阅读说明：本技术 试验机 (Testing machine ) 是由 顾仁喜 刘杜君 蒋岁 梁广瑞 于 2021-09-27 设计创作，主要内容包括：一种试验机,包括机台和测试装置,机台包括框架结构、侧板组件和电控箱,侧板组件设置在框架结构的周侧并形成腔体结构,电控箱设置在腔体结构的外侧；测试装置包括测试机构、供液机构和电控机构,测试机构安装在框架结构上,用于对安装在测试机构内的密封圈进行测试；供液机构设置在腔体结构内,为测试机构提供液压动力；电控机构与测试机构上的油温传感器及供液机构上的电机连接,使得电机能够带动供液机构上的油泵向测试机构提供液压油；框架结构从框架结构的一侧到框架结构的另一侧分为两部分,电机和油泵依次安装在其中一部分上,供液机构的油箱安装在另一部分,油箱上安装有与测试机构连通的加载回路,电控箱设置在框架结构位于油箱的一侧。(A testing machine comprises a machine table and a testing device, wherein the machine table comprises a frame structure, a side plate assembly and an electric cabinet, the side plate assembly is arranged on the peripheral side of the frame structure and forms a cavity structure, and the electric cabinet is arranged on the outer side of the cavity structure; the testing device comprises a testing mechanism, a liquid supply mechanism and an electric control mechanism, wherein the testing mechanism is arranged on the frame structure and used for testing the sealing ring arranged in the testing mechanism; the liquid supply mechanism is arranged in the cavity structure and provides hydraulic power for the testing mechanism; the electric control mechanism is connected with the oil temperature sensor on the testing mechanism and the motor on the liquid supply mechanism, so that the motor can drive the oil pump on the liquid supply mechanism to supply hydraulic oil to the testing mechanism; the frame construction is divided into two parts from one side of the frame construction to the other side of the frame construction, the motor and the oil pump are sequentially arranged on one part, the oil tank of the liquid supply mechanism is arranged on the other part, the oil tank is provided with a loading loop communicated with the testing mechanism, and the electric cabinet is arranged on one side of the frame construction located on the oil tank.)

1. The utility model provides a testing machine for sealing washer test, its characterized in that includes:

the side plate assembly is arranged on the peripheral side of the frame structure and forms a cavity structure, and the electric cabinet is arranged on the outer side of the cavity structure;

the testing device comprises a testing mechanism, a liquid supply mechanism and an electric control mechanism, wherein the testing mechanism is arranged on the frame structure and is used for testing the sealing ring arranged in the testing mechanism; the liquid supply mechanism is arranged in the cavity structure and provides hydraulic power for the testing mechanism; the electric control mechanism is connected with the oil temperature sensor on the testing mechanism and the motor on the liquid supply mechanism, so that the motor can drive the oil pump on the liquid supply mechanism to supply hydraulic oil to the testing mechanism;

the testing device comprises a frame structure, a motor, an oil pump, a liquid supply mechanism, a testing mechanism, an electric cabinet and an electric control mechanism, wherein the frame structure is divided into two parts from one side of the frame structure to the other side of the frame structure, the motor and the oil pump are sequentially arranged on one part, an oil tank of the liquid supply mechanism is arranged on the other part, a loading loop communicated with the testing mechanism is arranged on the oil tank, the electric cabinet is arranged on one side of the frame structure, which is located on the oil tank, and the electric control mechanism is arranged in the electric cabinet.

2. The testing machine of claim 1, wherein the testing mechanism comprises a drive assembly, a transmission assembly and a testing assembly, the drive assembly is in transmission connection with the testing assembly through the transmission assembly, so that the testing assembly can test the sealing ring.

3. The testing machine of claim 2, wherein the testing assembly comprises a first testing cylinder and a second testing cylinder, the first testing cylinder and the second testing cylinder are in transmission connection with the transmission assembly and are parallel to each other, and the first testing cylinder and the second testing cylinder are used for testing the sealing ring.

4. The testing machine of claim 3, wherein the loading circuit includes a first pressure valve and a second pressure valve, the first test cylinder being in communication with one of the supply circuits through the first pressure valve, the first test cylinder being in communication with the other supply circuit through the second pressure valve.

5. The testing machine of claim 4, wherein the loading circuit includes a first control valve disposed between the first pressure valve and the drive assembly for controlling the cylinder speed of a drive cylinder on the drive assembly.

6. The testing machine of claim 4, wherein the loading circuit includes a second control valve disposed between the testing device and the first and second pressure valves for controlling the testing pressure of the testing device.

7. The testing machine of claim 6, wherein the loading circuit further comprises a boost cylinder disposed between the second control valve and the first and/or second test cylinders.

8. The testing machine of claim 6, wherein the loading circuit includes a third control valve connected between the first and second test cylinders and a tank.

9. The testing machine of claim 6, wherein the loading circuit includes a sequence valve disposed between the second control valve and a second pressure valve.

10. The testing machine of claim 3, wherein a first sensor and a second sensor are arranged on the testing component, and the first sensor and the second sensor are correspondingly arranged on the first testing oil cylinder and the second testing oil cylinder.

Technical Field

The invention relates to the field of sealing ring detection, in particular to a testing machine.

Background

Along with the development of science and technology, the quantity of sealing equipment is increasing gradually, and in sealing equipment, the performance and the life-span of machine have directly been decided to the quality of leakproofness, and at present, the sealing washer can not obtain timely detection at the in-process of using, and the sealing washer life-span can not be ensured, often appears sealed problem of revealing, not only can lead to equipment stop work, but also probably leads to equipment out of control or reveal accidents such as pollution.

Wherein, the performance of sealing washer raw and other materials decides the service behavior of sealing washer. The process adopted in the processing process of the sealing ring also influences the performance of the sealing ring. The design of the overall dimension of the sealing ring has no specific parameters for the sealing effect and the friction force generated by the sealing ring under different working pressures, and sealing ring manufacturers have no specific parameters.

Disclosure of Invention

The invention provides experimental equipment which can simulate the use working condition (except low-temperature environment) of a sealing ring, and solve the problem that the existing sealing ring is difficult to test for testing the high temperature resistance, high pressure resistance, low pressure leakage resistance, the service life of the sealing ring, the use speed of the sealing ring and the friction force under the action of various temperatures and pressures.

The invention provides a testing machine for testing a sealing ring, which comprises:

the side plate assembly is arranged on the peripheral side of the frame structure and forms a cavity structure, and the electric cabinet is arranged on the outer side of the cavity structure;

the testing device comprises a testing mechanism, a liquid supply mechanism and an electric control mechanism, wherein the testing mechanism is arranged on the frame structure and is used for testing the sealing ring arranged in the testing mechanism; the liquid supply mechanism is arranged in the cavity structure and provides hydraulic power for the testing mechanism; the electric control mechanism is connected with the oil temperature sensor on the testing mechanism and the motor on the liquid supply mechanism, so that the motor can drive the oil pump on the liquid supply mechanism to supply hydraulic oil to the testing mechanism;

the testing device comprises a frame structure, a motor, an oil pump, a liquid supply mechanism, a testing mechanism, an electric cabinet and an electric control mechanism, wherein the frame structure is divided into two parts from one side of the frame structure to the other side of the frame structure, the motor and the oil pump are sequentially arranged on one part, an oil tank of the liquid supply mechanism is arranged on the other part, a loading loop communicated with the testing mechanism is arranged on the oil tank, the electric cabinet is arranged on one side of the frame structure, which is located on the oil tank, and the electric control mechanism is arranged in the electric cabinet.

In the testing machine according to an embodiment of the present invention, the testing mechanism includes a driving component, a transmission component and a testing component, and the driving component is in transmission connection with the testing component through the transmission component, so that the testing component can test the sealing ring.

In the testing machine according to an embodiment of the present invention, the testing assembly includes a first testing cylinder and a second testing cylinder, and the first testing cylinder and the second testing cylinder are in transmission connection with the transmission assembly and are parallel to each other, and are used for testing the sealing ring.

In the testing machine according to one embodiment of the present invention, the loading circuit includes a first pressure valve and a second pressure valve, the first test cylinder is communicated with one of the liquid supply circuits through the first pressure valve, and the first test cylinder is communicated with the other liquid supply circuit through the second pressure valve.

In the testing machine according to an embodiment of the present invention, the loading circuit includes a first control valve, and the first control valve is disposed between the first pressure valve and the driving assembly, and is configured to control a cylinder speed of a driving cylinder on the driving assembly.

In the testing machine according to an embodiment of the present invention, the loading circuit includes a second control valve provided between the testing device and the first and second pressure valves, for controlling the testing pressure of the testing device.

In the testing machine according to an embodiment of the present invention, the loading loop further includes a booster cylinder, and the booster cylinder is disposed between the second control valve and the first test cylinder and/or the second test cylinder.

In the testing machine according to an embodiment of the present invention, the loading circuit includes a third control valve, and the third control valve is connected between the first and second test cylinders and the oil tank.

In the testing machine according to an embodiment of the present invention, the load circuit includes a sequence valve disposed between the second control valve and the second pressure valve.

In the testing machine according to an embodiment of the present invention, the testing assembly is provided with a first sensor and a second sensor, and the first sensor and the second sensor are correspondingly mounted on the first testing cylinder and the second testing cylinder.

The technical scheme provided by the embodiment of the application can have the following beneficial effects: the testing machine is designed, and the testing mechanism is arranged on the testing machine, so that the sealing ring arranged in the testing device can be tested, the problem that the existing sealing ring is difficult to test is solved, and a large amount of labor cost is reduced; and the electric cabinet and the liquid supply mechanism are separately arranged, so that gas-electricity separation is realized, the contact between a liquid supply loop of the liquid supply mechanism and each component and/or cable of the electric cabinet can be effectively avoided, related safety accidents are avoided, the safety factor of the testing machine is higher, and the use safety is ensured.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a block diagram of a testing machine according to an embodiment of the present invention;

FIG. 2 is an exploded view of the testing machine of FIG. 1;

FIG. 3 is a schematic diagram of the machine of FIG. 1;

FIG. 4 is a schematic view of a portion of the machine tool shown in FIG. 1;

FIG. 5 is a schematic structural diagram of the test apparatus of FIG. 1;

FIG. 6 is a schematic view of the test apparatus of FIG. 1 at another angle;

FIG. 7 is a schematic diagram of the testing mechanism of FIG. 1;

FIG. 8 is an exploded schematic view of the testing mechanism of FIG. 1;

FIG. 9 is a schematic structural view of the liquid supply mechanism of FIG. 1;

FIG. 10 is a partial block diagram of the liquid supply mechanism of FIG. 1;

FIG. 11 is a partially exploded view of the liquid supply mechanism of FIG. 1;

FIG. 12 is a schematic view of a fluid path system of the fluid supply mechanism of FIG. 1.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

As shown in fig. 1 to 11, the present application provides a testing machine for testing a sealing ring, the testing machine includes a testing device 100 and a machine table 200, and the testing device 10 is installed on the machine table 200. Wherein, board 200 includes frame construction 201, curb plate subassembly 202 and electric cabinet 203, and curb plate subassembly 202 sets up in frame construction 201 week side and forms cavity structures, and electric cabinet 203 sets up in cavity structures's the outside, and frame construction 201's upper end is provided with fixed plate 2012, and wherein some testing arrangement 100 install on fixed plate 2012, and remaining some testing arrangement 100 hold in cavity structures and electric cabinet 203.

In an alternative embodiment, the testing device 100 includes a testing mechanism 10, a liquid supply mechanism 20, and an electric control mechanism, wherein the testing mechanism 10 is mounted on a fixing plate 2012 of the frame structure 201 for testing the gasket mounted in the testing mechanism 10.

In an alternative embodiment, the liquid supply mechanism 20 is disposed in the cavity structure to provide hydraulic power to the testing mechanism 10, so that the testing mechanism 10 can simulate the working environment of the sealing ring to meet the testing requirements of the sealing ring.

In an alternative embodiment, the electric control mechanism is connected to an oil temperature sensor on the testing mechanism and a motor 25 on the liquid supply mechanism 20, so that the motor 25 can drive an oil pump 24 on the liquid supply mechanism 20 to supply hydraulic oil to the testing mechanism 10, thereby ensuring that the testing mechanism 10 can work normally.

In the embodiment, the frame structure 201 is divided into two parts from one side of the frame structure 201 to the other side of the frame structure 201, the motor 25 and the oil pump 24 are sequentially installed on one part, the oil tank 21 of the liquid supply mechanism 20 is installed on the other part, wherein the oil tank 21 is provided with the loading loop 23, the oil tank 21 is communicated with the testing mechanism 10 through the loading loop 23, the electric cabinet 203 is arranged on one side of the frame structure 201 on the oil tank 21, the electric control mechanism is installed in the electric cabinet 203, so that the electric control mechanism and the liquid supply mechanism 20 are separately arranged, the gas-electricity separation is realized, the contact between the liquid supply mechanism 20 and each component and/or cable on the electric control mechanism can be effectively avoided, the occurrence of related safety accidents is avoided, the safety coefficient of the testing machine is higher, and the use safety is ensured; and simultaneously, the discharge of pipelines on the liquid supply mechanism 20 and cables connected between various components in the tester is facilitated.

In an optional implementation manner, the pipeline on the liquid supply mechanism 20 may be arranged inside the frame structure 201, and cables between components of the electric control mechanism disposed inside the electric cabinet 203 may be arranged inside the electric cabinet 203, so as to avoid the problem of mutual winding caused by the crossing of the cables and the pipeline, which is not only beneficial to the ordered discharge of the pipeline and the cables inside the testing machine, but also can avoid the influence of heat generated by the cables when supplying power to the pipeline, so that the service life of the pipeline is shortened, and the device has the characteristics of reasonable layout, convenient installation, convenience in rapid maintenance, cost saving and the like.

In an alternative embodiment, the testing mechanism 10 includes a driving assembly 13, a transmission assembly 12 and a testing assembly 11, wherein the driving assembly 13 is in transmission connection with the testing assembly 11 through the transmission assembly 12, so that the testing assembly 11 can test the sealing ring, and the testing mechanism is not only simple in structure, but also low in manufacturing cost.

Exemplarily, the test assembly 11 includes a first test oil cylinder and a second test oil cylinder, and the first test oil cylinder and the second test oil cylinder are in transmission connection with the transmission assembly 12 and are parallel to each other for testing the sealing ring.

Specifically, the driving assembly 13 is in transmission connection with the testing assembly 11 through the transmission assembly 12, so that the movable rod on the testing assembly 11 can reciprocate at a movement speed required by a test, and a sealing ring in the testing assembly 11 is detected. In this embodiment, the testing component 11 includes a first testing cylinder and a second testing cylinder, and is used for detecting the sealing rings installed in the first testing cylinder and the second testing cylinder, so as to ensure that the sealing rings of the comparison test can be performed under the same testing condition, and meanwhile, the testing period of the sealing rings is also shortened, and the testing efficiency is improved.

Exemplarily, the sealing ring to be tested is installed in the first test oil cylinder and the second test oil cylinder, and the driving component 13 is connected with the movable rod on the test component 11 through the transmission component 12, so that the movable rod can reciprocate according to the movement speed required by the sealing ring in the test process, and the working environment of the sealing ring can be simulated to meet the test requirement of the sealing ring. And a plurality of groups of sealing rings are tested simultaneously, so that the testing efficiency is high.

Wherein, drive assembly 13 can be the cylinder, and drive assembly 13 also can be the hydro-cylinder, and drive assembly 13 still can be the motor, and this application does not put the restriction, and its purpose mainly in order to drive the movable rod reciprocating motion on first experimental hydro-cylinder and the experimental hydro-cylinder of second can.

In an alternative embodiment, the driving assembly 13 includes a driving oil cylinder, and the driving oil cylinder is connected with the movable rods on the first test oil cylinder and the second test oil cylinder through the transmission assembly 12, so that the movable rods on the first test oil cylinder and the second test oil cylinder can perform reciprocating motion according to the motion speed required by the test, and the structure is simple and practical.

Exemplarily, the driving oil cylinder comprises a driving cylinder body, a piston rod, a first driving cylinder cover and a second driving cylinder cover, wherein the first driving cylinder cover and the second driving cylinder cover are arranged at two ends of the driving cylinder body and fixed on the frame 10, one end of the piston rod is movably installed in the driving cylinder body, and the other end of the piston rod is connected with the transmission assembly 12, so that the transmission assembly 12 can drive the movable rods on the first testing oil cylinder and the second testing oil cylinder to perform reciprocating motion according to the motion speed required by the test.

In an alternative embodiment, the transmission assembly 12 includes a connecting block 122, and the piston rod of the driving cylinder is connected to the movable rods of the first and second test cylinders through the connecting block.

Exemplarily, the movable rod includes a first movable rod and a second movable rod, the first movable rod is arranged in the first test cylinder in a penetrating manner, the second movable rod is arranged in the second test cylinder in a penetrating manner, and one end of the connecting block 122, which is opposite to the piston rod, is connected with the first movable rod and the second movable rod, so that the driving cylinder can drive the movable rods on the first test cylinder and the second test cylinder to perform reciprocating motion according to the motion speed required by the test.

In an alternative embodiment, the opposite ends of the connection block 122 are respectively provided with a driving hole and two connection holes, which are respectively a first connection hole and a second connection hole. The piston rod is connected in the driving hole, the movable rods on the first test oil cylinder and the second test oil cylinder are correspondingly connected with the two connecting holes, if the first movable rod is connected to the first connecting hole, the second movable rod is connected to the second connecting hole.

Illustratively, the transmission assembly 12 further includes a fixing member for fixing the piston rod to the driving hole, fixing the first movable rod to the first connecting hole, and fixing the second movable rod to the second connecting hole.

In an alternative embodiment, the transmission assembly 12 further includes a sliding rail assembly 121, and the connection block 122 is mounted on the frame 10 through the sliding rail assembly 121.

In an alternative embodiment, the number of the slide rail assemblies 121 is two, wherein one set of the slide rail assemblies 121 is installed below the movable rod of the first testing cylinder, and the other set of the slide rail assemblies 121 is installed below the movable rod of the second testing cylinder.

For example, a mounting seat 2011 is further installed on the frame structure 201, and the mounting seat 2011 is fixed on the fixing plate 2012 and includes a first mounting seat, a second mounting seat, a third mounting seat, a fourth mounting seat and a fifth mounting seat. The first mounting seat and the second mounting seat are arranged at an interval, the first testing oil cylinder and the second testing oil cylinder are arranged above the first mounting seat and the second mounting seat, the number of the third mounting seats is two, the two third mounting seats are arranged at an interval and are perpendicular to the second mounting seat, the two sets of slide rail assemblies 121 are correspondingly arranged on the two third mounting seats, the fourth mounting seat and the fifth mounting seat are arranged at an interval and are perpendicular to the extension lines of the third mounting seat or the third mounting seat, and the driving oil cylinder is arranged on the fourth mounting seat and the fifth mounting seat.

The sliding rail assembly adopts a high-precision linear sliding rail, so that the eccentric load of a movable rod of the first test oil cylinder and/or the second test oil cylinder is reduced, and the sealing effect of the sealing ring is influenced.

In an optional embodiment, the testing assembly 11 further includes a tension sensor 14, and the tension sensor 14 includes a first tension sensor and a second tension sensor, where the first tension sensor and the second tension sensor are correspondingly connected between the connecting block and the movable rods on the first testing cylinder and the second testing cylinder.

In an alternative embodiment, the first testing cylinder is provided with a first oil inlet, the second testing cylinder is provided with a second oil inlet, the first oil inlet and the second oil inlet are connected together through an oil inlet pipe, and the other end of the oil inlet pipe is connected to the liquid supply mechanism 20.

In an optional embodiment, a first oil outlet is formed in the first test oil cylinder, a second oil outlet is formed in the second test oil cylinder, the first oil outlet and the second oil outlet are connected together through a pipeline, the pipeline is connected with a control valve, and the control valve can regulate and control the pressure of the first test oil cylinder and the pressure of the second test oil cylinder according to test requirements.

In an optional embodiment, oil seal seats are arranged at two ends of each of the first test oil cylinder and the second test oil cylinder, wherein the sealing rings are arranged on the oil seal seats, and the movable rod penetrates through the oil seal seats.

Exemplarily, first experimental hydro-cylinder includes first experimental hydro-cylinder body, first experimental hydro-cylinder lid, the experimental hydro-cylinder lid of second, first oil blanket seat, first guide ring seat, second guide ring seat and second oil blanket seat, and the sealing washer setting is in first oil blanket seat and second oil blanket seat, and first experimental hydro-cylinder body is fixed on frame construction 201, and first experimental hydro-cylinder lid is fixed first oil blanket seat and first guide ring seat in the one end of first experimental hydro-cylinder body, and the experimental hydro-cylinder lid of second is fixed second guide ring seat and second oil blanket seat at the other end of first experimental hydro-cylinder body.

In an alternative embodiment, the charging circuit comprises a first pressure valve 26 and a second pressure valve 27, the first or second test cylinder being in communication with one of the feed circuits through the first pressure valve 26 and the first or second test cylinder being in communication with the other feed circuit through the second pressure valve 27. Wherein, the second pressure valve 27 is a proportional pressure valve, and the setting range is 0.5-14 MPa.

In an alternative embodiment, the charging circuit includes a first control valve 29, the first control valve 29 being disposed between the first pressure valve 29 and the drive assembly 13 for controlling the ram speed of the drive ram on the drive assembly 13. The first control valve 29 is a proportional direction valve to control the speed of the driving oil cylinder within the range of 0-500 mm/s, so that the purpose of safety monitoring is achieved.

In an alternative embodiment, the loading circuit comprises a second control valve 30, the second control valve 30 being arranged between the testing device 100 and the first pressure valve 29 and the second pressure valve 30 for controlling the test pressure of the testing device 100.

In an alternative embodiment, the charging circuit further comprises a boost cylinder 31, the boost cylinder 31 being arranged between the second control valve 30 and the first and second test cylinders.

In an alternative embodiment, the charging circuit comprises a third control valve 32, the third control valve 32 being connected between the first or second test cylinder and the tank 21.

In an alternative embodiment, the charging circuit comprises a sequence valve 28, the sequence valve 28 being arranged between the second control valve 30 and the second pressure valve 27.

In an optional embodiment, a first sensor and a second sensor are arranged on the test assembly, and the first sensor and the second sensor are correspondingly arranged on the first test oil cylinder and the second test oil cylinder.

Illustratively, the first sensor and the second sensor both include a pressure sensor 15 and a temperature sensor 16, and the pressure sensor 15 and the temperature sensor 16 are correspondingly installed on both sides of the first test cylinder and both sides of the second test cylinder.

Specifically, the number of the motors 25 and the number of the oil pumps 24 are two, when the two motors 25 are started, the first pressure valve 26 works to raise the oil temperature and heat the first test oil cylinder and the second test oil cylinder to a set value required by a test, then the first pressure valve 26 stops working, and when the test oil temperature exceeds the upper limit of the set value, the water inlet valve on the heat exchanger 22 is opened to stabilize the oil temperature within the set range.

The third control valve 32 and the second pressure valve 27 operate, the loop pressures of the first test cylinder and the second test cylinder increase to the set value of the sequence valve 28, the driving cylinder of the driving assembly 13 operates, the pressure of the driving cylinder increases to the set value of the test, and the driving cylinder and the first pressure valve 26 operate to control the piston rod of the driving cylinder to drive the movable rods of the first test cylinder and the second test cylinder to move forward. When the movable rods of the first test oil cylinder and the second test oil cylinder move to reach the set positions, the second pressure valve 27 and the third control valve 32 stop working, the piston of the pressurization oil cylinder 31 returns to the original position, the pressure of the first test oil cylinder and the pressure of the second test oil cylinder are reduced to 0, the piston rod of the driving oil cylinder drives the movable rods of the first test oil cylinder and the second test oil cylinder to return to the original position, the first pressure valve 26 and the second pressure valve 27 stop working, and the action process is repeatedly circulated in the next test.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The above disclosure provides many different embodiments, or examples, for implementing different features of the invention. The components and arrangements of the specific examples are described above to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., 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 invention. In this specification, schematic representations of the above terms do not necessarily 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.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.