A seal structure of a screen changer main shaft

Abstract

The application discloses a sealing structure of a screen changer spindle, comprising a screen changer body, a spindle, a filter screen and a sealing structure, characterized in that the sealing structure comprises a ring groove arranged at the bottom of the screen changer body, a sealing ring is sleeved in the ring groove, a threaded ring is fixed at the bottom of the screen changer body, a gland is threadedly installed on the threaded ring, the top end of the gland abuts against the outward end face of the sealing ring, and an anti-loosening structure is further arranged at one side of the bottom of the screen changer and is used for limiting the rotation of the gland. In daily use, the threaded ring is pressed against the sealing ring by rotating the gland, then the anti-loosening structure is operated to fix the gland, the threads between the gland and the threaded ring are prevented from loosening and losing the pressure on the sealing ring, and the sealing effect of the sealing ring on the screen changer body and the spindle is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of screen changer, concretely relates to a sealing structure of screen changer spindle. BACKGROUND

[0002] Now, the filter screen effect of cast film is poor and needs to be replaced frequently, and the poor filtering effect will cause the cast film to have more black spots, holes and crystal points, and the current column type screen changer filters through the core shaft on which the filter screen is installed, for example:

[0003] The sealing structure of the screen changer disclosed in CN117722501A seals the sealing ring through the sealing ring seat to compress the sealing washer, seals the sealing structure and the screen changer body, and compresses the sealing ring to seal the sealing structure and the core shaft, but the sealing structure is fixed through bolts, and the screen changer body works in high-temperature melt, which causes the structure temperature to increase, and the temperature to decrease when stopping working, so that the bolts are loose under the condition of repeated thermal expansion and cold contraction, which affects the sealing effect of the sealing structure, and it is difficult to ensure that the tightening degree of each bolt is the same, so that the stress of the sealing washer is slightly different, but the slight difference will cause the sealing ring and the shaft to have a relatively weak point, which affects the sealing effect. SUMMARY

[0004] The utility model aims at solving one of the technical problems existing in the prior art.

[0005] The application provides a sealing structure of a screen changer spindle, which comprises a screen changer body, a spindle, a filter screen and a sealing structure, the sealing structure comprises a ring groove arranged at the bottom of the screen changer body, a sealing ring is sleeved in the ring groove, a threaded ring is fixed at the bottom of the screen changer body, a gland is installed on the threaded ring through threads, the top end of the gland abuts against the outward end face of the sealing ring, and a loosening prevention structure is further arranged on one side of the bottom of the screen changer.

[0006] The loosening prevention structure comprises an outer ring fixed on the outer circle of the gland, a plurality of clamping grooves are arranged on the outer circle of the outer ring at intervals, a mounting bracket is fixed at the bottom of the screen changer body, a plug rod and a control member are slidingly installed in the mounting bracket, and the control member is used to control the plug rod to enter / exit the corresponding clamping groove.

[0007] The telescopic mounting bracket comprises a pair of vertical plates fixed at the bottom of the screen changer body, a sliding groove is formed between the pair of vertical plates, a sliding hole is arranged on each vertical plate, a pair of sliding holes are coaxial and the axis is perpendicular to the axis of the spindle, the plug rod is slidingly inserted into the pair of sliding holes, and the control member is installed in the sliding groove.

[0008] The control member comprises a floating frame sleeved on the insertion rod, the left and right side walls of the floating frame are respectively slidably abutted against the adjacent side walls of a pair of vertical plates, a spring is arranged between the bottom of the inner cavity of the floating frame and the bottom of the peripheral wall of the insertion rod, the floating frame and the insertion rod are drivingly connected through a transmission member, and the insertion rod is inserted into / withdrawn from the clamping groove when the floating frame is lowered / raised.

[0009] The transmission member comprises an inclined groove penetrating through the insertion rod in front and back directions, a sliding rod is slidably installed in the inclined groove, the sliding rod is fixedly connected with the front and back inner walls of the floating frame at both ends, and the vertical height of the end of the inclined groove close to the gland is higher than the vertical height of the other end.

[0010] The gland comprises a bottom ring and a pressing ring, the outer ring of the pressing ring is threadedly connected with the inner ring of the threaded ring, the bottom ring is fixedly arranged at the bottom end of the pressing ring, and the outer ring diameter of the bottom ring is greater than or equal to the outer ring diameter of the threaded ring.

[0011] The inner peripheral wall of the outer ring is slidably and frictionally connected with the outer peripheral wall of the threaded ring.

[0012] The utility model discloses the following beneficial effects:

[0013] Through the setting of the threaded ring, the floating frame, the sliding rod, the inclined groove, the clamping groove, the outer ring, the spring, the bottom ring and the pressing ring, the sealing ring is pressed and fixed, compared with the prior art, the insertion rod and the clamping groove are not affected by the thermal expansion and contraction, the pressing effect on the sealing ring is ensured, meanwhile, the sealing ring is pressed tightly at all places through the threaded cooperation, there is no weak position, and the sealing effect is better. DRAWINGS

[0014] Figure 1 It is the sealing structure front view of the main shaft of the screen changer in the embodiment of the application;

[0015] Figure 2 It is the sealing structure sectional view of the main shaft of the screen changer in the embodiment of the application;

[0016] Figure 3 It is Figure 2 It is the local enlarged structure schematic view of A in the middle;

[0017] Figure 4 It is the top view of the anti-loosening structure in the embodiment of the application.

[0018] REFERENCE SIGNS

[0019] 1-screen changer main body, 2-main shaft, 3-filter screen, 4-sealing structure, 41-ring groove, 42-sealing ring, 43-threaded ring, 44-gland, 441-bottom ring, 442-pressing ring, 45-anti-loosening structure, 451-outer ring, 452-clamping groove, 453-mounting frame, 4531-vertical plate, 4532-sliding groove, 4533-sliding hole, 454-insertion rod, 455-control member, 4551-floating frame, 4552-spring, 5-transmission member, 51-inclined groove, 52-sliding rod. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0021] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0022] The sealing structure of the screen changer spindle provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0023] Example:

[0024] like Figures 1 to 4 As shown, this application embodiment provides a sealing structure 4 for the main shaft of a screen changer, including a screen changer body 1, a main shaft 2, a filter screen 3 and a sealing structure 4. The sealing structure 4 includes an annular groove 41 disposed at the bottom of the screen changer body 1, a sealing ring 42 sleeved in the annular groove 41, a threaded ring 43 fixedly disposed at the bottom of the screen changer body 1, and a pressure cap 44 threadedly mounted on the threaded ring 43. The top end of the pressure cap 44 abuts against the outer end face of the sealing ring 42. An anti-loosening structure 45 is also provided on one side of the bottom of the screen changer, which is used to restrict the rotation of the pressure cap 44.

[0025] Furthermore, the anti-loosening structure 45 includes an outer ring 451 fixed on the outer ring of the pressure cap 44. A plurality of slots 452 are provided at intervals on the outer ring of the outer ring 451. A mounting frame 453 is fixed on the bottom of the screen changer body 1. A plug rod 454 and a control component 455 are slidably installed in the mounting frame 453. The control component 455 is used to control the plug rod 454 to enter / exit the corresponding slot 452.

[0026] Further, the telescopic mounting frame 453 comprises a pair of vertical plates 4531 fixed at the bottom of the screen changer main body 1, a sliding groove 4532 is formed between the pair of vertical plates 4531, a sliding hole 4533 is arranged on each of the pair of vertical plates 4531, the sliding holes 4533 are coaxial and the axis is perpendicular to the axis of the main shaft 2, the plug rod 454 is slidingly arranged in the pair of sliding holes 4533, and the control member 455 is arranged in the sliding groove 4532.

[0027] Further, the control member 455 comprises a floating frame 4551 sleeved on the plug rod 454, the left and right side walls of the floating frame 4551 are slidingly abutted against the adjacent side walls of the pair of vertical plates 4531, the spring 4552 is arranged between the bottom of the inner cavity of the floating frame 4551 and the bottom of the peripheral wall of the plug rod 454, the floating frame 4551 and the plug rod 454 are drivingly connected through the transmission member 5, and the plug rod 454 is inserted into / withdrawn from the clamping groove 452 when the floating frame 4551 is lowered / raised.

[0028] Further, the transmission member 5 comprises an inclined groove 51 penetrating through the plug rod 454 from front to back, a sliding rod is slidingly arranged in the inclined groove 51, the sliding rod is fixedly connected with the front and rear inner walls of the floating frame 4551 at both ends, and the vertical height of the end of the inclined groove 51 close to the gland 44 is higher than that of the other end.

[0029] Further, the gland 44 comprises a bottom ring 441 and a pressing ring 442, the outer ring of the pressing ring 442 is threadedly connected with the inner ring of the threaded ring 43, the bottom ring 441 is fixedly arranged at the bottom end of the pressing ring 442, and the outer ring diameter of the bottom ring 441 is greater than or equal to the outer ring diameter of the threaded ring 43.

[0030] Further, the inner peripheral wall of the outer ring 451 and the outer peripheral wall of the threaded ring 43 are slidingly and frictionally connected.

[0031] In this embodiment of the present application, since the above structure is adopted, the bottom of the floating frame 4551 is pressed upward, the sliding rod is slidingly moved from the lower end to the higher end of the inclined groove 51, the sliding rod is pushed out of the clamping groove 452, the spring 4552 is compressed to store elastic potential energy, the outer ring 451 is rotated to make the bottom ring 441 close to the threaded ring 43, the pressing ring 442 is inserted into the inner ring of the threaded ring 43 and tightly presses the sealing ring 42, then the floating frame 4551 is released, the spring 4552 releases the elastic potential energy to push the floating frame 4551 and the sliding rod downward, the sliding rod is slidingly moved to the lower end of the inclined groove 51, the plug rod 454 is inserted into the corresponding clamping groove 452, and the fixing of the plug cover is completed.

[0032] The sliding and frictional connection between the inner peripheral wall of the outer ring 451 and the outer peripheral wall of the threaded ring 43 can improve the stability of the threaded connection between the pressing ring 442 and the threaded ring 43.

[0033] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a", "comprising", or "includes a", does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus of the present embodiments are not limited by the order of the steps or the order of the components, as described in the examples, but can include performing the steps in different order, or performing the steps concurrently, or in reverse order, or omitting one or more steps, or adding one or more steps, or adding, omitting, or combining various features of the examples described. Also, features described in relation to one example can be combined in other examples.

[0034] The embodiments of the present application described above are merely exemplary and are not intended to limit the present application to the above-described embodiments, but the above-described embodiments are merely illustrative, and the present application is not limited to the above-described embodiments. The embodiments of the present application described above are merely exemplary and are not intended to limit the present application to the above-described embodiments, but the above-described embodiments are merely illustrative, and the present application is not limited to the above-described embodiments.

Claims

1. A sealing structure for a screen changer spindle, comprising a screen changer body, a spindle, a filter screen, and a sealing structure, characterized in that, The sealing structure includes an annular groove at the bottom of the screen changer body, a sealing ring sleeved in the annular groove, a threaded ring fixed at the bottom of the screen changer body, a pressure cap installed on the threaded ring by threads, the top of the pressure cap abutting against the outer end face of the sealing ring, and an anti-loosening structure on one side of the bottom of the screen changer to limit the rotation of the pressure cap.

2. The sealing structure of the main shaft of a screen changer according to claim 1, characterized in that, The anti-loosening structure includes an outer ring fixed to the outer ring of the pressure cap, with a number of slots spaced apart on the outer ring. A mounting frame is fixed to the bottom of the screen changer body, and a plug rod and a control component are slidably installed in the mounting frame. The control component is used to control the plug rod to enter / exit the corresponding slot.

3. The sealing structure of the main shaft of a screen changer according to claim 2, characterized in that, The telescopic mounting frame includes a pair of upright plates fixed to the bottom of the screen changer body, with a sliding groove formed between the pair of upright plates. Each pair of upright plates is provided with a sliding hole, and the pair of sliding holes are coaxial and the axis is perpendicular to the axis of the main shaft. The insertion rod is slidably inserted into the pair of sliding holes, and the control component is installed in the sliding groove.

4. The sealing structure of the main shaft of a screen changer according to claim 3, characterized in that, The control component includes a floating frame sleeved outside the insertion rod. The left and right side walls of the floating frame slide against the adjacent side walls of a pair of upright plates, respectively. A spring is provided between the bottom of the inner cavity of the floating frame and the bottom of the peripheral wall of the insertion rod. The floating frame and the insertion rod are connected by a transmission component. When the floating frame descends / rises, the insertion rod enters / exits the slot.

5. The sealing structure of the main shaft of a screen changer according to claim 4, characterized in that, The transmission component includes a slanted groove through which a front and rear insert rod passes. A sliding rod is slidably installed in the slanted groove. Both ends of the sliding rod are fixed to the inner walls of the front and rear sides of the floating frame, respectively. The vertical height of the slanted groove near the pressure cap is higher than that of the other end.

6. The sealing structure of the main shaft of a screen changer according to claim 2, characterized in that, The pressure cap includes a bottom ring and a pressure ring. The outer ring of the pressure ring is threaded to the inner ring of the threaded ring. The bottom ring is fixed at the bottom end of the pressure ring, and the outer ring diameter of the bottom ring is greater than or equal to the outer ring diameter of the threaded ring.

7. The sealing structure of the main shaft of a screen changer according to claim 2, characterized in that, The inner circumferential wall of the outer ring slides and rubs against the outer circumferential wall of the threaded ring.

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