Valve sealing life testing device convenient for replacing sealing ring

Abstract

The invention provides a valve sealing life testing device convenient for replacing a sealing ring, which comprises a sealing ring replacing device, a sealing ring life testing device and a hydraulic station system, and is characterized in that the sealing ring replacing device comprises a frame structure, a driving mechanism, a lifting mechanism and an actuator, the driving mechanism is connected with the lifting mechanism, and the actuator is connected to the lifting mechanism; the sealing ring service life testing device comprises a transition flange, a valve body, a sealing ring gland, a sealing ring, a valve rod and a valve disc, the valve rod is connected with the valve disc, the sealing ring gland is connected to the valve body, and the sealing ring is located between the valve rod and the valve body. The transition flange is connected with the actuator and the valve body; and the hydraulic station system is connected with the actuator and the valve disc through a hydraulic station pipeline. The device is simple in structure and convenient to maintain, the speed of replacing the sealing ring can be greatly increased, the device has the testing function suitable for various working conditions, simulation of abrasion and the service life of the sealing ring under different working conditions is achieved by adjusting operation parameters of a hydraulic station, and then the experiment accuracy and authenticity are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of seal detection, and in particular to a valve seal life test device which is convenient for replacing a seal ring. Background Art

[0002] Life test is a method to study the life characteristics of products and is one of the most important items in reliability testing. It is to place the product under specific test conditions to examine the law of its failure change over time.

[0003] General factory pressure tests of valves and inspections of the dimensional accuracy and finish of parts cannot fully measure the inherent quality problems of valve products. Valve seal life tests can provide a realistic basis for the maintainability and reliability design of valves, and provide a direction for valve design optimization and process improvement.

[0004] In the valve stem seal of the rotary valve, the sealing ring seal is a traditional structure. With its low cost and excellent sealing effect, it is one of the most commonly used sealing methods. Therefore, the design of the sealing ring wear test device for this type of valve is particularly important. After investigation, it is found that most of the existing test benches are horizontal, and the sealing ring is partially affected by the gravity of the valve stem, which does not conform to the actual working conditions, and the wear failure form of the sealing ring is also not in line with the actual conditions, and the applicable working conditions are single; secondly, when testing sealing rings of different structures and different materials, it is necessary to frequently disassemble and assemble the sealing ring, and the key structures such as keyways are not in line with the standards, which is difficult to install, seriously affecting the efficiency and accuracy of the test. Therefore, there is an urgent need for a new test equipment that can facilitate the disassembly and assembly of the sealing ring and can adapt to a variety of working conditions, so as to improve the test efficiency and further improve the accuracy of the sealing test. Summary of the invention

[0005] According to the technical problems raised above, a valve seal life test device is provided for facilitating the replacement of seal rings. The present invention can prevent the seal ring from being affected by the gravity of the valve stem, which affects the normal failure mode of the seal ring; at the same time, it can meet the needs of various working conditions; secondly, in order to test seal rings of different structures and different materials, key structures such as keyways are required to facilitate installation during the replacement of the seal ring, thereby improving the efficiency and accuracy of the test.

[0006] The technical means adopted by the present invention are as follows:

[0007] A valve seal life test device for facilitating replacement of a seal ring, comprising: a seal ring replacement device, a seal ring life test device and a hydraulic station system, wherein the seal ring replacement device comprises a frame structure, a driving mechanism, a lifting mechanism and an actuator, wherein the driving mechanism is mounted on the frame structure, the driving mechanism is connected to the lifting mechanism, and the actuator is connected to the lifting mechanism;

[0008] The sealing ring life test device comprises a valve and a transition flange, wherein the valve comprises a valve body, a sealing ring gland, a sealing ring, a valve stem and a valve disc, wherein the valve stem and the valve disc are coaxially connected in the valve body, the sealing ring gland is coaxially connected above the valve body, the sealing ring is located between the valve stem and the valve body, is in an interference state, and is axially compressed by the sealing ring gland; the upper part of the transition flange is connected to the actuator, and the lower part is detachably coaxially connected to the upper part of the valve body, and the lifting mechanism is used to drive the actuator to lift and lower with the transition flange;

[0009] The hydraulic station system is connected to the actuator and the valve disc through the hydraulic station pipeline, and is used to input a certain pressure medium to the valve disc and provide power to the actuator so that the actuator controls the opening and closing of the valve disc.

[0010] Furthermore, the lifting mechanism includes four screw lifts, four lifting platforms, a left actuator pallet and a right actuator pallet, the four screw lifts are all connected to the driving mechanism and are distributed in four corners, the four screw lifts are respectively the first screw lift, the third screw lift, the fourth screw lift and the second screw lift, the first screw lift and the third screw lift are located on the left, the fourth screw lift and the second screw lift are located on the right, each screw lift is connected to a lifting platform, the left actuator pallet is installed on the two lifting platforms on the left, the right actuator pallet is installed on the two lifting platforms on the right, and the two sides of the actuator are connected to the left actuator pallet and the right actuator pallet.

[0011] Furthermore, it also includes a limit baffle, and at least two limit baffles are respectively arranged on the left actuator support plate and the right actuator support plate, and the limit baffles are arranged at the front and rear of the left side and the front and rear of the right side of the actuator.

[0012] Further, the driving mechanism includes a motor, a first coupling, a second spiral bevel gear steering gear, a second coupling, a third coupling, a first power transmission shaft, a fifth coupling, a first spiral bevel gear steering gear, a third spiral bevel gear steering gear, a sixth coupling, a seventh coupling, a second power transmission shaft, an eighth coupling, a ninth coupling and a tenth coupling, the motor is mounted on the frame structure, and the motor is connected to the first spiral bevel gear steering gear through the first coupling;

[0013] One side of the first spiral bevel gear steering gear is connected to the second spiral bevel gear steering gear through a fifth coupling, the second spiral bevel gear steering gear is connected to the first screw lift through a second coupling, and the first screw lift is connected to the second screw lift through a third coupling, a first force transmission shaft, and a tenth coupling in sequence;

[0014] The other side of the first spiral bevel gear steering gear is connected to the third spiral bevel gear steering gear through the ninth coupling, the third spiral bevel gear steering gear is connected to the third screw lift through the sixth coupling, and the third screw lift is connected to the fourth screw lift through the seventh coupling, the second force transmission shaft and the eighth coupling in sequence.

[0015] Furthermore, the valve stem is connected to a rotary encoder via a fourth coupling, the rotary encoder is mounted on a rotary encoder bracket, the rotary encoder bracket is mounted on an actuator, the rotary encoder is connected to a signal collector, and the signal collector is connected to a computer terminal.

[0016] Furthermore, the sealing ring gland is coaxially connected to the valve body through nuts III and stud bolts, the transition flange is connected to the valve body through nuts II and bolts, and the transition flange is connected to the actuator through bolts II.

[0017] Furthermore, the hydraulic station system includes an actuator hydraulic station and a pipeline hydraulic station, the actuator hydraulic station is connected to the actuator through a hydraulic station pipeline, the pipeline hydraulic station is connected to the valve disc through a pipeline system, and the pipeline system is installed on the frame structure.

[0018] Further, the liquid pipeline system includes a first pipeline flange, a plurality of nuts I, a plurality of bolts I, a first pipeline, a pipeline support, a second pipeline, and a second pipeline flange, wherein the first pipeline and the second pipeline are respectively installed on the frame structure through the pipeline support, and the pipeline hydraulic station is respectively connected to the first pipeline flange and the second pipeline flange through the hydraulic station pipeline, so as to input a certain pressure medium to the valve disc;

[0019] The first pipe flange is connected to the first pipe through nut I and bolt I, the first pipe is connected to the valve body through nut I and bolt I, the valve body is connected to the second pipe through nut I and bolt I, and the second pipe is connected to the second pipe flange through nut I and bolt I.

[0020] Furthermore, a plurality of left-side pressure sensors are evenly distributed in the circumferential direction of the first pipeline, and a plurality of right-side pressure sensors are evenly distributed in the circumferential direction of the second pipeline, and both the right-side pressure sensors and the left-side pressure sensors are connected to a signal collector.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The valve seal life test device for facilitating the replacement of the sealing ring provided by the present invention is a vertical test bench, which can better overcome the influence of the deadweight of the valve stem on the sealing ring and can more accurately simulate the real working environment. The elevator of the test bench simplifies the replacement of the sealing ring and eliminates the tedious disassembly and assembly procedures. In addition, the key parts (such as keyways, etc.) in the device are always fixed in appropriate positions, which greatly improves the efficiency of disassembly.

[0023] On this basis, the test bench also has test functions suitable for various working conditions. By adjusting the operating parameters of the hydraulic station, the wear and service life of the sealing ring under different working conditions can be simulated, thereby obtaining more complete wear data. The hydraulic station parameter setting of the actuator can be tested at different speeds and opening and closing angles, and a rotary encoder is used for feedback to achieve precise angle and speed control, and to simulate the working state of 0-30°, 0-60°, and 0-90, which is convenient for in-depth research on the working characteristics of valves at various angles. At the same time, the test equipment can also record the number of times the valve is opened and closed in real time, and feed back the test results to the computer through the rotary encoder, which can automatically shut down within the specified number of times, thereby improving the degree of automation of the test.

[0024] Based on the above reasons, the present invention can be widely promoted in the fields of seal life testing and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 This is the front view of the test device assembly diagram of the present invention.

[0027] Figure 2 This is a top view of the test device assembly diagram of the present invention (without the hydraulic station).

[0028] Figure 3 This is an assembly diagram of the valve of the present invention.

[0029] Figure 4 This is a partial enlarged view of the sealing ring assembly of the present invention.

[0030] Figure 5 This is a diagram of the actuator separation of the present invention.

[0031] Figure 6 This is an axonometric view of the fourth coupling of the present invention.

[0032] Figure 7 This is an axonometric view of the encoder bracket of the present invention.

[0033] Figure 8 This is an axonometric view of the limit baffle of the present invention.

[0034] Fig. 9 This is an axonometric view of the lifting platform of the present invention.

[0035] Fig.10 This is an axonometric view of the left actuator support plate of the present invention.

[0036] Fig.11 This is an axonometric view of the right actuator support plate of the present invention.

[0037] Fig.12 It is an axonometric view of the force transmission shaft of the present invention.

[0038] Fig.13 This is an axonometric view of the first coupling of the present invention.

[0039] Fig.14 It is an axonometric view of the fifth coupling of the present invention.

[0040] Fig.15 This is an axonometric view of the second coupling of the present invention.

[0041] Fig.16 This is an axonometric view of the third coupling of the present invention.

[0042] Fig.17 This is the axonometric view of the pipeline flange of the present invention.

[0043] Fig.18 This is an axonometric drawing of the pipeline of the present invention.

[0044] Fig.19 This is an axonometric view of the pipeline support of the present invention.

[0045] Fig. 20 This is an axonometric drawing of the aluminum profile of the present invention (the aluminum profiles in each assembly drawing are drawn in a simplified manner).

[0046] Fig.21 This is an axonometric view of the rotary encoder of the present invention.

[0047] Fig. 22 This is an axonometric diagram of the pressure sensor of the present invention.

[0048] Fig.23 It is an axonometric view of the spiral bevel gear steering gear of the present invention.

[0049] Fig.24 It is an axonometric view of the screw lift of the present invention.

[0050] In the figure: 1. Actuator hydraulic station; 2. Motor; 3. First coupling; 4. Second spiral bevel gear steering gear; 5. Second coupling; 6. First screw lift; 7. Lifting platform; 8. Left actuator support plate; 9. Limit baffle; 10. Actuator; 11. Third coupling; 12. First force transmission shaft; 13. Rotary encoder; 14. Rotary encoder bracket; 15. Fourth coupling; 16. Pipeline hydraulic station; 17. Signal collector; 18. Computer terminal; 19. First pipeline flange; 20. Nut I; 21. Bolt I; 22. First pipeline; 23. Pipe bracket; 24. Transition flange; 25. Nut II; 26. Valve body; 27. Second pipeline 1. The second pipe flange; 2. The fifth coupling; 3. The first spiral bevel gear steering gear; 3. The third spiral bevel gear steering gear; 3. The sixth coupling; 3. The third screw lifter; 3. The seventh coupling; 3. The second force transmission shaft; 3. The eighth coupling; 4. The fourth screw lifter; 4. The ninth coupling; 4. The left pressure sensor; 4. The tenth coupling; 4. The right actuator support plate; 4. The second screw lifter; 4. The nut III; 4. The sealing ring gland; 4. The stud bolt; 4. The sealing ring; 5. The valve stem; 5. The valve disc. DETAILED DESCRIPTION

[0051] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0052] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0054] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be clear that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0055] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0056] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0057] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0058] The present invention provides a valve seal life test device that is convenient for replacing seals, and belongs to the field of advanced manufacturing technology. The present invention can prevent the seal from being affected by the gravity of the valve stem, which affects the normal failure form of the seal; at the same time, it can meet the needs of various working conditions; secondly, in order to test seals with different structures and different materials, key structures such as keyways are required to facilitate installation during the replacement of the seals, so as to improve the efficiency and accuracy of the test. The present invention has a simple structure and is easy to maintain, and can greatly improve the speed of replacing the seal. The test bench also has a test function suitable for various working conditions. By adjusting the operating parameters of the hydraulic station, the wear and service life of the seal under different working conditions can be simulated, thereby improving the accuracy and authenticity of the experiment.

[0059] The present invention discloses a valve seal life test device that is convenient for replacing seals, comprising a seal replacement device, a seal life test device, and a hydraulic station system. The seal replacement device is installed at the top of a frame structure made of aluminum profiles, and the lifting platform for replacing the seal and the limit baffle limit the threaded connection and limit the four degrees of freedom of the actuator, and the actuator is installed at the upper end of the valve body; when the actuator is disconnected from the valve body, the rotational motion generated by the motor of the device is transmitted to the screw lift through the steering gear and the coupling and converts the rotational motion into vertical movement of the lifting platform, so that the actuator separates the valve body, thereby facilitating the replacement of the seal and avoiding reassembly. The pipeline hydraulic station provides pipeline pressure through the hydraulic pipeline to simulate the actual working conditions; and the actuator hydraulic station indirectly controls the opening and closing state of the valve by controlling the actuator. At the same time, the rotary encoder coaxially connected to the valve continuously measures the valve angle and rotation speed, which is used for seal wear and life experiments, thereby obtaining more complete wear data.

[0060] Replace the sealing ring device such as Figure 1 As shown, it includes a frame structure (composed of multiple aluminum profiles 30), a motor 2, a first coupling 3, a second spiral bevel gear steering gear 4, a second coupling 5, a first screw lift 6, four lifting platforms 7, a left actuator support plate 8, a limit baffle 9, an actuator 10, a third coupling 11, a first force transmission shaft 12, a fifth coupling 32, a first spiral bevel gear steering gear 33, a third spiral bevel gear steering gear 34, a sixth coupling 35, a third screw lift 36, a seventh coupling 37, a second force transmission shaft 38, an eighth coupling 39, a fourth screw lift 40, a ninth coupling 41, a tenth coupling 43, a right actuator support plate 44, and a second screw lift 45.

[0061] The device is provided with torque and power by the motor 2, the motor 2 is connected to the first spiral bevel gear steering gear 33 through the first coupling 3, the first spiral bevel gear steering gear 33 is connected to the second spiral bevel gear steering gear 4 through the fifth coupling 32, the steering gear is connected to the first screw lift 6 through the second coupling 5, so that the torque and power are transmitted to the first screw lift 6, the first screw lift 6 is then connected to the second screw lift 45 through the third coupling 11, the first force transmission shaft 12, and the tenth coupling 43 in sequence, so that the torque and power are transmitted to the second screw lift 45; similarly, the first spiral bevel gear connected to the motor 2 through the first coupling 3 on the other side The gear steering gear 33 is connected to the third spiral bevel gear steering gear 34 through the ninth coupling 41, and the steering gear is connected to the third screw lift 36 through the sixth coupling 35, so that the torque and power are transmitted to the third screw lift 36, and the third screw lift 36 is then connected to the fourth screw lift 40 through the seventh coupling 37, the second force transmission shaft 38, and the eighth coupling 39 in sequence, so that the power is transmitted to the fourth screw lift 40; the rotational motion of each screw lift is converted into the linear motion of each lifting platform 7, and the four identical lifting platforms 7 are respectively threadedly connected with the four screw lifts and the left actuator support plate 8 and the right actuator support plate 44. The left actuator support plate 8 is threadedly connected with the two limit baffles 9 on the left, which are respectively located at the lower left and the left front and rear sides of the actuator 10. The right actuator support plate 44 is threadedly connected with the two limit baffles 9 on the right, which are respectively located at the lower right and the right front and rear sides of the actuator 10. The actuator 10, the transition flange 24, and the valve body 26 are coaxially threadedly connected. The upper part of the transition flange 24 is connected to the actuator 10 by an M14 hexagonal bolt II 29, and the lower part is detachably coaxially connected to the valve body 26 by a nut II 25 and a bolt.

[0062] Replacing the sealing ring process: At this time, all components are integrated. If the sealing ring needs to be replaced, the actuator hydraulic station 1, the pipeline hydraulic station 16, the actuator 10, etc. stop working. At the same time, the four M14 hexagonal nuts II 25 are manually removed to release the threaded connection between the transition flange 24 and the valve body 26. The connection between the fourth coupling 15 and the valve stem 50 is removed. Then, the motor 2 can be used to drive the screw lifts to work synchronously. The four lifting platforms 7 rise at the same time. The left actuator support plate 8 and the right actuator support plate 44 lift the actuator 10 to a suitable height. At the same time, the four limit baffles 9 limit the rolling of the actuator 10, so that the actuator 10 is separated from the valve body 26 with the transition flange 24. Figure 5 , and then Figure 3In the process, it is necessary to disassemble the M25 hexagonal nut III 46 and the sealing ring gland 47, and then use special tools to disassemble the sealing ring after the wear test, so as to measure key data such as the surface roughness and wear depth of the sealing ring. After replacing the sealing ring, reinstall the M25 hexagonal nut III 46 and the sealing ring gland 47. Since the other parts maintain the original assembly corresponding position relationship, it is only necessary to reverse the motor 2, lower the separated part back to the original installation position, reinstall the M14 hexagonal nut II 25, and reconnect the fourth coupling 15 with the valve stem 50, and the valve body part can be quickly reassembled. This design significantly improves the efficiency of sealing ring replacement and saves a lot of experimental time, thereby improving the convenience and economy of the overall testing process.

[0063] The sealing ring life test device includes: a valve and a transition flange 24, the valve includes a valve body 26, a sealing ring gland 47, a sealing ring 49, a valve stem 50, a valve disc 51, a rotary encoder 13, a rotary encoder bracket 14, a signal collector 17, and a computer terminal 18.

[0064] In the sealing ring life test device: the valve stem 50 is connected to the rotary encoder 13 through the fourth coupling 15, the rotary encoder 13 is connected to the actuator 10 through the rotary encoder bracket 14, the sealing ring gland 47 is coaxially connected to the valve body 26 through the M25 hexagonal nut III 46 and the stud bolt 48, the sealing ring 49 is located between the valve stem 50 and the valve body 26, in an interference state, and is axially pressed by the sealing ring gland 47; the valve stem 50 is coaxially connected to the valve disc 51. The signal collector 17 is connected to the rotary encoder 13, collects the speed, rotation angle, valve cover opening and closing times and other information fed back by the rotary encoder 13 in real time, and uploads it to the computer terminal 18 (PC terminal); the required valve cover opening and closing times can also be set on the computer 18. When the number of times fed back by the rotary encoder 13 reaches the set value, the computer 18 automatically closes the test bench.

[0065] The hydraulic station system includes an actuator hydraulic station 1, a pipeline hydraulic station 16, a first pipeline flange 19, a plurality of nuts I 20, a plurality of bolts I 21, a first pipeline 22, a pipeline bracket 23, a second pipeline 27, a second pipeline flange 31, a left pressure sensor 42, and a right pressure sensor 28. The first pipeline 22 and the second pipeline 27 are respectively installed on the frame structure through the pipeline bracket 23.

[0066] In the hydraulic station system: the pipeline hydraulic station 16 is connected to the first pipeline flange 19 and the second pipeline flange 31 through the hydraulic station pipeline, so as to input a certain pressure medium to the valve disc 51; the actuator hydraulic station 1 provides power to the actuator 10 through the hydraulic station pipeline, so that the actuator 10 can successfully control the opening and closing of the valve disc 51; by setting the parameters of the actuator hydraulic station 1, the rotation speed and rotation angle of the valve stem 50 are indirectly controlled, so that the wear or life test of the sealing ring 49 at different rotation speeds and different opening and closing angles can be carried out, and the pipeline working condition can also be changed through the pipeline hydraulic station 16, that is, the pipeline input pressure is changed, so as to test the wear or life of the sealing ring under different pipeline pressures; wherein the opening and closing angle and the rotation speed of the valve disc 51 are indirectly set by the actuator hydraulic station 1 controlling the valve stem 50, and multi-angle parameter settings such as 0-30°, 0-60° or 0-90° can be realized. The first pipe flange 19 and the first pipe 22, the first pipe 22 and the valve body 26, the valve body 26 and the second pipe 27, and the second pipe 27 and the second pipe flange 31 are all connected by M26 hexagonal nuts Ⅰ20 and M26 hexagonal bolts Ⅰ21; four left-side pressure sensors 42 and four right-side pressure sensors 28 are evenly distributed in the circumferential direction of the first pipe 22 and the second pipe 27, respectively, for collecting the pressure conditions in the pipes, collecting them to the signal collector 17, and feeding them back to the computer terminal 18.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A valve seal life test device that is convenient for replacing seal rings, characterized in that: include: A sealing ring replacement device, a sealing ring life test device and a hydraulic station system, wherein the sealing ring replacement device comprises a frame structure, a driving mechanism, a lifting mechanism and an actuator (10), wherein the driving mechanism is mounted on the frame structure, the driving mechanism is connected to the lifting mechanism, and the actuator (10) is connected to the lifting mechanism; The sealing ring life test device comprises a valve and a transition flange (24), wherein the valve comprises a valve body (26), a sealing ring gland (47), a sealing ring (49), a valve stem (50) and a valve disc (51), wherein the valve stem (50) and the valve disc (51) are coaxially connected in the valve body (26), the sealing ring gland (47) is coaxially connected above the valve body (26), the sealing ring (49) is located between the valve stem (50) and the valve body (26), is in an interference state, and is axially compressed by the sealing ring gland (47); the upper part of the transition flange (24) is connected to the actuator (10), and the lower part is detachably coaxially connected to the upper part of the valve body (26), and the lifting mechanism is used to drive the actuator (10) to lift and lower with the transition flange (24); The hydraulic station system is connected to the actuator (10) and the valve disc (51) respectively through the hydraulic station pipeline, and is used to input a certain pressure medium to the valve disc (51) and provide power to the actuator (10), so that the actuator (10) controls the opening and closing of the valve disc (51).

2. The valve seal life test device for facilitating replacement of the seal ring according to claim 1, characterized in that: The lifting mechanism comprises four screw lifts, four lifting platforms (7), a left actuator support plate (8) and a right actuator support plate (44). The four screw lifts are all connected to the driving mechanism and are distributed in four corners. The four screw lifts are respectively a first screw lift (6), a third screw lift (36), a fourth screw lift (40) and a second screw lift (45). The first screw lift (6) and the third screw lift (36) are located on the left side, the fourth screw lift (40) and the second screw lift (45) are located on the right side, and each screw lift is connected to a lifting platform (7). The left actuator support plate (8) is installed on the two lifting platforms (7) on the left side, and the right actuator support plate (44) is installed on the two lifting platforms (7) on the right side. The two sides of the actuator (10) are connected to the left actuator support plate (8) and the right actuator support plate (44).

3. The valve seal life test device for facilitating replacement of the seal ring according to claim 2, characterized in that: It also includes a limit baffle (9), at least two limit baffles (9) are respectively provided on the left actuator support plate (8) and the right actuator support plate (44), and the limit baffles (9) are arranged at the front and rear of the left side and the front and rear of the right side of the actuator (10).

4. The valve seal life test device for facilitating replacement of the seal ring according to claim 2, characterized in that: The driving mechanism comprises a motor (2), a first coupling (3), a second spiral bevel gear steering gear (4), a second coupling (5), a third coupling (11), a first force transmission shaft (12), a fifth coupling (32), a first spiral bevel gear steering gear (33), a third spiral bevel gear steering gear (34), a sixth coupling (35), a seventh coupling (37), a second force transmission shaft (38), an eighth coupling (39), a ninth coupling (41) and a tenth coupling (43); the motor (2) is mounted on a frame structure, and the motor (2) is connected to the first spiral bevel gear steering gear (33) via the first coupling (3); One side of the first spiral bevel gear steering gear (33) is connected to the second spiral bevel gear steering gear (4) through a fifth coupling (32); the second spiral bevel gear steering gear (4) is connected to the first screw lift (6) through a second coupling (5); the first screw lift (6) is connected to the second screw lift (45) through a third coupling (11), a first force transmission shaft (12), and a tenth coupling (43) in sequence; The other side of the first spiral bevel gear steering gear (33) is connected to the third spiral bevel gear steering gear (34) through a ninth coupling (41); the third spiral bevel gear steering gear (34) is connected to the third screw lift (36) through a sixth coupling (35); the third screw lift (36) is connected to the fourth screw lift (40) through a seventh coupling (37), a second force transmission shaft (38), and an eighth coupling (39) in sequence.

5. The valve seal life test device for facilitating replacement of seal rings according to claim 1, characterized in that: The valve stem (50) is connected to a rotary encoder (13) via a fourth coupling (15); the rotary encoder (13) is mounted on a rotary encoder bracket (14); the rotary encoder bracket (14) is mounted on an actuator (10); the rotary encoder (13) is connected to a signal collector (17); and the signal collector (17) is connected to a computer terminal (18).

6. The valve seal life test device for facilitating replacement of seal rings according to claim 1, characterized in that: The sealing ring gland (47) is coaxially connected to the valve body (26) via a nut III (46) and a stud bolt (48), the transition flange (24) is connected to the valve body (26) via a nut II (25) and a bolt, and the transition flange (24) is connected to the actuator (10) via a bolt II (29).

7. The valve seal life test device for facilitating replacement of seal rings according to claim 1, characterized in that: The hydraulic station system comprises an actuator hydraulic station (1) and a pipeline hydraulic station (16); the actuator hydraulic station (1) is connected to the actuator (10) via a hydraulic station pipeline; the pipeline hydraulic station (16) is connected to the valve disc (51) via a pipeline system; and the pipeline system is installed on a frame structure.

8. The valve seal life test device for facilitating replacement of seal rings according to claim 7, characterized in that: The liquid pipeline system comprises a first pipeline flange (19), a plurality of nuts I (20), a plurality of bolts I (21), a first pipeline (22), a pipeline support (23), a second pipeline (27), and a second pipeline flange (31); the first pipeline (22) and the second pipeline (27) are respectively mounted on the frame structure through the pipeline support (23); the pipeline hydraulic station (16) is respectively connected to the first pipeline flange (19) and the second pipeline flange (31) through the hydraulic station pipeline, so as to input a certain pressure medium to the valve disc (51); The first pipe flange (19) is connected to the first pipe (22) via a nut I (20) and a bolt I (21); the first pipe (22) is connected to the valve body (26) via a nut I (20) and a bolt I (21); the valve body (26) is connected to the second pipe (27) via a nut I (20) and a bolt I (21); the second pipe (27) is connected to the second pipe flange (31) via a nut I (20) and a bolt I (21).

9. The valve seal life test device for facilitating replacement of the seal ring according to claim 8, characterized in that: A plurality of left-side pressure sensors (42) are evenly distributed in the circumferential direction of the first pipeline (22), and a plurality of right-side pressure sensors (28) are evenly distributed in the circumferential direction of the second pipeline (27), and both the right-side pressure sensors (28) and the left-side pressure sensors (42) are connected to the signal collector (17).

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