Bag type two-blocking and one-injecting positioning and section-fixing hole sealing device

Abstract

The utility model discloses a bag type two-blocking and one-injecting positioning and section hole sealing device, which is used for forming a closed space in front of a sieve hole of an extraction pipe, and comprises a pressure relief pipe, and a grouting pump, a first one-way valve, a lower bag, an explosion valve, a second one-way valve and an upper bag which are connected in sequence, the first one-way valve, the lower bag, the explosion valve, the second one-way valve and the upper bag are all communicated through a grouting pipe, the closed space is formed between the upper bag and the lower bag, and the closed space is communicated with the open space where the sieve holes are located through the pressure relief pipe. The problem that a closed space cannot be filled with grout through existing hole sealing equipment is solved, the tightness of hole sealing of the bag is guaranteed, the mine gas extraction concentration is improved, and normal promotion of mine safety production work is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of underground coal mine construction equipment and relates to a bag-type two-blocking and one-injection positioning and segment sealing device. Background Art

[0002] In some coal mining areas, the geological conditions of coal mines are complex, the original faults and fissures of coal seams are well developed, and the drill holes are interconnected through the fissures, which makes internal leakage prone to occur after pumping. The use of bag two-blocking and one-injection positioning and segment sealing technology is of great significance for improving the gas extraction concentration and ensuring the safety of underground working face production.

[0003] The existing bag-type two-blocking and one-injection positioning and segment sealing equipment mainly includes a grouting pump, a one-way valve, a lower bag, a grouting pipe, a bursting valve, a two-way valve, an upper bag and a return grouting pipe connected in sequence. Driven by the grouting pump, the slurry enters the lower bag, the grouting pipe and the upper bag. Because the slurry has the characteristic of expansion, the upper bag and the lower bag expand rapidly, and the outer diameter of the bag is fastened to the wall of the coal seam hole and sealed. When the pressure reaches a certain value, the bursting valve explodes, and the slurry fills the part between the upper bag and the lower bag, thereby achieving multi-layer sealing, and then the gas can be extracted through the extraction pipe. However, in the existing sealing equipment, when the slurry fills the enclosed space between the upper bag and the lower bag, due to the presence of other substances such as the original air, the slurry in the enclosed space cannot be filled, and the extraction effect is limited. Utility Model Content

[0004] The purpose of the utility model is to provide a bag-type two-blocking and one-injection positioning and segmenting sealing device, which solves the problem that the existing sealing equipment cannot be filled with slurry in a closed space, ensures the tightness of the bag sealing, improves the concentration of mine gas extraction, and is conducive to the normal promotion of mine safety production work.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A bag-type two-blocking and one-injection positioning and segment sealing device is used to form a closed space in front of the sieve hole of a pumping pipe, including a pressure relief pipe, and a grouting pump, a first one-way valve, a lower bag, a bursting valve, a second one-way valve and an upper bag connected in sequence. The first one-way valve, the lower bag, the bursting valve, the second one-way valve and the upper bag are all connected through the grouting pipe, and the closed space is formed between the upper bag and the lower bag. The pressure relief pipe connects the closed space with the open space where the sieve hole is located.

[0007] Furthermore, a joint is installed at one end of the grouting pipe, and the joint is located between the grouting pump and the first one-way valve.

[0008] Furthermore, the connector is a quick connector.

[0009] Furthermore, the inner diameter of the pressure relief pipe is 28±6 mm.

[0010] Furthermore, the inner diameter of the pressure relief pipe is 25 mm or 32 mm.

[0011] Furthermore, the distance between the upper bag and the sieve hole along the length direction of the extraction tube is 1-3m.

[0012] Furthermore, the distance between the upper bag and the sieve hole along the length direction of the extraction tube is 2±0.2 m.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The sealing device of the utility model comprises a pressure relief pipe, a grouting pump, a first non-return valve, a lower bladder bag, a bursting valve, a second non-return valve and an upper bladder bag. The enclosed space is connected with the open space where the sieve holes are located through the pressure relief pipe. When grouting is performed on the enclosed space through the bursting valve, the internal air and some sundries can be discharged through the pressure relief pipe, thereby effectively reducing the pressure of the enclosed space between the upper bladder bag and the lower bladder bag during grouting, solving the problem that the slurry cannot be filled in the enclosed space of the existing sealing equipment, ensuring the tightness of the bag sealing, improving the concentration of mine gas extraction, and being beneficial to the normal promotion of mine safety production work. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present utility model and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work, including:

[0016] Figure 1 It is a schematic structural diagram of a bag-type two-blocking and one-injection positioning and segmenting sealing device according to an embodiment of the utility model.

[0017] Markings in the figure:

[0018] 100- extraction tube; 101- sieve hole;

[0019] 10- Grouting pump;

[0020] 20- first one-way valve;

[0021] 30- inferior capsular bag;

[0022] 40-burst valve;

[0023] 50 - second one-way valve;

[0024] 60-upper capsule;

[0025] 70- grouting pipe; 71- quick connector;

[0026] 80-pressure relief pipe;

[0027] 90-Confined space. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of the utility model.

[0030] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0031] As described in the background technology, the existing bag-type two-blocking and one-injection positioning and segment sealing equipment mainly includes a grouting pump, a one-way valve, a lower bag, a grouting pipe, a bursting valve, a one-way valve, an upper bag and a return grouting pipe connected in sequence. Driven by the grouting pump, the slurry enters the lower bag, the grouting pipe and the upper bag. Because the slurry has the characteristic of expansion, the upper bag and the lower bag expand rapidly, and the outer diameter of the bag is fastened to the wall of the coal seam hole and sealed. When the pressure reaches a certain value, the bursting valve explodes, and the slurry fills the part between the upper bag and the lower bag, thereby achieving multi-layer sealing, and then the gas can be extracted through the extraction pipe. However, in the existing sealing equipment, when the slurry fills the enclosed space between the upper bag and the lower bag, due to the presence of other substances such as the original air, the slurry in the enclosed space cannot be filled, and the extraction effect is limited.

[0032] Based on this, the inventor has created a bag-type two-blocking and one-injection positioning and segmenting sealing device of the present application to solve the above-mentioned technical problems.

[0033] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0034] Example

[0035] See also Figure 1 , a bag-type two-blocking and one-injection fixed-segment sealing device is used to form a closed space 90 in front of the sieve hole 101 of the extraction pipe 100. Here, the extraction pipe 100 is used for gas extraction, and the front of the sieve hole 101 refers to the side of the sieve hole 101 close to the ground. The sealing device includes a pressure relief pipe 80, and a grouting pump 10, a first one-way valve 20, a lower bag 30, a bursting valve 40, a second one-way valve 50 and an upper bag 60 connected in sequence. The first one-way valve 20, the lower bag 30, the bursting valve 40, the second one-way valve 50 and the upper bag 60 are all connected through a grouting pipe 70. The closed space 90 is formed between the upper bag 60 and the lower bag 30. The pressure relief pipe 80 connects the closed space 90 with the open space where the sieve hole 101 is located. Here, the upper bag 60 is located farther from the ground than the lower bag 30. Here, when the pressure in the grouting pipe 70 reaches a preset value, the slurry enters the enclosed space 90 through the bursting valve 40, and the squeezed air can be discharged through the pressure relief pipe 80, so that the slurry can fill the enclosed space 90, and the returned slurry can be discharged through the sieve holes 101 of the extraction pipe 100.

[0036] The sealing device of the utility model comprises a pressure relief pipe 80, a grouting pump 10, a first one-way valve 20, a lower bag 30, a bursting valve 40, a second one-way valve 50 and an upper bag 60. The enclosed space 90 is connected with the open space where the sieve hole 101 is located through the pressure relief pipe 80. When grouting is performed on the enclosed space 90 through the bursting valve 40, the internal air and some debris can be discharged through the pressure relief pipe 80, thereby effectively reducing the pressure of the enclosed space 90 between the upper bag 60 and the lower bag 30 during grouting, solving the problem that the slurry in the enclosed space 90 of the existing sealing equipment cannot be filled, ensuring the tightness of the bag sealing, improving the concentration of mine gas extraction, and facilitating the normal promotion of mine safety production work.

[0037] In another embodiment, a joint is installed at one end of the grouting pipe 70, and the joint is located between the grouting pump 10 and the first one-way valve 20. In this way, after the grouting is completed, the grouting pipe 70 can be recovered by dragging, thereby reducing the construction cost. Preferably, the joint can be a quick joint 71. Preferably, the inner diameter of the pressure relief pipe 80 can be 28±6mm. Preferably, the inner diameter of the pressure relief pipe 80 is 25mm or 32mm.

[0038] In another embodiment, the distance between the upper bladder bag 60 and the sieve hole 101 along the length direction of the extraction pipe 100 is 1-3m. In this way, it is possible to effectively prevent the pressure relief pipe 80 from being blocked during grouting. Preferably, the distance between the upper bladder bag 60 and the sieve hole 101 along the length direction of the extraction pipe 100 is 2±0.2m (i.e. Figure 1 in S).

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made by any technician familiar with the field within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bag-type two-blocking and one-injection positioning and segment sealing device, used to form a closed space in front of the sieve hole of the extraction pipe, characterized in that: It includes a pressure relief pipe, and a grouting pump, a first one-way valve, a lower bag, a bursting valve, a second one-way valve and an upper bag connected in sequence. The first one-way valve, the lower bag, the bursting valve, the second one-way valve and the upper bag are all connected through the grouting pipe. The enclosed space is formed between the upper bag and the lower bag. The pressure relief pipe connects the enclosed space with the open space where the sieve hole is located.

2. The bag-type two-blocking and one-injection positioning and segment sealing device according to claim 1 is characterized in that: A joint is installed at one end of the grouting pipe, and the joint is located between the grouting pump and the first one-way valve.

3. The bag-type two-blocking and one-injection positioning and segment sealing device according to claim 2 is characterized in that: The connector is a quick connector.

4. The bag-type two-blocking and one-injection positioning and segment sealing device according to claim 1 is characterized in that: The inner diameter of the pressure relief pipe is 28±6 mm.

5. The bag-type two-blocking and one-injection positioning and segment sealing device according to claim 1 is characterized in that: The inner diameter of the pressure relief pipe is 25 mm or 32 mm.

6. The bag-type two-blocking and one-injection positioning and segment sealing device according to claim 4 is characterized in that: The distance between the upper bag and the sieve hole along the length direction of the extraction tube is 1-3m.

7. The bag-type two-blocking and one-injection positioning and segment sealing device according to claim 6 is characterized in that: The distance between the upper bag and the sieve hole along the length direction of the extraction tube is 2±0.2m.

Images