Coupling attachment for centrifugal pump disc pump

Abstract

The utility model relates to the field of centrifugal pumps, in particular to a coupling additional device for a centrifugal pump disc pump. The additional device comprises a fixed disc which is suitable for being fixedly connected with the coupler, and gear teeth are arranged on the outer ring of the fixed disc; an accommodating cavity for accommodating the fixed disc is formed in the rotating part; a pawl which can extend into the accommodating cavity and is propped against the gear teeth is telescopically arranged on the rotating piece; the telescopic direction of the pawl deviates from the center of the fixed disc and is configured to be derailed from the fixed disc when the rotating piece rotates in the first direction and drive the fixed disc to rotate when the rotating piece rotates in the second direction opposite to the first direction. According to the coupling additional device for the centrifugal pump disc pump, when the coupling additional device rotates in the second direction, the fixed disc and the rotating piece are clamped, so that the centrifugal pump can be subjected to pump disc; when rotating in the first direction, the fixed disc and the rotating piece are derailed, reciprocating motion of the handle is achieved, and therefore the disc pump efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of centrifugal pumps, in particular to a coupling attachment device for a centrifugal disc pump. Background Art

[0002] In the use scenario of centrifugal pumps, centrifugal pumps will certainly not run all the time. During the period when the centrifugal pump stops running, due to the excessive viscosity of the residual medium in the pump or foreign matter in the conveying medium remaining in the pump, the impeller and the pump casing are blocked. If the motor is started blindly without cranking the pump at the time of starting, the motor will burn out due to the excessive starting load exceeding its rated current. Therefore, the centrifugal pump must be cranked before starting, and the pump needs to be cranked regularly during the standby period to ensure smooth rotation and reduce accidents.

[0003] At present, centrifugal pumps are mainly operated by manpower. Large centrifugal pumps have huge rotational torque. In order to save manpower, many tools have been developed to facilitate pump operation. For example, the Chinese utility model patent with patent announcement number CN205173030U discloses a detachable centrifugal pump turning tool, which consists of a force rod and a pump shaft locking device. A sliding groove is opened in the middle of the force rod; the pump shaft locking device consists of an anti-skid belt and a belt lock. The belt lock is installed in the sliding groove in the middle of the force rod. The front end of the anti-skid belt is hooked on the front end of the force rod, and the other end is placed in the belt lock. However, in actual use, it was found that the installation space of the centrifugal pump and the structure of the centrifugal pump itself will cause this detachable centrifugal pump turning tool to be unable to rotate the pump shaft to a sufficient angle at one time, and it is necessary to constantly tighten and loosen the locking device, resulting in low efficiency of manual turning.

[0004] Therefore, this field needs a new technical solution to solve the above problems. Summary of the invention

[0005] In order to improve or solve the technical problem in the prior art that the disc pump tool needs to be constantly tightened and the disc pump tool leads to low efficiency of the manual disc pump, the utility model provides a coupling attachment device for a centrifugal disc pump. The attachment device includes a fixed disc, which is suitable for forming a fixed connection with the coupling and is provided with gear teeth on the outer ring of the fixed disc; a rotating member, which is formed with a receiving cavity for accommodating the fixed disc; a pawl which can be extended into the receiving cavity and abutted against the gear teeth is arranged on the rotating member in a telescopic manner; the telescopic direction of the pawl deviates from the center of the fixed disc and is configured to derail from the fixed disc when the rotating member rotates in a first direction, and drive the fixed disc to rotate when the rotating member rotates in a second direction opposite to the first direction.

[0006] In the coupling attachment device for the centrifugal pump disc pump of the utility model, a fixed disc and a rotating part are included. The fixed disc is fixedly connected with the coupling and rotates synchronously with the coupling. The rotating part can be driven by an external force to rotate. A pawl is arranged on the rotating part, and the pawl matches the gear teeth and the extension and contraction direction of the pawl deviates from the center of the fixed disc, so that when the rotating part rotates in the first direction, the force direction of the gear teeth on the pawl is perpendicular to the end face of the pawl, the pawl retracts into the rotating part, the tooth peaks of the gear teeth pass through the end face of the pawl, the fixed disc and the rotating part are derailed, the rotating disc rotates and the fixed disc does not move; when the rotating part rotates in the second direction, the force direction of the gear teeth is perpendicular to the side of the pawl and the extension and contraction direction of the pawl, the pawl cannot be pressed back into the rotating part, the fixed disc and the rotating part are stuck, and the manual force can drive the rotating disc and the fixed disc to rotate, thereby performing the disc pump. Through the above-mentioned arrangement, the coupling attachment device for the centrifugal pump disc pump of the utility model can, when rotating in the second direction, lock the fixed disc and the rotating part so as to disc pump the centrifugal pump; when rotating in the first direction, the fixed disc and the rotating part are derailed to realize the reciprocating motion of the handle, thereby improving the disc pump efficiency.

[0007] In the preferred technical solution of the coupling attachment device for the centrifugal disc pump, a mounting groove for accommodating the pawl is provided on the rotating member, a spring is fixed in the mounting groove, and the spring is fixedly connected to the pawl. Through the above-mentioned setting, the arrangement of the mounting groove and the spring facilitates the extension and retraction of the pawl.

[0008] In the preferred technical solution of the coupling attachment for the centrifugal pump disc pump, a plurality of ratchets are evenly arranged at intervals along the circumference of the rotating member. Through the above arrangement, the plurality of ratchets work together to improve the stability and reliability of the attachment, and avoid the entire attachment from failing to work due to damage to one ratchets.

[0009] In the preferred technical solution of the coupling attachment device for the centrifugal disc pump, a handle fixing hole for connecting the handle is arranged on the rotating member. Through the above arrangement, the handle fixing hole can be connected to the handle to facilitate the rotation of the rotating member.

[0010] In the preferred technical solution of the coupling attachment device for the centrifugal disc pump, a fixing hole matching the bolt head or nut of the coupling is provided on the fixing disc. Through the above arrangement, the fixing hole matches the bolt head or nut on the coupling to prevent the fixing disc from rotating relative to the coupling, thereby improving the connection tightness between the attachment device and the coupling and preventing slippage between the two.

[0011] In the preferred technical solution of the coupling attachment device for the centrifugal disc pump, the rotating member includes a rotating disc and an end cover fixedly connected to the rotating disc, the end cover having an inner peripheral surface; the fixed disc is connected to a fastening cover, the fastening cover having an outer peripheral surface matching the inner peripheral surface. Through the above arrangement, the inner peripheral surface of the end cover matches the outer peripheral surface of the fastening cover, the end cover can be limited, and the connection stability between the fixed disc and the rotating member is enhanced.

[0012] In the preferred technical solution of the coupling attachment device for the centrifugal disc pump, the fixed disc includes a first ring piece and a second ring piece that are detachably connected. Through the above arrangement, the detachable arrangement of the fixed disc facilitates the installation of the fixed disc on the coupling, and also facilitates the repair and replacement of the fixed disc after damage.

[0013] In the preferred technical solution of the coupling attachment device for the centrifugal disc pump, the first ring plate has the same structure as the second ring plate; a connecting plate is provided at one end of the first ring plate, and a fixing plate matching the connecting plate is provided at the other end of the second ring plate, and the connecting plate and the fixing plate are fixedly connected by bolts.

[0014] In the preferred technical solution of the coupling attachment device for the centrifugal disc pump, the fastening cover comprises a first half and a second half that are detachably connected. Through the above arrangement, the detachable arrangement of the fastening cover facilitates the installation of the fastening cover on the coupling, and also facilitates the repair and replacement of the fastening cover after it is damaged.

[0015] In the preferred technical solution of the coupling attachment device for the centrifugal disc pump, the tooth surface angle of adjacent gear teeth is 90°. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0017] Figure 1 The utility model is a schematic diagram of the overall structure of an embodiment of a coupling attachment device for a centrifugal disc pump.

[0018] Figure 2 The utility model is an exploded structural schematic diagram of an embodiment of a coupling attachment device for a centrifugal disc pump.

[0019] Figure 3 The utility model is a cross-sectional structural diagram of an embodiment of a coupling attachment device for a centrifugal disc pump.

[0020] Figure 4 It is a schematic diagram of an embodiment of the fixed disc in the coupling attachment device of the centrifugal disc pump of the utility model.

[0021] Figure 5 It is a schematic diagram of an embodiment of the utility model of a fastening cover in a coupling attachment device for a centrifugal disc pump.

[0022] Figure 6 It is a schematic diagram of an embodiment of a rotating disc in a coupling attachment device for a centrifugal disc pump of the utility model.

[0023] List of reference numerals: 1. fixed disk; 11. gear teeth; 12. fixing hole; 13. first ring plate; 14. second ring plate; 15. connecting sheet; 16. fixing sheet; 2. fastening cover; 21. outer peripheral surface; 22. first half; 23. second half; 3. rotating disk; 31. pawl; 32. mounting groove; 33. spring; 34. handle fixing hole; 4. end cover; 41. inner peripheral surface. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0025] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In order to improve or solve the technical problem in the prior art that the disc pump tool needs to be constantly tightened and the disc pump tool leads to low efficiency of the manual disc pump, the utility model provides a coupling attachment for a centrifugal disc pump. The attachment includes a fixed disc 1, which is suitable for forming a fixed connection with the coupling and is provided with gear teeth 11 on the outer ring of the fixed disc 1; a rotating member, which is formed with a receiving cavity for accommodating the fixed disc 1; a pawl 31 which can be extended into the receiving cavity and abutted against the gear teeth 11 is retractably arranged on the rotating member; the retracting direction of the pawl 31 deviates from the center of the fixed disc 1 and is configured to derail from the fixed disc 1 when the rotating member rotates in a first direction, and drive the fixed disc 1 to rotate when the rotating member rotates in a second direction opposite to the first direction.

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model of the coupling attachment device for a centrifugal disc pump; Figure 2 The exploded structural diagram of the embodiment of the utility model for the coupling attachment device of the centrifugal pump disc pump. Figure 1 and Figure 2 As shown, in one or more embodiments, the coupling attachment device for a centrifugal pump disc pump of the utility model comprises a fixed disc 1, a fastening cover 2 and a rotating member, wherein the rotating member comprises a rotating disc 3 and an end cover 4.

[0029] Figure 3 It is a cross-sectional structural schematic diagram of an embodiment of the utility model of a coupling attachment device for a centrifugal disc pump; Figure 4 The figure is a schematic diagram of an embodiment of the fixed disk in the coupling attachment device of the centrifugal pump disk pump of the utility model. Figure 2 , Figure 3 and Figure 4As shown, the fixed disk 1 is suitable for forming a fixed connection with the coupling. In one or more embodiments, the fixed disk 1 is roughly disc-shaped, and gear teeth 11 are arranged on the outer ring of the fixed disk 1. Preferably, the tooth surface angle of adjacent gear teeth 11 is 90°. In one or more embodiments, the fixed disk 1 includes a first ring sheet 13 and a second ring sheet 14 that are detachably connected. Specifically, the first ring sheet 13 and the second ring sheet 14 have the same structure, a connecting sheet 15 is arranged at one end of the first ring sheet 13, and a fixed sheet 16 matching the connecting sheet 15 is arranged at the other end of the second ring sheet 14. The thickness of the fixing sheet 16 and the connecting sheet 15 is lower than the thickness of the fixed disk 1, and the thickness of the fixing sheet 16 and the connecting sheet 15 after superposition is equal to the thickness of the fixed disk 1. The connecting sheet 15 on the first ring sheet 13 and the fixing sheet 16 on the second ring sheet 14 are fixedly connected by bolts, and the fixing sheet 16 on the first ring sheet 13 and the connecting sheet 15 on the second ring sheet 14 are fixedly connected by bolts, so that the first ring sheet 13 and the second ring sheet 14 are combined to form a fixed disk 1. Furthermore, a fixing hole 12 matching the bolt head or nut of the coupling is provided on the fixed disk 1. The fixing hole 12 is roughly hexagonal and can be completely fitted with the bolt head and nut, thereby preventing the fixed disk 1 from rotating relative to the coupling. Furthermore, a bolt hole is also provided on the fixed disk 1, and the fixed disk 1 is fixedly connected to the flange of the coupling through the bolts in the bolt hole.

[0030] Figure 5 Schematic diagram of an embodiment of the utility model for fastening cover in the coupling attachment device of a centrifugal pump disc pump. Figure 2 and Figure 5 As shown, in one or more embodiments, the fastening cover 2 is fixedly connected to the fixed disk 1 by bolts. Specifically, bolt holes are also provided on the fastening cover 2, and the bolt holes correspond to the bolt holes on the fixed disk 1, so that the bolts can fix the fastening cover 2 and the fixed disk 1 on the flange of the coupling. Further, the fastening cover 2 includes a first half 22 and a second half 23 that are detachably connected. The detachable structure of the fastening cover 2 is the same as the detachable structure of the fixed disk 1, and the connecting sheet 15 and the fixing sheet 16 are respectively arranged at both ends of the first half 22 and the second half 23, which will not be repeated here. Further, the fastening cover 2 has an outer peripheral surface 21, and the outer peripheral surface 21 is roughly L-shaped, with one side abutting against the inner wall of the end cover 4, and the other side abutting against the inner peripheral surface 41 of the end cover 4.

[0031] Figure 6 Schematic diagram of an embodiment of the utility model for a rotating disc in a coupling attachment device of a centrifugal disc pump. Figure 3 and Figure 6As shown, a receiving cavity for receiving the fixed disk 1 is formed between the rotating disk 3 and the end cover 4. The end cover 4 is fixedly connected to the rotating disk 3 by bolts. The end cover 4 has an inner circumferential surface 41, and the inner circumferential surface 41 matches the outer circumferential surface 21 of the fastening cover 2. In one or more embodiments, a mounting groove 32 is provided on the rotating disk 3, and a spring 33 and a pawl 31 are arranged in the mounting groove 32. Specifically, the extension direction of the mounting groove 32 deviates from the center of the fixed disk 1. One end of the spring 33 is fixed in the mounting groove 32, and the other end is fixedly connected with the pawl 31. The pawl 31 is roughly cylindrical and is telescopically arranged in the mounting groove 32 by the spring 33. One end of the pawl 31 extends into the mounting groove 32 and its end face abuts against the gear 11. Further, a plurality of mounting grooves 32 are evenly and spacedly arranged along the circumference of the rotating disk 3, and a corresponding pawl 31 and a spring 33 are correspondingly installed in each mounting groove 32. Preferably, two mounting grooves 32 are arranged. Furthermore, a handle fixing hole 34 for connecting a handle is arranged on the rotating member to drive the rotation of the rotating member.

[0032] See also Figure 2 and Figure 3 When installing the coupling attachment device for the centrifugal pump disc pump of the utility model, the coupling needs to be removed first, and the rotating disc 3 and the end cover 4 are placed on the rotating shaft of the machine pump, and then the coupling is reinstalled; when connecting the coupling bolts and nuts, the fixing holes 12 on the fixing disc 1 need to be aligned with the bolt heads or nuts, and then the coupling bolts are tightened, and the coupling installation is completed. Secondly, first assemble the fixing disc 1 and the fastening cover 2, and then use bolts to connect the two and fix them on the flange of the coupling.

[0033] When the rotating part rotates in the first direction, the force direction of the gear teeth 11 on the pawl 31 is perpendicular to the end face of the pawl 31, the pawl 31 retracts into the rotating part, the tooth peaks of the gear teeth 11 pass over the end face of the pawl 31, the fixed disk 1 derails from the rotating part, the rotating disk 3 rotates while the fixed disk 1 does not move; when the rotating part rotates in the second direction, the force direction of the gear teeth 11 is perpendicular to the side face of the pawl 31 and to the extension and retraction direction of the pawl 31, the pawl 31 cannot be pressed back into the rotating part, the fixed disk 1 and the rotating part are stuck, and artificial force can drive the rotating disk 3 and the fixed disk 1 to rotate, thereby performing a disk pump. Figure 3 In the orientation shown, the first direction is counterclockwise and the second direction is clockwise.

[0034] So far, the technical scheme of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical schemes after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A coupling attachment for a centrifugal disc pump, characterized in that: include: A fixed plate (1) adapted to form a fixed connection with the coupling and having gear teeth (11) arranged on the outer ring of the fixed plate (1); A rotating member is formed with an accommodating cavity for accommodating the fixed disk (1); a pawl (31) is retractably arranged on the rotating member and can be extended into the accommodating cavity and abutted against the gear teeth (11); the retracting direction of the pawl (31) deviates from the center of the fixed disk (1) and is configured to derail from the fixed disk (1) when the rotating member rotates in a first direction, and drive the fixed disk (1) to rotate when the rotating member rotates in a second direction opposite to the first direction.

2. The coupling attachment for a centrifugal disc pump according to claim 1, characterized in that: The rotating member is provided with a mounting groove (32) for accommodating the ratchet (31), a spring (33) is fixed in the mounting groove (32), and the spring (33) is fixedly connected to the ratchet (31).

3. The coupling attachment for a centrifugal disc pump according to claim 1, characterized in that: A plurality of ratchet claws (31) are evenly arranged at intervals along the circumference of the rotating member.

4. The coupling attachment for a centrifugal disc pump according to claim 1, characterized in that: A handle fixing hole (34) for connecting a handle is arranged on the rotating member.

5. The coupling attachment for a centrifugal disc pump according to claim 1, characterized in that: The fixing plate (1) is provided with a fixing hole (12) matching with a bolt head or a nut of the coupling.

6. The coupling attachment for a centrifugal disc pump according to claim 1, characterized in that: The rotating member comprises a rotating disk (3) and an end cover (4) fixedly connected to the rotating disk (3), wherein the end cover (4) has an inner peripheral surface (41); the fixed disk (1) is connected to a fastening cover (2), and the fastening cover (2) has an outer peripheral surface (21) matching the inner peripheral surface (41).

7. The coupling attachment for a centrifugal disc pump according to claim 6, characterized in that: The fixed disk (1) comprises a first ring piece (13) and a second ring piece (14) which are detachably connected.

8. The coupling attachment for a centrifugal disc pump according to claim 7, characterized in that: The first ring piece (13) and the second ring piece (14) have the same structure; a connecting sheet (15) is provided at one end of the first ring piece (13), and a fixing sheet (16) matching the connecting sheet (15) is provided at the other end of the second ring piece (14); the connecting sheet (15) and the fixing sheet (16) are fixedly connected by bolts.

9. The coupling attachment for a centrifugal disc pump according to claim 8, characterized in that: The fastening cover (2) comprises a first half (22) and a second half (23) which are detachably connected.

10. The coupling attachment for a centrifugal disc pump according to claim 1, characterized in that: The tooth surface angle of adjacent gear teeth (11) is 90°.

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