A burst valve device unaffected by temperature and space

Abstract

This utility model relates to the field of coal mine production technology, specifically to a rupture valve device unaffected by temperature and space. It includes a rupture valve fitted onto a grouting pipe, the rupture valve being made of a temperature-insensitive metal with a low expansion rate. A protective sleeve with clearance holes is fitted around the outside of the rupture valve, the clearance holes corresponding to the pressure relief holes of the grouting pipe, thus creating a reserved expansion gap between the rupture valve and the borehole wall. By using a temperature-insensitive metal with a low expansion rate to manufacture the rupture valve, the interference of temperature changes on the rupture valve's performance is fundamentally reduced, ensuring the stability of the rupture valve's operation under different temperature environments. Furthermore, by providing a protective sleeve with clearance holes on the outside of the rupture valve, a reserved expansion gap is created between the rupture valve and the borehole wall, avoiding obstruction of the rupture valve's rupture and pressure relief action by small-diameter holes, thus improving the adaptability and reliability of the rupture valve device under complex working conditions.

Description

Technical Field

[0001] This utility model relates to the field of coal mine production technology, specifically to a rupture valve device that is unaffected by temperature and space. Background Technology

[0002] In coal mining, grouting, pressure sealing, and anchor cable grouting of underground drainage boreholes are crucial processes for ensuring safe production. Currently, pneumatic grouting pumps are widely used in the industry for grouting operations. The blasting valve, as a key component in this process, directly affects the sealing effect due to its operational stability. In existing technology, the blasting valve device on the sealing device for underground drainage boreholes in coal mines mainly consists of a grouting pipe and a blasting valve, with the blasting valve directly installed at the borehole location of the grouting pipe.

[0003] For example, Chinese patent document CN203430472U discloses a sealing device for rapid sealing of drilled holes. The device includes a drain pipe, a connecting plate, and a grouting pipe connected to the drain pipe via the connecting plate. The connecting plate divides the drain pipe into a first capsule area, an intermediate area, and a second capsule area. The grouting pipe is equipped with a ball valve, a check valve, and a burst valve. Check valves are installed on the grouting pipes of the first and second capsule areas, and the burst valve is installed on the grouting pipe of the intermediate area.

[0004] However, the ordinary burst valves used in the aforementioned sealing devices have the following defects: 1. Poor temperature adaptability: The burst pressure of the burst valve is greatly affected by the downhole ambient temperature. When temperature changes cause the rated pressure of the burst valve to be too low, the burst valve will burst prematurely, resulting in the bladder not being filled with grout, ultimately leading to sealing failure. When temperature changes cause the rated pressure of the burst valve to be too high, the burst valve bursts with a delay, and the bladder and sealing tube will be subjected to pressure exceeding their bearing capacity, leading to bladder rupture and damage to the extraction tube, also resulting in sealing failure. 2. Insufficient applicability: When the diameter of the downhole borehole is small, the burst valve will directly adhere to the borehole wall during grouting, thus lacking the necessary expansion space for the burst valve, causing it to fail to burst normally, ultimately leading to sealing failure.

[0005] Failed sealing requires re-drilling and resealing, which not only wastes significant manpower and material resources and increases operating costs, but also severely impacts extraction efficiency and hinders the production progress of coal mines. Therefore, developing a blasting valve device that is unaffected by temperature and space and provides stable blasting pressure has become an urgent technical problem to be solved in underground coal mine operations. Utility Model Content

[0006] This invention provides a burst valve device that is unaffected by temperature and space, thereby solving the technical problem that existing burst valves are susceptible to temperature and space influences, leading to their inability to burst normally.

[0007] To solve the above problems, the present invention provides a rupture valve device that is unaffected by temperature and space, employing the following technical solution: A burst valve device unaffected by temperature and space includes a burst valve for being sleeved on a grouting pipe. The burst valve is made of a metal material that is not sensitive to temperature and has a low expansion rate. A protective sleeve with a clearance hole is sleeved on the outside of the burst valve. The position of the clearance hole corresponds to the pressure relief hole of the grouting pipe so that a reserved expansion gap is formed between the burst valve and the borehole wall.

[0008] This utility model provides a burst valve device unaffected by temperature and space. By using a temperature-insensitive metal material with a low expansion rate to manufacture the burst valve, the interference of temperature changes on the burst valve's performance is reduced at the source, ensuring the stability of the burst valve's operation under different temperature environments. In addition, by setting a protective sleeve with clearance holes on the outside of the burst valve, a reserved expansion gap can be formed between the burst valve and the borehole wall, avoiding the obstruction of the burst valve's bursting and pressure relief action by the small orifice diameter, thus improving the adaptability and reliability of the burst valve device under complex working conditions.

[0009] Furthermore, the rate of change of burst pressure of the metal material is less than 5% in the temperature range of -10℃ to 50℃, and the radial expansion rate of the metal material is less than 5% in the rated burst pressure range of 0.6-2MPa and the temperature range of -10℃ to 50℃.

[0010] Furthermore, the diameter of the clearance hole is not less than the diameter of the pressure relief hole of the grouting pipe, and the wall of the clearance hole is rounded.

[0011] Furthermore, the inner side of the protective sleeve has multiple circumferentially extending anti-slip ridges, each of which is evenly arranged along the axial direction of the protective sleeve to increase the friction between the protective sleeve and the rupture valve, so as to prevent the protective sleeve from axially displacing relative to the rupture valve.

[0012] Furthermore, the adhesive backing of the rupture valve is a high-temperature resistant cross-linked pressure-sensitive adhesive, and its peel strength is ≥1.8 MPa in an environment below 60 degrees Celsius.

[0013] Furthermore, a pipe clamp is fitted on the outer side of the protective sleeve, and the inner wall of the pipe clamp has an elastic buffer layer, which is used to prevent the protective sleeve from being damaged due to excessive clamping stress while achieving fixed locking.

[0014] Furthermore, the protective sleeve has tapered guide portions at both ends, with a tapered angle of 30°-45°, and the outer wall of the tapered guide portion is polished to reduce the movement resistance of the device in the borehole.

[0015] The beneficial effects of the explosion valve device provided by this utility model, which is unaffected by temperature and space, are as follows: 1. The explosion valve device provided by this utility model, which is unaffected by temperature and space, uses a metal material that is not sensitive to temperature and has a low expansion rate to make the explosion valve, thereby fundamentally reducing the interference of temperature changes on the performance of the explosion valve and ensuring the stability of the explosion valve in different temperature environments. In addition, by setting a protective sleeve with a clearance hole on the outside of the explosion valve, a reserved expansion gap can be formed between the explosion valve and the borehole wall, avoiding the obstruction of the explosion valve's explosion and pressure relief action by the small orifice, and improving the adaptability and reliability of the explosion valve device under complex working conditions.

[0016] 2. By limiting the diameter of the clearance hole to be no less than the diameter of the pressure relief hole of the grouting pipe, it is ensured that the grout pressure in the grouting pipe can act on the surface of the rupture valve without loss, avoiding pressure transmission obstruction due to the limited hole diameter; in addition, the rounded design of the clearance hole wall can prevent the rupture delay or premature rupture caused by local stress concentration, thus improving the accuracy of the rupture timing.

[0017] 3. By setting evenly distributed anti-slip ridges on the inside of the protective sleeve, the contact friction between the protective sleeve and the rupture valve can be increased, avoiding positional displacement caused by the impact of slurry flow or slight disturbances during installation. This prevents the expansion space of the rupture valve from being squeezed or the pressure transmission channel from being blocked, reducing the risk of sealing failure caused by structural displacement and improving the stability of the rupture valve device.

[0018] 4. By selecting high-temperature cross-linking pressure-sensitive adhesive as the backing, and maintaining a peel strength of ≥1.8 MPa in an environment below 60 degrees Celsius, the adhesive can be prevented from falling off under the influence of rising downhole temperature or pressure impact. This can prevent gaps from appearing on the bonding surface between the rupture valve and the grouting pipe, which could lead to grout leakage, or rupture valve failure due to adhesive detachment. This ensures the sealing and bonding of the rupture valve and the grouting pipe, as well as the overall structural integrity, further improving the reliability of the rupture valve device.

[0019] 5. By setting tapered guides at both ends of the protective sleeve and polishing them, the rupture valve device can be guided smoothly into the borehole, reducing the guiding resistance during installation, avoiding jamming caused by irregular inner walls of the borehole, and helping to improve work efficiency. Attached Figure Description

[0020] Figure 1 This utility model provides a burst valve device that is unaffected by temperature and space. Figure 2 A cross-sectional view of a burst valve device that is unaffected by temperature and space, as provided by this utility model.

[0021] Explanation of reference numerals in the attached figures: 1. Grouting pipe; 11. Pressure relief hole; 2. Bursting valve; 3. Protective sleeve; 31. Clearance hole; 32. Conical guide; 4. Pipe clamp. Detailed Implementation

[0022] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0023] Embodiment 1 of the explosion valve device provided by this utility model that is unaffected by temperature and space: like Figure 1 , Figure 2 As shown, a rupture valve device unaffected by temperature and space includes a rupture valve 2, a protective sleeve 3, and pipe clamps 4. The rupture valve 2 is a diaphragm-type rupture valve with a cylindrical sleeve structure, which is sleeved on the grouting pipe 1 and covers the outside of the pressure relief hole 11. The protective sleeve 3 is sleeved on the outside of the rupture valve 2. There are two pipe clamps 4, both sleeved on the outside of the protective sleeve 3 and located on both sides of the pressure relief hole 11, used to fix the protective sleeve 3 to the grouting pipe 1.

[0024] The burst valve 2 is described below. It is made of a temperature-insensitive metal material with a low rate of expansion. This metal material exhibits a burst pressure change rate of less than 5% within a temperature range of -10°C to 50°C, thus mitigating the influence of temperature on the burst pressure of the valve 2 and preventing it from bursting open due to excessive or insufficient pressure. Furthermore, the radial expansion rate of this metal material is less than 5% within the rated burst pressure range of 0.6-2 MPa and the temperature range of -10°C to 50°C. This allows it to accommodate small-diameter boreholes, preventing small-diameter boreholes from hindering the burst pressure relief action of the valve 2. To prevent the rupture valve 2 from detaching, an adhesive backing is applied to the side of the rupture valve 2 that adheres to the grouting pipe 1. The adhesive backing is a high-temperature resistant cross-linked pressure-sensitive adhesive, which has a peel strength ≥1.8 MPa in environments below 60 degrees Celsius. This prevents gaps from appearing on the bonding surface between the rupture valve 2 and the grouting pipe 1, which could lead to grout leakage, or prevents the rupture valve 2 from failing due to adhesive detachment. This ensures the sealing and fit between the rupture valve 2 and the grouting pipe 1, as well as the overall structural integrity, further improving the reliability of the rupture valve device.

[0025] The protective sleeve 3 is described below. It is a PVC sleeve structure with a clearance hole 31 corresponding to the pressure relief hole 11, for the rupture valve 2 to release pressure upon rupture. The diameter of the clearance hole 31 is twice the diameter of the pressure relief hole 11 to ensure that the grout pressure in the grouting pipe 1 can act on the surface of the rupture valve 2 without loss, avoiding pressure transmission obstruction due to limited orifice diameter. Furthermore, the wall of the clearance hole 31 is rounded to prevent delayed or premature rupture caused by localized stress concentration, thus improving the accuracy of the rupture timing.

[0026] In addition, the inner wall of the protective sleeve 3 has multiple circumferentially extending anti-slip ridges, which are evenly distributed along the axial direction of the protective sleeve 3 to increase the friction between the protective sleeve 3 and the rupture valve 2, thereby preventing axial displacement of the protective sleeve 3 relative to the rupture valve 2. Both the left and right ends of the protective sleeve 3 have tapered guide portions 32 with a cone angle of 30 degrees. The outer wall of the tapered guide portion 32 is polished, which guides the rupture valve 2 device smoothly into the borehole, reduces guiding resistance during installation, avoids jamming caused by irregularities in the inner wall of the borehole, and helps improve work efficiency.

[0027] Both of the pipe clamps 4 have an elastic buffer layer on their inner sides. The elastic buffer layer is made of rubber and is used to achieve circumferential locking of the pipe clamp 4 onto the protective sleeve 3 and to prevent the protective sleeve 3 from being damaged due to excessive clamping stress.

[0028] The operating principle of a burst valve device unaffected by temperature and space is summarized as follows: The explosive valve 2 device utilizes a temperature-insensitive and low-expansion-rate metal material to reduce the impact of temperature on the explosive pressure, ensuring a consistently stable explosive pressure. It also boasts high adaptability, accommodating boreholes of various sizes, thus preventing any impact on the accuracy of the explosive timing. Furthermore, by installing a protective sleeve 3 on the outside of the explosive valve 2, a pre-reserved expansion gap is created between the valve 2 and the borehole wall, further preventing the explosive valve 2 from being affected by space constraints, ensuring the reliability and efficiency of the operation.

[0029] Based on the above description in this specification, those skilled in the art will also understand that the following terms used, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0030] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A temperature and space independent burst valve apparatus comprising a burst valve for being sleeved on a grouting pipe, characterized in that, The rupture valve is made of a metal material that is not sensitive to temperature and has a low expansion rate; a protective sleeve with a clearance hole is fitted on the outside of the rupture valve, and the position of the clearance hole corresponds to the pressure relief hole of the grouting pipe, so as to form a reserved expansion gap between the rupture valve and the borehole wall.

2. A temperature and space independent burst valve device according to claim 1, characterized in that The metal material has a burst pressure change rate of less than 5% in the temperature range of -10℃ to 50℃, and the radial expansion rate of the metal material is less than 5% in the rated burst pressure range of 0.6-2MPa and the temperature range of -10℃ to 50℃.

3. A temperature and space independent burst valve device as claimed in claim 1, wherein, The diameter of the clearance hole is not less than the diameter of the pressure relief hole of the grouting pipe, and the hole wall of the clearance hole is rounded.

4. A temperature and space independent burst valve device according to any one of claims 1-3, characterized in that, The inner side of the protective sleeve has multiple circumferentially extending anti-slip ridges, each of which is evenly arranged along the axial direction of the protective sleeve to increase the friction between the protective sleeve and the rupture valve, so as to prevent the protective sleeve from axially displacing relative to the rupture valve.

5. A temperature and space independent burst valve apparatus as defined in claim 4, wherein, The backing adhesive of the rupture valve is a high-temperature resistant cross-linked pressure-sensitive adhesive, and its peel strength is ≥1.8 MPa in an environment below 60 degrees Celsius.

6. A temperature and space independent burst valve device as defined in claim 1, wherein, The protective sleeve is fitted with a pipe clamp on the outside, and the inner wall of the pipe clamp has an elastic buffer layer, which is used to prevent the protective sleeve from being damaged due to excessive clamping stress while achieving a fixed lock.

7. A temperature and space independent burst valve apparatus as defined in claim 4, wherein, The protective sleeve has tapered guides at both ends, with a tapered angle of 30°-45°. The outer wall of the tapered guides is polished to reduce the movement resistance of the device in the borehole.

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