Screw pump convenient to disassemble and assemble

Abstract

The utility model relates to the technical field of screw pumps, in particular to a screw pump convenient to disassemble and assemble, which comprises a screw pump body, a stator arranged on one side of the screw pump body and an input shaft arranged in an inner cavity of the screw pump body, one side of the input shaft is fixedly connected with a rotor fork seat, a rotor is arranged in the rotor fork seat, and a rotor clamping ring is arranged on the rotor. A limiting assembly used for fixing the rotor is arranged between the rotor clamping ring and the rotor fork seat and comprises a bolt arranged in the rotor fork seat, a clamping plate and a pressing rod are arranged in the bolt, and a hydraulic set is arranged between the clamping plate and the pressing rod. By arranging the limiting assembly, the pressing rod in the bolt can be pushed to enable hydraulic oil in the first push rod to push the second push rod, so that the second push rod pushes the clamping plate to move out of the clamping groove, the bolt can be conveniently and rapidly taken down, limiting and fixing of the bolt to the rotor are omitted, and the rotor can be conveniently detached for maintenance and replacement.

Description

Technical Field

[0001] The utility model relates to the technical field of screw pumps, in particular to a screw pump which is convenient to assemble and disassemble. Background Art

[0002] A screw pump is a positive displacement rotor pump that draws and discharges liquids through the volumetric changes of a sealed chamber formed by the screw and bushing. Screw pumps are categorized by the number of screws: single, twin, triple, or quintuple. Screw pumps are characterized by steady flow, minimal pressure pulsation, self-priming capability, low noise, high efficiency, long life, and reliable operation. Their most notable advantage is that they convey fluids without eddy currents and are insensitive to the viscosity of the medium, allowing them to transport high-viscosity media.

[0003] The rotors in most existing screw pumps are connected by threads and fixedly connected to the shaft seat by a number of screws. When the rotor is disassembled and replaced, it is necessary to use tools to remove the screws. The process of removing the rotor and removing the screws is time-consuming and labor-intensive, and is relatively cumbersome, making it inconvenient to quickly remove the rotor.

[0004] Therefore, a screw pump that is easy to disassemble and assemble is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a screw pump that is easy to disassemble and assemble, so as to solve the problem proposed in the above background technology that the rotors in most existing screw pumps are connected by threads and fixedly connected to the shaft seat by a plurality of screws. When the rotor is disassembled and replaced in the threaded connection mode, it is necessary to use tools to unscrew and remove the screws. The process of unscrewing the screws to disassemble the rotor is time-consuming and labor-intensive, and is relatively cumbersome, making it inconvenient to quickly remove the rotor.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a screw pump that is easy to disassemble and assemble, comprising a screw pump body, a stator arranged on one side of the screw pump body, and an input shaft arranged in the inner cavity of the screw pump body, one side of the input shaft is fixedly connected to a rotor fork seat, a rotor is arranged in the rotor fork seat, a rotor clamping ring is provided on the rotor, a limiting assembly for fixing the rotor is provided between the rotor clamping ring and the rotor fork seat, the limiting assembly comprises a bolt arranged in the rotor fork seat, a clamping plate and a pressure rod are provided in the bolt, and a hydraulic group is provided between the clamping plate and the pressure rod.

[0007] Preferably, a groove is provided on the rotor, a matching rotor pressing block is clamped in the groove, and a rotor clamping ring is tightly attached to the rotor pressing block.

[0008] Preferably, the rotor clamping ring is a combination of two semicircles, an accommodating groove is provided in the rotor clamping ring, a connecting rod is fixedly connected to the rotor clamping ring, and the connecting rod is slidably connected to the accommodating groove.

[0009] Preferably, a through hole adapted to fit the bolt is provided on the rotor retaining ring, a guide groove is provided on the through hole, and an arc strip adapted to fit the guide groove is provided on the bolt.

[0010] Preferably, a socket is provided in the rotor fork seat, and the bolt is inserted into the socket; a slot is provided in the socket, and the clamping plate is clamped in the slot.

[0011] Preferably, the hydraulic group includes a first push rod, a second push rod and a connecting pipe, the first push rod is fixedly connected to the bottom end of the pressure rod, the second push rod is fixedly connected between the bolt and the clamping plate, and the connecting pipe is fixedly connected between the first push rod and the second push rod.

[0012] Preferably, a supporting plate is fixedly installed in the bolt, and the first push rod is fixedly connected to the supporting plate.

[0013] Preferably, a spring is fixedly connected between the pressure rod and the supporting plate, and a tension spring is fixedly connected between the bolt and the clamping plate.

[0014] Beneficial effects of the utility model:

[0015] The utility model is provided with a limit assembly to push the pressure rod in the bolt so that the hydraulic oil in the first push rod pushes the second push rod, so that the second push rod pushes the clamping plate to move out of the clamping slot, thereby facilitating the rapid removal of the bolt, canceling the limit fixation of the rotor by the bolt, and facilitating the removal of the rotor for repair and replacement. Conversely, canceling the push rod can enable the second push rod to drive the clamping plate to move and reset under the reaction force of the tension spring, so that the clamping plate is re-engaged into the clamping slot to complete the limit fixation of the bolt, and thus complete the limit fixation of the rotor;

[0016] Compared with the traditional screw thread connection fixing method, this device can quickly disassemble and install the rotor during the entire process, without the need to use tools to turn the screws for disassembly, which is simple to operate and saves time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the overall structure of a screw pump that is easy to disassemble and assemble according to an embodiment of the utility model;

[0019] Figure 2 This is a screw pump that is easy to disassemble and assemble according to the embodiment of the utility model. Figure 1 A in the middle is an enlarged structural diagram;

[0020] Figure 3 This is a schematic diagram of a bolt structure of a screw pump that is easy to disassemble and assemble according to an embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of a rotor clamping ring structure of a screw pump that is easy to disassemble and assemble according to an embodiment of the utility model;

[0022] Figure 5 This is a schematic cross-sectional view of a rotor clamping ring of a screw pump that is easy to disassemble and assemble according to an embodiment of the utility model;

[0023] Figure 6 This is a schematic diagram of the cross-sectional structure of a bolt of a screw pump that is easy to disassemble and assemble according to an embodiment of the utility model.

[0024] The markings in the figure are: 1. Screw pump body; 2. Stator; 3. Input shaft; 4. Rotor fork; 5. Rotor; 6. Rotor retaining ring; 7. Bolt; 8. Clamping plate; 9. Pressure rod; 10. Groove; 11. Rotor pressure block; 12. Receiving groove; 13. Connecting rod; 14. Through hole; 15. Guide groove; 16. Arc bar; 17. Socket; 18. Clamping slot; 19. First push rod; 20. Second push rod; 21. Connecting pipe; 22. Support plate; 23. Spring; 24. Tension spring. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0026] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the usual meanings understood by people with ordinary skills in the field to which this utility model belongs. The "first", "second" and similar words used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0027] like Figures 1 to 6As shown, a specific embodiment of the present invention provides a screw pump that is easy to disassemble and assemble, including a screw pump body 1, a stator 2 arranged on one side of the screw pump body 1, and an input shaft 3 arranged in the inner cavity of the screw pump body 1. A rotor fork seat 4 is fixedly connected to one side of the input shaft 3, a rotor 5 is provided in the rotor fork seat 4, a rotor clamping ring 6 is provided on the rotor 5, and a limiting assembly for fixing the rotor 5 is provided between the rotor clamping ring 6 and the rotor fork seat 4. By setting the limiting assembly, the rotor 5 can be quickly installed, limited and removed, thereby facilitating the maintenance and replacement of the rotor 5. The limiting assembly includes a bolt 7 arranged in the rotor fork seat 4, a clamping plate 8 and a pressure rod 9 are provided in the bolt 7, and a hydraulic group is provided between the clamping plate 8 and the pressure rod 9.

[0028] like Figures 1 to 6As shown, specifically, the hydraulic group includes a first push rod 19, a second push rod 20 and a connecting pipe 21. The first push rod 19 is fixedly connected to the bottom end of the pressure rod 9, the second push rod 20 is fixedly connected between the bolt 7 and the card plate 8, and the connecting pipe 21 is fixedly connected between the first push rod 19 and the second push rod 20. Hydraulic oil is placed in the first push rod 19 and the second push rod 20. A support plate 22 is fixedly installed in the bolt 7, and the first push rod 19 is fixedly connected to the support plate 22. A spring 23 is fixedly connected between the pressure rod 9 and the support plate 22, and a spring 23 is fixedly connected between the bolt 7 and the card plate 8. Tension spring 24, when the rotor 5 needs to be repaired or replaced, after opening the screw pump body 1 and removing the stator 2, push the pressure rod 9 so that the first push rod 19 is forced to shrink under the limiting action of the support plate 22, and the spring 23 is forced to shrink to generate a reaction force. At this time, the hydraulic oil in the first push rod 19 flows from the first push rod 19 to the second push rod 20 through the connecting pipe 21, so that the hydraulic oil pushes the second push rod 20 to extend it, and the tension spring 24 is forced to stretch to generate a reaction force. A socket 17 is provided in the rotor fork seat 4, and the bolt 7 is inserted into the socket 17. The socket 17 A card slot 18 is provided in the middle, and the card plate 8 is clamped in the card slot 18, and then the second push rod 20 pushes the card plate 8 out of the card slot 18 and into the inner cavity of the bolt 7, and then the bolt 7 can be taken out. The rotor clamping ring 6 is a combination of two semicircles, and a receiving groove 12 is provided in the rotor clamping ring 6. A connecting rod 13 is fixedly connected to the rotor clamping ring 6, and the connecting rod 13 is slidably connected to the receiving groove 12. A groove 10 is provided on the rotor 5, and a matching rotor pressure block 11 is clamped in the groove 10, and the rotor clamping ring 6 is close to the rotor pressure block 11. After taking out the bolt 7, pull the two rotors The retaining ring 6 allows the connecting rod 13 on the bottom rotor retaining ring 6 to slide in the accommodating groove 12, so that the two rotor retaining rings 6 are gradually separated. After the space between the two rotor retaining rings 6 is increased, they can be removed. Then, the rotor pressing block 11 is no longer subjected to the pressure of the rotor retaining ring 6, so that the rotor pressing block 11 can be removed from the groove 10, and then the rotor 5 can be pulled out of the socket 17 for maintenance and replacement. The entire disassembly process of removing the rotor 5 is simple to operate, and is fixed by bolts 7 instead of screws, thereby avoiding the need to use tools to turn the screws to remove the rotor.

[0029] like Figures 2 to 6As shown, specifically, a through hole 14 is provided on the rotor retaining ring 6 to match the bolt 7, a guide groove 15 is provided on the through hole 14, and an arc bar 16 is provided on the bolt 7 to match the guide groove 15. When the rotor 5 is installed in the screw pump body 1, the rotor 5 is inserted into the insertion hole 17, the rotor pressing block 11 is snapped into the groove 10, and the rotor retaining ring 6 is sleeved on the rotor 5 and close to the rotor pressing block 11, and the two rotor retaining rings 6 are pushed so that the two rotor retaining rings 6 are close to each other and close to the rotor 5, and then the bolt 7 can be inserted into it through the through hole 14 and the guide groove 15 on the rotor retaining ring 6. During the insertion of the bolt 7, the pressure is pressed. The rod 9 allows the card plate 8 to enter the inner cavity of the bolt 7 according to the principle mentioned above. After the bolt 7 is inserted into the socket 17, the pressure rod 9 can be loosened. At this time, the pressure rod 9 is reset under the reaction force of the spring 23, and the card plate 8 is again clamped into the card slot 18 under the reaction force of the tension spring 24. In the process of entering the card slot 18, the second push rod 20 is contracted, and the hydraulic oil inside it enters the first push rod 19 through the connecting pipe 21, so that the first push rod 19 is extended and cooperates with the spring 23 to reset the pressure rod 9. At this time, after the card plate 8 enters the card slot 18, the bolt 7 is limited and fixed to the rotor 5, that is, the installation of the rotor 5 is completed.

[0030] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0031] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A screw pump that is easy to disassemble and assemble, comprising a screw pump body (1), a stator (2) provided on one side of the screw pump body (1), and an input shaft (3) provided in the inner cavity of the screw pump body (1), characterized in that: A rotor fork seat (4) is fixedly connected to one side of the input shaft (3), a rotor (5) is provided in the rotor fork seat (4), a rotor clamping ring (6) is provided on the rotor (5), and a limiting assembly for fixing the rotor (5) is provided between the rotor clamping ring (6) and the rotor fork seat (4); The limiting assembly comprises a bolt (7) arranged in the rotor fork seat (4), a clamping plate (8) and a pressure rod (9) are arranged in the bolt (7), and a hydraulic group is arranged between the clamping plate (8) and the pressure rod (9).

2. A screw pump that is easy to disassemble and assemble according to claim 1, characterized in that: A groove (10) is provided on the rotor (5), a matching rotor pressing block (11) is clamped in the groove (10), and the rotor clamping ring (6) is in close contact with the rotor pressing block (11).

3. The screw pump that is easy to disassemble and assemble according to claim 1, characterized in that: The rotor clamping ring (6) is a combination of two semicircles. A receiving groove (12) is provided in the rotor clamping ring (6). A connecting rod (13) is fixedly connected to the rotor clamping ring (6), and the connecting rod (13) is slidably connected to the receiving groove (12).

4. The screw pump that is easy to disassemble and assemble according to claim 1, characterized in that: The rotor clamping ring (6) is provided with a through hole (14) adapted to the bolt (7), the through hole (14) is provided with a guide groove (15), and the bolt (7) is provided with an arc strip (16) adapted to the guide groove (15).

5. The screw pump that is easy to disassemble and assemble according to claim 1, characterized in that: A socket (17) is provided in the rotor fork seat (4), and the bolt (7) is inserted into the socket (17). A slot (18) is provided in the socket (17), and the clamping plate (8) is clamped into the slot (18).

6. The screw pump that is easy to disassemble and assemble according to claim 1, characterized in that: The hydraulic group comprises a first push rod (19), a second push rod (20) and a connecting pipe (21), wherein the first push rod (19) is fixedly connected to the bottom end of the pressure rod (9), the second push rod (20) is fixedly connected between the bolt (7) and the clamping plate (8), and the connecting pipe (21) is fixedly connected between the first push rod (19) and the second push rod (20).

7. The screw pump that is easy to disassemble and assemble according to claim 6, characterized in that: A support plate (22) is fixedly mounted in the bolt (7), and the first push rod (19) is fixedly connected to the support plate (22).

8. The screw pump that is easy to disassemble and assemble according to claim 7, characterized in that: A spring (23) is fixedly connected between the pressure rod (9) and the supporting plate (22), and a tension spring (24) is fixedly connected between the bolt (7) and the clamping plate (8).

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