Quick intelligent fire hydrant system

Abstract

The utility model provides a quick and intelligent fire hydrant system which comprises a fire hydrant body and a water outlet channel from the bottom to the top, the bottom of the fire hydrant body is communicated with a fire-fighting water pipeline, the top of the fire hydrant body is provided with a connector, and the middle of the fire hydrant body is provided with a valve capable of opening or closing the water outlet channel. The execution device is detachably connected to the middle of the fire hydrant body, and a driving structure capable of driving the valve to be opened or closed when the execution device is connected to the fire hydrant body is arranged on the execution device; the intelligent top cover is detachably connected to the top of the fire hydrant body and can seal the connecting opening, and a wireless receiving and transmitting module capable of being networked with a water affair system and a fire fighting system is arranged in the intelligent top cover; and after the intelligent top cover is detached from the top of the fire hydrant body, the water outlet pipe connector is detachably connected to the top of the fire hydrant body and communicates with the water outlet channel, a water outlet connector used for being connected with a fire fighting pipe is arranged on the water outlet pipe connector, and efficiency can be improved through the system.

Description

Technical Field

[0001] The utility model specifically relates to a fast intelligent fire hydrant system. Background Art

[0002] With the acceleration of the urbanization process, fire safety has become an important part of urban management. Although the traditional fire hydrant system has ensured public safety to a certain extent, problems such as cumbersome operation, difficult maintenance, and untimely information feedback have become increasingly prominent, making it difficult to meet the high-efficiency and intelligent fire safety needs of modern cities. Especially in emergency situations, firefighters need to quickly locate available fire hydrants and ensure their normal operation. It is also difficult for firefighters to quickly open the fire hydrants, which affects the rescue efficiency. The limitations of the traditional fire hydrant system often lead to an extended response time and a delay in rescue time.

[0003] In recent years, the rapid development of Internet of Things information technology has made it possible for the intelligent transformation of the fire protection industry. Intelligent fire protection systems have gradually been integrated into the construction of modern urban infrastructure, aiming to improve the efficiency and accuracy of fire prevention and response through functions such as real-time monitoring, remote control, and intelligent analysis. For example, the patent solution with the patent number CN201811052048.1 and the name of an intelligent fire hydrant system. However, most of the current intelligent fire protection solutions on the market focus on aspects such as fire warning systems, fire source detection, and evacuation guidance. There is no good solution to key problems such as how to conveniently and quickly find a suitable fire hydrant and how to quickly install the fire pipeline.

[0004] The present utility model is precisely produced based on the above deficiencies. Summary of the Utility Model

[0005] The purpose of the present utility model is to overcome the deficiencies of the prior art and provide a fast intelligent fire hydrant system that can improve efficiency.

[0006] The present utility model is achieved through the following technical solutions:

[0007] A fast intelligent fire hydrant system includes

[0008] Fire hydrant body, having a water outlet channel from the bottom to the top, the bottom of the fire hydrant body is connected to the fire water pipeline, a connection port is provided at the top of the fire hydrant body, and a valve capable of opening or closing the water outlet channel is provided in the middle of the fire hydrant body; an actuating device, detachably connected to the middle of the fire hydrant body, and a driving structure capable of driving the valve to open or close when it is connected to the fire hydrant body is provided on the actuating device; an intelligent top cover, detachably connected to the top of the fire hydrant body and capable of covering the connection port, a wireless transceiver module capable of networking with the water service system and the fire protection system is provided in the intelligent top cover, and a positioning module capable of obtaining its own position information is also provided in the intelligent top cover; a water outlet pipe connection, when the intelligent top cover is detached from the top of the fire hydrant body, the water outlet pipe connection is detachably connected to the top of the fire hydrant body and communicated with the water outlet channel, and a water outlet interface for connecting the fire pipe is provided on the water outlet pipe connection.

[0009] For the quick intelligent fire hydrant system as described above, the fire hydrant body is provided with a locking structure for fixing the intelligent top cover or the water outlet pipe connection to the top of the fire hydrant body.

[0010] For the quick intelligent fire hydrant system as described above, connecting parts capable of being inserted into the water outlet channel from the connection port are provided at the bottoms of the intelligent top cover and the water outlet pipe connection, an annular groove is provided along the circumferential direction of the connecting part, the locking structure includes a buckle piece rotatably connected to the fire hydrant body, an eccentrically arranged locking part is provided on the buckle piece, a matching hole for the locking part to pass through and enter the water outlet channel is provided on the fire hydrant body, when the connecting part is inserted into the water outlet channel, the annular groove is located at a position corresponding to the matching hole, and a long strip-shaped handle part for people to operate is also provided on the buckle piece, when the handle part swings downward, the locking part passes through the matching hole and is clamped into the annular groove.

[0011] For the quick intelligent fire hydrant system as described above, at least two buckle pieces are arranged along the circumferential direction on the fire hydrant body, a safety hole is opened on the handle part, and a safety cable is connected to the handle part, and the safety cable passes through the safety holes of each buckle piece in sequence and is connected end to end to form a ring.

[0012] For the quick intelligent fire hydrant system as described above, the valve includes a valve body and a rotating shaft connected to the valve body, the end of the rotating shaft is exposed, the actuating device includes a main body and a battery for power supply, and the driving structure includes a driving motor arranged on the main body, and an output shaft sleeve capable of rotating and matching with the rotating shaft is connected to the driving motor.

[0013] The quick intelligent fire hydrant system described above, wherein a mounting seat is provided in the middle of the fire hydrant body, and an installation plate for placing the main body of the execution device and a positioning plate located above the installation plate are provided on the front side of the mounting seat. A positioning groove is provided on the positioning plate, and a positioning post that can be snapped into the positioning groove is provided on the top of the main body. The top of the positioning post is rotatably connected to a clamping member, and a clamping hook that can be hooked on the rear side of the mounting seat is provided at the end of the clamping member.

[0014] The quick intelligent fire hydrant system described above, wherein at least two water outlet interfaces are provided on the water outlet pipe connection, and a pipe connection cover corresponding to the water outlet interface is connected to the water outlet pipe connection. The pipe connection cover is detachably connected to the water outlet pipe connection and can cover the water outlet interface.

[0015] The quick intelligent fire hydrant system described above, wherein a locking structure for locking the pipe connection cover is provided between the water outlet pipe connection and the pipe connection cover.

[0016] The quick intelligent fire hydrant system described above, wherein a card slot is provided at the water outlet pipe connection near the water outlet interface. The locking structure includes a toggle buckle rotatably connected to the pipe connection cover. The toggle buckle has a locking portion eccentrically arranged, and a matching hole for the locking portion to pass through and enter the pipe connection cover is provided on the pipe connection cover. When the pipe connection cover is sleeved at the water outlet interface, the card slot is located at a position corresponding to the matching hole.

[0017] The quick intelligent fire hydrant system described above, wherein the guiding portion is a curved cone.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] 1. The execution device includes a battery and a drive motor, which is detachably and quickly connected to the fire hydrant. When not in use, it is stored at the workplace of firefighters to ensure the normal operation of the device, facilitate maintenance, shorten the valve opening time, control accurately, and at the same time, the valve opening operation through the execution device is labor-saving and tool-saving, reducing the time-consuming process of using tools.

[0020] 2. The intelligent top cover timely exchanges information with the water service system and the fire department, timely obtains the position of the fire hydrant, and timely obtains the status information of the fire hydrants in the area, shortening the process of finding available fire hydrants.

[0021] 3. The fire hydrant body and the water outlet pipe connection are designed separately. When the water outlet pipe connection is not in use, it is stored at the workplace of firefighters to avoid problems such as being unable to open due to improper maintenance. In addition, the split structure reduces the volume of a single fire hydrant, reduces the single manufacturing cost, and reduces the construction cost and operation and maintenance cost after the transformation of tens of thousands of above-ground fire hydrants in the city. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the fire hydrant system of the present utility model;

[0023] Figure 2 It is a schematic structural diagram of the idle state of the fire hydrant system of the present utility model;

[0024] Figure 3 It is a schematic structural diagram of the working state of the fire hydrant system of the present utility model;

[0025] Figure 4 It is a schematic sectional view of the idle state of the fire hydrant system of the present utility model;

[0026] Figure 5 It is a schematic sectional view of the working state of the fire hydrant system of the present utility model;

[0027] Figure 6 It is an exploded schematic diagram of the water outlet pipe connection of the fire hydrant system of the present utility model;

[0028] Figure 7 It is a schematic sectional view of the water outlet pipe connection of the fire hydrant system of the present utility model;

[0029] Figure 8 It is a schematic diagram of the principle of the intelligent top cover of the fire hydrant system of the present utility model. Detailed implementation manners

[0030] The present utility model will be further described below in conjunction with the accompanying drawings:

[0031] The orientations described in the specification of the present utility model, such as "upper", "lower", "left", "right", "front", "rear", etc., are all based on the orientations of the accompanying drawings and are for the purpose of facilitating the description of the relationships between various components, rather than indicating the only or absolute positional relationships between various components. It is only one of the implementation manners for realizing the present utility model and is not a limitation on its implementation manners.

[0032] As Figures 1 to 3 shown, a quick intelligent fire hydrant system in this embodiment includes a fire hydrant body 1, an actuator 2, an intelligent top cover 3, and a water outlet pipe connection 4. The structures of each component are as follows:

[0033] The fire hydrant body 1 has a water outlet channel 100 from the bottom to the top. The bottom of the fire hydrant body 1 is connected to the fire water pipeline, and the fire water pipeline is generally arranged below the bottom surface and is a pipeline with long-term water flow. The top of the fire hydrant body 1 is provided with a connection port 11, and a valve 12 capable of opening or closing the water outlet channel 100 is provided in the middle of the fire hydrant body 1. That is, the main structure of the fire hydrant body 1 is the same as that of a traditional fire hydrant, but the interface for connecting the pipeline at the top is a split structure, that is, the traditional fire hydrant is split into the fire hydrant body 1 and the water outlet pipe connection 4 that can be connected thereto;

[0034] An actuator 2 is detachably connected to the middle part of a fire hydrant body 1, and a driving structure 200 capable of driving a valve 12 to open or close when the actuator 2 is connected to the fire hydrant body 1 is provided on the actuator 2;

[0035] A water outlet pipe connection 4 is detachably connected to the top of the fire hydrant body 1 and communicated with a water outlet channel 100 after the intelligent top cover 3 is detached from the top of the fire hydrant body 1. A water outlet interface 41 for connecting a fire hose is provided on the water outlet pipe connection 4;

[0036] The intelligent top cover 3 is detachably connected to the top of the fire hydrant body 1 and can cover the connection port 11. The intelligent top cover 3 is internally provided with a micro-power consumption host, and the micro-power consumption host includes a wireless transceiver module 31, a positioning module 32, a power supply module 33, a storage module 34, and an operation module 35. The storage module 34 is responsible for storing relevant information such as the identity recognition information and location information of the intelligent top cover 3; the positioning module 32 is a GPS positioning module that can obtain its own location information. The wireless transceiver module 31 uses a general GPRS module, or Sigfox, Weightless, LTE-M (Cat-M1), NB-IoT, etc., which are designed for specific Internet of Things application scenarios and have the characteristics of ultra-low power consumption, wide coverage, and low cost. The intelligent top cover 3 is internally provided with a wireless transceiver module 31 that can be connected to the water service system and the fire protection system. The intelligent top cover 3 is also internally provided with a positioning module 32 that can obtain its own location information. The wireless transceiver module 31 transmits the location information to the water service system 8, and the water service system 8 sends the identification signal of whether there is water at this location to the intelligent top cover 3. The water service system is the intelligent water service Internet of Things system. The patent solutions can be referred to as the patent with the patent number CN202111405181.2 and the title of the intelligent water service Internet of Things zoning metering and early warning system based on data analysis, and the patent solution with the patent number CN202210063365.3 and the title of an intelligent water service management system and method based on Internet of Things data collection. The intelligent top cover 3 can obtain the information of whether water is flowing at this location by being connected to the water service system. The intelligent top cover 3 sends the location information and the identification signal to the fire protection system 9. The fire protection system 9 is the intelligent networking management system used by the fire department. The patent solution can be referred to as the patent with the patent number CN201110092659.0 and the title of the fire protection information management platform based on the Internet of Things. When the intelligent top cover 3 is connected to the fire protection system, it can send the location information of the fire hydrant at this location and the information of whether there is water to the fire protection system. The fire protection system can also send key information to the terminal devices of the fire fighters through the server. The design of the built-in micro-power consumption host is to minimize energy consumption, extend the service life of the device, and reduce the impact on the environment while ensuring comprehensive functions. This design is particularly important for facilities that need to be deployed outdoors for a long time and are inconvenient to maintain. The wireless transceiver module 31 serves as a bridge for the intelligent top cover 3 to communicate with external systems. This module can realize remote data exchange with the water service system and the fire protection system. This means that the intelligent top cover can upload its status information to the central management system in real time and receive instructions or update information from the system. The positioning module 32 can accurately obtain the geographical location information of the intelligent top cover through GPS or other positioning technologies.This is crucial for quickly locating fire-fighting resources, monitoring the distribution of fire hydrants, and rapidly responding in emergencies. The power supply module 33 can use ordinary storage batteries. Or considering that the intelligent top cover needs to work for a long time without an external power supply, the power supply module may adopt solar charging, energy harvesting, or other long-life battery technologies to ensure the continuous operation of the device. The storage module 34 stores key data such as identification information and historical location records, providing a basis for device management, tracking, and data analysis. The operation module 35 processes the data collected from various sensors and executes preset logical judgments or simple calculation tasks. For example, it judges the water supply status according to the received water supply system signal and makes corresponding responses.

[0037] When the above system is idle, the intelligent top cover 3 covers the connection port 11 of the fire hydrant body 1. Through the wireless transceiver module 31, the location information and the information of whether there is water at this place can be shared with the fire-fighting system.

[0038] When the above system is in use, when the fire-fighting personnel arrive at the fire scene, they obtain the specific location of the nearby fire hydrants through the fire-fighting system, quickly find the nearest fire hydrant, then remove the intelligent top cover 3 and install the water outlet pipe joint 4. The water outlet pipe joint 4 can also be quickly connected to the fire-fighting water spray pipe. Then the actuator 2 is connected to the fire hydrant body 1, and the valve is opened through the actuator 2 to achieve the quick installation and opening of the fire hydrant.

[0039] As a preferred solution, as Figure 4 shown, the fire hydrant body 1 is provided with a locking structure 5 for fixing the intelligent top cover 3 or the water outlet pipe joint 4 on the top of the fire hydrant body 1.

[0040] As a preferred implementation manner of the locking structure 5, as Figure 4 shown, both the bottom of the intelligent top cover 3 and the water outlet pipe joint 4 are provided with a connecting portion A that can be inserted into the water outlet channel 100 from the connection port 11. The connecting portion A is provided with an annular groove A1 along the circumferential direction. The locking structure 5 includes a buckle 51 rotatably connected to the fire hydrant body 1. The buckle 51 has an eccentrically arranged locking portion 511. The fire hydrant body 1 is provided with a mating hole 52 for the locking portion 511 to pass through and enter the water outlet channel 100. When the connecting portion A is inserted into the water outlet channel 100, the annular groove A1 is located at a position corresponding to the mating hole 52. The buckle 51 also has a long handle portion 512 for people to operate. When the handle portion 512 swings downward, due to the eccentric arrangement of the locking portion 511, the locking portion 511 is inserted into the mating hole 52. At this time, the locking portion 511 presses against the annular groove A1, thereby locking the connecting portion A. On the contrary, when the handle portion 512 swings upward, the locking portion 511 disengages from the annular groove A1, thereby unlocking.

[0041] As a preference, asFigure 4 As shown in the figure, at least two buckle parts 51 are arranged on the fire hydrant body 1 along the circumferential direction. An insurance hole 513 is formed on the handle part 512. The handle part 512 is connected with an insurance cable 53. The insurance cable 53 passes through the insurance holes 513 of each buckle part 51 in sequence and is connected end to end to form a ring. The insurance cable 53 is made of a metal rope to connect each handle part 512, so that the handle part 512 cannot swing upwards greatly. Only after the insurance cable 53 is released or cut off can the handle part 512 swing upwards greatly, playing an insurance role.

[0042] As a preferred solution, as Figure 3 and Figure 5 shown, the valve 12 includes a valve body 121 and a rotating shaft 122 connected to the valve body 121. The end of the rotating shaft 122 is exposed. The actuator 2 includes a main body 21 and a battery 22 for power supply. The driving structure 200 includes a driving motor 211 arranged on the main body 21. The driving motor 211 is connected with an output shaft sleeve 212 that can rotate and matches the rotating shaft 122. Specifically, teeth or grooves are provided on the circumferential surface of the rotating shaft 122, and the output shaft sleeve 212 can be sleeved on the rotating shaft 122 and the inner side surface is provided with a shape matching the rotating shaft 122. In addition, a copper sleeve 123 is provided between the rotating shaft 122 and the fire hydrant body 1 to reduce rotational friction, avoid corrosion, and avoid static electricity. In addition to the actuator 2 being powered by the battery 22 and cooperating with the motor to work, it can also be realized by a cylinder cooperating with a pneumatic control system, or by a hydraulic cylinder cooperating with a hydraulic device.

[0043] Specifically, as Figure 3 and Figure 5 shown, an installation seat 13 is provided in the middle of the fire hydrant body 1. The front side of the installation seat 13 is provided with an installation plate 131 for placing the main body 21 of the actuator 2 and a positioning plate 132 located above the installation plate 131. A positioning groove 133 is provided on the positioning plate 132. A positioning column 213 that can be stuck into the positioning groove 133 is provided on the top of the main body 21. The top of the positioning column 213 is rotatably connected with a clamping part 214. A clamping hook 215 that can be hooked on the rear side of the installation seat 13 is provided at the end of the clamping part 214. In this way, when the actuator 2 is installed on the fire hydrant body 1, the main body 21 is placed on the installation plate 131, and the position is limited by the positioning column 213 for precise positioning. After the actuator 2 is installed on the fire hydrant body 1, the output shaft sleeve 212 is aligned and sleeved with the rotating shaft 122, and then the main body 21 is locked by the clamping part 214.

[0044] As a preferred solution, as Figure 6 and Figure 7As shown, there are at least two water outlet interfaces 41 provided on the water outlet pipe connection 4. Specifically, two or more water outlet interfaces 41 are provided, and they are actually designed with different specifications of calibers to adapt to different fire hoses. The water outlet pipe connection 4 is connected with a pipe connection cover 6 corresponding to the water outlet interface 41. The pipe connection cover 6 is detachably connected to the water outlet pipe connection 4 and can cover the water outlet interface 41.

[0045] Specifically, as Figure 6 and Figure 7 shown, a locking structure 7 capable of locking the pipe connection cover 6 is provided between the water outlet pipe connection 4 and the pipe connection cover 6.

[0046] Specifically, as Figure 6 and Figure 7 shown, a clamping groove 42 is provided on the water outlet pipe connection 4 near the water outlet interface 41. The locking structure 7 includes a toggle buckle 71 rotatably connected to the pipe connection cover 6. The toggle buckle 71 has an eccentrically arranged locking portion 711. A matching hole 72 for the locking portion 711 to pass through and enter the pipe connection cover 6 is provided on the pipe connection cover 6. When the pipe connection cover 6 is sleeved at the water outlet interface 41, the clamping groove 42 is located at a position corresponding to the matching hole 72. The principle and structure of the locking structure 7 are substantially the same as those of the above-mentioned locking structure 5, and reference can be made to Figure 6 and 7 , and no further elaboration will be made.

[0047] The above are only embodiments of the present invention, and common knowledge such as specific structures and characteristics well known in the art are not described in detail here. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to explain the content of the claims.

Claims

1. A fast and intelligent fire hydrant system, characterized in that, including a fire hydrant body (1) having a water outlet channel (100) from the bottom to the top. The bottom of the fire hydrant body (1) is connected to a fire water pipeline, the top of the fire hydrant body (1) is provided with a connection port (11), and a valve (12) capable of opening or closing the water outlet channel (100) is provided in the middle of the fire hydrant body (1); an actuating device (2) detachably connected to the middle of the fire hydrant body (1), and a driving structure (200) capable of driving the valve (12) to open or close when it is connected to the fire hydrant body (1) is provided on the actuating device (2); an intelligent top cover (3) detachably connected to the top of the fire hydrant body (1) and capable of covering the connection port (11). A wireless transceiver module (31) capable of networking with the water service system and the fire protection system is provided in the intelligent top cover (3), and a positioning module (32) capable of obtaining its own position information is also provided in the intelligent top cover (3); a water outlet pipe connection (4), when the intelligent top cover (3) is detached from the top of the fire hydrant body (1), the water outlet pipe connection (4) is detachably connected to the top of the fire hydrant body (1) and communicated with the water outlet channel (100), and a water outlet interface (41) for connecting a fire pipe is provided on the water outlet pipe connection (4).

2. The quick intelligent fire hydrant system according to claim 1, characterized in that: The fire hydrant body (1) is provided with a locking structure (5) for fixing the intelligent top cover (3) or the water outlet pipe connection (4) to the top of the fire hydrant body (1).

3. The quick intelligent fire hydrant system according to claim 2, characterized in that: Both the bottom of the intelligent top cover (3) and the water outlet pipe connection (4) are provided with a connecting portion (A) capable of being inserted into the water outlet channel (100) from the connection port (11). An annular groove (A1) is provided along the circumferential direction of the connecting portion (A). The locking structure (5) includes a buckle (51) rotatably connected to the fire hydrant body (1). An eccentric locking portion (511) is provided on the buckle (51). A matching hole (52) for the locking portion (511) to pass through and enter the water outlet channel (100) is provided on the fire hydrant body (1). When the connecting portion (A) is inserted into the water outlet channel (100), the annular groove (A1) is located at a position corresponding to the matching hole (52). A long handle portion (512) for manual operation is also provided on the buckle (51). When the handle portion (512) swings downward, the locking portion (511) passes through the matching hole (52) and is snapped into the annular groove (A1).

4. The quick intelligent fire hydrant system according to claim 3, characterized in that: At least two buckles (51) are arranged along the circumferential direction on the fire hydrant body (1). A safety hole (513) is provided on the handle portion (512). The handle portion (512) is connected with a safety cable (53). The safety cable (53) sequentially passes through the safety holes (513) of each buckle (51) and is connected end to end to form a ring.

5. The quick intelligent fire hydrant system according to claim 1, wherein: The described valve (12) includes a valve body (121) and a rotating shaft (122) connected to the valve body (121). The end of the rotating shaft (122) is exposed. The described actuator (2) includes a main body (21) and a battery (22) for power supply. The drive structure (200) includes a drive motor (211) provided on the main body (21). The drive motor (211) is connected to an output shaft sleeve (212) that can rotate and matches the rotating shaft (122).

6. The quick intelligent fire hydrant system according to claim 5, characterized in that: The middle part of the described fire hydrant body (1) is provided with a mounting seat (13). The front side of the mounting seat (13) is provided with a mounting plate (131) for placing the main body (21) of the actuator (2) and a positioning plate (132) located above the mounting plate (131). The positioning plate (132) is provided with a positioning groove (133). The top of the main body (21) is provided with a positioning post (213) that can be inserted into the positioning groove (133). The top of the positioning post (213) is rotatably connected to a clamping member (214). The end of the clamping member (214) is provided with a clamping hook (215) that can be hooked on the rear side of the mounting seat (13).

7. The quick intelligent fire hydrant system according to claim 1, wherein: The described water outlet connection (4) is provided with at least two water outlet interfaces (41). The water outlet connection (4) is connected to a pipe connection cover (6) corresponding to the water outlet interface (41). The pipe connection cover (6) is detachably connected to the water outlet connection (4) and can cover the water outlet interface (41).

8. The quick intelligent fire hydrant system according to claim 7, characterized in that: A locking structure (7) capable of locking the pipe connection cover (6) is provided between the water outlet connection (4) and the pipe connection cover (6).

9. The quick intelligent fire hydrant system according to claim 8, characterized in that: The water outlet connection (4) is provided with a card slot (42) near the water outlet interface (41). The locking structure (7) includes a toggle button (71) rotatably connected to the pipe connection cover (6). The toggle button (71) has a locking portion (711) eccentrically arranged. The pipe connection cover (6) is provided with a matching hole (72) for the locking portion (711) to pass through and enter the pipe connection cover (6). When the pipe connection cover (6) is sleeved at the water outlet interface (41), the card slot (42) is located at a position corresponding to the matching hole (72).

Images