A steel gate

Abstract

The application belongs to the technical field of water conservancy gate, and particularly relates to a steel gate, which comprises a hoist, a gate frame, a gate plate and a sealing mechanism. The gate frame comprises an upper frame body and a lower frame body, and the upper frame body and the lower frame body are provided with a communicating sliding groove. The gate plate is slidably installed in the sliding groove. The sealing mechanism is arranged in the sliding groove and used for sealing the sliding groove and the gate plate. The gate plate is connected with the hoist through a gate lever and a winding rope. The application has the beneficial effect that the sealing mechanism is directly installed in the sliding groove, can directly act on the cooperation gap between the sliding groove and the gate plate, blocks the water leakage channel, and solves the problem of sealing failure of the cooperation surface of the existing steel gate caused by sliding.

Description

Technical Field

[0001] This application belongs to the technical field of water conservancy gates, and particularly relates to a steel gate. Background Art

[0002] In the field of water conservancy projects, steel gates are key movable structures for opening and closing the water inlets of partial hydraulic structures, and are widely used in scenarios such as irrigation, flood control, water supply, and hydropower stations. Their sealing performance and operating stability are directly related to the function and operating safety of hydraulic structures.

[0003] Currently, most steel gates on the market adopt a sliding opening and closing design. The main body of the gate realizes lifting or translation through sliding cooperation with the door frame or guide rail to control the opening and closing of the water inlet. To ensure initial sealing performance, such steel gates usually set sealing elements, such as rubber sealing strips, on the mating surfaces between the gate and the contact components to reduce water leakage. However, during long-term use, affected by the sliding characteristics, continuous frictional forces will be generated between the main body of the gate, the sealing elements, and the guide rail. As the usage time goes by, the sealing elements will gradually wear and age due to friction, and the mating surfaces may also have an increased gap due to repeated sliding, resulting in a significant deterioration of the sealing performance of the steel gate and different degrees of water leakage, so improvements are needed. Utility Model Content

[0004] The purpose of this application is to provide a steel gate that can solve the above problems.

[0005] The purpose of this application is to provide a steel gate, including: A hoist; A gate frame, including an upper frame body and a lower frame body, and there are connected chutes provided on the upper frame body and the lower frame body; A gate panel, which is slidably installed in the chute; A sealing mechanism, which is arranged in the chute and is used to seal the chute and the gate panel; Among them, the gate panel is connected to the hoist through a brake rod and a winding rope.

[0006] Adopting the above steel gate, the hoist connects the gate panel through the brake rod and the winding rope, and can stably drive the gate panel to slide in the connected chute of the upper frame body and the lower frame body of the gate frame, ensuring a smooth opening and closing process of the gate panel, and also providing a basic guarantee for sealing. The connected chute of the upper frame body and the lower frame body of the gate frame provides a path for the sliding of the gate panel; the sealing mechanism is directly installed in the chute and can directly act on the mating gap between the chute and the gate panel, blocking the water leakage channel and solving the problem of sealing failure of the mating surface caused by sliding of the existing steel gate.

[0007] Meanwhile, in the present application, the connection manner between the gate rod and the winding rope can reduce the additional friction during the sliding of the gate plate, lower the wear rate of the gate plate and the sealing mechanism, extend the effective sealing period of the sealing mechanism, and avoid the situation where the sealing performance of the existing steel gate decreases due to the rapid damage of the seal by long-term friction.

[0008] Furthermore, the sealing mechanism includes: A support member, including a U-shaped support portion and an installation portion located at one end of the support portion and extending outward; A seal, including a U-shaped contact portion disposed within the support portion and a protrusion portion disposed in the middle of the contact portion, where the gate plate contacts the protrusion portion and one end of the contact portion; A fixing member, in an L shape, with one right-angled side located between the other end of the contact portion and the protrusion portion, and the other right-angled side contacting the installation portion; Wherein, the fixing member and the installation portion are fixed to the outside of the chute by screws.

[0009] The U-shaped support portion of the support member can fit the chute to provide an installation carrier for the seal and a sliding space for the gate plate, ensuring that the seal can continuously maintain effective contact with the gate plate and avoiding the generation of a sealing gap due to unstable support resulting in the displacement of the seal; the outwardly extending installation portion provides an installation basis for the fixing member, facilitating the overall fixation of the sealing mechanism.

[0010] Meanwhile, the U-shaped contact portion of the seal contacts the gate plate to form a preliminary seal, and the protrusion portion in the middle further contacts the gate plate to form a double-sealing structure. Compared with the existing single sealing surface, it can greatly improve the sealing effect and reduce the risk of water leakage. In addition, one right-angled side of the L-shaped fixing member is installed between the other end of the contact portion and the protrusion portion, which can squeeze and fix the seal, preventing the seal from deforming or shifting during the sliding of the gate plate and ensuring the stable contact pressure between the seal and the gate plate; the other right-angled side contacts the installation portion and is fixed to the outside of the chute in cooperation with the screws, which can firmly fix the entire sealing mechanism on the chute, avoiding the loosening of the sealing mechanism due to water flow impact or the vibration of the gate plate sliding, and ensuring that the sealing structure is in a stable sealing state for a long time.

[0011] Furthermore: A plurality of sealing ribs are provided at both ends where the outer wall of the contact portion contacts the inner wall of the support portion.

[0012] By installing multiple sealing ribs at both ends where the outer wall of the contact part contacts the inner wall of the support part, the contact area between the contact part and the inner wall of the support part can be increased, thereby filling the tiny gaps between the two, forming multiple sealing barriers, effectively blocking the leakage path of water flow between the contact part and the inner wall of the support part, and avoiding the side leakage problem caused by the loose fit between the contact part and the support member. At the same time, the sealing ribs have a certain elasticity. When the gate panel slides and generates slight vibrations, the vibration energy can be absorbed through their own deformation, reducing the relative displacement between the contact part and the inner wall of the support part due to vibrations, maintaining the fitting stability of the two, and further ensuring the side sealing effect.

[0013] Furthermore, a sealing protrusion is provided at one end of the contact part that contacts the gate panel.

[0014] A sealing protrusion is provided at one end of the contact part that contacts the gate panel, increasing the pressure at the contact between the two, making the sealing protrusion fit more closely to the surface of the gate panel. Even if there are tiny irregularities on the surface of the gate panel, the sealing protrusion can fill these tiny depressions through its own elastic deformation, reducing the leakage gap caused by the uneven contact surface and improving the sealing accuracy.

[0015] Furthermore, the sealing protrusion includes a contact part in the middle and inclined parts on both sides of the contact part. After the inclined parts contact the gate panel, they are squeezed and expand towards both sides of the contact part.

[0016] The contact part in the middle of the sealing protrusion can form a main contact seal with the gate panel to ensure the basic sealing effect. After the inclined parts on both sides contact the gate panel, they are squeezed and expand towards both sides of the contact part. On the one hand, it can greatly increase the contact area between the sealing protrusion and the gate panel, extend the sealing range from the contact part to both sides, cover a wider sealing area, and reduce the possibility of water flow leakage from the sealing edge. On the other hand, the expansion deformation of the inclined parts can adapt to the slight position deviation during the sliding of the gate panel, avoid the separation of the sealing protrusion from the gate panel due to the tiny deviation of the gate panel, maintain the continuity of the seal, and avoid the problem of seal interruption caused by the deviation of the gate panel.

[0017] Furthermore, a sealing convex head is provided at one end of the protrusion part that contacts the gate panel. The diameter of the sealing convex head is larger than that of the protrusion part, and the sealing convex head also contacts the fixing part.

[0018] A sealing convex head is provided at one end of the protrusion part that contacts the gate panel, and the diameter of the sealing convex head is larger than that of the protrusion part, which can expand the contact area between the protrusion part and the gate panel, enhance the sealing pressure of the protrusion part on the gate panel, make the sealing convex head fit closely to the gate panel, and block the leakage path of water flow between the protrusion part and the gate panel. At the same time, the sealing convex head contacts the fixing part, which can form an additional sealing surface between the protrusion part and the fixing part, fill the gap between the two, and avoid the leakage of water flow from the mating part between the protrusion part and the fixing part, further improving the comprehensiveness of the seal.

[0019] Further, a circular mounting protrusion is provided at one end of the support portion, and a limiting protrusion extending inward is provided at the opening of the sliding groove. The limiting protrusion is adapted to the mounting protrusion.

[0020] The circular mounting protrusion at one end of the support portion is adapted to the limiting protrusion extending inward at the opening of the sliding groove, which can position the installation position of the support member in the sliding groove, ensure that the support member will not shift left and right after installation, and enable the seal on the support member to always be in direct contact with the gate panel, avoiding the seal gap caused by the misalignment of the seal and the gate panel due to the shift of the support member. At the same time, the limiting protrusion forms a limiting constraint on the mounting protrusion, which can prevent the support member from axially moving during the sliding of the gate panel or under the impact of water flow, maintaining the overall position stability of the support member, and further ensuring the stable cooperation relationship between the sealing mechanism and the gate panel, avoiding the destruction of the sealing performance of the sealing structure due to the displacement of the support member. In addition, the adaptation structure of the circular mounting protrusion and the limiting protrusion can reduce the installation gap between the support member and the sliding groove, reduce the possibility of water flow infiltrating from the installation gap, and further improve the overall sealing effect of the sealing mechanism.

[0021] The beneficial effects of this application are: 1. By directly installing the sealing mechanism in the sliding groove, it can directly act on the mating gap between the sliding groove and the gate panel, block the water leakage channel, and solve the problem of the sealing failure of the mating surface caused by the sliding of the existing steel gate; 2. The middle abutting portion of the sealing protrusion can form a main abutting seal with the gate panel to ensure the basic sealing effect. After the two inclined portions contact the gate panel, they are squeezed and expand to both sides of the abutting portion, which can greatly increase the contact area between the sealing protrusion and the gate panel, extend the sealing range from the abutting portion to both sides, cover a wider sealing area, and reduce the possibility of water flow leaking from the sealing edge; 3. By installing multiple sealing ribs at both ends where the outer wall of the contact portion contacts the inner wall of the support portion, the contact area between the contact portion and the inner wall of the support portion can be increased, thereby filling the tiny gap between the two, forming multiple sealing barriers, effectively blocking the leakage path of water flow between the contact portion and the inner wall of the support portion, and avoiding the side leakage problem caused by the non-tight fit between the contact portion and the support member. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the present utility model; Figure 2 is another schematic structural diagram of the present utility model; Figure 3 is a partial cross-sectional view of the gate frame, gate, and sealing structure of the present utility model; Figure 4 is Figure 3 the enlarged view of A in

[0023] The reference numerals in the figure are: 100, hoist; 110, gate rod; 120, winding rope; 200, gate frame; 210, upper frame body; 220, lower frame body; 230, sliding groove; 300, gate panel; 400, support member; 410, support portion; 420, installation portion; 430, installation protrusion; 440, limit protrusion; 500, seal; 510, contact portion; 520, protrusion portion; 521, sealing convex head; 530, sealing rib; 540, sealing protrusion; 541, abutting portion; 542, inclined portion; 600, fixing member; 610, screw. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0025] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used data may be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object may be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0026] Next, the steel gate provided by the embodiments of the present application will be described in detail in conjunction with the accompanying drawings through specific embodiments and their application scenarios.

[0027] Embodiment 1:

[0028] As Figures 1 to 3 shown, the embodiment of the present application provides a steel gate, including: A hoist 100; A gate frame 200, including an upper frame body 210 and a lower frame body 220, and a communicating sliding groove 230 is provided on the upper frame body 210 and the lower frame body 220; A gate panel 300, slidably installed in the sliding groove 230; A sealing mechanism, arranged in the sliding groove 230, for sealing the sliding groove 230 and the gate panel; Among them, the gate panel 300 is connected to the hoist 100 through a gate rod 110 and a winding rope 120.

[0029] In some embodiments of the present application, as Figure 1 shown, by using the above-mentioned steel gate, the hoist 100 is connected to the gate plate 300 through the gate rod 110 and the winding rope 120, which can stably drive the gate plate 300 to slide in the communication chute 230 of the upper frame 210 and the lower frame 220 of the gate frame 200, ensuring the smooth opening and closing process of the gate plate 300 and providing a basic guarantee for sealing. The communication chute 230 of the upper frame 210 and the lower frame 220 of the gate frame 200 provides a path for the sliding of the gate plate 300; the sealing mechanism is directly installed in the chute 230, which can directly act on the fitting gap between the chute 230 and the gate plate 300, blocking the water leakage channel and solving the problem of the sealing failure of the mating surface due to the sliding of the existing steel gate.

[0030] Meanwhile, in the present application, the connection manner between the gate rod 110 and the winding rope 120 can reduce the additional friction during the sliding of the gate plate 300, reduce the wear rate of the gate plate 300 and the sealing mechanism, extend the effective sealing period of the sealing mechanism, and avoid the situation that the sealing performance of the existing steel gate decreases due to the rapid damage of the seal 500 caused by long-term friction.

[0031] Embodiment 2:

[0032] The embodiment of the present application provides a steel gate. In addition to including the above technical features, the steel gate of the embodiment of the present application further includes the following technical features.

[0033] As Figure 3 [[ID=1⑥]]and Figure 4 shown, the sealing mechanism includes: A support member 400, including a U-shaped support portion 410 and an installation portion 420 extending outward at one end of the support portion 410; A seal 500, including a U-shaped contact portion 510 disposed in the support portion 410 and a protrusion portion 520 disposed in the middle of the contact portion 510, and the gate plate 300 contacts the protrusion portion 520 and one end of the contact portion 510; A fixing member 600, in an L shape, with one right-angled side located between the other end of the contact portion 510 and the protrusion portion 520, and the other right-angled side contacting the installation portion 420; Wherein, the fixing member 600 and the installation portion 420 are fixed outside the chute 230 by screws 610. ]1]

[0034] In the embodiment of the present application, the U-shaped support portion 410 of the support member 400 can fit the chute 230 to provide an installation carrier for the seal member 500 and a sliding space for the gate plate 300, ensuring that the seal member 500 can continuously maintain effective contact with the gate plate 300, and avoiding the generation of a sealing gap due to the displacement of the seal member 500 caused by unstable support; the outwardly extending installation portion 420 provides an installation basis for the fixing member 600, facilitating the overall fixation of the sealing mechanism.

[0035] Meanwhile, the U-shaped contact portion 510 of the seal member 500 contacts the gate plate 300 to form a preliminary seal, and the middle convex portion 520 further contacts the gate plate 300 to form a double-sealing structure. Compared with the existing single sealing surface, it can greatly improve the sealing effect and reduce the risk of water leakage. In addition, one right-angle side of the L-shaped fixing member 600 is installed between the other end of the contact portion 510 and the convex portion 520, which can squeeze and fix the seal member 500, preventing the seal member 500 from deforming or shifting during the sliding process of the gate plate 300, and ensuring the stability of the contact pressure between the seal member 500 and the gate plate 300; the other right-angle side contacts the installation portion 420 and is fixed to the outside of the chute 230 in cooperation with the screw 610, so as to firmly fix the whole sealing mechanism on the chute 230, avoiding the loosening of the sealing mechanism due to the impact of water flow or the vibration during the sliding of the gate plate 300, and ensuring that the sealing structure is in a stable sealing state for a long time.

[0036] Furthermore, a plurality of sealing ribs 530 are provided at both ends where the outer wall of the contact portion 510 contacts the inner wall of the support portion 410.

[0037] By installing a plurality of sealing ribs 530 at both ends where the outer wall of the contact portion 510 contacts the inner wall of the support portion 410, the contact area between the contact portion 510 and the inner wall of the support portion 410 can be increased, thereby filling the tiny gap between the two, forming multiple sealing barriers, effectively blocking the leakage path of water flow between the contact portion 510 and the inner wall of the support portion 410, and avoiding the side leakage problem caused by the non-tight fit between the contact portion 510 and the support member. At the same time, the sealing ribs 530 have a certain elasticity. When the gate plate 300 slides and generates slight vibrations, the vibration energy can be absorbed through its own deformation, reducing the relative displacement between the contact portion 510 and the inner wall of the support portion 410 caused by the vibration, maintaining the fitting stability of the two, and further ensuring the side sealing effect.

[0038] Embodiment 3:

[0039] The embodiment of the present application provides a steel gate. In addition to including the above technical features, the steel gate of the embodiment of the present application further includes the following technical features.

[0040] As Figure 3 and Figure 4 shown, a sealing protrusion 540 is further provided at one end where the contact portion 510 contacts the gate plate 300.

[0041] In an embodiment of the present application, a sealing protrusion 540 is provided at one end of the contact portion 510 in contact with the gate plate 300, increasing the pressure at the contact between the two, making the sealing protrusion 540 fit more closely to the surface of the gate plate 300. Even if there are slight irregularities on the surface of the gate plate 300, the sealing protrusion 540 can fill these slight depressions through its own elastic deformation, reducing the leakage gap caused by the uneven contact surface and improving the sealing accuracy.

[0042] Furthermore, the sealing protrusion 540 includes an abutting portion 541 in the middle and inclined portions 542 on both sides of the abutting portion 541. After the inclined portions 542 come into contact with the gate plate 300, they are squeezed and expand towards both sides of the abutting portion 541.

[0043] The middle abutting portion 541 of the sealing protrusion 540 can form a main abutting seal with the gate plate 300 to ensure the basic sealing effect. After the inclined portions 542 on both sides come into contact with the gate plate 300, they are squeezed and expand towards both sides of the abutting portion 541. On the one hand, it can greatly increase the contact area between the sealing protrusion 540 and the gate plate 300, extending the sealing range from the abutting portion 541 to both sides and covering a wider sealing area, reducing the possibility of water leakage from the sealing edge; on the other hand, the expansion deformation of the inclined portions 542 can adapt to the slight position deviation during the sliding process of the gate plate 300, avoiding the disengagement of the sealing protrusion 540 from the gate plate 300 due to the slight offset of the gate plate 300, maintaining the continuity of the seal, and avoiding the problem of sealing interruption caused by the offset of the gate plate 300.

[0044] Embodiment 4:

[0045] The embodiment of the present application provides a steel gate. In addition to including the above technical features, the steel gate of the embodiment of the present application further includes the following technical features.

[0046] As Figure 3 and Figure 4 shown, a sealing convex head 521 is provided at one end of the convex portion 520 in contact with the gate plate 300. The diameter of the sealing convex head 521 is larger than the diameter of the convex portion 520, and the sealing convex head 521 also contacts the fixing member 600.

[0047] In an embodiment of the present application, a sealing convex head 521 is provided at one end of the convex portion 520 in contact with the gate plate 300, and the diameter of the sealing convex head 521 is larger than the diameter of the convex portion 520, which can expand the contact area between the convex portion 520 and the gate plate 300, enhance the sealing pressure of the convex portion 520 on the gate plate 300, make the sealing convex head 521 closely fit with the gate plate 300, and block the leakage path of water flow between the convex portion 520 and the gate plate 300; meanwhile, the sealing convex head 521 contacts the fixing member 600, and an additional sealing surface can be formed between the convex portion 520 and the fixing member 600 to fill the gap between the two, avoiding the leakage of water flow from the mating portion of the convex portion 520 and the fixing member 600, and further improving the overall sealing performance.

[0048] Embodiment 5:

[0049] The embodiment of the present application provides a steel gate. In addition to including the above technical features, the steel gate of the embodiment of the present application further includes the following technical features.

[0050] As Figure 3 and Figure 4 shown, a circular mounting projection 430 is provided at one end of the support portion 410, and a limiting projection 440 extending inward is provided at the opening of the sliding groove 230, and the limiting projection 440 is adapted to the mounting projection 430.

[0051] In an embodiment of the present application, the circular mounting projection 430 at one end of the support portion 410 is adapted to the limiting projection 440 extending inward at the opening of the sliding groove 230, which can position the installation position of the support member 400 in the sliding groove 230, ensure that the support member 400 will not shift left and right after installation, make the seal 500 on the support member 400 always keep a facing contact with the gate plate 300, and avoid the generation of a sealing gap due to the misalignment of the seal 500 and the gate plate 300 caused by the shift of the support member 400. Meanwhile, the limiting projection 440 forms a limiting constraint on the mounting projection 430, which can prevent the support member 400 from moving axially during the sliding of the gate plate 300 or under the impact of water flow, maintain the overall position stability of the support member 400, and further ensure the stable cooperation relationship between the sealing mechanism and the gate plate 300, and avoid the damage of the sealing performance of the sealing structure due to the displacement of the support member 400. In addition, the adapted structure of the circular mounting projection 430 and the limiting projection 440 can reduce the installation gap between the support member 400 and the sliding groove 230, reduce the possibility of water flow infiltrating from the installation gap, and further improve the overall sealing effect of the sealing mechanism.

[0052] It should be noted that, in this document, the terms "comprising", "including" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0053] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Those of ordinary skill in the art, under the inspiration of the present application and without departing from the spirit and scope protected by the claims of the present application, can still make many forms, all of which fall within the protection scope of the present application.

Claims

1. A steel gate, characterized in that: include: Gate hoist (100); The gate frame (200) includes an upper frame (210) and a lower frame (220), and the upper frame (210) and the lower frame (220) are provided with communicating grooves (230); The gate plate (300) is slidably installed in the slide groove (230); A sealing mechanism is provided in the slide groove (230) to seal the slide groove (230) and the gate plate (300); The gate plate (300) is connected to the hoist (100) via the gate arm (110) and the winding rope (120).

2. A steel gate according to claim 1, characterized in that: The sealing mechanism includes: The support member (400) includes a U-shaped support portion (410) and a mounting portion (420) located at one end of the support portion (410) and extending outward; The sealing element (500) includes a U-shaped contact portion (510) disposed in the support portion (410) and a protrusion (520) disposed in the middle of the contact portion (510), and the gate plate (300) contacts the protrusion (520) and one end of the contact portion (510); The fastener (600) is L-shaped, with one right-angled side located between the other end of the contact portion (510) and the protrusion (520), and the other right-angled side in contact with the mounting portion (420); The fastener (600) and the mounting part (420) are fixed to the outside of the slide (230) by screws (610).

3. A steel gate according to claim 2, characterized in that: Multiple sealing ribs (530) are provided on both ends of the outer wall of the contact part (510) and the inner wall of the support part (410).

4. A steel gate according to claim 2, characterized in that: A sealing protrusion (540) is also provided on the end of the contact part (510) that contacts the gate plate (300).

5. A steel gate according to claim 4, characterized in that: The sealing protrusion (540) includes an abutment portion (541) located in the middle and inclined portions (542) located on both sides of the abutment portion (541). After the inclined portions (542) come into contact with the gate plate (300), they are squeezed and expand to both sides of the abutment portion (541).

6. A steel gate according to claim 2, characterized in that: A sealing protrusion (521) is provided on the end of the protrusion (520) that contacts the gate plate (300). The diameter of the sealing protrusion (521) is larger than the diameter of the protrusion (520), and the sealing protrusion (521) also contacts the fixing member (600).

7. A steel gate according to claim 2, characterized in that: One end of the support (410) is provided with a circular mounting protrusion (430), and the opening of the slide groove (230) is provided with an inwardly extending limiting protrusion (440), which is adapted to the mounting protrusion (430).

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