Integrated gas detector

Abstract

The utility model belongs to the technical field of gas detectors, and relates to an integrated gas detector, which comprises a display, a unit connecting piece arranged below the display, a plurality of gas detection units arranged below the unit connecting piece, each gas detection unit comprises a sliding ring and a mounting shell, and the mounting shell is elastically sleeved on the sliding ring. A positioning ball is arranged on the sliding ring; a filter unit is arranged on the mounting shell and comprises a filter screen and a cylinder with two open ends, the filter screen is mounted in the cylinder, the upper end of the cylinder is inserted into the lower end of the sliding ring through a positioning device, and a knocking unit is arranged between the cylinder and the sliding ring. According to the utility model, the plurality of gas detection units can be mounted at different height positions on the wall body through the arrangement of the mounting bracket, the flexible placement of the plurality of gas detection units can be realized, the simultaneous detection requirements of gases with different specific gravities are met, and meanwhile, the plurality of gas detection units share one display, so that the detection efficiency is improved. And the cost is greatly reduced.

Description

Technical Field

[0001] This utility model belongs to the field of gas detector technology, and in particular relates to integrated gas detectors. Background Technology

[0002] Currently, industrial gas detectors generally consist of two parts: a main housing (containing the motherboard, display board, wiring devices, etc.) and a gas detection unit (containing sensors and other detection components). Depending on the type of gas detected, they are generally divided into single-gas detectors and multi-gas detectors (such as...). Figure 1 As shown), "When detecting combustible or toxic gases heavier than air, the detector should be installed 0.3m to 0.6m above the ground (or floor level); when detecting combustible or toxic gases lighter than air, the detector should be installed within 2.0m above the release source; when detecting toxic gases with molecular weights close to air and easily mixed with air (such as carbon monoxide and hydrogen cyanide), the detector should be installed within 1m above or below the release source; the installation height of the ambient oxygen detector should be 1.5m to 2.0m above the ground or floor."

[0003] Chinese Patent No. CN222302203U discloses a wiring structure for a gas detector, including a gas detector. A display is mounted in the middle of the gas detector. A mounting groove is provided on one side of the upper end of the gas detector, and a cover plate is provided at the upper end of the mounting groove. One end of the cover plate is mounted on one side of the mounting groove via a pivot. A conductive slot is installed inside one side of the mounting groove. A wire is provided on the outside of the gas detector, and a conductive plug is installed at the front end of the wire. The conductive plug extends into the mounting groove and inserts into the conductive slot. This detector conforms to the characteristics of a single gas detector. However, due to the different types of gases, the detection height between the gas and the gas detector is also different, causing a multi-gas detector to fail to meet its requirements. Furthermore, multiple single gas detectors are needed to meet the requirements, resulting in high costs. Therefore, an integrated gas detector is proposed to solve the above-mentioned problems. Utility Model Content

[0004] To address the aforementioned problems, this invention proposes an integrated gas detector, which effectively solves the issue that existing gas detectors are not suitable for detecting different gases or gases at different altitudes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an integrated gas detector, including a display, a unit connector is provided below the display, and a plurality of gas detection units are provided below the unit connector for detecting different gases. Each gas detection unit includes a sliding ring and a mounting shell. The mounting shell is elastically sleeved on the sliding ring, and a positioning bead is provided on the sliding ring. The movement of the sliding ring drives the positioning bead to move so as to install the mounting shell on the unit connector.

[0006] The mounting housing is provided with a filter unit, which includes a filter screen and a cylinder with openings at both ends. The filter screen is installed inside the cylinder. The upper end of the cylinder is inserted into the lower end of the sliding ring through a positioning device. A striking unit is provided between the cylinder and the sliding ring. The sliding ring drives the cylinder to rotate, causing the striking unit to vibrate the filter unit.

[0007] Furthermore, the unit connector is a flexible hose, and the unit connector has an output end and several input ends. The number of input ends corresponds one-to-one with the number of mounting parts, and the mounting parts are equipped with mounting brackets.

[0008] Furthermore, a mounting component is fixedly connected to the lower part of the unit connector. The mounting component has multiple positioning grooves in its circumference. The mounting shell has multiple radial positioning holes. Positioning beads that are compatible with the positioning grooves are slidably arranged in the radial direction inside the radial positioning holes. A sliding ring is sleeved on the outer side of the mounting component. A first mounting groove is opened on the inner side of the sliding ring. A second mounting groove is opened on the outer wall of the mounting shell. A first elastic element is installed between the second mounting groove and the first mounting groove.

[0009] Furthermore, the diameter of the openings at both ends of the radial positioning hole is smaller than the diameter of the positioning bead.

[0010] Furthermore, the cylinder includes an outer cylinder and an inner cylinder, a threaded ring is installed inside the cylinder, the lower end of the outer cylinder is connected to the lower end of the inner cylinder, and the filter screen is located between the first convex ring and the threaded ring and installed inside the inner cylinder.

[0011] Furthermore, the cylinder is provided with a plurality of paddles arranged in a ring array inside, and a receiving groove is provided on the lower outer side of the mounting shell. The striking unit is located in the receiving groove and is used in conjunction with the paddles.

[0012] Furthermore, the striking unit includes a support rod fixedly connected to the mounting shell, a second elastic element is sleeved on the support rod, and a striking head is fixedly connected to one end of the second elastic element. The striking head is used in conjunction with the paddle plate and contacts the inner wall of the cylinder.

[0013] Furthermore, the positioning device includes multiple positioning plates fixedly connected to the upper end of the outer wall of the outer cylinder in a circular array. The sliding ring has a receiving groove located below the first mounting groove. The outer cylinder corresponds to the receiving groove. The sliding ring has a guide groove corresponding to the positioning plate.

[0014] Furthermore, there is a gap between the cylinder and the mounting shell, the cylinder is U-shaped, and the cylinder is a metal part.

[0015] Furthermore, the mounting bracket includes a fixing part and a mounting part, the mounting part being fixedly connected to the fixing part and combined in an L-shape, and the fixing part having a first mounting hole.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This utility model, through the setting of the mounting bracket, can install several gas detection units at different heights on the wall, which can realize the flexible placement of several gas detection units and meet the needs of simultaneous detection of gases with different specific gravities. At the same time, multiple gas detection units share one display, which solves the problem of needing to use multiple single gas detectors and the inability of composite multi-gas detectors to meet the requirements, thus greatly reducing the cost.

[0018] 2. This utility model achieves the snap-fit ​​connection between the detector and the display through the cooperation of the sliding ring, the mounting part, the mounting shell and the positioning bead, which replaces the cumbersome common threaded connection method. In addition, the rotation of the sliding ring drives the cylinder to rotate, so that the vibration of the striking unit is transmitted to the filter screen and cleans the dust particles on the filter screen. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the prior art gas detector of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the gas detector of this utility model;

[0021] Figure 3 This is a cross-sectional structural diagram of the mounting shell of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the mounting shell of this utility model;

[0023] Figure 5 This utility model Figure 2 Enlarged schematic diagram of the structure at point A;

[0024] Figure 6 This is a schematic diagram of the striking unit of this utility model;

[0025] Figure 7 This utility model Figure 2 Enlarged structural diagram at point B;

[0026] Figure 8 This is a schematic diagram of the structure of the cylinder of this utility model;

[0027] Figure 9 This is a schematic diagram of the structure of the sliding ring of this utility model;

[0028] Figure 10 This is a cross-sectional structural diagram of the sliding ring of this utility model;

[0029] Figure 11 This is a schematic diagram of the structure of the mounting bracket of this utility model;

[0030] Figure 12 This is a schematic diagram of the installation component of this utility model.

[0031] In the diagram: 1. Display; 2. Installation piping; 3. Unit connector; 4. Mounting component; 5. Sliding ring; 6. Filter unit; 7. Mounting housing; 8. Sensor; 9. Mounting bracket; 41. Positioning groove; 42. Positioning block; 51. First mounting groove; 52. Receiving groove; 53. Guide groove; 61. Filter screen; 62. Cylinder; 63. Threaded ring; 64. Dial plate; 65. Positioning plate; 621. Outer cylinder; 622. Inner cylinder; 623. First convex ring; 624. Second convex ring; 71. Positioning bead; 72. Receiving groove; 73. Positioning ring; 74. Radial positioning hole; 75. Second mounting groove; 76. First elastic element; 77. Striking unit; 771. Support rod; 772. Second elastic element; 773. Striking head; 91. Fixing part; 92. Mounting part. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] like Figures 2 to 11As shown, this utility model provides an integrated gas detector, including a display 1. An installation pipe 2 is installed at the lower end of the display 1. A unit connector 3 is fixedly installed at the lower end of the installation pipe 2. Several gas detection units are set below the unit connector 3 by a snap-fit ​​method. The several gas detection units can be combustible gas detection units (such as hydrogen, acetylene, ethylene, ammonia, hydrogen sulfide, etc.) and toxic gas detection units (such as chlorine, ammonia, nitrogen oxides, phosgene, hydrogen fluoride, sulfur dioxide, sulfur trioxide, and dimethyl sulfate, etc.). A filter unit 6 is provided on the gas detection unit to filter out external dust and debris.

[0034] like Figure 1 and Figure 8 As shown, the unit connector 3 is a flexible hose. The unit connector 3 has one output end and several input ends. The number of input ends corresponds one-to-one with the number of mounting parts 4. The mounting parts 4 are equipped with mounting brackets 9. The mounting parts 4 are fixed to the wall by the mounting brackets 9, which facilitates the gas detection unit to detect different types of gases at different heights. The mounting bracket 9 includes a fixing part 91 and a mounting part 92. The mounting part 92 is fixedly connected to the fixing part 91 and the combination is L-shaped. The fixing part 91 has a first mounting hole. The fixing part 91 is fixed to the wall by bolts passing through the first mounting hole. The mounting part 92 has a second mounting hole. The mounting parts 4 are fixed to the mounting part 92 by the second mounting hole and the bolts.

[0035] In the above solution, the mounting bracket 9 allows several gas detection units to be installed at different heights on the wall, enabling flexible placement of the gas detection units and meeting the simultaneous detection requirements of gases with different specific gravities. At the same time, multiple gas detection units share one display 1, solving the problem of needing to use multiple single gas detectors and the inability of composite multi-gas detectors to meet the requirements, thus significantly reducing costs.

[0036] A mounting component 4 is fixedly connected to the lower part of the unit connector 3. The mounting component 4 has multiple positioning grooves 41 circumferentially. The gas detection unit includes a sliding ring 5 and a mounting shell 7. The mounting shell 7 is fitted onto the lower outer part of the mounting component 4. A positioning ring 73 is fixedly connected to the lower end of the mounting shell 7. A sensor 8 is fixedly installed inside the mounting shell 7 between the positioning ring 73 and the mounting component 4. The sensor 8 is electrically connected to the display 1 through the unit connector 3. The cooperation between the positioning ring 73 and the mounting component 4 can fix the position of the sensor 8. Multiple radial positioning holes 74 are evenly arranged circumferentially on the mounting shell 7. The interior of each radial positioning hole 74 slides radially and interacts with the positioning grooves 41. The diameter of the two ends of the radial positioning hole 74 is smaller than that of the positioning bead 71 to prevent the positioning bead 71 from detaching from the radial positioning hole 74. A sliding ring 5 is sleeved on the outer side of the mounting part 4. The sliding ring 5 is used in conjunction with the mounting shell 7, and the mounting shell 7 can slide up and down along the sliding ring 5. A first elastic element 76 is provided between the sliding ring 5 and the outer surface of the mounting part 4 to drive the sliding ring 5 to move axially. A first mounting groove 51 is opened in the middle of the inner wall of the sliding ring 5, and a second mounting groove 75 is opened in the outer wall of the mounting shell 7. The second mounting groove 75 and the first mounting groove 51 are combined to form a receiving cavity for the first elastic element 76. The first elastic element 76 can be a spring.

[0037] In the above scheme, before the sensor 8 is installed on the mounting part 4, the sliding ring 5 is manually moved downward so that the inner wall of the upper end of the sliding ring 5 is lower than the positioning bead 71. At this time, the sliding ring 5 no longer presses the outer end of the positioning bead 71, that is, the position limitation of the positioning bead 71 is released. At this time, the first elastic element 76 is compressed by force. After the mounting part 4 enters into the sliding ring 5, the sliding ring 5 is released. Under the action of the first elastic element 76, the sliding ring 5 moves upward and contacts the positioning bead 71 again, and pushes the positioning bead 71 to move into the positioning groove 41, so that the positioning bead 71 limits the position of the mounting part 4, thereby realizing the snap-fit ​​between the sensor 8 and the display 1, replacing the cumbersome situation of the common threaded connection method.

[0038] like Figure 3 and Figure 12 As shown, in order to limit the position between the mounting component 4 and the mounting shell 7 after installation, in this embodiment, two symmetrically arranged positioning blocks 42 are provided at the lower end of the outer side wall of the mounting component 4, and two limiting grooves are provided on the inner side wall of the mounting shell 7 symmetrically arranged along the length direction of the mounting shell 7. The positioning blocks 42 correspond to the limiting grooves. Before the mounting component 4 is installed on the shell 7, the positioning blocks 42 and the limiting grooves cooperate to realize the positional correspondence between the positioning bead 71 and the positioning groove 41, so as to avoid the misalignment between the positioning bead 71 and the positioning groove 41, which would prevent the mounting shell 7 from being installed on the mounting component 4. The lower end of the positioning block 42 has a chamfer so that the positioning block 42 can quickly enter into the limiting groove.

[0039] likeFigures 3 to 8 As shown, the filter unit 6 includes a filter screen 61 and a cylinder 62 open at both ends. A threaded ring 63 is installed inside the cylinder 62. To facilitate the installation or removal of the threaded ring 63, an annular protrusion is provided on the lower side of the outer wall of the threaded ring 63 for easy gripping by the user. The filter screen 61 is mounted on the cylinder 62 via the threaded ring 63. The cylinder 62 is rotatably mounted on the inner wall of the mounting housing 7. The cylinder 62 includes an outer cylinder 621 and an inner cylinder 622. The lower ends of the outer cylinder 621 and the inner cylinder 622 are connected and integrally formed. The inner wall of the inner cylinder 622 has internal threads. The outer side of the threaded ring 63... The sidewall has external threads, and the outer sidewall of the threaded ring 63 is threadedly connected to the inner sidewall of the inner cylinder 622. The inner side of the upper end of the inner cylinder 622 is provided with a first convex ring 623. The filter screen 61 is located between the first convex ring 623 and the threaded ring 63 and is installed inside the inner cylinder 622. The diameter of the filter screen 61 is adapted to the inner diameter of the inner cylinder 622. The upper outer end of the inner cylinder 622 is provided with a second convex ring 624. The inner sidewall of the mounting shell 7 is provided with an annular groove adapted to the second convex ring 624. The inner cylinder 622 is engaged in the mounting shell 7 through the second convex ring 624 and the corresponding annular groove and is rotatably connected to the mounting shell 7.

[0040] In the above scheme, when the filter screen 61 needs to be installed, the filter screen 61 is first placed into the inner cylinder 622 from bottom to top, and then the threaded ring 63 is screwed into the inner cylinder 622 to fix the position of the filter screen 61. When the filter screen 61 is replaced, the filter screen 61 can be removed by rotating the threaded ring 63.

[0041] The upper end of the cylinder 62 is inserted into the lower end of the sliding ring 5 via a positioning device, thereby achieving synchronous rotation. The inner wall of the outer cylinder 621 is provided with multiple paddles 64 arranged in a ring. The lower outer side of the mounting shell 7 is provided with a receiving groove 72. Two symmetrically arranged striking units 77 are provided on both sides of the receiving groove 72. After the striking units 77 and the paddles 64 work together, they generate vibrations that are transmitted to the filter screen 61, thereby treating the dust particles on the filter screen 61. There is a gap between the cylinder 62 and the mounting shell 7, which can reduce the phenomenon of vibration transmission from the cylinder 62 to the mounting shell 7. The cylinder 62 is a metal part, which can improve the vibration transmission effect of the striking units 77 on the cylinder 62.

[0042] like Figures 4 to 6 As shown, in order to clean the dust particles on the filter screen 61 through vibration and avoid the dust particles on the filter screen 61 causing a decrease in the detection accuracy of the sensor 8, in this embodiment, the striking unit 77 includes a support rod 771 whose inner end is fixedly connected to the outer wall of the mounting shell 7. The outer end of the support rod 771 is provided with a second elastic element 772, which can be a spring. The outer end of the second elastic element 772 is fixedly connected with a striking head 773, which is a metal head. The striking head 773 is used in conjunction with the dial plate 64 and contacts the inner wall of the outer cylinder 621.

[0043] like Figure 8 and Figure 9 As shown, to avoid the cylinder 62 affecting the movement of the sliding ring 5 when it descends, the positioning device in this embodiment includes multiple positioning plates 65 evenly arranged on the upper end of the outer wall of the outer cylinder 621 along the circumference. The sliding ring 5 has a receiving groove 52 located below the first mounting groove 51. The receiving groove 52 is provided to provide a receiving space between the outer cylinder 621 and the mounting shell 7. The outer cylinder 621 corresponds to the receiving groove 52. The sliding ring 5 has a guide groove 53 corresponding to the positioning plate 65. The multiple positioning plates 65 on the outer wall of the outer cylinder 621 are respectively located in the corresponding guide groove 53. The cooperation between the guide groove 53 and the positioning plate 65 can enable the cylinder 62 to rotate synchronously with the sliding ring 5 during its rotation. In the initial state, before cleaning the filter screen 61, the positioning plate 65 is located at the lower end of the guide groove 53 on the sliding ring 5, so that there is still a movement space in the guide groove 53 above the positioning plate 65, so as to avoid the outer cylinder 621 being blocked and unable to move when the sliding ring 5 descends.

[0044] In the above solution, after a period of use, dust particles will accumulate on the filter screen 61. When cleaning, simply rotate the sliding ring 5. With the cooperation of the positioning plate 65 and the guide groove 53, the sliding ring 5 drives the deflector 64 on the outer cylinder 621 to rotate. The deflector 64 contacts the striking head 773, causing the second elastic element 772 to bend. After the striking head 773 moves past the deflector 64, the second elastic element 772 causes the striking head 773 to contact the outer cylinder 621, forming a striking effect and generating vibration. The vibration is transmitted to the filter screen 61 through the outer cylinder 621 and the inner cylinder 622, thus cleaning the dust particles on it and increasing the service life of the filter screen 61.

[0045] Working principle of this utility model:

[0046] After the mounting bracket 9 fixes the mounting piece 4 to the preset position on the wall, the sliding ring 5 is moved downwards to release the position restriction of the positioning bead 71. At the same time, the sliding ring 5 compresses the first elastic element 76. Then, the sliding ring 5 is placed on the mounting piece 4. At this time, the sliding ring 5 is released, and the first elastic element 76 is reset, causing the sliding ring 5 to move upwards and push the positioning bead 71. The positioning bead 71 moves toward the mounting piece 4 and enters the positioning groove 41, thereby restricting the position of the mounting piece 4. At the same time, the mounting piece 4 and the positioning ring 73 fix the position of the sensor 8.

[0047] After the sensor 8 has been used for a period of time, dust particles in the air will come into contact with the filter screen 61 through the detection port of the mounting shell 7, resulting in too many dust particles on the filter screen 61, which affects the detection accuracy of the sensor 8. By rotating the sliding ring 5, the sliding ring 5 rotates and drives the cylinder 62 to rotate. The deflector 64 on the outer cylinder 621 comes into contact with the striking head 773. The deflector 64 causes the second elastic element 772 on the striking head 773 to bend and deform. When the striking head 773 breaks through the deflector 64, the second elastic element 772 resets and causes the striking head 773 to strike the inner wall of the outer cylinder 621 to generate vibration. The vibration is transmitted to the filter screen 61 through the outer cylinder 621 and the inner cylinder 622. The filter screen 61 is cleaned of dust particles by the force of the vibration.

[0048] When disassembling the filter screen 61, simply rotate the threaded ring 63 to remove the filter screen 61 for replacement or further cleaning.

[0049] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An integrated gas detector, comprising a display (1), characterized in that: Below the display (1) is a unit connector (3), and below the unit connector (3) are several gas detection units for detecting different gases. Each gas detection unit includes a sliding ring (5) and a mounting shell (7). The mounting shell (7) is fitted onto the sliding ring (5). The sliding ring (5) is provided with a positioning bead (71). The movement of the sliding ring (5) drives the positioning bead (71) to move so as to install the mounting shell (7) onto the unit connector (3). A filter unit (6) is provided on the mounting shell (7). The filter unit (6) includes a filter screen (61) and a cylinder (62) with openings at both ends. The filter screen (61) is installed inside the cylinder (62). The upper end of the cylinder (62) is inserted into the lower end of the sliding ring (5) through a positioning device. A striking unit (77) is provided between the cylinder (62) and the sliding ring (5). The sliding ring (5) drives the cylinder (62) to rotate, causing the striking unit (77) to vibrate the filter unit (6).

2. The integrated gas detector according to claim 1, characterized in that: The unit connector (3) is a flexible tube. The unit connector (3) has an output end and several access ends. The number of access ends corresponds one-to-one with the number of mounting parts (4). The mounting parts (4) are equipped with mounting brackets (9).

3. The integrated gas detector according to claim 2, characterized in that: A mounting component (4) is fixedly connected to the lower part of the unit connector (3). The mounting component (4) has multiple positioning grooves (41) in the circumferential direction. The mounting shell (7) has multiple radial positioning holes (74). The interior of the radial positioning holes (74) is slidably provided with positioning beads (71) that are compatible with the positioning grooves (41). A sliding ring (5) is sleeved on the outer side of the mounting component (4). A first mounting groove (51) is provided on the inner side of the sliding ring (5). A second mounting groove (75) is provided on the outer side wall of the mounting shell (7). A first elastic element (76) is installed between the second mounting groove (75) and the first mounting groove (51).

4. The integrated gas detector according to claim 3, characterized in that: The diameter of the openings at both ends of the radial positioning hole (74) is smaller than the diameter of the positioning bead (71).

5. The integrated gas detector according to claim 1, characterized in that: The cylinder (62) includes an outer cylinder (621) and an inner cylinder (622). A threaded ring (63) is installed inside the cylinder (62). The lower end of the outer cylinder (621) is connected to the lower end of the inner cylinder (622). The filter screen (61) is located between the first convex ring and the threaded ring (63) and is installed inside the inner cylinder (622).

6. The integrated gas detector according to claim 3, characterized in that: The cylinder (62) has a plurality of paddles (64) arranged in a ring array inside. The lower outer side of the mounting shell (7) has a receiving groove (72). The striking unit (77) is located in the receiving groove (72). The striking unit (77) works in conjunction with the paddles (64).

7. The integrated gas detector according to claim 1, characterized in that: The striking unit (77) includes a support rod (771) fixedly connected to the mounting shell (7), a second elastic element (772) is sleeved on the support rod (771), and a striking head (773) is fixedly connected to one end of the second elastic element (772). The striking head (773) is used in conjunction with the dial plate (64) and contacts the inner wall of the cylinder (62).

8. The integrated gas detector according to claim 6, characterized in that: The positioning device includes multiple positioning plates (65) fixedly connected to the upper end of the outer wall of the outer cylinder (621) in a ring array. The sliding ring (5) has a receiving groove (52) located below the first mounting groove (51). The outer cylinder (621) corresponds to the receiving groove (52). The sliding ring (5) has a guide groove (53) corresponding to the positioning plate (65).

9. The integrated gas detector according to claim 7, characterized in that: There is a gap between the cylinder (62) and the mounting shell (7), the cylinder (62) is U-shaped, and the cylinder (62) is a metal part.

10. The integrated gas detector according to claim 2, characterized in that: The mounting bracket (9) includes a fixing part (91) and a mounting part (92). The mounting part (92) is fixedly connected to the fixing part (91) and is arranged in an L-shape. The fixing part (91) has a first mounting hole.

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