Hot galvanizing furnace for hot galvanizing processing

Abstract

The utility model belongs to the technical field of hot galvanizing furnaces, and discloses a hot galvanizing furnace for hot galvanizing processing, which comprises a zinc furnace main body, a top cover is arranged on the upper surface of the zinc furnace main body, a groove is arranged on the upper surface of the top cover, a stirring mechanism is rotatably connected in the groove of the top cover, and the stirring mechanism comprises a stirring rod. The stirring rod is rotationally connected into the groove of the top cover, a cross-shaped groove is formed in the upper surface of the stirring rod, a clamping groove is formed in the upper surface of the zinc furnace main body, and a driving mechanism for driving the stirring mechanism to rotate is slidably connected into the clamping groove of the zinc furnace main body and is arranged at the outer end of the zinc furnace main body through the driving mechanism; the driving mechanism can be replaced and maintained in time when damaged, and then the driving mechanism is slidably connected into the clamping groove of the zinc furnace body, so that follow-up workers can quickly assemble and disassemble the driving mechanism, and the time and the labor amount consumed by the workers during later operation and maintenance of the driving mechanism are reduced; therefore, the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hot-dip galvanizing furnaces, in particular to a hot-dip galvanizing furnace for hot-dip galvanizing processing. Background Art

[0002] The hot-dip galvanizing process has incomparable advantages in the protective properties of the combination of the physical barrier and electrochemical protection of the coating, the bonding strength between the coating and the substrate, the density, durability, maintenance-freeness and economy of the coating, and its adaptability to the shape and size of the product. It is widely used in the fields of automobiles, construction, home appliances, chemicals, machinery, petroleum, metallurgy, light industry, transportation, electric power, aviation and marine engineering. In the hot-dip galvanizing process, hot-dip galvanizing furnaces are often used.

[0003] For example, the utility model with announcement number CN216765023U discloses a hot-dip galvanizing furnace for hot-dip galvanizing, which relates to the field of hot-dip galvanizing, including a zinc pot for holding zinc liquid, a combustion port for heating the zinc pot is provided at the bottom of the zinc pot, and a boiler body, wherein the zinc pot is placed inside the boiler body, a support roller is fixedly connected to the inner bottom wall of the boiler body, the upper end of the support roller is rotatably connected to the zinc pot, a stirring rod is provided in the zinc pot, and a stirring assembly is connected to the zinc pot for stirring the zinc liquid by driving the zinc pot to rotate relative to the stirring rod. The present application has the effect of facilitating a more uniform temperature of the zinc liquid in the zinc pot.

[0004] In the process of realizing this application, it was found that the technology has the following problems: most of the existing hot-dip galvanizing furnaces used for hot-dip galvanizing processing stir the zinc liquid through a stirring component to achieve a more uniform temperature of the zinc liquid in the zinc pot, but most of the stirring components are arranged inside the hot-dip galvanizing furnace, making it difficult to replace the subsequent stirring components when damaged, thereby reducing the practicality of the equipment.

[0005] For this reason, a hot-dip galvanizing furnace for hot-dip galvanizing processing is proposed. Utility Model Content

[0006] The utility model aims to solve the problem that most stirring components are arranged inside a hot-dip galvanizing furnace, making it difficult to replace subsequent stirring components when damaged. The utility model provides a hot-dip galvanizing furnace for hot-dip galvanizing processing.

[0007] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0008] A hot-dip galvanizing furnace for hot-dip galvanizing processing comprises a zinc furnace main body, a top cover is installed on the upper surface of the zinc furnace main body, a groove is provided on the upper surface of the top cover, a stirring mechanism is rotatably connected inside the groove of the top cover, the stirring mechanism comprises a stirring rod, the stirring rod is rotatably connected inside the groove of the top cover, a cross-shaped groove is provided on the upper surface of the stirring rod, a card slot is provided on the upper surface of the zinc furnace main body, a driving mechanism for driving the stirring mechanism to rotate is slidably connected inside the card slot of the zinc furnace main body, a protective mechanism is installed on the upper surface of the driving mechanism, heat dissipation mechanisms are provided on the left and right sides of the protective mechanism, and two sets of positioning mechanisms are installed on the upper surface of the zinc furnace main body.

[0009] Furthermore, the driving mechanism includes a fixed plate, which is slidably connected to the inside of the card slot of the zinc furnace body, an L-shaped fixed plate and a motor are installed on the upper surface of the fixed plate, a gear 1 is installed on the outer surface of the output shaft of the motor, a groove is opened on the top of the inner wall of the L-shaped fixed plate, a rotating rod is rotatably connected inside the groove of the L-shaped fixed plate, an electric telescopic rod is installed on the lower surface of the rotating rod, the external teeth of the gear 1 are meshed and connected with the gear 2, the gear 2 is installed on the outer surface of the rotating rod, and a cross-shaped block is installed on the output end of the electric telescopic rod, and the position of the cross-shaped block is located at the upper end of the cross-shaped groove of the stirring rod.

[0010] Furthermore, the two groups of positioning mechanisms include fixed blocks, which are installed on the upper surface of the zinc furnace body, and are symmetrically distributed on the left and right sides of the top cover. The upper surfaces of the two groups of fixed blocks are provided with grooves, and the interiors of the two groups of grooves are rotatably connected with rotating blocks. Positioning rods are installed on the adjacent sides of the two groups of rotating blocks, and arc-shaped limit blocks are provided on the adjacent sides of the two groups of positioning rods. The adjacent sides of the two groups of arc-shaped limit blocks are respectively abutted against the left and right sides of the stirring rod, and the side of the positioning rod close to the gear two abuts against the side of the zinc furnace body away from the fixed plate.

[0011] Furthermore, the protection mechanism includes a protection cover, which is installed on the upper surface of the fixed plate, and a groove is provided on the side of the protection cover away from the L-shaped fixed plate, a slider is slidably connected inside the groove of the protection cover, a sealing plate is installed on the side of the slider away from the protective cover, a limiting plate is installed on the side of the protection cover close to the sealing plate, the back side of the sealing plate abuts against the front side of the limiting plate, and the side of the sealing plate close to the gear 2 abuts against the side of the zinc furnace body away from the fixed plate.

[0012] Furthermore, the two groups of heat dissipation mechanisms include a U-shaped fixing plate, and the protective cover and the sealing plate are provided with a slot on the side away from the gear 2. The two groups of U-shaped fixing plates are respectively connected to the slots of the protective cover and the sealing plate, and filters are installed inside the two groups of U-shaped fixing plates.

[0013] Furthermore, a groove is provided on the front side of the limiting plate, and a magnetic block is installed inside the groove of the limiting plate.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1. The utility model arranges the driving mechanism at the outer end of the zinc furnace body, so that the driving mechanism can be replaced and maintained in time when it is damaged, and the driving mechanism is not easy to come into contact with high temperature during use. The driving mechanism is then slidably connected to the inside of the card slot of the zinc furnace body, so that subsequent staff can quickly install and disassemble the driving mechanism, thereby reducing the time and labor consumed by the staff in the later operation and maintenance of the driving mechanism, thereby improving the practicality of the device.

[0016] 2. The utility model rotates two sets of positioning rods to make the adjacent sides of the two sets of arc-shaped limit blocks abut against the left and right sides of the stirring rod respectively, so that the two sets of positioning mechanisms limit the rotation position of the stirring rod when it is idle, thereby minimizing the rotation of the stirring rod after the cross-shaped block is disassembled and moved, causing the staff to spend a longer time in the next installation of the drive mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the top surface structure of the utility model;

[0018] Figure 2 It is a side structural diagram of the protective mechanism of the utility model;

[0019] Figure 3 It is a side structural schematic diagram of the stirring mechanism of the utility model;

[0020] Figure 4 This utility model Figure 1 Enlarged view of point A in the middle.

[0021] 1. Zinc furnace body; 2. Driving mechanism; 201. Fixed plate; 202. L-shaped fixed plate; 203. Motor; 204. Gear 1; 205. Gear 2; 206. Rotating rod; 207. Electric telescopic rod; 208. Cross-shaped block; 3. Top cover; 4. Stirring mechanism; 401. Stirring rod; 5. Protective mechanism; 501. Protective cover; 502. Slider; 503. Sealing plate; 504. Limiting plate; 6. Magnetic block; 7. Heat dissipation mechanism; 701. U-shaped fixed plate; 702. Filter; 8. Positioning mechanism; 801. Fixed block; 802. Rotating block; 803. Positioning rod; 804. Arc-shaped limiting block. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0025] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] like Figures 1 to 4As shown, a hot-dip galvanizing furnace for hot-dip galvanizing processing includes a zinc furnace body 1, a top cover 3 is installed on the upper surface of the zinc furnace body 1, a groove is opened on the upper surface of the top cover 3, a stirring mechanism 4 is rotatably connected inside the groove of the top cover 3, the stirring mechanism 4 includes a stirring rod 401, the stirring rod 401 is rotatably connected inside the groove of the top cover 3, a cross-shaped groove is opened on the upper surface of the stirring rod 401, a card slot is opened on the upper surface of the zinc furnace body 1, a driving mechanism 2 for driving the stirring mechanism 4 to rotate is slidably connected inside the card slot of the zinc furnace body 1, a protective mechanism 5 is installed on the upper surface of the driving mechanism 2, and the protective mechanism 5 is provided with heat dissipation mechanisms 7 on both sides, and two sets of positioning mechanisms 8 are installed on the upper surface of the zinc furnace body 1; specifically, the driving mechanism 2 is arranged at the outer end of the zinc furnace body 1, so that the driving mechanism 2 can be replaced and maintained in time when it is damaged, and the driving mechanism 2 is not easy to come into contact with high temperature during use, and then the driving mechanism 2 is slidably connected to the inside of the card slot of the zinc furnace body 1, so that subsequent staff can quickly install and disassemble the driving mechanism 2, thereby reducing the time and labor consumed by the staff in the later operation and maintenance of the driving mechanism 2, thereby improving the practicability of the device.

[0027] At the same time, by starting the driving mechanism 2, the stirring mechanism 4 is driven to rotate, and then the stirring mechanism 4 is arranged inside the zinc furnace body 1, so that the stirring mechanism 4 stirs the zinc liquid inside the zinc furnace body 1, thereby improving the temperature uniformity of the zinc liquid inside the zinc furnace body 1 during the heating process.

[0028] like Figure 1 and Figure 3 As shown, the driving mechanism 2 includes a fixed plate 201, which is slidably connected to the inside of the card slot of the zinc furnace body 1, an L-shaped fixed plate 202 and a motor 203 are installed on the upper surface of the fixed plate 201, a gear 1 204 is installed on the outer surface of the output shaft of the motor 203, a groove is provided on the top of the inner wall of the L-shaped fixed plate 202, a rotating rod 206 is rotatably connected inside the groove of the L-shaped fixed plate 202, an electric telescopic rod 207 is installed on the lower surface of the rotating rod 206, the outer teeth of the gear 1 204 are meshed and connected with the gear 2 205, the gear 205 is installed on the outer surface of the rotating rod 206, and a cross-shaped block 208 is installed on the output end of the electric telescopic rod 207, and the position of the cross-shaped block 208 is located at the upper end of the cross-shaped groove of the stirring rod 401;

[0029] Specifically, when the zinc furnace body 1 heats the zinc liquid, the cross-shaped block 208 is pushed to move by starting the electric telescopic rod 207, and the cross-shaped block 208 is clamped in the cross-shaped groove of the stirring rod 401, and then the motor 203 is started to drive the gear 1 204 and the gear 2 205 to rotate, so that the gear 2 205 drives the cross-shaped block 208 and the stirring mechanism 4 to rotate synchronously during the rotation process, thereby completing the stirring of the zinc liquid inside the zinc furnace body 1, thereby improving the temperature uniformity of the zinc liquid inside the zinc furnace body 1 during the heating process. The drive mechanism 2 is arranged at the outer end of the zinc furnace body 1, so that the drive mechanism 2 can be replaced and maintained in time when damaged, and the drive mechanism 2 is not easy to contact with high temperature during use, and then the drive mechanism 2 is slidably connected to the inside of the card slot of the zinc furnace body 1, so that the subsequent staff can quickly install and disassemble the drive mechanism 2, thereby reducing the time and labor consumed by the staff in the later operation and maintenance of the drive mechanism 2, thereby improving the practicality of the device.

[0030] like Figure 1 and Figure 4 As shown, the two groups of positioning mechanisms 8 both include fixed blocks 801, and the two groups of fixed blocks 801 are both installed on the upper surface of the zinc furnace body 1. The positions of the two groups of fixed blocks 801 are symmetrically distributed on the left and right sides of the top cover 3. The upper surfaces of the two groups of fixed blocks 801 are provided with grooves, and the interiors of the two groups of grooves are rotatably connected with rotating blocks 802. The adjacent sides of the two groups of rotating blocks 802 are both installed with positioning rods 803, and the adjacent sides of the two groups of positioning rods 803 are both provided with arc-shaped limit blocks 804. The adjacent sides of the two groups of arc-shaped limit blocks 804 are respectively abutted against the left and right sides of the stirring rod 401, and the side of the positioning rod 803 close to the gear 2 205 abuts against the side of the zinc furnace body 1 away from the fixed plate 201.

[0031] Specifically, before the staff disconnects the stirring rod 401 and the cross-shaped block 208, by rotating the two sets of positioning rods 803, the adjacent sides of the two sets of arc-shaped limit blocks 804 are respectively abutted against the left and right sides of the stirring rod 401, so that the two sets of positioning mechanisms 8 limit the rotation position of the stirring rod 401 when it is idle, thereby minimizing the rotation of the stirring rod 401 after the cross-shaped block 208 is disassembled and moved, causing the staff to spend a longer time in the next installation of the drive mechanism 2.

[0032] like Figure 2As shown, the protection mechanism 5 includes a protection cover 501, which is mounted on the upper surface of the fixed plate 201, and a groove is provided on the side of the protection cover 501 away from the L-shaped fixed plate 202, and a slider 502 is slidably connected inside the groove of the protection cover 501, and a sealing plate 503 is installed on the side of the slider 502 away from the protection cover 501, and a limiting plate 504 is installed on the side of the protection cover 501 close to the sealing plate 503, and the back side of the sealing plate 503 abuts against the front side of the limiting plate 504, and the side of the sealing plate 503 close to the gear 2 205 abuts against the side of the zinc furnace body 1 away from the fixed plate 201;

[0033] Specifically, by pushing the sealing plate 503, the back side of the sealing plate 503 is abutted against the front side of the limiting plate 504, so that the protection mechanism 5 forms a set of rectangular covers during use, and then the protection mechanism 5 shields and protects the driving mechanism 2, thereby avoiding the driving mechanism 2 from contacting with debris during use as much as possible, thereby reducing the number of times the staff regularly cleans the driving mechanism 2; the protection mechanism 5 shields and protects the driving mechanism 2, thereby avoiding the staff from contacting with the internal equipment of the driving mechanism 2 during the start-up process of the driving mechanism 2 as much as possible, thereby improving the safety of the device during use;

[0034] At the same time, the side of the sealing plate 503 close to the fixed plate 201 is attached to the side of the zinc furnace body 1 away from the fixed plate 201, so that the sealing plate 503 limits the left and right movement of the fixed plate 201 inside the slot of the zinc furnace body 1, thereby avoiding the movement of the driving mechanism 2 during use as much as possible, thereby expanding the use effect of the protective mechanism 5.

[0035] like Figure 2 As shown, the two groups of heat dissipation mechanisms 7 both include a U-shaped fixing plate 701, and a slot is provided on the side of the protective cover 501 and the sealing plate 503 away from the gear 205. The two groups of U-shaped fixing plates 701 are respectively connected to the slots of the protective cover 501 and the sealing plate 503, and the two groups of U-shaped fixing plates 701 are installed with filter screens 702 inside; specifically, the positions of the two groups of filter screens 702 are respectively arranged on the left and right sides of the protective mechanism 5, so that the external air can enter the protective mechanism 5 along the two groups of filter screens 702. The inside of the mechanism 5 is used to prevent the motor 203 from being damaged due to excessive temperature when the protective mechanism 5 shields the driving mechanism 2; the two groups of U-shaped fixing plates 701 are clamped in the slots of the sealing plate 503 and the protective cover 501, so that the staff can remove the two groups of filter screens 702 from the inside of the slots of the sealing plate 503 and the protective cover 501 by pushing the two groups of U-shaped fixing plates 701, thereby facilitating the subsequent staff to clean or replace the two groups of filter screens 702.

[0036] like Figure 2As shown, a groove is provided on the front side of the limiting plate 504, and a magnetic block 6 is installed inside the groove of the limiting plate 504; specifically, by pushing the sealing plate 503, the back side of the sealing plate 503 is adsorbed to the front side of the magnetic block 6, so that the magnetic block 6 limits the position of the sealing plate 503 on one side of the protective cover 501, thereby avoiding the movement of the sealing plate 503 during use as much as possible, thereby improving the stability of the sealing plate 503 during use.

[0037] In summary: by starting the electric telescopic rod 207 to push the cross-shaped block 208 to move, the cross-shaped block 208 is clamped in the cross-shaped groove of the stirring rod 401, and then the motor 203 is started to drive the gear 1 204 and the gear 2 205 to rotate, so that the gear 2 205 drives the cross-shaped block 208 and the stirring mechanism 4 to rotate synchronously during the rotation process, thereby completing the stirring of the zinc liquid inside the zinc furnace body 1; by rotating the two sets of positioning rods 803, the adjacent sides of the two sets of arc-shaped limit blocks 804 are respectively abutted against the left and right sides of the stirring rod 401, so that the two sets of positioning mechanisms 8 limit the rotation position of the stirring rod 401 when it is idle, thereby minimizing the rotation of the stirring rod 401 after the cross-shaped block 208 is disassembled and moved.

[0038] At the same time, by pushing the sealing plate 503, the back side of the sealing plate 503 is abutted against the front side of the limiting plate 504, so that the protective mechanism 5 forms a group of rectangular covers during use, and then the protective mechanism 5 shields and protects the driving mechanism 2, thereby minimizing the contact between the driving mechanism 2 and debris during use; the two groups of filter nets 702 are respectively arranged on the left and right sides of the protective mechanism 5, so that external air can enter the interior of the protective mechanism 5 along the two groups of filter nets 702, thereby minimizing the temperature of the motor 203 being too high when the protective mechanism 5 shields and protects the driving mechanism 2, thereby minimizing the damage to the motor 203.

[0039] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A hot-dip galvanizing furnace for hot-dip galvanizing processing, comprising a zinc furnace body (1), characterized in that: A top cover (3) is installed on the upper surface of the zinc furnace body (1), a groove is provided on the upper surface of the top cover (3), a stirring mechanism (4) is rotatably connected inside the groove of the top cover (3), the stirring mechanism (4) comprises a stirring rod (401), the stirring rod (401) is rotatably connected inside the groove of the top cover (3), a cross-shaped groove is provided on the upper surface of the stirring rod (401), a card slot is provided on the upper surface of the zinc furnace body (1), a driving mechanism (2) for driving the stirring mechanism (4) to rotate is slidably connected inside the card slot of the zinc furnace body (1), a protective mechanism (5) is installed on the upper surface of the driving mechanism (2), heat dissipation mechanisms (7) are provided on the left and right sides of the protective mechanism (5), and two groups of positioning mechanisms (8) are installed on the upper surface of the zinc furnace body (1).

2. A hot dip galvanizing furnace for hot dip galvanizing according to claim 1, characterized in that: The driving mechanism (2) comprises a fixing plate (201), the fixing plate (201) being slidably connected to the inside of a slot of the zinc furnace body (1), an L-shaped fixing plate (202) and a motor (203) being mounted on the upper surface of the fixing plate (201), a gear 1 (204) being mounted on the outer surface of an output shaft of the motor (203), a groove being formed on the top of an inner wall of the L-shaped fixing plate (202), and a rotating gear being rotatably connected to the inside of the groove of the L-shaped fixing plate (202). A rotating rod (206), an electric telescopic rod (207) is installed on the lower surface of the rotating rod (206), the outer teeth of the gear 1 (204) are meshedly connected with the gear 2 (205), the gear 2 (205) is installed on the outer surface of the rotating rod (206), and a cross-shaped clamping block (208) is installed on the output end of the electric telescopic rod (207), and the position of the cross-shaped clamping block (208) is located at the upper end of the cross-shaped groove of the stirring rod (401).

3. A hot dip galvanizing furnace for hot dip galvanizing according to claim 2, characterized in that: The two groups of positioning mechanisms (8) both comprise fixed blocks (801), and the two groups of fixed blocks (801) are both mounted on the upper surface of the zinc furnace body (1). The positions of the two groups of fixed blocks (801) are symmetrically distributed on the left and right sides of the top cover (3). The upper surfaces of the two groups of fixed blocks (801) are both provided with grooves, and the interiors of the two groups of grooves are both rotatably connected with rotating blocks (802). The adjacent sides of the two groups of rotating blocks (802) are both provided with positioning rods (803), and the adjacent sides of the two groups of positioning rods (803) are both provided with arc-shaped limit blocks (804). The adjacent sides of the two groups of arc-shaped limit blocks (804) respectively abut against the left and right sides of the stirring rod (401), and the side of the positioning rod (803) close to the gear 2 (205) abuts against the side of the zinc furnace body (1) away from the fixed plate (201).

4. A hot dip galvanizing furnace for hot dip galvanizing according to claim 2, characterized in that: The protection mechanism (5) comprises a protection cover (501), wherein the protection cover (501) is mounted on the upper surface of the fixing plate (201), a groove is provided on the side of the protection cover (501) away from the L-shaped fixing plate (202), a slider (502) is slidably connected inside the groove of the protection cover (501), a sealing plate (503) is mounted on the side of the slider (502) away from the protection cover (501), a limiting plate (504) is mounted on the side of the protection cover (501) close to the sealing plate (503), the back side of the sealing plate (503) abuts against the front side of the limiting plate (504), and the side of the sealing plate (503) close to the gear 2 (205) abuts against the side of the zinc furnace body (1) away from the fixing plate (201).

5. A hot dip galvanizing furnace for hot dip galvanizing according to claim 4, characterized in that: The two groups of heat dissipation mechanisms (7) both include a U-shaped fixing plate (701), and a slot is provided on the side of the protective cover (501) and the sealing plate (503) away from the second gear (205). The two groups of U-shaped fixing plates (701) are respectively connected to the inside of the slots of the protective cover (501) and the sealing plate (503), and a filter screen (702) is installed inside the two groups of U-shaped fixing plates (701).

6. A hot dip galvanizing furnace for hot dip galvanizing according to claim 4, characterized in that: The front side of the limiting plate (504) is provided with a groove, and a magnetic block (6) is installed inside the groove of the limiting plate (504).

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