A polytetrafluoroethylene packing tear strength experiment display device and a method of using the same

Abstract

The application discloses a kind of polytetrafluoroethylene packing tear strength experiment display device and its using method, including bottom plate, the upper surface of the bottom plate is provided with the selection transmission mechanism that can adjust power output end position, the power output end of the selection transmission mechanism is provided with the experimental mechanism that can simulate the use environment of polytetrafluoroethylene packing;The selection transmission mechanism includes rotatable transmission rod, the surface power output end of the transmission rod is symmetrically provided with polygonal bar that can reciprocate along the direction of transmission rod, and the polygonal bar transmission end is provided with driving gear;The experimental mechanism includes the placement warehouse that can rotate and place polytetrafluoroethylene packing, and the mutual cooperation of observation frame and observation mirror on the surface of the whole placement warehouse, so that the experimenter is more intuitive to observe the state of polytetrafluoroethylene packing when using, and the internal pressure is directly displayed by pressure sensor during experiment, so as to have an intuitive judgment on sealing property.

Description

Technical Field

[0001] The invention relates to a polytetrafluoroethylene packing tearing strength experimental display device and a use method thereof. Background Art

[0002] Expanded PTFE packing is a packing product made of PTFE yarns containing graphite particles. Compared with similar packings, it has stronger tearing strength and higher thermal conductivity. Its extremely low friction coefficient makes it stable and has a long service life.

[0003] Since the packing is usually a strip woven from relatively soft threads, the cross-sectional area of ​​the packing is usually square, rectangular or circular. The packing is filled in the sealing cavity to achieve sealing.

[0004] When producing new PTFE packing, tear strength and sealing tests are usually carried out before mass production or when it is sold.

[0005] However, many existing tear strength test devices usually only use a hydraulic press or other expansion device to pull the PTFE packing after fixing its two ends to determine its strength. However, this test method cannot well simulate the state of the PTFE packing being torn during use. The test data is not accurate enough. In addition, it only has a single tearing data, and it is impossible to know whether the sealing performance has changed during the tearing. Therefore, there is an urgent need for an experimental device that can simulate the use environment of PTFE packing and tear it, and can intuitively reflect its sealing performance after tearing. Summary of the Invention

[0006] The purpose of the present invention is to provide a polytetrafluoroethylene packing tear strength experimental demonstration device and a method of using the same to solve the problems raised in the above background technology.

[0007] To solve the above technical problems, the present invention provides the following technical solution: comprising a base plate, the upper surface of which is provided with a selection transmission mechanism capable of adjusting the position of a power output end, and the power output end of the selection transmission mechanism is provided with an experimental mechanism capable of simulating the use environment of polytetrafluoroethylene packing;

[0008] The selective transmission mechanism includes a rotatable transmission rod, a polygonal rod that can reciprocate along the direction of the transmission rod is symmetrically arranged on the power output end of the transmission rod surface, and a driving gear is arranged on the transmission end of the polygonal rod;

[0009] The experimental mechanism includes a polytetrafluoroethylene packing placed in a rotatable placing bin, a rotatable fine experimental tube is arranged in the placing bin, an observation frame is arranged on the placing bin, a coarse experimental tube is arranged on one side of the placing bin, a one-way valve or a pressure sensor is arranged on the coarse experimental tube and the fine experimental tube, and the number of the one-way valve and the pressure sensor is one.

[0010] Preferably, a motor is arranged on the upper surface of the bottom plate, a transmission bin is arranged on the power output end of the motor, and the transmission rod is arranged on the transmission bin.

[0011] Preferably, a transmission wheel is arranged in the transmission bin, the transmission wheel is arranged on the surface of the motor, a connecting wheel is arranged in the transmission bin, the connecting wheel is arranged on the transmission rod, and the transmission wheel and the connecting wheel are connected through a belt.

[0012] Preferably, limit bolts are symmetrically arranged on the surface of the transmission rod, and support rods are symmetrically arranged on the surface of the bottom plate, and the transmission rod is arranged on the support rods.

[0013] Preferably, driven gears are symmetrically arranged on the coarse experimental tube and the fine experimental tube, baffles are symmetrically arranged on the surface of the bottom plate, and rotating discs are arranged on the surface of the baffles.

[0014] Preferably, a sealing cover is arranged on the sealing end of the placing bin, and fixing holes are arranged on the sealing cover and the placing bin.

[0015] Preferably, sealing grooves are arranged on the coarse experimental tube and the fine experimental tube, and the one-way valve and the pressure sensor are arranged on the sealing plugs, respectively.

[0016] Preferably, the placing bin is transparent, and the inner surface of the placing bin and the surface of the fine experimental rod at the joint with the polytetrafluoroethylene packing are rough and uneven.

[0017] Preferably, an observation frame is arranged on the surface of the placing bin, and an observation mirror is arranged on the surface of the bottom plate.

[0018] Compared with the prior art, the beneficial effects of the present application are:

[0019] 1. The overall flexibility is high, the corresponding end can be driven by pulling the polygonal rod according to the actual situation, the pulling force of the polytetrafluoroethylene packing under different conditions can be simulated, and the experimental data is more accurate.

[0020] 2. The observation frame on the surface of the placing bin and the observation mirror are matched with each other, so that the user can more intuitively observe the state of the polytetrafluoroethylene packing during use, and the internal pressure during the experiment is intuitively displayed through the pressure sensor, so that the sealing performance can be intuitively judged. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the overall structure schematic diagram of the embodiment of the present application;

[0022] Figure 2 It is the internal structure schematic diagram of the transmission bin of the embodiment of the present application;

[0023] Figure 3 It is the internal structure schematic diagram of the placement bin of the embodiment of the present application;

[0024] Figure 4 It is the structure schematic diagram of the sealing groove of the embodiment of the present application;

[0025] Figure 5 It is the structure schematic diagram of the baffle of the embodiment of the present application.

[0026] In the figure: 1, bottom plate; 201, support rod; 202, motor; 203, transmission bin; 204, transmission wheel; 205, connecting wheel; 206, transmission rod; 207, polygonal rod; 208, driving gear; 3, baffle; 4, rotating disc; 5, limiting bolt; 601, support; 602, fine experimental rod; 603, coarse experimental rod; 604, driven gear; 605, placement bin; 606, sealing cover; 607, fixing hole; 608, observation frame; 609, sealing groove; 610, sealing plug; 611, pressure sensor; 612, check valve; 7, observation mirror. DETAILED DESCRIPTION

[0027] In order to solve the problems that the existing one cannot well simulate the specific use of polytetrafluoroethylene packing and cannot intuitively reflect the sealing performance, the present application provides a polytetrafluoroethylene packing tearing strength experimental display device and a use method thereof. The technical solutions in the present application will be clearly and completely described below in combination with the drawings in the present application. Obviously, the described application is only a part of the application in the present application, rather than the whole application. Based on the application in the present application, all other applications obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the present application.

[0028] A use method of a polytetrafluoroethylene packing tearing strength experimental display device, comprising the following steps:

[0029] Step A, installing check valve 612 and pressure sensor 611: according to the pre-designed experimental direction, selecting the coarse experimental rod 603 or the fine experimental rod 602 to rotate, when selecting the fine experimental rod 602 to rotate, installing the sealing plug 610 with the check valve 612 on the sealing groove 609, and installing the sealing plug 610 with the pressure sensor 611 on the sealing groove 609 of the coarse experimental rod 603, and vice versa;

[0030] Step B, Installing PTFE Packing: Remove the sealing cover 606 from the storage chamber 605 by tightening the bolts. Fill the gap between the storage chamber 605 and the thin test rod 602 with PTFE packing as required. After filling, insert the bolts into the fixing holes 607 to reclose the sealing cover 606 and the storage chamber 605.

[0031] Step C, Transmission: Adjust the polygonal rod 207 on the corresponding side according to the selected experimental object. After the polygonal rod 207 on the corresponding side is pulled out, the driving gear 208 and the driven gear 604 on its surface engage with each other. The driving gear 208 will then contact and be restrained by the rotating disk 4 on the baffle 3. At this time, tighten the limit bolt 5 to limit the position of one side of the polygonal rod 207 to complete the adjustment. The other side is locked by the bracket 601 on its surface to prevent it from rotating.

[0032] Step D, stamping: Connect a high-pressure water pipe to the one-way valve 612, and fill the thick test rod 603 and the thin test rod 602 with liquid until the pressure sensor 611 displays a specified value, then remove the water pipe;

[0033] Step E, experiment: Start the motor 202, which drives the transmission wheel 204 to rotate, thereby driving the connecting wheel 205 to rotate under the action of the belt, and then driving the transmission rod 206 on the surface of the rotating wheel to rotate, thereby driving the coarse test rod 603 or the thin test rod 602 to rotate under the action of meshing. Since the interior of the placement bin 605 and the surface where the thin test rod 602 meets the polytetrafluoroethylene packing are rough, and one is in a rotating state and the other is in a stopped state, the tearing force on the polytetrafluoroethylene packing during normal use is magnified. Through the dual magnification effect of the observation frame 608 and the observation mirror 7, the experimental situation can be more intuitively observed, and the sealing effect can be intuitively reflected through the value of the pressure sensor 611.

[0034] Example 1:

[0035] The driving gear 208 is meshed with the driven gear 604 on the surface of the thick test rod 603. A one-way valve 612 is installed on the thick test rod 603, and a pressure sensor 611 is installed on the thin test rod 602. Other experimental steps refer to the above steps.

[0036] The thick test rod 603 drives the placement bin 605 to rotate. Since the interior of the placement bin 605 and the surface where the thin test rod 602 meets the polytetrafluoroethylene packing are rough and uneven, the placement bin 605 mainly tears the polytetrafluoroethylene packing that adheres to the surface of the placement bin 605, and the thin test rod 602 amplifies the tearing effect under the action of its own friction.

[0037] Example 2:

[0038] The driving gear 208 is meshed with the driven gear 604 on the surface of the thin test rod 602. A one-way valve 612 is installed on the thin test rod 602, and a pressure sensor 611 is installed on the thick test rod 603. Other experimental steps refer to the above steps.

[0039] As the thin test rod 602 rotates, the inside of the placement chamber 605 and the interface between the thin test rod 602 and the PTFE packing are rough and uneven. Thus, the thin test rod 602 mainly tears the PTFE packing against the placement chamber 605, while the thick test rod 603 amplifies the tearing effect under the action of its own friction.

[0040] The polytetrafluoroethylene packing tearing strength experimental demonstration device and its use method of the present invention have the following advantages:

[0041] 1. The overall flexibility of use is high. According to the actual situation, the corresponding end can be driven by pulling the polygonal rod 207. This can simulate the pulling force of the polytetrafluoroethylene packing under different conditions, and the experimental data is more accurate.

[0042] 2. The observation frame 608 and the observation mirror 7 on the surface of the storage chamber 605 cooperate with each other to allow the experimenter to more intuitively observe the status of the polytetrafluoroethylene packing during use, and the pressure sensor 611 intuitively displays the internal pressure during the experiment, so as to have an intuitive judgment on the sealing performance.

[0043] While the invention has been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A polytetrafluoroethylene packing tear strength test demonstration device, characterized by: It comprises a bottom plate (1), the upper surface of the bottom plate (1) is provided with a selection transmission mechanism capable of adjusting the position of a power output end, and the power output end of the selection transmission mechanism is provided with an experimental mechanism capable of simulating the use environment of polytetrafluoroethylene packing; The selective transmission mechanism comprises a rotatable transmission rod (206), a polygonal rod (207) capable of reciprocating along the direction of the transmission rod (206) being symmetrically arranged at the power output end of the surface of the transmission rod (206), and a driving gear (208) being arranged at the transmission end of the polygonal rod (207); The experimental mechanism comprises a rotatable placement chamber (605) for placing polytetrafluoroethylene packing, a rotatable thin experimental tube being arranged in the placement chamber (605), an observation frame (608) being arranged on the placement chamber (605), a thick experimental tube being arranged on one side of the placement chamber (605), and a one-way valve (612) or a pressure sensor (611) being arranged on each of the thick experimental tube and the thin experimental tube, and the number of the one-way valve (612) and the number of the pressure sensor (611) are both one; A motor (202) is provided on the upper surface of the bottom plate (1); a transmission compartment (203) is provided at the power output end of the motor (202); and the transmission rod (206) is provided on the transmission compartment (203); A transmission wheel (204) is provided inside the transmission chamber (203), and the transmission wheel (204) is provided on the surface of the motor (202). A connecting wheel (205) is provided inside the transmission chamber (203), and the connecting wheel (205) is provided on the transmission rod (206). The transmission wheel (204) and the connecting wheel (205) are connected via a belt. The transmission rod (206) is symmetrically provided with a limit bolt (5) on its surface, the base plate (1) is symmetrically provided with a support rod (201) on its surface, and the transmission rod (206) is provided on the support rod (201); Driven gears (604) are symmetrically provided on the thick experimental tube and the thin experimental tube, baffles (3) are symmetrically provided on the surface of the bottom plate (1), and a rotating disk (4) is provided on the surface of the baffle (3); The sealing end of the placement bin (605) is provided with a sealing cover (606), and both the sealing cover (606) and the placement bin (605) are provided with fixing holes (607); The thick experimental tube and the thin experimental tube are both provided with a sealing groove (609), and the one-way valve (612) and the pressure sensor (611) are respectively provided on the sealing plug (610).

2. A polytetrafluoroethylene packing tearing strength test and demonstration device according to claim 1, characterized in that: The placement chamber (605) is transparent, and the interior thereof and the surface where the thin test rod (602) and the polytetrafluoroethylene packing meet are rough and uneven.

3. The polytetrafluoroethylene packing tearing strength test and demonstration device according to claim 1, characterized in that: An observation frame (608) is provided on the surface of the placement bin (605), and an observation mirror (7) is provided on the surface of the bottom plate (1).

4. A method for using the polytetrafluoroethylene packing tearing strength test and demonstration device according to any one of claims 1 to 3, characterized in that: The following steps are involved: Step (A), installing the one-way valve (612) and the pressure sensor (611): according to the pre-designed experimental direction, choose whether to rotate the thick experimental rod (603) or the thin experimental rod (602). When the thin experimental rod (602) is selected for rotation, after installing the sealing plug (610) with the one-way valve (612) on the sealing groove (609), install the sealing plug (610) with the pressure sensor (611) on the sealing groove (609) of the thick experimental rod (603). Otherwise, the reverse operation can be performed; Step (B), installing polytetrafluoroethylene packing: remove the sealing cover (606) from the placement chamber (605) by tightening the bolts, fill the polytetrafluoroethylene packing into the gap between the placement chamber (605) and the thin test rod (602) as required, and after filling, reclose the sealing cover (606) and the placement chamber (605) by inserting the bolts into the fixing holes (607); Step (C), transmission: according to the selected experimental object, adjust the polygonal rod (207) on the corresponding side, and after the polygonal rod (207) on the corresponding side is pulled out, the driving gear (208) and the driven gear (604) on the surface thereof are meshed with each other, so that the driving gear (208) contacts and is restricted by the rotating disk (4) on the baffle (3). At this time, the limiting bolt (5) is screwed to limit one side of the polygonal rod (207), and the adjustment is completed, while the other side is locked by the bracket (601) on its surface to prevent it from rotating; Step (D), stamping: connect a high-pressure water pipe to the one-way valve (612), fill the thick test rod (603) and the thin test rod (602) with liquid, and remove the water pipe after the pressure sensor (611) displays a specified value; Step (E), experiment: start the motor (202), the motor (202) drives the transmission wheel (204) to rotate, thereby driving the connecting wheel (205) to rotate under the action of the belt, and then driving the transmission rod (206) on the surface of the rotating wheel to rotate, thereby driving the thick test rod (603) or the thin test rod (602) to rotate under the action of meshing. Since the interior of the placement chamber (605) and the surface where the thin test rod (602) and the polytetrafluoroethylene packing meet are rough and uneven, and one is in a rotating state and the other is in a stopped state, the tearing force on the polytetrafluoroethylene packing during normal use is magnified. Through the dual magnification effect of the observation frame (608) and the observation mirror (7), the experimental situation can be more intuitively observed, and the sealing effect can be intuitively reflected through the value of the pressure sensor (611).

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