Reducing screw shaft for stacked screw type sludge dewatering machine

Abstract

The utility model discloses a reducing screw shaft for a stacked screw type sludge dewatering machine, which belongs to the technical field of sludge dewatering machines and comprises an outer rod, a screw blade positioned on the outer side of the outer rod and mounted along the length direction of the outer rod, a shaft hole formed in the axis position in the outer rod and an inner rod penetrating through the inside of the shaft hole. The spline groove is formed in the inner wall of the shaft hole, and the guide block matched with the spline groove is arranged on the inner rod in the circumferential direction, so that torque applied to the inner rod can be uniformly transmitted to the outer rod in the driving process of the spiral shaft, the transmission stability between the inner rod and the outer rod is guaranteed, and the service life of the spiral shaft is prolonged. The end plate is fixedly arranged at one end of the inner rod, and the limiting mechanism composed of the mounting groove, the reset spring, the check block and the inclined face is arranged at the other end of the inner rod, so that after the inner rod penetrates through the interior of the shaft hole, the two ends of the outer rod can be limited through cooperation of the end plate and the limiting mechanism, and the device is more convenient to assemble; and the practicability is higher.

Description

Technical Field

[0001] The utility model relates to a variable diameter spiral shaft, in particular to a variable diameter spiral shaft for a stacked screw type sludge dewatering machine, belonging to the technical field of sludge dewatering machines. Background Art

[0002] In the prior art, the utility model with publication number 202021255604.8 discloses a spiral shaft for a spiral stacked sludge dewatering machine. In order to solve the problem that when the spiral blades need to be replaced, the spiral shaft needs to be replaced as a whole, which will not only cause waste, but also increase the cost of use to a certain extent. By setting the annular thread groove, annular thread block, connecting block, through groove, first threaded rod and thread, the thread and the annular thread block can be disengaged from the corresponding grooves respectively by rotating the connecting block, so that the fixing of the connecting block to the outer rod can be released. Through the set outer rod and connecting groove, the spiral blade can be separated from the inner rod by pulling the outer rod away from the outside of the inner rod, so that the new spiral blade can be replaced, which effectively solves the problem that the spiral blades on the general spiral shaft cannot be disassembled. Therefore, when the spiral blades need to be replaced, the spiral shaft needs to be replaced as a whole, which will increase the cost of use to a certain extent.

[0003] Similar to the above application, there are still some shortcomings:

[0004] The outer rod and the inner rod are connected by threads only through the connecting block at the end. During the rotational drive process, the torque on the outer rod cannot be evenly transmitted to the outer rod. The torque is only transmitted through the connecting block. The connecting block is easily damaged when subjected to a large load, which affects the service life of the device. In addition, during the installation of the device, the threaded connection is used, which cannot be assembled quickly.

[0005] Therefore, a spiral stacking sludge dewatering machine with a variable diameter spiral shaft is designed to optimize the above problems. Utility Model Content

[0006] The main purpose of the utility model is to provide a variable diameter spiral shaft for a spiral stacked sludge dewatering machine, by opening a spline groove on the inner wall of the shaft hole, and providing a guide block that cooperates with the spline groove on the inner rod along the circumferential direction, so that during the driving of the spiral shaft, the torque applied to the inner rod can be evenly transmitted to the outer rod, thereby ensuring the stability of the transmission between the inner rod and the outer rod, by fixing an end plate at one end of the inner rod, and providing a limiting mechanism composed of an installation groove, a return spring, a stop block, and an inclined surface at the other end of the inner rod, after the inner rod passes through the interior of the shaft hole, the cooperation of the end plate and the limiting mechanism can be used to limit the two ends of the outer rod respectively, so that the assembly of the device is more convenient and more practical.

[0007] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0008] A variable diameter spiral shaft for a spiral stacked sludge dewatering machine comprises an outer rod, a spiral blade located on the outside of the outer rod and installed along the length direction of the outer rod, an axial hole opened at the axial center position inside the outer rod, and an inner rod passing through the axial hole. The inner wall of the axial hole is evenly provided with spline grooves along the circumferential direction, and the spline grooves are parallel to the length direction of the axial hole. Guide blocks are evenly provided on the outside of the inner rod along the circumferential direction. The guide blocks are slidably arranged inside the spline grooves. An end plate that fits the end of the outer rod is fixed at one end of the inner rod, and a positioning mechanism that limits the end of the outer rod is provided at the other end of the inner rod.

[0009] Preferably, the side of the end plate that fits with the outer rod is in a truncated cone shape, and the end of the outer rod is provided with a groove that fits with the side of the end plate.

[0010] Preferably, the number of guide blocks is four groups, the angle between adjacent guide blocks is 90°, and both ends of the guide blocks are beveled edges.

[0011] Preferably: the positioning mechanism includes an installation groove, a return spring and a stopper, the outer side of the inner rod is evenly provided with installation grooves along the circumferential direction, the inner ends of the installation grooves are all installed with return springs, the ends of the return springs away from the interior of the installation grooves are all fixed with stoppers, and the stoppers are slidably arranged inside the installation grooves.

[0012] Preferably, the top of each stopper is provided with an inclined surface, and the inclined surface is located on a side of the top of the stopper away from the end plate.

[0013] Preferably, a protective cover is provided at one end of the inner rod close to the mounting groove, and the protective cover is threadedly connected to the inner rod.

[0014] Preferably, bolts are rotatably mounted on the outer ends of the stoppers, and the bolts penetrate the stoppers, and threaded holes matching the bolts are formed at the inner ends of the mounting grooves.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides a variable diameter spiral shaft for a stacked screw type sludge dewatering machine, which has a spline groove on the inner wall of the shaft hole and a guide block matched with the spline groove on the inner rod along the circumferential direction, so that during the driving process of the spiral shaft, the torque applied to the inner rod can be evenly transmitted to the outer rod, thereby ensuring the stability of the transmission between the inner rod and the outer rod;

[0017] An end plate is fixedly provided at one end of the inner rod, and a limiting mechanism consisting of an installation groove, a return spring, a stopper, and an inclined surface is provided at the other end of the inner rod, so that after the inner rod passes through the shaft hole, the two ends of the outer rod can be limited respectively by the cooperation of the end plate and the limiting mechanism, making the assembly of the device more convenient and more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the front view of the utility model;

[0019] Figure 2 This is a front cross-sectional view of the utility model;

[0020] Figure 3 For the utility model Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 This is a structural diagram of the outer rod end of the utility model.

[0022] In the figure: 1. outer rod; 2. spiral blade; 3. shaft hole; 4. inner rod; 5. spline groove; 6. guide block; 7. end plate; 8. mounting groove; 9. return spring; 10. stop block; 11. inclined surface; 12. bolt; 13. threaded hole; 14. protective cover. DETAILED DESCRIPTION

[0023] In order to make the technical solution of the utility model more clear and specific to those skilled in the art, the utility model is further described in detail below in conjunction with embodiments and drawings, but the implementation methods of the utility model are not limited thereto.

[0024] like Figure 1-Figure 4 As shown, this embodiment provides a variable diameter spiral shaft for a spiral stacked sludge dewatering machine, comprising an outer rod 1, a spiral blade 2 located on the outside of the outer rod 1 and installed along the length direction of the outer rod 1, an axial hole 3 opened at the axial center position inside the outer rod 1 and an inner rod 4 passing through the axial hole 3, the inner wall of the axial hole 3 is evenly provided with spline grooves 5 along the circumferential direction, and the spline grooves 5 are parallel to the length direction of the axial hole 3, the outer side of the inner rod 4 is evenly provided with guide blocks 6 along the circumferential direction, the guide blocks 6 are slidably arranged inside the spline grooves 5, one end of the inner rod 4 is fixed with an end plate 7 that fits with the end of the outer rod 1, and the other end of the inner rod 4 is provided with a positioning mechanism for limiting the end of the outer rod 1.

[0025] Overall working principle: During the assembly of the device, the inner rod 4 is placed on the thick end of the outer rod 1 and aligned with the shaft hole 3, the guide block 6 on the outside of the inner rod 4 is aligned with the spline groove 5, and then the inner rod 4 is horizontally inserted and passed through the other end of the outer rod 1. When the end plate 7 fits with the end of the outer rod 1, the position of the inner rod 4 is fixed, and then the positioning mechanism is used to limit and fix the inner rod 4 and the other end of the outer rod 1. At this time, the variable diameter spiral shaft is assembled. In the case of damage to the spiral blade 2, only the outer rod 1 needs to be replaced.

[0026] In this embodiment, the side of the end plate 7 that is in contact with the outer rod 1 is in a truncated cone shape, and a groove that is in contact with the side of the end plate 7 is formed at the end of the outer rod 1 .

[0027] Partial working principle: The frustoconical design of the side of the end plate 7 can ensure that the end plate 7 is aligned with the end of the outer rod 1, correct the position of the inner rod 4, and ensure the installation effect.

[0028] In this embodiment, there are four groups of guide blocks 6 , and the angle between adjacent guide blocks 6 is 90°. Both ends of the guide blocks 6 are beveled edges.

[0029] Local working principle: By setting up multiple groups of guide blocks 6, the torque transmission effect can be guaranteed. In addition, the setting of the beveled edge at the end of the guide block 6 can facilitate insertion during installation.

[0030] In this embodiment, the positioning mechanism includes an installation groove 8, a return spring 9 and a stopper 10. The outer side of the inner rod 4 is evenly provided with installation grooves 8 along the circumferential direction. The inner end of the installation groove 8 is installed with a return spring 9. The end of the return spring 9 away from the inside of the installation groove 8 is fixed with a stopper 10, and the stopper 10 is slidably arranged inside the installation groove 8.

[0031] Local working principle: when the inner rod 4 is inserted for installation, the stopper 10 is pressed into the inside of the installation groove 8, and then the inner rod 4 is inserted from the inside of the shaft hole 3. After the stopper 10 passes through the inside of the shaft hole 3, the stopper 10 loses the obstruction of the shaft hole 3, and the stopper 10 is reset by the elastic force of the reset spring 9. The vertical surface of the stopper 10 fits with the end of the outer rod 1, automatically limiting the end face of the outer rod 1.

[0032] In this embodiment, the top of each stopper 10 is provided with an inclined surface 11 , and the inclined surface 11 is located at a side of the top of the stopper 10 away from the end plate 7 .

[0033] Local working principle: Due to the setting of the inclined surface 11 at the end of the stopper 10, when the inner rod 4 is inserted, the end of the shaft hole 3 will directly contact the inclined surface 11, exerting an extrusion force on the stopper 10, and automatically compressing the stopper 10 into the inside of the installation groove 8.

[0034] In this embodiment, a protective cover 14 is provided at one end of the inner rod 4 close to the mounting groove 8 , and the protective cover 14 is threadedly connected to the inner rod 4 .

[0035] Partial working principle: By using the protective cover 14, the position of the stopper 10 can be kept stable and interference from foreign objects can be avoided.

[0036] In this embodiment, the outer ends of the stoppers 10 are rotatably mounted with bolts 12 , and the bolts 12 penetrate the stoppers 10 , and the inner ends of the mounting grooves 8 are provided with threaded holes 13 that cooperate with the bolts 12 .

[0037] Local working principle: when the outer rod 1 and the inner rod 4 need to be removed, squeeze the block 10 toward the inside of the mounting groove 8, and then rotate the bolt 12. At this time, the bolt 12 enters the inside of the threaded hole 13, fixes the position of the block 10, hides the block 10, and facilitates the removal of the inner rod 4.

[0038] The above is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the scope disclosed by the present invention according to the technical solution and concept of the present invention, which fall within the protection scope of the present invention.

Claims

1. A variable diameter screw shaft for a stacked screw type sludge dewatering machine, comprising an outer rod (1), a spiral blade (2) located outside the outer rod (1) and installed along the length direction of the outer rod (1), an axial hole (3) opened at the axial center position inside the outer rod (1), and an inner rod (4) passing through the axial hole (3), characterized in that: The inner wall of the shaft hole (3) is evenly provided with spline grooves (5) along the circumferential direction, and the spline grooves (5) are parallel to the length direction of the shaft hole (3). The outer side of the inner rod (4) is evenly provided with guide blocks (6) along the circumferential direction. The guide blocks (6) are slidably arranged inside the spline grooves (5). An end plate (7) that fits with the end of the outer rod (1) is fixed to one end of the inner rod (4), and a positioning mechanism for limiting the end of the outer rod (1) is provided at the other end of the inner rod (4).

2. The variable diameter screw shaft for a screw stack type sludge dewatering machine according to claim 1, characterized in that: The side of the end plate (7) that fits the outer rod (1) is in a truncated cone shape, and the end of the outer rod (1) is provided with a groove that fits the side of the end plate (7).

3. The variable diameter screw shaft for a screw stack type sludge dewatering machine according to claim 1, characterized in that: The number of guide blocks (6) is four, and the angle between adjacent guide blocks (6) is 90°, and both ends of the guide blocks (6) are beveled edges.

4. The variable diameter screw shaft for a screw stack type sludge dewatering machine according to claim 1, characterized in that: The positioning mechanism comprises a mounting groove (8), a return spring (9) and a stopper (10); the outer side of the inner rod (4) is evenly provided with the mounting groove (8) along the circumferential direction; the inner end of the mounting groove (8) is provided with a return spring (9); the end of the return spring (9) away from the inside of the mounting groove (8) is fixed with a stopper (10); and the stopper (10) is slidably arranged inside the mounting groove (8).

5. The variable diameter screw shaft for a screw stack type sludge dewatering machine according to claim 4, characterized in that: The top of each stopper (10) is provided with an inclined surface (11), and the inclined surface (11) is located on a side of the top of the stopper (10) away from the end plate (7).

6. The variable diameter screw shaft for a screw stack type sludge dewatering machine according to claim 5, characterized in that: A protective cover (14) is provided at one end of the inner rod (4) close to the mounting groove (8), and the protective cover (14) is threadedly connected to the inner rod (4).

7. A variable diameter screw shaft for a screw stack type sludge dewatering machine according to any one of claims 4 to 6, characterized in that: The outer end of the stopper (10) is rotatably mounted with a bolt (12), and the bolt (12) penetrates the stopper (10), and the inner end of the mounting groove (8) is provided with a threaded hole (13) matched with the bolt (12).

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