Filtering device for coal bed gas exploitation

Abstract

The invention discloses a filtering device for coal bed gas exploitation. The filtering device for coal bed gas exploitation comprises a filtering bin, a linkage structure, a filtering assembly, an anti-blocking assembly and a conduction structure, and the conduction structure is fixedly arranged in an inner cavity of the filtering bin; in order to solve the problem that in the prior art, when common filtering equipment conducts filtering treatment on coal bed gas, after long-time filtering, impurities and foreign matter can be accumulated at the position of a filter screen, and consequently blockage is caused, the anti-blockage assembly is designed, and by means of the arrangement of the anti-blockage assembly, in the coal bed gas filtering process, the blockage of the filter screen can be avoided. According to the invention, the filter screen is designed to filter foreign matters, the filtered foreign matters are automatically cleaned, blockage caused by accumulation is avoided, further, a conducting structure is designed, and through the arrangement of the conducting structure, the filter screen can be automatically conducted in the filtering process, so that the problem that the filtering efficiency is reduced due to the fact that the foreign matters are blocked at the positions of the filtering holes is further avoided; the automatic switch-on function is realized, and the device is suitable for popularization and application.

Description

Technical Field

[0001] The present application relates to the technical field of coalbed methane mining filters, in particular to a filtering device for coalbed methane mining. Background Art

[0002] Coalbed methane filtration is an important part of the coalbed methane mining and processing process. It involves the removal of impurities in coalbed methane to ensure the quality and safety of coalbed methane. Impurities in coalbed methane will cause wear and corrosion to mining equipment and reduce the life of equipment. Filtered coalbed methane can reduce damage to equipment and extend the service life of equipment. When initially filtering coalbed methane, corresponding filtering equipment is needed to filter large particles in coalbed methane.

[0003] The existing patent document "CN117085449A A coalbed methane gathering and transportation dust filtering device" discloses a filtering device. Although the filtering device in the above technical solution can filter the coalbed methane, large particles of dust will accumulate at the position of the filter net during the long-term filtering process, which is easy to cause the filter holes to be blocked, thereby reducing the filtering efficiency.

[0004] That is, the prior art has the following technical problems: the common filtering device is prone to clogging the filter holes during the long-term filtering process. Therefore, in view of the above problem, a filtering device is proposed for coalbed methane mining. Summary of the invention

[0005] In this embodiment, a filtering device for coalbed methane mining is provided to solve the problem that filter holes are easily clogged during long-term filtering in ordinary filtering devices in the prior art.

[0006] According to one aspect of the present application, a filtering device for coalbed methane exploitation is provided, and the filtering device for coalbed methane exploitation comprises:

[0007] A filter chamber, wherein an air intake pipe is fixedly connected to the upper end of the filter chamber, and a wind wheel assembly is fixedly connected to the air intake pipe;

[0008] A linkage structure, wherein the linkage structure is fixedly arranged between the wind wheel assembly and the filter chamber;

[0009] A filter assembly, which is fixedly arranged in the inner cavity of the filter bin and is used to filter the mined coalbed methane;

[0010] An anti-clogging component, which is fixedly arranged in the inner cavity of the filter bin, is connected to the linkage structure, and is used to automatically scrape and clean the filter component;

[0011] The conducting structure is fixedly arranged in the inner cavity of the filter chamber, the conducting structure is connected to the linkage structure, and the conducting structure is used to conduct and clear the filter component.

[0012] Furthermore, the wind wheel assembly includes a circular fixed shell, a rotating roller and a wind wheel. The circular fixed shell is fixedly arranged at the air intake duct and is communicated with the air intake duct. A rotating roller is rotatably connected in the inner cavity of the circular fixed shell. A plurality of wind wheels are fixedly connected to the arc-shaped wall of the rotating roller. The plurality of wind wheels are fixedly arranged in a ring shape on the arc-shaped wall of the rotating roller.

[0013] Furthermore, the linkage structure includes a rotating disk A, a rotating disk B, a connecting belt A, a rotating disk C, a rotating disk D and a connecting belt B. The rotating disk A is arranged at the side wall of the circular fixed shell and is rotationally connected to the circular fixed shell. The rotating disk A is coaxially fixedly connected to the rotating roller.

[0014] Furthermore, the rotating disk B is arranged at the side wall of the filter bin and is rotatably connected to the filter bin, a connecting belt A is sleevedly connected between the rotating disk B and the rotating disk A, a rotating disk C is fixedly connected to the side wall of the rotating disk B, the rotating disk D is arranged at the side wall of the filter bin and is rotatably connected to the filter bin, and a connecting belt B is sleevedly connected between the rotating disk C and the rotating disk D.

[0015] Furthermore, the filter assembly includes a circular shell, a filter screen and a collection tank. The circular shell is fixedly arranged at the inner cavity wall of the filter bin, the filter screen is fixedly connected at the middle position of the circular shell, and the collection tank is fixedly arranged at the side position of the filter screen.

[0016] Furthermore, the anti-clogging component includes a connecting shell, a first rotating rod, a first bevel gear, a second rotating rod, a second bevel gear and an arc-shaped rubber scraper. The connecting shell is fixedly arranged at the side wall of the inner cavity of the filter bin. The first rotating rod is rotatably connected in the inner cavity of the connecting shell, and one end of the first rotating rod is coaxially fixedly connected to the rotating disk B.

[0017] Furthermore, a first bevel gear is fixedly connected to the arc-shaped wall of the first rotating rod, a second rotating rod is rotatably connected to the bottom wall of the inner cavity of the connecting shell, a second bevel gear is fixedly connected to the top end of the second rotating rod, the second bevel gear and the first bevel gear are meshed with each other, the bottom end of the second rotating rod extends to the upper position of the filter screen, and an arc-shaped rubber scraper is fixedly connected to the bottom end of the second rotating rod, and the arc-shaped rubber scraper is in contact with the filter screen.

[0018] Furthermore, the conduction structure includes a fixed bracket, a movable guide rod, an inclined slider, a rotating disc, an arc-shaped protrusion, a fixed circular plate and a conduction needle. The rotating disc is arranged in the inner cavity of the filter bin and is rotatably connected to the filter bin. The rotating disc is coaxially connected to the rotating disc D.

[0019] Furthermore, a plurality of arc-shaped protrusions are fixedly connected to the arc-shaped wall of the rotating disc, the fixed bracket is fixedly arranged at the inner cavity side wall position of the filter bin, a movable guide rod is slidably connected to the fixed bracket, a fixed circular plate is fixedly connected to the top end of the movable guide rod, a conducting needle is fixedly connected to the upper surface of the fixed circular plate, an inclined sliding block is fixedly connected to the bottom end of the movable guide rod, and the inclined sliding block contacts the arc-shaped wall of the rotating disc.

[0020] Through the above-mentioned technical scheme of the present application, in order to solve the problem in the prior art that when ordinary filtering equipment is filtering coalbed methane, after a long period of filtration, impurities and foreign matter will accumulate at the filter screen position causing clogging, the present application designs an anti-clogging component. Through the setting of the anti-clogging component, the filtered foreign matter can be automatically cleaned during the filtering process of the coalbed methane, thereby avoiding clogging caused by accumulation. Furthermore, a conducting structure is designed. Through the setting of the conducting structure, the filter screen can be automatically conducted during the filtration process, thereby further avoiding the problem of reduced filtration efficiency caused by foreign matter clogging the filter holes, realizing the function of automatic conduction, which is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present application;

[0023] Figure 2 This is a schematic structural diagram of a wind wheel assembly according to an embodiment of the present application;

[0024] Figure 3 A schematic diagram of a linkage structure of an embodiment of the present application;

[0025] Figure 4 This is a schematic diagram of the structure of a filter assembly according to an embodiment of the present application;

[0026] Figure 5 A schematic diagram of the connection of an anti-blocking component according to an embodiment of the present application;

[0027] Figure 6 For an embodiment of the present application Figure 5 A schematic diagram of the structure of the local enlargement of the A;

[0028] Figure 7 This is a schematic diagram of the interior of a connection shell according to an embodiment of the present application;

[0029] Figure 8 A connection diagram of a conductive structure according to an embodiment of the present application.

[0030] In the figure:

[0031] Filter chamber 1, air intake pipe 2;

[0032] Wind wheel assembly 3, circular fixed shell 301, rotating roller 302, wind wheel 303;

[0033] Linkage structure 4, rotating disk A401, rotating disk B402, connecting belt A403, rotating disk C404, rotating disk D405, connecting belt B406;

[0034] Filter assembly 5, circular shell 501, filter screen 502, collection tank 503;

[0035] Anti-blocking component 6, connecting shell 601, first rotating rod 602, first bevel gear 603, second rotating rod 604, second bevel gear 605, arc-shaped rubber scraper 606;

[0036] Conductive structure 7, fixed bracket 701, movable guide rod 702, inclined slider 703, rotating disc 704, arc-shaped protrusion 705, fixed circular plate 706, and conductive needle 707. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0038] 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 comprising 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.

[0039] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0040] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0041] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] See also Figure 1-8 As shown, a filtering device is used for coalbed methane exploitation, and the filtering device for coalbed methane exploitation comprises:

[0043] A filter chamber 1, an air intake pipe 2 is fixedly connected to the upper end of the filter chamber 1, and a wind wheel assembly 3 is fixedly connected to the air intake pipe 2;

[0044] A linkage structure 4, wherein the linkage structure 4 is fixedly arranged between the wind wheel assembly 3 and the filter chamber 1;

[0045] A filter assembly 5, wherein the filter assembly 5 is fixedly disposed in the inner cavity of the filter chamber 1, and is used for filtering the mined coalbed methane;

[0046] An anti-clogging component 6, which is fixedly arranged in the inner cavity of the filter chamber 1, and is connected to the linkage structure 4, and is used for automatically scraping and cleaning the filter component 5;

[0047] The conducting structure 7 is fixedly arranged in the inner cavity of the filter chamber 1 , and is connected to the linkage structure 4 . The conducting structure 7 is used to conduct and clear the filter assembly 5 .

[0048] Through the above technical solution, by setting the anti-clogging component 6, the filtered foreign matter can be automatically cleaned during the filtration of coalbed methane, avoiding blockage caused by accumulation. Further, a conduction structure 7 is designed. By setting the conduction structure 7, the filter screen can be automatically conducted during the filtration process, thereby further avoiding the problem of reduced filtration efficiency caused by foreign matter blocking the filter hole position, realizing the function of automatic conduction, which is suitable for popularization and use.

[0049] The wind wheel assembly 3 includes a circular fixed shell 301, a rotating roller 302 and a wind wheel 303. The circular fixed shell 301 is fixedly arranged at the air intake pipe 2 and communicated with the air intake pipe 2. The rotating roller 302 is rotatably connected in the inner cavity of the circular fixed shell 301. A plurality of wind wheels 303 are fixedly connected at the arc-shaped wall of the rotating roller 302. The plurality of wind wheels 303 are fixedly arranged at the arc-shaped wall of the rotating roller 302 in an annular shape. Through the technical solution, the coalbed methane to be filtered is transported through one end of the air intake pipe 2, and the coalbed methane enters the inner cavity of the filter bin 1 through the air intake pipe 2 for filtering. At the same time, when the coalbed methane flows through the wind wheel assembly 3, the airflow can drive the wind wheel 303 to rotate, thereby driving the rotating roller 302 to rotate, so that the rotating roller 302 can realize the self-rotation function.

[0050] The linkage structure 4 includes a rotating disk A401, a rotating disk B402, a connecting belt A403, a rotating disk C404, a rotating disk D405 and a connecting belt B406. The rotating disk A401 is arranged at the side wall of the circular fixed shell 301 and is rotatably connected to the circular fixed shell 301. The rotating disk A401 is coaxially fixedly connected to the rotating roller 302. Through this technical solution, when the rotating roller 302 rotates, the rotating disk A401 can be driven to rotate;

[0051] The rotating disk B402 is arranged at the side wall of the filter bin 1 and is rotatably connected to the filter bin 1. A connecting belt A403 is sleeved and connected between the rotating disk B402 and the rotating disk A401. A rotating disk C404 is fixedly connected to the side wall of the rotating disk B402. The rotating disk D405 is arranged at the side wall of the filter bin 1 and is rotatably connected to the filter bin 1. A connecting belt B406 is sleeved and connected between the rotating disk C404 and the rotating disk D405. Through the technical solution, during the filtering process of coalbed methane, the rotating roller 302 can be automatically driven to rotate, thereby driving the rotating disk A401 to rotate, and then the rotating disk B402 and the rotating disk C404 can be driven to rotate, thereby driving the rotating disk D405 to rotate;

[0052] The filter assembly 5 includes a circular shell 501, a filter screen 502 and a collection tank 503. The circular shell 501 is fixedly arranged at the inner cavity wall position of the filter bin 1. The filter screen 502 is fixedly connected at the middle position of the circular shell 501. The collection tank 503 is fixedly arranged at the side position of the filter screen 502. Through the technical solution, the coalbed methane entering the inner cavity of the filter bin 1 can be filtered through the filter screen 502, so that large particles of impurities in the coalbed methane are filtered;

[0053] The anti-clogging component 6 includes a connecting shell 601, a first rotating rod 602, a first bevel gear 603, a second rotating rod 604, a second bevel gear 605 and an arc-shaped rubber scraper 606. The connecting shell 601 is fixedly arranged at the side wall of the inner cavity of the filter bin 1. The first rotating rod 602 is rotatably connected in the inner cavity of the connecting shell 601. One end of the first rotating rod 602 is coaxially fixedly connected to the rotating disk B402. Through the technical solution, when the rotating disk B402 rotates, the first rotating rod 602 can be driven to rotate;

[0054] The arc-shaped wall of the first rotating rod 602 is fixedly connected with the first bevel gear 603, the inner cavity bottom wall of the connecting shell 601 is rotatably connected with the second rotating rod 604, the top of the second rotating rod 604 is fixedly connected with the second bevel gear 605, the second bevel gear 605 and the first bevel gear 603 are meshed with each other, the bottom end of the second rotating rod 604 extends to the upper position of the filter screen 502, the bottom end of the second rotating rod 604 is fixedly connected with an arc-shaped rubber scraper 606, the arc-shaped rubber scraper 606 is in contact with the filter screen 502, and through the technical solution, when the first rotating rod 604 is rotated, the second bevel gear 605 is fixedly connected with the second bevel gear 605, and the second bevel gear 605 is meshed with the first bevel gear 603. When the movable rod 602 rotates, it can drive the first bevel gear 603 to rotate, and then drive the second bevel gear 605 to rotate, thereby driving the second rotating rod 604 to rotate. The rotation of the second rotating rod 604 can drive the arc-shaped rubber scraper 606 to rotate, and then the rotation of the arc-shaped rubber scraper 606 can rotate and clean the solid particle foreign matter on the surface of the filter screen 502. Through the effect of rotation, the particle foreign matter is continuously pushed and falls into the collecting tank 503, thereby avoiding the clogging phenomenon caused by the accumulation of particles generated by filtration at the filter screen 502, and realizing the automatic anti-clogging function;

[0055] The conduction structure 7 includes a fixed bracket 701, a movable guide rod 702, an inclined slider 703, a rotating disc 704, an arc-shaped protrusion 705, a fixed circular plate 706 and a conduction needle 707. The rotating disc 704 is arranged in the inner cavity of the filter bin 1 and is rotatably connected to the filter bin 1. The rotating disc 704 is coaxially connected to the rotating disc D405. Through the technical solution, when the rotating disc D405 rotates, the rotating disc 704 can be driven to rotate, so that the rotating disc 704 is automatically driven to rotate during the filtering process of coalbed methane.

[0056] The arc-shaped wall of the rotating disc 704 is fixedly connected with a plurality of arc-shaped protrusions 705; the fixed bracket 701 is fixedly arranged at the side wall of the inner cavity of the filter bin 1, and a movable guide rod 702 is slidably connected to the fixed bracket 701, and a fixed circular plate 706 is fixedly connected to the top of the movable guide rod 702, and a conducting needle 707 is fixedly connected to the upper surface of the fixed circular plate 706, and an inclined slider 703 is fixedly connected to the bottom end of the movable guide rod 702, and the inclined slider 703 contacts the arc-shaped wall of the rotating disc 704. Through the technical solution, by rotating The rotation of the disc 704 can drive the arc-shaped protrusion 705 to rotate. When the arc-shaped protrusion 705 touches the inclined sliding block 703, it can push the inclined sliding block 703 to move upward, thereby driving the movable guide rod 702 to move upward, and then driving the conducting needle 707 to move upward. The upward movement of the conducting needle 707 can conduct the filter holes at the filter net 502. The continuous rotation of the arc-shaped protrusion 705 can push the conducting needle 707 to move up and down in a cycle, thereby realizing the function of automatic and continuous conduction, and effectively avoiding the problem of reduced filtration efficiency caused by particulate matter clogging the filter holes.

[0057] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A filtering device is used for coal bed gas mining, characterized in that: The coal bed gas mining filtering device comprises: A filter chamber (1), wherein an air intake pipe (2) is fixedly connected to the upper end of the filter chamber (1), and a wind wheel assembly (3) is fixedly connected to the air intake pipe (2); A linkage structure (4), wherein the linkage structure (4) is fixedly arranged between the wind wheel assembly (3) and the filter chamber (1); A filter assembly (5), wherein the filter assembly (5) is fixedly arranged in the inner cavity of the filter chamber (1), and the filter assembly (5) is used to filter the mined coalbed methane; an anti-clogging component (6), the anti-clogging component (6) being fixedly arranged in the inner cavity of the filter chamber (1), the anti-clogging component (6) being connected to the linkage structure (4), and the anti-clogging component (6) being used for automatically scraping and cleaning the filter component (5); A conduction structure (7), wherein the conduction structure (7) is fixedly arranged in the inner cavity of the filter chamber (1), the conduction structure (7) is connected to the linkage structure (4), and the conduction structure (7) is used to conduct and clear the filter assembly (5).

2. The filtering device for coal bed gas mining according to claim 1, characterized in that: The wind wheel assembly (3) comprises a circular fixed shell (301), a rotating roller (302) and a wind wheel (303); the circular fixed shell (301) is fixedly arranged at the air intake duct (2) and is in communication with the air intake duct (2); a rotating roller (302) is rotatably connected in the inner cavity of the circular fixed shell (301); a plurality of wind wheels (303) are fixedly connected at the arc-shaped wall of the rotating roller (302); and the plurality of wind wheels (303) are fixedly arranged at the arc-shaped wall of the rotating roller (302) in a ring shape.

3. The filtering device for coal bed gas mining according to claim 1, characterized in that: The linkage structure (4) comprises a rotating disk A (401), a rotating disk B (402), a connecting belt A (403), a rotating disk C (404), a rotating disk D (405) and a connecting belt B (406); the rotating disk A (401) is arranged on the side wall of the circular fixed shell (301) and is rotatably connected to the circular fixed shell (301); the rotating disk A (401) is coaxially fixedly connected to the rotating roller (302).

4. The filtering device for coal bed gas mining according to claim 3 is characterized in that: The rotating disk B (402) is arranged at the side wall of the filter bin (1) and is rotatably connected to the filter bin (1); a connecting belt A (403) is sleeved and connected between the rotating disk B (402) and the rotating disk A (401); a rotating disk C (404) is fixedly connected to the side wall of the rotating disk B (402); the rotating disk D (405) is arranged at the side wall of the filter bin (1) and is rotatably connected to the filter bin (1); a connecting belt B (406) is sleeved and connected between the rotating disk C (404) and the rotating disk D (405).

5. The filtering device for coal bed gas mining according to claim 1, characterized in that: The filter assembly (5) comprises a circular shell (501), a filter screen (502) and a collection tank (503); the circular shell (501) is fixedly arranged at the inner wall of the filter bin (1); the filter screen (502) is fixedly connected at the middle of the circular shell (501); and the collection tank (503) is fixedly arranged at the side of the filter screen (502).

6. The filtering device for coal bed gas mining according to claim 1, characterized in that: The anti-clogging component (6) comprises a connecting shell (601), a first rotating rod (602), a first bevel gear (603), a second rotating rod (604), a second bevel gear (605) and an arc-shaped rubber scraper (606); the connecting shell (601) is fixedly arranged at a position on a side wall of an inner cavity of the filter bin (1); the first rotating rod (602) is rotatably connected in the inner cavity of the connecting shell (601); one end of the first rotating rod (602) is coaxially fixedly connected to the rotating disk B (402).

7. The filtering device for coal bed gas mining according to claim 6, characterized in that: A first bevel gear (603) is fixedly connected to the arc-shaped wall of the first rotating rod (602); a second rotating rod (604) is rotatably connected to the bottom wall of the inner cavity of the connecting shell (601); a second bevel gear (605) is fixedly connected to the top of the second rotating rod (604); the second bevel gear (605) and the first bevel gear (603) are meshed with each other; the bottom end of the second rotating rod (604) extends to the upper position of the filter screen (502); a curved rubber scraper (606) is fixedly connected to the bottom end of the second rotating rod (604); and the curved rubber scraper (606) is in contact with the filter screen (502).

8. The filtering device for coal bed gas mining according to claim 1, characterized in that: The conduction structure (7) comprises a fixed bracket (701), a movable guide rod (702), an inclined slider (703), a rotating disc (704), an arc-shaped protrusion (705), a fixed circular plate (706) and a conduction needle (707); the rotating disc (704) is arranged in the inner cavity of the filter bin (1) and is rotatably connected to the filter bin (1); the rotating disc (704) is coaxially connected to a rotating disc D (405).

9. The filtering device for coal bed gas mining according to claim 8, characterized in that: A plurality of arc-shaped protrusions (705) are fixedly connected to the arc-shaped wall of the rotating disc (704).

10. The filtering device for coal bed gas mining according to claim 8, characterized in that: The fixed bracket (701) is fixedly arranged at the side wall of the inner cavity of the filter bin (1); a movable guide rod (702) is slidably connected to the fixed bracket (701); a fixed circular plate (706) is fixedly connected to the top of the movable guide rod (702); a conducting needle (707) is fixedly connected to the upper surface of the fixed circular plate (706); an inclined sliding block (703) is fixedly connected to the bottom end of the movable guide rod (702); and the inclined sliding block (703) contacts the arc-shaped wall of the rotating disc (704).

Images