Impeller casting device and casting process thereof

Abstract

The impeller casting device comprises a hoisting support, a clamping assembly is installed in the hoisting support, a connecting shaft is rotationally connected with the hoisting support, a sliding rod is connected into the connecting shaft in a sleeved mode, a protection plate is fixedly connected to the sliding rod, a right-angle plate is connected into the protection plate in a sleeved mode, and the right-angle plate is fixedly connected to the right-angle plate. And a positioning pin is arranged in the right-angle plate and is in threaded connection with the protective plate. The invention relates to the technical field of lifting appliances, through cooperative use of the connecting shafts, the sliding rods, the protective plates, the right-angle plates, the positioning pins and the like, the two protective plates and the eight right-angle plates are used for fixing impeller molds of different sizes, and the connecting shafts can rotate in the lifting support, so that the impeller molds can be driven to turn over in the lifting support; therefore, different positions of the impeller mold correspond to the heat treatment furnace, and hoisting of the impeller mold in the heat treatment process is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of slings, in particular to a casting device for an impeller and a casting process thereof. Background Art

[0002] The impeller is a key component in many industrial equipment (such as turbines, pumps, etc.), and its performance directly affects the overall operating efficiency and reliability of the equipment. The shortcomings of existing casting devices in impeller casting:

[0003] In existing casting devices, the fixation of impeller molds of different sizes often lacks universality. For example, traditional fixtures may be designed for specific sizes, and when encountering impeller molds with slightly different sizes, they cannot be effectively fixed. This requires different fixtures to be equipped for molds of different sizes, which increases production costs and management complexity.

[0004] Some fixtures cannot provide sufficient stability during the hoisting process. Due to the complex shape of the impeller mold, if it is not firmly fixed during hoisting, it is easy to shake or shift, which may cause the mold to be inaccurately positioned during the heat treatment process, thereby affecting the casting quality of the impeller. For example, in some simple clamping devices, the mold may only be fixed in a single direction, and the freedom of the mold cannot be fully restricted.

[0005] Low lifting flexibility:

[0006] Existing casting devices lack sufficient flexibility during the lifting process. When the impeller mold is sent into the heat treatment furnace, different parts of the mold need to accurately correspond to the heating area of ​​the heat treatment furnace. However, traditional lifting devices can often only perform simple vertical lifting operations, and it is difficult to achieve flexible rotation and adjustment of the mold in space. For example, in some foundries, the lifting equipment used can only lift the mold vertically and move it to a specified position. It is impossible to change the direction of the mold as needed during the lifting process, which may cause uneven heating of certain parts of the mold and affect the performance of the impeller.

[0007] The existing hoisting operation process is relatively cumbersome and requires multiple steps and collaboration to complete. For example, in the process of fixing the mold, adjusting the mold position, and sending the mold into the heat treatment furnace, different operators may be required to perform different operations respectively, and the connection between each operation is not smooth enough, resulting in a long hoisting process and reduced production efficiency.

[0008] In summary, the prior art has many deficiencies in the mold fixing and hoisting operations of the impeller casting device, and it is difficult to meet the needs of efficient and high-quality impeller casting. Therefore, it is necessary to develop a new impeller casting device and its casting process. Summary of the invention

[0009] In view of the shortcomings of the prior art, the present invention provides a casting device and a casting process for an impeller to solve the problems raised in the above background technology.

[0010] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a casting device for an impeller and a casting process thereof, comprising a hanging bracket, in which a clamping assembly is installed; the clamping assembly comprises a connecting shaft, a sliding rod, a guard plate, a right-angle plate, a locating pin, a threaded pin and a nut; the connecting shaft and the hanging bracket are rotatably connected, the connecting shaft is sleeved with a sliding rod, the sliding rod is fixedly connected with a guard plate, the guard plate is sleeved with a right-angle plate, the right-angle plate is provided with a locating pin, the locating pin and the guard plate are threadedly connected, the sliding rod is fixedly connected with a threaded pin, the threaded pin is sleeved with the connecting shaft, and the threaded pin is threadedly connected with a nut.

[0011] Preferably, a mounting frame is fixedly connected to the hanging bracket, a pulley is installed in the mounting frame, and the pulley is rotatably connected to the mounting frame via a pin shaft.

[0012] Preferably, a threaded hole is processed in the right-angle plate, and the threaded hole and the positioning pin are threadedly connected.

[0013] Preferably, a power assembly is installed on the lifting bracket; the power assembly includes a hydraulic rod, a connecting plate, a cylindrical pin, a toothed plate and a gear; the hydraulic rod is fixedly connected to the lifting bracket, the output end of the hydraulic rod is fixedly connected to the connecting plate, a cylindrical pin is sleeved in the connecting plate, the cylindrical pin and the lifting bracket are fixedly connected, the connecting plate is fixedly connected to the toothed plate, the toothed plate is meshingly connected with a gear, and the gear and the connecting shaft are fixedly connected.

[0014] Preferably, an adjustment component is fixedly connected to the guard plate; the adjustment component includes a mounting shell, a double-headed threaded rod, a sliding seat, a splint and a pin; a double-headed threaded rod is rotatably connected in the mounting shell, a sliding seat is threadedly connected to the double-headed threaded rod, the sliding seat and the mounting shell are sleeve-connected, a splint is fixedly connected to the sliding seat, the splint and the guard plate are fixedly connected, a pin is fixedly connected to the sliding seat, and the pin is sleeve-connected to the mounting shell.

[0015] Preferably, a hand wheel is fixedly connected to the double-headed threaded rod.

[0016] Preferably, a reinforcing rib is fixedly connected to the hanging bracket.

[0017] Preferably, a frame is provided on the guard plate, and an impeller mold is fixedly connected to the frame.

[0018] A method for using an impeller casting device comprises the following steps:

[0019] Step 1: When using the lifting bracket, place the impeller mold between the two guard plates, rotate the double-headed threaded rod in the mounting shell, drive the two slides to move toward each other in the mounting shell, and then the slide drives the guard plate to move through the clamping plate to clamp the two sides of the impeller mold;

[0020] Step 2: Move the right-angle plate in the guard plate and clamp it on the frame, and use the positioning pin to insert it into the corresponding threaded hole of the right-angle plate to determine the use position of the right-angle plate;

[0021] Step 3: The pulley on the top of the lifting bracket can be used to lift the entire mechanism. During the lifting process, the output end of the hydraulic rod drives the connecting plate to move. When the connecting plate moves along the outer wall of the cylindrical pin, the toothed plate moves with the connecting plate, driving the toothed plate to rotate the connecting shaft in the lifting bracket through the gear. As the connecting shaft rotates, the corresponding position of the impeller mold changes.

[0022] Compared with the prior art, the invention has the following advantages: the impeller casting device and its casting process have the following advantages over the conventional technology:

[0023] The impeller mold is placed between two guard plates by using a connecting shaft, a sliding rod, a guard plate, a right-angle plate and a positioning pin. The sliding rod is moved in the connecting shaft to drive the guard plate and the impeller mold to fit together. The right-angle plate is moved in the guard plate and clamped on the frame. The positioning pin is used to determine the use position of the right-angle plate. Two guard plates and eight right-angle plates are used to fix impeller molds of different sizes. The connecting shaft can be rotated in the lifting bracket, thereby driving the impeller mold to flip in the lifting bracket, thereby changing the different positions of the impeller mold to correspond to the heat treatment furnace, which is beneficial to the lifting of the impeller mold during the heat treatment process.

[0024] Through the coordinated use of hydraulic rods, connecting plates, cylindrical pins, toothed plates and gears, during the lifting process, the output end of the hydraulic rod drives the connecting plate to move, and the connecting plate moves along the outer wall of the cylindrical pin, and the toothed plate moves with the connecting plate, and then the toothed plate drives the connecting shaft to rotate in the lifting bracket through the gear, thereby changing the corresponding position of the impeller mold. Since the toothed plate and the gear are meshed and connected, and the hydraulic rod is used as the power source for moving the connecting plate, the connecting shaft can be prevented from rotating when the hydraulic rod stops working, which is beneficial to the fixation of the impeller mold after the position is adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention.

[0026] Figure 2 for Figure 1 Schematic diagram of the connection structure of the central lifting bracket, guard plate and mounting frame.

[0027] Figure 3 for Figure 1Schematic diagram of the connection structure of the middle guard plate, right-angle plate and locating pins.

[0028] Figure 4 for Figure 1 Schematic diagram of the connection structure of the middle gear, connecting shaft and sliding rod.

[0029] Figure 5 for Figure 1 Schematic diagram of the connection structure of the hydraulic rod, connecting plate and tooth plate.

[0030] Figure 6 for Figure 1 Schematic diagram of the connection structure of the central lifting bracket, mounting frame and pulley.

[0031] Figure 7 for Figure 1 Schematic diagram of the connection structure of the middle mounting shell and the double-ended threaded rod clamp.

[0032] Figure 8 for Figure 7 Schematic diagram of the connection structure of the double-threaded rod, slide and clamp.

[0033] In the figure: 1. lifting bracket; 2. clamping assembly; 201. connecting shaft; 202. sliding rod; 203. guard plate; 204. right angle plate; 205. positioning pin; 206. threaded pin; 207. nut; 3. mounting frame; 4. pulley; 5. pin shaft; 6. power assembly; 601. hydraulic rod; 602. connecting plate; 603. cylindrical pin; 604. tooth plate; 605. gear; 7. adjustment assembly; 701. mounting shell; 702. double-headed threaded rod; 703. sliding seat; 704. splint; 705. bayonet; 8. handwheel; 9. reinforcing rib; 10. frame; 11. impeller mold; 12. threaded hole. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The existing traditional lifting equipment can only realize the function of lifting the generator. The bottom of the generator always corresponds to the ground, and the generator cannot be turned over after lifting.

[0036] In view of this, the present invention provides a casting device for an impeller and a casting process thereof. Through the coordinated use of a connecting shaft, a sliding rod, a guard plate, a right-angle plate and a positioning pin, the impeller mold is placed between two guard plates, the sliding rod is moved in the connecting shaft to drive the guard plate and the impeller mold to fit together, the right-angle plate is moved in the guard plate and clamped on the frame, the positioning pin is used to determine the use position of the right-angle plate, and two guard plates and eight right-angle plates are used to fix impeller molds of different sizes, and the connecting shaft can be rotated in the lifting bracket, thereby driving the impeller mold to flip in the lifting bracket, thereby changing the different positions of the impeller mold to correspond to the heat treatment furnace, which is beneficial to the lifting work of the impeller mold during the heat treatment process.

[0037] Depend on Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 It can be seen that a casting device for an impeller and a casting process thereof include a hanging bracket 1, a clamping assembly 2 is installed in the hanging bracket 1, the clamping assembly 2 includes a connecting shaft 201, a sliding rod 202, a guard plate 203, a right-angle plate 204, a positioning pin 205, a threaded pin 206 and a nut 207, the connecting shaft 201 and the hanging bracket 1 are rotatably connected, the connecting shaft 201 is sleeved with a sliding rod 202, the sliding rod 202 is fixedly connected with a guard plate 203, the guard plate 203 is sleeved with a right-angle plate 204, the right-angle plate 204 is provided with a positioning pin 205, the positioning pin 205 and the guard plate 203 are threadedly connected, the sliding rod 202 is fixedly connected with a threaded pin 206, the threaded pin 206 and the connecting shaft 201 are sleeved and connected, and the threaded pin 206 is threadedly connected with a nut 207.

[0038] During the specific implementation process, it is worth pointing out that the connecting shaft 201 is in the shape of a hollow tube, and the upper and lower sides of the connecting shaft 201 are processed with sliding grooves. The connecting shaft 201 is symmetrically distributed on both sides of the lifting bracket 1 through bearings. The sliding rod 202 can move laterally in the connecting shaft 201. Four right-angle plates 204 are arranged in the guard plate 203, and strip patterns are opened in the right-angle plates 204. The outer wall of the locating pin 205 is processed with threads. The locating pin 205 is used to fix the position of the right-angle plate 204 in the guard plate 203. Through the two guard plates 203 and the right-angle plate 204 in the guard plate 203, generators of different sizes can be clamped for easy lifting.

[0039] Furthermore, a mounting frame 3 is fixedly connected to the hanging bracket 1 , a pulley 4 is installed in the mounting frame 3 , and the pulley 4 is rotatably connected to the mounting frame 3 via a pin 5 .

[0040] In the specific implementation process, it is worth pointing out that two mounting frames 3 are arranged on the top of the lifting bracket 1, and the pulley 4 rotates in the mounting frame 3 through the pin shaft 5. The arrangement of the pulley 4 facilitates the lifting of the lifting bracket 1.

[0041] Furthermore, a threaded hole 12 is processed in the right-angle plate 204 , and the threaded hole 12 and the positioning pin 205 are threadedly connected.

[0042] In the specific implementation process, it is worth pointing out that the threaded holes 12 are evenly distributed along the outer wall of the right-angle plate 204 , and the threaded holes 12 are designed to be easily connected with the positioning pins 205 for changing the position of the right-angle plate 204 in the guard plate 203 .

[0043] Specifically, the impeller mold 11 is placed between the two guard plates 203, and the slide bar 202 is moved in the connecting shaft 201. The slide bar 202 drives the guard plate 203 and the impeller mold 11 to fit together, and the nut 207 on the outer wall of the threaded pin 206 is rotated to fix the use position of the guard plate 203. Then, the right-angle plate 204 is moved in the guard plate 203, and the right-angle plate 204 is stuck on the frame 10. The positioning pin 205 is inserted into the threaded hole 12 corresponding to the right-angle plate 204 to determine the use position of the right-angle plate 204. At this time, the two guard plates 203 and eight right-angle plates 204 are used to fix the impeller mold 11, and the pulley 4 on the top of the lifting bracket 1 can be used to lift the entire mechanism.

[0044] Depend on Figure 1 , Figure 2 , Figure 4 and Figure 5 It can be seen that a power assembly 6 is installed on the lifting bracket 1, and the power assembly 6 includes a hydraulic rod 601, a connecting plate 602, a cylindrical pin 603, a tooth plate 604 and a gear 605. The hydraulic rod 601 is fixedly connected to the lifting bracket 1, and the output end of the hydraulic rod 601 is fixedly connected to the connecting plate 602. A cylindrical pin 603 is sleeved in the connecting plate 602. The cylindrical pin 603 is fixedly connected to the lifting bracket 1, and a tooth plate 604 is fixedly connected to the connecting plate 602. The gear 605 is meshingly connected to the tooth plate 604, and the gear 605 is fixedly connected to the connecting shaft 201.

[0045] In the specific implementation process, it is worth pointing out that the hydraulic rod 601 is fixed to the side wall of the lifting bracket 1, a slide groove is processed in the connecting plate 602, the cylindrical pin 603 plays a limiting role to ensure that the connecting plate 602 moves up and down, the tooth plate 604 moves with the connecting plate 602, and the gear 605 carries the connecting shaft 201 to rotate in the lifting bracket 1. The rotation of the gear 605 is used to change the position of the impeller mold 11 for easy lifting.

[0046] Specifically, during the lifting process, the hydraulic rod 601 is started, and the output end of the hydraulic rod 601 drives the connecting plate 602 to move, and the connecting plate 602 moves along the outer wall of the cylindrical pin 603. At the same time, the tooth plate 604 moves with the connecting plate 602, and then the tooth plate 604 drives the connecting shaft 201 to rotate in the lifting bracket 1 through the gear 605, thereby changing the corresponding position of the impeller mold 11.

[0047] Depend on Figure 1 , Figure 7 and Figure 8 It can be known that the guard plate 203 is fixedly connected with the adjustment component 7, and the adjustment component 7 includes a mounting shell 701, a double-headed threaded rod 702, a slide 703, a clamp 704 and a pin 705. The double-headed threaded rod 702 is rotatably connected in the mounting shell 701, the double-headed threaded rod 702 is threadedly connected with the slide 703, the slide 703 and the mounting shell 701 are sleeved together, the slide 703 is fixedly connected with the clamp 704, the clamp 704 and the guard plate 203 are fixedly connected, the slide 703 is fixedly connected with the pin 705, and the pin 705 and the mounting shell 701 are sleeved together.

[0048] In the specific implementation process, it is worth pointing out that a cavity is processed in the mounting shell 701, the double-headed threaded rod 702 rotates in the mounting shell 701 through a bearing, the two slides 703 move towards each other, the clamp 704 connects the guard plate 203 and the slide 703, and the design of the pin 705 ensures the horizontal movement of the slide 703. The design of the double-headed threaded rod 702 makes it easy to drive the guard plate 203 to move through the two clamps 704, thereby realizing the clamping of the impeller mold 11.

[0049] Furthermore, a hand wheel 8 is fixedly connected to the double-headed threaded rod 702 .

[0050] In the specific implementation process, it is worth pointing out that the outer wall of the hand wheel 8 is processed with grinding grooves, and the use of the hand wheel 8 is convenient for rotating the double-headed threaded rod 702 in the mounting shell 701.

[0051] Furthermore, a reinforcing rib 9 is fixedly connected to the hanging bracket 1 .

[0052] In the specific implementation process, it is worth pointing out that two reinforcing ribs 9 are provided, and the reinforcing ribs 9 increase the strength of the lifting bracket 1 .

[0053] Furthermore, a frame 10 is provided on the guard plate 203 , and an impeller mold 11 is fixedly connected to the frame 10 .

[0054] In the specific implementation process, it is worth pointing out that the frame 10 is located between the two guard plates 203 , and the frame 10 reinforces the impeller mold 11 .

[0055] Specifically, the impeller mold 11 with the frame 10 is placed between the two guard plates 203, and then the hand wheel 8 is used to rotate the double-headed threaded rod 702 in the mounting shell 701, so that the two slides 703 on the outer wall of the double-headed threaded rod 702 move toward each other in the mounting shell 701, and the slide 703 drives the guard plate 203 to move through the clamping plate 704 to clamp the impeller mold 11.

[0056] The following is combined with Figure 1-Figure 8 Describe the overall workflow of the organization:

[0057] When using the hanging bracket 1, the impeller mold 11 is placed between the two guard plates 203, and the double-headed threaded rod 702 in the mounting shell 701 is rotated to drive the two slides 703 to move toward each other in the mounting shell 701, and then the slide 703 drives the guard plate 203 to move through the clamping plate 704 to achieve the clamping of the two sides of the impeller mold 11, and the right-angle plate 204 is moved in the guard plate 203 to be stuck on the frame 10, and the positioning pin 205 is inserted into the threaded hole 12 corresponding to the right-angle plate 204 to determine the use position of the right-angle plate 204, and the hanging bracket 10 is used to fix the impeller mold 11. The pulley 4 on the top of the mounting bracket 1 can lift the entire mechanism. During the lifting process, the output end of the hydraulic rod 601 drives the connecting plate 602 to move. When the connecting plate 602 moves along the outer wall of the cylindrical pin 603, the tooth plate 604 moves with the connecting plate 602, driving the tooth plate 604 to drive the connecting shaft 201 to rotate in the lifting bracket 1 through the gear 605. As the connecting shaft 201 rotates, the corresponding position of the impeller mold 11 is changed, which is convenient for the staff to lift the impeller mold 11, thereby facilitating the lifting of the impeller mold.

[0058] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0059] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A casting device for an impeller, comprising a hanging bracket (1), characterized in that: A clamping assembly (2) is installed in the hanging bracket (1); The clamping assembly (2) comprises a connecting shaft (201), a sliding rod (202), a guard plate (203), a right-angle plate (204), a positioning pin (205), a threaded pin (206) and a nut (207); The connecting shaft (201) and the hanging bracket (1) are rotatably connected, a sliding rod (202) is sleeved in the connecting shaft (201), a guard plate (203) is fixedly connected to the sliding rod (202), a right-angle plate (204) is sleeved in the guard plate (203), a positioning pin (205) is provided in the right-angle plate (204), the positioning pin (205) and the guard plate (203) are threadedly connected, a threaded pin (206) is fixedly connected to the sliding rod (202), the threaded pin (206) and the connecting shaft (201) are sleeved and connected, and a nut (207) is threadedly connected to the threaded pin (206).

2. The impeller casting device according to claim 1, characterized in that: The hanging bracket (1) is fixedly connected to a mounting frame (3), a pulley (4) is installed in the mounting frame (3), and the pulley (4) is rotatably connected to the mounting frame (3) via a pin shaft (5).

3. The impeller casting device according to claim 2, characterized in that: A threaded hole (12) is processed in the right-angle plate (204), and the threaded hole (12) and the positioning pin (205) are threadedly connected.

4. The impeller casting device according to claim 3, characterized in that: A power assembly (6) is installed on the hanging bracket (1); The power assembly (6) comprises a hydraulic rod (601), a connecting plate (602), a cylindrical pin (603), a toothed plate (604) and a gear (605); The hydraulic rod (601) is fixedly connected to the lifting bracket (1); the output end of the hydraulic rod (601) is fixedly connected to a connecting plate (602); a cylindrical pin (603) is sleeved in the connecting plate (602); the cylindrical pin (603) is fixedly connected to the lifting bracket (1); a toothed plate (604) is fixedly connected to the connecting plate (602); a gear (605) is meshedly connected to the geared plate (604); and the gear (605) is fixedly connected to the connecting shaft (201).

5. The impeller casting device according to claim 4, characterized in that: The guard plate (203) is fixedly connected with an adjustment component (7); The adjustment assembly (7) comprises a mounting shell (701), a double-ended threaded rod (702), a sliding seat (703), a clamping plate (704) and a bayonet (705); A double-headed threaded rod (702) is rotatably connected in the installation shell (701), a sliding seat (703) is threadedly connected to the double-headed threaded rod (702), the sliding seat (703) and the installation shell (701) are sleeve-connected, a clamping plate (704) is fixedly connected to the sliding seat (703), the clamping plate (704) and the guard plate (203) are fixedly connected, a bayonet (705) is fixedly connected to the sliding seat (703), and the bayonet (705) and the installation shell (701) are sleeve-connected.

6. The impeller casting device according to claim 5, characterized in that: A hand wheel (8) is fixedly connected to the double-headed threaded rod (702).

7. The impeller casting device according to claim 6, characterized in that: A reinforcing rib (9) is fixedly connected to the hanging bracket (1).

8. The impeller casting device according to claim 7, characterized in that: The guard plate (203) is provided with a frame (10), and an impeller mold (11) is fixedly connected to the frame (10).

9. The method for using the impeller casting device according to claim 8, characterized in that: The following steps are involved: Step 1: When using the lifting bracket (1), the impeller mold (11) is placed between the two guard plates (203), and the double-headed threaded rod (702) in the mounting shell (701) is rotated to drive the two slides (703) to move toward each other in the mounting shell (701), and then the slides (703) drive the guard plates (203) to move through the clamping plates (704) to achieve clamping of both sides of the impeller mold (11); Step 2: Move the right-angle plate (204) in the guard plate (203) and clamp it on the frame (10), and use the positioning pin (205) to insert it into the corresponding threaded hole (12) of the right-angle plate (204) to determine the use position of the right-angle plate (204); Step 3: The pulley (4) at the top of the lifting bracket (1) can be used to lift the entire mechanism. During the lifting process, the output end of the hydraulic rod (601) drives the connecting plate (602) to move. When the connecting plate (602) moves along the outer wall of the cylindrical pin (603), the tooth plate (604) moves together with the connecting plate (602) to drive the tooth plate (604) to drive the connecting shaft (201) to rotate in the lifting bracket (1) through the gear (605). As the connecting shaft (201) rotates, the corresponding position of the impeller mold (11) is changed, thereby facilitating the lifting of the impeller mold.

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