High-performance composite hose winding and measuring integrated device for ocean engineering

Abstract

The invention relates to the technical field of hose winding, in particular to an ocean engineering high-performance composite hose winding and measuring integrated device which comprises a base, a winding mechanism mounted on the base, a measuring mechanism mounted on the winding mechanism, a connecting mechanism mounted on the winding mechanism and a clamping mechanism mounted on the winding mechanism. A protection mechanism is mounted on the winding mechanism; through cooperation of the winding mechanism and the clamping mechanism, winding storage of the hose is facilitated, the hose can be conveniently moved to a designated position to be released and laid, meanwhile, follow-up disassembly and maintenance are facilitated, through installation of the measuring mechanism, the measuring mechanism is driven to record the length when the hose is released or wound, operation is convenient and fast, and efficiency is improved; the hose is fixed during winding, the slipping effect is achieved, the hose is prevented from slipping after being released, the protection mechanism is installed, abutting protection is achieved during winding of the winding mechanism, and the motor is prevented from being damaged due to the fact that the motor is in a load state for a long time.

Description

Technical Field

[0001] The present invention relates to the technical field of hose retraction, and specifically relates to a high-performance composite hose retraction and measurement integrated device for ocean engineering. Background Art

[0002] Due to the special environment of high salinity in the ocean and marine microorganisms generated in the high-salinity environment, engineering materials serving in the ocean have relatively high requirements for corrosion resistance. Polyurethane materials have a wide range of applications in many industrial fields, including ocean engineering, navigation, ocean resource development, etc. When producing high-performance composite hoses used in ocean engineering, a retraction device is required for retraction to facilitate subsequent transportation and laying.

[0003] However, traditional retraction devices lack a length measurement component when retracting hoses, resulting in the length of the retracted hoses not being easily and real-timely recorded, reducing efficiency. Moreover, there is a lack of a good guiding component during retraction, leading to friction and damage between the hoses and other devices during retraction. In addition, the retraction device lacks a one-way limiting component during retraction, and there will be a certain reverse pulling force during hose retraction, causing the motor to be in a long-term load state. After retraction, the motor needs to be braked and locked for a long time, resulting in motor heating and affecting its lifespan. And when the motor is damaged, it is easy to cause the retraction disc to loosen and the hose to be released. At the same time, when retracting the hose, there is a lack of a fixing component, resulting in the hose slipping easily during retraction, causing the retracted hose to be loose and not tight. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention provides a high-performance composite hose retraction and measurement integrated device for ocean engineering.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a high-performance composite hose retraction and measurement integrated device for ocean engineering, including a base, a retraction mechanism is installed on the base, a measurement mechanism is installed on the retraction mechanism, a connection mechanism is installed on the retraction mechanism, a clamping mechanism is installed on the retraction mechanism, and a protection mechanism is installed on the retraction mechanism.

[0006] Specifically, the retraction mechanism includes a support frame. The two sides of the top of the base are respectively vertically connected with a support frame. A fixed shaft is installed between the tops of the two support frames, and a retraction disc is rotatably connected to the fixed shaft.

[0007] Specifically, a driving motor is detachably connected to the outside of the top of one of the support frames. One end side wall of the retraction disc is detachably connected with a control gear. The output shaft of the driving motor is installed with a driving gear, and the driving gear meshes with the control gear. The diameter of the driving gear is smaller than the diameter of the control gear.

[0008] Specifically, the support frame is of a triangular structure, and a support rod and a controller are respectively installed on the two support frames. The support rod is of a "T" - shaped structure.

[0009] Specifically, two rollers are respectively rotatably connected to both ends of the base, and connection buckles are respectively installed at the centers of both ends of the base.

[0010] Specifically, the measuring mechanism includes a swing rod. Both ends of the fixed shaft extend to the outside of the support frame. Swing rods are respectively rotatably connected to both ends of the fixed shaft. Connection blocks are respectively rotatably connected to the opposite sides of the bottoms of the two swing rods. Two parallel guide rollers are rotatably connected between the two connection blocks. Rotary encoders are respectively snap - connected to the tops of the two connection blocks.

[0011] Specifically, positioning blocks are respectively installed on the opposite sides of the tops of the two swing rods. The positioning blocks are made of cylindrical rubber material and are in contact with the support frame.

[0012] Specifically, the connection mechanism includes a slot. Slots are respectively provided at both ends of the winding reel. Symmetric slide rods are respectively installed inside both ends of the winding reel. The slide rods are slidably connected to the inside of the winding reel through abutment springs. Clamping plates are provided inside the two slots. One end of the slide rod extends into the slot and is fixedly connected to the clamping plate. The clamping plate is slidably connected to the inside of the slot through the slide rod. The clamping plate is made of arc - shaped rubber material.

[0013] Specifically, the clamping mechanism includes a pressing block. Pressing blocks are respectively snap - connected to the tops of the two support frames. Clamping plates are respectively vertically connected to both ends of the bottom of the pressing block. The two clamping plates are snap - connected to the top of the support frame through clamping grooves. Two bolts are threadedly connected to the outside of the top of the support frame. One end of each of the two bolts extends into the clamping groove and abuts against the clamping plate. The bottom of the pressing block abuts against the side wall of the fixed shaft. The outer side walls of both ends of the fixed shaft are snap - connected through the pressing block and the fixed grooves on the opposite sides of the support frame.

[0014] Specifically, the protection mechanism includes a helical gear disk. A helical gear disk is detachably connected to the side wall of the other end of the winding reel. A limiting rod is slidably connected to the mid - line inside the other support rod. The limiting rod is of an "f" - shaped structure. A return spring is connected between the outer side of the top of the limiting rod and the top of the support rod. One end of the top of the limiting rod abuts against the side wall of the helical gear disk. A pressing plate is installed at the bottom of the limiting rod. The pressing plate is slidably connected to the outside of the support rod.

[0015] The beneficial effects of the present invention are as follows:

[0016] (1) For the high - performance composite hose winding and measuring integrated device for ocean engineering of the present invention, through the cooperation of the winding mechanism and the clamping mechanism, it is beneficial to wind and store the hose. And during use, it is convenient to move to a designated position by a trailer for releasing and laying, and at the same time, it is convenient for subsequent disassembly, assembly and maintenance.

[0017] (2) The integrated device for winding and measuring a high-performance composite hose for ocean engineering according to the present invention drives the measuring mechanism to work when the hose is released or wound through the installation of the measuring mechanism, thereby recording the lengths during release and winding, and the operation is convenient and the efficiency is improved.

[0018] (3) The integrated device for winding and measuring a high-performance composite hose for ocean engineering according to the present invention is beneficial to fixing the hose during winding through the installation of the connecting mechanism, plays a role in preventing slipping, and prevents the hose from slipping off after release.

[0019] (4) The integrated device for winding and measuring a high-performance composite hose for ocean engineering according to the present invention is beneficial to resisting and protecting the winding mechanism during winding through the installation of the protection mechanism, and prevents the motor from being damaged due to being in a load state for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the overall structure provided by the present invention;

[0022] Figure 2 It is a schematic diagram of the connection structure between the helical gear disk and the winding disk of the present invention;

[0023] Figure 3 It is a schematic diagram of the connection structure between the control gear and the winding disk of the present invention;

[0024] Figure 4 It is a schematic diagram of the connection structure between the roller and the base of the present invention;

[0025] Figure 5 It is an exploded schematic diagram of the structure between the pressing block and the support frame of the present invention;

[0026] Figure 6 It is a schematic diagram of the connection structure between the limiting rod and the helical gear disk of the present invention;

[0027] Figure 7 It is a schematic diagram of the connection structure between the swing rod and the connecting block of the present invention;

[0028] Figure 8 It is a schematic diagram of the connection structure between the guide roller and the connecting block of the present invention;

[0029] Figure 9 It is a schematic diagram of the connection structure between the clamping plate and the sliding rod of the present invention.

[0030] In the figure: 1. Base; 2. Retracting mechanism; 201. Support frame; 202. Support rod; 203. Driving motor; 204. Retracting disc; 205. Roller; 206. Connecting buckle; 207. Driving gear; 208. Control gear; 209. Fixed shaft; 3. Measuring mechanism; 301. Swing rod; 302. Guide roller; 303. Connecting block; 304. Positioning block; 305. Revolution sensor; 4. Connecting mechanism; 401. Slot; 402. Clamping plate; 403. Resisting spring; 404. Slide bar; 5. Engaging mechanism; 501. Pressing block; 502. Card plate; 503. Card slot; 504. Fixed slot; 505. Bolt; 6. Protection mechanism; 601. Helical gear disc; 602. Pressing plate; 603. Limiting rod; 604. Return spring; 7. Controller. Detailed implementation manners

[0031] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0032] As Figure 1 , Figure 3 , Figure 5 , Figure 6 , Figure 7 and Figure 9 shown, a high-performance composite hose retracting and measuring integrated device for ocean engineering according to the present invention includes a base 1, a retracting mechanism 2 is installed on the base 1, a measuring mechanism 3 is installed on the retracting mechanism 2, a connecting mechanism 4 is installed on the retracting mechanism 2, an engaging mechanism 5 is installed on the retracting mechanism 2, and a protection mechanism 6 is installed on the retracting mechanism 2.

[0033] Specifically, as Figure 1 , Figure 2 and Figure 3 shown, the retracting mechanism 2 includes a support frame 201, support frames 201 are vertically connected to both sides of the top of the base 1 respectively, a fixed shaft 209 is installed between the tops of the two support frames 201, and a retracting disc 204 is rotatably connected to the fixed shaft 209. Through the installation of the two support frames 201, it is beneficial to support and connect the fixed shaft 209, so as to realize the rotational installation of the retracting disc 204, which is beneficial to the retracting and storage of the hose and the release and laying after retraction.

[0034] Specifically, as Figure 1 and Figure 3As shown, a drive motor 203 is detachably connected to the outer side of the top of one of the support frames 201. One end side wall of the winding reel 204 is detachably connected to a control gear 208. The output shaft of the drive motor 203 is equipped with a drive gear 207. The drive gear 207 meshes with the control gear 208. The diameter of the drive gear 207 is smaller than that of the control gear 208. Through the installation of the drive motor 203, it is beneficial to connect the drive gear 207. Through the installation of the control gear 208, the drive motor 203 drives the drive gear 207 to rotate the control gear 208, thereby realizing the rotation of the winding reel 204 on the fixed shaft 209, which is beneficial to the hose winding work.

[0035] Specifically, as Figure 1 and Figure 2 shown, the support frame 201 is of a triangular structure. A support rod 202 and a controller 7 are respectively installed on the two support frames 201. The support rod 202 is of a "T" - shaped structure, which is beneficial to the stable support of the support frame 201 for the winding reel 204. And through the installation of the support rod 202, the support frame 201 is made more firm and will not deform.

[0036] Specifically, as Figure 1 and Figure 4 shown, two rollers 205 are respectively rotatably connected to both ends of the base 1. Connection buckles 206 are respectively installed at the centers of both ends of the base 1, which is beneficial for the base 1 to be moved and carried. And through the installation of the connection buckles 206, it is beneficial to drag the base 1 by a connecting rope.

[0037] Specifically, as Figure 1 、 Figure 2 、 Figure 7 and Figure 8 shown, the measuring mechanism 3 includes a swing rod 301. Both ends of the fixed shaft 209 extend to the outside of the support frame 201. Swing rods 301 are respectively rotatably connected to both ends of the fixed shaft 209. Connecting blocks 303 are respectively rotatably connected to the opposite sides of the bottoms of the two swing rods 301. Two parallel guide rollers 302 are rotatably connected between the two connecting blocks 303. Rotation sensors 305 are respectively snap - connected to the tops of the two connecting blocks 303. Through the rotational connection of the two swing rods 301, it is beneficial to install the two connecting blocks 303. Through the installation of the connecting blocks 303, it is beneficial to connect the two parallel guide rollers 302. Through the cooperation of the two guide rollers 302, the hose is guided after being inserted. Through the installation of the rotation sensors 305, it is beneficial to calculate the number of rotations of the guide rollers 302, thereby calculating the length of the hose movement, and further realizing the recording of the winding length of the hose during winding.

[0038] Specifically, as Figure 7As shown, positioning blocks 304 are respectively installed on the opposite sides of the tops of the two swing rods 301. The positioning blocks 304 are made of cylindrical rubber material. The positioning blocks 304 are in contact with the support frame 201. By installing the positioning blocks 304, it is beneficial to position the swing rods 301 and prevent the swing amplitude of the swing rods 301 from being too large and affecting the hose winding.

[0039] Specifically, as Figure 3 and Figure 9 shown, the connecting mechanism 4 includes a slot 401. Slots 401 are respectively provided at both ends of the winding disc 204. Symmetrical sliding rods 404 are respectively installed on the inner sides of both ends of the winding disc 204. The sliding rods 404 are slidably connected to the inside of the winding disc 204 through a resisting spring 403. Clamping plates 402 are provided inside the two slots 401. One end of the sliding rod 404 extends into the slot 401 and is fixedly connected to the clamping plate 402. The clamping plate 402 is slidably connected to the inside of the slot 401 through the sliding rod 404. The clamping plate 402 is made of arc-shaped rubber material. By opening the slot 401, it is beneficial to insert one end of the hose. And under the drive of the resisting spring 403, the clamping plate 402 clamps the hose inside the slot 401 stably and will not loosen. Furthermore, when the winding disc 204 rotates, the hose is wound. The clamping plate 402 is made of arc-shaped rubber material, which is beneficial to clamping the hose stably and plays an anti-slip role.

[0040] Specifically, as Figure 4 and Figure 5 shown, the engaging mechanism 5 includes a pressing block 501. Pressing blocks 501 are respectively engaged and connected to the tops of the two support frames 201. Two vertical connecting plates 502 are respectively connected to the two ends of the bottom of the pressing block 501. The two connecting plates 502 are engaged with the top of the support frame 201 through a clamping groove 503. Two bolts 505 are threadedly connected to the outside of the top of the support frame 201. One end of the two bolts 505 extends into the clamping groove 503 and is in contact with the connecting plate 502. The bottom of the pressing block 501 is in contact with the side wall of the fixed shaft 209. The outer side walls of both ends of the fixed shaft 209 are engaged through the fixed groove 504 on the opposite sides of the pressing block 501 and the support frame 201. By engaging the pressing block 501 with the top of the support frame 201, it is beneficial to contact the side wall of the fixed shaft 209. By inserting the connecting plate 502 into the clamping groove 503 and under the fastening of the bolt 505, the pressing block 501 is limited, so that the pressing block 501 contacts the fixed shaft 209 tightly. By removing the bolt 505, the pressing block 501 is separated from the support frame 201, which is convenient for disassembling the fixed shaft 209 and realizing the disassembly and replacement of the winding disc 204.

[0041] Specifically, as Figure 2 and Figure 6As shown, the protection mechanism 6 includes a helical gear disk 601. The other end side wall of the winding disk 204 is detachably connected to the helical gear disk 601. A limiting rod 603 is slidably connected to the middle line inside another support rod 202. The limiting rod 603 is in an "f" shape structure. A return spring 604 is connected between the outer side of the top of the limiting rod 603 and the top of the support rod 202. One end of the top of the limiting rod 603 abuts against the side wall of the helical gear disk 601. A pressing plate 602 is installed at the bottom of the limiting rod 603. The pressing plate 602 is slidably connected to the outside of the support rod 202. Through the installation of the helical gear disk 601, under the abutment of the return spring 604, the top of the limiting rod 603 abuts against the tooth groove of the helical gear disk 601, and the helical gear disk 601 cannot rotate, so that the winding disk 204 will not release, which is beneficial to the driving motor 203 not being in a load or brake state for a long time. Since the teeth of the helical gear disk 601 are in a right triangle structure, when the winding disk 204 rotates and winds, the helical gear disk 601 abuts against the limiting rod 603 and slides down to get rid of the elastic force of the return spring 604, so as to realize that the helical gear disk 601 can rotate unidirectionally and will not affect the winding work of the winding disk 204. By stepping on the pressing plate 602, the pressing plate 602 drives the limiting rod 603 to separate from the helical gear disk 601, so as to realize the reverse release work of the winding disk 204.

[0042] When the present invention is in use, firstly, the two support frames 201 are mounted on the base 1, and then, the pressure block 501 is engaged with the top of the support frame 201, which is conducive to the contact with the side wall of the fixed shaft 209, and the clamping plate 502 is inserted into the inside of the clamping groove 503. Under the tightening of the bolt 505, the pressure block 501 is limited, so that the pressure block 501 is tightly in contact with the fixed shaft 209. By removing the bolt 505, the pressure block 501 is separated from the support frame 201, which is convenient for disassembly of the fixed shaft 209 and the disassembly and replacement of the winding disk 204. After the fixed shaft 209 and the support frame 201 are stably installed, the winding disk 204 is rotatably connected, which is convenient for winding and storing the hose and releasing and laying it after winding. The driving motor 203 drives the driving gear 2 07 connection, the driving motor 203 drives the driving gear 207 to rotate the control gear 208, thereby realizing the rotation of the winding disk 204 on the fixed shaft 209, which is beneficial to the hose winding work. Through the installation of the support rod 202, the support frame 201 is more solid and will not be deformed. A plurality of rollers 205 are installed on the base 1, which is beneficial to the connection of the pull rope to drag and move the base 1. Through the rotation connection of the two swing rods 301, it is beneficial to install the two connecting blocks 303. Through the installation of the connecting block 303, it is beneficial to connect the two parallel guide rollers 302. Through the cooperation of the two guide rollers 302, the hose is guided after it is inserted. When the hose is wound and moved, the two guide rollers 302 are driven to rotate. Through the installation of the circle number sensor 305 , which is conducive to recording the number of revolutions of the end of the guide roller 302, and transmitting the data to the controller 7 through the revolution sensor 305. The controller 7 calculates the length of the hose reeling by the length of one revolution of the guide roller 302, and displays and stores it on the controller 7. The installation of the positioning block 304 is conducive to positioning the swing rod 301 to prevent the swing rod 301 from swinging too much and affecting the hose reeling. The opening of the slot 401 is conducive to inserting one end of the hose, and under the drive of the resistance spring 403, the clamping plate 402 can stably clamp the hose inside the slot 401 and will not loosen, so that the hose can be reeled when the reel 204 rotates. The clamping plate 402 is made of arc-shaped rubber material, which is conducive to stably clamping the hose and plays an anti-slip role. By installing the bevel gear plate 601, under the resistance of the return spring 604, the top of the limit rod 603 resists against the tooth groove of the bevel gear plate 601, and the bevel gear plate 601 cannot rotate, so that the winding disk 204 will not be released, which is beneficial for the drive motor 203 to not be in a load or brake state for a long time. Since the teeth of the bevel gear plate 601 are a right-angled triangle structure, when the winding disk 204 rotates to rewind, the bevel gear plate 601 resists the limit rod 603 to get rid of the elastic force of the return spring 604 and slide down, so that the bevel gear plate 601 can rotate in one direction without affecting the winding work of the winding disk 204. By stepping on the pressure plate 602, the pressure plate 602 drives the limit rod 603 to separate from the bevel gear plate 601, thereby realizing the reverse release of the winding disk 204.

[0043] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0044] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-performance composite hose reeling and measuring integrated device for marine engineering, characterized in that: The invention comprises a base (1), a reeling mechanism (2) being mounted on the base (1), a measuring mechanism (3) being mounted on the reeling mechanism (2), a connecting mechanism (4) being mounted on the reeling mechanism (2), a locking mechanism (5) being mounted on the reeling mechanism (2), and a protecting mechanism (6) being mounted on the reeling mechanism (2); The reeling mechanism (2) comprises a support frame (201), and the two sides of the top of the base (1) are respectively vertically connected to the support frames (201), and a fixed shaft (209) is installed between the tops of the two support frames (201), and a reeling disc (204) is rotatably connected to the fixed shaft (209); The measuring mechanism (3) comprises a swing rod (301), the two ends of the fixed shaft (209) extend to the outside of the support frame (201), the two ends of the fixed shaft (209) are respectively rotatably connected to the swing rod (301), the bottom opposite sides of the two swing rods (301) are respectively rotatably connected to connecting blocks (303), two parallel guide rollers (302) are rotatably connected between the two connecting blocks (303), and the tops of the two connecting blocks (303) are respectively engaged and connected to the number of turns sensors (305).

2. The high-performance composite hose reeling and measuring integrated device for marine engineering according to claim 1, characterized in that: A driving motor (203) is detachably connected to the outer side of the top of one of the support frames (201); a control gear (208) is detachably connected to the side wall of one end of the winding disk (204); a driving gear (207) is installed on the output shaft of the driving motor (203); the driving gear (207) is meshed with the control gear (208); and the diameter of the driving gear (207) is smaller than the diameter of the control gear (208).

3. The high-performance composite hose reeling and measuring integrated device for marine engineering according to claim 1, characterized in that: The support frame (201) is a triangular structure, and a support rod (202) and a controller (7) are respectively mounted on the two support frames (201), and the support rod (202) is a "T"-shaped structure.

4. The high-performance composite hose reeling and measuring integrated device for marine engineering according to claim 1, characterized in that: Two rollers (205) are rotatably connected to the two ends of the base (1), and connecting buckles (206) are respectively installed at the centers of the two ends of the base (1).

5. The high-performance composite hose reeling and measuring integrated device for marine engineering according to claim 1, characterized in that: Positioning blocks (304) are respectively installed on opposite sides of the tops of the two swing rods (301); the positioning blocks (304) are made of cylindrical rubber material, and the positioning blocks (304) are in contact with the support frame (201).

6. The high-performance composite hose reeling and measuring integrated device for marine engineering according to claim 1, characterized in that: The connecting mechanism (4) comprises a slot (401), and the two ends of the winding disk (204) are respectively provided with a slot (401), and the inner sides of the two ends of the winding disk (204) are respectively installed with symmetrical sliding rods (404), and the sliding rods (404) are slidably connected with the inside of the winding disk (204) through a resistance spring (403), and a clamping plate (402) is provided inside the two slots (401), and one end of the sliding rod (404) extends to the inside of the slot (401) and is fixedly connected with the clamping plate (402), and the clamping plate (402) is slidably connected with the inside of the slot (401) through the sliding rod (404), and the clamping plate (402) is made of arc-shaped rubber material.

7. The high-performance composite hose reeling and measuring integrated device for marine engineering according to claim 1, characterized in that: The locking mechanism (5) comprises a pressing block (501), the tops of the two support frames (201) are respectively locked with the pressing blocks (501), the two ends of the bottom of the pressing block (501) are respectively vertically connected with the clamping plates (502), the two clamping plates (502) are locked with the top of the support frame (201) through the clamping groove (503), the outer side of the top of the support frame (201) is threadedly connected with two bolts (505), one end of the two bolts (505) extends into the inside of the clamping groove (503) and contacts with the clamping plate (502), the bottom of the pressing block (501) contacts with the side wall of the fixed shaft (209), and the outer side walls of the two ends of the fixed shaft (209) are locked through the fixing grooves (504) on the opposite sides of the pressing block (501) and the support frame (201).

8. The high-performance composite hose reeling and measuring integrated device for marine engineering according to claim 3, characterized in that: The protection mechanism (6) comprises a beveled toothed disc (601), the side wall of the other end of the winding disc (204) is detachably connected with the beveled toothed disc (601), and a limiting rod (603) is slidably connected to the inner center line of the other support rod (202), and the limiting rod (603) is an "f"-shaped structure. A return spring (604) is connected between the outer side of the top of the limiting rod (603) and the top of the support rod (202), and one end of the top of the limiting rod (603) contacts the side wall of the beveled toothed disc (601), and a pressure plate (602) is installed at the bottom of the limiting rod (603), and the pressure plate (602) is slidably connected to the outer side of the support rod (202).

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