Tensile strength testing device for PTFE needled felt finished product

Abstract

The utility model discloses a tensile strength testing device for a PTFE (Polytetrafluoroethylene) needled felt finished product, and relates to the technical field of PTFE needled felt quality inspection, the middle part of a frame of a support frame is provided with two groups of opposite position correcting mechanisms for pushing a guide sliding table, and a sensing output end of a tension sensor is provided with a tool clamp; two sets of tensioning rollers are arranged between the two sets of sliding tables of the tensioning mechanism in an opposite staggered mode. According to the design, tooth row type butt-clamping positioning is carried out on the needled felt based on the two sets of opposite tool clamps, the needled felt is completely clamped and positioned, the tension stress of the needled felt is more uniform, then the opposite-direction correcting mechanism is used for driving the tool clamps to move in the opposite direction, the needled felt between the tool clamps is oppositely pulled, and the tension strength of the needled felt is oppositely detected; and the two groups of tensioning rollers can be driven by the tensioning mechanism to move oppositely, so that the needled felt is subjected to staggered tensioning in a front and back form, the needled felt is tensioned again, and then the tensile strength of the needled felt is detected again.

Description

Technical Field

[0001] This utility model relates to the field of PTFE needle-punched felt quality inspection, and in particular to a device for testing the tensile strength of PTFE needle-punched felt finished products. Background Technology

[0002] PTFE needle-punched felt has a wide range of applications, mainly in industrial dust removal, high-temperature environments, and ultra-clean emissions. In addition, PTFE needle-punched felt can also be used to manufacture cooling systems for electronic equipment, dust particle filter materials for chemical plants, and corrosion-resistant metal parts. After the finished PTFE needle-punched felt is produced, its tensile strength is usually tested using appropriate testing equipment to ensure its qualified tensile performance. For example, a strength testing device for PTFE needle-punched felt (publication number CN218239614U) disclosed on the China Patent Network shows that when this type of device is used, the PTFE needle-punched felt fabric is clamped by four tensile testing devices. Because the threads on the first lead screw that are threaded to the moving block are in opposite directions, the two mounting shells can move in opposite directions. The tensile testing devices can simultaneously test the tensile force, record the value, and transmit it to a computer to complete the tensile strength test.

[0003] However, the aforementioned patented and existing PTFE needle-punched felt strength testing equipment still has some shortcomings: the existing method of using fixed-point clamping of needle-punched felt for tensile strength testing is relatively singular and limited in terms of the stress point for tensile strength testing, resulting in uneven stress distribution and insufficient accuracy in testing the tensile strength of needle-punched felt. Therefore, those skilled in the art have provided a PTFE needle-punched felt finished product tensile strength testing device to solve the problems mentioned in the background art. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a PTFE needle-punched felt tensile strength testing device, which solves the problems of uneven force distribution and insufficient accuracy in existing needle-punched felt tensile strength testing devices mentioned in the background art.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a PTFE needle-punched felt finished product tensile strength testing device, including a support frame;

[0006] The support frame has guide rails arranged symmetrically on both sides, and guide slides are slidably connected between the two sets of guide rails. The support frame has two sets of opposing alignment mechanisms that push the guide slides in the middle.

[0007] A tension sensor is installed on the upper end of the guide slide frame, and a tooling fixture is installed on the sensing output end of the tension sensor.

[0008] The support frame is equipped with a tensioning mechanism at its upper end, and two sets of tensioning rollers are arranged in a staggered manner between the two sets of slides of the tensioning mechanism.

[0009] As a further technical solution of this utility model: the tensioning mechanism includes side supports symmetrically arranged in the middle of the support frame, a transmission gear is rotatably connected to the middle of the support of the side supports, and lifting slide rails are symmetrically arranged on both sides of the support of the side supports, corresponding to the two sides of the transmission gear. The guide rails of the two sets of lifting slide rails are slidably connected to the lifting slide table connected to the tensioning roller in an alternating manner, and a lifting rack that meshes with the transmission gear is provided on one side of the frame of the two sets of lifting slide tables.

[0010] As a further technical solution of this utility model: a first electric push rod for driving the lifting slide is provided on one side of the base frame of the side support frame.

[0011] As a further technical solution of this utility model: the opposing alignment mechanism includes a transmission screw rotatably connected to the middle of the support frame. The outer side of the shaft of the transmission screw is symmetrically fitted with a transmission sleeve, and the two sides of the shaft of the transmission sleeve are symmetrically provided with telescopic winches. The top of the winch of each set of telescopic winches is connected to an arm force push rod connected to the guide slide.

[0012] As a further technical solution of this utility model: a transmission motor is installed in the middle of the support frame directly below the transmission screw, a pulley A is provided at the output end of the transmission motor, a pulley B is installed at one end of the shaft of the transmission screw, and pulley A and pulley B are connected by a transmission belt.

[0013] As a further technical solution of this utility model: the transmission screw is divided by the center line, and the two sides of the center line are symmetrically provided with positive and negative threads that are adapted to the two sets of transmission screw sleeves.

[0014] As a further technical solution of this utility model: the tooling fixture includes a tooling frame installed on the sensing output end of the tension sensor. A locking toothed row is installed in the middle of the support of the tooling frame, and a second electric push rod is installed symmetrically on both sides of the support of the tooling frame. The telescopic end of the second electric push rod is provided with a support seat, and the top of the support seat is provided with a downward pressing toothed row that is offset from the teeth of the locking toothed row.

[0015] This invention provides a device for testing the tensile strength of PTFE needle-punched felt, which has the following advantages compared with the prior art:

[0016] This PTFE needle-punched felt tensile strength testing device is based on two sets of opposing tooling fixtures for toothed clamping and positioning of the needle-punched felt, ensuring a more uniform tensile force distribution. Then, a counter-alignment mechanism drives the opposing displacement of the tooling fixtures, pulling the needle-punched felt between the fixtures to test its tensile strength. Alternatively, a tensioning mechanism can drive the opposing displacement of two sets of tensioning rollers to perform staggered tensioning of the needle-punched felt on both sides, allowing for further tensioning and subsequent re-testing of its tensile strength. This device offers both uniform and stable stress distribution for testing and multiple testing capabilities, enabling edge and center tensile strength testing of the needle-punched felt for greater accuracy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a device for testing the tensile strength of PTFE needle-punched felt.

[0018] Figure 2 This is a schematic diagram of the opposing alignment mechanism in a PTFE needle-punched felt tensile strength testing device.

[0019] Figure 3 This is a schematic diagram of the tensioning mechanism in a PTFE needle-punched felt tensile strength testing device.

[0020] Figure 4 This is a schematic diagram of the tooling fixture in a PTFE needle-punched felt tensile strength testing device.

[0021] In the diagram: 1. Support frame; 2. Guide slide; 3. Tension sensor; 4. Tooling fixture; 41. Tooling frame; 42. Locking gear rack; 43. Downward pressing gear rack; 44. Second electric push rod; 45. Support base; 5. Side support frame; 6. First electric push rod; 7. Tensioning roller; 8. Lifting slide rail; 9. Lifting slide; 10. Lifting rack; 11. Transmission gear; 12. Transmission screw; 13. Transmission sleeve; 14. Telescopic winch; 15. Arm force push rod; 16. Guide slide rail; 17. Transmission motor; 18. Pulley A; 19. Pulley B; 20. Transmission belt. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4This utility model provides a technical solution for a PTFE needle-punched felt tensile strength testing device: A PTFE needle-punched felt tensile strength testing device includes a support frame 1. Guide rails 16 are symmetrically arranged on both sides of the frame of the support frame 1, and guide slides 2 are slidably connected between the two opposing sets of guide rails 16. Two opposing alignment mechanisms for pushing the guide slides 2 are arranged in the middle of the frame of the support frame 1. The opposing alignment mechanism includes a transmission screw 12 rotatably connected to the middle of the frame of the support frame 1. The middle of the frame of the support frame 1 faces... A drive motor 17 is installed below the drive screw 12. A pulley A18 is provided at the output end of the drive motor 17. A pulley B19 is installed at one end of the shaft of the drive screw 12. The pulleys A18 and B19 are connected by a drive belt 20. By controlling the operation of the drive motor 17, the pulley A18 is driven to rotate. The drive belt 20 drives the pulley B19 to rotate, which in turn drives the drive screw 12 to rotate. As a power source, the corresponding components are driven to operate in linkage to tension the PTFE needle-punched felt.

[0024] The transmission screw 12 has a transmission sleeve 13 symmetrically fitted on the outer side of its shaft. The transmission sleeve 13 has telescopic winches 14 symmetrically arranged on both sides of its shaft. The top of the winch of each telescopic winch 14 is connected to an arm force push rod 15 connected to the guide slide 2. The transmission screw 12 has positive and negative threads symmetrically arranged on both sides of its center line to match the two sets of transmission sleeves 13. When the transmission screw 12 rotates, it uses its positive and negative threads to push the two sets of transmission sleeves 13 to slide symmetrically along the shaft direction of the transmission screw 12. At the same time, the telescopic winch 14 and the arm force transmission of the arm force push rod 15 push the guide slide rail 16 of the guide slide 2 to slide, which pulls the PTFE needle-punched felt in the tooling fixture 4. The tensile strength is tested by the tensile sensor 3.

[0025] A tension sensor 3 is installed on the upper end of the guide slide 2, and a tooling fixture 4 is installed on the sensing output end of the tension sensor 3. The tooling fixture 4 includes a tooling frame 41 installed on the sensing output end of the tension sensor 3. A locking toothed rack 42 is installed in the middle of the support of the tooling frame 41, and a second electric push rod 44 is symmetrically installed on both sides of the support of the tooling frame 41. A support seat 45 is provided at the telescopic end of the second electric push rod 44, and a downward pressing toothed rack 43 with teeth offset from the locking toothed rack 42 is provided at the top of the support seat 45. By placing the two ends of the PTFE needle-punched felt product to be tested between the two sets of horizontal tooling fixtures 4, and then controlling the telescopic braking of the second electric push rod 44, the downward pressing toothed rack 43 is driven to move down. By using the offset pressing of the downward pressing toothed rack 43 and the locking toothed rack 42, the PTFE needle-punched felt is uniformly pressed and positioned, so that the PTFE needle-punched felt is kept under uniform force for tensile testing.

[0026] A tensioning mechanism is installed on the upper end of the frame of the support frame 1. Two sets of tensioning rollers 7 are arranged oppositely and staggered between the two sets of slides of the tensioning mechanism. The tensioning mechanism includes side supports 5 symmetrically arranged in the middle of the frame of the support frame 1. A transmission gear 11 is rotatably connected to the middle of the support of the side supports 5. Lifting slide rails 8 are symmetrically arranged on both sides of the support of the side supports 5, facing the two sides of the transmission gear 11. The guide rails of the two sets of lifting slide rails 8 are slidably connected to the lifting slides 9 connected to the tensioning rollers 7 in an alternating manner. Lifting teeth that mesh with the transmission gear 11 are provided on one side of the frame of each set of lifting slides 9. A first electric push rod 6 is provided on one side of the base frame of the side support frame 5 to drive the lifting slide 9 to slide. By controlling the extension and braking of the first electric push rod 6, the lifting slide 9 is pushed to slide along the guide rail direction of the lifting slide rail 8. While one set of lifting slides 9 is sliding, the lifting rack 10 and the transmission gear 11 are linked together to push the opposite lifting slide 9 to slide up and down in the opposite direction. This drives the two sets of tensioning rollers 7 to move in an alternating opposite direction, and to perform staggered tensioning of the central part of the PTFE needle-punched felt. The tensile strength of the PTFE needle-punched felt is tested by tensioning it.

[0027] The working principle of this utility model is as follows: When testing the tensile strength of PTFE needle-punched felt, the two ends of the PTFE needle-punched felt to be tested are placed between two sets of horizontal tooling fixtures 4. Then, the second electric push rod 44 is controlled to extend and retract, driving the lower pressure tooth row 43 to move down. By using the misalignment of the lower pressure tooth row 43 and the locking tooth row 42, the PTFE needle-punched felt is uniformly and comprehensively pressed and positioned.

[0028] After the PTFE needle-punched felt is further fixed, the drive motor 17 is controlled to work, driving the combination of pulley A18, drive belt 20, and pulley B19 to rotate, which in turn drives the drive screw 12 to rotate. Using its positive and negative threads, it pushes the two sets of opposite drive sleeves 13 to slide symmetrically along the axis of the drive screw 12. At the same time, the telescopic winch 14 and the arm force transmission of the arm force push rod 15 are used to push the guide slide 2 guide rail 16 to slide, pulling the PTFE needle-punched felt in the tooling fixture 4. The tensile strength is detected by the tensile force sensor 3.

[0029] Furthermore, the first electric push rod 6 is controlled to extend and retract, pushing the lifting slide 9 to slide along the guide rail of the lifting slide rail 8. While one set of lifting slides 9 is sliding, the lifting rack 10 and the transmission gear 11 are linked together to push the opposite lifting slide 9 to slide in the opposite direction. This causes the two sets of tensioning rollers 7 to move in an alternating opposite direction, thus performing staggered tensioning of the central part of the PTFE needle-punched felt. Through the tensioning of the PTFE needle-punched felt, its tensile strength is tested again.

[0030] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A device for testing the tensile strength of PTFE needle-punched felt, characterized in that, Includes support frame (1); The support frame (1) has guide rails (16) arranged symmetrically on both sides of the frame, and guide slides (2) are slidably connected between the two sets of guide rails (16). Two opposing alignment mechanisms for pushing the guide slides (2) are provided in the middle of the frame of the support frame (1). A tension sensor (3) is installed on the upper end of the frame of the guide slide (2), and a tooling fixture (4) is installed on the sensing output end of the tension sensor (3). The support frame (1) is equipped with a tensioning mechanism at the upper end of the frame, and two sets of tensioning rollers (7) are arranged in opposite directions between the two sets of slides of the tensioning mechanism.

2. The PTFE needle-punched felt tensile strength testing device according to claim 1, characterized in that, The tensioning mechanism includes side support frames (5) arranged symmetrically in the middle of the support frame (1). A transmission gear (11) is rotatably connected to the middle of the support frame (5). Lifting slide rails (8) are arranged symmetrically on both sides of the support frame (5) and are directly opposite to the two sides of the transmission gear (11). The guide rails of the two sets of lifting slide rails (8) are slidably connected to the lifting slide table (9) connected to the tensioning roller (7). Lifting racks (10) that mesh with the transmission gear (11) are provided on one side of the frame of the two sets of lifting slide tables (9).

3. The PTFE needle-punched felt tensile strength testing device according to claim 2, characterized in that, The side support frame (5) is provided with a first electric push rod (6) on one side of the base frame to drive the lifting slide (9) to slide.

4. The PTFE needle-punched felt tensile strength testing device according to claim 1, characterized in that, The opposing alignment mechanism includes a transmission screw (12) rotatably connected to the middle of the support frame (1). The outer side of the shaft of the transmission screw (12) is symmetrically fitted with a transmission sleeve (13), and the two sides of the shaft of the transmission sleeve (13) are symmetrically provided with telescopic winches (14). The top of the winch of each set of telescopic winches (14) is connected to an arm force push rod (15) connected to the guide slide (2).

5. The PTFE needle-punched felt tensile strength testing device according to claim 4, characterized in that, A drive motor (17) is installed in the middle of the support frame (1) directly below the drive screw (12). The output end of the drive motor (17) is provided with a pulley A (18). A pulley B (19) is installed at one end of the shaft of the drive screw (12). The pulley A (18) and the pulley B (19) are connected by a drive belt (20).

6. The PTFE needle-punched felt tensile strength testing device according to claim 4, characterized in that, The transmission screw (12) is divided by a center line, and the two sides of the center line are symmetrically provided with positive and negative threads that are compatible with the two sets of transmission screw sleeves (13).

7. The PTFE needle-punched felt tensile strength testing device according to claim 1, characterized in that, The tooling fixture (4) includes a tooling frame (41) installed at the sensing output end of the tension sensor (3). A locking toothed rack (42) is installed in the middle of the support of the tooling frame (41), and a second electric push rod (44) is installed symmetrically on both sides of the support of the tooling frame (41). A support seat (45) is provided at the telescopic end of the second electric push rod (44), and a downward pressing toothed rack (43) that is offset from the teeth of the locking toothed rack (42) is provided at the top of the support seat (45).

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