Boiler flue gas desulfurization and denitrification device

Abstract

The invention discloses a boiler flue gas desulfurization and denitrification device, and relates to the technical field of boiler flue gas treatment.The boiler flue gas desulfurization and denitrification device comprises a tower body, a filler layer is fixedly installed at the top of the tower body, a tower top is fixedly installed at the top of the filler layer, a water tank is fixedly installed on the outer side of the tower body, and a circulating pump is arranged on the water tank; a spraying device is arranged on the water tank, the output end of the circulating pump is connected with the spraying device through a pipeline, a plurality of water spraying openings are formed in the tower top, and the water spraying openings are all communicated with the output end of the spraying device; wherein a stirring device for stirring the filler is arranged on the filler layer, and the flue gas is quickly dispersed, so that the primary desulfurization and denitrification effect is improved, activated carbon particles are continuously stirred, the particles are prevented from caking, full contact between the particles and the flue gas is guaranteed, the reaction time is prolonged, and the desulfurization and denitrification efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of boiler flue gas treatment technology, specifically to a boiler flue gas desulfurization and denitrification device. Background Technology

[0002] Boiler flue gas desulfurization and denitrification devices are environmental protection equipment used to reduce pollutant emissions from coal-fired, oil-fired, or gas-fired boilers, aiming to meet air pollutant emission standards.

[0003] Patent publication number CN220696313U relates to a boiler flue gas desulfurization and denitrification device. To address the problems of traditional boiler flue gas desulfurization and denitrification technologies, such as the large land area required for boiler buildings and high construction and maintenance costs, a new boiler flue gas desulfurization and denitrification device is provided. This device includes an electron beam generator, two water bath absorption tanks, two circulation tanks, and a mixed liquid collection tank. Two gas distribution plates are connected to the electron beam generator, and the two water bath absorption tanks are respectively connected to the two circulation tanks. The mixed liquid outlets of the two circulation tanks are connected to the mixed liquid collection tank. This patented desulfurization and denitrification device has a simple structure, low infrastructure costs, is easy to use, has lower costs, and its products are usable. It simultaneously solves the two major challenges of desulfurization and denitrification in boiler flue gas treatment. Furthermore, this device does not generate wastewater or secondary pollution during the desulfurization and denitrification process and requires no chemical consumption.

[0004] The aforementioned patent has the effect of not generating wastewater and secondary pollution during the desulfurization and denitrification process. However, when used for teaching demonstrations of limestone desulfurization and denitrification, in order to ensure teaching quality and safety, the packing material in contact with the flue gas needs to be recycled in a timely manner after the demonstration. However, the existing recycling method usually requires the gradual disassembly of the device, which is cumbersome, time-consuming and labor-intensive, which not only reduces teaching efficiency but also increases labor costs. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a boiler flue gas desulfurization and denitrification device, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a boiler flue gas desulfurization and denitrification device, comprising a tower body, a packing layer fixedly installed on the top of the tower body, a tower top fixedly installed on the top of the packing layer, a water tank fixedly installed on the outside of the tower body, a circulating pump installed on the water tank, a spraying device installed on the water tank, the output end of the circulating pump connected to the spraying device via a pipe, and a plurality of water spray nozzles provided inside the tower top, all of which are connected to the output end of the spraying device; wherein, a stirring device for agitating the packing layer is provided on the packing layer. The stirring device includes a motor and a round rod. When the motor is started, it drives the round rod to rotate, which in turn drives the stirring blades to rotate synchronously. The motor is fixedly installed on the top of the packing layer, and the output end of the motor rotates through the inner wall of the packing layer. The round rod is fixedly installed on the output end of the motor, and stirring blades are fixedly installed on the bottom of the round rod. The stirring blades are used to stir the spray liquid. A conical disk is fixedly installed on the circumference of the round rod, and the conical disk rotates through the bottom of the packing layer. The inclined surface design of the conical disk can guide the activated carbon particles to gather in all directions. A waterproof shell is provided on the outside of the motor.

[0007] According to the above technical solution, several through holes are provided on both the upper and lower surfaces of the packing layer. The several through holes are used for the gas-liquid contact reaction between flue gas and spray liquid. The limestone slurry enters the packing layer through the through holes and comes into full contact with the activated carbon particles. Some of the slurry adheres to the surface of the particles, and the remaining slurry accumulates at the bottom of the tower. The packing layer has a sliding groove on the inner wall near the conical disk.

[0008] According to the above technical solution, an annular plate is fixedly installed on the circumferential surface of the conical disk. The annular plate is rotatably connected to the packing layer through a sliding groove. The conical disk drives the annular plate to rotate synchronously. The annular plate rotates smoothly along the sliding groove. Several cylindrical rods are fixedly installed on the surface of the conical disk.

[0009] According to the above technical solution, an opening is provided on the outer side of the packing layer, an arc-shaped slide rail is fixedly installed on the outer side of the packing layer, a sealing plate is slidably installed on the inner wall of the slide rail, the sealing plate is used to block the opening, and the sealing plate is pushed inward along the arc-shaped slide rail to completely expose the opening of the packing layer, and a docking hole is provided at the bottom of the stirring blade.

[0010] According to the above technical solution, the tower body is provided with a support device for enhancing stirring stability, and the support device is provided with a separation device for improving stirring effect; the support device includes a base plate, a fixed pipe, a connecting rod, a spring, and a support rod. The base plate is fixedly installed on the bottom of the inner wall of the tower body, the fixed pipe is fixedly installed on the top of the base plate, the connecting rod is slidably installed on the inner wall of the fixed pipe, the spring is disposed between the fixed pipe and the connecting rod, the support rod is rotatably installed on the top of the connecting rod, the support rod is in contact with the inner wall of the docking hole, the compressed spring applies a continuous thrust to the support rod through the connecting rod, the circumferential surface of the support rod is provided with a friction plate, the friction plate is in contact with the inner wall of the docking hole, the friction plate on the support rod forms tight friction with the docking hole, and the circumferential surface of the fixed pipe is provided with an annular groove.

[0011] According to the above technical solution, a connecting frame is fixedly installed on the circumferential surface of the support rod, and the inner wall of the connecting frame is in contact with the surface of the stirring blade. The stirring blade drives the support rod to rotate synchronously through the connecting frame.

[0012] According to the above technical solution, the separation device includes a mounting plate, a connecting rod, and a rectangular rod. The mounting plate is rotatably mounted on the circumferential surface of the support rod. The connecting rod is fixedly inserted through the bottom of the mounting plate. The rectangular rod is fixedly mounted on the bottom of the connecting rod. The support rod drives the rectangular rod to rotate through the connecting rod.

[0013] According to the above technical solution, a rotating rod is rotatably installed at the end of the rectangular rod away from the connecting rod, and a connecting block is fixedly installed at the end of the rectangular rod close to the connecting rod. The rectangular rod drives the rotating rod and the connecting block to rotate synchronously, and the connecting block contacts the inner wall of the annular groove.

[0014] This invention provides a boiler flue gas desulfurization and denitrification device. It has the following beneficial effects: (1) In this boiler flue gas desulfurization and denitrification device, the conical disk guides the activated carbon particles to gather in all directions, which facilitates the quick recovery operation of the dust collector. The application of the sealing plate simplifies the packing replacement process, and the guiding design of the conical disk greatly shortens the cleaning time, ensuring that the desulfurization and denitrification of boiler flue gas is compact and efficient. At the same time, the cylindrical rod continuously stirs the activated carbon particles in the packing layer, which improves the initial desulfurization and denitrification effect by quickly dispersing the flue gas. It also continuously stirs the activated carbon particles to prevent particle agglomeration, ensures that they are in full contact with the flue gas, prolongs the reaction time, and improves the desulfurization and denitrification efficiency.

[0015] (2) In this boiler flue gas desulfurization and denitrification device, the support rod provides stable support for the stirring blade. Through the efficient cooperation between the friction plate and the docking hole, the support rod is ensured to always maintain a stable support state, share the workload of the stirring blade, reduce the driving burden of the motor, and at the same time, the support rod maintains the stability of the stirring blade through the connecting frame. By rotating synchronously with the stirring blade, the wear of the friction plate and the docking hole can be reduced, and the stability of the stirring blade during rotation can be improved, thereby suppressing the radial sway of the round rod.

[0016] (3) In this boiler flue gas desulfurization and denitrification device, the rectangular rod fully stirs the limestone slurry accumulated at the bottom of the tower. By stirring the limestone slurry with the rectangular rod, the slurry is kept stable, which improves the reaction rate of preliminary desulfurization and denitrification. It can also reduce the risk of scaling on the inner wall of the circulating pump and spray device, and extend the service life of key equipment. At the same time, the rotating rod and the connecting block enhance the support stability of the rectangular rod. Through the synergistic effect of the rotating rod and the connecting block, the overall stability of the rectangular rod during the stirring process is significantly improved, which can prevent the limestone slurry from stratifying and avoid uneven slurry concentration or sediment accumulation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the tower body of the present invention; Figure 3 This is a schematic diagram of the arc-shaped slide rail and sealing plate structure of the present invention; Figure 4 This is a schematic diagram of the conical disk and annular plate structure of the present invention; Figure 5 This is a schematic diagram showing the position and structure of the stirring blades and connecting frame of the present invention; Figure 6 This is a schematic diagram of the internal structure of the fixed tube of the present invention; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point A in the middle; Figure 8 For the present invention Figure 6 Enlarged structural diagram at point B.

[0018] In the diagram: 1. Tower body; 2. Packing layer; 3. Tower top; 4. Water tank; 5. Circulating pump; 6. Spraying device; 7. Agitator; 71. Motor; 72. Round rod; 73. Agitator blade; 74. Conical disc; 75. Annular plate; 76. Cylindrical rod; 77. Arc-shaped slide rail; 78. Sealing plate; 8. Support device; 81. Base plate; 82. Fixed pipe; 83. Connecting rod; 84. Spring; 85. Support rod; 86. Friction plate; 87. Connecting frame; 9. Separation device; 91. Mounting plate; 92. Connecting rod; 93. Rectangular rod; 94. Rotating rod; 95. Connecting block. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1 - Figure 4 One embodiment of the present invention is as follows: a boiler flue gas desulfurization and denitrification device, comprising a tower body 1, a packing layer 2 fixedly installed on the top of the tower body 1, a tower top 3 fixedly installed on the top of the packing layer 2, a water tank 4 fixedly installed on the outside of the tower body 1, a circulating pump 5 installed on the water tank 4, a spraying device 6 installed on the water tank 4, the output end of the circulating pump 5 connected to the spraying device 6 through a pipe, and a plurality of water spray nozzles provided inside the tower top 3, all of which are connected to the output end of the spraying device 6; wherein, a stirring device 7 for agitating the packing is provided on the packing layer 2, the stirring device 7 including... The motor 71 and the round rod 72 are fixedly installed on the top of the packing layer 2. The output end of the motor 71 rotates through the inner wall of the packing layer 2. The round rod 72 is fixedly installed on the output end of the motor 71. A stirring blade 73 is fixedly installed at the bottom of the round rod 72. The stirring blade 73 is used to stir the spray liquid. A conical disk 74 is fixedly installed on the circumference of the round rod 72. The conical disk 74 rotates through the bottom of the packing layer 2. A waterproof shell is provided on the outside of the motor 71. The guiding design of the conical disk 74 greatly shortens the cleaning time and ensures that the desulfurization and denitrification teaching process of boiler flue gas is compact and efficient.

[0021] The packing layer 2 has several through holes on both the upper and lower surfaces. These through holes are used for the gas-liquid contact reaction between the flue gas and the spray liquid. The inner wall of the packing layer 2 near the conical disk 74 has a sliding groove. By opening the through holes, the contact time between the flue gas and the activated carbon particles is extended, thereby improving the desulfurization and denitrification effect.

[0022] An annular plate 75 is fixedly installed on the circumferential surface of the conical disk 74. The annular plate 75 is rotatably connected to the packing layer 2 through a sliding groove. Several cylindrical rods 76 are fixedly installed on the surface of the conical disk 74. By continuously agitating the activated carbon particles, the particles are prevented from clumping and the particles are ensured to have full contact with the flue gas.

[0023] An opening is provided on the outer side of the packing layer 2, and an arc-shaped slide rail 77 is fixedly installed on the outer side of the packing layer 2. A sealing plate 78 is slidably installed on the inner wall of the slide rail 77. The sealing plate 78 is used to seal the opening. A docking hole is provided at the bottom of the stirring blade 73. The application of the sealing plate 78 simplifies the packing replacement process and makes it convenient for teachers to quickly complete the filling and recycling of activated carbon particles.

[0024] In this embodiment, before the teaching demonstration begins, the instructor pushes the sealing plate 78 inward along the arc-shaped slide rail 77 to fully expose the opening of the packing layer 2. Then, activated carbon particles are evenly filled into the packing layer 2 through the opening, ensuring a dense packing distribution. After filling, the sealing plate 78 is pulled back to its original position, ensuring a tight seal between the sealing plate 78 and the opening to prevent flue gas leakage. After the teaching demonstration ends, the instructor pushes the sealing plate 78 again to open the packing layer 2 and uses a vacuum cleaner to quickly collect the activated carbon particles. During this process, the inclined design of the conical disc 74... It can guide activated carbon particles to gather in all directions, facilitating quick recycling by the vacuum cleaner. The application of the sealing plate 78 simplifies the packing replacement process, and the guiding design of the conical disc 74 significantly shortens cleaning time, ensuring a compact and efficient teaching process for boiler flue gas desulfurization and denitrification. During the teaching demonstration, the motor 71 is started first, driving the round rod 72 to rotate. The round rod 72 drives the stirring blades 73 and the conical disc 74 to rotate synchronously. During this process, the conical disc 74 drives the annular plate 75 to rotate synchronously. The annular plate 75 rotates smoothly along the slide groove, lifting the conical disc... The conical disc 74 ensures stability, while simultaneously driving the cylindrical rod 76 to rotate synchronously. The cylindrical rod 76 continuously agitates the activated carbon particles in the packing layer 2, preventing particle accumulation and maintaining their fluidity. Then, the spraying device 6 is activated, spraying limestone slurry into the tower through nozzles. The limestone slurry enters the packing layer 2 through the through-holes, fully contacting the continuously agitated activated carbon particles. Some slurry adheres to the particle surface, while the remaining slurry accumulates at the bottom of the tower body 1. Finally, boiler flue gas for testing is introduced into the tower body 1. The flue gas first reacts with the limestone slurry accumulated at the bottom of the tower body 1. In the initial desulfurization and denitrification process, the rotating stirring blades 73 agitate the flue gas, ensuring its uniform diffusion and improving its contact efficiency with the slurry. The pre-treated flue gas rises through the packing layer 2, further reacting with the activated carbon particles and the limestone slurry adhering to their surface to complete deep purification. The treated flue gas is then discharged through the top of the tower 3 and enters the next process. By rapidly dispersing the flue gas, the effect of the initial desulfurization and denitrification is enhanced, and the activated carbon particles are continuously agitated to prevent clumping, ensuring full contact with the flue gas, extending the reaction time, and improving the efficiency of desulfurization and denitrification.

[0025] Please see Figure 1 - Figure 8Based on the above embodiments, in another embodiment of the present invention, the tower body 1 is provided with a support device 8 for enhancing stirring stability, and the support device 8 is provided with a separation device 9 for improving stirring effect; the support device 8 includes a base plate 81, a fixed pipe 82, a connecting rod 83, a spring 84 and a support rod 85. The base plate 81 is fixedly installed on the bottom of the inner wall of the tower body 1, the fixed pipe 82 is fixedly installed on the top of the base plate 81, the connecting rod 83 is slidably installed on the inner wall of the fixed pipe 82, the spring 84 is disposed between the fixed pipe 82 and the connecting rod 83, and the support rod 85 is rotatably installed on the top of the connecting rod 83. The support rod 85 contacts the inner wall of the docking hole, and a friction plate 86 is provided on the circumferential surface of the support rod 85. The friction plate 86 fits against the inner wall of the docking hole, and an annular groove is opened on the circumferential surface of the fixed pipe 82. Through the efficient cooperation between the friction plate 86 and the docking hole, the support rod 85 is ensured to always maintain a stable support state, sharing the workload of the stirring blade 73.

[0026] A connecting frame 87 is fixedly installed on the circumferential surface of the support rod 85. The inner wall of the connecting frame 87 is in contact with the surface of the stirring blade 73. The support rod 85 rotates synchronously with the stirring blade 73, which not only reduces the wear of the friction plate 86 and the docking hole, but also improves the stability of the stirring blade 73 during rotation.

[0027] The separation device 9 includes a mounting plate 91, a connecting rod 92, and a rectangular rod 93. The mounting plate 91 is rotatably mounted on the circumferential surface of the support rod 85. The connecting rod 92 is fixedly inserted through the bottom of the mounting plate 91. The rectangular rod 93 is fixedly mounted on the bottom of the connecting rod 92. The rectangular rod 93 agitates the limestone slurry, keeping the slurry stable, improving the reaction rate of preliminary desulfurization and denitrification, and reducing the risk of scaling on the inner walls of the circulating pump 5 and the spray device 6.

[0028] A rotating rod 94 is rotatably installed at the end of the rectangular rod 93 away from the connecting rod 92, and a connecting block 95 is fixedly installed at the end of the rectangular rod 93 close to the connecting rod 92. The connecting block 95 contacts the inner wall of the annular groove. Through the synergistic effect of the rotating rod 94 and the connecting block 95, the overall stability of the rectangular rod 93 during the stirring process is significantly improved, effectively preventing the limestone slurry from separating.

[0029] In this embodiment, the compressed spring 84 applies a continuous thrust to the support rod 85 through the connecting rod 83, so that the support rod 85 provides stable support for the stirring blade 73 through the docking hole. At the same time, the friction plate 86 on the support rod 85 forms tight friction with the docking hole, ensuring that the support rod 85 can provide stable support for the stirring blade 73. Through the efficient cooperation between the friction plate 86 and the docking hole, the support rod 85 is ensured to always maintain a stable support state, sharing the workload of the stirring blade 73 and reducing the driving burden of the motor 71. When the motor 71 drives the stirring blade 73 to rotate, the stirring blade 73 drives the support rod 85 to rotate synchronously through the connecting frame 87. The support rod 85 maintains the stability of the stirring blade 73 through the connecting frame 87, suppressing the radial sway of the stirring blade 73 during rotation, thereby ensuring that the round rod 72 remains stable during rotation and reducing its wear. By having the support rod 85 rotate synchronously with the stirring blade 73, not only can the wear of the friction plate 86 and the docking hole be reduced, but the stability of the stirring blade 73 during rotation can also be improved, thereby suppressing the radial sway of the round rod 72. When the support rod 85 rotates, it drives the rectangular rod 93 to rotate via the connecting rod 92. During the rotation, the rectangular rod 93 thoroughly stirs the limestone slurry accumulated at the bottom of the tower body 1, effectively preventing sedimentation and stratification of the limestone slurry due to settling, avoiding uneven slurry concentration caused by stratification, ensuring that the circulating pump 5 will not be blocked when pumping slurry, and ensuring the atomization effect of the spray device 6. By stirring the limestone slurry with the rectangular rod 93, the slurry is kept stable, improving the reaction rate of preliminary desulfurization and denitrification, and also reducing the risk of scaling on the inner walls of the circulating pump 5 and the spray device 6. To mitigate risks and extend the service life of critical equipment, when the rectangular rod 93 rotates, it drives the rotating rod 94 and the connecting block 95 to rotate synchronously. During this process, the rotating rod 94 rolls along the bottom plate 81, enhancing the support stability of the end of the rectangular rod 93 away from the connecting rod 92; the connecting block 95 rotates along the annular groove, enhancing the support stability of the end of the rectangular rod 93 close to the connecting rod 92. Through the synergistic effect of the rotating rod 94 and the connecting block 95, the overall stability of the rectangular rod 93 during the stirring process is significantly improved, effectively preventing limestone slurry stratification and avoiding uneven slurry concentration or sediment accumulation.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A boiler flue gas desulfurization and denitrification device, comprising a tower body (1), characterized in that, A packing layer (2) is fixedly installed on the top of the tower body (1), and a tower top (3) is fixedly installed on the top of the packing layer (2). A water tank (4) is fixedly installed on the outside of the tower body (1). A circulating pump (5) is installed on the water tank (4), and a spraying device (6) is installed on the water tank (4). The output end of the circulating pump (5) is connected to the spraying device (6) through a pipe. Several water nozzles are provided inside the tower top (3), and several water nozzles are connected to the output end of the spraying device (6). Among them, a stirring device (7) for stirring the packing is provided on the packing layer (2). The mixing device (7) includes a motor (71) and a round rod (72). The motor (71) is fixedly installed on the top of the packing layer (2). The output end of the motor (71) rotates through the inner wall of the packing layer (2). The round rod (72) is fixedly installed on the output end of the motor (71). A stirring blade (73) is fixedly installed on the bottom of the round rod (72). The stirring blade (73) is used to stir the spray liquid. A conical disk (74) is fixedly installed on the circumferential surface of the round rod (72). The conical disk (74) rotates through the bottom of the packing layer (2). A waterproof shell is provided on the outside of the motor (71).

2. The boiler flue gas desulfurization and denitrification device according to claim 1, characterized in that: The packing layer (2) has several through holes on both the upper and lower surfaces. The through holes are used for the gas-liquid contact reaction between flue gas and spray liquid. The packing layer (2) has a sliding groove on the inner wall near the conical disk (74).

3. The boiler flue gas desulfurization and denitrification device according to claim 1, characterized in that: An annular plate (75) is fixedly installed on the circumferential surface of the conical disk (74). The annular plate (75) is rotatably connected to the packing layer (2) through a sliding groove. Several cylindrical rods (76) are fixedly installed on the surface of the conical disk (74).

4. The boiler flue gas desulfurization and denitrification device according to claim 1, characterized in that: An opening is provided on the outer side of the packing layer (2), and an arc-shaped slide rail (77) is fixedly installed on the outer side of the packing layer (2). A sealing plate (78) is slidably installed on the inner wall of the slide rail (77). The sealing plate (78) is used to block the opening. A docking hole is provided at the bottom of the stirring blade (73). A support device (8) for enhancing stirring stability is provided on the tower body (1), and a separation device (9) for improving stirring effect is provided on the support device (8).

5. A boiler flue gas desulfurization and denitrification device according to claim 4, characterized in that: The support device (8) includes a base plate (81), a fixed tube (82), a connecting rod (83), a spring (84), and a support rod (85). The base plate (81) is fixedly installed on the bottom of the inner wall of the tower body (1). The fixed tube (82) is fixedly installed on the top of the base plate (81). The connecting rod (83) is slidably installed on the inner wall of the fixed tube (82). The spring (84) is located between the fixed tube (82) and the connecting rod (83). The support rod (85) is rotatably installed on the top of the connecting rod (83). The support rod (85) contacts the inner wall of the docking hole. A friction plate (86) is provided on the circumferential surface of the support rod (85). The friction plate (86) fits against the inner wall of the docking hole. An annular groove is opened on the circumferential surface of the fixed tube (82).

6. The boiler flue gas desulfurization and denitrification device according to claim 5, characterized in that: A connecting frame (87) is fixedly installed on the circumferential surface of the support rod (85), and the inner wall of the connecting frame (87) is in contact with the surface of the stirring blade (73).

7. A boiler flue gas desulfurization and denitrification device according to claim 4, characterized in that: The separation device (9) includes a mounting plate (91), a connecting rod (92) and a rectangular rod (93). The mounting plate (91) is rotatably mounted on the circumferential surface of the support rod (85). The connecting rod (92) is fixedly inserted through the bottom of the mounting plate (91). The rectangular rod (93) is fixedly mounted on the bottom of the connecting rod (92).

8. A boiler flue gas desulfurization and denitrification device according to claim 7, characterized in that: A rotating rod (94) is rotatably installed at the end of the rectangular rod (93) away from the connecting rod (92), and a connecting block (95) is fixedly installed at the end of the rectangular rod (93) near the connecting rod (92), and the connecting block (95) is in contact with the inner wall of the annular groove.

Images