A plurality of pressing rollers, which are movably arranged on the side of the cold pressing plate and the hot pressing plate facing the inner wall of the dewatering box, so that the cloth is transmitted on the side of the cold pressing plate and the hot pressing plate facing the inner wall of the dewatering box.

[0012] Preferably, a resilient telescopic roller frame is fixed between the compression roller and the inner wall of the dehydration tank, the thrust provided by the resilient telescopic roller frame to the compression roller gradually increases from top to bottom, and the opposite ends of the cold compression plate and the hot compression plate are rotationally connected with fixed pulleys.

[0013] Preferably, the main dehydration assembly comprises:

[0014] The dehydration rollers are two and are arranged in parallel and at intervals in the middle of the inner cavity of the dehydration tank, so that the cloth passes between the two dehydration rollers and is squeezed by the dehydration rollers to be dehydrated.

[0015] The taper head clamping plates are two and are arranged in an inverted V shape below the two dehydration rollers.

[0016] Preferably, the end of the taper head clamping plate away from the dehydration roller is circular and rotationally connected with the inner wall of the dehydration tank, and a torsional spring is fixed between the bottom of the taper head clamping plate and the inner wall of the dehydration tank.

[0017] Preferably, the outer walls of the two dehydration rollers are each provided with a wiping mechanism, the wiping mechanism comprising:

[0018] The wiping member is movably attached to the outer wall of the dehydration roller, so that the wiping member removes moisture from the outer wall of the dehydration roller by contacting the outer wall of the dehydration roller.

[0019] The electric push rod is fixedly arranged on the side of the wiping member away from the dehydration roller, and the electric push rod is used to drive the wiping member to move towards the outer wall of the dehydration roller.

[0020] Preferably, the telescopic end of the electric push rod is fixedly connected with an elastic compression spring, the outer wall of the elastic compression spring is slidably sleeved with a connecting pipe, a telescopic rod movably sleeved on the outer wall of the elastic compression spring is fixedly connected between the connecting pipe and the electric push rod, and the side of the connecting pipe away from the electric push rod is fixed with the wiping member.

[0021] Preferably, the wiping member comprises:

[0022] The incomplete cylindrical cover is rotationally connected with bearing sliding blocks at both ends, the bearing sliding blocks are slidably connected with the inner wall of the dehydration tank, and the bottom of the incomplete cylindrical cover is fixedly connected with a water outlet pipe.

[0023] The water-absorbing cotton roller is rotationally connected inside the incomplete cylindrical cover, the side wall of the water-absorbing cotton roller protrudes outside the incomplete cylindrical cover and movably attaches to the outer wall of the dehydration roller.

[0024] The scraper is fixedly connected to the bottom of the incomplete cylindrical cover near the dehydration roller.

[0025] Preferably, the outer wall of the dehydration tank is fixedly connected with a hollow cover in communication with the inlet and outlet, and two cylindrical rods are rotationally connected at intervals in the hollow cover.

[0026] Preferably, the hollow cover is provided with a rectangular groove on one side, and a rectangular through groove on the other side, the rectangular groove and the rectangular through groove are both slidably connected with sliding seats, the cylindrical rod is rotatably connected with the sliding seat, the sliding seat and the inner wall of the rectangular groove are fixedly connected with return springs, one end of the cylindrical rod extends to the end of the rectangular through groove and is sleeved with a circular arc inclined surface pipe, the circular arc inclined surface pipe is fixedly connected with the inner wall of the rectangular through groove, the end of the cylindrical rod close to the circular arc inclined surface pipe is fixedly connected with a connecting plate, and the end of the connecting plate close to the circular arc inclined surface pipe is fixedly connected with a driven protruding block.

[0027] Compared with the prior art, the technical effects of the present application are:

[0028] (1) The present application sets a main dewatering assembly in the middle of the circular cavity of the dewatering box, which can realize continuous dewatering of the cloth during transmission, and cooperates with the auxiliary dewatering assemblies symmetrically arranged on the upper and lower sides of the main dewatering assembly, so that the printed chemical fiber cloth is subjected to multiple dewatering operations during continuous transmission, which not only improves the dewatering effect, but also improves the dewatering efficiency.

[0029] (2) The present application sets a wiping mechanism on the side wall of the dewatering roller, and sets a scraper on the bottom of the incomplete cylindrical cover in the wiping mechanism, so that the water content in the water-absorbing cotton roller can be automatically squeezed out when it is too high, which ensures the wiping effect of the water-absorbing cotton roller on the outer wall of the dewatering roller, thereby assisting to improve the squeezing dewatering effect of the dewatering roller on the cloth.

[0030] (3) The present application installs a hollow cover on the inlet and outlet positions of the outer wall of the dewatering box, cooperates with the settings of the sliding seat, the return spring, the circular arc inclined surface pipe, the connecting plate and the driven protruding block in the hollow cover, so that the two cylindrical rods can swing left and right during the transmission of the cloth, so as to achieve the cloth correction function, ensure the flatness of the cloth when entering the dewatering box, and prevent the cloth from appearing creases in the squeezing dewatering due to wrinkles. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0032] Figure 2 It is a schematic diagram of the front view of the dewatering box of the present application.

[0033] Figure 3 It is a schematic diagram of the three-dimensional structure of the wiping member of the present application.

[0034] Figure 4 It is a schematic diagram of the front view of the wiping assembly of the present application.

[0035] Figure 5 It is a schematic diagram of the A part of the present application. Figure 2 ​

[0036] Figure 6 This is a top cross-sectional view of the feeding assembly of the present invention.

[0037] In the diagram: 100, dehydration tank; 101, cold press plate; 102, hot press plate; 103, elastic telescopic roller frame; 104, pressure roller; 105, fixed pulley; 106, inlet / outlet; 107, drain pipe; 108, dehydration roller; 109, incomplete cylindrical cover; 110, bearing slider; 111, absorbent cotton roller; 112, scraper; 113, water outlet pipe; 114, conical clamp; 115, torsion spring; 116, electric push rod; 117, connecting pipe; 118, telescopic rod; 119, elastic compression spring; 120, hollow cover; 121, cylindrical rod; 122, rectangular groove; 123, return spring; 124, rectangular through groove; 125, arc-shaped inclined tube; 126, connecting plate; 127, driven protrusion; 128, sliding seat. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] This invention provides, for example Figures 1-6 The image shows a continuous dewatering machine for dyeing and printing chemical fiber fabrics.

[0040] Example 1: Includes a dehydration tank 100, the interior of which is a circular cavity with interconnected inlets and outlets 106 on both sides. The dehydration assembly includes auxiliary dehydration components symmetrically distributed above and below the inlets and outlets 106 and a main dehydration assembly located in the middle of the dehydration tank 100. The auxiliary dehydration components are divided into two parts, which are symmetrically arranged above and below the two inlets and outlets 106, forming a channel with the main dehydration assembly for the transmission of dyed chemical fiber fabrics, causing the fabric to form a dart-shaped pattern within the dehydration tank 100. The conveying trajectory is designed to utilize the gravity of the liquid, allowing it to be separated from the dyed chemical fiber fabric and discharged downwards, extending the fabric's conveying path and maximizing the dehydration process. The drain pipe 107 is fixedly installed at the bottom of the dehydration tank 100, allowing the liquid accumulated inside the dehydration tank 100 to be discharged through the drain pipe 107. The water separated from the fabric by squeezing falls to the bottom of the dehydration tank 100 and accumulates. Then, the separated water can be discharged in a directional manner through the external pipe connected to the drain pipe 107, facilitating centralized cleaning.

[0041] The auxiliary dewatering assembly comprises a cold pressing plate 101 and a hot pressing plate 102, which are centrally symmetrically arranged at the top and bottom of the inner wall of the dewatering box 100, a plurality of pressing rollers 104 are movably arranged on the side of the cold pressing plate 101 and the hot pressing plate 102 facing the inner wall of the dewatering box 100, so that the cloth is transmitted to the side of the cold pressing plate 101 and the hot pressing plate 102 facing the inner wall of the dewatering box 100, the elastic telescopic roller frame 103 is fixed between the pressing roller 104 and the inner wall of the dewatering box 100, the pushing force provided by the elastic telescopic roller frame 103 to the pressing roller 104 gradually increases from top to bottom, the opposite ends of the cold pressing plate 101 and the hot pressing plate 102 are rotatably connected with the fixed pulley 105, the side of the cold pressing plate 101 and the hot pressing plate 102 facing the inner wall of the dewatering box 100 is a smooth sprayed surface, the friction resistance is small, and the cloth transmission is facilitated, and the hot pressing plate 102 is internally integrated with an electric heating element such as an electric heating wire, then the pressing effect of the pressing roller 104 is matched, so that when the cloth is transmitted on the outer wall of the cold pressing plate 101, the pressing force of the pressing roller 104 can be continuously increased by the elastic telescopic roller frame 103, the continuous extrusion dewatering of the cloth during the transmission on the outer wall of the cold pressing plate 101 is realized, when the cloth is transmitted on the outer wall of the hot pressing plate 102, the extrusion of the elastic telescopic roller frame 103 and the pressing roller 104 is matched, and then the heating of the hot pressing plate 102 is matched, so that the ironing of the cloth surface is realized, the cloth can increase the surface flatness during dewatering, and the dewatering quality of the cloth is improved; in the prior art, the elastic telescopic roller frame 103 can be composed of a telescopic pipe with a spring, and the spring deformation amount in the elastic telescopic roller frame 103 gradually increases from top to bottom, so that the extrusion force provided by the elastic telescopic roller frame 103 to the pressing roller 104 gradually increases, the purpose of step-by-step increase is achieved, and the effects of extrusion dewatering and extrusion ironing of the cloth are improved.

[0042] The main dewatering assembly comprises a dewatering roller 108, the dewatering roller 108 is two and is parallelly and spacedly arranged in the middle of the inner cavity of the dewatering box 100, so that the cloth passes between the two dewatering rollers 108 and is extruded by the dewatering roller 108 for dewatering; through the opposite extrusion of the two dewatering rollers 108 on the cloth, the extrusion dewatering purpose of the cloth during the transmission is achieved, and the continuous dewatering demand of the cloth is met; in other embodiments, a moving mechanism can be additionally arranged between the two dewatering rollers 108 and the dewatering box 100, so as to adjust the distance between the two dewatering rollers 108, meet the use of cloth of various thicknesses, and drive the dewatering roller 108 by a motor, so that the rotating speed of the dewatering roller 108 is the same as the transmission rate of the cloth, and the cloth transmission load is increased by the friction resistance traction of the dewatering roller 108 is avoided;

[0043] Further, the taper head clamping plates 114 are two and arranged in an inverted V shape at a lower position between the two dehydration rollers 108, the end of the taper head clamping plates 114 away from the dehydration rollers 108 is circular and rotationally connected with the inner wall of the dehydration tank 100, and a torsion spring 115 is fixedly arranged between the bottom of the taper head clamping plates 114 and the inner wall of the dehydration tank 100; by using the taper head clamping plates 114 to extrude the surface of the cloth, and by using the outer wall of the taper head clamping plates 114 close to the cloth to be conical, the water overflowed after the cloth is extruded by the dehydration rollers 108 can be contacted with the top of the taper head clamping plates 114 and then slide down from the outer wall of the taper head clamping plates 114, so as to avoid the overflowed water from returning to the cloth at the lower position, which helps to improve the dehydration effect, and the torsion spring 115 provides elastic torque for the taper head clamping plates 114 to keep the taper head clamping plates 114 extruded and attached to the cloth, thereby improving the effect of draining water from the cloth.

[0044] Further, the outer wall of each of the two dehydration rollers 108 is provided with a wiping mechanism, the wiping mechanism includes a wiping member and an electric push rod 116, the wiping member is movably attached to the outer wall of the dehydration roller 108, so that the wiping member removes the water on the outer wall of the dehydration roller 108 by contacting the outer wall of the dehydration roller 108, the electric push rod 116 is fixedly arranged on the side of the wiping member away from the dehydration roller 108, and the electric push rod 116 is used to drive the wiping member to move towards the outer wall of the dehydration roller 108; during the extrusion and dehydration process of the dehydration roller 108 rotating, the water stains adhered to the outer wall of the dehydration roller 108 after dehydration can be wiped and absorbed by the wiping member by attaching the wiping member to the outer wall of the dehydration roller 108, thereby reducing the water on the outer wall of the dehydration roller 108 and ensuring the dehydration effect of the dehydration roller 108 on the cloth;

[0045] In a preferred embodiment, the electric push rod 116 is fixedly connected with an elastic compression spring 119 at the telescopic end, the elastic compression spring 119 is slidingly sleeved with a connecting pipe 117, the connecting pipe 117 is fixedly connected with a telescopic rod 118 movably sleeved on the outer wall of the elastic compression spring 119 between the electric push rod 116, and the side of the connecting pipe 117 away from the electric push rod 116 is fixedly connected with the wiping member; the cooperation of the connecting pipe 117, the telescopic rod 118 and the elastic compression spring 119 provides an elastic telescopic space between the electric push rod 116 and the incomplete cylindrical cover 109, which can meet the demand of adjusting the horizontal position of the dehydration roller 108 and enhance the adaptability of the electric push rod 116;

[0046] The wiping member comprises an incomplete cylindrical cover 109, both ends of the incomplete cylindrical cover 109 are rotationally connected with bearing sliding blocks 110, the bearing sliding blocks 110 are slidingly connected with the inner wall of the dehydration tank 100, the bottom of the incomplete cylindrical cover 109 is fixedly connected with a water outlet pipe 113 in communication, a water absorption cotton roller 111 is rotationally connected inside the incomplete cylindrical cover 109, the side wall of the water absorption cotton roller 111 protrudes outside the incomplete cylindrical cover 109 and movably abuts against the outer wall of the dehydration roller 108, and a scraper 112 is fixedly connected to the bottom of the incomplete cylindrical cover 109 close to one side of the dehydration roller 108. Through the setting of the incomplete cylindrical cover 109, not only the water absorption cotton roller 111 is supported, but also the water overflowing from the water absorption cotton roller 111 can be collected and discharged from the water outlet pipe 113, and through the setting of the scraper 112, the water on the outer wall of the dehydration roller 108 can be scraped off in the extrusion process of the water absorption cotton roller 111 and the outer wall of the dehydration roller 108, so that the dehydration effect of the cloth is not affected by too much water on the outer wall of the dehydration roller 108 in the extrusion process of the water absorption cotton roller 111.

[0047] In the embodiment 1, the dehydration tank 100 is further provided with a hollow cover 120 in communication with the inlet and outlet 106, two cylindrical rods 121 are rotationally connected in the hollow cover 120, the printed and dyed chemical fiber cloth passes between the two cylindrical rods 121 to be tensioned and stably transmitted, a rectangular recess 122 is formed in one side of the hollow cover 120, a rectangular through slot 124 is formed in the other side of the hollow cover 120, a sliding seat 128 is slidingly connected in the rectangular recess 122 and the rectangular through slot 124, the cylindrical rod 121 is rotationally connected with the sliding seat 128, a return spring 123 is fixedly connected between the sliding seat 128 and the inner wall of the rectangular recess 122, the cylindrical rod 121 extends to the end of the rectangular through slot 124 and is sleeved with a circular arc inclined pipe 125, the circular arc inclined pipe 125 is fixedly connected with the inner wall of the rectangular through slot 124, a connecting plate 126 is fixedly connected to one end of the cylindrical rod 121 close to the circular arc inclined pipe 125, a driven lug 127 is fixedly connected to the end of the connecting plate 126 close to the circular arc inclined pipe 125, the cylindrical rod 121 drives the connecting plate 126 to rotate, the end surface of the circular arc inclined pipe 125 guides the driven lug 127, the cylindrical rod 121 moves along the end surface of the circular arc inclined pipe 125 to translate, the sliding seat 128 extrudes the return spring 123 to generate an elastic pushing force, the cylindrical rod 121 reciprocally moves to correct the deviation of the cloth and stably transmit the cloth.

[0048] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalent features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A continuous dewatering machine for dyeing and printing chemical fiber fabrics, characterized in that, include: A dehydration tank (100) has a circular cavity inside and inlets and outlets (106) connected on both sides; The dehydration assembly includes auxiliary dehydration assemblies that are centrally symmetrically distributed on the upper and lower sides of the inlet and outlet (106) and a main dehydration assembly located in the middle of the dehydration tank (100); A drain pipe (107) is fixedly installed at the bottom of the dehydration tank (100) so that the liquid accumulated inside the dehydration tank (100) can be discharged from the drain pipe (107).

2. The continuous dewatering machine for dyeing and printing chemical fiber fabrics according to claim 1, characterized in that, The auxiliary dehydration component includes: Cold pressing plate (101) and hot pressing plate (102) are arranged symmetrically on the top and bottom of the inner walls on both sides of the dehydration tank (100); Multiple pressure rollers (104) are movably fitted onto the side of the cold pressure plate (101) and the hot pressure plate (102) facing the inner wall of the dehydration tank (100), so that the fabric is conveyed along the side of the cold pressure plate (101) and the hot pressure plate (102) facing the inner wall of the dehydration tank (100).

3. The continuous dewatering machine for dyeing and printing chemical fiber fabrics according to claim 2, characterized in that, An elastic telescopic roller frame (103) is fixed between the pressure roller (104) and the inner wall of the dehydration tank (100). The elastic telescopic roller frame (103) provides a thrust to the pressure roller (104) that gradually increases from top to bottom. The opposite ends of the cold pressing plate (101) and the hot pressing plate (102) are rotatably connected to fixed pulleys (105).

4. A continuous dewatering machine for dyeing and printing chemical fiber fabrics according to claim 1, characterized in that, The main dehydration component includes: Two dewatering rollers (108) are arranged in parallel and spaced apart in the middle of the inner cavity of the dewatering box (100), so that the fabric passes between the two dewatering rollers (108) and is squeezed by the dewatering rollers (108) for dewatering; Two cone-shaped clamps (114) are arranged in an inverted V shape and positioned below the two dewatering rollers (108).

5. A continuous dewatering machine for dyeing and printing chemical fiber fabrics according to claim 4, characterized in that, The end of the conical clamp (114) away from the dewatering roller (108) is round and rotatably connected to the inner wall of the dewatering box (100). A torsion spring (115) is fixed between the bottom of the conical clamp (114) and the inner wall of the dewatering box (100).

6. A continuous dewatering machine for dyeing and printing chemical fiber fabrics according to claim 4, characterized in that, Both of the dewatering rollers (108) have a wiping mechanism on their outer walls, the wiping mechanism comprising: Wiping element, which is movably attached to the outer wall of the dewatering roller (108), so that the wiping element removes moisture from the outer wall of the dewatering roller (108) by contacting the outer wall of the dewatering roller (108); An electric push rod (116) is fixedly disposed on the side of the wiping member away from the dehydration roller (108). The electric push rod (116) is used to drive the wiping member to move towards the outer wall of the dehydration roller (108).

7. A continuous dewatering machine for dyeing and printing chemical fiber fabrics according to claim 6, characterized in that, An elastic spring (119) is fixedly connected to the telescopic end of the electric push rod (116). A connecting tube (117) is slidably sleeved on the outer wall of the elastic spring (119). A telescopic rod (118) is movably sleeved on the outer wall of the elastic spring (119) and fixedly connected between the connecting tube (117) and the electric push rod (116). The side of the connecting tube (117) away from the electric push rod (116) is fixed to the wiping component.

8. A continuous dewatering machine for dyeing and printing chemical fiber fabrics according to claim 6, characterized in that, The wiping device includes: An incomplete cylindrical cover (109) is provided, with bearing sliders (110) rotatably connected to both ends of the incomplete cylindrical cover (109). The bearing sliders (110) are slidably connected to the inner wall of the dehydration tank (100). A water outlet pipe (113) is fixedly connected to the bottom of the incomplete cylindrical cover (109). A water-absorbing cotton roller (111) is rotatably connected to the inside of an incomplete cylindrical cover (109). The sidewall of the water-absorbing cotton roller (111) protrudes from the outside of the incomplete cylindrical cover (109) and is movably attached to the outer wall of the dewatering roller (108). A scraper (112) is fixedly connected to the bottom of the incomplete cylindrical cover (109) near the dewatering roller (108).

9. A continuous dewatering machine for dyeing and printing chemical fiber fabrics according to claim 1, characterized in that, The outer wall of the dehydration tank (100) is fixedly connected to a hollow cover (120) that communicates with the inlet and outlet (106). Two cylindrical rods (121) are rotatably connected at intervals inside the hollow cover (120).

10. A continuous dewatering machine for dyeing and printing chemical fiber fabrics according to claim 9, characterized in that, A rectangular groove (122) is provided on one side of the hollow cover (120), and a rectangular through groove (124) is provided on the other side of the hollow cover (120). A sliding seat (128) is slidably connected in both the rectangular groove (122) and the rectangular through groove (124). The cylindrical rod (121) is rotatably connected to the sliding seat (128). A return spring (123) is fixedly connected between the sliding seat (128) and the inner wall of the rectangular groove (122). One end of the cylindrical rod (121) extends to the end of the rectangular through groove (124) and is fitted with an arc-shaped inclined tube (125). The arc-shaped inclined tube (125) is fixedly connected to the inner wall of the rectangular through groove (124). A connecting plate (126) is fixedly connected to one end of the cylindrical rod (121) near the arc-shaped inclined tube (125). A driven protrusion (127) is fixedly connected to the end of the connecting plate (126) near the arc-shaped inclined tube (125).

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