A test device for flushing pipe packing assembly

Abstract

The present invention relates to the technical field of flushing pipe packing test, and proposes a flushing pipe packing assembly test device, including a liquid inlet pipe arranged on a support frame, a flushing pipe joint being connected to the liquid inlet pipe, and also including: a connecting seat sleeve arranged on the flushing pipe joint, a clamping table in the connecting seat; a lower end seal head arranged on the connecting seat, the lower end seal head and the clamping table forming a clamping space; a plurality of mounting plates, which are sleeved on the flushing pipe joint at intervals and located in the clamping space, and an mounting space is formed between two adjacent mounting plates, and the mounting space is used to hold the flushing pipe packing; a rotary joint is arranged on the connecting seat, and the rotary joint is used to be connected to the transmission seal of the driving device, and the rotary joint, the connecting seat, the mounting plate, the flushing pipe packing, the flushing pipe joint and the liquid inlet pipe form a pressure space. Through the above technical scheme, the problem of low efficiency of flushing pipe packing test in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of flushing pipe packing testing, and in particular to a flushing pipe packing assembly testing device. Background Art

[0002] Pipe packing is a sealing device used in oil drilling and other fields. During the drilling process, the pipe packing is installed between the pipe and the center pipe to seal and prevent leakage of drilling fluid and other fluids. It is usually made of special wear-resistant and corrosion-resistant materials and can withstand high pressure, high temperature and various harsh working conditions during drilling. The performance of the pipe packing directly affects the safety and efficiency of drilling operations.

[0003] As the most important seal of petroleum equipment, flushing packing is always in a state of high pressure, high temperature and high speed wear during operation. When the seal is not tight after working for a period of time, it must be replaced with a new sealing packing. Replacing the packing during the operation of the equipment is labor-intensive and expensive. However, in the production oil field, there are problems such as long test cycle, high labor intensity of employees and high cost. Some existing test devices have complex structures, and many parts need to be disassembled to remove the tested flushing packing or install a new flushing packing. The overall test efficiency is also very low. Summary of the invention

[0004] The present invention provides a flushing pipe packing assembly test device, which solves the problem of low flushing pipe packing test efficiency in the related art.

[0005] The technical solution of the present invention is as follows:

[0006] A flushing pipe packing assembly test device comprises a liquid inlet pipe arranged on a support frame, a flushing pipe joint is connected to the liquid inlet pipe, and further comprises:

[0007] A connecting seat, sleeved on the flushing pipe joint, wherein the connecting seat has a clamping platform;

[0008] A lower end seal is arranged on the connecting seat, and the lower end seal and the clamping platform form a clamping space;

[0009] There are several mounting plates, which are sleeved on the flushing pipe joint at intervals and located in the clamping space. An installation space is formed between two adjacent mounting plates, and the installation space is used to hold the flushing pipe packing;

[0010] A rotary joint is arranged on the connection seat, and the rotary joint is used for transmission sealing connection with the driving device. The rotary joint, the connection seat, the mounting plate, the flushing pipe packing, the flushing pipe joint and the liquid inlet pipe form a pressure space.

[0011] Optionally, also include:

[0012] A pressure gauge is arranged on the liquid inlet pipe and is used to detect the pressure of the pressure space.

[0013] Optionally, the lower end cover and the rotary joint are threadedly connected to the connecting seat.

[0014] Optionally, also include:

[0015] There are a plurality of first sealing strips, which are respectively arranged at the connection between the rotary joint and the connection seat, and at the connection between the connection seat and the lower end head.

[0016] Optionally, also include:

[0017] The upper end cover is arranged on the support frame, and the flushing pipe joint is arranged on the upper end cover.

[0018] Optionally, the upper end cover and the support frame are threadedly connected to the liquid inlet pipe.

[0019] Optionally, also include:

[0020] The second sealing strip is arranged at the connection between the upper end sealing head and the liquid inlet pipe.

[0021] Optionally, also include:

[0022] A pressure relief pipe, arranged on the liquid inlet pipe and communicated with the liquid inlet pipe;

[0023] A pressure relief valve is arranged on the pressure relief pipe, and the pressure relief valve is used to close the pressure relief pipe.

[0024] Optionally, also include:

[0025] There are a plurality of clamping holes, which are respectively arranged on the pressure relief valve and the pressure relief pipe, and are all located outside the pressure relief pipe;

[0026] The clamping shaft is slidably arranged in the clamping hole. After the clamping shaft enters the clamping hole, it is used to limit the rotation of the pressure relief valve.

[0027] Optionally, also include:

[0028] A shell, arranged on the pressure relief pipe;

[0029] A C-shaped spring tube, disposed in the housing, the C-shaped spring tube having a fixed end and a swing end, the fixed end being in communication with the pressure relief tube;

[0030] A swing plate is rotatably arranged on the housing, the swing end is hinged to one end of the swing plate, the swing end is used to drive the swing plate to swing, and the other end of the swing plate has teeth;

[0031] A gear, rotatably disposed on the housing, the gear meshing with the teeth;

[0032] A winding shaft, arranged on the gear, and the winding shaft rotates following the gear;

[0033] The connecting rope has two ends respectively arranged on the clamping shaft and the winding shaft. After the winding shaft rotates, the connecting rope is wound around the winding shaft.

[0034] The working principle and beneficial effects of the present invention are:

[0035] In the present invention, in order to facilitate the flushing pipe packing test, a clamping space is formed by means of the lower end head, the connecting seat and the flushing pipe joint. When the performance of the flushing pipe packing needs to be tested, the upper end head is first disassembled, and the upper mounting plate can be taken out, and a mounting plate is retained inside. Then, the flushing pipe packing and the mounting plate are placed therein in turn, and different numbers of flushing pipe packings are placed according to the specific requirements of the test, and finally the upper end head is installed on the connecting seat.

[0036] The whole process is particularly easy and simple, and the efficiency of disassembling and installing the flushing packing has been significantly improved. It not only greatly reduces the time and labor costs required for operation, but also reduces the probability of errors during operation and improves the accuracy and reliability of the test. Moreover, due to the simplification of the operating steps, operators can master the process more quickly, which improves work efficiency while reducing the risk of equipment damage caused by unskilled operation.

[0037] The structure of the entire mechanism is very simple and easy to operate and maintain. It not only reduces the manufacturing cost of the equipment, but also enables maintenance personnel to locate and solve problems more quickly when equipment fails, reducing equipment downtime and further ensuring the continuity and stability of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0039] Figure 1 It is a schematic diagram of the structure of the present invention;

[0040] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0041] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0042] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0043] Figure 5 for Figure 2 Enlarged view of point C in the middle;

[0044] Figure 6 It is a schematic diagram of the pressure relief linkage structure of the present invention;

[0045] In the figure: 100, support frame, 200, liquid inlet pipe, 300, flushing pipe joint, 400, connecting seat, 401, clamping table, 402, lower end head, 403, mounting plate, 404, rotating joint, 201, pressure gauge, 405, first sealing strip, 301, upper end head, 302, second sealing strip, 202, pressure relief pipe, 203, pressure relief valve, 204, clamping hole, 205, clamping shaft, 206, shell, 207, C-type spring tube, 208, swing plate, 209, gear, 210, winding shaft, 211, connecting rope. DETAILED DESCRIPTION

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0047] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0048] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0050] like Figure 1-Figure 6As shown, this embodiment introduces a flushing pipe packing assembly test device, including a liquid inlet pipe 200 arranged on a support frame 100, and a flushing pipe joint 300 is connected to the liquid inlet pipe 200, and also includes: a connecting seat 400 is sleeved on the flushing pipe joint 300, and a clamping table 401 is provided in the connecting seat 400; a lower end head 402 is arranged on the connecting seat 400, and the lower end head 402 and the clamping table 401 form a clamping space; there are a plurality of mounting plates 403, which are sleeved on the flushing pipe joint 300 at intervals and are located in the clamping space, and an installation space is formed between two adjacent mounting plates 403, and the installation space is used to hold the flushing pipe packing; a rotary joint 404 is arranged on the connecting seat 400, and the rotary joint 404 is used to be connected to the driving device transmission seal, and the rotary joint 404, the connecting seat 400, the mounting plate 403, the flushing pipe packing, the flushing pipe joint 300 and the liquid inlet pipe 200 form a pressure space.

[0051] In this embodiment, in order to facilitate the flushing packing test, a clamping space is formed by means of the lower end cap 402, the connecting seat 400 and the flushing pipe joint 300. When the performance of the flushing pipe packing needs to be tested, the upper end cap 301 is first disassembled, and the upper mounting plate 403 can be taken out, and a mounting plate 403 is retained inside. Then, the flushing pipe packing and the mounting plate 403 are placed therein in turn, and different numbers of flushing pipe packings are placed according to the specific requirements of the test, and finally the upper end cap 301 is installed on the connecting seat 400.

[0052] In this embodiment, both the static sealing performance and the dynamic sealing performance of the flushing pipe packing can be detected. When the driving device is not in motion, the static sealing performance can be detected. When the driving device is in motion, the dynamic sealing performance can be detected.

[0053] The whole process is particularly easy and simple, and the efficiency of disassembling and installing the flushing packing has been significantly improved. It not only greatly reduces the time and labor costs required for operation, but also reduces the probability of errors during operation and improves the accuracy and reliability of the test. Moreover, due to the simplification of the operating steps, operators can master the process more quickly, which improves work efficiency while reducing the risk of equipment damage caused by unskilled operation.

[0054] The structure of the entire mechanism is very simple and easy to operate and maintain. It not only reduces the manufacturing cost of the equipment, but also enables maintenance personnel to locate and solve problems more quickly when equipment fails, reducing equipment downtime and further ensuring the continuity and stability of production.

[0055] Optionally, it also includes: a pressure gauge 201 is arranged on the liquid inlet pipe 200, and is used to detect the pressure of the pressure space.

[0056] In this embodiment, in order to detect the pressure of the pressure space, a pressure gauge 201 is installed on the liquid inlet pipe 200 to monitor the pressure in real time. The operator can intuitively and clearly understand the pressure changes in the pressure space at any time, so that corresponding adjustments and operations can be made in time to avoid various problems caused by abnormal pressure.

[0057] Furthermore, other detection elements, such as a temperature sensor, can be provided on the support frame 100 to detect the temperature of the flushing packing during the dynamic seal detection process. Various detection elements can be provided as required to obtain the required data.

[0058] Optionally, the lower end cover 402 and the rotary joint 404 are threadedly connected to the connecting seat 400 .

[0059] In this embodiment, a structure is introduced that can realize quick disassembly of the lower end cover 402. The threaded connection method adopted can not only quickly install and disassemble, greatly improving the convenience and efficiency of operation, but also play a sealing role, effectively avoiding the situation of pressure release from the connection.

[0060] Optionally, it also includes: there are multiple first sealing strips 405, which are respectively arranged at the connection between the rotary joint 404 and the connecting seat 400, and at the connection between the connecting seat 400 and the lower end head 402.

[0061] In this embodiment, in order to improve the sealing effect, a first sealing strip 405 is provided at the connection between the rotary joint 404 and the connection seat 400, and at the connection between the connection seat 400 and the lower end seal 402. By adding the first sealing strip 405, the sealing performance of each connection part is significantly enhanced, and the pressure leakage from the connection is effectively prevented, thereby greatly improving the sealing performance and reliability of the entire device.

[0062] Optionally, it also includes: the upper end head 301 is arranged on the support frame 100, the flushing pipe joint 300 is arranged on the upper end head 301, and the upper end head 301 and the support frame 100 are threadedly connected with the liquid inlet pipe 200.

[0063] In this embodiment, in order to facilitate the connection between the flushing pipe joint 300 and the liquid inlet pipe 200, the flushing pipe joint 300 is installed on the support frame 100 through the upper end cap 301. This makes the connection between the flushing pipe joint 300 and the liquid inlet pipe 200 smoother and more stable.

[0064] Furthermore, screw holes are provided on the lower end cover 402, the rotary joint 404, the connecting seat 400, the upper end cover 301, the liquid inlet pipe 200 and the bracket, and the connection strength of each part is further strengthened by bolts.

[0065] Optionally, it also includes: a second sealing strip 302 is arranged at the connection between the upper end cover 301 and the liquid inlet pipe 200.

[0066] Optionally, it also includes: a pressure relief pipe 202 is arranged on the liquid inlet pipe 200 and is connected to the liquid inlet pipe 200; a pressure relief valve 203 is arranged on the pressure relief pipe 202, and the pressure relief valve 203 is used to close the pressure relief pipe 202.

[0067] In this embodiment, due to the huge pressure generated during the sealing test, once the flushing packing leaks, liquid will be ejected from the gap between the upper end cap 301 and the flushing joint 300. This ejection process will last for a long time. Since the pressure during the ejection is quite high and there is a great danger, human intervention is impossible.

[0068] For this purpose, a pressure relief pipe 202 is specially provided on the liquid inlet pipe 200. When pressure relief operation is required, the pressure relief valve 203 only needs to be opened, and the liquid will be discharged from the pressure relief pipe 202. This discharge process is relatively short, and there is no need for manual intervention in the previous injection position, thereby effectively reducing the risk, ensuring the safety of the operator, and making the entire test process safer and more stable.

[0069] Optionally, it also includes: there are several clamping holes 204, which are respectively arranged on the pressure relief valve 203 and the pressure relief pipe 202, and are all located outside the pressure relief pipe 202; the clamping shaft 205 is slidably arranged in the clamping hole 204, and after the clamping shaft 205 enters the clamping hole 204, it is used to limit the rotation of the pressure relief valve 203.

[0070] In this embodiment, a method for closing and opening the pressure relief valve 203 is introduced. When it is necessary to open, the clamping shaft 205 can be pulled out from the clamping hole 204 on the pressure relief valve 203. When it is necessary to close, the clamping shaft 205 is respectively located in the clamping hole 204 on the pressure relief pipe 202 and the pressure relief valve 203.

[0071] Optionally, it also includes: a shell 206 is arranged on the pressure relief pipe 202; a C-type spring tube 207 is arranged in the shell 206, the C-type spring tube 207 has a fixed end and a swing end, and the fixed end is connected to the pressure relief pipe 202; a swing plate 208 is rotatably arranged on the shell 206, the swing end is hinged to one end of the swing plate 208, the swing end is used to drive the swing plate 208 to swing, and the other end of the swing plate 208 has teeth; a gear 209 is rotatably arranged on the shell 206, and the gear 209 is meshed with the teeth; a winding shaft 210 is arranged on the gear 209, and the winding shaft 210 rotates with the gear 209; the two ends of the connecting rope 211 are respectively arranged on the clamping shaft 205 and the winding shaft 210, and after the winding shaft 210 rotates, the connecting rope 211 is wound around the winding shaft 210.

[0072] In this embodiment, in order to prevent leakage when no one is watching, a pressure relief linkage structure is used to link leakage and active pressure relief. When leakage occurs, the pressure will continue to decrease, and the C-type spring tube 207 will continue to deform, thereby driving the swing plate 208 to swing, and then the gear 209 rotates, driving the winding shaft 210 to rotate, and the winding shaft 210 will pull the connecting rope 211, and the connecting rope 211 pulls the clamping shaft 205 to slide out of the clamping hole 204 on the pressure relief valve 203, and the pressure relief is achieved after the pressure relief valve 203 is opened. The process of continuous spraying is avoided, and the risk of people coming suddenly and being hit by high-pressure liquid is also avoided.

[0073] In this embodiment, a specific method for using a flushing pipe packing assembly test device is disclosed (only some usage methods are given as examples), including:

[0074] 1) Oil resistance test of flushing packing. The specific operation method is: Under normal temperature conditions, soak the flushing packing in diesel for 72 hours, and test the appearance, quality and physical changes.

[0075] 2) Static sealing performance test of flushing pipe packing. The specific operation method is: pressurize the liquid inlet pipe from 200, gradually load the pressure from 0MPa to the design pressure of 78MPa, and collect data at the same time. Maintain the pressure for 5 minutes for each increase of 10MPa. During the pressure maintenance period, there must be no leakage, deformation, damage and abnormal phenomenon. Then release the pressure to 0MPa, increase the pressure to 78MPa for the second time, and maintain the pressure for 15 minutes. While loading, pay close attention to the pressure drop and make records.

[0076] 3) Low pressure and low speed dynamic seal test:

[0077] Single-pipe flushing packing life test, verify the life of single-pipe flushing packing. Speed ​​50r / min, temperature below 90℃, pressure 10MPa. Maintain for 24 hours, if there is no leakage or pressure drop, upgrade to pressure 10MPa, speed 80~100r / min, other conditions remain unchanged, and maintain for another 24 hours. If there is no leakage or pressure drop, switch to high pressure and low speed test.

[0078] Life test of two flushing pipe packings. Speed ​​50r / min, temperature below 90℃, pressure 10MPa, work until the second flushing pipe packing fails, record the working time. Maintain for 24 hours first, if there is no leakage or pressure drop, then upgrade to pressure 10MPa, speed 80~100r / min, other conditions remain unchanged, and maintain for another 24 hours. If there is no leakage or pressure drop, switch to high pressure and low speed test.

[0079] Three-pipe flushing packing life test. Speed ​​50r / min, temperature below 90℃, pressure 10MPa, work until the third flushing packing fails, record the working time. Maintain for 24 hours first, if there is no leakage or pressure drop, then upgrade to pressure 10MPa, speed 80~100r / min, other conditions remain unchanged, and maintain for another 24 hours. If there is no leakage or pressure drop, switch to high pressure and low speed test.

[0080] Life test of four flushing pipe packings. Speed ​​50r / min, temperature below 90℃, pressure 10MPa, work until the fourth flushing pipe packing fails, record the working time. Maintain for 24 hours first, if there is no leakage or pressure drop, then upgrade to pressure 10MPa, speed 80~100r / min, maintain for 24 hours, if there is no leakage or pressure drop, switch to high pressure and low speed test.

[0081] 4) High pressure, low speed dynamic seal test:

[0082] Punch pipe packing life test under high pressure and low speed. The initial pressure is gradually loaded from 0MPa to 35MPa, the speed is 60r / min, and each pressure load (5MPa is a pressure step) is run steadily for 5 minutes. During the pressure stabilization period, the speed and pressure drop at the highest pressure are recorded.

[0083] When the pressure reaches 35MPa and the speed is maintained at 60r / min for 15 minutes, if there is no leakage, pressure drop or other abnormalities, the speed is increased to 80r / min and maintained for another 15 minutes. If there is still no abnormality, the speed is increased to 100r / min and the speed is maintained for the test. The pressure and flushing temperature data are recorded every 10 minutes. During the test, if the flushing temperature exceeds 90℃, the test should be suspended and the test can be restarted after the temperature drops below 50℃ (test pressure 35MPa, speed 100 r / min).

[0084] During the test, if the pressure data drops to 30MPa, turn on the oil pump to make up the pressure of the test device to 35MPa for the first time, and keep 100r / min to continue the test. After the initial pressure replenishment, when the pressure drops to 30MPa, make up the pressure to 35MPa for the second time, and keep 100r / min to continue the test. After the second pressure replenishment, when the pressure drops to 30MPa again, it can be determined that the flushing packing has leaked and the test is stopped.

[0085] 5) High pressure and high speed dynamic seal test:

[0086] Punch pipe packing life test under high pressure and high speed. The pressure is gradually loaded from 0MPa to 52MPa, the speed is 100r / min, and each pressure load (5MPa is a pressure increase step) is run stably for 5 minutes. During the pressure stabilization period, the speed and pressure drop at the highest pressure are recorded. During the operation, there must be no leakage, deformation, damage or abnormal phenomenon.

[0087] 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 preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A flushing pipe packing assembly test device, comprising a liquid inlet pipe (200) arranged on a support frame (100), a flushing pipe joint (300) being connected to the liquid inlet pipe (200), characterized in that: Also includes: A connecting seat (400) is sleeved on the flushing pipe joint (300), and a clamping platform (401) is provided in the connecting seat (400); A lower end seal (402) is arranged on the connecting seat (400), and the lower end seal (402) and the clamping platform (401) form a clamping space; A plurality of mounting plates (403) are sleeved on the flushing pipe joint (300) at intervals and located in the clamping space, and a mounting space is formed between two adjacent mounting plates (403), the mounting space being used to hold flushing pipe packing; a rotary joint (404) disposed on the connection seat (400), the rotary joint (404) being used for transmission sealing connection with the driving device, the rotary joint (404), the connection seat (400), the mounting plate (403), the flushing pipe packing, the flushing pipe joint (300) and the liquid inlet pipe (200) forming a pressure space; A pressure relief pipe (202) is arranged on the liquid inlet pipe (200) and is in communication with the liquid inlet pipe (200); A pressure relief valve (203) is arranged on the pressure relief pipe (202), and the pressure relief valve (203) is used to close the pressure relief pipe (202); There are a plurality of clamping holes (204), which are respectively arranged on the pressure relief valve (203) and the pressure relief pipe (202), and are all located outside the pressure relief pipe (202); A clamping shaft (205) is slidably disposed in the clamping hole (204); after the clamping shaft (205) enters the clamping hole (204), it is used to limit the rotation of the pressure relief valve (203); A housing (206) is arranged on the pressure relief pipe (202); A C-shaped spring tube (207) is disposed in the housing (206), the C-shaped spring tube (207) having a fixed end and a swing end, the fixed end being in communication with the pressure relief tube (202); A swing plate (208) is rotatably disposed on the housing (206), the swing end being hinged to one end of the swing plate (208), the swing end being used to drive the swing plate (208) to swing, and the other end of the swing plate (208) having teeth; A gear (209) rotatably disposed on the housing (206), the gear (209) meshing with the teeth; A winding shaft (210) is arranged on the gear (209), and the winding shaft (210) rotates along with the gear (209); The connecting rope (211) has two ends respectively arranged on the clamping shaft (205) and the winding shaft (210); after the winding shaft (210) rotates, the connecting rope (211) is wound around the winding shaft (210).

2. A flushing pipe packing assembly test device according to claim 1, characterized in that: Also includes: A pressure gauge (201) is arranged on the liquid inlet pipe (200) and is used to detect the pressure of the pressure space.

3. A flushing pipe packing assembly test device according to claim 1, characterized in that: The lower end cover (402) and the rotary joint (404) are threadedly connected to the connection seat (400).

4. A flushing pipe packing assembly test device according to claim 1, characterized in that: Also includes: There are a plurality of first sealing strips (405), which are respectively arranged at the connection between the rotary joint (404) and the connection seat (400), and at the connection between the connection seat (400) and the lower end cover (402).

5. A flushing pipe packing assembly test device according to claim 1, characterized in that: Also includes: The upper end seal (301) is arranged on the support frame (100), and the flushing pipe joint (300) is arranged on the upper end seal (301).

6. A flushing pipe packing assembly test device according to claim 5, characterized in that: The upper end cover (301) and the support frame (100) are threadedly connected to the liquid inlet pipe (200).

7. A flushing packing assembly test device according to claim 5, characterized in that: Also includes: The second sealing strip (302) is arranged at the connection between the upper end cover (301) and the liquid inlet pipe (200).

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