Urea pipe pressure test device and test method thereof

Abstract

The present invention relates to the technical field of pressure resistance detection, and specifically to a urea pipe pressure resistance test device and a test method thereof, comprising: a support frame, on which a lower support member and an upper pressure member are arranged, and sealing gaskets are arranged on the lower support member and the upper pressure member; a primary pressure assembly, which is arranged on the support frame and connected to the upper pressure member, and the primary pressure assembly comprises an energy storage structure and a guide member, and a coaxial roller group connected to the energy storage structure cooperates with the guide member to enable the upper pressure member to have a tendency to move toward or away from the lower support member; a pump air assembly, which is connected to the upper pressure member, and a staggered portion is formed at one end of the pump air assembly, and the staggered portion is connected to a driving source arranged on the support frame; a secondary pressure assembly, which is connected to the driving source, and the secondary pressure assembly can cooperate with the coaxial roller group when the upper pressure member applies pressure to one end of the pipe fitting, so as to increase the force of the upper pressure member acting on the end of the pipe fitting, so that the sealing properties of the two ends of the pipe fitting and the internal pressure thereof are proportional, thereby improving the upper limit of detection.

Description

Technical Field

[0001] The invention relates to the technical field of pressure resistance detection, in particular to a urea pipe pressure resistance testing device and a testing method thereof. Background Art

[0002] Trucks play an important role in many fields, mainly used to transport goods and commodities. And with the development of the transportation industry, the role of trucks is far more than simple cargo transportation, but it promotes the operation and development of society in many aspects.

[0003] Although the use of trucks has brought benefits to our lives, it also has certain side effects, such as the exhaust emissions from trucks, which contain hundreds of different compounds. These compounds not only have a serious impact on the environment, but also directly harm human health. The use of automotive urea can reduce the production of these compounds.

[0004] In the vehicle system of the truck, automotive urea enters the vehicle's exhaust system through the urea pipe to neutralize the nitrogen oxides in the exhaust gas. Specifically, the urea pipe includes a flexible hose and a plastic connecting pipe. The function of the plastic connecting pipe is to connect the flexible hose with the urea tank. Compared with the flexible hose, the plastic connecting pipe is thinner and more prone to cracking. Therefore, it is necessary to perform a pressure test on it during the production process.

[0005] For the existing plastic connecting pipe pressure test equipment, complicated operations are required before the test to ensure the connection stability and sealing between the plastic connecting pipe and the test equipment, which is a large workload, and the sealing is a constant value, which cannot change with the change of the internal pressure of the plastic connecting pipe, resulting in the limitation of the pressure test limit of the plastic connecting pipe, and the inability to test the stability of the urea pipe under extreme conditions. Summary of the invention

[0006] The object of the present invention is to provide a urea pipe pressure test device and a test method thereof to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A urea pipe pressure test device, comprising:

[0009] A support frame, wherein the support frame is provided with a lower support member and an upper pressure member that cooperate with each other to clamp the two ends of the pipe fitting, and a sealing gasket is provided on the side of the lower support member and the upper pressure member facing the pipe fitting;

[0010] A primary pressure component is arranged on the support frame and connected to the upper pressure member, the primary pressure component includes an energy storage structure and a guide member, and a coaxial roller group connected to the energy storage structure cooperates with the guide member to enable the upper pressure member to have a tendency to move toward or away from the lower support member;

[0011] A pump air component is connected to the upper pressure member, and a staggered portion is formed at one end of the pump air component, and the staggered portion is connected to a driving source arranged on the support frame. After the driving source moves to a predetermined position, the pump air component can follow the driving source to move;

[0012] A secondary pressure component is connected to the driving source. When the upper pressure component applies pressure to one end of the pipe, the secondary pressure component can cooperate with the coaxial roller group to increase the force of the upper pressure component on the end of the pipe.

[0013] As a further solution of the present invention: the energy storage structure comprises a sliding connection part sliding in a No. 1 slide groove arranged on the support frame, one end of the sliding connection part is connected to the upper pressure member, and the other end is provided with a follower sleeve plate, a telescopic plate is slidably installed in the follower sleeve plate, and the telescopic plate is connected to the sliding connection part through a No. 1 columnar spring;

[0014] The coaxial roller wheel set comprises a first abutment wheel and a second abutment wheel which are connected to the telescopic plate and are coaxially arranged.

[0015] As a further solution of the present invention: the guide member is installed on the support frame, and the side of the guide member away from the follower sleeve is formed by two groups of No. 1 inclined guide surfaces, and the connection between the two groups of No. 1 inclined guide surfaces forms an outer convex portion, and the No. 1 abutment wheel can roll between the two No. 1 inclined guide surfaces via the outer convex portion.

[0016] As a further solution of the present invention: the pump air assembly comprises a pump cylinder body mounted on the support frame, one end of the pump cylinder body is connected to the upper pressure member through a flexible conduit, and a sealing plug is sealingly and slidably mounted in the pump cylinder body, a connecting shaft penetrating the pump cylinder body is connected to the sealing plug, and one end of the connecting shaft away from the sealing plug is connected to the staggered portion;

[0017] The staggered portion comprises a staggered shaft coaxially fixed with the connecting shaft, and stop blocks are arranged at both ends of the staggered shaft.

[0018] As a further solution of the present invention: the driving source comprises a slider sliding in a second slide groove arranged on the support frame, the slider is provided with a sliding sleeve slidably connected to the staggered shaft, and the slider is provided with a connecting plate connected to the secondary pressure assembly;

[0019] The electric telescopic rod installed on the support frame is connected with the sliding block and the sliding sleeve.

[0020] As a further solution of the present invention: the secondary pressure-applying assembly comprises a horizontally arranged transverse frame, the transverse frame is connected to the support frame via a telescopic rod, and one end of the transverse frame is provided with a second inclined guide surface adapted to the second abutment wheel;

[0021] A transverse shaft is also installed in the transverse frame, and the transverse shaft is slidably connected to the connecting plate. A second column spring is sleeved on the transverse shaft, and one end of the second column spring is connected to the side wall of the transverse frame, and the other end is connected to the connecting plate.

[0022] As a further solution of the present invention: the urea pipe pressure test device further includes:

[0023] Two sets of arc-shaped grille guard plates are rotatably mounted on the support frame, and the two sets of arc-shaped grille guard plates remain coaxial with the pipe fitting when closed;

[0024] A transverse plate is arranged on the support frame, and an engaging groove is formed on the transverse plate. An engaging wheel connected to the follower sleeve plate through a connecting rod can roll in the engaging groove, and can drive the transverse plate to move toward or away from the support frame when the height of the upper pressure member changes;

[0025] A traction structure connects the transverse plate and the arc-shaped grille guard plate. The traction structure can open or close the two groups of arc-shaped grille guard plates when the transverse plate moves.

[0026] As a further solution of the present invention: the engaging groove includes two groups of vertical groove bodies staggeredly arranged on the transverse displacement plate, and the two groups of vertical groove bodies are connected through an inclined groove body.

[0027] As a further solution of the present invention: the traction structure comprises an extension rod connected to the rotating shaft of the arc-shaped grille guard plate, and a pulley is rotatably mounted on the end of the extension rod;

[0028] The traction structure further comprises a pulling frame slidably arranged through the supporting frame, one end of the pulling frame is provided with a transverse groove, the pulley can roll in the transverse groove, and the other end of the pulling frame is connected to the transverse plate.

[0029] A method for testing the pressure resistance performance of a urea pipe using the testing device comprises the following steps:

[0030] Step 1: Push the upper pressure piece upward, and under the action of the primary pressure assembly, the upper pressure piece is in a state away from the lower support piece. At this time, the engaging wheel cooperates with the engaging groove to enable the transverse plate to be away from the support frame, and the two sets of arc grille guard plates are opened through the traction structure;

[0031] Step 2: Place the pipe to be tested on the lower support, then pull down the upper pressure piece, so that the end of the pipe to be tested abuts against the sealing gaskets on the lower support and the upper pressure piece, and the two sets of arc grille guard plates are closed;

[0032] Step 3: Control the driving source to move. At this time, the driving source will first drive the secondary pressure component to move, acting on the primary pressure component, so that the force of the upper pressure component on the pipe to be tested increases, and then the driving source cooperates with the staggered part to drive the pump gas component to move, and inject compressed gas into the pipe to be tested;

[0033] Step 4: The driving source continues to operate, so that the force of the upper pressure member on the pipe to be tested continues to increase, and at the same time, the pump assembly causes the pressure inside the pipe to be tested to continuously increase, until the pressure inside the pipe to be tested reaches a preset value, and the driving source stops operating and maintains;

[0034] Step 5: Observe the pressure changes inside the pipe to be tested and complete the test.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] By setting up a one-time pressure component, the upper pressure piece can have two different position states, one of which can keep the upper pressure piece away from the lower support piece, so that there is enough gap between the upper pressure piece and the lower support piece to place the pipe fittings, avoiding interference between the upper end of the pipe fittings and the upper pressure piece, improving the stability of the upper pressure piece when placing the pipe fittings and the convenience of operation, and the other position state can keep the upper pressure piece close to the lower support piece, and use the sealing gasket between the two to achieve pre-sealing of the pipe fittings and loading and fixing of the pipe fittings, and the two position states are easy to switch, reducing the amount of operations when loading and removing the pipe fittings;

[0037] By setting the pump air component and driving source, when the electric telescopic rod moves, the secondary pressure component will be moved first, so that the abutment force of the upper pressure piece on the upper end of the pipe fitting is increased, so that the pipe fitting obtains a better sealing effect, so as to prevent the compressed gas from leaking in the initial stage of the pressure increase in the pipe fitting, and improve the air tightness of the two ends of the pipe fitting. At the same time, when the sealing plug and the connecting plate move synchronously, the degree of gas compression can be positively correlated with the abutment force of the upper pressure piece and the lower support piece on the two ends of the pipe fitting, so that as the pressure in the pipe fitting increases, the compressed gas can act on the inner wall of the pipe fitting, so that the pipe fitting will not bend or fold under the pressure of the upper pressure piece and the lower support piece, thereby improving the straightness of the pipe fitting during the detection process, and avoiding the leakage of compressed air caused by the bending of the pipe fitting under pressure, thereby causing the detection failure;

[0038] By setting up the secondary pressure component, when the connecting plate moves, the first column spring and the second column spring can act on the first abutment wheel and the second abutment wheel respectively, and generate a synergistic force. Under the action of the two, the upper pressure piece can increase the force on the upper end of the pipe fitting, so that when the pressure inside the pipe fitting is increased, the sealing effect and the supporting force of the pipe fitting itself are guaranteed;

[0039] By providing the arc-shaped grille guard plate, traction structure, transverse plate and interlocking wheel, when the upper pressure member is away from the lower support frame for loading the pipe fittings, the two arc-shaped grille guard plates can remain in an open state to facilitate loading and disassembly of the pipe fittings. After the pipe fittings are placed on the lower support member, when the upper pressure member moves downward and abuts against the upper end of the pipe fittings, the two arc-shaped grille guard plates can close and form an annular protective cover to avoid the dangerous situation of the pipe fittings bursting and splashing due to the increase in internal pressure during the inspection process, thereby improving the safety of the inspection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 The present invention is a structural schematic diagram of an embodiment of a urea pipe pressure test device.

[0041] Figure 2 This is a schematic structural diagram from another angle in one embodiment of a urea pipe pressure test device.

[0042] Figure 3 This is a schematic structural diagram of a primary pressure-applying component in one embodiment of a urea pipe pressure-withstand testing device.

[0043] Figure 4 The present invention is a schematic structural diagram of an arc-shaped grille guard plate, a traction structure, a transverse plate and an interlocking wheel in one embodiment of a urea pipe pressure test device.

[0044] Figure 5 for Figure 4 A magnified view of the structure.

[0045] Figure 6 This is a schematic diagram of the structure of a pump air component, a drive source and a secondary pressure component in one embodiment of a urea pipe pressure test device.

[0046] Figure 7 This is a structural explosion diagram of the secondary pressure-applying component in one embodiment of a urea pipe pressure test device.

[0047] Figure 8 This is a schematic diagram of the structure of a pump air component in one embodiment of a urea pipe pressure test device.

[0048] In the figure: 1, support frame; 101, No. 1 slideway; 102, No. 2 slideway; 2, lower support member; 3, upper pressure member; 4, sealing gasket; 5, sliding connection part; 6, follower sleeve; 7, telescopic plate; 8, No. 1 cylindrical spring; 9, No. 1 abutment wheel; 10, No. 2 abutment wheel; 11, guide member; 1101, No. 1 inclined guide surface; 1102, outer protrusion; 12, connecting rod; 13, engaging wheel; 14, transverse plate; 1401, vertical slot; 1402, inclined slot ; 15. Pulling frame; 1501. Horizontal groove; 16. Arc grille guard plate; 17. Extension rod; 18. Pulley; 19. Pump cylinder body; 20. Sealing plug; 21. Connecting shaft; 22. Stop block; 23. Staggered shaft; 24. Flexible conduit; 25. Electric telescopic rod; 26. Sliding sleeve; 27. Sliding block; 28. Connecting plate; 29. ​​Horizontal axis; 30. No. 2 columnar spring; 31. Transverse frame; 3101. No. 2 inclined guide surface; 32. Guide rod; 33. Guide sleeve. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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. 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.

[0050] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0051] See also Figure 1 to Figure 8In an embodiment of the present invention, a urea pipe pressure test device includes: a support frame 1, a primary pressure component, a pump gas component and a secondary pressure component, so that when the electric telescopic rod 25 is actuated, the secondary pressure component will be actuated first, and the abutting force of the upper pressure member 3 on the upper end of the pipe will be increased, so that the pipe can obtain a better sealing effect, so as to prevent the compressed gas from leaking in the initial stage of the pressure increase in the pipe, and improve the air tightness of both ends of the pipe. At the same time, when the sealing plug 20 and the connecting plate 28 move synchronously, the degree of gas compression can be positively correlated with the abutting force of the upper pressure member 3 and the lower support member 2 on the two ends of the pipe, and as the pressure in the pipe increases, the compressed gas can act on the inner wall of the pipe, so that the pipe will not bend or bend under the pressure of the upper pressure member 3 and the lower support member 2, thereby improving the straightness of the pipe during the detection process, and avoiding the leakage of compressed air caused by the bending of the pipe under pressure, thereby causing the detection failure.

[0052] Specifically, the support frame 1 is provided with a lower support member 2 and an upper pressure member 3 that cooperate with each other to clamp the two ends of the pipe fitting, and a sealing gasket 4 is provided on the side of the lower support member 2 and the upper pressure member 3 facing the pipe fitting, and the sealing gasket 4 abuts against the end of the pipe fitting to improve the sealing performance of the end of the pipe fitting;

[0053] The primary pressure assembly is arranged on the support frame 1 and connected to the upper pressure member 3. The primary pressure assembly includes an energy storage structure and a guide member 11. The energy storage structure includes a sliding connection part 5 that slides in a No. 1 slide groove 101 arranged on the support frame 1. One end of the sliding connection part 5 is connected to the upper pressure member 3, and the other end is provided with a follower sleeve 6. A telescopic plate 7 is slidably installed in the follower sleeve 6. The telescopic plate 7 is connected to the sliding connection part 5 through a No. 1 columnar spring 8.

[0054] The coaxial roller set connected to the telescopic plate 7 cooperates with the guide member 11 to enable the upper pressure member 3 to have a tendency to move toward or away from the lower support member 2. The coaxial roller set includes a first abutment wheel 9 and a second abutment wheel 10 connected to the telescopic plate 7 and coaxially arranged.

[0055] The guide member 11 is installed on the support frame 1, and the side of the guide member 11 away from the follower sleeve 6 is formed by two groups of No. 1 inclined guide surfaces 1101, and the connection between the two groups of No. 1 inclined guide surfaces 1101 forms an outer protrusion 1102, and the No. 1 abutment wheel 9 can roll between the two No. 1 inclined guide surfaces 1101 through the outer protrusion 1102.

[0056] When the plastic connecting pipe to be tested (i.e. the above-mentioned pipe fitting) is loaded between the lower support member 2 and the upper pressure member 3, the No. 1 abutting wheel 9 is in the No. 1 inclined guide surface 1101 of the upper part. At this time, the No. 1 columnar spring 8 is in a stretched state, so that the No. 1 columnar spring 8 has the force to pull the telescopic plate 7 toward the inside of the follower sleeve plate 6. Under the action of this force, the No. 1 abutting wheel 9 abuts against the No. 1 inclined guide surface 1101 and generates an upward component force. Under the action of this separation, the sliding connection part 5 has the tendency to drive the upper pressure member 3 to continue to move upward, and the sliding connection part 5 is in an abutting state with the upper end of the No. 1 slide groove 101, so that the sliding connection part 5 and the upper pressure member 3 can remain in a static state. At this time, when the pipe fitting is placed on the lower support member 2, the upper end of the pipe fitting will not interfere with the upper pressure member 3, thereby facilitating the placement of the pipe fitting and reducing the difficulty of operation.

[0057] When the pipe is placed on the lower support member 2, the upper pressure member 3 is pulled down, and the upper pressure member 3 can drive the sliding connection part 5, the follower sleeve 6 and the telescopic plate 7 to move downward, and make the No. 1 abutting wheel 9 move downward along the No. 1 inclined guide surface 1101 on the upper part. In this process, the No. 1 columnar spring 8 will be pulled up and store elastic potential energy. When the No. 1 abutting wheel 9 moves over the outer protrusion 1102, the No. 1 columnar spring 8 will actively release the elastic potential energy and pull the telescopic plate 7 toward the inner side of the follower sleeve 6. The upper end of the pipe is moved, and the No. 1 abutting wheel 9 moves along the No. 1 inclined guide surface 1101 at the bottom, so as to actively drive the upper pressure piece 3 to move toward the upper end of the pipe, until the sealing gasket 4 on the upper pressure piece 3 abuts against the upper end of the pipe, and the No. 1 columnar spring 8 still has a tendency to release elastic potential energy, and has a tendency to pull the upper pressure piece 3 to continue to move downward. At this time, the upper pressure piece 3 and the sealing gasket 4 on the lower support piece 2 can cooperate to seal the two ends of the pipe and complete the loading and fixation of the pipe.

[0058] Through the above arrangement, the upper pressure piece 3 can have two different position states, one of which can keep the upper pressure piece 3 away from the lower support piece 2, so that there is a sufficient gap between the upper pressure piece 3 and the lower support piece 2 to place the pipe, avoiding interference between the upper end of the pipe and the upper pressure piece 3, thereby improving the stability of the upper pressure piece 3 when placing the pipe and the convenience of operation; the other position state can keep the upper pressure piece 3 close to the lower support piece 2, and use the sealing gasket 4 between the two to achieve pre-sealing of the pipe and loading and fixing of the pipe, and the two position states are easy to switch, reducing the amount of operation when loading and disassembling the pipe.

[0059] See also Figure 1 , Figure 2 , Figure 6 , Figure 8The pump air component is connected to the upper pressure member 3, and a staggered portion is formed at one end of the pump air component, and the staggered portion is connected to a driving source provided on the support frame 1. After the driving source moves to a predetermined position, the pump air component can follow the driving source to move;

[0060] The pump air assembly includes a pump cylinder body 19 mounted on the support frame 1, one end of the pump cylinder body 19 is connected to the upper pressure member 3 through a flexible conduit 24, and a sealing plug 20 is sealingly and slidably mounted in the pump cylinder body 19, a connecting shaft 21 penetrating the pump cylinder body 19 is connected to the sealing plug 20, and one end of the connecting shaft 21 away from the sealing plug 20 is connected to the staggered portion;

[0061] The staggered portion includes a staggered shaft 23 coaxially fixed to the connecting shaft 21, and stop blocks 22 are provided at both ends of the staggered shaft 23;

[0062] The driving source includes a slider 27 that slides in the second slide groove 102 provided on the support frame 1, the slider 27 is provided with a sliding sleeve 26 that is slidably connected to the staggered shaft 23, and the slider 27 is provided with a connecting plate 28 that is connected to the secondary pressure assembly;

[0063] The electric telescopic rod 25 installed on the support frame 1 is connected to the slider 27 and the sliding sleeve 26, wherein the electric telescopic rod 25 can also be equivalently replaced by a hydraulic cylinder or a pneumatic cylinder. All three are applications of the prior art, so they are not described in detail. During production, they can be assembled preferentially on the premise of meeting the driving requirements.

[0064] When the pipes are loaded, the pump cylinder 19, the flexible conduit 24 and the pipes form a closed chamber. At this time, the electric telescopic rod 25 is controlled to move, and the electric telescopic rod 25 will drive the sliding sleeve 26 and the connecting plate 28 to move. Since the pump cylinder 19 is in a closed state, when the sliding sleeve 26 moves, it can slide relative to the staggered shaft 23, that is, when the sliding sleeve 26 slides on the staggered shaft 23, only the connecting plate 28 moves. At this time, the connecting plate 28 can apply pressure to the second abutting wheel 10 by driving the secondary pressure component to move, thereby further improving the upper pressure member 3 and the lower support The abutment force of the upper pressure member 2 on the two ends of the pipe fitting can avoid the leakage of compressed gas in the initial stage of the pressure increase in the pipe fitting, and when the sliding sleeve 26 abuts against the stop block 22 at one end of the staggered shaft 23, the sliding sleeve 26 can drive the sealing plug 20 to move inside the pump cylinder 19 through the connecting shaft 21, and compress the air in the pump cylinder 19, so that the pressure in the closed chamber formed by the pump cylinder 19, the flexible conduit 24 and the pipe fitting is increased, and in this process, the secondary pressure component follows the action, further increasing the abutment force of the upper pressure member 3 and the lower support member 2 on the two ends of the pipe fitting, at this time:

[0065] Due to the increase in pressure inside the pipe, the compressed air can act on the inner wall of the pipe, and has a supporting force on the inner wall of the pipe, and the greater the pressure, the greater the supporting force of the compressed air on the inner wall of the pipe. In the above process, the degree of compression of the gas is positively correlated with the abutment force of the upper pressure member 3 and the lower support member 2 on the two ends of the pipe. As the pressure inside the pipe increases, the compressed gas can act on the inner wall of the pipe and the pipe will not bend or fold under the pressure of the upper pressure member 3 and the lower support member 2, thereby improving the straightness of the pipe during the detection process and avoiding leakage of compressed air caused by the bending of the pipe under pressure, thereby causing detection failure.

[0066] Through the above arrangement, when the electric telescopic rod 25 is actuated, the secondary pressure component will be actuated first, and the abutting force of the upper pressure member 3 on the upper end of the pipe will be increased, so that the pipe can obtain a better sealing effect to prevent the leakage of compressed gas in the initial stage of the pressure increase in the pipe, and improve the airtightness of both ends of the pipe. At the same time, when the sealing plug 20 and the connecting plate 28 move synchronously, the degree of gas compression can be positively correlated with the abutting force of the upper pressure member 3 and the lower support member 2 on the two ends of the pipe. As the pressure in the pipe increases, the compressed gas can act on the inner wall of the pipe, and the pipe will not bend or fold under the pressure of the upper pressure member 3 and the lower support member 2, thereby improving the straightness of the pipe during the detection process and avoiding the leakage of compressed air caused by the bending of the pipe under pressure, which leads to detection failure.

[0067] It should be noted that a pressure gauge (not shown in the figure) is connected to one end of the pump cylinder 19 close to the flexible conduit 24. When the air pressure in the pump cylinder 19 reaches a preset value, the air pressure in the pipe also reaches a preset value. At this time, the electric telescopic rod 25 is controlled to stop and maintain, and then the pressure resistance of the pipe is judged by observing whether the air pressure indication number changes.

[0068] See also Figure 1 , Figure 2 , Figure 6 , Figure 7 The secondary pressure component is connected to the slider 27, and the secondary pressure component can cooperate with the coaxial roller group when the upper pressure member 3 applies pressure to one end of the pipe, thereby increasing the force of the upper pressure member 3 acting on the end of the pipe;

[0069] The secondary pressure-applying assembly includes a horizontally arranged transverse frame 31, the transverse frame 31 is connected to the support frame 1 through a telescopic rod, and one end of the transverse frame 31 is provided with a second inclined guide surface 3101 adapted to the second abutment wheel 10, specifically, the telescopic rod includes a guide sleeve 33 connected to the support frame 1 and a guide rod 32 connected to the transverse frame 31, and the guide rod 32 is slidably fitted with the guide sleeve 33;

[0070] A transverse shaft 29 is also installed in the transverse frame 31, and the transverse shaft 29 is slidably connected to the connecting plate 28, and a second columnar spring 30 is sleeved on the transverse shaft 29, one end of the second columnar spring 30 is connected to the side wall of the transverse frame 31, and the other end is connected to the connecting plate 28.

[0071] When the electric telescopic rod 25 moves, it can drive the connecting plate 28 to move. At this time, the connecting plate 28 can drive the transverse frame 31 to move along the length direction of the guide sleeve 33 toward the second abutment wheel 10 through the support of the second column spring 30. When the second abutment wheel 10 abuts against the second inclined guide surface 3101, the second abutment wheel 10 will be subjected to downward pressure. At this time, when the connecting plate 28 continues to move, the second column spring 30, which is in a compressed state in the initial state, will be further compressed. The columnar spring 30 will act in the opposite direction to the transverse frame 31 to increase the downward pressure exerted on the No. 2 abutment wheel 10, thereby increasing the abutment force exerted by the upper pressure member 3 on the upper end of the pipe fitting. At this time, the elastic forces of the No. 2 columnar spring 30 and the No. 1 columnar spring 8 act on the No. 2 abutment wheel 10 and the No. 1 abutment wheel 9 respectively, thereby generating a synergistic force, so that the upper pressure member 3 increases the force exerted on the upper end of the pipe fitting, thereby increasing the pressure inside the pipe fitting, thereby ensuring the sealing effect and the supporting force of the pipe fitting itself.

[0072] It should be noted that the stiffness of the No. 2 columnar spring 30 is greater than that of the No. 1 columnar spring 8, and the setting of the No. 2 columnar spring 30 can maintain a soft connection state between the connecting plate 28 and the transverse frame 31, avoiding a rigid connection between the two and directly acting on the No. 2 abutment wheel 10, resulting in excessive downward force of the upper pressure member 3, causing the pipe to collapse and bend.

[0073] Through the above arrangement, when the connecting plate 28 moves, the No. 1 columnar spring 8 and the No. 2 columnar spring 30 can act on the No. 1 abutment wheel 9 and the No. 2 abutment wheel 10 respectively, and generate a synergistic force. Therefore, under the action of the two, the upper pressure member 3 can increase the force on the upper end of the pipe fitting, so that when the pressure inside the pipe fitting is increased, the sealing effect and the supporting force of the pipe fitting itself are guaranteed.

[0074] See also Figure 2 , Figure 4 , Figure 5 , a urea pipe pressure test device, also includes: two sets of arc-shaped grille guard plates 16, a transverse plate 14 and a traction structure.

[0075] Two sets of arc-shaped grille guard plates 16 are rotatably mounted on the support frame 1, and the two sets of arc-shaped grille guard plates 16 remain coaxial with the pipe fitting when closed;

[0076] The transverse plate 14 is arranged on the support frame 1, and an engaging groove is formed on the transverse plate 14. The engaging wheel 13 connected to the follower sleeve plate 6 through the connecting rod 12 can roll in the engaging groove, and can drive the transverse plate 14 to move toward or away from the support frame 1 when the height of the upper pressure member 3 changes;

[0077] The interlocking groove comprises two groups of vertical groove bodies 1401 staggeredly arranged on the transverse displacement plate 14, and the two groups of vertical groove bodies 1401 are connected through an inclined groove body 1402;

[0078] The traction structure connects the transverse plate 14 and the arc-shaped grille guard plate 16, and the traction structure can open or close the two groups of the arc-shaped grille guard plates 16 when the transverse plate 14 moves;

[0079] The traction structure includes an extension rod 17 connected to the rotating shaft of the arc-shaped grille guard plate 16, and a pulley 18 is rotatably mounted on the end of the extension rod 17;

[0080] The traction structure further includes a pulling frame 15 slidably arranged through the support frame 1 , one end of the pulling frame 15 is provided with a transverse groove 1501 , the pulley 18 can roll in the transverse groove 1501 , and the other end of the pulling frame 15 is connected to the transverse plate 14 .

[0081] When the No. 1 abutment wheel 9 is on the No. 1 inclined guide surface 1101 at the top, the engaging wheel 13 is at the upper end of the upper vertical slot 1401, and the transverse plate 14 is close to the support frame 1, so that the two pulleys 18 arranged in the transverse slot 1501 are close to each other, and the two arc-shaped grille guard plates 16 are in an open state, so as to facilitate the loading and removal of pipes. After placing the pipes on the lower support member 2, the upper pressure member 3 is pulled down, and the No. 1 abutment wheel 9 can move from the No. 1 inclined guide surface 1101 at the top to the No. 1 inclined guide surface 1101 at the bottom. , and drives the engaging wheel 13 to move from the upper vertical trough 1401 to the lower vertical trough 1401 through the inclined trough 1402, so that in this process, the transverse plate 14 will move away from the support frame 1 and pull the pulling frame 15 to move. At this time, the two pulleys 18 will move away from each other along the length direction of the transverse groove 1501, and drive the two arc-shaped grille guard plates 16 to rotate through the extension rod 17 until the two are closed to form a protective cover on the outside of the pipe fitting, thereby avoiding the danger of the pipe fitting bursting and splashing due to the increase in internal pressure during the detection process, thereby improving the safety of the detection process.

[0082] Through the above-mentioned arrangement, when the upper pressure member 3 is away from the lower support frame 1 for loading of pipes, the two arc-shaped grille guards 16 can remain in an open state to facilitate loading and disassembly of pipes. After the pipes are placed on the lower support member 2, when the upper pressure member 3 moves downward and abuts against the upper end of the pipes, the two arc-shaped grille guards 16 can close and form an annular protective cover to avoid the danger of the pipes bursting and breaking due to the increase in internal pressure and the splashing of broken parts during the inspection process, thereby improving the safety of the inspection process.

[0083] As an embodiment of the present invention, a method for testing the pressure resistance performance of a urea pipe using the testing device is also proposed, comprising the following steps:

[0084] Step 1: Push the upper pressure member 3 upward, and under the action of the primary pressure assembly, the upper pressure member 3 is in a state away from the lower support member 2. At this time, the engaging wheel 13 cooperates with the engaging groove to enable the transverse plate 14 to be away from the support frame 1, and the two sets of arc-shaped grille guard plates 16 are opened through the traction structure;

[0085] Step 2: Place the pipe to be tested on the lower support 2, then pull down the upper pressure member 3, so that the end of the pipe to be tested abuts against the sealing gasket 4 on the lower support 2 and the upper pressure member 3, and at this time, the two sets of arc-shaped grille guard plates 16 are closed;

[0086] Step 3: Control the driving source to move. At this time, the driving source will first drive the secondary pressure component to move, acting on the primary pressure component, so that the force of the upper pressure component 3 acting on the pipe to be tested increases, and then the driving source cooperates with the staggered part to drive the pump gas component to move, and inject compressed gas into the pipe to be tested;

[0087] Step 4: The driving source continues to operate, so that the force of the upper pressure member 3 acting on the pipe to be tested continues to increase, and at the same time, the pump assembly causes the pressure inside the pipe to be tested to continuously increase, until the pressure inside the pipe to be tested reaches a preset value, and the driving source stops operating and maintains;

[0088] Step 5: Observe the pressure changes inside the pipe to be tested and complete the test.

[0089] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0090] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A urea pipe pressure test device, characterized in that: include: A support frame (1), the support frame (1) being provided with a lower support member (2) and an upper pressure member (3) which cooperate with each other to clamp two ends of the pipe fitting, and a sealing gasket (4) is provided on the side of the lower support member (2) and the upper pressure member (3) facing the pipe fitting; a primary pressure component, arranged on the support frame (1) and connected to the upper pressure member (3), the primary pressure component comprising an energy storage structure and a guide member (11), wherein a coaxial roller group connected to the energy storage structure cooperates with the guide member (11) to enable the upper pressure member (3) to have a tendency to move toward or away from the lower support member (2); A pump air component is connected to the upper pressure member (3), one end of the pump air component is formed with a staggered portion, the staggered portion is connected to a driving source arranged on the support frame (1), and after the driving source moves to a predetermined position, the pump air component can follow the driving source to move; A secondary pressure component connected to the driving source, the secondary pressure component being capable of cooperating with the coaxial roller assembly when the upper pressure component (3) applies pressure to one end of the pipe, thereby increasing the force of the upper pressure component (3) acting on the end of the pipe; The energy storage structure comprises a sliding connection part (5) sliding in a No. 1 slide groove (101) provided on the support frame (1), one end of the sliding connection part (5) is connected to the upper pressure member (3), and the other end is provided with a follower sleeve (6), a telescopic plate (7) is slidably installed in the follower sleeve (6), and the telescopic plate (7) is connected to the sliding connection part (5) via a No. 1 columnar spring (8); The coaxial roller wheel group comprises a first abutment wheel (9) and a second abutment wheel (10) which are connected to the telescopic plate (7) and are coaxially arranged; The secondary pressure-applying assembly comprises a horizontally arranged transverse frame (31), the transverse frame (31) being connected to the support frame (1) via a telescopic rod, and one end of the transverse frame (31) being provided with a second inclined guide surface (3101) adapted to the second abutment wheel (10); Also includes: Two sets of arc-shaped grille guard plates (16) are rotatably mounted on the support frame (1), and the two sets of arc-shaped grille guard plates (16) remain coaxial with the pipe fitting when closed; A transverse plate (14) is arranged on the support frame (1), and an engaging groove is formed on the transverse plate (14). An engaging wheel (13) connected to the follower sleeve (6) via a connecting rod (12) can roll in the engaging groove, and can drive the transverse plate (14) to move toward or away from the support frame (1) when the height of the upper pressure member (3) changes; A traction structure is connected to the transverse plate (14) and the arc-shaped grille guard plate (16), and the traction structure can open or close the two groups of the arc-shaped grille guard plates (16) when the transverse plate (14) moves.

2. A urea pipe pressure test device according to claim 1, characterized in that: The guide member (11) is mounted on the support frame (1), and a side of the guide member (11) away from the follower sleeve (6) is formed by two groups of No. 1 inclined guide surfaces (1101), and a convex portion (1102) is formed at the connection between the two groups of No. 1 inclined guide surfaces (1101), and the No. 1 abutment wheel (9) can roll between the two No. 1 inclined guide surfaces (1101) via the convex portion (1102).

3. The urea pipe pressure test device according to claim 1, characterized in that: The pump air assembly comprises a pump cylinder body (19) mounted on the support frame (1), one end of the pump cylinder body (19) being connected to the upper pressure member (3) via a flexible conduit (24), and a sealing plug (20) being sealingly slidably mounted inside the pump cylinder body (19), the sealing plug (20) being connected to a connecting shaft (21) penetrating the pump cylinder body (19), and one end of the connecting shaft (21) away from the sealing plug (20) being connected to the mismatching portion; The mismatched portion comprises a mismatched shaft (23) coaxially fixed to the connecting shaft (21), and stop blocks (22) are provided at both ends of the mismatched shaft (23).

4. A urea pipe pressure test device according to claim 3, characterized in that: The driving source comprises a sliding block (27) sliding in a second sliding groove (102) provided on the support frame (1), the sliding block (27) being provided with a sliding sleeve (26) slidably connected to the misaligned shaft (23), and the sliding block (27) being provided with a connecting plate (28) connected to a secondary pressure-applying component; An electric telescopic rod (25) mounted on the support frame (1) is connected to the sliding block (27) and the sliding sleeve (26); A transverse shaft (29) is also installed in the transverse frame (31), and the transverse shaft (29) is slidably connected to the connecting plate (28). A second columnar spring (30) is sleeved on the transverse shaft (29), and one end of the second columnar spring (30) is connected to the side wall of the transverse frame (31), and the other end is connected to the connecting plate (28).

5. The urea pipe pressure test device according to claim 1, characterized in that: The engaging groove comprises two groups of vertical groove bodies (1401) staggeredly arranged on the transverse displacement plate (14), and the two groups of vertical groove bodies (1401) are connected via an inclined groove body (1402).

6. The urea pipe pressure test device according to claim 1, characterized in that: The traction structure comprises an extension rod (17) connected to the rotating shaft of the arc-shaped grille guard plate (16), and a pulley (18) is rotatably mounted on the end of the extension rod (17); The traction structure further comprises a pulling frame (15) slidably arranged through the support frame (1), one end of the pulling frame (15) being provided with a transverse groove (1501), the pulley (18) being capable of rolling in the transverse groove (1501), and the other end of the pulling frame (15) being connected to the transverse plate (14).

7. A method for testing the pressure resistance of a urea pipe using the testing device according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: Pushing the upper pressure member (3) upward, under the action of the primary pressure assembly, the upper pressure member (3) is placed away from the lower support member (2), at which time the engaging wheel (13) cooperates with the engaging groove to place the transverse moving plate (14) away from the support frame (1), and the two sets of arc-shaped grille guard plates (16) are opened through the traction structure; Step 2: Place the pipe to be tested on the lower support member (2), then pull down the upper pressure member (3) so that the end of the pipe to be tested abuts against the sealing gasket (4) on the lower support member (2) and the upper pressure member (3), and at this time, the two sets of arc-shaped grille guard plates (16) are closed; Step 3: Control the driving source to move. At this time, the driving source will first drive the secondary pressure component to move, acting on the primary pressure component, so that the force of the upper pressure component (3) acting on the pipe to be tested increases, and then the driving source cooperates with the mismatching part to drive the pump gas component to move, thereby injecting compressed gas into the pipe to be tested; Step 4: The driving source continues to operate, so that the force exerted by the upper pressure member (3) on the pipe to be tested continues to increase, and at the same time, the pump assembly causes the pressure inside the pipe to be tested to continuously increase, until the pressure inside the pipe to be tested reaches a preset value, and then the driving source stops operating and maintains the pressure; Step 5: Observe the pressure changes inside the pipe to be tested and complete the test.

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