Thermal resistor of catalytic cracking unit

Abstract

The invention discloses a thermal resistor of a catalytic cracking unit, and belongs to the technical field of temperature detection devices, the thermal resistor of the catalytic cracking unit comprises a wiring part and an end cover seat, and the lower end face of the end cover seat is coaxially and fixedly connected with a connecting seat; the temperature sensing element penetrates through the connecting seat, and the lower end face of the temperature sensing element is flush with the lower end face of the connecting seat; the rotating seat is rotationally sleeved at the lower end of the connecting seat, and a plurality of temperature-sensing conductive rods are arranged on the end surface of the rotating seat in a penetrating manner and are matched with the temperature-sensing element for use; and the rotating unit is arranged on the end cover seat and is used for driving the rotating seat to axially rotate around the rotating seat. According to the invention, the temperature-sensing conductive rod extends to each position in the external reactor, and the rotating seat is driven to rotate through the rotating unit, so that the temperature-sensing conductive rod and the temperature-sensing element are electrically connected alternately, and the temperature-sensing conductive rod and the temperature-sensing element are electrically connected alternately; therefore, temperature detection of different positions in the external reactor is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of temperature detection devices, and in particular relates to a thermal resistor for a catalytic cracking device. Background Art

[0002] Catalytic cracking is an important oil refining process, mainly used to improve the output and quality of gasoline, and also produce other light oil products. Its basic principle is to crack heavy oil (such as vacuum residue) into light oil products (such as gasoline, kerosene, diesel, etc.) under the action of catalyst. The main steps of catalytic cracking: 1) Raw material pretreatment: Before entering the catalytic cracking unit, the crude oil needs to be pretreated to remove impurities and moisture to ensure the quality of the raw materials.

[0003] 2) Reaction regeneration system: Reaction part: The crude oil contacts the catalyst in the reactor and undergoes a cracking reaction under the action of high temperature (about 450-530°C) and the catalyst.

[0004] Regeneration part: The catalyst will become deactivated due to carbon deposits during the reaction and needs to be regenerated regularly, usually by burning off the carbon deposits to restore the activity of the catalyst.

[0005] 3) Product separation: The products after the reaction are separated by a distillation tower to obtain products of different fractions, such as gasoline, diesel, liquefied petroleum gas, etc.

[0006] During the catalytic cracking operation, a thermal resistor is needed to detect the temperature inside the reactor. Existing thermal resistors usually use the property that the resistance value of a metal conductor increases with the increase of temperature to measure the temperature, thereby realizing the detection of the temperature inside the reactor. For example, the patent publication number is: CN 204241120 U discloses a mounting structure of a thermal resistor for measuring the temperature of a boiler flue, which relates to the mounting structure of a thermal resistor. It includes a sleeve, one end of the sleeve is sealed and welded to the boiler wall, the other end of the sleeve is sealed and connected to a circular end cover, the center of the circular end cover is sealed and connected to a thermal resistor, one end of the temperature measuring element of the thermal resistor passes through the sleeve and extends into the boiler flue, and one end of the thermal resistor is set with a terminal outside the circular end cover. The present invention isolates the terminal of the thermal resistor outside the boiler to avoid the disconnection of the resistor terminal caused by water vapor and dust, improves the reliability of boiler operation, and extends the service life of the thermal resistor.

[0007] This method can only detect the temperature of a fixed area inside the reactor, resulting in a small detection range and low accuracy of the detection results. Summary of the invention

[0008] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a thermal resistor for a catalytic cracking device.

[0009] The technical solution adopted to solve the above technical problems is: A thermal resistor for a catalytic cracking unit, comprising a connection portion of the thermal resistor, and further comprising: An end cap seat detachably connected to the lower end of the wiring portion, wherein the lower end surface of the end cap seat is coaxially fixedly connected with a connecting seat; A temperature sensing element is inserted into the connecting seat, and the lower end surface of the temperature sensing element is flush with the lower end surface of the connecting seat; A rotating seat rotatably mounted on the lower end of the connecting seat, wherein a plurality of temperature-sensitive conductive rods are provided on the end surface of the rotating seat, and the temperature-sensitive conductive rods are used in conjunction with the temperature-sensitive element; A rotating unit is arranged on the end cover seat, and the rotating unit is used to drive the rotating seat to rotate around its own axis.

[0010] Furthermore, a bearing installation groove is provided on the periphery of the connecting seat, a bearing is installed in the bearing installation groove, and the rotating seat is fixedly sleeved on the outer ring of the bearing.

[0011] Furthermore, an internal threaded hole is provided on the end surface of the end cover seat, and the wiring portion is provided with a threaded portion threadedly connected to the internal threaded hole.

[0012] Furthermore, a conductive plate is estimated to be provided at the lower end of the temperature sensing element, and the conductive plate is used in conjunction with the temperature-sensitive conductive rod.

[0013] Furthermore, the rotating unit includes an ear plate fixedly connected to the periphery of the end cover seat, a servo motor is vertically mounted on the ear plate, the output shaft of the servo motor is drivingly connected to a connecting sleeve, a driving gear is coaxially fixedly sleeved on the lower end of the connecting sleeve, a driven gear is fixedly sleeved on the periphery of the rotating seat, and the driving gear is meshed with the driven gear for transmission.

[0014] Furthermore, a lifting device is provided in the rotating seat, and the lifting device is used to drive one of the temperature-sensitive conductive rods to move upward when the rotating seat rotates, so that the conductive plate abuts against the end of the temperature-sensitive conductive rod and is electrically connected.

[0015] Furthermore, the lifting device includes an ear block fixedly connected to the periphery of the rotating seat, a swing arm is hinged on the ear block, the swing arm is provided with a through slot for the ear block to pass freely, a floating frame is fixedly connected to the lower end of the swing arm, the floating frame is provided with a clearance slot for the temperature-sensitive conductive rod to pass freely, a frustum is fixedly connected to the lower end surface of the driving gear, the outer diameter of the frustum decreases from top to bottom, the upper end of the swing arm is used in conjunction with the frustum, a pulling assembly for driving the temperature-sensitive conductive rod to move downward is provided in the rotating seat, and the swing arm is connected to the temperature-sensitive conductive rod via a hinge assembly.

[0016] Furthermore, the pulling assembly includes a floating ring fixedly sleeved on the upper end of the temperature-sensitive conductive rod, a sliding cavity is opened inside the rotating seat for the floating ring to pass freely, a tension spring is arranged in the sliding cavity, and both ends of the tension spring are respectively fixed to the floating ring and the inner bottom wall of the sliding cavity.

[0017] Furthermore, a ball is rotatably embedded in the top of the swing arm, and the ball is used in conjunction with the frustum.

[0018] Furthermore, the hinge assembly includes a sliding pin fixed to the upper end of the temperature-sensitive conductive rod, and the outer wall of the floating frame is provided with a waist-shaped hole for the sliding pin to be inserted into, and the sliding pin slides freely in the waist-shaped hole.

[0019] The beneficial effects of the present invention are as follows: In the present invention, a temperature-sensitive conductive rod is arranged to extend to various positions inside the external reactor, and a rotating seat is driven to rotate by a rotating unit, so that the temperature-sensitive conductive rod is alternately electrically connected to the temperature sensing element, thereby realizing temperature detection at different positions inside the external reactor; In the present invention, the driven gear is driven to mesh and rotate, thereby driving the rotating seat to rotate. When the rotating seat rotates, the temperature-sensitive conductive rod is alternately rotated to the driving gear, and the ball on the top of the swing arm is in contact with the frustum, and then the frustum drives the swing arm to swing downward, so that the swing arm drives the floating frame to swing upward, and then the sliding pin slides in the waist-shaped hole, and drives the temperature-sensitive conductive rod to move upward, so that the end of the temperature-sensitive conductive rod is in contact with the conductive plate, and then the temperature-sensitive conductive rod is electrically connected to the conductive plate, thereby realizing electrical connection between the temperature-sensing element and the temperature-sensitive conductive rod; In the present invention, a tension spring is used to generate a tension force on the limit ring, so that in the initial state, the tension spring pulls the limit ring to move downward, and the limit ring drives the temperature-sensitive conductive rod to move downward, so that in the initial state, the temperature-sensitive conductive rod is out of contact with the temperature-sensitive element. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic diagram of the overall structure of a thermal resistor of a catalytic cracking unit in the present invention; Figure 2 yes Figure 1 A schematic diagram of the structure from a front view angle; Figure 3 yes Figure 1 A schematic cross-sectional view of a part of the structure; Figure 4 yes Figure 1 Schematic diagram of the structure at an upward viewing angle; Figure 5 yes Figure 4 A schematic cross-sectional view of a part of the structure; Figure 6 yes Figure 5 A magnified schematic diagram of the local structure at point A.

[0021] Reference numerals: 1. Wiring part; 2. Servo motor; 3. Ear plate; 4. Connecting sleeve; 5. Driving gear; 6. Swing arm; 7. Temperature-sensitive conductive rod; 8. Rotating seat; 9. Driven gear; 10. End cover seat; 11. Cone; 12. Connecting seat; 13. Temperature-sensitive element; 14. Bearing; 15. Threaded part; 16. Floating ring; 17. Floating frame; 18. Sliding pin; 19. Waist-shaped hole; 20. Avoidance groove; 21. Tension spring; 22. Through groove; 23. Connecting column; 24. Ball. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See Figure 1-Figure 6 As shown; The present embodiment provides a thermal resistor for a catalytic cracking device, including a wiring portion 1 of the thermal resistor, wherein the wiring portion 1 is provided with a wiring terminal and a PCB circuit board, wherein a threaded portion 15 is coaxially provided at the lower end of the wiring portion 1, wherein an end cap seat 10 is threadedly sleeved on the threaded portion 15, wherein the end cap seat 10 is provided with an internal threaded hole for threading the threaded portion 15, and furthermore, the end cap seat 10 is installed on the outer shell surface of the external reactor by means of screws, wherein a connecting seat 12 is coaxially fixedly connected to the lower end face of the end cap seat 10, wherein a bearing mounting groove is provided at the periphery of the connecting seat 12, wherein a bearing 14 is installed in the bearing mounting groove, wherein a rotating seat 8 is sleeved on the outer ring of the bearing 14, and wherein three sensing elements are provided on the end face of the rotating seat 8. A temperature-sensing conductive rod 7 is provided, and a cylindrical temperature-sensing element 13 is inserted into the connecting seat 12. The temperature-sensing element 13 is electrically connected to the terminal block through a cable, and the terminal block is electrically connected to the PCB circuit board. A conductive plate is welded to one end of the temperature-sensing element 13 passing through the lower end surface of the connecting seat 12, and the conductive plate is used in conjunction with the temperature-sensing conductive rod 7. The temperature-sensing conductive rod 7 is extended to various positions inside the external reactor, and the rotating seat is driven to rotate by the rotating unit, so that the temperature-sensing conductive rod 7 is alternately electrically connected to the temperature-sensing element 13, so that the temperature-sensing conductive rod 7 and the temperature-sensing element 13 are alternately electrically connected to realize temperature detection at different positions inside the external reactor.

[0024] Three ear plates 3 are welded on the periphery of the end cover seat 10, and the three ear plates 3 correspond to three temperature-sensitive conductive rods 7 respectively. The temperature-sensitive conductive rods 7 extend to the inside of the external reactor. A servo motor 2 is vertically installed on the ear plate 3, and the output shaft of the servo motor 2 is drivingly connected with a connecting sleeve 4. The lower end of the connecting sleeve 4 is coaxially fixedly sleeved with a driving gear 5, and the periphery of the rotating seat 8 is fixedly sleeved with a driven gear 9, and the driving gear 5 and the driven gear 9 are meshed for transmission; an ear block is welded on the periphery of the rotating seat 8, and a swing arm 6 is hinged on the ear block. The swing arm 6 is provided with a through groove 22 for the ear block to pass freely, and a floating frame 17 is fixedly connected to the lower end of the swing arm 6. The floating frame 17 is provided with an air avoidance groove 20 for the temperature-sensitive conductive rod 7 to pass freely, and a frustum is fixedly connected to the lower end surface of the driving gear 5 11, the outer diameter of the cone 11 decreases from top to bottom, and the upper end of the swing arm 6 cooperates with the cone 11; the driven gear 9 is driven to mesh and rotate through the active gear 5, thereby driving the rotating seat 8 to rotate. When the rotating seat 8 rotates, the temperature-sensitive conductive rod 7 will rotate alternately to the active gear 5, and the ball at the top of the swing arm 6 will contact the cone 11, and then the cone 11 will drive the swing arm 6 to swing downward, so that the swing arm 6 drives the floating frame 17 to swing upward, and then the sliding pin slides in the waist-shaped hole, and drives the temperature-sensitive conductive rod 7 to move upward, so that the end of the temperature-sensitive conductive rod 7 contacts the conductive plate, and then the temperature-sensitive conductive rod 7 is electrically connected to the conductive plate, so that the temperature-sensitive element 13 is electrically connected to the temperature-sensitive conductive rod 7.

[0025] The upper end of the temperature-sensitive conductive rod 7 is fixedly sleeved with a floating ring 16, and a sliding cavity is provided inside the rotating seat 8 for the floating ring 16 to pass freely. A tension spring 21 is provided in the sliding cavity, and the two ends of the tension spring 21 are respectively fixedly connected to the floating ring 16 and the inner bottom wall of the sliding cavity. The top of the swing arm 6 is integrally fixedly connected with a connecting column 23, and a ball 24 is rotatably embedded on the top of the connecting column 23. The ball 24 is used in conjunction with the frustum 11. The upper end of the temperature-sensitive conductive rod 7 is fixedly connected with a sliding pin 18, and the outer wall of the floating frame 17 is provided with a waist-shaped hole 19 for the sliding pin 18 to be inserted. The sliding pin 18 slides freely in the waist-shaped hole 19, and the length direction of the waist-shaped hole 19 is parallel to the length direction of the floating frame 17. The tension spring 21 generates a pulling force on the limit ring, so that in the initial state, the tension spring 21 will pull the limit ring to move downward, and the limit ring drives the temperature-sensitive conductive rod to move downward, so that in the initial state, the temperature-sensitive conductive rod 7 is out of contact with the temperature-sensitive element 13.

[0026] The working principle of this embodiment is as follows: the servo motor 2 is started, and its output shaft rotates, and drives the driving gear 5 to rotate. The driving gear 5 meshes with the driven gear 9 and rotates, thereby driving the rotating seat 8 to rotate. When the rotating seat 8 rotates, the three temperature-sensitive conductive rods 7 rotate alternately to the driving gear 5, thereby making the ball 24 contact with the lower end surface of the cone 11, and the cone 11 generates a downward thrust on the ball 24, thereby making the swing arm 6 swing downward, and then the swing arm 6 drives the floating frame 17 to move upward, that is, the sliding pin 18 slides in the waist-shaped hole 19, and can drive the floating frame 17 to move upward, so that the temperature-sensitive conductive rod 7 moves upward, so that the tension spring 21 is in an elongated state and accumulates elastic potential energy, and at the same time, the end of the temperature-sensitive conductive rod 7 is in contact with the conductive plate, so that the temperature-sensitive conductive rod 7 is electrically connected to the conductive plate and the temperature-sensing element 13, so that the temperature-sensitive conductive rod 7 can detect the temperature of various places inside the reactor based on the existing technology.

[0027] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0028] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A thermal resistor for a catalytic cracking unit, comprising a connection portion (1) of the thermal resistor, characterized in that: Also includes: An end cover seat (10) detachably connected to the lower end of the wiring portion (1), the lower end surface of the end cover seat (10) being coaxially fixedly connected to a connecting seat (12); A temperature sensing element (13) is inserted into the connecting seat (12), wherein the lower end surface of the temperature sensing element (13) is flush with the lower end surface of the connecting seat (12); A rotating seat (8) rotatably mounted on the lower end of the connecting seat (12), wherein a plurality of temperature-sensitive conductive rods (7) are provided on the end surface of the rotating seat (8), and the temperature-sensitive conductive rods (7) are used in conjunction with the temperature-sensitive element (13); A rotating unit is provided on the end cover seat (10), and the rotating unit is used to drive the rotating seat (8) to rotate around its own axial direction.

2. The thermal resistor for catalytic cracking unit according to claim 1, characterized in that: A bearing installation groove is provided on the periphery of the connecting seat (12), a bearing (14) is installed in the bearing installation groove, and the rotating seat (8) is fixedly sleeved on the outer ring of the bearing (14).

3. The thermal resistor for catalytic cracking unit according to claim 1, characterized in that: An internal threaded hole is provided on the end surface of the end cover seat (10), and the wiring portion (1) is provided with a threaded portion (15) threadedly connected to the internal threaded hole.

4. The thermal resistor for catalytic cracking unit according to claim 1, characterized in that: The lower end of the temperature sensing element (13) is estimated to have a conductive plate, and the conductive plate is used in conjunction with the temperature sensing conductive rod (7).

5. The thermal resistor for catalytic cracking unit according to claim 1, characterized in that: The rotating unit comprises an ear plate (3) fixedly connected to the periphery of the end cover seat (10), a servo motor (2) being vertically mounted on the ear plate (3), an output shaft of the servo motor (2) being drivingly connected to a connecting sleeve (4), a driving gear (5) being coaxially fixedly sleeved on the lower end of the connecting sleeve (4), a driven gear (9) being fixedly sleeved on the periphery of the rotating seat (8), and the driving gear (5) and the driven gear (9) being meshed and transmitted.

6. The thermal resistor for catalytic cracking unit according to claim 5, characterized in that: A lifting device is provided inside the rotating seat (8), and the lifting device is used to drive one of the temperature-sensitive conductive rods (7) to move upward when the rotating seat (8) rotates, so that the conductive plate abuts against the end of the temperature-sensitive conductive rod (7) and is electrically connected.

7. The thermal resistor for catalytic cracking unit according to claim 6, characterized in that: The lifting device comprises an ear block fixed to the periphery of the rotating seat (8), a swing arm (6) is hingedly connected to the ear block, the swing arm (6) is provided with a through slot (22) for the ear block to pass freely, a floating frame (17) is fixedly connected to the lower end of the swing arm (6), the floating frame (17) is provided with a free slot (20) for the temperature-sensitive conductive rod (7) to pass freely, a cone (11) is fixedly connected to the lower end surface of the driving gear (5), the outer diameter of the cone (11) decreases from top to bottom, the upper end of the swing arm (6) cooperates with the cone (11), a pulling assembly for driving the temperature-sensitive conductive rod (7) to move downward is provided in the rotating seat (8), and the swing arm (6) and the temperature-sensitive conductive rod (7) are connected via a hinge assembly.

8. The thermal resistor for catalytic cracking unit according to claim 7, characterized in that: The pulling assembly comprises a floating ring (16) fixedly sleeved on the upper end of the temperature-sensitive conductive rod (7); a sliding cavity is provided inside the rotating seat (8) for the floating ring (16) to pass freely; a tension spring (21) is provided in the sliding cavity; two ends of the tension spring (21) are respectively fixedly connected to the floating ring (16) and the inner bottom wall of the sliding cavity.

9. The thermal resistor for catalytic cracking unit according to claim 7, characterized in that: A ball (24) is rotatably embedded at the top of the swing arm (6), and the ball (24) is used in conjunction with the frustum (11).

10. The thermal resistor for catalytic cracking unit according to claim 7, characterized in that: The hinge assembly comprises a sliding pin (18) fixed to the upper end of the temperature-sensitive conductive rod (7), and the outer wall of the floating frame (17) is provided with a waist-shaped hole (19) for the sliding pin (18) to be inserted, and the sliding pin (18) slides freely in the waist-shaped hole (19).

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