Testing equipment for heating pipe

Abstract

The utility model belongs to the technical field of testing, and particularly discloses testing equipment for a heating pipe. The test equipment comprises a clamping assembly and a driving assembly. The two clamping assemblies are oppositely arranged at intervals in the first direction, medium channels are formed in the two clamping assemblies, one medium channel is provided with a medium inlet, the other medium channel is provided with a medium outlet, and the medium outlet can be opened or closed; the driving assembly drives one clamping assembly to move in the direction towards the other clamping assembly, so that the heating pipe is clamped between the two clamping assemblies, and an inner cavity of the heating pipe is communicated with the two medium channels in a sealed mode to form a medium testing channel. The test automation degree is improved, and the test reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of testing, in particular to a testing device for a heating tube. Background Art

[0002] The tubular heating body can generate heat by being powered on to heat the water flowing through its inner cavity. Due to its small size and fast heating, it is widely used in instant water dispensers, electric water tanks or other equipment that requires hot water supply.

[0003] Tubular heaters usually include thick film heaters, nano quartz tube heaters, nano stainless steel heaters, etc., which include a tube body with openings at both ends and an electric heating component arranged on the tube body. In order to ensure the normal use of the tubular heater, it is usually necessary to perform a series of tests such as pressure resistance, cold and hot shock on the tubular heater before production to ensure the product yield of the tubular heater. In the prior art, different test equipment is usually used to complete a series of tests such as pressure resistance, cold and hot shock, etc., and it is necessary to manually complete multiple clamping of the heater on different test equipment, which affects the test efficiency of the tubular heater. At the same time, multiple clamping causes damage to the surface coating of the heater.

[0004] Therefore, there is an urgent need for a testing device for a tubular heating body to solve the above technical problems. Utility Model Content

[0005] The technical problem solved by the utility model is to provide a testing device for a heating tube, which can effectively solve the problems of low testing efficiency and inconvenient testing of existing heating tubes, and improve the testing efficiency and convenience of the heating tubes.

[0006] The above technical problems are solved by the following technical solutions:

[0007] A testing device is applied to a heating tube with openings at both ends, the testing device comprising:

[0008] Two clamping assemblies are arranged opposite to each other and spaced apart in a first direction, and medium channels are provided inside the two clamping assemblies, one of the medium channels has a medium inlet, and the other medium channel has a medium outlet, and the medium outlet can be opened or closed;

[0009] A driving assembly drives one of the clamping assemblies to move in a direction toward the other clamping assembly, so that the heating tube is clamped between the two clamping assemblies and the inner cavity of the heating tube is sealed and connected with the two medium channels to form a medium test channel;

[0010] The testing device has a first medium flow state and a second medium flow state. When the testing device is in the first medium flow state, the medium outlet is opened so that the medium can flow through the medium test channel through the medium inlet and then be discharged from the medium outlet; when the testing device is in the second medium flow state, the medium outlet is closed so that the medium can be retained in the medium test channel.

[0011] Compared with the background technology, the testing device for the heating tube of the utility model has the following beneficial effects: by driving a clamping component to move in a direction toward another clamping component through a driving component, the heating tube can be clamped and tightened, ensuring that the heating tube does not shake during the test, improving the test reliability and realizing the automation of the clamping of the heating tube; at the same time, after the heating tube is clamped, the two end ports of the heating tube are sealed and connected with the two medium channels, and the medium outlet can be selectively closed or opened to avoid the leakage of the heating tube to the external environment of the testing device during the test, and the medium can be added to the inside of the heating tube during the test, so that the testing device can meet the test of continuous flow of the medium in the heating tube, and can also meet the test of keeping the medium roughly still in the heating tube, such as sealing test, etc., thereby increasing the diversity of heating tube testing, increasing the comprehensiveness of heating tube testing, and improving the versatility and test reliability of the testing device.

[0012] In one embodiment, the clamping assembly comprises:

[0013] A clamping seat, wherein the clamping seat is provided with the medium channel;

[0014] A sealing head is arranged on the side of the clamping seat facing the other clamping assembly, and a connecting channel is opened through the sealing head along the first direction, and the connecting channel is connected with the medium channel. The two sealing heads arranged opposite to each other in the first direction cooperate to clamp the heating tube, and the connecting channel is used to communicate with the inner cavity of the heating tube.

[0015] In one embodiment, a plug-in structure is provided on the side of the sealing head facing the other clamping assembly, and the plug-in structure includes a plug-in ring groove, and the plug-in ring groove is used for inserting the end of the heating tube, and the connecting channel is located on the inner side of the plug-in ring groove.

[0016] In one embodiment, the plug-in ring groove includes a coaxially connected limit groove portion and a guide groove portion, the guide groove portion is located on the side of the limit groove portion facing the other sealing head, and the groove width of the guide groove portion gradually increases in the direction away from the limit groove portion.

[0017] In one embodiment, the sealing head includes a sealing seat and a fastener, the sealing seat is installed on the clamping seat, the fastener passes through the sealing seat and is connected to the inner wall of the medium channel, the fastener is provided with the connecting channel, and the sealing seat is used to clamp the heating tube.

[0018] In one embodiment, a mounting groove is provided on a side of the clamping seat facing the other clamping assembly, the mounting groove is arranged in a one-to-one correspondence with the sealing head, the medium channel is communicated with the mounting groove, and the sealing head is sealingly installed in the mounting groove;

[0019] And / or, the sealing head protrudes out of the clamping seat toward one side of the other clamping assembly.

[0020] In one embodiment, each of the clamping seats is provided with a plurality of sealing heads spaced apart along a second direction, the sealing heads of the two clamping assemblies are provided in one-to-one correspondence, and the second direction is perpendicular to the first direction;

[0021] The medium channel includes a main channel and multiple branch channels, and the multiple branch channels are arranged in a one-to-one correspondence with the multiple sealing heads, and each of the branch channels is connected to the main channel and the connecting channel corresponding to the sealing head. One end of the main channel is open to the corresponding medium inlet or the medium outlet.

[0022] In one embodiment, the testing device also includes a support seat, which is located between the two clamping assemblies and fixed relative to one of the clamping assemblies. A support groove is opened on one side of the support seat along the first direction, and the groove wall of the support groove is used to cooperate with the tube wall of the heating tube.

[0023] In one embodiment, one of the two media channels is a media inlet channel, and the other is a media outlet channel, a port at one end of the media inlet channel forms the media inlet, and a port at one end of the media outlet channel forms the media outlet, and the test device includes a main control board;

[0024] The testing equipment also includes a first control valve, which is installed at the medium outflow channel and is used to control the on and off of the medium outlet, and the first control valve is communicatively connected to the main control board; and / or, the testing equipment also includes a detection component and a main control board, the detection component is arranged at the medium inlet channel and is communicatively connected to the main control board, and the detection component includes a temperature detection component and / or a pressure detection component.

[0025] In one embodiment, the testing device further includes a second control valve, which is installed at the medium inlet channel and is used to control the on-off of the medium inlet, and the second control valve is communicatively connected to the main control board.

[0026] In one embodiment, one of the clamping seats is a fixed clamping seat, and the other clamping seat is a movable clamping seat, the fixed clamping seat is connected to a mounting seat, and the driving assembly is mounted on the mounting seat;

[0027] The testing device also includes a control panel, which is mounted on the mounting base. The driving assembly is electrically connected to the control panel, and the control panel can control the on and off of the heating tube.

[0028] In one of the embodiments, a wiring seat is provided on one of the clamping seats, the wiring seat is electrically connected to the control panel, and the wiring seat is used to be electrically connected to the wiring of the heating tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of the test equipment provided by the embodiment of the utility model;

[0030] Figure 2 A cross-sectional view of a test device provided by an embodiment of the utility model;

[0031] Figure 3 for Figure 2 A partial enlarged view of point I in the middle;

[0032] Figure 4 A schematic diagram of the disassembled structure of the test equipment provided in an embodiment of the utility model.

[0033] Figure 5 A side view of a testing device provided in an embodiment of the present utility model.

[0034] Description of labels:

[0035] 1. Clamping seat; 1a. Fixed clamping seat; 1b. Movable clamping seat; 11. Medium channel; 11a. Medium inlet channel; 11b. Medium outlet channel; 111. Main channel; 112. Branch channel; 12. Butt-joint pipe;

[0036] 2. Sealing head; 21. Sealing seat; 211. Main seat portion; 212. Boss portion; 213. Insertion ring groove; 2131. Limiting groove portion; 2132. Guide groove portion; 214. Fastening through hole; 22. Fastener; 221. Communication channel;

[0037] 3. Sliding guide assembly; 31. Guide rod; 32. Sliding guide sleeve; 33. Fixed guide sleeve;

[0038] 4. mounting seat; 41. connecting portion; 411. positioning groove; 42. mounting portion;

[0039] 5. Control panel; 51. Display screen; 52. Wiring connector;

[0040] 6. Support seat; 61. Support groove;

[0041] 7. Limiting component; 8. Terminal block; 9. First control valve; 10. Detection component; 20. Driving assembly; 100. Heating tube; 101. Tube body; 102. Connecting wires. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0044] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0045] In the description of this application, 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 this application can be understood according to specific circumstances.

[0046] This embodiment provides a testing device for a heating tube, which can be used to automatically detect the performance of the heating tube to improve the detection efficiency and detection reliability.

[0047] like Figure 1 and Figure 2 As shown, the test device includes a clamping assembly and a driving assembly 20. Two clamping assemblies are arranged opposite to each other and spaced apart in a first direction, and a medium channel 11 is provided inside the two clamping assemblies, one medium channel 11 has a medium inlet, and the other medium channel 11 has a medium outlet, and the medium outlet can be opened or closed; the driving assembly 20 drives one clamping assembly to move in a direction toward the other clamping assembly, so that the heating tube 100 is clamped between the two clamping assemblies and the inner cavity of the heating tube 100 is sealed and connected with the two medium channels 11 to form a medium test channel; the test device has a first medium flow state and a second medium flow state, and when the test device is in the first medium flow state, the medium outlet is opened, so that the medium can flow through the medium inlet through the medium test channel and then be discharged from the medium outlet; when the test device is in the second medium flow state, the medium outlet is closed, so that the medium can be retained in the medium test channel.

[0048] For the convenience of description, the clamping assembly connected to the driving assembly 20 is called an active clamping assembly, and the other clamping assembly is called a fixed clamping assembly. The channel for medium entry in the two medium channels 11 is the medium entry channel 11a, and the channel for medium outflow is the medium outflow channel 11b. The medium entry channel is connected to the medium inlet, and the medium outflow channel 11b is connected to the medium outlet.

[0049] The heating tube 100 testing device provided in the present embodiment, when testing the heating tube 100, firstly, the first end of the heating tube 100 is installed on the fixed clamping assembly; then, the driving assembly 20 drives the movable clamping assembly to move in the direction toward the fixed clamping assembly, so that the heating tube 100 is clamped between the two clamping assemblies, and the inner cavity of the heating tube 100 is connected with the two medium channels 11 respectively; thereafter, the heating tube 100 can be electrically heated, or the medium can be introduced into the medium channel 11 through the medium inlet to perform heating, cooling or pressure-maintaining tests on the heating tube 100, so as to detect the performance of the heating tube 100.

[0050] That is, the test equipment provided in this embodiment can clamp and tighten the heating tube 100 by driving a clamping assembly to move in a direction toward another clamping assembly through the driving assembly 20, thereby ensuring that the heating tube 100 does not shake during the test process, improving the test reliability, and realizing the automation of clamping the heating tube 100; at the same time, after the heating tube 100 is clamped, the two end ports of the heating tube 100 are sealed and connected with the two medium channels 11, and the medium outlet can be selectively closed or opened to prevent the heating tube 100 from leaking to the external environment of the test equipment during the test process, and the medium can be added to the inside of the heating tube 100 during the test process, so that the test equipment can meet the test of the medium continuously flowing in the heating tube 100, and can also meet the test of the medium remaining approximately still in the heating tube 100, such as the sealing test, etc., thereby increasing the diversity of the test of the heating tube 100, increasing the comprehensiveness of the test of the heating tube 100, and improving the versatility and test reliability of the test equipment.

[0051] The clamping assembly connected to the driving assembly 20 is called a movable clamping seat 1b, and the other clamping seat 1 is called a fixed clamping seat 1a. The channel for medium entry in the two medium channels 11 is the medium entry channel 11a, and the channel for medium outflow is the medium outflow channel 11b.

[0052] In order to improve the clamping reliability and safety of the heating tube 100, in one embodiment, the clamping assembly includes a clamping seat 1 and a sealing head 2 which are separately arranged. The clamping seat 1 is provided with a medium channel 11; the sealing head 2 is arranged on the side of the clamping seat 1 facing the other clamping assembly, and the sealing head 2 is provided with a connecting channel 221 through it along a first direction, and the connecting channel 221 is connected with the medium channel 11. The two sealing heads 2 which are arranged opposite to each other in the first direction cooperate to clamp the heating tube 100, and the connecting channel 221 is used to communicate with the inner cavity of the heating tube 100. By setting up a separate clamping seat 1 and a sealing head 2, the sealing head 2 can be made of an elastic sealing material, so as to facilitate the clamping of the heating tube 100 and avoid the problem of damage to the heating tube 100 caused by a hard collision between the clamping assembly and the heating tube 100, thereby improving the clamping safety of the heating tube 100; at the same time, the clamping seat 1 can be made of a hard material that is conducive to installation and fixation, so as to ensure the overall rigidity of the clamping assembly, improve the convenience of connecting the clamping assembly with other structures, and improve the reliability of the movement of the clamping assembly along the first direction.

[0053] For the convenience of subsequent description, the clamping seat 1 in the movable clamping assembly is referred to as a movable clamping seat 1b, and the clamping seat 1 in the fixed clamping assembly is referred to as a fixed clamping seat 1a.

[0054] In order to improve the convenience of setting the driving assembly 20, the fixed clamping seat 1a is connected with a mounting seat 4, and the driving assembly 20 is installed on the mounting seat 4 and is drivingly connected to the movable clamping seat 1b. Preferably, the mounting seat 4 includes a connecting portion 41 and a mounting portion 42 connected to each other, and the mounting portion 42 is arranged opposite to and spaced from the fixed clamping seat 1a in the first direction, and the connecting portion 41 is connected between the mounting portion 42 and the fixed clamping seat 1a. The movable clamping seat 1b is located between the mounting seat 4 and the fixed clamping seat 1a, and the driving assembly 20 is installed on the mounting portion 42, and the driving assembly 20 has a driving component that can reciprocate along the first direction, and the driving component is connected to the movable clamping seat 1b to drive the movable clamping seat 1b to move along the first direction.

[0055] The structural setting of the mounting seat 4 can improve the installation convenience of the driving assembly 20 and reduce the interference between the driving assembly 20 and the heating tube 100; at the same time, this setting is conducive to ensuring the driving stability of the movable clamping seat 1b. Preferably, the fixed clamping seat 1a, the connecting portion 41 and the mounting portion 42 are connected to form a U-shaped structure. In other embodiments, the mounting seat 4 may also include only the connecting portion 41, and the driving assembly 20 is installed on the connecting portion 41.

[0056] In one embodiment, the driving assembly 20 includes a driving piston cylinder, which includes a cylinder body and a piston rod that can be extended and retracted along a first direction, the piston rod forming the above-mentioned driving component, and the cylinder body is mounted on the mounting seat 4. Specifically, the cylinder body is mounted on a side of the mounting portion 42 away from the fixed clamping seat 1a to improve the convenience of disassembly and assembly of the cylinder body. The driving piston cylinder is preferably a gas cylinder to reduce costs. In other embodiments, the driving piston cylinder may also be a hydraulic cylinder.

[0057] In another embodiment, the drive assembly 20 may also adopt other structural forms, for example, the drive assembly 20 includes a motor and a lead screw nut assembly, the lead screw of the lead screw nut assembly is arranged along the first direction and mounted on the mounting seat 4, the drive motor is mounted on the mounting seat 4 and connected to one end of the lead screw to drive the lead screw to rotate; the nut seat is fixedly mounted on the movable clamping seat 1b and cooperates with the lead screw transmission. The mounting seat 4 is provided with a limit structure for limiting the rotation of the movable clamping seat 1b.

[0058] It is worth noting that the structure of the above-mentioned driving component 20 is only an exemplary structure. The existing structural forms of the driving component 20 that can realize the movement of the movable clamping seat 1b in the direction of approaching or moving away from the fixed clamping seat 1a can be applied to this embodiment. This embodiment does not limit the specific structure of the driving component 20.

[0059] In one embodiment, the test device further includes a control panel 5, the control panel 5 is mounted on the mounting base 4, the drive assembly 20 is electrically connected to the control panel 5, and the control panel 5 can control the power on and off of the heating tube 100. By providing the control panel 5, the test device can be conveniently controlled and the test flexibility can be improved.

[0060] Specifically. The control panel 5 includes a main control board, a display screen 51, a connector 52 and a control component. Among them, the display screen 51 and the drive assembly 20 are both connected to the main control board for communication, and the display screen 51 is used to display the test parameters and / or test results; the control component is used to realize human-computer interaction, so that the user can adjust the test parameters and / or the test process through the control component, thereby improving the test flexibility and convenience of the test equipment; the connector 52 is used to be electrically connected to the drive assembly 20 and the heating tube 100 to improve the convenience of wiring. It can be understood that the structure of the control panel 5 capable of realizing human-computer interaction can be set with reference to the prior art. This is not the focus of this embodiment and will not be repeated here.

[0061] In one embodiment, the control panel 5 is connected between the mounting portion 42 and the fixed clamping seat 1a and is disposed perpendicular to the connecting portion 41. In another embodiment, the control panel 5 can also be installed on the connecting portion 41.

[0062] In one embodiment, each clamping seat 1 is provided with a plurality of sealing heads 2 in parallel and at intervals along the second direction, and the sealing heads 2 of the two clamping assemblies are provided in a one-to-one correspondence, and the number of sealing heads 2 corresponds to the number of heating tubes 100 to be tested, thereby increasing the number of heating tubes 100 that can be tested simultaneously by the test equipment, improving the test efficiency, and reducing the test cost. The number of sealing heads 2 can be adaptively designed according to the test requirements, and this embodiment does not limit the number of heating tubes 100 that can be tested by the test equipment at a time.

[0063] In order to improve the convenience of simultaneously introducing the medium into the interior of multiple heating tubes 100, in one embodiment, each medium channel 11 includes a main channel 111 and a branch channel 112. One end of the main channel 111 is open to form a corresponding medium inlet or medium outlet. The first end of each branch channel 112 is connected to the main channel 111, and each branch channel 112 is sealed and connected to the connecting channel 221 of the corresponding sealing head 2. Therefore, when the medium channel 11 is a medium inlet channel 11a, the medium enters the main channel 111 and is dispersed into the multiple branch channels 112, and flows to the corresponding connecting channel 221 and the interior of the heating tube 100 through the branch channels 112 in sequence; when the medium channel 11 is a medium outlet channel 11b, the medium flowing out of the heating tube 100 is converged into the main channel 111 through the connecting channel 221 and the branch channels 112 in sequence, and flows out through the medium outlet of the main channel 111.

[0064] The arrangement of the medium channel 11 facilitates the supply of the medium to the multiple heating tubes 100 and the recovery of the medium flowing out of the heating tubes 100; at the same time, the arrangement can ensure the consistency of the medium pressure in the multiple branch channels 112, and ensure the consistency and reliability of the test of the multiple heating tubes 100. In other embodiments, a separate medium channel 11 may be arranged for each sealing head 2.

[0065] In one embodiment, the main channel 111 extends along the second direction and the first end passes through the clamping seat 1 to improve the convenience of setting the main channel 111; the branch channel 112 extends along the second direction and the second end passes through the surface of the corresponding clamping seat 1 to facilitate the connection between the connecting channel 221 and the branch channel 112, and improve the processing convenience of the branch channel 112.

[0066] The first end of the clamping seat 1 corresponding to the medium channel 11 is provided with a butt joint pipe portion 12 extending outwardly along the first direction, and the butt joint pipe portion 12 is used to connect with the medium supply device or the medium recovery device. The inner cavity of the butt joint pipe portion 12 forms the first end of the medium channel 11. The butt joint pipe portion 12 can be integrally formed, welded, or detachably connected with the main structure of the corresponding clamping seat 1.

[0067] In order to further improve the automation and efficiency of the test of the heating tube 100, in one embodiment, the test equipment also includes a first control valve 9, which is installed at the medium outflow channel 11b and is used to control the on-off of the medium outlet. The first control valve 9 is connected to the main control board in the control panel. By setting the first control valve 9, the on-off of the medium outflow channel 11b can be controlled, so that when the medium is introduced into the heating tube 100 and the first control valve 9 is disconnected, the pressure inside the heating tube 100 can be maintained, which is conducive to the pressure maintenance test and sealing test of the heating tube 100.

[0068] Furthermore, the test device further includes a second control valve, which is installed in the medium inlet channel 11a and is used to control the on-off of the medium inlet, thereby facilitating the blocking of both ends of the medium test channel and improving the blocking reliability of the medium test channel. In other embodiments, the test device may not be provided with a second control valve, and the medium flow at the medium inlet is controlled by the medium supply pipeline.

[0069] In another embodiment, the first control valve 9 may also be a mechanical valve. In another embodiment, the medium outlet may also be manually blocked by a plug.

[0070] Further, the butt joint pipe portion 12 of the medium inlet channel 11 a is a first butt joint pipe portion 12 , the butt joint pipe portion 12 of the medium outlet channel 11 b is a second butt joint pipe portion 12 , and the first control valve 9 is disposed at the second butt joint pipe portion 12 .

[0071] The test device also includes a detection member 10, which is arranged in the medium inlet channel 11a and is connected to the main control board for communication. The detection member 10 includes a temperature detection member 10 and / or a pressure detection member. By setting the detection member 10, the temperature and / or pressure of the medium flowing into the medium inlet channel 11a can be detected to better meet the test requirements. Further, the detection member 10 is arranged in the first butt joint portion 12.

[0072] The heating tube 100 includes a tube body 101, an electric heating structure arranged on the tube wall of the tube body 101, and a connecting wire 102 connected to both ends of the electric heating structure. The tube body 101 is sealed and plugged with the sealing head 2, and the connecting wire 102 can be connected to the control circuit to power the electric heating structure. In order to improve the convenience of electrical connection between the main control board and the heating tube 100, in one embodiment, a terminal block 8 is provided on one of the clamping seats 1, and the terminal block 8 is electrically connected to the control panel 5, and the terminal block 8 is used to be electrically connected to the connecting wire 102 of the heating tube 100. Therefore, by disassembling and assembling between the terminal block 8 and the connecting wire 102, the on-off connection between the heating tube 100 and the main control board can be realized, the connection length between the connecting wire 102 and the main control board can be shortened, and the wiring rationality of the test equipment can be improved.

[0073] In one embodiment, the wiring base 8 is arranged on the fixed clamping base 1a, so that the connecting wire between the wiring base 8 and the main control board can always be in a fixed state, so as to avoid the movement of the movable clamping base 1b pulling the connecting wire in the morning, and ensure the reliability and safety of the power connection between the wiring base 8 and the fixed clamping base 1a. In other embodiments, the wiring base 8 can also be arranged on the movable clamping base 1b.

[0074] like Figure 2 and Figure 3 As shown, in order to improve the installation convenience of the sealing head 2, the two clamping seats 1 are provided with installation grooves at one end opposite to each other, and the second end of the branch channel 112 passes through the bottom of the installation groove. The sealing head 2 is sealed and inserted in the installation groove to achieve the installation and positioning of the sealing head 2 on the clamping seat 1, thereby ensuring the installation reliability of the sealing head 2. A plug-in structure is provided on the side of the sealing head 2 away from the bottom of the installation groove.

[0075] The sealing head 2 includes a sealing seat 21 and a fastener 22. The sealing seat 21 is made of elastic materials such as rubber or silicone, and the sealing seat 21 is sealed and inserted in the installation groove; the fastener 22 passes through the sealing seat 21 and is connected to the inner wall of the medium channel 11, and the fastener 22 is provided with a connecting channel 221 along the first direction. With this arrangement, the sealing seat 21 can be installed on the clamping seat 1 through the fastener 22, and the connecting channel 221 can also be provided on the fastener 22, thereby ensuring the convenience of providing the connecting channel 221 and simplifying the installation and connecting structure of the sealing head 2 and the clamping seat 1. In other embodiments, the sealing seat 21 is installed in the sealing groove, and the sealing seat 21 is provided with a connecting channel 221 along the first direction.

[0076] In one embodiment, at least a portion of the inner wall of the branch channel 112 is provided with an internal thread, a fastening through hole 214 is provided on the sealing seat 21 along the first direction, and the fastener 22 is a fastening screw member, which passes through the fastening through hole 214 and is screwed with the internal thread of the branch channel 112, thereby achieving the fastening of the clamping seat 1 and the sealing seat 21 and improving the fastening stability. The fastening through hole 214 is preferably a countersunk hole, and the screw head of the fastening screw member is sunken in the countersunk hole to prevent the fastener 22 from protruding from the sealing seat 21 and causing scratches on the heating tube 100.

[0077] In other embodiments, the end of the fastener 22 may be provided with a first clamping portion, the inner wall of the branch channel 112 may be provided with a second clamping portion, and the first clamping portion and the second clamping portion may be clamped.

[0078] In one embodiment, the plug-in structure includes a plug-in ring groove 213 provided on the end surface of the sealing head 2, and the plug-in ring groove 213 is arranged around the connecting channel 221. The end of the heating tube 100 can be inserted into the plug-in ring groove 213, thereby ensuring the assembly stability of the heating tube 100 and the sealing head 2 while ensuring the sealing performance after the heating tube 100 and the sealing head 2 are connected. In other embodiments, the plug-in structure can also be a convex ring portion convexly provided at the end of the sealing head 2, and the convex ring portion is inserted into one end of the heating tube 100 with interference.

[0079] The plug-in ring groove 213 includes a limiting groove portion 2131 and a guiding groove portion 2132. The guiding groove portion 2132 is located on the side of the limiting groove portion 2131 facing the other sealing head 2, and the groove width of the guiding groove portion 2132 gradually increases in the direction away from the limiting groove portion 2131. The groove width of the limiting groove portion 2131 is equal to the wall thickness of the heating tube 100. The limiting groove portion 2131 is used for sealing and plugging with the heating tube 100, and the guiding groove portion 2132 is used to guide the end of the heating tube 100 to be inserted into the limiting groove portion 2131, so as to improve the smoothness of the disassembly and assembly of the heating tube 100 and the sealing head 2, and improve the assembly efficiency of the heating tube 100 on the heating tube 100 testing equipment.

[0080] In one embodiment, the sealing seat 21 includes a main seat portion 211, the shape of the main seat portion 211 is consistent with the shape of the mounting groove, and the main seat portion 211 is installed in the mounting groove. A boss portion 212 is protrudingly provided on one side of the main seat portion 211 away from the bottom of the mounting groove, and an upper plug-in structure is provided on the boss portion 212. The outer diameter of the boss portion 212 is smaller than the outer diameter of the main seat portion 211.

[0081] like Figure 2 , Figure 4 and Figure 5 As shown, in order to improve the installation stability of the heating tube 100, in one embodiment, the test device further includes a support seat 6, the support seat 6 is located between the two clamping seats 1 and is relatively fixed to one of the clamping seats 1, and a support groove 61 is provided on one side of the support seat 6 along the first direction, and the groove wall of the support groove 61 is used to cooperate with the tube wall of the heating tube 100. By providing the support seat 6 with the support groove 61, the groove wall of the support groove 61 supports the heating tube 100, reduces the probability of shaking of the heating tube 100 during the detection process, and improves the detection reliability.

[0082] In one embodiment, the cross section of the support groove 61 is V-shaped, so that the groove wall of the support groove 61 has two linear contact positions with the heating tube 100, ensuring the support stability and reliability of the groove wall of the support groove 61 for the heating tube 100, and reducing the processing accuracy requirements for the support groove 61. In other embodiments, the cross-sectional shape of the support groove 61 can be an arc shape that matches the outer diameter of the heating tube 100. The number of support grooves 61 is the same as the number of sealing heads 2, and all support grooves 61 are opened in the same support seat 6, thereby simplifying the structure of the test equipment and reducing the difficulty of processing and assembling the test equipment.

[0083] In one embodiment, the support seat 6 is mounted on the connection portion 41 so that the support seat 6 can be spaced apart from the two clamping seats 1, so that the support seat 6 can be arranged corresponding to the middle of the heating tube 100 while reducing the size of the support seat 6 in the first direction. Further, a positioning groove 411 is provided on the connection portion 41, and the side of the support seat 6 opposite to the support groove 61 is inserted into the positioning groove 411, and the bottom of the support seat 6 and the positioning groove 411 are connected by the connection portion 41 that penetrates the two. In other embodiments, the support seat 6 can also be installed on the fixed clamping seat 1a.

[0084] In order to improve the movement reliability of the movable clamping seat 1b, a sliding guide assembly 3 is provided between the movable clamping seat 1b and the mounting seat 4 to guide the movement of the movable clamping seat 1b along the first direction. In one embodiment, the sliding guide assembly 3 includes a guide rod 31, which extends along the first direction and has two ends respectively mounted on the mounting seat 4 and the fixed clamping seat 1a; the guide rod 31 slides through the movable clamping seat 1b, and at least two guide rods 31 are provided at intervals to prevent the movable clamping seat 1b from deflecting during the movement, thereby improving the movement reliability of the movable clamping seat 1b.

[0085] The sliding guide assembly 3 also includes a sliding guide sleeve 32, which is fixedly inserted in the movable clamping seat 1b and arranged one-to-one with the guide rod 31, and the guide rod 31 is slidably inserted in the sliding guide sleeve 32. The sliding guide sleeve 32 can prevent the guide rod 31 from directly contacting the movable clamping seat 1b, thereby reducing the wear on the movable clamping seat 1b and increasing the service life of the test equipment. The sliding guide sleeve 32 is preferably made of a lubricating and wear-resistant material.

[0086] In one embodiment, the sliding guide assembly 3 further includes a fixed guide sleeve 33, the fixed guide sleeve 33 is inserted into the mounting portion 42, and the guide rod 31 is inserted into the fixed guide sleeve 33. The provision of the fixed guide sleeve 33 can reduce the wear of the mounting portion 42 and the guide rod 31 during the disassembly and assembly of the guide rod 31, and further improve the reliability of the test equipment.

[0087] In one embodiment, the mounting portion 42 and the movable clamping seat 1b are both rectangular plate structures, and four guide rods 31 are provided corresponding to the four corners of the rectangular plate structure, so as to ensure the sliding reliability of the movable clamping seat 1b while preventing the setting of the guide rods 31 from affecting the disassembly and assembly of the heating tube 100 on the test equipment. In other embodiments, the number and position of the guide rods 31 can be set according to requirements.

[0088] In order to prevent the movable clamping seat 1b from moving to collide with the fixed clamping seat 1a, in one embodiment, the testing device further includes a limiting component 7, which is used to limit the maximum travel of the movable clamping seat 1b moving toward the fixed clamping seat 1a.

[0089] In one embodiment, the limiting component 7 includes a limiting block protruding from the movable clamping seat 1b, and the limiting block can abut against a side of the support seat 6 toward the movable clamping seat 1b to limit the movable clamping seat 1b from continuing to move toward the fixed clamping seat 1a. In other embodiments, the limiting component 7 can also adopt other interface settings, such as the limiting component 7 can include a limiting protrusion provided on the movable clamping seat 1b, a limiting slide groove is provided on the connecting portion 41 along the first direction, and the limiting protrusion is slidably inserted in the limiting slide groove.

[0090] Embodiment 2

[0091] This embodiment provides a method for testing a heating tube 100 . The heating tube 100 is tested using the testing equipment provided in the above embodiment. The structure of the testing equipment is not described in detail in this embodiment.

[0092] In this embodiment, the heating tube 100 may be subjected to an anti-dry burning test to determine whether the anti-dry burning performance of the heating tube 100 is qualified. Specifically, the test method includes:

[0093] Step S101, clamping and fixing the heating tube 100 to be tested between two clamping seats 1, so that the inner cavity of the heating tube 100 is sealed and connected with the two medium channels 11;

[0094] Specifically, step S101 includes:

[0095] Step S1011, placing the heating tube 100 into the supporting groove 61 of the supporting seat 6;

[0096] Step S1012, moving the heating tube 100 along the extending direction of the supporting groove 61, so as to seal and plug the first end of the heating tube 100 with the sealing head 2 on the fixed clamping seat 1a;

[0097] Step S1013, the driving assembly 20 drives the movable clamping seat 1b to move in a direction toward the fixed clamping seat 1a, so that the sealing head 2 on the movable clamping seat 1b is sealed and plugged into the heating tube 100;

[0098] Step S102, supplying power to the heating tube 100 so as to heat the heating tube 100 to a preset target temperature;

[0099] Specifically, step S102 includes:

[0100] Step S1021, connecting the connecting wire 102 of the heating tube 100 to the connecting socket 8;

[0101] Step S1022, starting the power supply to the heating tube 100 through the control panel 5, so that the heating tube 100 is heated to a preset target temperature within a set time;

[0102] Exemplarily, the preset target temperature is 395°C.

[0103] Step S103, when the heating tube 100 is kept at the preset target temperature for a certain period of time, the heating tube 100 is powered off and cooled;

[0104] Step S104 , inspecting the heating tube 100 .

[0105] In step S104, the heating tube 100 is inspected, including visual inspection and electrical performance test of the heating tube 100. The visual inspection mainly observes whether the tube body 101 of the heating tube 100 has cracks, whether the film layer has cracks, and other appearance defects; the electrical performance test mainly uses instruments to detect the resistance or current of the heating tube 100, and compares the detection value with the detection value of the same test before the test to determine whether the performance of the heating tube 100 has changed significantly.

[0106] In one embodiment, the detection parameter may include a resistance value, and the resistance value R1 after the test is compared with the resistance value R0 before the test. If |R1-R0| / R0≤A, it indicates that the detection result is qualified. Exemplarily, A is 5%.

[0107] Furthermore, in the anti-dry burning test, the first control valve 9 and the second control valve are kept in a closed state, that is, the medium in the medium test channel is air, and the test equipment is in a second medium flow state.

[0108] In one embodiment, the insulation performance test of the heating tube 100 after the dry-burning test can also be performed to determine the anti-dry-burning performance of the heating tube 100. Specifically, the heating tube 100 is powered on with a current of 0.5 Ma, a frequency of 50 Hz, a voltage of 1000 V, and a test duration of 1 min to determine whether the tube body 101 of the heating tube 100 has flashover breakdown during the test.

[0109] It is worth noting that the test parameters and qualification requirements of the anti-dry burning test of the heating tube 100 can be specifically set according to the product specifications in this field, and this embodiment does not limit or elaborate on them.

[0110] Embodiment 3

[0111] This embodiment provides a method for testing a heating tube 100 , and the heating tube 100 is tested using the testing equipment provided in the above embodiment. This embodiment will not describe the structure of the testing equipment in detail.

[0112] In this embodiment, the testing equipment in the above embodiment can be used to test the sealing performance of the heating tube 100. Specifically, the testing method includes:

[0113] Step S201, clamping and fixing the heating tube 100 to be tested between two clamping seats 1, so that the inner cavity of the heating tube 100 and the two medium channels 11 are sealed and connected;

[0114] For details of step S201, please refer to step S101 in the second embodiment.

[0115] Step S202, closing the first control valve 9;

[0116] Step S203, supplying compressed gas of a preset pressure into the interior of the heating tube 100 through the medium inlet channel 11a to pressurize the inner cavity of the heating tube 100;

[0117] Exemplarily, the preset pressure is 0.6 MPa.

[0118] Step S204: When the inner cavity pressure of the heating tube 100 reaches a preset detection pressure, the pressure is maintained for a preset time;

[0119] Exemplarily, the preset time is 5 minutes.

[0120] Step S205: During the pressure-maintaining process, the pressure detection component detects the pressure value in real time and feeds the pressure value back to the main control board;

[0121] Step S206: Display screen 51 displays the detection result.

[0122] It is understandable that after the pressure detection component feeds back the pressure value to the main control board, the main control board forms a pressure curve in real time based on the pressure detection value and displays it through the display screen 51, so that the user can intuitively view the display result.

[0123] That is, in this embodiment, the first control valve 9 is in a closed state, the second control valve is in an open state, and the test device is in a second medium flow state, wherein the medium is compressed gas.

[0124] It is worth noting that the test parameters and qualification requirements for the sealing of the heating tube 100 can be specifically set according to the product specifications in this field, and this embodiment does not limit or elaborate on them.

[0125] It is understandable that in other embodiments, only the maximum pressure value during pressurization and pressure maintenance during the test and the pressure maintenance pressure value after a preset pressure maintenance time may be detected, and the sealing performance of the heating tube 100 may be judged by the difference or ratio between the maximum pressure value and the pressure maintenance pressure value.

[0126] Embodiment 4

[0127] This embodiment provides a method for testing a heating tube 100 . The heating tube 100 is tested using the testing equipment provided in the above embodiment. The structure of the testing equipment is not described in detail in this embodiment.

[0128] In this embodiment, the testing equipment in the above embodiment can be used to test the condensation shock performance of the heating tube 100. Specifically, the testing method includes:

[0129] Step S301, clamping and fixing the heating tube 100 to be tested between two clamping seats 1, so that the inner cavity of the heating tube 100 and the two medium channels 11 are sealed and connected;

[0130] For details of step S301, please refer to step S101 in the second embodiment.

[0131] Step S302, close the first control valve 9 and the second control valve;

[0132] Step S303, energizing and heating the heating tube 100 so that the heating tube 100 reaches a preset detection temperature;

[0133] Exemplarily, the preset detection temperature is 300°C.

[0134] Step S304, open the first control valve 9 and the second control valve, and introduce a coolant of a preset cooling temperature into the medium inlet channel 11a;

[0135] Exemplarily, the preset cooling temperature is -25°C.

[0136] Step S305, when the duration of the coolant introduction reaches a preset duration, the cold water in the heating tube 100 is discharged;

[0137] Exemplarily, the preset duration is 10 seconds.

[0138] Step S306, repeat steps S202 to S205 for a preset number of times.

[0139] That is, through the above steps, the heating tube 100 is subjected to thermal shock, and the thermal shock of the heating tube 100 is tested. After the test, whether the thermal shock performance of the heating tube 100 is qualified is determined based on whether the tube body 101 of the heating tube 100 is damaged or broken and whether the film layer is cracked or detached. The coolant is preferably cold water, which has a low cost.

[0140] In this embodiment, in step S303, the test device is in a second medium circulation state, and the medium is air at this time; in step S304, the test device is in a second medium circulation state, and the medium is coolant at this time.

[0141] It is worth noting that the test parameters of the condensation shock performance of the heating tube 100 (such as the preset detection temperature, the preset cooling temperature and the preset duration, etc.) and the qualification requirements can be specifically set according to the product specifications in this field, and this embodiment does not limit or elaborate on them.

[0142] Embodiment 5

[0143] This embodiment provides a method for testing a heating tube 100 . The heating tube 100 is tested using the testing equipment provided in the above embodiment. The structure of the testing equipment is not described in detail in this embodiment.

[0144] In this embodiment, the testing equipment in the above embodiment can be used to test the service life of the heating tube 100. Specifically, the testing method includes:

[0145] Step S401, clamping and fixing the heating tube 100 to be tested between two clamping seats 1, so that the inner cavity of the heating tube 100 and the two medium channels 11 are sealed and connected;

[0146] For details of step S401, please refer to step S101 in the second embodiment.

[0147] Step S402, keep the first control valve 9 and the second control valve open;

[0148] Step S403, passing water to the heating tube 100 through the medium inlet channel 11a, and during the water passing process, heating the heating tube 100 at a set power for a preset duration;

[0149] Exemplarily, the preset duration is 1 hour.

[0150] Step S403, after the power-on time is preset, the heating tube 100 is powered off and the heating tube 100 is kept in the power-off state within the preset time interval;

[0151] Exemplarily, the preset interval duration is 30 minutes.

[0152] Step S405: Repeat steps S403 to S404 until the test end condition is met.

[0153] The test end condition may be that the number of repetitions reaches a preset number of repetitions, or the total test duration reaches a preset total duration. For example, the preset total duration is 3000 hours.

[0154] Step S406 , testing the performance of the heating tube 100 .

[0155] Specifically, the power of the heating tube 100 is tested, and if the power attenuation after the test is less than a preset ratio, the performance of the heating tube 100 is judged to be qualified. Exemplarily, the preset ratio is 20%.

[0156] That is, in this embodiment, in step S403, the testing device is in a first medium flow state, and the medium is water.

[0157] It is worth noting that the test parameters of the service life of the heating tube 100 (such as the preset detection temperature, the preset cooling temperature and the preset duration, etc.) and the qualification requirements can be specifically set according to the product specifications in this field, and this embodiment does not limit or elaborate on them.

[0158] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0159] The specific contents of the above specific implementations only express several implementations of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A testing device for a heating tube, applied to a heating tube (100) with openings at both ends, characterized in that: The test equipment includes: Two clamping assemblies are arranged opposite to each other and spaced apart in a first direction, and a medium channel (11) is provided inside each of the two clamping assemblies, one of the medium channels (11) has a medium inlet, and the other of the medium channels (11) has a medium outlet, and the medium outlet can be opened or closed; A driving assembly (20) drives one of the clamping assemblies to move in a direction toward the other clamping assembly, so that the heating tube (100) is clamped between the two clamping assemblies and the inner cavity of the heating tube (100) is sealed and connected to the two medium channels (11) to form a medium test channel; The testing device has a first medium flow state and a second medium flow state. When the testing device is in the first medium flow state, the medium outlet is opened so that the medium can flow through the medium test channel through the medium inlet and then be discharged from the medium outlet; when the testing device is in the second medium flow state, the medium outlet is closed so that the medium can be retained in the medium test channel.

2. The test device according to claim 1, characterized in that The clamping assembly comprises: A clamping seat (1), wherein the clamping seat (1) is provided with the medium channel (11); A sealing head (2) is arranged on a side of the clamping seat (1) facing the other clamping assembly, and a connecting channel (221) is provided on the sealing head (2) along the first direction, and the connecting channel (221) is connected to the medium channel (11). The two sealing heads (2) arranged opposite to each other in the first direction cooperate to clamp the heating tube (100), and the connecting channel (221) is used to communicate with the inner cavity of the heating tube (100).

3. The testing device according to claim 2, characterized in that A plug-in structure is provided on one side of the sealing head (2) facing the other clamping assembly, the plug-in structure comprising a plug-in ring groove (213), the plug-in ring groove (213) being used for inserting the end of the heating tube (100), and the connecting channel (221) is located on the inner side of the plug-in ring groove (213).

4. The testing device according to claim 3, characterized in that The plug-in ring groove (213) comprises a coaxially connected limiting groove portion (2131) and a guiding groove portion (2132); the guiding groove portion (2132) is located on the side of the limiting groove portion (2131) facing the other sealing head (2); and the groove width of the guiding groove portion (2132) gradually increases in a direction away from the limiting groove portion (2131).

5. The testing device according to claim 2, characterized in that The sealing head (2) comprises a sealing seat (21) and a fastener (22); the sealing seat (21) is mounted on the clamping seat (1); the fastener (22) passes through the sealing seat (21) and is connected to the inner wall of the medium channel (11); the fastener (22) is provided with the connecting channel (221); and the sealing seat (21) is used to clamp the heating tube (100).

6. The testing device according to claim 2, characterized in that: The clamping seat (1) is provided with a mounting groove on one side facing the other clamping assembly, the mounting groove is arranged in one-to-one correspondence with the sealing head (2), the medium channel (11) is connected with the mounting groove, and the sealing head (2) is sealed and installed in the mounting groove; And / or, the sealing head (2) protrudes out of the clamping seat (1) toward one side of the other clamping component.

7. The testing device according to any one of claims 2 to 6, characterized in that: Each of the clamping seats (1) is provided with a plurality of sealing heads (2) at intervals along a second direction, the sealing heads (2) of the two clamping assemblies are arranged in a one-to-one correspondence, and the second direction is perpendicular to the first direction; The medium channel (11) comprises a main channel (111) and a plurality of branch channels (112); the plurality of branch channels (112) are arranged in one-to-one correspondence with the plurality of sealing heads (2); and each of the branch channels (112) is connected to the main channel (111) and the connecting channel (221) of the corresponding sealing head (2); one end of the main channel (111) is open to the corresponding medium inlet or medium outlet.

8. The testing device according to any one of claims 1 to 6, characterized in that: The testing device further comprises a support seat (6), wherein the support seat (6) is located between the two clamping assemblies and is fixed relative to one of the clamping assemblies, and a support groove (61) is formed through one side of the support seat (6) along the first direction, and the groove wall of the support groove (61) is used to cooperate with the tube wall of the heating tube (100).

9. The testing device according to any one of claims 1 to 6, characterized in that: One of the two medium channels (11) is a medium inlet channel (11a), and the other is a medium outlet channel (11b); one end port of the medium inlet channel (11a) forms the medium inlet, and one end port of the medium outlet channel (11b) forms the medium outlet; the test device comprises a main control board; The test device further comprises a first control valve (9), the first control valve (9) being installed at the medium outflow channel (11b) and being used for controlling the on and off of the medium outlet, the first control valve (9) being communicatively connected to the main control board; and / or, the test device further comprises a detection component (10) and a main control board, the detection component (10) being arranged at the medium inlet channel (11a) and being communicatively connected to the main control board, the detection component (10) comprising a temperature detection component (10) and / or a pressure detection component (10).

10. The testing device according to claim 9, characterized in that The testing device further includes a second control valve, which is installed at the medium inlet channel and is used to control the on-off of the medium inlet, and the second control valve is communicatively connected to the main control board.

11. The testing device according to any one of claims 2 to 6, characterized in that: One of the clamping seats (1) is a fixed clamping seat (1a), and the other clamping seat (1) is a movable clamping seat (1b); the fixed clamping seat (1a) (1) is connected to a mounting seat (4), and the driving assembly (20) is mounted on the mounting seat (4); The testing device further comprises a control panel (5), wherein the control panel (5) is mounted on the mounting base (4), the driving assembly (20) is electrically connected to the control panel (5), and the control panel (5) can control the on and off of the heating tube (100).

12. The testing device according to claim 11, characterized in that A wiring seat (8) is provided on one of the clamping seats (1), the wiring seat (8) is electrically connected to the control panel (5), and the wiring seat (8) is used to be electrically connected to the wiring line of the heating tube (100).

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