Watertight cabin door onboard positioning device and method

Abstract

The invention discloses a watertight cabin door onboard positioning device and method. The watertight cabin door onboard positioning device comprises a positioning body, a watertight cabin door hinge positioning connector, a hydraulic actuator cylinder vertical positioning connector, a hydraulic actuator cylinder horizontal positioning connector, a vertical suspension fixing support arm and a pressing pin. A watertight cabin door hinge positioning connector, a hydraulic actuator cylinder vertical positioning connector and a hydraulic actuator cylinder horizontal positioning connector are installed on the positioning body, and the coaxiality and the distance of the three are kept consistent. According to the onboard positioning device for the watertight cabin door, the coaxiality and the relative position precision of the watertight cabin door in the installation process are ensured through the accurately designed positioning body and the positioning connectors, and therefore the positioning accuracy is greatly improved. The positioning device and the positioning method are not only suitable for positioning and mounting of the watertight cabin door of the airplane, but also can be widely applied to other fields needing high-precision positioning and mounting, such as mounting of large components in the manufacturing industry of ships, automobiles and the like.

Description

Technical Field

[0001] The present application belongs to the technical field of aircraft manufacturing, and relates to an onboard positioning device and method for a watertight door. Background Art

[0002] Since stress is released after the aircraft is assembled, the positioning datum of the structural parts is deformed to varying degrees, and the measurement cost of the deformation direction and deformation size is high. Therefore, when special aircraft undergo structural modification under the basic configuration, the on-board positioning datum is significantly different from the theoretical datum. For the watertight door delivery system of fire extinguishers, the required relative position relationship is more complex and requires more precision, and the commonly used positioning method cannot meet the design requirements. Summary of the invention

[0003] The purpose of the present application is to solve the problems in the prior art and to provide an onboard positioning device and method for a watertight door.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions: In the first aspect, the present application provides an onboard positioning device for a watertight door, comprising a positioning body, a watertight door hinge positioning joint, a hydraulic actuator vertical positioning joint, a hydraulic actuator horizontal positioning joint, a vertical suspension fixed support arm and a clamping pin; the positioning body is equipped with a watertight door hinge positioning joint, a hydraulic actuator vertical positioning joint and a hydraulic actuator horizontal positioning joint, and the coaxiality and distance of the three are kept consistent.

[0005] Furthermore, the positioning body of the present application is provided with a through hole for installing a vertical suspension fixed arm and an internal threaded hole for installing a clamping pin, so that the position of the positioning device in the horizontal direction can be adjusted. At the same time, the nut tightening the lower end in the vertical direction can tighten the positioning device to the fuselage positioning reference, thereby playing a fixing role.

[0006] Furthermore, the positions of the watertight door hinge positioning joint, the hydraulic actuator vertical positioning joint and the hydraulic actuator horizontal positioning joint on the positioning body of the present application are relative, and the relative position between the actuator and the door suspension joint is fixed and coaxially arranged.

[0007] Furthermore, a threaded shaft is provided at the lower part of the vertically suspended fixed arm of the present application, and the relative height of the positioning device and the watertight door door frame is adjusted by tightening a nut matching the threaded shaft. An upper bracket of the vertically suspended fixed arm is attached to the upper frame of the watertight door to maintain the relative stability of the positioning device and the body.

[0008] Furthermore, the threaded shaft of the clamping pin of the present application is provided with a thread matching the positioning body, and by rotating the clamping pin, the end of the threaded shaft is squeezed against the inner surface of the watertight cabin door frame, thereby driving the positioning body to move in the opposite direction to fit against the inner surface of the upper door frame on the other side.

[0009] Furthermore, two adjacent sides of the positioning body of the present application are provided with threads that cooperate with the clamping pins, and tightening the clamping pins on the two adjacent sides at the same time can restrict the movement of the positioning device in the horizontal direction.

[0010] Furthermore, the positioning body, the watertight door hinge positioning joint, the hydraulic actuator vertical positioning joint and the hydraulic actuator horizontal positioning joint of the present application are all detachably connected.

[0011] In a second aspect, the present application provides a method for positioning a watertight door on board, comprising the following steps: Install the onboard positioning device of the watertight door on the water-dropping port frame of the watertight door; determine the position of the positioning device by adjusting the vertical hanging fixed support arm and the pressing pin; insert the pin rod into the vertical positioning joint of the hydraulic actuator and the horizontal positioning joint of the hydraulic actuator, and connect the watertight door to the hinge positioning joint of the watertight door to complete the onboard positioning of the watertight door.

[0012] Furthermore, when adjusting the vertical suspension fixed arm, the present application inserts the lower threaded shaft of the vertical suspension fixed arm into the through hole of the positioning body, and adjusts the vertical suspension fixed arm until the reference plane of the positioning device is aligned with the lower surface of the upper frame of the watertight hatch, and then tightens the nut matching the threaded shaft to fix the height.

[0013] Furthermore, when adjusting the clamping pin, the present application first screws the clamping pin into the threaded hole of the positioning body, then tightens the clamping pin to fit the positioning device with the side of the watertight cabin door frame, and finally tightens all the clamping pins on the positioning body to ensure that the four sides of the positioning body are constrained, thereby determining the horizontal position of the positioning device.

[0014] Compared with the prior art, this application has the following beneficial effects: The onboard positioning device for the watertight door of the present application ensures the coaxiality and relative position accuracy of the watertight door during the installation process through the precisely designed positioning body and positioning joints, thereby greatly improving the accuracy of positioning. The present application adopts a combination design of a vertically suspended fixed support arm and a clamping pin, so that the positioning device can be firmly suspended and fixed on the water-injection port frame of the watertight door, and the stability of the device can be maintained even in complex environments. The positioning device and positioning method of the present application are not only suitable for the positioning and installation of aircraft watertight doors, but can also be widely used in other fields that require high-precision positioning and installation, such as the installation of large components in manufacturing industries such as ships and automobiles. Finally, the positioning device of the present application has a concise and clear structure, and the connection and fixing methods between the components are simple and reliable, which is convenient for subsequent maintenance and overhaul work.

[0015] Furthermore, the threaded shaft design of the lower part of the vertical suspension fixed support arm of the present application allows the height of the positioning device to be easily adjusted by the fastening nut to adapt to watertight doors of different sizes and shapes. At the same time, the threaded design of the clamping pin also allows the horizontal position of the positioning device to be easily fine-tuned, thereby simplifying the installation process.

[0016] Furthermore, the present application reduces possible errors and rework during the installation process through precise positioning and stable device design, thereby reducing production costs and time costs, ensuring the accuracy and reliability of the watertight hatch during the installation process, and further improving the quality and performance of the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is a schematic diagram of the structure of the onboard positioning device for the watertight door of the present application.

[0019] Figure 2 This is a schematic diagram of the structure of the vertically suspended fixed support arm of this application; wherein, Figure 2-1 For the main view, Figure 2-2 is a top view, Figure 2-3 It is the right view.

[0020] Figure 3 This is a schematic diagram of the structure of the clamping pin of this application; wherein, Figure 3-1 For the main view, Figure 3-2 is a top view, Figure 3-3 It is a side view.

[0021] Among them: 1-positioning body; 2-watertight door hinge positioning joint; 3-hydraulic actuator vertical positioning joint; 4-hydraulic actuator horizontal positioning joint; 5-vertical suspension fixed arm; 6-clamping pin; 7-vertical suspension fixed arm lower threaded shaft; 8-vertical suspension fixed arm upper bracket; 9-clamping pin threaded shaft. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the 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. The components of the embodiments of the present application 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 application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invented product is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does 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 application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] The present application is further described in detail below with reference to the accompanying drawings: See also Figure 1 The embodiment of the present application discloses an onboard positioning device for a watertight door, comprising a positioning body 1, a watertight door hinge positioning joint 2, a hydraulic actuator vertical positioning joint 3, a hydraulic actuator horizontal positioning joint 4, a vertical suspension fixed arm 5, and a clamping pin 6. The positioning body 1 is provided with a through hole for installing the vertical suspension fixed arm 5 and an internal threaded hole for the clamping pin 6. The position of the positioning device can be adjusted in the horizontal direction, and the nut at the lower end is tightened in the vertical direction so that the positioning device is closely attached to the fuselage positioning reference, thereby playing a fixing role.

[0029] In actual application, the positioning body 1 is the core component of the entire positioning device, and the watertight door hinge positioning joint, hydraulic actuator vertical positioning joint and hydraulic actuator horizontal positioning joint are installed on the positioning body. The positions of these joints on the positioning body and the coaxiality and distance between them are precisely designed to meet the requirements of watertight door installation.

[0030] The watertight door hinge positioning joint 2 is used to connect and position the hinge part of the watertight door to ensure that the door can maintain the correct angle and position during installation.

[0031] The two joints, the hydraulic actuator vertical positioning joint 3 and the hydraulic actuator horizontal positioning joint 4, are used to connect and position the vertical and horizontal parts of the hydraulic actuator respectively. The hydraulic actuator is a key component that drives the watertight door to open and close, and its correct installation is crucial to the performance and safety of the door.

[0032] like Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of the vertically suspended fixed support arm of this application. Specifically, Figure 2-1 ~ Figure 2-3 The vertical hanging fixed arm 5 is used to hang and fix the positioning device as a whole on the water-dropping port frame of the watertight hatch. A threaded shaft is provided at the lower part of the vertical hanging fixed arm, and the relative height between the positioning device and the watertight hatch door frame can be adjusted by tightening a nut matching the threaded shaft.

[0033] like Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of the clamping pin of this application, specifically, Figure 3-1 ~ Figure 3-3 The three-view diagram of the clamping pin. The clamping pin 6 adjusts the relative position of the positioning device and the mouth frame by tightening the extrusion mouth frame, so that the tooling is close to the positioning reference surface. The threaded shaft of the clamping pin is provided with a thread matching the positioning body. By rotating the clamping pin, its end can be squeezed against the inner surface of the watertight hatch door frame, thereby driving the positioning body to move in the opposite direction to fit with the inner surface of the upper mouth frame on the other side.

[0034] In a feasible embodiment of the present application, a watertight door hinge positioning joint 2, a hydraulic actuator vertical positioning joint, and a hydraulic actuator horizontal positioning joint 4 are installed on the positioning body 1 of the present application. The coaxiality and distance of the three are consistent with the product requirements. There is an intersection hole for the positioning actuator and the door suspension joint on the joint. After the positions of the actuator joint and the door suspension joint are determined according to the intersection hole, they are connected using pins to ensure the coaxiality of the watertight door hinge positioning joint 2, the hydraulic actuator vertical positioning joint, and the hydraulic actuator horizontal positioning joint 4. No matter how the positioning device moves, the relative positions of the watertight door hinge positioning joint 2, the hydraulic actuator vertical positioning joint 3, and the hydraulic actuator horizontal positioning joint 4 always remain consistent.

[0035] In practical applications, the positioning body 1 of the present application is provided with a through hole for installing the vertical suspension fixing arm 5 and an internal threaded hole for installing the clamping pin 6. The positions and sizes of these holes are precisely calculated to ensure the position adjustability of the positioning device in the horizontal and vertical directions.

[0036] Specifically, the relative positions of the watertight door hinge positioning joint 2, the hydraulic actuator vertical positioning joint 3 and the hydraulic actuator horizontal positioning joint 4 on the positioning body 1 are determined, and the coaxiality and distance of the three are kept consistent. This ensures that the relative positions between the actuator and the door suspension joint installed by these joints are fixed and coaxial.

[0037] In a feasible embodiment of the present application, the lower threaded shaft 7 of the vertically suspended fixed arm 5 is used to adjust the relative height between the positioning device and the watertight door frame by tightening a nut matching the threaded shaft. At the same time, the upper bracket 8 of the vertically suspended fixed arm fits with the upper frame of the watertight door to maintain the relative stability of the positioning device and the body. The lower part of the vertically suspended fixed arm 5 has a threaded shaft 7, and the relative height between the positioning device and the watertight door frame is adjusted by tightening a nut matching the threaded shaft 7; the upper bracket 8 of the vertically suspended fixed arm fits with the upper frame of the watertight door. The threaded shaft 9 of the clamping pin has a thread matching the positioning body 1, and the positioning device is adjusted to fit with the inner end face of the watertight door frame by rotating the clamping pin 6.

[0038] In actual application, the relative positions of the watertight door hinge positioning joint 2, the hydraulic actuator vertical positioning joint 3, and the hydraulic actuator horizontal positioning joint 4 on the positioning body 1 are determined by the present application. The relative positions of the actuator and the door suspension joint installed by the watertight door hinge positioning joint 2, the hydraulic actuator vertical positioning joint 3, and the hydraulic actuator horizontal positioning joint 4 are positioned and installed, and the coaxiality of the two ends of the actuator and the door suspension joint is ensured.

[0039] In a feasible embodiment, the lower threaded shaft 7 of the vertically suspended fixed arm of the present application is threaded. By tightening the nut matching the threaded shaft 7, the relative height between the positioning device and the watertight door frame is adjusted, and the upper bracket 8 of the vertically suspended fixed arm fits with the upper frame of the watertight door to ensure the relative stability of the positioning device and the fuselage. The threaded shaft 9 of the clamping pin of the present application is threaded. When the clamping pin 6 is rotated, the end of the threaded shaft 9 of the clamping pin is pressed against the inner surface of the upper frame, driving the positioning body 1 to move in the opposite direction until it fits with the inner surface of the upper frame on the other side. The adjacent two sides of the onboard positioning device of the watertight door of the present application have threads matching the clamping pin 6. At the same time, tighten the clamping pins 6 on the two adjacent sides to constrain the movement of the positioning device in the horizontal direction.

[0040] Working process of this application: Insert the lower threaded shaft 7 of the vertical suspension fixed arm into the through hole of the positioning body 1, adjust the vertical suspension fixed arm 5 to ensure that the reference surface of the positioning device is aligned with the lower surface of the upper frame, and the upper bracket 8 of the vertical suspension fixed arm is placed on the upper surface of the upper frame; screw the clamping pin 6 into the threaded hole of the positioning body 1, tighten the clamping pin 6 to make the side of the positioning device in the opposite direction fit with the inner surface of the upper frame, and the horizontal position of the positioning device is determined; after the position of the positioning device is determined; insert the pin rod into the vertical positioning joint 3 of the hydraulic actuator and the horizontal positioning joint 4 of the hydraulic actuator, and connect the watertight door to the watertight door hinge positioning joint 2, thereby completing the on-board positioning of the watertight door.

[0041] The embodiment of the present application provides a method for positioning a watertight door on board, comprising the following steps: 1) The watertight door hinge positioning joint 2, the hydraulic actuator vertical positioning joint 3, and the hydraulic actuator horizontal positioning joint 4 are installed on the positioning body 1 to ensure that the two ends of the actuator installed on the joint and the door suspension joint are fixed in relative position and coaxial; In practical application, the positioning device on the watertight door is integrally installed on the water-dropping port frame of the watertight door. At this moment, the positioning device is tentatively connected with the upper port frame of the watertight door by its vertical hanging fixed arm 5.

[0042] 2) Insert the threaded shaft 7 at the lower part of the vertical suspension fixed arm into the through hole of the positioning body 1, adjust the vertical suspension fixed arm 5 until the reference surface of the positioning device is aligned with the lower surface of the upper frame, and place the upper bracket 8 of the vertical suspension fixed arm on the upper surface of the upper frame. The height of the positioning device is determined, and tighten the nut matching the threaded shaft 7; In practical applications, the height of the positioning device is determined by adjusting the vertical suspension fixed arm 5. The specific operation is: insert the threaded shaft 7 at the lower part of the vertical suspension fixed arm into the through hole of the positioning body 1, and adjust the length of the vertical suspension fixed arm 5 as needed until the reference surface of the positioning device is aligned with the lower surface of the upper frame of the watertight hatch. Then, tighten the nut matching the threaded shaft 7 to ensure the stability of the positioning device in the vertical direction.

[0043] 3) Screw the clamping pin 6 into the threaded hole of the positioning body 1, and tighten the clamping pin 6 to fit the positioning device to the side of the water inlet frame; In actual application, the clamping pin 6 is used to adjust the horizontal position of the positioning device. First, screw the clamping pin 6 into the threaded hole of the positioning body 1 and tighten it preliminarily. Then, by rotating the clamping pin 6, the end of the threaded shaft 9 is pressed against the inner surface of the upper frame of the watertight hatch, thereby driving the positioning body 1 to move in the opposite direction until the other side of the positioning body 1 fits with the other inner surface of the upper frame. This step needs to be repeated until the four side surfaces of the positioning body 1 are tightly fitted with the inner side surface of the upper frame to ensure the stability of the positioning device in the horizontal direction.

[0044] 4) Tighten all the clamping pins 6 on the positioning body 1. The adjacent two sides of the positioning body 1 with the clamping pins 6 are squeezed with the inner side of the upper frame through the clamping pin threaded shaft 9. The adjacent two sides of the positioning body 1 without the clamping pins 6 are directly attached to the inner side of the upper frame. The movement of the four sides of the positioning body 1 is constrained, and the horizontal position of the positioning device is determined. In actual application, after ensuring that the positioning device is stable in both horizontal and vertical directions, all the clamping pins 6 on the positioning body 1 are further tightened. At this time, the adjacent two sides of the positioning body 1 with the clamping pins 6 generate a greater extrusion force with the inner side of the upper frame through the clamping pin threaded shaft 9, while the adjacent two sides without the clamping pins 6 are directly attached to the inner side of the upper frame. This design not only enhances the connection strength between the positioning device and the upper frame, but also restricts any slight movement of the positioning device in the horizontal direction.

[0045] 5) After the position of the positioning device is determined; insert the pin rod into the hydraulic actuator vertical positioning joint 3 and the hydraulic actuator horizontal positioning joint 4, and connect the watertight door to the watertight door hinge positioning joint 2, thereby completing the on-board positioning of the watertight door.

[0046] In actual application, after completing all the above adjustments, the final positioning operation is performed. The specific steps are: insert pins into the hydraulic cylinder vertical positioning joint 3 and the hydraulic cylinder horizontal positioning joint 4 respectively to fix the positions of the two positioning joints relative to the positioning body 1. Then, connect the watertight door itself to the watertight door hinge positioning joint 2 to ensure that the door can be accurately suspended on the positioning device and form a stable and sealed whole with the aircraft body.

[0047] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A watertight door onboard positioning device, characterized in that: It comprises a positioning body (1), a watertight door hinge positioning joint (2), a hydraulic actuator vertical positioning joint (3), a hydraulic actuator horizontal positioning joint (4), a vertical suspension fixed support arm (5) and a clamping pin (6); the positioning body (1) is provided with a watertight door hinge positioning joint (2), a hydraulic actuator vertical positioning joint (3) and a hydraulic actuator horizontal positioning joint (4), and the coaxiality and distance of the three are kept consistent.

2. The watertight door onboard positioning device according to claim 1, characterized in that: The positioning body (1) is provided with a through hole for installing a vertical suspension fixed support arm (5) and an internal threaded hole for installing a clamping pin (6), so that the position of the positioning device in the horizontal direction can be adjusted. At the same time, a nut tightened at the lower end in the vertical direction can make the positioning device close to the fuselage positioning reference, thereby playing a fixing role.

3. The watertight door onboard positioning device according to claim 1, characterized in that: The watertight door hinge positioning joint (2), the hydraulic actuator vertical positioning joint (3) and the hydraulic actuator horizontal positioning joint (4) are positioned relative to each other on the positioning body (1), and the relative position between the actuator and the door suspension joint is fixed and coaxially arranged.

4. The watertight door onboard positioning device according to claim 1, characterized in that: A threaded shaft (7) is provided at the lower part of the vertical hanging fixed support arm (5), and the relative height between the positioning device and the watertight hatch door frame is adjusted by tightening a nut matching the threaded shaft (7). An upper bracket (8) of the vertical hanging fixed support arm is attached to the upper frame of the watertight hatch door, and is used to maintain the relative stability of the positioning device and the body.

5. The watertight door onboard positioning device according to claim 1, characterized in that: The threaded shaft (9) of the clamping pin (6) is provided with a thread matching the positioning body (1), and by rotating the clamping pin (6), the end of the threaded shaft (9) is pressed against the inner surface of the watertight hatch door frame, thereby driving the positioning body (1) to move in the opposite direction until it is in contact with the inner surface of the upper door frame on the other side.

6. The watertight door onboard positioning device according to claim 1, characterized in that: Two adjacent sides of the positioning body (1) are provided with threads that match the clamping pin (6), and tightening the clamping pins (6) on the two adjacent sides simultaneously can restrict the movement of the positioning device in the horizontal direction.

7. The onboard positioning device for a watertight door according to any one of claims 1 to 6, characterized in that: The positioning body (1), the watertight door hinge positioning joint (2), the hydraulic actuator vertical positioning joint (3) and the hydraulic actuator horizontal positioning joint (4) are all detachably connected.

8. A method for positioning a watertight door on board using the device as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: The onboard positioning device of the watertight door is installed on the water-dropping port frame of the watertight door; the position of the positioning device is determined by adjusting the vertical suspension fixed support arm (5) and the pressing pin (6); a pin is inserted into the hydraulic actuator vertical positioning joint (3) and the hydraulic actuator horizontal positioning joint (4), and the watertight door is connected to the watertight door hinge positioning joint (2), thereby completing the onboard positioning of the watertight door.

9. The method for positioning a watertight door on board according to claim 8, characterized in that: When adjusting the vertical suspension fixing arm (5), the threaded shaft (7) at the lower part of the vertical suspension fixing arm is inserted into the through hole of the positioning body (1), and the vertical suspension fixing arm (5) is adjusted until the reference surface of the positioning device is aligned with the lower surface of the upper frame of the watertight hatch, and then the nut matching the threaded shaft (7) is tightened to fix the height.

10. The method for positioning a watertight door on board according to claim 8, characterized in that: When adjusting the clamping pin (6), first screw the clamping pin (6) into the threaded hole of the positioning body (1), then tighten the clamping pin (6) to fit the positioning device to the side of the watertight door frame, and finally tighten all the clamping pins (6) on the positioning body (1) to ensure that the four sides of the positioning body (1) are constrained, thereby determining the position of the positioning device in the horizontal direction.

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