Auxiliary fixture for mounting polytetrafluoroethylene sealing ring

Abstract

The utility model discloses a teflon seal ring installation auxiliary jig, including base, strutting subassembly and power unit, strutting subassembly includes the three movable support block that is provided on the base, forms the location area that is used for strutting teflon seal ring among the three movable support block, and the power unit is provided with the power unit. And the three movable supporting blocks synchronously move through the power unit, so that the size of the positioning area is changed. Then a transmission gear is externally connected with a power device, the transmission gear is made to rotate, the transmission gear is meshed with a tooth block to drive a rotary disc to rotate, along with rotation of the rotary disc, a spiral guide plate rotates all the time, sliding blocks can be driven to slide in a sliding groove one by one, movement of three movable supporting blocks is achieved, and the three movable supporting blocks synchronously move; the teflon sealing ring to be mounted is expanded to be full, so that the teflon sealing ring is convenient to mount, the overall structure is simple, the use is convenient, and the practicability is improved.

Description

Technical Field

[0001] The utility model specifically relates to an auxiliary fixture for installing a polytetrafluoroethylene sealing ring. Background Art

[0002] PTFE seals have excellent chemical corrosion resistance and can resist the erosion of various chemical substances such as acids, alkalis, salts, etc., and have an extremely low friction coefficient, which makes them highly efficient and have a long life in the sealing of moving parts.

[0003] At present, when installing the polytetrafluoroethylene sealing ring, the staff is required to open the entire interior so that it can be sleeved on the installation location. However, this process requires a lot of effort and time from the staff, which reduces work efficiency. Utility Model Content

[0004] The utility model aims to provide a polytetrafluoroethylene sealing ring installation auxiliary fixture to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a polytetrafluoroethylene sealing ring installation auxiliary fixture, comprising a base, a spreading assembly and a power unit, the spreading assembly comprising three movable support blocks arranged on the base, a positioning area for spreading the polytetrafluoroethylene sealing ring is formed between the three movable support blocks, and the three movable support blocks are synchronously moved by the power unit to change the size of the positioning area.

[0006] Preferably, the three movable support blocks sequentially extend outwards to have two protrusions with gradually decreasing heights, and the outer side of each protrusion is arc-shaped.

[0007] Preferably, a groove for placing a polytetrafluoroethylene sealing ring is provided on the arc-shaped outer side of the protrusion from the outside to the inside.

[0008] Preferably, a cavity is provided in the base, and the power unit comprises a turntable arranged in the cavity, and a plurality of gear blocks are provided on the lower surface of the turntable at equal intervals.

[0009] Preferably, a transmission gear is provided in the cavity and on the lower surface of the turntable, and the transmission gear is meshed with the gear block.

[0010] Preferably, a spiral guide plate is provided on the upper surface of the turntable, and a slide groove is formed between the guide plates.

[0011] Preferably, a plurality of sliding blocks are equidistantly arranged on the lower surfaces of the three movable support blocks, and the sliding blocks extend into the sliding grooves.

[0012] The technical effects and advantages of the utility model are as follows: the auxiliary fixture for installing the polytetrafluoroethylene sealing ring selects the polytetrafluoroethylene sealing ring to be sleeved in the groove opened on the outer side of the specific raised arc according to the size of the polytetrafluoroethylene sealing ring to be installed, and then the transmission gear is externally connected to a power device to rotate the transmission gear, and the transmission gear is meshed with the tooth block to drive the turntable to rotate. As the turntable rotates, the spiral guide plate rotates continuously, which drives the slider to slide one by one in the slide groove, realizing the movement of the three movable support blocks, and the three movable support blocks move synchronously to expand the polytetrafluoroethylene sealing ring to be installed, making it full, thereby facilitating its installation. The overall structure is simple, easy to use, and practicality is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model from a first perspective;

[0014] Figure 2 This is a schematic diagram of the internal structure of the base of the utility model;

[0015] Figure 3 It is a structural schematic diagram of the tooth block of the utility model;

[0016] Figure 4 It is a structural schematic diagram of the guide plate of the utility model.

[0017] In the figure: 1, base; 2, movable support block; 3, protrusion; 4, groove; 5, turntable; 6, gear block; 7, transmission gear; 8, guide plate; 9, slide groove; 10, slider. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] In order to facilitate the installation of the PTFE sealing ring, refer to Figure 1 , Figure 2 and Figure 3As shown, it includes a base 1, an expansion component and a power unit, the expansion component includes three movable support blocks 2 arranged on the base 1, and a positioning area for expanding the polytetrafluoroethylene sealing ring is formed between the three movable support blocks 2, and the three movable support blocks 2 are synchronously moved by the power unit to change the size of the positioning area. First, according to the size of the polytetrafluoroethylene sealing ring to be installed, the polytetrafluoroethylene sealing ring is selected to be sleeved in the groove 4 opened on the outer side of the arc of the specific protrusion 3, and then the transmission gear 7 is externally connected to the power device to rotate the transmission gear 7, and the transmission gear 7 is meshed with the tooth block 6 to drive the turntable 5 to rotate. As the turntable 5 rotates, the spiral guide plate 8 keeps rotating, which will drive the slider 10 to slide one by one in the slide groove 9, thereby realizing the movement of the three movable support blocks 2, and the three movable support blocks 2 move synchronously to expand the polytetrafluoroethylene sealing ring to be installed, so that it is full, thereby facilitating its installation. The overall structure is simple and easy to use.

[0020] In order to expand the PTFE sealing rings of different diameters, refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the three movable support blocks 2 extend outward in sequence to have two protrusions 3 with gradually decreasing heights, the outer side of each of the protrusions 3 is arc-shaped, the heights of the two protrusions 3 are different, and the sizes of the positioning areas formed between the protrusions 3 are also different, which can be selected according to the actual inner wall diameter of the polytetrafluoroethylene sealing ring to improve convenience and practicality. The arc-shaped outer side of the protrusion 3 is provided with a groove 4 for placing the polytetrafluoroethylene sealing ring from the outside to the inside, and the groove 4 is adapted to the polytetrafluoroethylene sealing ring. When the polytetrafluoroethylene sealing ring is sleeved into the groove 4, the fixation is completed. By moving the three movable support blocks 2, the polytetrafluoroethylene sealing ring can be stretched out to facilitate subsequent installation. A cavity is defined in the base 1, and the power unit comprises a turntable 5 disposed in the cavity, a plurality of tooth blocks 6 are equidistantly spaced on the lower surface of the turntable 5, a transmission gear 7 is disposed in the cavity and on the lower surface of the turntable 5, the transmission gear 7 is meshed with the tooth block 6, and is connected to an external driving member through the transmission gear 7, and as the transmission gear 7 rotates, the transmission gear 7 meshes with the tooth block 6, and drives the turntable 5 to rotate. A spiral guide plate 8 is provided on the upper surface of the turntable 5, and a slide groove 9 is formed between the guide plates 8. A plurality of sliders 10 are equidistantly provided on the lower surfaces of the three movable support blocks 2, and the sliders 10 extend into the slide groove 9. After the turntable 5 rotates, the guide plate 8 rotates accordingly. Since the guide plate 8 is a spiral axis, after its rotation, the slider 10 can slide in the slide groove 9, thereby driving the movable support block 2 to move forward and backward, and the three movable support blocks 2 move synchronously. When the polytetrafluoroethylene sealing ring is full, it can stop, so that the staff can install the polytetrafluoroethylene sealing ring.

[0021] When in use, first, according to the size of the polytetrafluoroethylene sealing ring to be installed, the polytetrafluoroethylene sealing ring is selected to be sleeved in the groove 4 opened on the outer side of the arc of the specific protrusion 3, and then the transmission gear 7 is connected to the external power device to rotate the transmission gear 7, and the transmission gear 7 is meshed with the tooth block 6 to drive the turntable 5 to rotate. As the turntable 5 rotates, the spiral guide plate 8 keeps rotating, which will drive the slider 10 to slide one by one in the slide groove 9, realizing the movement of the three movable support blocks 2, and the three movable support blocks 2 move synchronously, expanding the polytetrafluoroethylene sealing ring to be installed, making it full, thereby facilitating its installation.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention.

Claims

1. A polytetrafluoroethylene sealing ring installation auxiliary fixture, characterized in that: The invention comprises a base (1), an expansion assembly and a power unit, wherein the expansion assembly comprises three movable support blocks (2) arranged on the base (1), a positioning area for expanding a polytetrafluoroethylene sealing ring is formed between the three movable support blocks (2), and the three movable support blocks (2) are synchronously moved by the power unit to change the size of the positioning area.

2. The auxiliary fixture for installing a polytetrafluoroethylene sealing ring according to claim 1, characterized in that: The three movable support blocks (2) sequentially extend outwards to form two protrusions (3) with gradually decreasing heights, and the outer side of each protrusion (3) is arc-shaped.

3. The auxiliary fixture for installing a polytetrafluoroethylene sealing ring according to claim 2, characterized in that: The arc-shaped outer side of the protrusion (3) is provided with a groove (4) from the outside to the inside for accommodating a polytetrafluoroethylene sealing ring.

4. The auxiliary fixture for installing a polytetrafluoroethylene sealing ring according to claim 1, characterized in that: A cavity is provided in the base (1), and the power unit comprises a rotating disk (5) arranged in the cavity, wherein a plurality of tooth blocks (6) are arranged at equal intervals on the lower surface of the rotating disk (5).

5. The auxiliary fixture for installing a polytetrafluoroethylene sealing ring according to claim 4, characterized in that: A transmission gear (7) is provided in the cavity and on the lower surface of the rotating disk (5), and the transmission gear (7) is meshed with the gear block (6).

6. The auxiliary fixture for installing a polytetrafluoroethylene sealing ring according to claim 5, characterized in that: The upper surface of the rotating disk (5) is provided with a spiral guide plate (8), and a slide groove (9) is formed between the guide plates (8).

7. The auxiliary fixture for installing a polytetrafluoroethylene sealing ring according to claim 6, characterized in that: A plurality of sliding blocks (10) are equidistantly arranged on the lower surfaces of the three movable support blocks (2), and the sliding blocks (10) extend into the sliding grooves (9).

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