A self-closing valve concealed box

Abstract

This utility model belongs to the technical field of gas pipeline connectors, and relates to a self-closing valve concealed box. This utility model includes a concealed box body, which has a space for installing a self-closing valve. The concealed box body has detachable pipeline protective components at both ends. The concealed box body has a self-closing valve fixing panel, and the self-closing valve fixing panel has an embedded valve body control handle fixing structure. The concealed box body and the self-closing valve fixing panel in this utility model are made of 304 stainless steel. 304 stainless steel has extremely strong corrosion resistance and wear resistance, effectively resisting the erosion of the high humidity and high oil pollution environment of the kitchen, avoiding the problem of easy aging and cracking of traditional plastic concealed boxes, and improving service life. Furthermore, through the sealing element in the embedded valve body control handle fixing structure, and the snap-fit ​​cooperation between the self-closing valve fixing panel and the concealed box body, a double sealing system is formed, effectively preventing gas leakage.

Description

Technical Field

[0001] This utility model belongs to the technical field of gas pipeline connectors and relates to a self-closing valve buried box. Background Technology

[0002] In modern home kitchen renovations, the installation of gas systems must meet both safety regulations and aesthetic requirements. Currently, kitchen gas pipes and valves are typically installed exposed, which presents several problems: Firstly, exposed pipes and valves are easily contaminated with grease produced during cooking, making cleaning difficult and causing long-term grease buildup to corrode the pipe and valve surfaces, shortening their lifespan; secondly, exposed valves lack effective protection and are easily damaged or leaked due to collisions or misoperation, posing serious safety hazards. To address the aforementioned issues, some gas valve concealed boxes have appeared on the market. However, existing concealed boxes mostly use a plastic split structure, which has significant drawbacks: First, plastic has poor corrosion resistance and is prone to aging and cracking in the high humidity and oily environment of a kitchen. After 1-2 years of use, its sealing performance will decline, failing to guarantee long-term gas safety. Second, the sealing design of the joints in the plastic split structure is insufficient, allowing gas to leak from gaps. Furthermore, installation requires multiple screws, making the process cumbersome and demanding a high level of skill from installers. Third, existing concealed boxes lack a dedicated fixing structure for the self-closing valve control handle, leaving it exposed and vulnerable to impact damage or accidental activation that could alter the valve's open / closed state, further increasing safety risks. In summary, existing kitchen gas pipeline and valve installation methods and concealed box products cannot simultaneously meet the requirements of safety, aesthetics, durability, and convenient installation. A new type of self-closing valve concealed box is urgently needed to solve these technical pain points.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses a concealed valve box for a gas self-closing valve [Application No.: 202421205696.7], which includes a valve box body. A first universal pipe connector is fixedly installed on the front of the valve box body. The surface of the first universal pipe connector is provided with an external threaded hole, and a limiting threaded ring is threadedly connected to the surface of the external threaded hole. However, this solution still has drawbacks such as poor corrosion resistance and sealing performance, as well as troublesome installation. Summary of the Invention

[0004] The purpose of this utility model is to address the above-mentioned problems by providing a self-closing valve concealed box.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A self-closing valve concealed box includes a concealed box body with a space for installing the self-closing valve inside. The concealed box body has detachable pipe protection components at both ends. The concealed box body has a self-closing valve fixing panel with an embedded valve body control handle fixing structure. The bottom of the self-closing valve fixing panel has a snap-fit ​​structure that engages with the inner wall of the concealed box body. The concealed box body and the self-closing valve fixing panel are made of stainless steel.

[0007] In the aforementioned self-closing valve concealed box, the embedded valve body control handle fixing structure includes an embedded card plate disposed on the self-closing valve fixing panel, the embedded card plate being provided with a sealing element and a rotatable valve body control handle.

[0008] In the aforementioned self-closing valve concealed box, the self-closing valve fixing panel is provided with a through hole and a control handle hole. The through hole is positioned opposite to the sealing element, and the valve body control handle passes through the control handle hole.

[0009] In the aforementioned self-closing valve embedded box, the top of the self-closing valve fixing panel has an upward-facing recessed groove, and the embedded card is embedded in the recessed groove. The main body of the embedded box and the self-closing valve fixing panel are made of 304 stainless steel, and the embedded card is made of elastic plastic material.

[0010] In the aforementioned self-closing valve concealed box, the bottom of the valve body control handle is provided with a valve body straight alignment groove with an opening facing the self-closing valve installation space, and the top of the valve body control handle is provided with an annular anti-slip protrusion.

[0011] In the aforementioned self-closing valve embedded box, the sealing element includes a sealing cover disposed on an embedded card plate. The sealing cover is made of rubber material and consists of a buckle body and a puller body. The buckle body is a frustum-shaped body with a diameter that gradually decreases from bottom to top, and the puller body is a frustum-shaped body with a diameter that gradually increases from bottom to top. The height of the buckle body is less than the height of the puller body.

[0012] In the aforementioned self-closing valve concealed box, the detachable pipe protection component includes protective liner tubes disposed at the front and rear ends of the concealed box body, a slide rail is provided at the tail end of the protective liner tube, an alignment groove is provided in the slide rail, and alignment strips that slide in cooperation with the alignment groove are provided at the front and rear ends of the concealed box body.

[0013] In the aforementioned concealed box for a self-closing valve, the concealed buckle structure includes an elastic buckle disposed at the bottom of the self-closing valve fixing panel, a trapezoidal contact block is provided on the bottom outer side of the elastic buckle, and several parallel friction strips are provided on the outer side of the trapezoidal contact block.

[0014] In the aforementioned self-closing valve concealed box, a reinforcing frame is provided between the inner side of the elastic buckle and the self-closing valve fixing panel.

[0015] In the aforementioned self-closing valve concealed box, the bottom of the concealed box body is provided with several screw holes that communicate with the self-closing valve installation space.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. The concealed box body and the self-closing valve fixing panel in this utility model are made of 304 stainless steel. 304 stainless steel has extremely strong corrosion resistance and wear resistance, which can effectively resist the erosion of the high humidity and high oil pollution environment in the kitchen, avoid the problem of easy aging and cracking of traditional plastic concealed boxes, and improve service life.

[0018] 2. This utility model forms a double sealing system by using the sealing element in the embedded valve body control handle fixing structure and the snap-fit ​​cooperation between the self-closing valve fixing panel and the main body of the buried box, which effectively prevents gas leakage.

[0019] 3. The detachable pipe protection component in this utility model can be quickly assembled and disassembled with the main body of the buried box through the sliding cooperation of the slide rail and the alignment groove. It is suitable for pipe installation errors of ±5mm and the installation efficiency is 40% higher than that of the traditional fixed protective sleeve. The self-closing valve fixing panel is snapped to the main body of the buried box through the concealed buckle structure. It can be installed and disassembled without tools. A single person can complete the whole installation within 10 minutes. During the later maintenance, damaged parts can be replaced separately without disassembling the whole box, reducing maintenance costs by 50%.

[0020] 4. The embedded valve body control handle fixing structure in this utility model can effectively fix and protect the valve body control handle, preventing damage or alteration of the control handle due to collision or accidental contact; the annular anti-slip protrusion at the top of the valve body control handle and the straight alignment groove at the bottom not only facilitate operation but also ensure precise docking between the control handle and the self-closing valve, improving operational reliability; the screw holes at the bottom of the concealed box body can achieve a stable connection with the wall or ground, further ensuring the overall structural stability.

[0021] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 This is a partial structural schematic diagram of the present invention.

[0024] Figure 3 This is a structural diagram of the self-closing valve fixing panel.

[0025] Figure 4This is a structural diagram of the sealing element.

[0026] Figure 5 This is a structural diagram of the self-closing valve fixing panel from another direction.

[0027] In the diagram: 1. Concealed box body; 2. Self-closing valve installation space; 3. Removable pipe protection component; 4. Self-closing valve fixing panel; 5. Embedded valve body control handle fixing structure; 6. Concealed buckle structure; 7. Embedded card plate; 8. Sealing component; 9. Valve body control handle; 10. Through hole; 11. Control handle hole; 12. Embedded groove; 13. Valve body straight alignment groove; 14. Annular anti-slip protrusion; 15. Cover; 16. Buckle body; 17. Pull-out body; 18. Protective liner; 19. Slide rail; 20. Alignment slide groove; 21. Alignment strip; 22. Elastic buckle; 23. Trapezoidal contact block; 24. Friction strip; 25. Reinforcing frame; 26. Screw hole position. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] like Figure 1-5 As shown, a self-closing valve concealed box includes a concealed box body 1, a self-closing valve installation space 2 inside the concealed box body 1, detachable pipe protection components 3 at both ends of the concealed box body 1, a self-closing valve fixing panel 4 on the concealed box body 1, an embedded valve body control handle fixing structure 5 on the self-closing valve fixing panel 4, and a snap-fit ​​structure 6 at the bottom of the self-closing valve fixing panel 4 that engages with the inner wall of the concealed box body 1. The concealed box body 1 and the self-closing valve fixing panel 4 are made of stainless steel, or the self-closing valve fixing panel 4 can be made of transparent glass.

[0030] In this embodiment, the self-closing valve fixing panel 4 is engaged with the inner wall of the buried box body 1 via the bottom snap-fit ​​structure 6. During installation, the elastic buckle 22 of the snap-fit ​​structure 6 deforms under the pressure of the inner wall of the buried box body 1. When the buckle reaches the preset slot position on the inner wall of the buried box body 1, the elastic buckle 22 resets, achieving a stable connection between the self-closing valve fixing panel 4 and the buried box body 1. The detachable pipe protection component 3 is slidably engaged with the alignment strips 21 at both ends of the buried box body 1 via the slide rail 19. The alignment groove 20 within the slide rail 19 perfectly matches the shape and size of the alignment strip 21. During installation, the alignment groove 20 of the detachable pipe protection component 3 is aligned with the alignment strip 21 of the buried box body 1, and pushed in along the length of the alignment strip 21 to complete assembly. Disassembly is performed in the reverse direction. It can be removed by pulling; the self-closing valve installation space 2 of the concealed box body 1 provides an independent installation environment for the self-closing valve, avoiding direct contact between the self-closing valve and the wall or the external environment, reducing oil stains and corrosion; the detachable pipe protection component 3 can protect the gas pipe entering and exiting the concealed box body 1, preventing the pipe from being damaged by collision or friction, and can also adjust the installation position according to the pipe installation position and angle to adapt to different installation scenarios; the self-closing valve fixing panel 4 can not only fix the self-closing valve, but also cover the opening of the concealed box body 1, improving the aesthetics of the kitchen. The use of 304 stainless steel material ensures that the concealed box body 1 and the self-closing valve fixing panel 4 have excellent corrosion resistance and wear resistance, extending the product service life. Among them, the self-closing valve fixing panel 4, made of transparent glass material, can be easily observed.

[0031] Combination Figure 1-5 As shown, the embedded valve body control handle fixing structure 5 includes an embedded card plate 7 disposed on the self-closing valve fixing panel 4, and the embedded card plate 7 is provided with a sealing element 8 and a rotatable valve body control handle 9.

[0032] Specifically, the embedded plate 7 is embedded in the embedded groove 12 at the top of the self-closing valve fixing panel 4. The size of the embedded groove 12 matches the embedded plate 7, and the embedded plate 7 and the embedded groove 12 adopt an interference fit to ensure that the embedded plate 7 will not loosen during use. The sealing element 8 is fixed in the preset hole of the embedded plate 7 by adhesive bonding, and the axis of the sealing element 8 coincides with the axis of the embedded plate 7. The valve body control handle 9 passes through the preset shaft hole of the embedded plate 7, and the valve body control handle 9 and the shaft hole adopt a clearance fit with a clearance size of 0.1-0.2mm to ensure that the valve body control handle 9 can rotate flexibly while preventing gas leakage. The ABS elastic plastic material of the embedded plate 7 has a certain deformation capacity and can adapt to valve body control handles 9 of different sizes, improving the compatibility of the structure. The sealing element 8 can effectively seal the gap between the embedded plate 7 and the valve body control handle 9 to prevent gas leakage from the gap and ensure safe use. The rotatable design of the valve body control handle 9 makes it convenient for users to operate the self-closing valve and realize the on / off control of gas.

[0033] The self-closing valve fixing panel 4 has a through hole 10 and a control handle hole 11. The through hole 10 is directly opposite to the sealing element 8, and the valve body control handle 9 passes through the control handle hole 11.

[0034] In this embodiment, the through hole 10 is located at the center of the self-closing valve fixing panel 4, directly opposite the seal 8 on the embedded card plate 7. The axis of the through hole 10 coincides with the axis of the seal 8, facilitating user operation of the seal 8 through the through hole 10. The control handle hole 11 is located on one side of the through hole 10, corresponding to the position of the valve body control handle 9 on the embedded card plate 7. The valve body control handle 9 passes through the control handle hole 11, with the top of the valve body control handle 9 extending 115-8mm beyond the control handle hole 11, facilitating user rotation of the control handle. The through hole 10 facilitates user installation, disassembly, and maintenance of the seal 8 without affecting its sealing performance. The control handle hole 11 provides a reasonable installation channel for the valve body control handle 9, ensuring normal rotation of the valve body control handle 9 and providing a certain limiting effect to prevent the control handle from shifting during rotation.

[0035] Combination Figure 3 , Figure 5 As shown, the top of the self-closing valve fixing panel 4 has an upward-facing recessed groove 12, and the recessed card plate 7 is embedded in the recessed groove 12. The main body 1 of the concealed box is made of 304 stainless steel. The self-closing valve fixing panel 4 can be made of 304 stainless steel or transparent glass. The recessed card plate 7 is made of ABS elastic plastic.

[0036] In this embodiment, the embedded card plate 7 is embedded in the embedded groove 12. Since the embedded card plate 7 is made of elastic plastic material, it has a certain elastic deformation capability. During installation, the embedded card plate 7 can be inserted into the embedded groove 12 by slight compression. The interference fit between the embedded card plate 7 and the embedded groove 12 ensures that the connection between the two is stable. At the same time, the deformation of the elastic plastic can compensate for installation errors and avoid loosening due to dimensional deviations. The 304 stainless steel concealed box body 1 and the self-closing valve fixing panel 4 are connected to each side of the concealed box body 1 by welding to ensure the stability of the main structure. The 304 stainless steel material has excellent corrosion resistance, wear resistance and high temperature resistance, and can adapt to the high humidity, high oil stains and large temperature fluctuations of the kitchen environment, extending the service life of the concealed box. The embedded card plate 7 made of elastic plastic has good elasticity and toughness, which can effectively buffer the impact force when the valve body control handle 9 is operated, protect the control handle and the self-closing valve, and at the same time, the elastic deformation capability can adapt to thermal expansion and contraction at different temperatures, avoid gaps in the structure due to temperature changes, and improve sealing performance.

[0037] The bottom of the valve body control handle 9 is provided with a valve body straight alignment groove 13 with an opening facing the self-closing valve installation space 2, and the top of the valve body control handle 9 is provided with an annular anti-slip protrusion 14.

[0038] In this embodiment, the straight groove 13 at the bottom of the valve body control handle 9 engages with the straight protrusion of the self-closing valve core. During installation, align the straight groove 13 with the valve core protrusion, press down and rotate the control handle 9 to achieve precise docking between the control handle and the valve core, ensuring that the rotation of the control handle can synchronously drive the valve core to rotate, thereby turning the gas on and off. The annular anti-slip protrusion 14 on the top increases the friction between the control handle and the hand, especially when the hand is wet or oily, effectively preventing slippage and ensuring reliable operation.

[0039] Combination Figure 2-5 As shown, the sealing element 8 includes a sealing cover 15 disposed on the embedded card plate 7. The sealing cover 15 is made of rubber material and consists of a buckle body 16 and a pull body 17. The buckle body 16 is a frustum-shaped body with a diameter that gradually decreases from bottom to top, and the pull body 17 is a frustum-shaped body with a diameter that gradually increases from bottom to top. The height of the buckle body 16 is less than the height of the pull body 17.

[0040] In this embodiment, the buckle 16 of the sealing cap 15 is embedded in the preset hole of the embedded card plate 7. The frustum-shaped structure of the buckle 16 allows it to fit tightly with the hole. The more pressure is applied, the tighter the fit between the buckle 16 and the hole, resulting in a better sealing effect. The pull-out body 17 is located on the outside of the embedded card plate 7, allowing users to easily remove the sealing cap 15 for maintenance or replacement. Since the height of the buckle 16 is less than the height of the pull-out body 17, the sealing effect is ensured while avoiding the pull-out body 17 being too high and affecting the aesthetics of the kitchen. The sealing cap 15, made of nitrile rubber, has excellent elasticity and oil resistance, effectively adapting to the oily environment of the kitchen and is not prone to aging with long-term use. The frustum-shaped structure of the buckle 16 achieves a tight seal with the hole of the embedded card plate 7, while the inverted frustum-shaped structure of the pull-out body 17 facilitates disassembly. The combination of the two ensures both sealing performance and ease of maintenance. The height design of the buckle and pull-out body is reasonable, balancing sealing effect and aesthetics.

[0041] The detachable pipe protection component 3 includes protective liner tubes 18 disposed at the front and rear ends of the buried box body 1. The tail of the protective liner tube 18 is provided with a slide rail 19. The slide rail 19 is provided with an alignment groove 20. The front and rear ends of the buried box body 1 are provided with alignment strips 21 that slide in cooperation with the alignment groove 20.

[0042] In this embodiment, during installation, a protective liner 18 with a corresponding inner diameter is selected according to the specifications of the gas pipeline. The alignment groove 20 of the slide rail 19 at the tail of the protective liner 18 is aligned with the alignment strips 21 at both ends of the buried box body 1. The liner 18 is pushed in along the length of the alignment strips 21 until the tail of the protective liner 18 is in contact with the end face of the buried box body 1, thus completing the installation. During disassembly, the protective liner 18 is pulled in the opposite direction along the length of the alignment strips 21 to remove it from the buried box body 1. The inner diameter of the protective liner 18 matches the outer diameter of the gas pipeline. The gas pipeline passes through the protective liner 18, and the protective liner 18 protects the pipeline. Protective liner 18 with different inner diameters can be adapted to various specifications of gas pipelines, improving product compatibility. The sliding cooperation between the slide rail 19 and the alignment strips 21 enables quick disassembly and assembly of the detachable pipeline protection component 3, resulting in high installation efficiency and adaptability to ±5mm. The pipeline installation error is reduced, lowering the requirements for installation accuracy; the protective liner 18 can effectively protect the gas pipeline, preventing damage from collision, friction or oil corrosion, and extending the service life of the pipeline.

[0043] Combination Figure 1-3 As shown, the concealed buckle structure 6 includes an elastic buckle 22 disposed at the bottom of the self-closing valve fixing panel 4. The outer bottom of the elastic buckle 22 is provided with a trapezoidal contact block 23, and the outer side of the trapezoidal contact block 23 is provided with a plurality of parallel friction strips 24.

[0044] In this embodiment, when installing the self-closing valve fixing panel 4, the elastic buckle 22 at the bottom of the panel is aligned with the opening of the concealed box body 1 and pressed into the concealed box body 1. The elastic buckle 22 deforms under the pressure of the inner wall of the concealed box body 1. When the trapezoidal contact block 23 reaches the preset slot position on the inner wall of the concealed box body 1, the elastic buckle 22 resets, and the trapezoidal contact block 23 is inserted into the slot, thus fixing the panel to the body. The friction strip 24 on the outside of the trapezoidal contact block 23 is in close contact with the slot on the inner wall of the concealed box body 1, increasing the friction between the two and preventing the panel from loosening during use. When disassembling, the elastic buckle 22 is gently pried with a tool to deform and disengage from the slot, and the panel can be removed. The L-shaped elastic buckle 22... The snap-fit ​​structure and spring steel material ensure that the snap-fit ​​has good elasticity and strength, can be reused and is not easily damaged; the trapezoidal contact block 23 is designed to make it easy for the snap-fit ​​to snap into the slot, while preventing the panel from accidentally falling off; the friction strip 24 increases the friction between the snap-fit ​​and the slot, further improving the stability of the connection; the entire snap-fit ​​structure can be installed and disassembled without tools, making it convenient to operate and improving the installation efficiency compared to traditional screw connections.

[0045] Combination Figure 1-3 As shown, a reinforcing frame 25 is provided between the inner side of the elastic buckle 22 and the self-closing valve fixing panel 4.

[0046] In this embodiment, one side of the reinforcing frame 25 is welded and fixed to the inner side of the elastic buckle 22, and the other side is welded and fixed to the bottom of the self-closing valve fixing panel 4, forming a triangular stable structure to enhance the connection strength between the elastic buckle 22 and the panel; the height of the reinforcing frame 25 is matched with the height of the elastic buckle 22 to ensure that the deformation capability of the elastic buckle 22 is not affected.

[0047] Combination Figure 1-2 As shown, the bottom of the buried box body 1 is provided with several screw holes 26 that are connected to the self-closing valve installation space 2.

[0048] In this embodiment, the screw holes 26 at the bottom of the concealed box body 1 are circular holes with an inner diameter of 6mm, and there are four in total. They are respectively set at the four corners of the bottom of the concealed box body 1. The screw holes 26 are connected to the self-closing valve installation space 2. The inner wall of the hole is provided with internal threads to accommodate M6 screws. When installing the concealed box, the concealed box body 1 is placed in the preset installation position, and the M6 ​​screw is inserted through the screw holes 26. The screw is then screwed into the preset screw holes in the wall or ground to fix the concealed box body 1. Since the screw holes 26 are connected to the self-closing valve installation space 2, the self-closing valve can also be fixed by the screw holes 26 when installing the self-closing valve, thereby improving the installation stability of the self-closing valve.

[0049] The working principle of this utility model is as follows:

[0050] First, determine the installation location of the concealed box based on the installation location and specifications of the kitchen gas pipeline. Then, using an M6 screwdriver, install the box through the screw hole 26 at the bottom of the concealed box body 1. Screws are used to fix the main body 1 of the concealed box to a preset position on the wall or ground. Next, a detachable pipe protection component 3 that is compatible with the gas pipeline specifications is selected. The alignment groove 20 at the tail of the protective liner 18 is aligned with the alignment strips 21 at both ends of the concealed box main body 1, and pushed in along the alignment strips 21 to complete the installation of the pipe protection component. Then, the gas self-closing valve is placed in the self-closing valve installation space 2 of the concealed box main body 1, and the position of the self-closing valve is adjusted so that the valve core of the self-closing valve is aligned with the control handle hole 11 on the self-closing valve fixing panel 4. Finally, the concealed buckle structure 6 at the bottom of the self-closing valve fixing panel 4 is aligned with the opening of the concealed box main body 1 and pressed inward so that the trapezoidal contact block 23 of the elastic buckle 22 is engaged in the slot on the inner wall of the concealed box main body 1. At the same time, it is ensured that the straight alignment groove 13 at the bottom of the valve body control handle 9 is engaged with the straight protrusion of the self-closing valve core to complete the installation of the entire concealed box.

[0051] When the user needs to turn on the gas, they rotate the top of the valve body control handle 9. Because the straight groove 13 at the bottom of the valve body control handle 9 engages with the valve core of the self-closing valve, the rotation of the control handle drives the valve core to rotate, thus opening the gas valve. The annular anti-slip protrusion 14 on the top of the valve body control handle 9 can effectively prevent the hand from slipping and ensure reliable operation. The sealing cover 15 of the sealing element 8 fits tightly with the hole of the embedded card plate 7 to prevent gas from leaking from the control handle hole 11 or the through hole 10. The 304 stainless steel material of the buried box body 1 and the self-closing valve fixing panel 4 can effectively resist the corrosion of kitchen oil and humidity and maintain structural stability.

[0052] When maintenance or replacement of the self-closing valve is required, gently pry the elastic buckle 22 at the bottom of the self-closing valve fixing panel 4 with a tool to disengage it from the groove on the inner wall of the buried box body 1 and remove the self-closing valve fixing panel 4; if the detachable pipe protection component 3 needs to be replaced, pull the protective liner 18 in the opposite direction along the alignment strip 21 to remove the old protection component and replace it with the new one; if the sealing component 8 needs to be replaced, pinch the pull body 17 of the sealing cover 15 through the through hole 10 and pull it upward to remove the old sealing cover, insert the buckle 16 of the new sealing cover 15 into the hole of the embedded card plate 7 to complete the replacement; after maintenance, reassemble the buried box according to the steps of the installation stage for normal use.

[0053] When the gas pipeline experiences overflow exceeding 1.8 times the rated value or underpressure less than 0.75 kPa, the automatic shut-off valve will automatically close, cutting off the gas supply. At this time, the user can determine whether the automatic shut-off valve is closed by observing the status of the valve body control handle 9. If it needs to be reopened, the cause of overflow or underpressure must be checked first. After troubleshooting, the valve body control handle 9 can be turned according to the normal opening procedure. The automatic shut-off valve installation space 2 in the concealed box body 1 provides independent protection for the automatic shut-off valve, preventing damage to the automatic shut-off valve due to external collisions and further ensuring the safety of gas use.

[0054] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0055] Although this document frequently uses terms such as 1. concealed box body, 2. self-closing valve installation space, 3. detachable pipe protection component, 4. self-closing valve fixing panel, 5. embedded valve body control handle fixing structure, 6. concealed buckle structure, 7. embedded card plate, 8. sealing component, 9. valve body control handle, 10. through hole, 11. control handle hole, 12. embedded groove, 13. valve body straight alignment groove, 14. annular anti-slip protrusion, 15. cover, 16. buckle body, 17. pull-out body, 18. protective liner, 19. slide rail, 20. alignment groove, 21. alignment strip, 22. elastic buckle, 23. trapezoidal contact block, 24. friction strip, 25. reinforcing frame, 26. screw hole position, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A recessed box for a self-closing valve, comprising a recessed box body (1), characterized in that, The main body (1) of the buried box has a self-closing valve installation space (2). The main body (1) of the buried box has detachable pipe protection components (3) at both ends. The main body (1) of the buried box has a self-closing valve fixing panel (4). The self-closing valve fixing panel (4) has an embedded valve body control handle fixing structure (5). The bottom of the self-closing valve fixing panel (4) has a hidden buckle structure (6) that engages with the inner wall of the main body (1). The main body (1) of the buried box and the self-closing valve fixing panel (4) are made of stainless steel.

2. The self-closing valve recess box according to claim 1, wherein, The embedded valve body control handle fixing structure (5) includes an embedded card plate (7) set on the self-closing valve fixing panel (4), and the embedded card plate (7) is provided with a sealing element (8) and a rotatable valve body control handle (9).

3. A recessed valve box according to claim 2, wherein, The self-closing valve fixing panel (4) has a through hole (10) and a control handle hole (11). The through hole (10) is directly opposite to the sealing element (8), and the valve body control handle (9) passes through the control handle hole (11).

4. The self-closing valve recess box according to claim 3, wherein, The top of the self-closing valve fixing panel (4) has an upward-facing recessed groove (12), and the recessed card plate (7) is embedded in the recessed groove (12). The main body (1) of the buried box and the self-closing valve fixing panel (4) are made of 304 stainless steel, and the recessed card plate (7) is made of elastic plastic material.

5. A recessed valve box according to claim 4, wherein, The bottom of the valve body control handle (9) is provided with a valve body straight-line alignment groove (13) with an opening facing the self-closing valve installation space (2), and the top of the valve body control handle (9) is provided with an annular anti-slip protrusion (14).

6. A recessed valve box according to claim 5, wherein, The sealing element (8) includes a sealing cap (15) disposed on the embedded card plate (7). The sealing cap (15) is made of rubber material and consists of a buckle body (16) and a pull body (17). The buckle body (16) is a frustum with a diameter that gradually decreases from bottom to top, and the pull body (17) is a frustum with a diameter that gradually increases from bottom to top. The height of the buckle body (16) is less than the height of the pull body (17).

7. A recess box for a self-closing valve according to any one of claims 1-6, characterized in that The detachable pipe protection component (3) includes a protective liner (18) set at the front and rear ends of the buried box body (1). The tail of the protective liner (18) is provided with a slide rail (19). The slide rail (19) is provided with an alignment groove (20). The front and rear ends of the buried box body (1) are provided with alignment strips (21) that slide in cooperation with the alignment groove (20).

8. A recess box for a self-closing valve according to any one of claims 1-6, characterized in that The concealed buckle structure (6) includes an elastic buckle (22) located at the bottom of the self-closing valve fixing panel (4). The bottom of the outer side of the elastic buckle (22) is provided with a trapezoidal contact block (23), and the outer side of the trapezoidal contact block (23) is provided with several parallel friction strips (24).

9. A recessed valve box according to claim 8, wherein, A reinforcing frame (25) is provided between the inner side of the elastic buckle (22) and the self-closing valve fixing panel (4).

10. The self-closing valve recess box according to claim 1, wherein, The bottom of the buried box body (1) is provided with several screw holes (26) that are connected to the self-closing valve installation space (2).

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