Underground valve well laser methane alarm

Abstract

The utility model discloses an underground valve well laser methane alarm, and relates to the field of methane alarms, a plurality of groups of fixing sleeves are fixed on the side wall of an upper shell, accommodating sleeves matched with the fixing sleeves for use are fixed on the side wall of a lower shell, two limiting grooves are symmetrically formed in each fixing sleeve, a connecting rod is arranged in each fixing sleeve, and the limiting grooves are matched with the connecting rods. A sliding sleeve is arranged on the connecting rod in a sliding mode, the sliding sleeve is arranged between the fixing sleeve and the connecting rod, a fixing plate is fixed to one end of the connecting rod, a bearing plate is fixed to the other end of the connecting rod, and the end, away from the connecting rod, of the fixing plate is fixed to the upper shell. The device has the advantages that under mutual cooperation of the pressing structure, the sliding sleeve and the unfolding structure, the distance between the first hinge rod and the second hinge rod is changed, then the unfolding plate is driven to expand or contract, disassembly and assembly of the alarm shell are rapidly achieved, the maintenance time of maintenance personnel in an underground valve well is shortened, and the maintenance efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of methane alarm, in particular to a kind of underground valve well laser methane alarm. BACKGROUND

[0002] In urban underground pipe network system, valve well is the key node of gas transmission, and its safety is related to urban energy supply and the safety of life and property of residents.The environment in valve well is complex, and the risk of methane leakage is high.Once leakage is not found in time, serious accidents such as explosion and fire are easy to occur.Underground valve well laser methane alarm is thus born, and becomes an important equipment to protect urban gas safety.

[0003] When underground valve well laser methane alarm works, laser methane detection device emits laser beam of specific wavelength.When laser meets methane in underground valve well, the intensity changes due to the absorption of energy by methane, and the change is converted into electrical signal by detection device and transmitted to control unit.The control unit calculates the concentration of methane, and generates alarm signal if it exceeds the preset threshold.The signal is transmitted to remote monitoring center through signal receiver, so that staff can know the situation of methane leakage in time.

[0004] When laser methane alarm needs to be repaired, maintenance personnel need to open the manhole cover for ventilation, take protection measures, and detect the environment in the well if necessary, and then work in the well after confirming safety.The existing laser methane alarm shell is fixed by two half shells through bolts, and maintenance personnel need to unscrew the bolts one by one, which is complicated, time-consuming and labor-intensive, seriously affects the maintenance efficiency, and is difficult to meet the demand of rapid maintenance. CONTENT OF THE INVENTION

[0005] In order to solve the problem that maintenance personnel need to unscrew the bolts fixed on the shell one by one after going down to the valve well, and then repair the methane alarm, which is time-consuming and labor-intensive, the present application provides a kind of underground valve well laser methane alarm.

[0006] The underground valve well laser methane alarm provided by the present application adopts the following technical scheme:

[0007] The underground valve well laser methane alarm comprises an upper shell and a lower shell, a plurality of fixing sleeves are fixed on the side wall of the upper shell, a containing sleeve matched with the fixing sleeve is fixed on the side wall of the lower shell, two limiting grooves are symmetrically formed on the fixing sleeve, a connecting rod is arranged in the fixing sleeve, a sliding sleeve is slidably arranged on the connecting rod, the sliding sleeve is arranged between the fixing sleeve and the connecting rod, a fixing plate is fixed on one end of the connecting rod, a receiving plate is fixed on the other end of the connecting rod, the end of the fixing plate away from the connecting rod is fixed on the upper shell, a pressing mechanism matched with the limiting groove and limiting the sliding of the sliding sleeve on the fixing sleeve is arranged on the sliding sleeve, and a unfolding mechanism for limiting the disengagement of the upper shell and the lower shell is arranged between the sliding sleeve and the receiving plate.

[0008] By adopting the above technical solution, the alarm housing can be quickly disassembled and assembled through the combined action of the fixing sleeve, the receiving sleeve, the pressing mechanism, and the unfolding mechanism. Compared with the traditional bolt connection method, this simplifies the opening and closing operation process of the methane alarm housing, significantly reduces the workload of maintenance personnel, and improves equipment maintenance efficiency.

[0009] Optionally, the pressing mechanism includes two sets of pressing structures, which are symmetrically arranged on the sliding sleeve. Each pressing structure includes a receiving groove formed on the sliding sleeve, a spring fixed in the receiving groove, a pressing rod sliding in the receiving groove, and a spring set in the receiving groove to reset the pressing rod. The end of the pressing rod away from the spring is rounded.

[0010] By employing the above technical solution, when the alarm housing needs to be disassembled, pressure is applied to the push rod, causing it to slide into the receiving groove, thereby compressing the spring and deforming it. This, in turn, pushes the sliding sleeve vertically along the connecting rod, causing the receiving groove, the spring inside the groove, and the push rod to move synchronously. When the receiving groove moves upward to engage with the limiting groove on the fixed sleeve, the spring's reset action pushes the push rod back to its initial position, thus limiting the downward movement of the sliding sleeve. When the sliding sleeve moves downward to contact the fixed plate, the receiving groove is now above the fixed sleeve, and the spring's reset action pushes the push rod back to its initial position, thus limiting the upward movement of the sliding sleeve.

[0011] Optionally, the unfolding mechanism includes multiple sets of unfolding components, which are evenly spaced between the sliding sleeve and the receiving plate. Each unfolding component includes an unfolding plate disposed below the sliding sleeve, a first hinge rod fixed to the sliding sleeve, and a second hinge rod fixed to the receiving plate. One end of the first hinge rod is fixed to the sliding sleeve, and the other end of the first hinge rod is fixed to the unfolding plate. One end of the second hinge rod is fixed to the receiving plate, and the other end of the second hinge rod is fixed to the unfolding plate. The inner wall of the receiving sleeve is provided with a receiving cavity for restricting the vertical displacement of the unfolded plate after unfolding.

[0012] By adopting the above technical solution, as the relative position between the sliding sleeve and the receiving plate changes, the distance between the first hinge rod and the second hinge rod also changes, thereby driving the unfolding plate to retract and expand. When the unfolding plate expands, it can press against the fixed sleeve, thus securing the alarm housing. When the unfolding plate retracts, it loses its pressing effect on the fixed sleeve, allowing the alarm housing to be easily removed.

[0013] Optionally, a protrusion is fixed on the side of the upper shell facing the lower shell, and a groove for accommodating the protrusion is formed on the side of the lower shell facing the upper shell.

[0014] By adopting the above technical solution, the cooperation between the protrusion and the groove enables precise positioning between the upper and lower shells, ensuring rapid alignment during assembly and reducing assembly time. Simultaneously, the cooperation between the protrusion and the groove also enhances the stability of the connection, preventing misalignment of the shells due to external forces.

[0015] Optionally, a sealing ring is provided inside the groove.

[0016] By adopting the above technical solution, the sealing ring can effectively improve the sealing performance of the connection between the upper and lower shells, preventing external impurities or liquids from entering the alarm.

[0017] Optionally, a plurality of heat dissipation strips are fixed on the side of the upper shell away from the lower shell, and the plurality of heat dissipation strips are used to increase the heat dissipation area of ​​the upper shell.

[0018] By adopting the above technical solution, multiple heat dissipation strips can effectively increase the heat dissipation area of ​​the upper shell, thereby improving the heat dissipation efficiency of the underground valve well laser methane alarm during operation and ensuring the stability and reliability of the equipment in high-temperature environments.

[0019] Optionally, the side wall of the fixing sleeve has two pressing grooves, which are arranged symmetrically.

[0020] By adopting the above technical solution, two pressing grooves are symmetrically opened on the side wall of the fixed sleeve, which can provide maintenance personnel with a more convenient point of force application, making it easier for maintenance personnel to press the pressing rod in the limiting groove.

[0021] Optionally, the side of the fixing plate away from the upper shell is rounded.

[0022] By adopting the above technical solution, the rounded treatment on the side of the fixing plate away from the upper shell can reduce the risk of scratches to the operator's hands during installation or disassembly, and improve operational safety.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. Place the upper and lower shells correspondingly, press the pressing rod into the receiving groove, and then push the sliding sleeve in the vertical direction to slide on the connecting rod, so that the distance between the first hinge rod and the second hinge rod changes, thereby causing the unfolding plate to contract or expand, thus quickly completing the disassembly and assembly of the alarm shell;

[0025] 2. With the cooperation of the protrusion and the groove, when the upper and lower shells are close together, the protrusion is embedded in the groove, which plays a role in positioning and guiding the upper and lower shells. The cooperation of the protrusion and the groove can also enhance the stability of the connection and prevent the shells from being misaligned due to external forces. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is an overall schematic diagram of the methane alarm housing provided in the embodiments of this application;

[0028] Figure 2 This is an overall schematic diagram of the methane alarm housing provided in the embodiments of this application from another perspective;

[0029] Figure 3 This is provided in the embodiments of this application. Figure 2 Enlarged view of point A in the middle;

[0030] Figure 4 This is a cross-sectional view of the receiving sleeve provided in the embodiment of this application;

[0031] Figure 5 This is a schematic diagram of the structure of the fixing sleeve provided in the embodiment of this application, used to show the limiting groove and the pressing groove;

[0032] Figure 6 This is a cross-sectional view of the sliding sleeve provided in the embodiment of this application, used to illustrate the pressing mechanism;

[0033] Figure 7 This is a schematic diagram of the structure of the unfolding component provided in the embodiments of this application;

[0034] Figure 8 This is a vertically split view of the housing provided in the embodiments of this application, used to show the protrusion, groove and sealing ring.

[0035] Reference numerals: 1. Upper shell; 2. Lower shell; 3. Fixed sleeve; 4. Receiving sleeve; 5. Limiting groove; 6. Connecting rod; 7. Sliding sleeve; 8. Fixed plate; 9. Supporting plate; 10. Pressing mechanism; 11. Pressing structure; 1101. Receiving groove; 1102. Spring; 1103. Pressing rod; 12. Unfolding mechanism; 13. Unfolding assembly; 1301. Unfolding plate; 1302. First hinge rod; 1303. Second hinge rod; 14. Protrusion; 15. Groove; 16. Sealing ring; 17. Receiving cavity; 18. Heat dissipation strip; 19. Pressing groove. Detailed Implementation

[0036] The following is in conjunction with the appendix Figures 1-8 This application will be described in further detail.

[0037] This application discloses a laser methane alarm for underground valve wells.

[0038] Reference Figure 1 A laser methane alarm for underground valve wells includes an upper shell 1 and a lower shell 2. Multiple heat dissipation strips 18 are fixed on the side of the upper shell 1 away from the lower shell 2. The multiple heat dissipation strips 18 are used to increase the heat dissipation area of ​​the upper shell 1, thereby improving the heat dissipation efficiency of the laser methane alarm for underground valve wells during operation.

[0039] Reference Figure 2 Multiple sets of fixing sleeves 3 are fixed on the side wall of the upper shell 1, and multiple sets of receiving sleeves 4 are fixed on the side wall of the lower shell 2. The multiple sets of fixing sleeves 3 are all arranged above the receiving sleeves 4. In this embodiment, both the fixing sleeves 3 and the receiving sleeves 4 are set to three sets.

[0040] Reference Figure 3 and Figure 4 A fixing plate 8 is fixed to the upper shell 1. To reduce the risk of scratches to the operator's hands during disassembly and assembly, the side of the fixing plate 8 away from the upper shell 1 is rounded to improve operational safety. A connecting rod 6 is fixed to one side of the fixing plate 8. A sliding sleeve 7 is provided between the connecting rod 6 and the fixing sleeve 3, and the sliding sleeve 7 can slide on the connecting rod 6. A receiving plate 9 is fixed to the bottom end of the connecting rod 6. A pressing mechanism 10 is provided on the sliding sleeve 7. An unfolding mechanism 12 is provided between the sliding sleeve 7 and the receiving plate 9.

[0041] Reference Figure 4 The receiving cavity 17 inside the receiving sleeve 4 is divided into upper and lower parts. The inner diameter of the lower part is larger than that of the upper part, which is used to limit the vertical displacement of the unfolding mechanism 12 after unfolding. The inner diameter of the upper part is the same as that of the sliding sleeve 7, so that the sliding sleeve 7 can move inside the receiving sleeve 4.

[0042] Reference Figure 5 Two limiting grooves 5 are provided on the fixed sleeve 3. The two limiting grooves 5 are symmetrically provided on the side wall of the fixed sleeve 3, and the diameter of the limiting grooves 5 is the same as the diameter of the pressing rod 1103. Two pressing grooves 19 are provided on the side wall of the fixed sleeve 3. The two pressing grooves 19 are symmetrically provided, and the inner wall of the pressing grooves 19 fits against the pressing rod 1103, so that maintenance personnel can directly put their fingers into the symmetrically provided pressing grooves 19 on the side wall of the fixed sleeve 3.

[0043] Reference Figure 6The pressing mechanism 10 includes two sets of pressing structures 11, which are symmetrically arranged on the sliding sleeve 7. Each pressing structure 11 includes a receiving groove 1101, a spring 1102, and a pressing rod 1103, with the end of the pressing rod 1103 away from the spring 1102 rounded. The receiving groove 1101 is formed on the sliding sleeve 7, and the diameter of the pressing rod 1103 is the same as the diameter of the receiving groove 1101. One end of the spring 1102 is fixed to the inner wall of the receiving groove 1101, and the other end is fixed to the pressing rod 1103; therefore, movement of the pressing rod 1103 can deform the spring 1102.

[0044] Reference Figure 4 , Figure 5 and Figure 6 When the alarm needs maintenance and the alarm housing needs to be disassembled, the pressing rod 1103 is located in the limiting groove 5 of the fixed sleeve 3. Maintenance personnel can directly place their fingers into the symmetrically opened pressing grooves 19 on the side wall of the fixed sleeve 3 to apply external force to the pressing rod 1103, pressing it into the receiving groove 1101. The sliding sleeve 7 is then pushed vertically onto the connecting rod 6. When the sliding sleeve 7 moves upward to contact the fixed plate 8, the receiving groove 1101 is now above the fixed sleeve 3. Under the reset action of the spring 1102, the pressing rod 1103 is pushed back to its original position, now above the fixed sleeve 3, thus triggering the unfolding mechanism 12 to perform the corresponding action.

[0045] Reference Figure 4 , Figure 5 and Figure 6 When the alarm housing needs to be installed after maintenance, first place the upper housing 1 and the outer housing accordingly, with the pressing rod 1103 above the fixed sleeve 3. Apply pressure to the pressing rod 1103, causing it to slide into the receiving groove 1101, compressing the spring 1102 and deforming it. This pushes the sliding sleeve 7 vertically downwards onto the connecting rod 6, thereby causing the receiving groove 1101 and the spring 1102 and pressing rod 1103 inside the receiving groove 1101 to move synchronously. When the receiving groove 1101 on the sliding sleeve 7 moves downwards to engage with the limiting groove 5 on the fixed sleeve 3, the restoring action of the spring 1102 pushes the pressing rod 1103 outwards, causing the pressing rod 1103 to pass through the limiting groove 5, thus limiting the sliding sleeve 7 from moving further downwards, thereby triggering the unfolding mechanism 12 to perform the corresponding action.

[0046] Reference Figure 7The unfolding mechanism 12 includes multiple sets of unfolding components 13, which are evenly spaced between the sliding sleeve 7 and the receiving plate 9. In this embodiment, three sets of unfolding components 13 are provided. Each unfolding component 13 includes an unfolding plate 1301, a first hinge rod 1302, and a second hinge rod 1303. The unfolding plate 1301 is positioned between the sliding sleeve 7 and the receiving plate 9, and the side of the unfolding plate 1301 facing away from the connecting rod 6 has an arc-shaped design, allowing it to better fit against the inner wall of the receiving sleeve 4. One end of the first hinge rod 1302 is fixed to the sliding sleeve 7, and the other end is fixed to the unfolding plate 1301. One end of the second hinge rod 1303 is fixed to the receiving plate 9, and the other end is fixed to the unfolding plate 1301.

[0047] Reference Figure 4 , Figure 6 and Figure 7 When it is necessary to disassemble the alarm housing, by operating the pressing mechanism 10, the sliding sleeve 7 is pushed vertically upward on the connecting rod 6, thereby increasing the distance between the sliding sleeve 7 and the receiving plate 9, and consequently increasing the distance between the first hinge rod 1302 and the second hinge rod 1303. At this time, under the action of the first hinge rod 1302 and the second hinge rod 1303, the unfolding plate 1301 is driven to retract. After retraction, the unfolding plate 1301 loses its clamping effect on the fixed sleeve 3, thus easily disassembling the alarm housing.

[0048] Reference Figure 4 , Figure 6 and Figure 7 When the alarm housing needs to be installed, the pressing mechanism 10 is operated, and the sliding sleeve 7 is pushed down the connecting rod 6 in the vertical direction, reducing the distance between the sliding sleeve 7 and the receiving plate 9, and consequently reducing the distance between the first hinge rod 1302 and the second hinge rod 1303. At this time, under the action of the first hinge rod 1302 and the second hinge rod 1303, the unfolding plate 1301 is driven to expand. The expanded unfolding plate 1301 can press against the fixed sleeve 3, thereby allowing the alarm housing to be installed.

[0049] Reference Figure 8To further improve sealing, a protrusion 14 is fixed on the downward-facing side of the upper shell 1, and a groove 15 is formed on the side of the lower shell 2 facing the upper shell 1 to accommodate the protrusion 14. In this embodiment, the protrusion 14 is designed to be circular. The depth and width of the groove 15 match the protrusion 14, ensuring a tight fit between the protrusion 14 and the groove 15. Furthermore, a sealing ring 16 is provided inside the groove 15. The sealing ring 16 is made of silicone material, has good elasticity, and provides a reliable seal when the upper shell 1 and lower shell 2 are closed, preventing external impurities and liquids from entering the alarm housing and damaging the internal equipment.

[0050] The implementation principle of the laser methane alarm for underground valve wells according to this application embodiment is as follows: When the laser methane alarm malfunctions, maintenance personnel need to open the well cover and go down into the well to inspect and repair the alarm. When maintenance personnel need to disassemble the alarm housing, they only need to press the pressing rod 1103 and push the sliding sleeve 7 downward, thereby increasing the distance between the sliding sleeve 7 and the receiving plate 9. Under the action of the first hinge rod 1302 and the second hinge rod 1303, the unfolding plate 1301 is driven to retract. After retraction, the unfolding plate 1301 loses its clamping effect on the fixed sleeve 3, thus easily disassembling the alarm housing. After the maintenance work is completed, when it is necessary to install the alarm housing, the pressing rod 1103 is pressed inward and the sliding sleeve 7 is pushed downward, thereby decreasing the distance between the sliding sleeve 7 and the receiving plate 9. Under the action of the first hinge rod 1302 and the second hinge rod 1303, the unfolding plate 1301 is driven to expand. After expansion, the unfolding plate 1301 can clamp against the fixed sleeve 3, thus allowing the alarm housing to be installed.

[0051] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A laser methane alarm for underground valve wells, characterized in that: The device includes an upper shell (1) and a lower shell (2). Multiple sets of fixing sleeves (3) are fixed to the side wall of the upper shell (1). A receiving sleeve (4) that cooperates with the fixing sleeves (3) is fixed to the side wall of the lower shell (2). Two limiting grooves (5) are symmetrically opened on the fixing sleeves (3). A connecting rod (6) is provided inside the fixing sleeves (3). A sliding sleeve (7) slides on the connecting rod (6). The sliding sleeve (7) is positioned between the fixing sleeves (3) and the connecting rod (6). (6) One end is fixed with a fixing plate (8), and the other end of the connecting rod (6) is fixed with a receiving plate (9). The end of the fixing plate (8) away from the connecting rod (6) is fixed on the upper shell (1). The sliding sleeve (7) is provided with a pressing mechanism (10) that works with the limiting groove (5) and restricts the sliding sleeve (7) from sliding on the fixing sleeve (3). The sliding sleeve (7) and the receiving plate (9) are provided with an unfolding mechanism (12) for restricting the upper shell (1) and the lower shell (2) from separating.

2. The underground valve well laser methane alarm according to claim 1, characterized in that: The pressing mechanism (10) includes two sets of pressing structures (11), which are symmetrically arranged on the sliding sleeve (7). Each pressing structure (11) includes a receiving groove (1101) opened on the sliding sleeve (7), a pressing rod (1103) sliding in the receiving groove (1101), and a spring (1102) arranged in the receiving groove (1101) to reset the pressing rod (1103). The end of the pressing rod (1103) away from the spring (1102) is rounded.

3. The underground valve well laser methane alarm according to claim 1, characterized in that: The unfolding mechanism (12) includes multiple sets of unfolding components (13), which are evenly spaced between the sliding sleeve (7) and the receiving plate (9). Each unfolding component (13) includes an unfolding plate (1301) disposed below the sliding sleeve (7), a first hinge rod (1302) fixed on the sliding sleeve (7), and a second hinge rod (1303) fixed on the receiving plate (9). One end of the first hinge rod (1302) is fixed on the sliding sleeve (7), and the other end of the first hinge rod (1302) is fixed on the unfolding plate (1301). One end of the second hinge rod (1303) is fixed on the receiving plate (9), and the other end of the second hinge rod (1303) is fixed on the unfolding plate (1301). The inner wall of the receiving sleeve (4) is provided with a receiving cavity (17) for restricting the vertical displacement of the unfolded plate (1301) after unfolding.

4. The underground valve well laser methane alarm according to claim 1, characterized in that: The upper shell (1) has a protrusion (14) fixed on the side facing the lower shell (2), and the lower shell (2) has a groove (15) for accommodating the protrusion (14) on the side facing the upper shell (1).

5. The underground valve well laser methane alarm according to claim 4, characterized in that: A sealing ring (16) is provided inside the groove (15).

6. The underground valve well laser methane alarm according to claim 1, characterized in that: Multiple heat dissipation strips (18) are fixed on the side of the upper shell (1) away from the lower shell (2), and the multiple heat dissipation strips (18) are used to increase the heat dissipation area of ​​the upper shell (1).

7. The underground valve well laser methane alarm according to claim 1, characterized in that: The side wall of the fixed sleeve (3) has two pressing grooves (19), which are arranged symmetrically.

8. The underground valve well laser methane alarm according to claim 1, characterized in that: The fixing plate (8) is rounded on the side away from the upper shell (1).

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