Movable sealing device of injection system of in-situ coal gas scientific device

Abstract

The utility model discloses a movable sealing device of an injection system of an in-situ coal gas scientific device, which relates to the technical field of sealing devices and comprises a movable sealing component, a linkage injection pipe fixing component, a double-chamber piston, an injection pipe fixing device, an injection pipe main body and a console, the movable sealing assembly comprises a movable sealing shell of a U-shaped structure and an O-shaped ring, and internal threads are formed in the inner ring face of the end of the movable sealing shell. The linkage injection pipe fixing assembly comprises a fixing device shell and two injection pipe fixing parts which are arranged in the fixing device shell and matched with each other, and the injection pipe fixing parts are of semicircular pipe structures. The movable sealing device of the injection system of the in-situ coal gas scientific device, disclosed by the utility model, is simple in structure, can move and seal the gasifying agent injection pipe, realizes a real in-situ coal gas simulation process, and better serves field production.

Description

TECHNICAL FIELD

[0001] The utility model relates to sealing device technical field especially relates to a kind of mobile sealing device of in-situ coal gasification scientific device injection system. BACKGROUND

[0002] In-situ coal gasification refers to controlled combustion of coal seam underground, and the generated gas containing hydrogen, carbon monoxide, methane and other usable gases is transported to the ground for use.

[0003] During in-situ coal gasification, a dedicated continuous pipe injection equipment is needed, which includes a drum pry for storing the continuous pipe, a power pry for providing power, a control room for controlling the equipment, and an injection pry for moving and sealing the continuous pipe. The multiple prys cooperate with each other to achieve the functions of moving and sealing, moving the continuous pipe injection equipment forward and backward, and achieving controlled combustion of coal seam.

[0004] Therefore, it is necessary to move and seal the continuous pipe. Before industrialized production of in-situ coal gasification, similar experiments need to be conducted in the laboratory. The parameters obtained from the experiments are used to guide the industrialized production. However, the in-situ coal gasification simulation device injection system used in the experiments is exactly the same as the injection pry sealing device used in industrialized production. It not only has a complex structure, but also is expensive. Therefore, the present application proposes a mobile sealing device for in-situ coal gasification scientific device injection system. SUMMARY

[0005] The utility model discloses a kind of mobile sealing device of in-situ coal gasification scientific device injection system, to solve the technical problem of complex structure and expensive proposed in background art.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A kind of mobile sealing device of in-situ coal gasification scientific device injection system, comprising:

[0008] Mobile sealing assembly, linkage injection pipe fixing assembly, double-chamber piston, injection pipe fixing device, injection pipe main body and control console;

[0009] The mobile sealing assembly includes a concave-shaped mobile sealing housing and an O-ring, and the end inner ring surface of the mobile sealing housing is provided with internal threads.

[0010] The linkage injection pipe fixing assembly comprises a fixing device shell and two matched injection pipe fixing members arranged inside the fixing device shell, and the injection pipe fixing members are semicircular pipe structures, the linkage injection pipe fixing assembly further comprises two symmetrical power interfaces arranged on the outer surface of the fixing device shell and a T-shaped metal member slidingly arranged inside the power interfaces, the outer side of the power interface is connected with the pipeline on the control console, and the inner side of the power interface is in T-shaped structure.

[0011] The double-chamber piston comprises a piston shell, a piston sheet and a piston rod, the piston sheet is slidingly connected with the inner wall of the piston shell, the two side surfaces of the piston sheet are fixedly connected with two hollow piston rods, a limiter is arranged on the outer surface of the piston rod, and the injection pipe body is slidingly connected with the inner wall of the piston rod.

[0012] The structure of the injection pipe fixing device is the same as that of the linkage injection pipe fixing assembly, and the end of the injection pipe fixing device is reserved with a channel for the piston rod to slide in and out.

[0013] In a preferred scheme, the inner diameter of one end of the movable sealing shell is greater than the outer diameter of the injection pipe body, and the inner diameter of the other end of the movable sealing shell is equal to the outer diameter of the O-shaped ring, and the inner diameter of the O-shaped ring is equal to the outer diameter of the injection pipe body.

[0014] In a preferred scheme, an external thread ring is welded and fixed at the end of the fixing device shell, and the external thread ring is in threaded connection with the internal thread of the inner ring surface of the end of the movable sealing shell.

[0015] In a preferred scheme, a connecting piece is welded and fixed at the other end of the fixing device shell, and a first screw thread is fixed at the end of the piston rod and is in threaded connection with the connecting piece.

[0016] In a preferred scheme, the piston shell is divided into two chamber shells by the piston sheet, and the two chamber shells are respectively provided with a power interface a and a power interface b.

[0017] In a preferred scheme, a second screw thread is arranged at the end of the piston shell, a third screw thread is fixed at the end of the injection pipe fixing device and is matched with the second screw thread, and the second screw thread is in threaded connection with the third screw thread.

[0018] In a preferred scheme, the injection pipe fixing member is a semicircular pipe structure, the linkage injection pipe fixing assembly further comprises two symmetrical power interfaces arranged on the outer surface of the fixing device shell and a T-shaped metal member slidingly arranged inside the power interfaces, the outer side of the power interface is connected with the pipeline on the control console, and the inner side of the power interface is in T-shaped structure.

[0019] In a preferred scheme, the two side surfaces of the piston sheet are fixedly connected with two hollow piston rods, the outer surface of the piston rod is provided with a position limiter, and the injection pipe is mainly in sliding connection with the inner wall of the piston rod.

[0020] In a preferred scheme, the structure of the injection pipe fixing device is the same as that of the linkage injection pipe fixing assembly, and the end of the injection pipe fixing device is reserved with a channel for the piston rod to slide in and out.

[0021] As can be seen, the mobile sealing device of the injection system of the in-situ coal gasification scientific device has the following technical effects.

[0022] The utility model provides a mobile sealing device of injection system for in-situ coal gasification simulation device, its simple structure can realize the movement and sealing of gasification agent injection pipe, realizes the real in-situ coal gasification simulation process, better service on -the -spot production. ACCURACY OF DRAWINGS

[0023] Figure 1 The utility model provides a mobile sealing device of injection system of in-situ coal gasification scientific device's overall structure schematic diagram.

[0024] Figure 2 The utility model provides a mobile sealing device of injection system of in-situ coal gasification scientific device's assembly structure schematic diagram.

[0025] Figure 3 The utility model provides a mobile sealing device of injection system of in-situ coal gasification scientific device's mobile sealing assembly structure schematic diagram.

[0026] Figure 4 The utility model provides a mobile sealing device of injection system of in-situ coal gasification scientific device's mobile sealing assembly double thread sealing structure schematic diagram.

[0027] Figure 5 The utility model provides a mobile sealing device of injection system of in-situ coal gasification scientific device's linkage injection pipe fixing assembly structure schematic diagram.

[0028] Figure 6 The utility model provides a mobile sealing device of injection system of in-situ coal gasification scientific device's linkage injection pipe fixing assembly side structure schematic diagram.

[0029] Figure 7 The utility model provides a mobile sealing device of injection system of in-situ coal gasification scientific device's double chamber piston structure schematic diagram.

[0030] Figure 8The utility model provides a kind of mobile sealing device's connecting piece structure schematic view of in-situ coal gasification scientific device injection system.

[0031] Figure 9 The utility model provides a kind of mobile sealing device's injection pipe fixed component structure schematic view of in-situ coal gasification scientific device injection system.

[0032] In the drawings:

[0033] 1, mobile sealing assembly;1-1, mobile sealing shell;1-2, O ring;

[0034] 2, linkage injection pipe fixed component;2-1, power interface;2-2, T type metal piece;2-3, fixed device shell;2-4, injection pipe fixing piece;

[0035] 3, double-chamber piston;3-1, piston shell;3-2, piston sheet;3-3, piston rod;3-4, stopper;

[0036] 4, connecting piece;

[0037] 5, injection pipe fixing device;

[0038] 6, injection pipe main body. DETAILED DESCRIPTION

[0039] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0040] In the description of the utility model, it needs to be understood that the orientation or position relationship indicated by terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and is not indicative or suggestive of the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, so it cannot be understood as a limitation on the utility model.

[0041] Referring to Figures 1 to 9 A kind of mobile sealing device of in-situ coal gasification scientific device injection system, comprising:

[0042] Mobile sealing assembly 1, linkage injection pipe fixed component 2, double-chamber piston 3, injection pipe fixing device 5, injection pipe main body 6 and control console;

[0043] Wherein, the injection pipe body 6 is to inject the gasifying agent from its inside to the combustion site of the coal seam, and the accurate injection of the gasifying agent to the reaction zone is realized by moving the injection pipe body 6 forward and backward; the control console is a power system for realizing the movement of the sealing device, and gas or liquid is used as the power source, the sealing device is connected with the sealing device through pipelines, and the movement of the sealing device is realized by controlling the pressure and direction of the gas or liquid. In view of the fact that the hydraulic pressure is easier to control, it is suggested to use the hydraulic pressure as the power.

[0044] The moving sealing assembly 1 comprises a concave-shaped moving sealing shell 1-1 and an O-shaped ring 1-2, and the end inner ring surface of the moving sealing shell 1-1 is provided with internal threads;

[0045] Referring to Figure 1 and Figure 3 In a preferred embodiment, the inner diameter of one end of the moving sealing shell 1-1 is greater than the outer diameter of the injection pipe body 6, and the inner diameter of the other end of the moving sealing shell 1-1 is equal to the outer diameter of the O-shaped ring 1-2, and the inner diameter of the O-shaped ring 1-2 is equal to the outer diameter of the injection pipe body 6.

[0046] The moving sealing device is suitable for a circular pipe with a small deformation amount, and the circular pipe is sealed by extruding the deformable O-shaped ring 1-2. The pressure bearing capacity of the cylinder body of the moving sealing device can be designed according to the actual experimental pressure grade, and the moving sealing grade is generally designed to be 4-10 MPa according to the actual production needs of the in-situ coal gasification.

[0047] Specifically referring to Figure 1 , Figure 5 and Figure 6 The linkage injection pipe fixing assembly 2 comprises a fixing device shell 2-3 and two injection pipe fixing members 2-4 which are adapted to each other and are arranged in the fixing device shell 2-3, and the injection pipe fixing members 2-4 are in a semicircular pipe shape. The linkage injection pipe fixing assembly 2 further comprises two symmetrical power interfaces 2-1 arranged on the outer surface of the fixing device shell 2-3 and a T-shaped metal member 2-2 slidingly arranged in the power interface 2-1. The outer side of the power interface 2-1 is connected with the pipelines on the control console, and the inner part of the power interface 2-1 is in a T-shaped structure. When the T-shaped metal member 2-2 moves to the lower part and contacts the lower part of the power interface 2-1, it can no longer move downward, so as to prevent the injection pipe fixing member 2-4 from being damaged due to the continuous downward movement of the T-shaped metal member 2-2.

[0048] Referring to Figure 1 and Figure 3 In a preferred embodiment, an external thread ring is welded and fixed to the end of the fixing device shell 2-3, and the external thread ring is threadedly connected with the internal threads of the end inner ring surface of the moving sealing shell 1-1.

[0049] Wherein, the mobile sealing principle is that when the fixed device shell 2-3 is screwed with the outer thread of the mobile sealing shell 1-1, the fixed device shell 2-3 extrudes the O-shaped ring 1-2 to make it deform, so that the outer diameter surface of the O-shaped ring 1-2 and the inner diameter surface of the mobile sealing shell 1-1 and the O-shaped ring 1-2 are in contact with the outer interface of the injection pipe body 6 more closely, and sealing is realized. When the force applied on the injection pipe in the axial direction is greater than the friction between the sealing surface and the injection pipe, the mobile sealing is realized. Meanwhile, based on this principle, the mobile sealing shell 1-1 can be provided with a double-sided thread structure to realize double-sided extrusion mobile sealing, as shown in detail in Figure 4

[0050] Wherein, the T-shaped metal piece 2-2 can move up and down inside the power interface 2-1. When moving downward, it extrudes the injection pipe fixing piece 2-4 to make the injection pipe fixing piece 2-4 close together and fix the injection pipe body 6. When the injection pipe fixing piece 2-4 is closed, the injection pipe fixing assembly 2 and the injection pipe body 6 can be regarded as a whole. When the piston sheet 3-2 moves, the injection pipe body 6 and the injection pipe fixing assembly 2 move together with the piston sheet 3-2. When the T-shaped metal piece 2-2 moves upward, the injection pipe fixing piece 2-4 is separated, and the injection pipe body 6 is in a non-fixed state. When the piston sheet 3-2 moves, the injection pipe body 6 does not move together with the piston sheet 3-2.

[0051] Wherein, the injection pipe fixing piece 2-4 is located in the injection pipe fixing assembly 2 and its length is slightly smaller than the length of the cavity, so it will not move inside. Moreover, the injection pipe fixing piece 2-4 is composed of two semicircles, and there are transverse or longitudinal grooves inside the semicircles. When the injection pipe fixing piece 2-4 is closed, the engagement force with the continuous pipe is increased. There is a set of grooves on the outside of the injection pipe fixing piece 2-4, and the lower part of the T-shaped metal piece 2-2 is located in the groove, which can ensure that the injection pipe fixing piece 2-4 does not move inside the injection pipe fixing assembly 2.

[0052] Specifically, after the console pipeline power interface 2-1 is connected, the console applies a force to the T-shaped metal piece 2-2, and the T-shaped metal piece 2-2 moves downward, which promotes the two injection pipe fixing pieces 2-4 to move inward and tightly hold the gasifying agent injection pipe body 6, so that the gasifying agent injection pipe body 6 cannot move forward and backward, thereby making the injection pipe body 6 move with the piston sheet 3-2.

[0053] Referring to Figure 1 , Figure 2 and Figure 7 , the double-chamber piston 3 includes a piston shell 3-1, a piston sheet 3-2, and a piston rod 3-3. The piston sheet 3-2 is in sliding connection with the inner wall of the piston shell 3-1, and the two side surfaces of the piston sheet 3-2 are fixedly connected with the two hollow piston rods 3-3. The outer surface of the piston rod 3-3 is provided with a limiter 3-4, and the injection pipe body 6 is in sliding connection with the inner wall of the piston rod 3-3.

[0054] Referring to​Figure 1 and Figure 8 In a preferred embodiment, the other end of the fixing device housing 2-3 is welded with a connecting piece 4, and the end of the piston rod 3-3 is fixedly provided with a first thread that is screwed with the connecting piece 4.

[0055] Referring to Figure 1 and Figure 7 In a preferred embodiment, the piston housing 3-1 is divided into two housing bodies by the piston sheet 3-2, and the surfaces of the two housing bodies are provided with the power interface a and the power interface b, wherein the distance between the power interface a and the power interface b is greater than the maximum distance between the stopper 3-4 and the side wall of the double-chamber piston 3.

[0056] The working principle is that the console pipeline is connected with the two ports of the power interface a and the power interface b of the double-chamber piston 3, the console applies force to the power interface a, the chamber force of the power interface a is greater than that of the power interface b, and the piston sheet 3-2 and the piston rod 3-3 move to the side of the power interface b. Similarly, when the power interface b port applies force, the piston sheet 3-2 and the piston rod 3-3 move to the side of the power interface a.

[0057] Referring to Figure 1 and Figure 9 The structure of the injection pipe fixing device 5 is the same as that of the linkage injection pipe fixing assembly 2, and the end of the injection pipe fixing device 5 is reserved with a channel for the piston rod 3-3 to slide in and out.

[0058] Referring to Figure 1 and Figure 9 In a preferred embodiment, the end of the piston housing 2-3 is provided with a second thread, and the end of the injection pipe fixing device 5 is fixedly provided with a third thread matched with the second thread, and the second thread and the third thread are screwed.

[0059] In summary, as shown in Figure 2 the assembly method of the mobile sealing device of the in-situ coal gasification scientific device injection system is as follows:

[0060] 1) Assemble the linkage injection pipe fixing assembly 2 and the connecting piece 4, the double-chamber piston 3 and the injection pipe fixing device 5 first, and then connect the two parts together through the connecting piece 4;

[0061] 2) After the gasification agent injection pipe body 6 passes through the mobile sealing assembly 1 and the linkage injection pipe fixing assembly 2, the double-chamber piston 3, the connecting piece 4, the injection pipe fixing device 5 in sequence, it passes through another mobile sealing assembly 1;

[0062] 3) Tighten all the threads to make the sealing elements play a sealing role;

[0063] 4) Connect all the interfaces to the console.

[0064] In summary, the use method of the mobile sealing device of the in-situ coal gasification scientific device injection system is as follows:

[0065] Moving to the right

[0066] 1) The console applies force to the injection pipe fixing device 5 to fix the gasification agent injection pipe body 6 in the injection pipe fixing device 5, and applies force to the b port in the double-chamber piston 3 to move the piston piece 3-2 to the left;

[0067] 2) The console applies force to the linkage injection pipe fixing assembly 2 to fix the gasification agent injection pipe body 6 in the linkage injection pipe fixing assembly 2, while releasing the force in the injection pipe fixing device 5;

[0068] 3) The console applies force to the a port in the double-chamber piston 3, while the b port releases force, and the piston piece 3-2 moves to the right, at this time the injection pipe body 6 moves to the right with the piston piece 3-2, completing a rightward movement;

[0069] 4) Repeat steps 1, 2, and 3 to achieve equal rightward movement of the gasification agent injection pipe body 6;

[0070] 5) If different distances of movement are to be achieved, the movement distance of the piston piece 3-2 is controlled, and the distance between the linkage injection pipe fixing assembly 2 and the double-chamber piston 3 is measured to achieve the movement;

[0071] Moving to the left

[0072] 1) The console applies force to the injection pipe fixing device 5 to fix the injection pipe body 6 in the injection pipe fixing device 5, and applies force to the a port in the double-chamber piston 3 to move the piston piece 3-2 to the right;

[0073] 2) The console applies force to the linkage injection pipe fixing assembly 2 to fix the injection pipe body 6 in the linkage injection pipe fixing assembly 2, while releasing the force in the injection pipe fixing device 5;

[0074] 3) The console applies force to the b port in the double-chamber piston 3, while the a port releases force, and the piston piece 3-2 moves to the left, while the gasification agent injection pipe body 6 moves to the left, completing a leftward movement;

[0075] 4) Repeat steps 1, 2, and 3 to achieve equal leftward movement of the injection pipe body 6;

[0076] 5) If different distances of movement are to be achieved, the movement distance of the piston piece 3-2 is controlled, and the distance between the linkage injection pipe fixing assembly 2 and the double-chamber piston 3 is measured to achieve the movement.

[0077] In conclusion, the technical scheme provided by the present application has simple structure, can realize the movement and sealing of the gasifying agent injection pipe, realizes the real in-situ coal gasification simulation process, and better serves the field production.

[0078] The above merely describes a preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. The substitution can be a substitution of part of the structure, device, method step, or a complete technical scheme. According to the technical scheme of the present application and the inventive concept, equivalent substitution or change should be covered in the protection scope of the present application.

Claims

1. A movable sealing device for an injection system of an in-situ coal gasification scientific device, characterized in that, The utility model relates to a kind of injection molding machine, including: mobile sealing assembly (1), linkage injection tube fixed assembly (2), double-chamber piston (3), injection tube fixing device (5), injection tube main body (6) and control console; The mobile sealing assembly (1) includes a mobile sealing shell (1-1) and an O-ring (1-2), and the end inner surface of the mobile sealing shell (1-1) is provided with internal threads. The linkage injection tube fixed assembly (2) includes a fixing device shell (2-3) and two injection tube fixing members (2-4) disposed inside the fixing device shell (2-3), which are adapted to the pipeline of the control console. The double-chamber piston (3) includes a piston shell (3-1), a piston sheet (3-2) and a hollow piston rod (3-3), the piston rod (3-3) is fixedly connected to the piston sheet (3-2), one end of the piston rod (3-3) is connected to the linkage injection tube fixed assembly (2), and the piston sheet (3-2) is slidably connected to the inner wall of the piston shell (3-1). The O-ring (1-2) has a certain elastic deformation and is disposed inside the mobile sealing shell (1-1).

2. A mobile sealing device for an in-situ coal gasification scientific device injection system according to claim 1, wherein, The end of the fixing device shell (2-3) is welded with an external thread ring, and the external thread ring is threadedly connected to the internal threads of the end inner surface of the mobile sealing shell (1-1).

3. The mobile sealing device of an in-situ coal gasification scientific device injection system of claim 1, wherein, The other end of the fixing device shell (2-3) is welded with a connecting member (4), and the end of the piston rod (3-3) is fixedly provided with a first screw thread that is threadedly connected to the connecting member (4).

4. The mobile sealing device of an in-situ coal gasification scientific device injection system of claim 1, wherein, The piston shell (3-1) is divided into two chamber shells by the piston sheet (3-2), and the two chamber shells are respectively provided with a power interface a and a power interface b.

5. The mobile sealing device of an in-situ coal gasification scientific device injection system of claim 1, wherein, The end of the piston shell (3-1) is provided with a second screw thread, the end of the injection tube fixing device (5) is fixedly provided with a third screw thread that is adapted to the second screw thread, and the second screw thread is threadedly connected to the third screw thread.

6. The mobile sealing device of an in-situ coal gasification scientific device injection system of claim 1, wherein, The injection tube fixing member (2-4) is a semicircular tube structure, the linkage injection tube fixed assembly (2) further includes two symmetrical power interfaces (2-1) disposed on the outer surface of the fixing device shell (2-3) and a T-shaped metal member (2-2) slidably disposed inside the power interface (2-1), the outer side of the power interface (2-1) is connected to the pipeline on the control console, and the inner side of the power interface (2-1) is a T-shaped structure.

7. A mobile sealing device for an in-situ coal gasification scientific device injection system according to claim 1, wherein, The two side surfaces of the piston sheet (3-2) are fixedly connected to the two hollow piston rods (3-3), the outer surface of the piston rod (3-3) is provided with a positioner (3-4), and the injection tube main body (6) is slidably connected to the inner wall of the piston rod (3-3).

8. The mobile sealing device of an in-situ coal gasification scientific device injection system of claim 1, wherein, The structure of the injection tube fixing device (5) is the same as that of the linkage injection tube fixed assembly (2), and the end of the injection tube fixing device (5) is reserved with a channel for the piston rod (3-3) to slide in and out.

9. The mobile sealing device of an in-situ coal gasification scientific device injection system of claim 1, wherein, ​

Images