CN113933196B - Testing device for sealing element - Google Patents

Abstract

The embodiment of the application belongs to the technical field of test equipment, concretely relates to testing arrangement of sealing member, and when it aims at solving sealing member capability test among the correlation technique, the sealing member can make the indentation shallow because of self elasticity, leads to the not enough problem of accuracy that detects. The testing device for the sealing element comprises a base, a fixed seat and a loading seat, wherein the fixed seat and the loading seat are arranged on the base; the fixed seat is used for fixing the sealing element; the loading seat is provided with a driving device, the driving end of the driving device is provided with a test pressure head, and the driving device is used for driving the test pressure head to reciprocate towards the fixed seat so that the test pressure head extrudes the sealing element; and a displacement detection device is arranged between the fixed seat and the loading seat and is used for detecting the depth of the test pressure head pressed into the sealing element. The displacement detection device realizes the online detection of the indentation depth when the sealing element is loaded, avoids the influence on the indentation detection caused by the elastic recovery of the sealing element, and further improves the accuracy of the sealing element test.

Description

Testing device for sealing element

Technical Field

The embodiment of the application belongs to the technical field of test equipment, and particularly relates to a test device for a sealing element.

Background

The tightness of the valve is a heavy index for measuring the performance of the valve, and in the process of realizing repeated opening and closing of the valve, a sealing element can cause stress relaxation due to fatigue, so that the sealing performance is influenced. Such as: the valve body of the one-way valve is provided with a sealing element which is in sealing fit with the valve core, so that the one-way valve is closed when the valve core is contacted with the sealing element; in order to ensure the service life and the sealing effect of the sealing element, the sealing element is generally required to be tested

Among the correlation technique, testing arrangement through the sealing member often tests it, and testing arrangement includes pressure head and fixing base, and sealing member detachable sets up on the fixing base, and the pressure head is the same with the structure of case, is close to the fixing base through making the pressure head to make its extrusion sealing member, simulate the atress condition of sealing member in the valve body. The seal was then removed from the holder and the performance of the seal was evaluated by the indentation of the indenter on the seal.

However, the sealing member generally has a certain elasticity, and after the indenter is pressed to generate the indentation, the indentation becomes shallow due to the elasticity of the sealing member, which results in insufficient detection accuracy.

Disclosure of Invention

The embodiment of the application provides a testing arrangement of sealing member for when solving sealing member capability test, the sealing member can make the indentation shallowing because of self elasticity, leads to the not enough problem of accuracy that detects.

In order to achieve the above object, the detection device provided in the embodiment of the present application includes a base, a fixing seat and a loading seat, where the fixing seat and the loading seat are disposed on the base; the fixed seat is used for fixing a sealing element; the loading seat is provided with a driving device, a testing pressure head is arranged at the driving end of the driving device, and the driving device is used for driving the testing pressure head to reciprocate towards the fixed seat so as to enable the testing pressure head to extrude the sealing element; and a displacement detection device is arranged between the fixed seat and the loading seat and is used for detecting the pressing depth of the test pressure head into the sealing element.

Further, displacement detection device is including surveying test panel and distance detection device, survey the test panel setting and be in survey on the pressure test head, distance detection device sets up on the fixing base, distance detection device is used for detecting survey test panel and its distance between.

Further, the distance detection device comprises a laser transmitter and a laser receiver which are arranged on the fixing seat, the laser transmitter is used for transmitting laser to the test board, and the laser receiver is used for receiving reflected laser from the test board.

Further, be provided with pressure measurement on the fixing base, pressure measurement with the sealing member is connected, is used for detecting the pressure that the sealing member received.

Further, be provided with the mounting hole on the fixing base, wear to be equipped with fixed pipe in the mounting hole, fixed pipe orientation the one end of loading seat be used for with the sealing member is connected, fixed pipe deviates from the one end of loading seat with pressure measurement connects.

Furthermore, a sliding channel is arranged on the loading seat, a sliding column is arranged in the sliding channel in a sliding mode, one end, facing the fixed seat, of the sliding column is connected with the test pressure head, and one end, facing away from the fixed seat, of the sliding column is connected with the driving device; and a rolling body is arranged between the sliding channel and the sliding column.

Further, the slip post is including the orientation the first section of fixing base and keeping away from the second section of fixing base, the diameter of first section is less than the diameter of second section, the cover is equipped with reset spring on the first section, reset spring is used for the drive the slip post to drive arrangement removes.

Further, a first moving seat is arranged between the loading seat and the base, the first moving seat comprises a first seat body connected with the base and a second seat body connected with the loading seat, a first torsion rod is arranged on the first seat body, a first adjusting mechanism is arranged between the first seat body and the second seat body, the first torsion rod is in transmission connection with the first adjusting mechanism, the first adjusting mechanism is used for driving the second seat body to rotate relative to the first seat body, and the rotation axis of the second seat body is perpendicular to the central line of the driving device.

Further, first removal seat with be provided with the second between the base and remove the seat, the second remove the seat on be provided with the second torsion bar and with second torsion bar transmission connection second adjustment mechanism, second adjustment mechanism with first removal seat is connected, second adjustment mechanism is used for the drive first removal seat is along being on a parallel with drive arrangement's central line direction removes.

Furthermore, the top of the base is provided with an installation inclined plane, the fixed seat and the loading seat are both arranged on the installation inclined plane, and the installation inclined plane is obliquely arranged relative to the horizontal plane;

the bottom of the base is provided with an assembly groove, and the assembly groove is used for being matched with a scanning electron microscope objective table.

The beneficial effects of the embodiment of the application are that: the testing device for the sealing element comprises a base, a fixed seat and a loading seat, wherein the fixed seat and the loading seat are arranged on the base; the fixed seat is used for fixing the sealing element; the loading seat is provided with a driving device, the driving end of the driving device is provided with a test pressure head, and the driving device is used for driving the test pressure head to reciprocate towards the fixed seat so that the test pressure head extrudes the sealing element; and a displacement detection device is arranged between the fixed seat and the loading seat and is used for detecting the depth of the test pressure head pressed into the sealing element. After the test pressure head is pressed into the sealing element, the online detection of the indentation depth is realized through the displacement detection device when the sealing element is loaded, the influence on the indentation detection caused by the elastic recovery of the sealing element is avoided, and the accuracy of the test on the sealing element is further improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

FIG. 1 is a schematic view of a check valve;

FIG. 2 is an isometric view of a test setup for a seal provided in an embodiment of the present application;

FIG. 3 is a front view of a seal testing apparatus provided in accordance with an embodiment of the present application;

FIG. 4 is a partial cross-sectional view of a load seat in a seal testing apparatus according to an embodiment of the present application;

FIG. 5 is a partial cross-sectional view of a mounting block of a seal testing apparatus according to an embodiment of the present disclosure;

FIG. 6 is an isometric view of a first movable seat of a test rig for seals provided in embodiments of the present application;

FIG. 7 is a partial cross-sectional view of a first movable seat of a seal testing apparatus according to an embodiment of the present application;

fig. 8 is a schematic structural view of a first seat provided with a first worm in a testing device of a sealing element according to an embodiment of the present disclosure;

fig. 9 is a schematic structural view of a second seat body provided with a first rack in the testing device for a sealing element according to the embodiment of the present application;

FIG. 10 is an isometric view of a second movable seat of a seal testing apparatus provided in accordance with an embodiment of the present application;

fig. 11 is a partial cross-sectional view of a second movable seat in a seal testing apparatus according to an embodiment of the present application.

Description of reference numerals:

10-a one-way valve;

110-a valve seat;

130 a valve core;

20-a base;

210-a mounting slot;

220-first mounting hole;

30-a fixed seat;

310-a seal;

311-connecting column;

320-mounting holes;

321-a mounting cavity;

322-a wiring trough;

330-fixed tube;

331-a connecting pin;

332-mounting flange;

340-a second end cap;

350-a first mount;

360-a stationary body;

370-a third mounting hole;

40-a loading seat;

410-a piezoelectric actuator;

411-a drive end;

420-a sliding channel;

421-rolling body;

430-sliding column;

431-first section;

432-a second segment;

440-test indenter;

450-a return spring;

460-a first end cap;

461-thickening portion;

470-fourth mounting hole;

50-displacement detection means;

510-a test board;

520-distance detection means;

530-mounting clips;

60-a pressure detection device;

610-connecting lines;

70-a first movable seat;

710-a first seat;

711-first drive slot;

712-a first slide rail;

713-rail;

714-a first groove;

715-a first screw;

716-a fifth mounting hole;

720-a second seat;

721-a first runner;

722-a dovetail groove;

723-block;

730-a first torsion bar;

741-a first worm;

742-a first rack;

80-a second movable seat;

810-a mobile station;

820-a second torsion bar;

830-a second adjustment mechanism;

840-a second slide rail;

850-base;

860-sixth mounting hole.

Specific embodiments of the present application have been shown by way of example in the drawings and will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

The valve seat seal in the valve belongs to dynamic seal, and the valve core is contacted with the sealing element when the valve is closed to form a sealing pair. When the valve core is in contact with the sealing element, the sealing element is pressed, and an indentation is formed on the contact surface of the sealing element, and the service life of the sealing element is influenced by the depth of the indentation.

Among the correlation technique, the testing arrangement who tests the sealing member includes test pressure head and fixing base, and sealing member detachable sets up on the fixing base, and the test pressure head is the same with the structure of case, and the drive test pressure head is close to the fixing base to make its extrusion sealing member, simulate the atress condition of sealing member in the valve body. As the sealing element can only be detached to measure the depth of the indentation in the related technology, the sealing element has elasticity, and the indentation can be shallow when the sealing element is detached, so that the detected depth of the indentation has larger error and insufficient accuracy.

In view of this, the testing arrangement of sealing member that this application embodiment provided includes the base, sets up fixing base and the loading seat on the base to be provided with displacement detection device between fixing base and loading seat, displacement detection device is used for detecting the degree of depth that the test indenter impressed the sealing member, in order to realize the measurement to the indentation degree of depth of sealing member, with dismantling the sealing member after the extrusion to detect the indentation of sealing member, improved indentation degree of depth measuring accuracy, reduced measuring error.

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts belong to the protection scope of the present application.

Fig. 1 is a schematic structural view of a check valve, fig. 2 is an isometric view of a testing device of a seal provided in an embodiment of the present application, fig. 3 is a front view of the testing device of the seal provided in the embodiment of the present application, fig. 4 is a partial sectional view of a loading seat in the testing device of the seal provided in the embodiment of the present application, fig. 5 is a partial sectional view of a fixed seat in the testing device of the seal provided in the embodiment of the present application, fig. 6 is an isometric view of a first movable seat in the testing device of the seal provided in the embodiment of the present application, fig. 7 is a partial sectional view of a first movable seat in the testing device of the seal provided in the embodiment of the present application, fig. 8 is a schematic structural view of a first seat body provided with a first worm in the testing device of the seal provided in the embodiment of the present application, fig. 9 is a schematic structural view of a second seat provided with a first rack in the testing device of the seal provided in the embodiment of the present application, fig. 10 is a schematic structural view of a second movable seat in the testing device of the seal provided in the embodiment of the present application, and fig. 11 is a partial sectional view of a second movable seat in the testing device of the seal provided in the embodiment of the present application.

Referring to fig. 2 and 3, the testing apparatus for a sealing member according to the embodiment of the present disclosure includes a base 20, a fixing seat 30 disposed on the base 20, and a loading seat 40.

As shown in fig. 2 and 3, in the present embodiment, the base 20 is used for fixing and supporting the fixed base 30 and the loading base 40, that is, the base 20 is disposed below the fixed base 30 and the loading base 40. For example, the base 20 may be a plate-shaped structure with high strength, and of course, the base 20 may also be a table with a table top, as long as the structure can support and fix the fixing base 30 and the loading base 40, and the embodiment of the present application is not limited.

Further, as shown in fig. 2, fig. 4 and fig. 5, a first mounting hole 220 and a second mounting hole may be disposed on the base 20, the fixing base 30 is disposed with a third mounting hole 370, a fourth mounting hole 470 is disposed on the loading base 40, the first mounting hole 220 is fixedly connected to the third bolt hole through a bolt, the second bolt hole is fixedly connected to the fourth bolt hole through a bolt, wherein the first mounting hole 220, the second mounting hole, the third mounting hole 370 and the fourth mounting hole 470 may be disposed in plural numbers so as to adjust the connection positions of the fixing base 30 and the loading base 40 on the base 20.

In other embodiments, the fixing base 30 and the loading base 40 may also be directly welded to the base 20, or the fixing base 30, the loading base 40, and the base 20 may also be formed as an integral structure by casting or injection molding.

With continued reference to fig. 1-3, the present embodiment provides a device for testing a sealing element 310 of a valve 10, where the valve 10 may be a one-way valve, the valve 10 includes a valve seat 110, a spring, a valve core 130, and a sealing element 310, the valve seat 110 has a valve cavity penetrating therethrough, the valve core 130 and the sealing element 310 are both disposed in the valve cavity, and the valve core 130 divides the valve cavity into a first valve cavity and a second valve cavity, a mounting boss is disposed between the first valve cavity and the second valve cavity, the sealing element 310 is generally annular, and the sealing element 310 is disposed on the mounting boss; the spring is connected with the valve seat 110 and the valve core 130 and is used for driving the valve core 130 to move towards the sealing element 310 so that the valve core 130 is matched with the sealing element 310, the first valve cavity and the second valve cavity are not communicated, and the valve is kept closed. With continued reference to fig. 1, when the pressure in the first valve chamber on the side away from the spring is greater than the pressure of the spring on the valve core, the valve core is separated from the sealing member 310 under the pressure of the fluid, so that the first valve chamber is communicated with the second valve chamber to open the valve. The material of the sealing member 310 may be rubber, plastic, or metal.

The fixing base 30 in this embodiment is used for fixing the sealing element 310, for example, an annular groove may be provided on the fixing base 30, and the sealing element 310 is clamped in the annular groove, although the sealing element 310 may also be connected with the fixing base 30 by adhesive, as long as the fixing of the sealing element 310 can be achieved.

It should be noted that, since the sealing member 310 has different structures or shapes in different valves, the sealing member 310 with the corresponding structure or shape needs to be installed on the fixing base 30 when testing different valves.

In some embodiments, as shown in fig. 2 and 4, the end of the sealing member 310 close to the fixing base 30 is provided with a connecting column 311 along the direction of the axis of the sealing member 310, and the sealing member 310 can be conveniently fixed through the connecting column 311. The diameter of the connection column 311 is smaller than that of the sealing member 310, and the connection column 311 and the sealing member 310 can be of an integrally formed structure, but of course, the connection column 311 and the sealing member 310 can also be of a split structure so as to facilitate replacement of the sealing member 310.

Further, as shown in fig. 2-4, the fixing base 30 includes a first mounting seat 350 and a fixing body 360, the fixing body 360 is connected to the base 20 through the first mounting seat 350 and is supported by the first mounting seat 350, and the fixing body 360 and the base can be a separate structure formed by screwing and riveting or an integral structure formed by welding or casting.

The bottom surface of the first mounting seat 350 can be a plane to provide a stable supporting effect, further the first mounting seat 350 can comprise a bottom plate and a rib plate, the rib plate is vertically welded on the top surface of the bottom plate to form a structure with a T-shaped section, the arrangement saves materials relative to the block-shaped first mounting seat 350, and the spare parts on two sides of the rib plate provide space for mounting other structures.

Of course, the first mounting seat 350 may also be cut from an i-steel to form a structure with an "i" cross section.

The fixed body 360 is disposed on the first mounting seat 350, in some embodiments, the fixed body 360 may be a multi-jaw chuck disposed on the first mounting seat 350, a movable jaw is disposed on the chuck, the movable jaw can clamp the connecting column 311 of the sealing element 310, an axis of the connecting column 311 is parallel to a bottom surface of the first mounting seat 350, and the sealing element 310 can be clamped by radial movement of the movable jaw.

Referring to fig. 2 and 3, in the present embodiment, a driving device is disposed on the loading base 40, and a testing ram 440 is disposed on the driving device, the driving device is used for driving the testing ram 440 to reciprocate toward the fixing base 30, and the testing ram 440 reciprocally presses the sealing member 310. The test pressure head 440 has the same structure as the valve core of the valve, so that when the test pressure head 440 presses the sealing member 310, the process that the valve core presses the sealing member 310 is simulated, and the detection of the sealing member 310 is realized.

It is worth noting that the valve core structures of different valves are different, so that the structure of the test pressure head 440 is reasonably arranged, the structure of the test pressure head 440 is the same as the valve core structure corresponding to the sealing element 310, and the test precision is improved.

The driving device is not limited in this embodiment as long as the test ram 440 can be driven to reciprocally press the sealing member 310; illustratively, as shown in fig. 5, the driving device may be a piezoelectric actuator 410, that is, the driving device converts electrical energy into mechanical energy by using the inverse piezoelectric effect to drive the test indenter 440. The piezoelectric actuator 410 has high loading precision, can achieve nanoscale displacement loading, and improves the accuracy of the test. Of course, the driving device may be a driving mechanism such as an air cylinder or a hydraulic cylinder.

With continued reference to fig. 2 and 3, the seal testing apparatus of the present embodiment further includes a displacement detecting device 50, the displacement detecting device 50 is disposed between the fixed seat 30 and the loading seat 40, and the displacement detecting device 50 is used for detecting the depth of the test ram 440 pressed into the seal 310. In order to ensure the sealing performance between the sealing member 310 and the valve core, the sealing member 310 is generally configured as an elastic member, when the test ram 440 presses the sealing member 310, the sealing member 310 is elastically deformed, and the depth of the test ram 440 pressed into the sealing member 310, i.e., the deformation amount of the sealing member 310 when the sealing member is pressed, can be detected by the displacement detecting device 50.

For example, the displacement detecting device 50 may be a laser range finder, and the laser range finder may be disposed on the loading base 40 or the fixing base 30, which is not limited in this embodiment; the laser distance meter detects a distance from the test indenter 440 to the laser rangefinder when the test indenter 440 is in contact with the sealing member 310, and when the driving device drives the test indenter 440 to be pressed into the sealing member 310, the laser rangefinder detects another distance from the test indenter 440 to the laser rangefinder, and the difference between the two distances can obtain a depth of the test indenter 440 pressed into the sealing member 310.

The working process of the testing device for the sealing element provided by the embodiment is as follows: firstly, the sealing element 310 is installed on the fixed seat 30, and then the test pressure head 440 is driven by the driving device to move towards the fixed seat 30, so that the test pressure head 440 presses the sealing element 310, and the contact process of the valve core and the sealing element 310 is simulated; at the same time, the displacement detecting device 50 detects the depth of the test ram 440 pressed into the sealing member 310; thereby enabling testing of the seal 310.

It should be noted that the depth of the test ram 440 pressed into the sealing member 310 can be detected by the displacement detecting device 50, and the driving device can be controlled to press the sealing member 310 at the same depth; the accuracy of the test of the seal 310 is improved. Of course, the driving device can control the test ram 440 to press into the seal 310 at different depths according to different valve conditions, thereby improving the versatility of the test device.

In the testing device for the sealing element provided by this embodiment, the sealing element 310 is arranged on the fixed seat 30, the fixed seat 30 and the loading seat 40 are oppositely arranged, the loading seat 40 is provided with the driving device, the driving device is provided with the testing pressure head 440, and the driving device is used for driving the testing pressure head 440 to reciprocate towards the fixed seat 30, so that the testing pressure head 440 can reciprocally press the sealing element 310, and further simulate the matching between the valve core and the sealing element 310; a displacement detecting means 50 is provided between the fixed holder 30 and the charging holder 40, and the displacement detecting means 50 detects the depth of the test ram 440 pressed into the sealing member 310. The depth of the test indenter 440 pressed into the seal 310 can be accurately obtained, which improves the accuracy of the test of the seal 310, compared to observing the indentation in the seal 310 after pressing the seal 310 to reflect the depth of the indenter pressed into the seal 310.

Referring to fig. 2 and 3, in the present embodiment, the displacement detecting device 50 includes a testing board 510 and a distance detecting device 520, the testing board 510 is disposed on the testing ram 440, the distance detecting device 520 is disposed on the fixing base 30, and the distance detecting device 520 is used for detecting a distance between the testing board 510 and the distance detecting device 520.

The test board 510 is a plate body with a surface having a high requirement for roughness, the test board 510 can receive and reflect signals such as light and waves, the material can be metal, and of course, the test board 510 can also be other organic or inorganic materials as long as the test board 510 can receive and reflect signals such as light and waves, and the embodiment of the present application is not limited.

Further, the distance detecting device 520 is a laser displacement sensor, the laser displacement sensor includes a laser emitter and a laser receiver, the laser emitter is configured to emit laser to the testing board 510, and the laser receiver is configured to receive reflected laser from the testing board 510. The processor in the receiver calculates the displacement by calculating the time it takes for the laser to encounter the test plate 510 and return to the receiver. Non-contact nondestructive testing is realized through the laser displacement sensor, the interference during testing is less, and the accuracy of the testing result is ensured.

In other embodiments, the distance measuring device 520 may also be an ultrasonic displacement sensor, which includes an ultrasonic transmitter and an ultrasonic receiver, wherein the ultrasonic transmitter transmits ultrasonic waves, which are received by the test board 510 and reflected back to the ultrasonic receiver, and the distance between the distance measuring device 520 and the test board 510 is calculated by calculating the time taken for the ultrasonic waves to encounter the test board 510 and return to the receiver.

Further, with continued reference to figures 2 and 3, a test plate 510 is positioned on the test ram 440, and the test plate 510 may be welded or threaded onto the test ram 440 or may be attached to the test ram 440 using U-shaped clips.

Further, the distance detection device 520 is disposed on the fixing base 30, and the distance detection device 520 may be welded or screwed. In an embodiment where the first mounting seat 350 is of a "T" type structure, the distance detection device 520 may be mounted on both sides of the rib plate by mounting clips 530.

Of course, the distance detecting device 520 may be directly and fixedly mounted on the base 20, and the direction of the signal from the distance detecting device 520 is parallel to the moving direction of the test head 440, and the direction of the signal from the distance detecting device 520 is perpendicular to the receiving surface of the test board 510.

The testing board 510 moves along with the testing ram 440, and the distance detecting device 520 is fixedly arranged, and the displacement of the testing board 510 can obtain the displacement of the compressed sealing member 310.

In other embodiments, the distance detecting device 520 is mounted on the testing ram 440, the testing board 510 is mounted on the fixing base 30, the testing board 510 is fixedly disposed, and the distance detecting device 520 moves along with the testing ram 440, so that the compressed displacement of the sealing member 310 can be obtained by measuring the displacement change between the testing board and the distance detecting device 520.

Further, as shown in fig. 2-4, a pressure detecting device 60 is disposed on the fixing base 30, and the pressure detecting device 60 is connected to the sealing member 310 for detecting the pressure applied to the sealing member 310.

When the pressure testing device is used, the pressure testing device 60 starts to display readings after the testing pressure head 440 contacts the sealing element 310, at the moment, the reading a of the displacement testing device 50 is recorded, and when the display readings of the pressure testing device 60 reach the working condition preset value, the reading b of the displacement testing device 50 is recorded, so that the depth of the indentation is b-a. Therefore, by arranging the pressure testing device, the indentation depth testing under different pressure values is realized, the diversity of the testing method is increased, and the accuracy of the testing result is further ensured.

Further, the pressure detecting device 60 may be a local pressure gauge, a sensing element is disposed in the pressure gauge, and during detection, the sensing element is deformed by the pressure applied to the sealing member 310, so as to drive the pointer in the dial to rotate, thereby detecting the stress applied to the sealing member 310.

In other embodiments, the pressure detecting device 60 is a pressure sensor, a strain gauge is disposed in the pressure sensor, the sealing element 310 is pressed to drive the strain gauge to deform, so that the resistance value of the strain gauge changes, a processing circuit in the pressure sensor outputs the change of the resistance value to a computer in the form of an electrical signal, and the computer calculates the pressure value.

Further, as shown in fig. 3 and 4, the fixing base 30 is provided with a mounting hole 320 in a direction away from the base 20, a fixing tube 330 penetrates through the mounting hole 320, one end of the fixing tube 330 facing the loading base 40 is used for connecting the sealing element 310, the diameter of the fixing tube 330 is smaller than the outer diameter of the sealing element 310, and further, the sealing element 310 can be glued on the fixing tube 330 to fix the sealing element 310.

To facilitate the description of the specific implementation manner of the present embodiment, in the present embodiment, the pressure detection device 60 is taken as an example for describing a pressure sensor, as shown in fig. 3 and 4, in an embodiment where the sealing member 310 is provided with a connection column 311, a first through hole and a second through hole, whose center lines are on a straight line, are radially provided at an end portion of the fixed tube 330 near the sealing member 310, and a connection pin 331 is further provided, the connection pin 331 can be inserted into the first through hole and the second through hole, a third through hole penetrating in a radial direction is provided on the connection column 311 of the sealing member 310, the connection column 311 is inserted into the fixed tube 330, and a part of the sealing member 310 is disposed outside the fixed tube 330. The connecting pin 331 penetrates through the first through hole and the second through hole, penetrates through the third through hole simultaneously, and is in interference fit with the third through hole, and the length of the connecting pin 331 is between the inner diameter and the outer diameter of the fixing pipe 330, so that the sealing element 310 can be fixed along the axial direction, and the fixing pipe 330 can be arranged in the mounting hole 320 in a penetrating mode without being influenced. The above-described manner of installing the sealing member 310 facilitates replacement of the sealing member 310.

Further, referring to fig. 3 and 4, one end of the fixing tube 330 departing from the loading base 40 is connected to the pressure detecting device 60, an end of the fixing body 360 departing from the sealing member 310 is provided with a mounting cavity 321, the mounting cavity 321 is communicated with the mounting hole 320, the mounting cavity 321 is used for accommodating a pressure sensor, an end of the fixing tube 330 departing from the sealing member 310 is provided with a mounting flange 332, the mounting flange 332 is provided with a connecting hole, the pressure sensor is correspondingly provided with a threaded hole, the mounting hole 320 is connected to the threaded hole through a bolt, an upper wall of the mounting cavity 321 departing from the base 20 is provided with a wiring groove 322, and a connecting line 610 of the pressure sensor can pass through the wiring groove 322 and be connected to the outside. During testing, the pressure applied to the seal 310 is transmitted to the stationary tube 330, and the stationary tube 330 transmits the pressure to the pressure sensor, which is read by the computer.

In addition, a detachable second end cap 340 is further disposed at an end of the fixed seat 30 facing away from the sealing member 310, and further, the second end cap 340 may be screwed to the fixed seat 30. The provision of the second end cap 340 may facilitate maintenance of the pressure sensor.

Further, the testing ram 440 may be directly and fixedly connected to the driving end 411 of the driving device, and then the testing ram 440 is driven by the driving device to load the sealing member 310, for example, the testing ram 440 and the driving end 411 of the driving device are provided with matching threads, and the two are connected through the threads.

In other embodiments, the test ram 440 is indirectly connected to the driving end 411 of the driving device, and for convenience of describing implementation of the embodiment of the present application, a piezoelectric actuator 410 is taken as an example of the driving device, as shown in fig. 5, a sliding channel 420 is disposed on the loading seat 40, a sliding column 430 is slidably disposed in the sliding channel 420, one end of the sliding column 430 facing the fixing seat 30 is connected to the test ram 440, one end of the sliding column 430 facing away from the fixing seat 30 is connected to the piezoelectric actuator 410, further, when loading is performed, the driving end 411 of the piezoelectric actuator 410 abuts against the sliding column 430, the piezoelectric actuator 410 pushes the sliding column 430 to move, the piezoelectric actuator 410 stops loading, and when the driving end 411 retracts, the sliding column 430 is separated from the driving end 411, so as to improve loading sensitivity.

With continued reference to fig. 5, further, a rolling body 421 is disposed between the sliding channel 420 and the sliding column 430, and the rolling body 421 may be a ball or a cylinder. For convenience of illustration, the rolling body 421 is taken as a ball, and a spherical hole is disposed in the sliding channel 420, the ball is disposed in the spherical hole, the ball partially protrudes from the inner wall of the sliding channel 420, and the ball can rotate in the spherical hole, and the protruding portion of the ball is tangential to the sidewall of the sliding column 430. Through the arrangement, the friction force of the sliding column 430 in the sliding process is reduced, the abrasion between the sliding column 430 and the sliding channel 420 is further reduced, and the service life of the testing device is prolonged.

In other embodiments, a spherical hole is provided on the sliding post 430, a ball is disposed in the spherical hole, the ball partially protrudes from the outer wall of the sliding post 430, and the ball can rotate in the spherical hole, and the protruding portion of the ball is tangential to the sliding channel 420.

With continued reference to fig. 5, further, the sliding column 430 includes a first section 431 facing the fixing base 30 and a second section 432 away from the fixing base 30, the diameter of the first section 431 is smaller than that of the second section 432, a return spring 450 is sleeved on the first section 431, and the return spring 450 is used for driving the sliding column 430 to move toward the driving device. The return spring 450 is connected to the inner wall of the sliding channel 420 near the sealing member 310 at one end, and is connected to the end surface of the second segment 432 facing the sealing member 310 at the other end, which may be welded. Of course, the return spring 450 may also be movably connected to the second segment 432 and the sliding channel 420. The return spring 450 is in equilibrium when the drive is not in operation, the return spring 450 is in compression when the drive is loaded, and the return spring 450 is in return when the drive is retracted. By providing a return spring 450, the test ram 440 is reciprocated.

Further, in the embodiment where the sliding channel 420 is provided on the loading seat 40, the end of the sliding channel 420 facing the driving device is provided with a first end cap 460, the first end cap 460 is connected to the sliding channel 420 through a bolt, and the driving device is mounted on the first end cap 460. Through the first end cap 460, the sliding column 430 can be disassembled and assembled, and the maintenance of the parts in the sliding channel 420 is facilitated.

As shown in fig. 5, a thickened portion 461 is provided at the center of the first end cap 460, a through threaded hole may be provided on the thickened portion 461, an external thread is provided on the piezoelectric actuator 410, and the piezoelectric actuator 410 and the end cap are connected by a threaded fit. The thickened portion 461 lengthens the length of the connecting thread, improving the reliability of the mounting of the piezoelectric actuator 410.

In some embodiments, a first moving seat 70 is disposed between the loading seat 40 and the base 20, the first moving seat 70 includes a first seat body 710 connected to the base 20 and a second seat body 720 connected to the loading seat 40, a first torsion bar 730 is disposed on the first seat body 710, a first adjusting mechanism is disposed between the first seat body 710 and the second seat body 720, the first torsion bar 730 is in transmission connection with the first adjusting mechanism, the first adjusting mechanism is used for driving the second seat body 720 to rotate relative to the first seat body 710, and a rotation axis of the second seat body 720 is perpendicular to a center line of the driving device. The top and bottom surfaces of the first movable base 70 are provided with fifth mounting holes 716, and the connection with the base 20 and the load port 40 is achieved through the fifth mounting holes 716. The first movable seat 70 can adjust the loading angle of the testing ram 440 to realize multi-angle loading of the sealing member 310, so that the performance testing of the sealing member 310 is deeper and more comprehensive, and the testing result is more accurate.

Further, as shown in fig. 6-9, a concave smooth first curved surface is disposed on a surface of the first seat 710 facing away from the base 20, a convex smooth second curved surface is disposed on a surface of the second seat 720 facing away from the loading seat 40, the second curved surface is seated on the first curved surface, the second curved surface is tangent to the first curved surface, the second seat 720 is driven by the first adjusting mechanism to move along a curved surface extending direction, that is, a rotation axis of the second seat 720 is perpendicular to a central line of the driving device. The angle adjustment of the loading seat is realized through the relative motion between the tangent curved surfaces, and the method is reliable, simple and strong in operability.

Further, as shown in fig. 8 and 9, the first adjusting mechanism may be a first worm 741, a first driving groove 711 extending along the curved surface is correspondingly formed in the first curved surface, a first driving hole is formed in an end surface of the first seat 710 extending along the curved surface, the first driving hole is communicated with the first driving groove 711, the worm is installed in the first driving hole, and a part of the worm leaks outside the driving groove, the worm can rotate in the first driving hole, and meanwhile, first sliding rails 712 extending along the curved surface are formed on curved surfaces on two sides of the first driving groove 711. The second curved surface is provided with a first rack 742 along the extending direction of the curved surface, and curved surfaces on two sides of the first rack 742 are provided with first sliding grooves 721 along the extending direction of the curved surface, when the device is installed, the first rack 742 is engaged with the first worm 741, and the first worm 741 drives the first rack 742 to move, so as to drive the second seat 720 to rotate along the curved surface. The first slide rail 712 cooperates with the first slide slot 721 to realize the limiting movement of the first seat 710 and the second seat 720. Through the arrangement, the reliability of the rotation of the second seat body 720 is ensured.

In other embodiments, as shown in fig. 6 and 7, the first adjusting mechanism is a first screw 715, and correspondingly, two dovetail grooves 722 are respectively disposed on two end surfaces of the second seat 720 perpendicular to the second curved surface, and two rails 713 of the first seat 710 perpendicular to the first curved surface, and the dovetail grooves 722 cooperate with the rails 713 to achieve a guiding effect. A first groove 714 is formed in the first seat 710, a first threaded hole is formed in an end surface of the first seat 710 perpendicular to the arc surface, the first threaded hole is communicated with the first groove 714, the first screw 715 is installed in the first threaded hole and extends into the first groove 714, and the first torsion bar 730 is rotated to enable the first adjusting mechanism to move in the first groove 714. The second curved surface is provided with a stop 723 protruding toward the first seat 710, and the stop 723 corresponds to the first screw 715, so that when the first screw 715 moves in the first groove 714, the stop 723 can be pushed to move, and the first seat 710 is driven to move, thereby adjusting the angle of the loading seat. Above-mentioned setting adopts thrust type drive at that time, makes first pedestal 710 remove along the curved surface, and the area of contact is little, avoids appearing the stuck phenomenon for the adjustment process is more level and smooth.

Further, as shown in fig. 2 and 3, a second moving base 80 is disposed between the first moving base 70 and the base 20, as shown in fig. 10 and 11, a second torsion bar 820 and a second adjusting mechanism 830 in transmission connection with the second torsion bar 820 are disposed on the second moving base 80, the second adjusting mechanism 830 is connected with the first moving base 70, and the second adjusting mechanism 830 is used for driving the first moving base 70 to move along a direction parallel to the center line of the driving device. The second movable base 80 has sixth mounting holes 860 on the top and bottom surfaces thereof, and is connected to the base 20 and the first base 70 through the sixth mounting holes 860. The second movable seat 80 can adjust the distance between the testing pressure head 440 and the sealing element 310, thereby enlarging the loading stroke range and facilitating the debugging process before testing.

Further, as shown in fig. 10 and 11, the second moving seat 80 includes a base and a moving platform 810, two parallel second sliding rails 840 are disposed on the base at intervals, two parallel second sliding grooves are disposed on the table top on one side of the moving platform 810 at intervals, the moving platform 810 is mounted on the base through the cooperation of the second sliding rails 840 and the second sliding grooves, and the moving platform 810 can move on the base along the direction of the second sliding rails 840. The second adjustment mechanism 830 drives the movable stage 810 to move along the second sliding rail 840.

Further, the second adjusting mechanism 830 is a second worm, a second driving hole is correspondingly formed in the base perpendicular to the extending direction of the second guide rail, and a second driving groove is formed in the surface of the base facing the moving stage 810, and the second driving groove is communicated with the second driving hole. The second worm is installed in the second drive hole to partly naked leak outside the second drive groove, the second worm can rotate in the second drive hole, is equipped with the second rack along second slide rail 840 extending direction on the bottom surface of mobile station 810 towards the base. During installation, the second rack is engaged with the second worm, and the second worm drives the second rack to move, so as to drive the mobile station 810 to move along the second sliding rail 840. The above arrangement ensures the reliability of the movement of the second movable base 80.

In other embodiments, as shown in fig. 10 and 11, the second adjusting mechanism 830 is a second screw, a second groove is correspondingly formed on the surface of the base facing the first moving seat 70, a second threaded hole is formed on the end surface of the base perpendicular to the direction in which the second guide rail extends, the second threaded hole is communicated with the second groove, the second screw is installed in the second thread and extends into the second groove, and the second torsion bar 820 is rotated to enable the second adjusting mechanism 830 to move in the second groove and to push the moving platform 810 to move in the second groove, so as to adjust the distance between the loading seat and the fixed seat 30.

Further, in some embodiments, the top of the base 20 has an installation inclined plane, the fixing seat 30 and the loading seat 40 are both disposed on the installation inclined plane, the installation inclined plane is disposed obliquely relative to the horizontal plane, in order to better observe the dynamic change of the sealing element 310 during the loading process, the testing device can be placed on the stage of an electron microscope, and the dynamic change of the sealing element 310 is observed through the electron microscope, so as to implement deeper analysis on the performance of the sealing element 310.

Wherein the mounting bevel provided on the base 20 provides an optimal viewing angle for observing the loading process of the sealing member 310. The inclination angle is set according to the optimal observation angle of the electron microscope.

Further, as shown in fig. 2 and 3, the bottom of the base 20 has a mounting groove 210, and the mounting groove 210 is used for matching with the scanning electron microscope stage.

Of course, a carrier with an inclined surface may be further provided, the base 20 is placed on the inclined surface, and a protrusion perpendicular to the inclined surface is provided at the bottom end of the inclined surface to prevent the substrate from sliding. The loading seat is additionally arranged to facilitate the switching between the horizontal loading direction and the inclined loading direction.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (7)

1. The testing device for the sealing element is characterized by comprising a base, a fixed seat and a loading seat, wherein the fixed seat and the loading seat are arranged on the base;

the fixed seat is used for fixing a sealing element; the loading seat is provided with a driving device, a testing pressure head is arranged at the driving end of the driving device, and the driving device is used for driving the testing pressure head to reciprocate towards the fixed seat so as to enable the testing pressure head to extrude the sealing element;

a displacement detection device is arranged between the fixed seat and the loading seat and is used for detecting the depth of the test pressure head pressed into the sealing element;

a sliding channel is arranged on the loading seat, a sliding column is arranged in the sliding channel in a sliding mode, one end, facing the fixed seat, of the sliding column is connected with the testing pressure head, and one end, facing away from the fixed seat, of the sliding column is connected with the driving device; a rolling body is arranged between the sliding channel and the sliding column;

the sliding column comprises a first section facing the fixed seat and a second section far away from the fixed seat, the diameter of the first section is smaller than that of the second section, a return spring is sleeved on the first section, and the return spring is used for driving the sliding column to move towards the driving device;

a first moving seat is arranged between the loading seat and the base and comprises a first seat body connected with the base and a second seat body connected with the loading seat, wherein a concave smooth first curved surface is arranged on the surface of the first seat body deviating from the base, a convex smooth second curved surface is arranged on the surface of the second seat body deviating from the loading seat, and the second curved surface is tangent to the first curved surface; the first seat body is provided with a first torsion rod, a first adjusting mechanism is arranged between the first seat body and the second seat body, the first torsion rod is in transmission connection with the first adjusting mechanism, and the first adjusting mechanism is used for driving the second seat body to move along the extension direction of the curved surface.

2. The device for testing a sealing member according to claim 1, wherein the displacement detecting means includes a test board disposed on the test head, and a distance detecting means disposed on the holder for detecting a distance between the test board and the holder.

3. The device for testing sealing members according to claim 2, wherein said distance detection means comprises a laser emitter and a laser receiver disposed on said holder, said laser emitter being adapted to emit laser light towards said test plate, said laser receiver being adapted to receive reflected laser light from said test plate.

4. The device for testing the sealing element according to claim 2, wherein a pressure detecting device is disposed on the fixing base, and the pressure detecting device is connected to the sealing element and used for detecting the pressure applied to the sealing element.

5. The device for testing the sealing element according to claim 4, wherein a mounting hole is formed in the fixing seat, a fixing tube is arranged in the mounting hole in a penetrating manner, one end of the fixing tube facing the loading seat is used for being connected with the sealing element, and one end of the fixing tube facing away from the loading seat is connected with the pressure detection device.

6. The device for testing the sealing element according to claim 1, wherein a second moving seat is disposed between the first moving seat and the base, a second torsion bar is disposed on the second moving seat, and a second adjusting mechanism is in transmission connection with the second torsion bar, the second adjusting mechanism is connected with the first moving seat, and the second adjusting mechanism is used for driving the first moving seat to move along a direction parallel to a center line of the driving device.

7. The seal testing device according to any one of claims 1 to 5, wherein the top of the base has a mounting slope on which the fixed seat and the loading seat are both disposed, the mounting slope being disposed obliquely with respect to a horizontal plane;

the bottom of base has the assembly groove, the assembly groove is used for cooperating with scanning electron microscope objective table.

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