Filter screen rapid clamping device for silica sol precision casting

Abstract

The utility model relates to the technical field of precision investment casting, in particular to a filter screen quick clamping device for precision silica sol casting, which comprises a fixed frame and a movable frame which are hinged through a movable hinge, spring holes are arranged at two ends of the side edge of the fixed frame relative to the movable hinge, and the spring holes are communicated with the movable hinge. A pressing block is arranged at the position, corresponding to the spring hole, of the side edge of the movable frame, a locking hole is formed in the side edge, opposite to the movable hinge, of the fixed frame, a pressing rotary locking device is arranged at the position, corresponding to the locking hole, of the side edge of the movable frame, and the filter screen is in lap joint with the top of the side edge of the fixed frame. The filter screen replacing device is simple and convenient to operate, the filter screen replacing efficiency is further improved, and meanwhile contact between an operator and the filter screen replacing device is reduced as much as possible so as to ensure that the operator can replace and clamp the filter screen in a high-temperature environment.

Description

Technical Field

[0001] This utility model relates to the field of investment casting technology, and in particular to a quick clamping device for a filter screen used in silica sol precision casting. Background Technology

[0002] Investment casting is a near-net-shape casting process with the highest precision and widest adaptability. It is widely used in the aerospace industry. Wax is the most basic guarantee of product quality. Filtration in the dewaxing process is a key step to ensure the quality of wax recycling. To ensure the purity of the wax, the filter screen needs to be replaced regularly and frequently.

[0003] To improve the efficiency of filter replacement, Chinese patent CN201978616U discloses a quick-change filter device for an air purification filter. It uses a detachable hinge bolt and nut to connect a fixed clip and a movable clip. When the filter needs to be replaced, the nut on the hinge bolt is loosened, the hinge bolt is rotated, and the movable clip is removed to perform the replacement operation. However, it is worth considering that, on the one hand, using a bolt and nut disassembly structure requires additional heat insulation measures in the high-temperature environment of wax filtration, and the disassembly and replacement efficiency needs further improvement; on the other hand, after loosening the bolt, the movable clip must be manually removed, which further prolongs the operation in the high-temperature environment, thus presenting certain limitations.

[0004] Therefore, in order to solve the above problems, a more suitable facility that meets the needs of users is needed. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a quick clamping device for filter screens used in silica sol precision casting, so as to further improve the efficiency of filter screen clamping and replacement, and solve the problem of excessively long clamping and replacement time in existing devices under high temperature conditions.

[0006] To achieve the above objectives, this utility model provides a quick clamping device for a filter screen used in precision casting of silica sol, comprising a fixed frame and a movable frame. A movable hinge is hinged between one side of the fixed frame and one side of the movable frame, with a maximum opening angle of 180°. Two spring holes are respectively provided at both ends of the other side of the fixed frame opposite to the movable hinge, and a compression spring is provided inside the spring holes. A locking hole is provided in the middle of the other side of the fixed frame opposite to the movable hinge. Two clamping blocks are respectively provided at both ends of the other side of the movable frame opposite to the movable hinge. A press-rotate locking device is provided in the middle of the other side of the movable frame opposite to the movable hinge. A filter screen is attached to the top of the side of the fixed frame.

[0007] Furthermore, the sum of the thickness of the clamping block and the height of the clamping spring is greater than the depth of the spring hole.

[0008] With the above technical solution, when the movable frame and the fixed frame are locked, the clamping block compresses the clamping spring to store potential energy. When the movable frame is unlocked, the clamping spring generates a restoring force to automatically open the movable frame.

[0009] Furthermore, the locking hole includes a slide rail and a locking part located adjacent to the bottom of the slide rail. The slide rail has a cross-section of a circular hole with lugs on both sides. The locking part has a cross-section of a circular hole with a diameter equal to the sum of the diameter of the circular hole in the slide rail and the side lengths of the two lugs. The height of the locking hole is less than the side thickness of the fixed frame. The press-rotate locking device includes a slide rod and a locking housing. The slide rod is integrally equipped with a pin, a connecting rod, and a control body from bottom to top. The pin is sized to match the circular hole in the cross-section of the slide rail. Two protrusions are provided on both sides of the bottom of the pin, which are adapted to the lugs in the cross-section of the slide rail. The diameter of the connecting rod is smaller than that of the pin. The control body is close to the inner wall of the locking housing and has a press knob fixedly connected to its top. A limiting disc is provided at the bottom of the locking housing. The pin is located below the limiting disc. The connecting rod passes through the limiting disc and is slidably connected to the limiting disc. Press springs are provided at the top of the limiting disc and the bottom of the control body.

[0010] With the above technical solution, the pin slides and rotates inside the locking hole to lock and release the movable frame, which is easy to operate.

[0011] Furthermore, the push-button knob is made of silicone rubber, whose heat insulation properties make it more suitable for high-temperature environments.

[0012] Furthermore, several threaded holes are provided on the side of the fixed frame for fixing the fixed frame in the use position.

[0013] Beneficial effects: This utility model controls the locking and unlocking of the movable frame and the fixed frame by setting a push knob. The movable frame is quickly opened when the compression spring is released. The operation is simple and further improves the labor efficiency of filter replacement. At the same time, it minimizes the contact between the operator and the device to ensure that the filter replacement can be performed even in high-temperature environments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0015] Figure 2 This is a cross-sectional schematic diagram of the spring hole opening and locking in an embodiment of the present utility model;

[0016] Figure 3 This is a cross-sectional schematic diagram of the locking hole in an embodiment of the present invention;

[0017] Figure 4 This is a cross-sectional schematic diagram of the locking hole and the pressing and rotating locking device in an embodiment of the present invention, showing the opening and locking.

[0018] The markings in the diagram are as follows: 1. Fixed frame; 2. Movable frame; 3. Movable hinge; 4. Spring hole; 5. Compression spring; 6. Locking hole; 601. Slide rail; 602. Locking part; 7. Compression block; 8. Press-rotate locking device; 801. Slide rod; 8011. Pin; 8012. Connecting rod; 8013. Control body; 802. Locking housing; 803. Protrusion; 804. Press knob; 805. Limiting disc; 806. Press spring; 9. Filter screen; 10. Threaded hole. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0020] This embodiment presents a quick-clamping device for a filter screen used in precision casting of silica sol, such as... Figure 1 As shown, this device consists of a fixed frame 1 and a movable frame 2 hinged together by a movable hinge 3. The maximum opening angle of the movable hinge 3 is 180°. The fixed frame 1 can be fixed to the usage position through multiple threaded holes 10 on the side. The filter screen 9 overlaps the top side of the fixed frame 1. The fixed frame 1 has spring holes 4 at both ends of the side of the movable hinge 3. The movable frame 2 has a pressing block 7 at the corresponding position of the spring hole 4 on the side, which is used to quickly open the movable frame 2 when the fixed frame 1 is unlocked. The fixed frame 1 has a locking hole 6 at the side of the movable hinge 3. The movable frame 2 has a pressing and rotating locking device 8 through and fixedly connected at the corresponding position of the locking hole 6 on the side, which is used to control the locking and unlocking of the movable frame and the fixed frame.

[0021] like Figure 2 As shown, the working process and principle of the spring hole 4 and the clamping block 7 in this embodiment are as follows: When the fixed frame 1 and the movable frame 2 are in the loose state, the clamping spring 5 inside the spring hole 4 is in the relaxed state; when the fixed frame 1 and the movable frame 2 are in the locked state, the clamping block 7 presses against and compresses the clamping spring 5 to continue its potential energy; when the fixed frame 1 and the movable frame 2 are unlocked, the clamping spring 5 rebounds and opens the movable frame 2, the clamping spring 5 returns to its relaxed state, and the movable frame 2 opens automatically.

[0022] like Figure 3 and Figure 4As shown, the working process and principle of the press-rotate locking device 8 are as follows: The locking hole 6 structure includes a slide rail 601 and a locking part 602. The slide rail 601 has a cross-section of a circular hole with lugs on both sides. The locking part 602 is located below the slide rail 601, forming an enlarged hollow part. When the clamping device in this embodiment is locked in the working state, the slide rod 801 inside the locking housing 802 moves down, and the protrusions 803 on both sides of the bottom pin 8011 of the slide rod 801 are engaged with the bottom of the slide rail 601 (i.e., the top of the locking part 602). The pressing spring 806 is in a compressed state. When the filter screen 9 needs to be replaced, the pressing knob 804 on the top of the control body 8013 is rotated. The pin 8011 and the protrusions 803 integrated with the control body 8013 rotate accordingly. When the protrusions 803 rotate to below the lugs of the slide rail 601, due to the rebound action of the pressing spring 806, The pin 8011 and the protrusion 803 slide upward within the slide rail 601, thereby driving the connecting rod 8012 to slide upward through the limiting disc 805. When the pin 8011 contacts the bottom of the limiting disc 805, it stops sliding upward, the movable frame 2 unlocks, and the aforementioned clamping spring 5 automatically springs open and opens the movable frame 2, at which point the filter screen 9 can be quickly replaced. After replacement, hold the pressing knob 804 and pull the movable frame 2 close to the fixed frame 1, ensuring that the protrusion 803 is aligned with the lug on the cross section of the slide rail 601. Insert the pin 8011 and the protrusion 803 into the slide rail 601, press the pressing knob 804 to make the pin 8011 probe into the locking part 602, compress the pressing spring 806, rotate the pressing knob 804 to make the protrusion 803 shift to the vertical direction of the lug, and then the lug is locked at the bottom of the slide rail 601 (i.e., the top of the locking part 602) to complete the locking.

Claims

1. A quick clamping device for a filter screen used in silica sol precision casting, comprising a fixed frame (1) and a movable frame (2), characterized in that, A hinge (3) is hinged between one side of the fixed frame (1) and one side of the movable frame (2). Two spring holes (4) are provided at both ends of the other side of the fixed frame (1) opposite to the movable hinge (3). A compression spring (5) is provided inside the spring hole (4). A locking hole (6) is opened in the middle of the other side of the fixed frame (1) opposite to the movable hinge (3). Two clamping blocks (7) are provided at both ends of the other side of the movable frame (2) opposite to the movable hinge (3). A press-rotate locking device (8) is provided in the middle of the other side of the movable frame (2) opposite to the movable hinge (3). A filter screen (9) is attached to the top of the side of the fixed frame (1).

2. The quick-clamping device for silica sol precision casting filter screen according to claim 1, characterized in that, The maximum opening angle of the movable hinge (3) is 180°.

3. The quick-clamping device for silica sol precision casting filter screen according to claim 1, characterized in that, The sum of the thickness of the clamping block (7) and the height of the clamping spring (5) is greater than the depth of the spring hole (4).

4. The quick-clamping device for silica sol precision casting filter screen according to claim 1, characterized in that, The locking hole (6) includes a slide rail (601) and a locking part (602) located adjacent to the slide rail (601) below it. The slide rail (601) has a cross-section of a circular hole with lugs on both sides. The locking part (602) has a cross-section of a circular hole with a diameter equal to the sum of the diameter of the circular hole in the cross-section of the slide rail (601) and the side length of the two lugs. The height of the locking hole (6) is less than the side thickness of the fixed frame (1).

5. The quick-clamping device for silica sol precision casting filter screen according to claim 4, characterized in that, The press-and-rotate locking device (8) includes a slide rod (801) and a locking housing (802). The slide rod (801) is integrally provided with a pin (8011), a connecting rod (8012), and a control body (8013) from bottom to top. The size of the pin (8011) is adapted to the circular hole in the cross-section of the slide rail (601). Two protrusions (803) are provided on both sides of the bottom of the pin (8011). The protrusions (803) are adapted to the lugs in the cross-section of the slide rail (601). The diameter of the connecting rod (8012) is... The control body (8013) is attached to the inner wall of the locking housing (802) and is fixedly connected to the top of the pin (8011). The bottom of the locking housing (802) is provided with a limiting disc (805). The pin (8011) is located below the limiting disc (805). The connecting rod (8012) passes through the limiting disc (805) and is slidably connected to the limiting disc (805). The top of the limiting disc (805) and the bottom of the control body (8013) are provided with pressing springs (806).

6. The quick-clamping device for silica sol precision casting filter screen according to claim 5, characterized in that, The push knob (804) is made of silicone rubber.

7. The quick-clamping device for silica sol precision casting filter screen according to claim 1, characterized in that, The fixed frame (1) has several threaded holes (10) on its side for fixing the fixed frame (1) in the use position.

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