A preheating and pressure regulating device for alternating gas injection into oil shale

Abstract

The present application discloses a preheating and pressure-regulating device for alternating gas injection of oil shale, which comprises: a shell, a supporting foot, an upper cover, an air outlet pipe, a temperature sensor, an inlet pipe, an electrically controlled valve, a flow sensor, a pressure sensor, a control cabinet, an impeller, a rotating shaft, an air outlet plate, a bearing, an inner gear ring, a through hole, an upper disc, a heat-conducting straight pipe, a heat-conducting tooth, a cylindrical gear, an annular groove, an annular seat, a connecting block, a power supply plug, a fixed outer ring seat, a first flexible rubber ring sheet, a second flexible rubber ring sheet, a heating rod, a supporting seat, a ball bearing, a fixed annular ring, an annular groove, a cam, an annular conductive sheet, an annular slide groove, a fixed carrier sleeve, an annular carrier groove and an annular edge sheet. The benefit of the present application is that it is heated by a plurality of heating rods, and the heating rods are evenly installed at the bottom of the upper disc, so that the heating rods can rotate with the upper disc, thereby facilitating the heating of the gas inside the shell and improving the uniformity of heating.

Description

Technical Field

[0001] The present invention relates to a preheating and pressure regulating device, in particular to a preheating and pressure regulating device for alternating gas injection into oil shale, belonging to the technical field of shale oil exploitation. Background Art

[0002] Shale oil is the in situ retained oil and gas resources contained in shale formations dominated by shale. The closure boundaries are not obvious and it is impossible to form natural industrial production capacity. Currently, in the simulation analysis of shale oil, CO2 / N2 alternating displacement injection is often used. During the injection, it needs to be preheated and pressure-regulated by preheating and pressure-regulating equipment.

[0003] Existing preheating and pressure-regulating equipment, when performing gas preheating and pressure-regulating, has a fixed heating element after gas enters the system. This can lead to uneven heating of the passing gas, making it difficult to uniformly heat the internal gas. Furthermore, the small heating contact area hinders heat transfer, potentially resulting in poor heat transfer. Currently, there is no preheating and pressure-regulating equipment suitable for alternating gas injection into oil shale. Summary of the Invention

[0004] In order to address the deficiencies of the prior art, the present application provides a preheating and pressure regulating device for alternating gas injection into oil shale, which is used to solve the problems of uneven preheating and heating in the prior art.

[0005] It is further used to solve the problem in the prior art that it is difficult to provide a uniform and dispersed airflow for the heating component after the gas enters.

[0006] According to one aspect of the present application, a preheating and pressure-regulating device for alternating gas injection into oil shale is provided, comprising: a shell, supporting legs, an upper cover, an air outlet pipe, a temperature sensor, an inlet pipe, an electrically controlled valve, a flow sensor, a pressure sensor, an upper disc, a heating rod, a heat-conducting straight pipe, and heat-conducting teeth; wherein, a plurality of supporting legs distributed in a circular array are fixedly installed around the bottom edge of the shell, an upper cover is seamlessly welded to the top opening of the shell, an air outlet pipe is fixedly connected to the top of the upper cover, the air outlet pipe is communicated with the upper cover, a temperature sensor is fixedly installed on the wall of the air outlet pipe, and a side wall of the shell An inlet pipe is fixedly installed at the bottom, and the inlet pipe is connected to the bottom of the shell. The end of the inlet pipe away from the shell is connected to an electric control valve through a flange, and a flow sensor is fixedly installed on the pipe wall of the inlet pipe; a rotatable upper disc is provided inside the shell, and the upper disc is arranged horizontally and located at the top opening of the shell, and a number of heating rods are fixedly installed on the bottom of the upper disc, and the heating rods are arranged vertically, and the outsides of the several heating rods are all provided with rotatable heat-conducting straight pipes, and a number of heat-conducting teeth are evenly fixedly installed on the outer wall of the heat-conducting straight pipes; a pressure sensor is fixedly installed on one side of the shell.

[0007] Furthermore, a rotating shaft is fixedly connected to the middle of the upper disc, the rotating shaft is vertically arranged, and the bottom end of the rotating shaft is rotatably connected to the center of the bottom inner wall of the shell. An impeller is fixedly sleeved on the rotating shaft, and the impeller is located above the bottom inner wall of the shell. An air outlet plate is provided above the impeller, and a plurality of through holes are evenly opened on the surface of the air outlet plate.

[0008] Furthermore, a through groove is provided in the middle of the air outlet plate, and a second flexible rubber ring piece is arranged in the through groove, and the second flexible rubber ring piece is a circular ring structure, and the outer ring of the second flexible rubber ring piece is fixedly connected to the groove wall of the through groove, and the inner ring of the second flexible rubber ring piece is embedded with a bearing, and the inner ring of the bearing is fixedly sleeved on the cylindrical surface of the rotating shaft, and the outer ring of the bearing is fixedly connected to the inner ring of the second flexible rubber ring piece, and the cylindrical surface of the air outlet plate is sleeved with a first flexible rubber ring piece, and the first flexible rubber ring piece is a circular ring structure, and the inner ring of the first flexible rubber ring piece is fixedly connected to the cylindrical surface of the air outlet plate, and the outer ring of the first flexible rubber ring piece is fixedly sleeved with a fixed outer ring seat, and the outer ring of the fixed outer ring seat is fixedly welded to the inner wall of the shell.

[0009] Furthermore, support seats are provided on both sides of the bottom of the air outlet plate and in the middle of the bottom of the air outlet plate. One end of the support seat is fixedly connected to the bottom of the fixed outer ring seat and the cylindrical surface of the rotating shaft. A ball groove is provided above the support seat, and a ball is embedded in the ball groove, and the ball is in contact with the bottom of the air outlet plate.

[0010] Furthermore, a fixed ring is fixedly installed on the upper surface of the air outlet plate, and a ring embedding groove is opened on the inner circle of the fixed ring. The ring embedding groove is embedded with one end of the cam, and the cam is fixedly sleeved on the cylindrical surface of the rotating shaft.

[0011] Furthermore, the bottoms of several of the heat-conducting straight pipes are fixedly sleeved with cylindrical gears, and the several cylindrical gears form two gear sets, and the two adjacent cylindrical gears in the two gear sets are meshed and connected, and the cylindrical gear located at the end of the gear set away from the rotating shaft is meshed and connected with an inner gear ring, and the outer ring of the inner gear ring is fixedly welded to the inner wall of the shell.

[0012] Furthermore, four connecting blocks are evenly fixedly installed on the cylindrical surface of the upper disc, the connecting blocks are fixedly connected to a circular ring seat, and the circular ring seat surrounds the disc, and a power plug is fixedly connected to the circular ring seat, and the power plug is electrically connected to the heating rod.

[0013] Furthermore, an annular groove is provided on the inner wall of the shell, and two annular conductive sheets are fixedly installed inside the annular groove. An insulating wrapping layer is provided between the connection between the annular conductive sheets and the groove wall of the annular groove. The annular conductive sheets are in contact with the end sheet of the power plug. Annular sliding grooves are provided above and below the annular groove, and the annular sliding grooves are connected with the annular seat with a clearance fit.

[0014] Furthermore, the top end of the heat-conducting straight pipe is provided with a fixed carrier sleeve, and the fixed carrier sleeve is fixedly connected to the bottom of the upper disc. The inner ring of the fixed carrier sleeve is provided with a circular carrier groove, and the circular carrier groove is gap-fittedly connected to the circular edge piece of the fixed sleeve connected to the top end of the heat-conducting straight pipe.

[0015] Furthermore, a control cabinet is fixedly installed on one side wall of the shell, and the control cabinet is electrically connected to the temperature sensor, the electric control valve, the flow sensor, the pressure sensor and the heating rod.

[0016] The benefit of the present application is that: this type of preheating and pressure-regulating equipment is used for alternating gas injection into oil shale, and the gas is preheated and pressure-regulated by a plurality of heating rods. At the same time, the heating rods are evenly installed at the bottom of the upper disc, so that the heating rods can rotate with the upper disc, thereby facilitating the heating of the gas inside the shell and improving the uniformity of heating. Furthermore, each heating rod is provided with a heat-conducting straight pipe, and the outer wall of the heat-conducting straight pipe has heat-conducting teeth, thereby increasing the contact area for heating and facilitating the diffusion and transfer of heating heat. Furthermore, when the upper disc rotates, the heat-conducting straight pipe can also rotate on its own, thereby further improving the uniformity of heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings that constitute part of this application are used to provide a further understanding of this application and make other features, objects and advantages of this application more apparent. The illustrative embodiment drawings of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application. In the drawings:

[0018] Figure 1 This is a structural schematic diagram of a preheating and pressure regulating device for alternating gas injection into oil shale according to an embodiment of the present application;

[0019] Figure 2 yes Figure 1 A schematic diagram of the structure inside the housing in the illustrated embodiment;

[0020] Figure 3 yes Figure 1 A schematic structural diagram of the installation of the air outlet plate in the embodiment shown;

[0021] Figure 4 yes Figure 1 A schematic structural diagram of the positional relationship between the impeller and the inlet pipe in the embodiment shown;

[0022] Figure 5 yes Figure 1 A schematic structural diagram of the fixed ring and the cam in the embodiment shown;

[0023] Figure 6 yes Figure 1 A schematic diagram of the structure inside the annular groove in the embodiment shown;

[0024] Figure 7 yes Figure 1 A schematic structural diagram of one side of the inner portion of the annular groove in the embodiment shown;

[0025] Figure 8 yes Figure 1 A schematic structural diagram of the installation of the heat-conducting straight pipe in the embodiment shown;

[0026] Figure 9 yes Figure 1 A schematic diagram of the arrangement of cylindrical gears and the connection between the cylindrical gears and the internal gear ring in the illustrated embodiment;

[0027] Figure 10 yes Figure 1 Schematic diagram of the working principle in the embodiment shown.

[0028] The meanings of the reference numerals in the figures are as follows: 1. housing; 2. support leg; 3. upper cover; 4. air outlet pipe; 5. temperature sensor; 6. inlet pipe; 7. electric control valve; 8. flow sensor; 9. pressure sensor; 10. control cabinet; 11. impeller; 12. rotating shaft; 13. air outlet plate; 14. bearing; 15. internal gear ring; 16. through hole; 17. upper disc; 18. heat conducting straight pipe; 19. heat conducting tooth; 20. cylindrical gear; 21. Annular groove; 22. Annular seat; 23. Connecting block; 24. Power supply plug; 25. Fixed outer ring seat; 26. First flexible rubber ring piece; 27. Second flexible rubber ring piece; 28. Heating rod; 29. ​​Support seat; 30. Ball; 31. Fixed circular ring; 32. Annular groove; 33. Cam; 34. Annular conductive sheet; 35. Annular slide groove; 36. Fixed carrier sleeve; 37. Annular carrier groove; 38. Annular edge piece. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0032] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to express a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0033] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," and "socketed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0034] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] Reference Figures 1 to 10A preheating and pressure regulating device for alternating gas injection into oil shale comprises: a shell 1, supporting legs 2, an upper cover 3, an air outlet pipe 4, a temperature sensor 5, an inlet pipe 6, an electrically controlled valve 7, a flow sensor 8, a pressure sensor 9, an upper disc 17, a heating rod 28, a heat-conducting straight pipe 18, and a heat-conducting tooth 19; wherein, a plurality of supporting legs 2 distributed in a circular array are fixedly installed around the bottom edge of the shell 1, the upper cover 3 is seamlessly welded to the top opening of the shell 1, the top of the upper cover 3 is fixedly connected to the air outlet pipe 4, and the air outlet pipe 4 is connected to the heat-conducting tooth 19. The upper cover body 3 is connected, a temperature sensor 5 is fixedly installed on the wall of the air outlet pipe 4, an inlet pipe 6 is fixedly installed at the bottom of one side wall of the shell 1, the inlet pipe 6 is connected to the bottom of the shell 1, and the end of the inlet pipe 6 away from the shell 1 is connected to the electric control valve 7 through a flange, and a flow sensor 8 is fixedly installed on the wall of the inlet pipe 6; a rotatable upper disc 17 is provided inside the shell 1, the upper disc 17 is horizontally arranged, and the upper disc 17 is located at the top opening of the shell 1, and the bottom of the upper disc 17 is fixedly installed with several A heating rod 28 is provided, and the heating rod 28 is arranged vertically. The outside of several of the heating rods 28 is provided with a rotatable heat-conducting straight pipe 18, and several heat-conducting teeth 19 are evenly fixedly installed on the outer wall of the heat-conducting straight pipe 18; a pressure sensor 9 is fixedly installed on one side of the shell 1, wherein the electric control valve 7 is connected to the nitrogen cylinder and the carbon dioxide cylinder through the external pipeline, and the gas is supplied through the nitrogen cylinder and the carbon dioxide cylinder respectively, and the flow rate is controlled by the electric control valve 7 to control the flow rate entering the inlet pipe 6, and enters the shell through the inlet pipe 6. 1, and is further heated by the heating rod 28 under the upper disc 17. The heating rod 28 is provided with a heat-conducting straight pipe 18, and the outside of the heat-conducting straight pipe 18 is provided with a heat-conducting tooth 19, thereby greatly improving the heating and heat dissipation area, facilitating the uniform heating of the incoming gas. At the same time, during heating, the heating plate 28 can rotate together with the upper disc 17, and the heat-conducting straight pipe 18 can rotate about the axis of the heating rod 28, thereby facilitating contact with the gas in the shell 1, facilitating the dissipation of heat, and making the whole have a better and uniform heating effect.

[0036] like Figure 2 and Figure 4As shown, as a specific solution, a rotating shaft 12 is fixedly connected to the middle of the upper disc 17, the rotating shaft 12 is vertically arranged, and the bottom end of the rotating shaft 12 is rotatably connected to the center of the bottom inner wall of the shell 1, and an impeller 11 is fixedly sleeved on the rotating shaft 12, and the impeller 11 is located above the bottom inner wall of the shell 1, and an air outlet plate 13 is provided above the impeller 11. A plurality of through holes 16 are evenly opened on the surface of the air outlet plate 13, wherein the material entering through the inlet pipe 6 has flow pressure, thereby pushing the impeller 11, and the impeller 11 is installed on the rotating shaft 12, so that the rotating shaft 12 can rotate on its own. When material continuously enters the bottom position of the shell from the inlet pipe 6, the rotating shaft 12 can rotate continuously, thereby driving the upper disc 17 on the rotating shaft 12 to rotate together, so that the heating component structure at the bottom of the upper disc 17 rotates together, so that the heating component structure directly contacts the gas in various areas inside the shell 1, directly heats, and ensures heating uniformity.

[0037] like Figure 3As shown, as a specific solution, a through groove is opened in the middle of the air outlet plate 13, and a second flexible rubber ring piece 27 is arranged in the through groove. The second flexible rubber ring piece 27 is a circular ring structure, and the outer ring of the second flexible rubber ring piece 27 is fixedly connected to the groove wall of the through groove. The inner ring of the second flexible rubber ring piece 27 is embedded with a bearing 14, and the inner ring of the bearing 14 is fixedly sleeved on the cylindrical surface of the rotating shaft 12. The outer ring of the bearing 14 is fixedly connected to the inner ring of the second flexible rubber ring piece 27. The cylindrical surface of the air outlet plate 13 is sleeved with a first Flexible rubber ring piece 26, the first flexible rubber ring piece 26 is a circular ring structure, the inner ring of the first flexible rubber ring piece 26 is fixedly connected to the cylindrical surface of the air outlet plate 13, the outer ring of the first flexible rubber ring piece 26 is fixedly sleeved with a fixed outer ring seat 25, the outer ring of the fixed outer ring seat 25 is fixedly welded to the inner wall of the shell 1, wherein the air outlet plate 13 is used to guide the material in the bottom of the shell 1 so that it is dispersed through the evenly distributed through holes 16, so that the material gas is diffused at the bottom of the heated component structure, and there is no gap between adjacent through holes 16. In order to further evenly diffuse the airflow through the area of ​​the airflow, the air outlet plate 13 can be moved within a certain range on the horizontal plane, wherein a through slot is provided in the middle of the air outlet plate 13, which provides a position space for the air outlet plate 13, and the movement of the air outlet plate 13 will not be affected by the rotating shaft 12. In order to connect and bear the air outlet plate 13, a second flexible rubber ring piece 27 is provided for connection. The second flexible rubber ring piece 27 can be deformed and a certain width is reserved, so that it can be pulled to unfold or fold, so as to meet the movement of the air outlet plate 13 without Affected, the purpose of setting the first flexible rubber ring piece 26 is the same as that of the second flexible rubber ring piece 27, which is used for the installation and bearing around the air outlet plate 13. At the same time, a certain width is reserved so that it can be pulled to unfold or fold to meet the movement of the air outlet plate 13 without being affected. A bearing 14 is provided to achieve the rotatable installation of the rotating shaft 12 and the second flexible rubber ring piece 27, so that when the rotating shaft 12 rotates, the rotating shaft 12 can rotate relative to the second flexible rubber ring piece 27 without driving the second flexible rubber ring piece 27 to rotate.

[0038] like Figure 3As shown, as a specific solution, support seats 29 are provided on both sides of the bottom of the air outlet plate 13 and at the middle position of the bottom of the air outlet plate 13, one end of the support seat 29 is fixedly connected to the bottom of the fixed outer ring seat 25 and the cylindrical surface of the rotating shaft 12, and a ball groove is provided above the support seat 29, and a ball 30 is embedded in the ball groove, and the ball 30 contacts the bottom of the air outlet plate 13. In order to improve the bearing effect of the bottom of the air outlet plate 13, a support seat 29 is added, and the ball 30 on the support seat 29 contacts the bottom of the air outlet plate 13 to carry out bearing, so that the gravity of the air outlet plate 13 acts on the fixed outer ring seat 25, and then acts on the shell 1, and the gravity of the air outlet plate 13 is shared by the rotating shaft 12, thereby realizing bearing, and at the same time, rolling friction during bearing is realized through the ball 30, that is, rolling friction is carried out when the air outlet plate 13 moves, thereby reducing frictional resistance and wear.

[0039] like Figure 5 As shown, as a specific solution, a fixing ring 31 is fixedly installed on the upper surface of the air outlet plate 13, and a ring embedding groove 32 is opened on the inner ring of the fixing ring 31, and the ring embedding groove 32 is embedded with one end of the cam 33. The cam 33 is fixedly sleeved on the cylindrical surface of the rotating shaft 12, and the axis of the rotating shaft 12 does not coincide with the axis of the fixing ring 31. When the rotating shaft 12 rotates, the cam 33 on the rotating shaft 12 will rotate together. The distances between the two ends of the cam 33 and the axis of the rotating shaft 12 are not relative, and the end of the cam 33 with the larger distance from the axis of the rotating shaft 12 contacts the inner ring of the fixing ring 31, so that the cam 33 can rotate smoothly. When the rotating shaft 12 rotates, the cam 33 contacts different positions around the inner circle of the fixed ring 31. In order to make it contact, the position of the fixed ring 31 will be driven by the cam 33, thereby causing the horizontal position to change. The fixed ring 31 and the air outlet plate 13 are in a fixed state, so that the air outlet plate 13 will move together with the fixed ring 31, so that the air outlet plate 13 continuously changes its horizontal position, and the position of the through hole 16 will also change accordingly, which can provide uniform airflow material for the heating component structure at the bottom of the upper disc 17, thereby ensuring the effect of uniform heating and preheating.

[0040] The cam 33 is fixed, and one end of the cam 33 is embedded in the ring groove 32 on the inner ring of the fixed ring 31, thereby providing a vertical limit for the fixed ring 31 and thus providing a vertical position limit for the air outlet plate 13.

[0041] like Figure 9As shown, as a specific solution, the bottoms of several of the heat-conducting straight pipes 18 are fixedly sleeved with cylindrical gears 20, and several of the cylindrical gears 20 form two gear sets, and the two adjacent cylindrical gears 20 in the two gear sets are meshed and connected, and the cylindrical gear 20 located at the end of the gear set away from the rotating shaft 12 is meshed and connected with the inner gear ring 15, and the outer ring of the inner gear ring 15 is fixedly welded to the inner wall of the shell 1, and the gear set is composed of cylindrical gears 20 to form a spirally bent linear structure. Through the two gear sets, the cylindrical gears 20 cover the space inside the inner gear ring 15, ensuring the utilization of space and the installation number of heating rods 28, while the heat-conducting straight pipes 18 therein can be driven to rotate, wherein the upper disc 17 is driven by the rotating shaft 12 to rotate, while the heating rods and heat-conducting straight pipes 18 thereon Will rotate together, wherein the inner gear ring 15 is in a fixed state, and each of the two gear sets has a cylindrical gear 20 meshing with the inner gear ring 15, and the cylindrical gear 20 can move on the inner gear ring, and the inner gear ring 15 is fixed, so that the cylindrical gear 20 can rotate, and the cylindrical gear 20 rotates, and the heat-conducting straight pipe 18 thereon will also rotate together, and the adjacent cylindrical gears 20 in the two gear sets are in a meshing state. When one cylindrical gear 20 in the gear set is rotating, all the cylindrical gears 20 therein will also rotate together, thereby driving all the heat-conducting straight pipes 18 to rotate together, ensuring that the heat-conducting teeth 19 rotate and rotate with the heat-conducting straight pipes 18. When rotating, it can contact the gas in more different internal areas of the shell 1 for heating, thereby ensuring the uniformity of heating, wherein as Figure 9 It is a schematic diagram, in which the teeth on the cylindrical gear 20 and the teeth on the inner ring of the internal gear ring 15 are not drawn, but both have teeth and are meshed.

[0042] like Figure 6 and Figure 7 As shown, as a specific solution, four connecting blocks 23 are evenly fixedly installed on the cylindrical surface of the upper disc 17, and the connecting blocks 23 are fixedly connected to the annular seat 22, and the annular seat 22 surrounds the disc. A power plug 24 is fixedly connected to the annular seat 22, and the power plug 24 is electrically connected to the heating rod 28. The upper disc 17 has grooves inside for laying out the circuit, and the circuit is used to connect the power plug 24 and the heating rod 28. The annular seat 22 provides an installation position for the power plug 24, so that both ends of the power plug 24 have a load-bearing and fixed structure.

[0043] As shown Figure 7As shown, as a specific solution, an annular groove 21 is provided on the inner wall of the housing 1, and two annular conductive sheets 34 are fixedly installed inside the annular groove 21. An insulating wrapping layer is provided between the annular conductive sheet 34 and the groove wall connection of the annular groove 21. The annular conductive sheet 34 contacts the end piece of the power plug 24. An annular groove 35 is provided above and below the annular groove 21. The annular groove 35 is connected with the annular seat 22 with a clearance fit. The insulating wrapping layer can be made of ceramic material. The circular conductive sheet 34 is made of a material and is insulated. The circular conductive sheet 34 is connected to an external power source through a wire for power supply. The circular conductive sheet 34 is in contact with the end piece of the power supply plug 24, thereby powering the heating rod 28. When performing a circular motion, the end piece of the power supply plug 24 can move on the surface of the circular conductive sheet 34, and it always maintains a contact state, so that it is always in a power supply state when rotating. The circular seat 22 is positioned by the circular slide groove 35, which can play a role in rotation guidance when rotating.

[0044] like Figure 8 As shown, as a specific solution, the top end of the heat-conducting straight pipe 18 is provided with a fixed carrier sleeve 36, and the fixed carrier sleeve 36 is fixedly connected to the bottom of the upper disc 17. The inner ring of the fixed carrier sleeve 36 is provided with an annular carrier groove 37, and the annular carrier groove 37 is loosely connected with the annular edge piece 38 fixedly sleeved at the top end of the heat-conducting straight pipe 18. By setting the fixed carrier sleeve 36, the annular carrier groove 37 and the annular edge piece 38, the rotational installation of the top end of the heat-conducting straight pipe 18 and the bottom end of the upper disc 17 is realized, and the heat-conducting straight pipe 18 can rotate. During rotation, the heat-conducting straight pipe 18 is always in contact with the heating rod 28 for heat conduction for heat transfer. The heat-conducting straight pipe 18 and the heat-conducting teeth 19 are both made of heat-conducting metal materials, such as copper, and the heating rod 28 is a ceramic heating rod for heating.

[0045] A control cabinet 10 is fixedly installed on one side wall of the shell 1. The control cabinet 10 is electrically connected to the temperature sensor 5, the electric control valve 7, the flow sensor 8, the pressure sensor 9 and the heating rod 28. When the entire device is in use, an external power supply is used to power each component. The electric control valve 7 is used to control the gas flow rate. The flow sensor 8 provides sensing feedback, and the temperature sensor 5 provides sensing feedback to control the heating rod 28. The voltage of the power supply connected to the control ring conductive sheet 34 is controlled to achieve the control of the heating temperature of the heating rod. The control cabinet 10 has a single-chip microcomputer controller inside for control and transmission of sensor feedback signals. At the same time, the surface of the control cabinet 10 has a display screen and control buttons for display and manual operation.

[0046] The technical solution of the present application can drive the rotation of the heating rod 28, so that the heat-conducting straight pipe 18 and the heat-conducting teeth 19 rotate together, and the heat-conducting straight pipe 18 can also rotate, so that the overall heating and preheating have higher uniformity. At the same time, the air outlet plate 13 will move together with the fixed ring 31, so that the air outlet plate 13 continuously changes its horizontal position, and the position of the through hole 16 will also change accordingly, which can provide uniform airflow material for the heating component structure at the bottom of the upper disc 17, thereby ensuring the effect of uniform heating and preheating.

[0047] The foregoing description is merely a specific embodiment of the present application and is not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A preheating and pressure regulating device for alternating gas injection into oil shale, characterized by: include: Shell (1), supporting legs (2), upper cover (3), air outlet pipe (4), temperature sensor (5), inlet pipe (6), electric control valve (7), flow sensor (8), pressure sensor (9), upper disc (17), heating rod (28), heat conducting straight pipe (18) and heat conducting teeth (19); A plurality of supporting legs (2) distributed in a circular array are fixedly installed around the bottom edge of the shell (1); an upper cover body (3) is seamlessly welded to the top opening of the shell (1); an air outlet pipe (4) is fixedly connected to the top of the upper cover body (3); the air outlet pipe (4) is communicated with the upper cover body (3); a temperature sensor (5) is fixedly installed on the pipe wall of the air outlet pipe (4); an inlet pipe (6) is fixedly installed at the bottom of one side wall of the shell (1); the inlet pipe (6) is communicated with the bottom of the shell (1); an end of the inlet pipe (6) away from the shell (1) is connected to an electric control valve (7) through a flange; a flow sensor (8) is fixedly installed on the pipe wall of the inlet pipe (6); A rotatable upper disc (17) is provided inside the shell (1), the upper disc (17) is arranged horizontally, and the upper disc (17) is located at the top opening of the shell (1), a plurality of heating rods (28) are fixedly installed on the bottom of the upper disc (17), and the heating rods (28) are arranged vertically, and the outsides of the plurality of heating rods (28) are all sleeved with rotatable heat-conducting straight pipes (18), and a plurality of heat-conducting teeth (19) are evenly fixedly installed on the outer wall of the heat-conducting straight pipes (18); a pressure sensor (9) is fixedly installed on one side of the shell (1); A rotating shaft (12) is fixedly connected to the middle of the upper disc (17), the rotating shaft (12) is vertically arranged, and the bottom end of the rotating shaft (12) is rotatably connected to the center of the bottom inner wall of the shell (1), and an impeller (11) is fixedly sleeved on the rotating shaft (12), and the impeller (11) is located above the bottom inner wall of the shell (1). An air outlet plate (13) is arranged above the impeller (11), and a surface of the air outlet plate (13) is evenly provided with a plurality of through holes (16); A through groove is provided in the middle of the air outlet plate (13), and a second flexible rubber ring piece (27) is provided in the through groove. The second flexible rubber ring piece (27) is a circular ring structure. The outer ring of the second flexible rubber ring piece (27) is fixedly connected to the groove wall of the through groove. The inner ring of the second flexible rubber ring piece (27) is embedded with a bearing (14). The inner ring of the bearing (14) is fixedly sleeved on the cylindrical surface of the rotating shaft (12). The outer ring of the bearing (14) is fixedly connected to the inner ring of the second flexible rubber ring piece (27). A first flexible rubber ring piece (26) is sleeved on the cylindrical surface of the air outlet plate (13). The first flexible rubber ring piece (26) is a circular ring structure. The inner ring of the first flexible rubber ring piece (26) is fixedly connected to the cylindrical surface of the air outlet plate (13). The outer ring of the first flexible rubber ring piece (26) is fixedly sleeved with a fixed outer ring seat (25). The fixed outer ring seat (25) is fixedly sleeved with a fixed outer ring seat (25). 5) is fixedly welded to the inner wall of the shell (1); support seats (29) are provided on both sides of the bottom of the air outlet plate (13) and at the middle position of the bottom of the air outlet plate (13); one end of the support seats (29) on both sides of the bottom of the air outlet plate (13) is fixedly connected to the bottom of the fixed outer ring seat (25); one end of the support seat (29) at the middle position of the bottom of the air outlet plate (13) is fixedly connected to the cylindrical surface of the rotating shaft (12); the support seats A ball groove is provided above (29), wherein a ball (30) is embedded in the ball groove, and the ball (30) contacts the bottom of the air outlet plate (13); a fixed ring (31) is fixedly installed on the upper surface of the air outlet plate (13), and a ring embedding groove (32) is provided on the inner ring of the fixed ring (31), and the ring embedding groove (32) is embedded with one end of a cam (33), and the cam (33) is fixedly sleeved on the cylindrical surface of the rotating shaft (12).

2. The preheating and pressure regulating equipment for oil shale alternating gas injection according to claim 1, characterized in that: The bottoms of the plurality of heat-conducting straight pipes (18) are fixedly sleeved with cylindrical gears (20), and the plurality of cylindrical gears (20) form two gear sets, and two adjacent cylindrical gears (20) in the two gear sets are meshed and connected, and the cylindrical gear (20) located at one end of the gear set away from the rotating shaft (12) is meshed and connected with an inner gear ring (15), and the outer ring of the inner gear ring (15) is fixedly welded to the inner wall of the housing (1).

3. The preheating and pressure regulating equipment for oil shale alternating gas injection according to claim 1, characterized in that: Four connecting blocks (23) are evenly fixedly installed on the cylindrical surface of the upper disc (17), the connecting blocks (23) are fixedly connected to a circular ring seat (22), and the circular ring seat (22) surrounds the disc, and a power plug (24) is fixedly connected to the circular ring seat (22), and the power plug (24) is electrically connected to the heating rod (28).

4. The preheating and pressure regulating equipment for oil shale alternating gas injection according to claim 3, characterized in that: An annular groove (21) is provided on the inner wall of the housing (1), two annular conductive sheets (34) are fixedly installed inside the annular groove (21), an insulating wrapping layer is provided between the connection between the annular conductive sheets (34) and the groove wall of the annular groove (21), the annular conductive sheets (34) are in contact with the end sheet of the power supply plug (24), annular sliding grooves (35) are provided above and below the annular groove (21), and the annular sliding grooves (35) are connected to the annular seat (22) with a clearance fit.

5. The preheating and pressure regulating equipment for oil shale alternating gas injection according to claim 1, characterized in that: The top end of the heat-conducting straight pipe (18) is provided with a fixed carrier sleeve (36), and the fixed carrier sleeve (36) is fixedly connected to the bottom of the upper disc (17). The inner ring of the fixed carrier sleeve (36) is provided with a circular carrier groove (37), and the circular carrier groove (37) is connected with the circular edge piece (38) fixedly sleeved at the top end of the heat-conducting straight pipe (18) in a clearance fit.

6. The preheating and pressure regulating equipment for oil shale alternating gas injection according to claim 1, characterized in that: A control cabinet (10) is fixedly mounted on one side wall of the housing (1), and the control cabinet (10) is electrically connected to the temperature sensor (5), the electric control valve (7), the flow sensor (8), the pressure sensor (9) and the heating rod (28).

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