Liftable replaceable valve filler wear test device

Abstract

The invention provides a liftable replaceable valve filler wear test device, which comprises a supporting device, a valve, a driving device, a lifting device, a wear test device and a hydraulic station system, and is characterized in that the valve comprises a valve body and a valve rod, and a filler is sealed between the upper part of the valve body and the valve rod; the abrasion testing device comprises an actuator and a third connecting flange, the actuator is installed above the supporting device, the lower portion of the actuator is connected with the third connecting flange, and the third connecting flange is connected with the upper portion of the valve body; the hydraulic station system comprises a pipeline system, the hydraulic station system is connected with the actuator through a hydraulic pipeline, the hydraulic station system is connected with the valve body through the pipeline system, and the pipeline system is connected to the lifting device; the driving device and the lifting device are installed on the supporting device, the driving device is connected with the lifting device, and the lifting device is used for driving the pipeline system to drive the valve body to ascend and descend. The influence of the gravity of the valve rod on the filler can be eliminated, and the actual working condition of the valve can be simulated more truly.

Description

Technical Field

[0001] The present invention relates to the technical field of packing wear testing, and in particular to a liftable and replaceable valve packing wear testing device. Background Art

[0002] As a traditional valve stem seal, the packing seal is one of the most commonly used sealing methods due to its low cost and excellent sealing performance. To prevent environmental pollution, resource waste, and safety accidents caused by leakage, the seal structure must have excellent sealing performance and long-term stability. Therefore, packing friction and wear testing is particularly important. A well-developed packing wear test device can provide an important basis for the research and development and improvement of packing seals.

[0003] Most existing packing wear test benches are horizontal in design, which causes the packing to be partially affected by the gravity of the valve stem, which is inconsistent with actual working conditions, and the wear failure mode also deviates from the actual situation. When evaluating packings of different structures and materials, the packing needs to be frequently disassembled and reinstalled, which is a cumbersome and time-consuming process. When replacing the packing, it is often necessary to disassemble a large number of valve components, and when reassembling, the key structures must be precisely adjusted to ensure the sealing performance, which greatly increases the workload and time cost. In addition, many test devices can only simulate wear under specific conditions and fail to fully reflect the complexity of actual working conditions. Therefore, developing a new test device to more realistically simulate the wear process of the packing under actual working conditions is of great significance to improving the efficiency and accuracy of the test. Summary of the Invention

[0004] In response to the aforementioned technical problems, a test device for valve packing wear that can be raised and lowered is provided. This invention primarily utilizes a lifting mechanism that allows the valve body to be raised and lowered as a whole, significantly simplifying the assembly and disassembly process for packing replacement. Furthermore, the test device utilizes a hydraulic station system to precisely control the actuator, simulating the actual operating conditions of the valve. A rotary encoder, working in conjunction with an industrial computer, enables precise testing and control of the valve's opening and closing processes. This design can simulate a variety of complex operating conditions, providing a more realistic and comprehensive testing environment for packing wear testing.

[0005] The technical means adopted in the present invention are as follows:

[0006] A liftable and replaceable valve packing wear test device, comprising: a support device, a valve, a drive device, a lift device, a wear test device, and a hydraulic station system; the valve comprises a valve body and a valve stem connected to the valve body; a packing is sealed between the upper portion of the valve body and the valve stem;

[0007] The wear testing device includes an actuator and a third connecting flange. The actuator is installed above the supporting device. The bottom of the actuator is connected to the third connecting flange. The third connecting flange is detachably coaxially connected to the top of the valve body by bolts.

[0008] The hydraulic station system includes a pipeline system, the hydraulic station system is connected to the actuator through a hydraulic pipeline, the hydraulic station system is connected to the valve body through a pipeline system, and the pipeline system is connected to the lifting device;

[0009] The driving device and the lifting device are both installed on the supporting device. The driving device is connected to the lifting device. The lifting device is used to drive the pipeline system to lift and lower the valve body.

[0010] Furthermore, the lifting device includes two first lifting plates, two second lifting plates, two first screw rods, two second screw rods, two first screw rod boxes and two second screw rod boxes, the two first screw rod boxes and the two second screw rod boxes are distributed in four corners and are all connected to the drive device, wherein one first screw rod box is coaxially arranged with one second screw rod box, another first screw rod box is coaxially arranged with another second screw rod box, and the first screw box and the second screw box on the same side are a group;

[0011] Each of the first screw rods is connected to a first screw rod, and the top of each of the first screw rods is connected to a first lifting plate; each of the second screw rods is connected to a second screw rod, and the top of each of the second screw rods is connected to a second lifting plate; the first screw rod box and the second screw rod box are respectively connected to the first screw rod and the second screw rod to realize the conversion from rotational motion to linear motion; the two first lifting plates are connected to one side of the pipeline system, and the two second lifting plates are connected to the other side of the pipeline system.

[0012] Furthermore, the drive device includes a motor, a first coupling, a first spiral bevel gear steering gear and two sets of transmission mechanisms, the motor is installed on the support device, the output end of the motor is connected to the first spiral bevel gear steering gear through the first coupling, and both sides of the first spiral bevel gear steering gear are connected to a set of transmission mechanisms, and each set of transmission mechanisms is connected to a set of first screw box and second screw box;

[0013] The transmission mechanism includes a second coupling, a first coupling, a third coupling, a second spiral bevel gear steering gear, a fourth coupling, a second coupling, a fourth coupling, a sixth coupling, a third coupling and a seventh coupling. The second coupling, the first coupling, the third coupling and the second spiral bevel gear steering gear are connected in sequence. The second spiral bevel gear steering gear is connected to a first screw box in sequence through the fourth coupling, the second coupling and the fourth coupling. The first screw box is connected to a second screw box in sequence through the sixth coupling, the third coupling and the seventh coupling. The second coupling of each transmission mechanism is connected to the first spiral bevel gear steering gear.

[0014] Furthermore, the hydraulic station system further includes a first hydraulic station and a second hydraulic station, the second hydraulic station is connected to the actuator via a hydraulic pipeline, and the first hydraulic station is connected to the valve body via a pipeline system.

[0015] Furthermore, the pipeline system includes a first ferrule flange, a first connecting flange, a second stud, a second connecting flange, a second ferrule flange, an L-shaped fixing plate and a first stud, the first connecting flange and the second connecting flange are respectively connected to the two sides of the valve body through the first stud, the first connecting flange and the second connecting flange are placed on the L-shaped fixing plate, the L-shaped fixing plate is installed on the supporting device, the first lifting plate and the second lifting plate are respectively connected to the first connecting flange and the second connecting flange through the second stud, and the first lifting plate and the second lifting plate are connected to the first hydraulic station of the hydraulic station system through a hydraulic pipeline.

[0016] Furthermore, a plurality of Hirschmann pressure gauges are installed on each of the first connecting flange and the second connecting flange for monitoring system pressure.

[0017] Furthermore, the wear testing device also includes a first fixed bracket, a rotary encoder, a second fixed bracket and an output shaft, the first fixed bracket is fixed on the actuator, the second fixed bracket is installed on the first fixed bracket, the rotary encoder is connected to the second fixed bracket, and the output shaft of the actuator is connected to the rotary encoder through a snap-on connection.

[0018] Furthermore, a packing gland is connected to the top of the valve body via a nut and a third stud, and the packing gland is pressed against the packing to apply a pre-tightening force to the packing.

[0019] Furthermore, a first L-shaped plate, a first limiting plate, a second limiting plate and a second L-shaped plate are installed above the supporting device, the first L-shaped plate and the second L-shaped plate are connected to the left and right sides of the actuator, and the second L-shaped plate is provided with a slot; there are multiple first limiting plates, which are arranged on the left front and rear sides of the actuator; there are multiple second limiting plates, which are arranged on the right front and rear sides of the actuator.

[0020] Furthermore, it also includes a data acquisition system, which includes a data acquisition card and an industrial computer. The Hirschmann pressure gauge and the rotary encoder are both connected to the data acquisition card, and the data acquisition card is connected to the industrial computer.

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

[0022] The present invention provides a vertical test bench for testing valve packing wear with a liftable, replaceable mechanism. This design eliminates the influence of valve stem gravity on packing, more realistically simulating actual valve operating conditions. The lift function makes packing replacement quick and easy, eliminating the need for complex disassembly and reassembly. Key features such as keyways are always maintained at the correct installation angle, further improving assembly and disassembly efficiency.

[0023] 2. The present invention is capable of performing variable operating condition testing. By adjusting the hydraulic station parameters, it can simulate packing wear and life testing under different pipeline pressures, providing more comprehensive wear data. The actuator's hydraulic station parameter settings allow testing at different speeds and opening and closing angles. Precise angle and speed control is achieved through rotary encoder feedback, enabling the test device to simulate operating conditions at different opening and closing angles, such as 0-30°, 0-60°, and 0-90°, allowing for in-depth research on valve performance at different angles. Furthermore, the test device can count the number of valve openings and closings in real time, using rotary encoder feedback to the computer to automatically stop the test after a set number of times, thereby enhancing the automation of the test.

[0024] Based on the above reasons, the present invention can be widely promoted in fields such as filler wear testing. 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative labor.

[0026] Figure 1 It is an assembly diagram of the overall device of the present invention.

[0027] Figure 2 It is an assembly drawing of the lifting device of the present invention.

[0028] Figure 3 This is a diagram of the valve separation when replacing the packing of the present invention.

[0029] Figure 4 This is the assembly diagram of the valve packing of the present invention.

[0030] Figure 5Schematic diagram of the structure of the device of the present invention (excluding the hydraulic station), wherein (a) is an axonometric view, (b) is a left view, (c) is a right view, and (d) is a top view.

[0031] Figure 6 This is an axonometric view of the rotary encoder of the present invention.

[0032] Figure 7 This is the axonometric view of the first coupling of the present invention.

[0033] Figure 8 This is the axonometric view of the second coupling of the present invention.

[0034] Figure 9 This is the axonometric view of the first fixed bracket of the present invention.

[0035] Figure 10 This is an axonometric view of the second fixing bracket of the present invention.

[0036] Figure 11 This is an axonometric view of the lifting plate of the present invention.

[0037] Figure 12 This is an axonometric view of the L-shaped restriction plate of the present invention.

[0038] Figure 13 This is an axonometric view of the L-shaped fixing plate of the present invention.

[0039] Figure 14 This is an axonometric view of the spiral bevel gear steering gear of the present invention.

[0040] Figure 15 This is an axonometric view of the screw box of the present invention.

[0041] Figure 16 This is an axonometric view of the screw rod of the present invention.

[0042] Figure 17 This is an axonometric view of the motor of the present invention.

[0043] Figure 18 This is the front view of the second hydraulic station of the present invention.

[0044] Figure 19 This is the front view of the first hydraulic station of the present invention.

[0045] In the figure: 1. Frame; 2. First ferrule flange; 3. First connecting flange; 4. Second stud bolt; 5. First lifting plate; 6. Hirschmann pressure gauge; 7. First L-shaped plate; 8. First limit plate; 9. Actuator; 10. First fixing bracket; 11. Rotary encoder; 12. Second fixing bracket; 13. Output shaft; 14. Third connecting flange; 15. Second limit plate; 16. Second L-shaped plate; 17. Bolt; 18. Second lifting plate; 19. Second connecting flange; 20. Second ferrule flange; 21. Second screw rod; 22. L-shaped fixing plate; 23. First hydraulic station; 24. Valve body; 25. First double First stud; 26. First screw rod; 27. Second hydraulic station; 28. Data acquisition card; 29. ​​Industrial computer; 30. Motor; 31. First coupling; 32. First spiral bevel gear steering gear; 33. Second coupling; 34. First connecting shaft; 35. Third coupling; 36. Second spiral bevel gear steering gear; 37. Fourth coupling; 38. Second connecting shaft; 39. Fourth coupling; 40. First screw box; 41. Sixth coupling; 42. Third connecting shaft; 43. Seventh coupling; 44. Second screw box; 45. Nut; 46. Valve stem; 47. Third stud; 48. Packing gland; 49. Packing. DETAILED DESCRIPTION

[0046] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention 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.

[0047] 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 in no way 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 making creative work are within the scope of protection of the present invention.

[0048] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0049] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, 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 actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods 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 the exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0050] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying 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 outline of each component itself.

[0051] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. 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 figures. For example, if the device in the 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.

[0052] 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. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0053] The present invention provides a liftable and replaceable valve packing wear test device. This device is a vertical liftable device that facilitates packing replacement and is used for testing valve wear and life. It relates to packing wear performance testing equipment. The device primarily comprises a support device, a valve, a drive device, a lift device, a wear test device, and a hydraulic station system. The valve comprises a valve body 24 and a valve stem 46 connected within the valve body 24. A packing 49 is sealed between the upper portion of the valve body 24 and the valve stem 46. The support device comprises a frame 1. An actuator 9 is mounted above the frame 1. The lower portion of the actuator 9 is connected to a third connecting flange 14, which is removably and coaxially connected to the upper portion of the valve body 24 via bolts 17. The lift device is connected to the valve body 24, enabling the entire valve body 24 to move up and down through its lift function. This greatly simplifies the assembly and disassembly steps for the valve packing during testing. This design significantly improves testing efficiency and reduces operational difficulty. The wear test device, comprising the actuator 9, is the primary experimental component used to conduct in-depth research on valve wear and expected service life. This wear test device can provide accurate data for evaluating valve performance and durability. The hydraulic station system is used to drive the actuator 9 and simulate the actual working conditions of the valve pipeline, providing the necessary conditions for research and testing of valve wear and life. By precisely controlling the movement of the actuator 9, the system can simulate various working conditions of the valve in actual use.

[0054] like Figure 1 The test device of the present invention mainly includes a frame 1, a first ferrule flange 2, a first connecting flange 3, a second stud 4, two first lifting plates 5, a Hirschmann pressure gauge 6, a first L-shaped plate 7, a first limit plate 8, an actuator 9, a first fixing bracket 10, a second fixing bracket 12, a rotary encoder 11, an output shaft 13, a third connecting flange 14, a second limit plate 15, a second L-shaped plate 16, bolts 17, two second lifting plates 18, a second connecting flange 19, a second ferrule flange 20, two second screw rods 21, an L-shaped fixing plate 22, a first hydraulic station 23, a valve body to be tested 24, and a third connecting flange 14. A stud 25, two first screw rods 26, a second hydraulic station 27, a data acquisition card 28, an industrial computer 29, a motor 30, a first coupling 31, a first spiral bevel gear steering gear 32, a second coupling 33, a first connecting shaft 34, a third coupling 35, a second spiral bevel gear steering gear 36, a fourth coupling 37, a second coupling 38, a fourth coupling 39, two first screw rod boxes 40, a sixth coupling 41, a third connecting shaft 42, a seventh coupling 43, two second screw rod boxes 44, a nut 45, a valve stem 46, a third stud 47, a packing gland 48, a packing 49, etc.

[0055] The specific embodiment is as follows: The first and second connecting flanges 3 and 19 are placed on an L-shaped fixing plate 22, which is mounted on the frame 1. The valve body 24 to be tested is fixedly connected to the first and second connecting flanges 3 and 19 using first studs 25. Each of the first and second connecting flanges 3 and 19 is equipped with four pressure sensing ports, and eight Hirschmann pressure gauges 6 are mounted on these ports to monitor the system's pressure in real time. When the pressure values ​​displayed by these Hirschmann pressure gauges 6 remain stable with minimal fluctuation, the valve is considered to have reached the desired operating state. The first and second lifting plates 5 and 18 are fixedly connected to the first and second connecting flanges 3 and 19, respectively, to support and move the valve body 24, enabling it to be raised and lowered. The first and second connecting flanges 3 and 19 are connected to the first and second ferrule flanges 2 and 20, respectively, via second studs 4. The first and second connecting flanges 3 and 19 are connected to two hydraulic pipelines of the first hydraulic station 23, while the first and second ferrule flanges 2 and 20 are connected to two hydraulic pipelines of the first hydraulic station 23, respectively. The first screw rod 26 and the second screw rod 21 are respectively connected to the first lifting plate 5 and the second lifting plate 18 by bolts, and the first lifting plate 5 and the second lifting plate 18 are fixed to the first connecting flange 3 and the second connecting flange 19 to drive the valve body 24 to move vertically up and down, and move the valve body 24 to be tested upward to the test position.

[0056] The position of the actuator 9 is controlled by the first and second limit plates 8 and 15, arranged front and rear on the left and right sides, which limit forward and backward movement. The first and second L-shaped plates 7 and 16, respectively, limit left and right movement. The second L-shaped plate 16 has slots to adjust the left-right distance. The first and second L-shaped plates 7 and 16 are connected to the left and right sides of the actuator 9. The first limit plate 8 is arranged on the left front and back sides of the actuator 9, and the second limit plate 15 is arranged on the right front and back sides of the actuator 9. The first fixing bracket 10 is fixed to the actuator 9 with bolts, while the second fixing bracket 12 is connected to the rotary encoder 11. The first and second fixing brackets 10 and 12 are fixedly connected, stably mounting the rotary encoder 11 on the actuator 9. The rotary encoder 11 is connected to the output shaft 13 of the actuator 9 via a snap-fit ​​connection. The output shaft 13 drives the rotary encoder 11 to rotate coaxially. The valve angle data is transmitted to the industrial computer 29 via the data acquisition card 28 for precise monitoring. The two ends of the actuator 9 are respectively connected to the hydraulic station pipeline of the second hydraulic station 27, and the actuator 9 can be rotated by 0-30°, 0-60° or 0-90° through the parameter setting of the second hydraulic station 27. The actuator 9 drives the actuator output shaft 13 to rotate, thereby simulating the opening and closing process of the valve in the actual process and simulating the actual opening and closing action of the valve. At the same time, the second hydraulic station 27 can adjust the rotation speed of the actuator 9 to adapt to the test requirements of different working conditions, thereby improving the experimental efficiency. The rotary encoder 11 rotates coaxially with the actuator output shaft 13. Through the feedback of the rotary encoder 11, the number of times the valve is opened and closed can be counted in real time. The data of the rotary encoder 11 and the Hirschmann pressure gauge 6 will be collected and transmitted to the data acquisition card 28, and the data acquisition card 28 will then integrate the data and transmit it to the industrial computer 29, thereby realizing accurate data acquisition and control.

[0057] The first hydraulic station 23 is connected to the first and second ferrule flanges 2 and 20 via hydraulic piping. It is responsible for delivering a pressured medium to the valve and uses a Hirschmann pressure gauge 6 to monitor the fluid pressure in the hydraulic piping in real time to ensure accurate pressure control. The second hydraulic station 27 is connected to both ends of the actuator 9 via hydraulic station piping, achieving precise control of the actuator through hydraulic drive.

[0058] like Figure 2The figure shows the assembly diagram of the drive unit and lifting device. The drive unit and lifting device include a motor 30 mounted on the frame 1, a first coupling 31, a second coupling 33, a third coupling 35, a fourth coupling 37, a fourth coupling 39, a sixth coupling 41, a seventh coupling 43, a first spiral bevel gear steering gear 32, a second spiral bevel gear steering gear 36, a first connecting shaft 34, a second coupling 38, a third connecting shaft 42, two first screw boxes 40, and two second screw boxes 44. The second coupling 33, first connecting shaft 34, third coupling 35, second spiral bevel gear steering gear 36, fourth coupling 37, second coupling 38, fourth coupling 39, sixth coupling 41, third coupling 42, and seventh coupling 43 constitute the transmission mechanism, which consists of two sets. The two first screw boxes 40 and two second screw boxes 44 are arranged at the four corners.

[0059] The motor 30 is connected to the first spiral bevel gear steering gear 32 via a first coupling 31. The first coupling 31 is designed with two keyways, one end of which is connected to the motor shaft; the other end cooperates with the main shaft of the first spiral bevel gear steering gear 32 to achieve a 90-degree shift in power direction. The second coupling 33 of each transmission mechanism is connected to the first spiral bevel gear steering gear 32. The side shafts on both sides of the first spiral bevel gear steering gear 32 are connected to the main shaft of the second spiral bevel gear steering gear 36 via the second coupling 33, the first connecting shaft 34, and the third coupling 35, respectively, again achieving a 90-degree shift in power direction. The side shafts of the second spiral bevel gear steering gear 36 on both sides are connected to the first screw box 40 via the fourth coupling 37, the second connecting shaft 38, and the fourth coupling 39, respectively, transmitting power to the first screw box 40. The first screw box 40 on both sides transmits power to the second screw box 44 via the sixth coupling 41, the third connecting shaft 42, and the seventh coupling 43, respectively. The two first screw boxes 40 and the two second screw boxes 44 are connected to the two first screw rods 26 and the two second screw rods 21 respectively, converting the rotational motion into the linear motion of the screw rods to achieve the lifting function. All components in the lifting device are fixed to the frame 1 by bolts.

[0060] like Figure 3 and Figure 4 The figure shows the packing replacement process. When replacing the packing, it is necessary to first loosen the bolts 17 connecting the third connecting flange 14 and the valve body 24. At this time, the third connecting flange 14 is still connected to the actuator 9, and the motor 30 drives the four screw rods to descend synchronously, driving the entire valve body to move downward to a suitable height for convenient packing replacement. Figure 4The schematic diagram of the packing installation is specifically shown. The third stud 47 and the packing gland 48 jointly apply a pre-tightening force to the packing 49 to ensure the sealing of the valve 24. When replacing the packing, it is only necessary to remove the nut 45 and the packing gland 48, and then use special tools to remove the packing after the wear test to measure key data such as the packing surface roughness and wear depth. After replacing the new packing, since other components remain in their original assembly state, only the nut 45 and the packing gland 48 need to be reinstalled to quickly complete the reassembly of the valve body. This design significantly improves the efficiency of packing replacement, saves experimental time, and thus improves the convenience and economy of the overall testing process.

[0061] The screw lift of the present invention obtains motor power through a coupling and a spiral bevel gear steering gear. The overall lifting function of the valve body can be used by simply loosening the bolts of the connecting flange at the packing, thereby avoiding the tedious steps of reassembly after replacing the packing and simplifying the operation process. Wear testing device: A hydraulically controlled actuator is used, and the actuator is connected to the valve stem to simulate the closing action of the valve, thereby accelerating the wear of the packing during actual use for testing. The first hydraulic station is connected to the first and second connecting flange pipelines through the hydraulic station pipeline to simulate actual working conditions; the second hydraulic station is connected to the actuator to control the movement of the actuator. The present invention controls the opening and closing of the valve through the actuator, and the rotary encoder continuously measures the valve angle and rotation speed, which can be used to optimize the packing wear and life experiment.

[0062] 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 above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above 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 liftable and replaceable valve packing wear test device, characterized in that: include: A supporting device, a valve, a driving device, a lifting device, a wear testing device and a hydraulic station system, wherein the valve comprises a valve body (24) and a valve stem (46) connected to the valve body (24), and a packing (49) is sealed between the upper part of the valve body (24) and the valve stem (46); The wear testing device comprises an actuator (9) and a third connecting flange (14), wherein the actuator (9) is mounted above the supporting device, the bottom of the actuator (9) is connected to the third connecting flange (14), and the third connecting flange (14) is detachably coaxially connected to the top of the valve body (24) via bolts (17); The hydraulic station system comprises a pipeline system, the hydraulic station system is connected to the actuator (9) via a hydraulic pipeline, the hydraulic station system is connected to the valve body (24) via a pipeline system, and the pipeline system is connected to the lifting device; The driving device and the lifting device are both installed on the supporting device. The driving device is connected to the lifting device. The lifting device is used to drive the pipeline system to lift and lower the valve body (24).

2. The liftable and replaceable valve packing wear test device according to claim 1 is characterized in that: The lifting device comprises two first lifting plates (5), two second lifting plates (18), two first screw rods (26), two second screw rods (21), two first screw rod boxes (40) and two second screw rod boxes (44), wherein the two first screw rod boxes (40) and the two second screw rod boxes (44) are distributed in four corners and are all connected to the driving device, wherein one first screw rod box (40) is coaxially arranged with one second screw rod box (44), another first screw rod box (40) is coaxially arranged with another second screw rod box (44), and the first screw rod box (40) and the second screw rod box (44) on the same side form a group; Each of the first screw rod boxes (40) is connected to a first screw rod (26), and the top of each of the first screw rods (26) is connected to a first lifting plate (5); each of the second screw rod boxes (44) is connected to a second screw rod (21), and the top of each of the second screw rods (21) is connected to a second lifting plate (18); the two first lifting plates (5) are connected to one side of the pipeline system, and the two second lifting plates (18) are connected to the other side of the pipeline system.

3. The liftable and replaceable valve packing wear test device according to claim 2 is characterized in that: The driving device comprises a motor (30), a first coupling (31), a first spiral bevel gear steering gear (32) and two sets of transmission mechanisms, wherein the motor (30) is mounted on a supporting device, an output end of the motor (30) is connected to the first spiral bevel gear steering gear (32) via the first coupling (31), two sides of the first spiral bevel gear steering gear (32) are respectively connected to a set of transmission mechanisms, and each set of transmission mechanisms is connected to a set of a first screw box (40) and a second screw box (44); The transmission mechanism comprises a second coupling (33), a first coupling (34), a third coupling (35), a second spiral bevel gear steering gear (36), a fourth coupling (37), a second coupling (38), a fourth coupling (39), a sixth coupling (41), a third coupling (42) and a seventh coupling (43); the second coupling (33), the first coupling (34), the third coupling (35) and the second spiral bevel gear steering gear (36) are connected in sequence; the second spiral bevel gear steering gear (36) is connected to a first screw box (40) in sequence through the fourth coupling (37), the second coupling (38) and the fourth coupling (39); the first screw box (40) is connected to a second screw box (44) in sequence through the sixth coupling (41), the third coupling (42) and the seventh coupling (43); the second coupling (33) of each transmission mechanism is connected to the first spiral bevel gear steering gear (32).

4. The liftable and replaceable valve packing wear test device according to claim 1, characterized in that: The hydraulic station system further comprises a first hydraulic station (23) and a second hydraulic station (27), wherein the second hydraulic station (27) is connected to the actuator (9) via a hydraulic pipeline, and the first hydraulic station (23) is connected to the valve body (24) via a pipeline system.

5. The liftable and replaceable valve packing wear test device according to claim 2, characterized in that: The pipeline system comprises a first ferrule flange (2), a first connecting flange (3), a second stud bolt (4), a second connecting flange (19), a second ferrule flange (20), an L-shaped fixing plate (22) and a first stud bolt (25); the first connecting flange (3) and the second connecting flange (19) are respectively connected to two sides of a valve body (24) through the first stud bolt (25); the first connecting flange (3) and the second connecting flange (19) are placed on the L-shaped fixing plate (22); the L-shaped fixing plate (22) is installed on a supporting device; the first lifting plate (5) and the second lifting plate (18) are respectively connected to the first connecting flange (3) and the second connecting flange (19) through the second stud bolt (4); the first lifting plate (5) and the second lifting plate (18) are connected to a first hydraulic station (23) of a hydraulic station system through a hydraulic pipeline.

6. The liftable and replaceable valve packing wear test device according to claim 5, characterized in that: A plurality of Hirschmann pressure gauges (6) are respectively installed on the first connecting flange (3) and the second connecting flange (19) for monitoring system pressure.

7. The liftable and replaceable valve packing wear test device according to claim 1, characterized in that: The wear testing device further comprises a first fixed bracket (10), a rotary encoder (11), a second fixed bracket (12) and an output shaft (13); the first fixed bracket (10) is fixed on the actuator (9); the second fixed bracket (12) is mounted on the first fixed bracket (10); the rotary encoder (11) is connected to the second fixed bracket (12); and the output shaft (13) of the actuator (9) is connected to the rotary encoder (11) by a snap-fit ​​connection.

8. The liftable and replaceable valve packing wear test device according to claim 1, characterized in that: A packing gland (48) is connected to the top of the valve body (24) via a nut (45) and a third stud (47), and the packing gland (48) is pressed against the packing (49) to apply a pre-tightening force to the packing (49).

9. The liftable and replaceable valve packing wear test device according to claim 1, characterized in that: A first L-shaped plate (7), a first limiting plate (8), a second limiting plate (15) and a second L-shaped plate (16) are installed above the support device; the first L-shaped plate (7) and the second L-shaped plate (16) are connected to the left and right sides of the actuator (9); the second L-shaped plate (16) is provided with a slot; a plurality of the first limiting plates (8) are provided and arranged on the left front and rear sides of the actuator (9); a plurality of the second limiting plates (15) are provided and arranged on the right front and rear sides of the actuator (9).

10. The liftable and replaceable valve packing wear test device according to claim 1, characterized in that: It also includes a data acquisition system, which includes a data acquisition card (28) and an industrial computer (29). The Hirschmann pressure gauge (6) and the rotary encoder (11) are both connected to the data acquisition card (28), and the data acquisition card (28) is connected to the industrial computer (29).

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