High-temperature tensile test device for screw

Abstract

The utility model discloses a high-temperature tensile test device for a screw. The high-temperature tensile test device comprises an upper-end main body part and a lower-end main body part, the upper end main body part is positioned right above the lower end main body part; the opposite sides of the upper end main body part and the lower end main body part are connected through a test screw and a nut; the top of the upper end main body part and the bottom of the lower end main body part are respectively connected with an upper end chuck and a lower end chuck of an external testing machine; and the upper end main body part and the lower end main body part are respectively communicated with an external cooling water pump through water pipes. The high-temperature tensile test device for the screw, disclosed by the utility model, is scientific in structural design, can solve the problems in a high-temperature tensile test of the screw in the prior art, solves the problems of difficulty in material selection of a clamp and high manufacturing cost of the screw tensile test in a high-temperature environment, and ensures that the screw tensile test is reliably carried out in the high-temperature environment; the method has great practical significance.

Description

Technical Field

[0001] The utility model relates to the technical field of strength testing of screws, in particular to a high-temperature tensile testing device for screws, specifically a testing device for testing the tensile strength of screws at high temperatures. Background Art

[0002] For aircraft, such as airplanes, their rear structures are subjected to relatively high temperatures during actual flight. The screws used for fastening are one of the important components to ensure structural stability. Therefore, it is particularly important to estimate the material selection and strength of the screws in the early stages of structural design.

[0003] Since screws are made of unconventional plate or bar structures, existing testing machines (specifically tensile testing machines) are often unable to clamp them directly when testing their strength. Corresponding test fixtures need to be designed for use in conjunction with these machines. When conducting tensile tests on screws in high-temperature environments, test fixtures are usually made of high-temperature alloys. These alloys are expensive and easily deformed when heated, reducing the accuracy of the loading direction.

[0004] It should be noted that regarding the high-temperature tensile test on screws, the high-temperature environment in which the screws are located is specifically a high-temperature environment of 35°C to 1350°C. It should be noted that the high-temperature tensile test is carried out at a temperature above 35°C, which is higher than the room temperature of 35°C specified in GB / T228.1-2010 "Tensile Test of Metallic Materials Part 1: Room Temperature Test Method".

[0005] Therefore, in order to achieve the high-temperature tensile test requirements of screws, existing conventional test fixtures cannot avoid the above-mentioned problems, cannot get rid of the limitations of ambient temperature, and cannot reduce testing costs.

[0006] Therefore, there is an urgent need to develop a technology that can solve the above technical problems. Utility Model Content

[0007] The purpose of the utility model is to provide a high-temperature tensile testing device for screws in view of the technical defects in the prior art.

[0008] To this end, the utility model provides a high-temperature tensile test device for screws, which is characterized by comprising an upper main body portion and a lower main body portion;

[0009] an upper main body portion, located directly above the lower main body portion;

[0010] The upper main body portion and the lower main body portion are connected on opposite sides by a test screw and a nut;

[0011] The top of the upper main body portion and the bottom of the lower main body portion are connected to the upper clamp and the lower clamp of the external testing machine respectively;

[0012] The upper main body part and the lower main body part are respectively connected to the external cooling water pump through water pipes;

[0013] The upper main body portion and the lower main body portion are provided with a screw tail fixing seat and a screw head fixing seat on opposite sides thereof respectively;

[0014] The screw rod of the test screw vertically passes through the screw tail fixing seat and the screw head fixing seat, and is threadedly fixedly connected with the nut.

[0015] It can be seen from the technical solution provided by the above utility model that, compared with the existing technology, the utility model provides a high-temperature tensile testing device for screws. Its structural design is scientific, which can solve the difficulties of the existing technology in high-temperature tensile testing of screws, and overcome the difficulties in selecting fixture materials and high manufacturing costs for screw tensile testing in high-temperature environments. It ensures the reliable implementation of screw tensile testing in high-temperature environments by introducing cooling water into the upper and lower main body parts used to connect the test screws, which has great practical significance.

[0016] The device of the present invention is a low-cost high-temperature tensile testing device for screws that can be used for a long time and is suitable for screws of various specifications. It realizes the versatility of screws of various specifications and the reusability of the testing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a working state of a high-temperature tensile testing device for screws provided by the utility model;

[0018] Figure 2 This is a schematic diagram of the exploded three-dimensional structure of a high-temperature tensile testing device for screws provided by the utility model;

[0019] Figure 3 This is a schematic diagram of the assembly of the upper main body of a high-temperature tensile test device for screws provided by the utility model. Figure 1 ;

[0020] Figure 4 This is a schematic diagram of the assembly of the upper main body of a high-temperature tensile test device for screws provided by the utility model. Figure 2 ;

[0021] Figure 5 This is a schematic diagram of the assembly of the lower end main body of a high temperature tensile test device for screws provided by the utility model. Figure 1 ;

[0022] Figure 6This is a schematic diagram of the assembly of the lower end main body of a high temperature tensile test device for screws provided by the utility model. Figure 2 ;

[0023] In the figure, the upper clamping block is 1; the upper water inlet and outlet adapter plate is 2; the screw tail fixing seat is 3, the screw head fixing seat is 4, and the lower water support column is 5;

[0024] The lower end clamping block is 6, the lower end water inlet and outlet adapter plate is 7, the heating furnace cavity is 8, the test screw is 9, and the upper end water support column is 10;

[0025] The screw tail support block is 11; the screw head support block is 12;

[0026] The tail fixing seat channel is 301; the screw tail support block installation through hole is 302;

[0027] The upper water inlet and outlet channel is 201; the head fixing seat channel is 401; the screw head support block mounting hole is 402; the lower water channel is 501; the lower water inlet and outlet channel is 701; the upper water channel is 1001;

[0028] The first cavity is 81; the second cavity is 82; and the nut is 90. DETAILED DESCRIPTION

[0029] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 invention.

[0031] In the description of this patent, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood broadly. For example, they can refer to fixed connection or set, detachable connection or set, or integral connection or set. Those skilled in the art will understand the specific meanings of the above terms in this patent based on specific circumstances.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0033] See also Figures 1 to 6 , the utility model provides a high temperature tensile test device for screws, comprising an upper main body part and a lower main body part;

[0034] an upper main body portion, located directly above the lower main body portion;

[0035] The upper main body portion and the lower main body portion are connected on opposite sides by a test screw 9 and a nut 90;

[0036] The top of the upper main body portion and the bottom of the lower main body portion are respectively connected to the upper clamp and the lower clamp of the external testing machine (specifically, clamped connection).

[0037] In the present invention, in a specific implementation, the high-temperature tensile test device for screws further includes: a heating furnace cavity 8;

[0038] A vertically penetrating heating cavity is provided on the heating furnace cavity 8;

[0039] The heating chamber is provided with an upper main body portion and a lower main body portion;

[0040] In specific implementation, the heating furnace cavity 8 includes a first cavity 81 and a second cavity 82;

[0041] The first cavity 81 and the second cavity 82 have opposite sides, each having a semi-cylindrical sub-cavity;

[0042] When the first cavity 81 and the second cavity 82 are combined together, the sub-cavities of the two together form a cylindrical heating cavity.

[0043] In a specific implementation, the rear sides of the first cavity 81 and the second cavity 82 are hinged (for example, hinged by a hinge);

[0044] It should be noted that the heating furnace cavity 8 can be a heating device with mature existing technology, which has been widely used and has the function of inner cavity heating. For example, it can be a heating device with model SYJ-3-14 produced by Xinite Technology Co., Ltd., which is used to heat the screws placed in its inner cavity and can provide a high temperature environment for the screws (specifically a high temperature environment of 35°C to 1350°C).

[0045] It should be noted that, in the present utility model, regarding the high-temperature tensile test on screws, the high-temperature environment where the screws are located is specifically a high-temperature environment of 35°C to 1350°C. It should be noted that the high-temperature tensile test is carried out at a temperature above 35°C, which is higher than the room temperature temperature of 35°C specified in GB / T 228.1-2010 "Tensile Test of Metallic Materials Part 1: Room Temperature Test Method".

[0046] In the present invention, in a specific implementation, the upper main body part and the lower main body part are respectively connected to an external cooling water pump through water pipes;

[0047] A cooling water pump is used to supply cooling water to the upper main body part and the lower main body part for connecting the test screws.

[0048] In the present invention, in a specific implementation, the upper main body portion and the lower main body portion have opposite sides respectively provided with a screw tail fixing seat 3 and a screw head fixing seat 4;

[0049] The screw rod of the test screw 9 vertically passes through the screw tail fixing seat 3 and the screw head fixing seat 4, and is threadedly fixedly connected with the nut 90.

[0050] In the present utility model, in a specific implementation, the upper main body part includes: an upper clamping block 1, an upper water inlet and outlet adapter plate 2, a screw tail fixing seat 3, an upper water support column 10 and a screw tail support block 11;

[0051] A cylindrical upper clamping block 1 is vertically arranged at the top center of the upper water inlet and outlet adapter plate 2;

[0052] The upper water inlet and outlet adapter plate 2 and the screw tail fixing seat 3 are arranged parallel to each other;

[0053] The upper water inlet and outlet adapter plate 2 is located directly above the screw tail fixing seat 3;

[0054] The upper water inlet and outlet adapter plate 2 and the screw tail fixing seat 3 are connected on the opposite side through four upper water support columns 10;

[0055] A screw tail support block mounting through hole 302 is provided at the center of the screw tail fixing seat 3;

[0056] A screw tail support block 11 is provided in the screw tail support block mounting through hole 302 (specifically, the screw tail support block 11 is embedded in the screw tail support block mounting through hole 302);

[0057] The central through hole of the screw tail support block 11 is used to vertically pass the screw rod of the test screw 9;

[0058] The upper portion of the screw rod is threadedly connected to the nut 90 after passing through the central through hole of the screw tail support block 11 .

[0059] In a specific implementation, the upper clamping block 1 is connected to the upper clamp of the external testing machine (specifically, a clamping connection);

[0060] It should be noted that, in this utility model, see Figure 3 and Figure 4 The screw tail fixing seat 3 and the screw tail support block 11 are inner and outer stepped structures respectively. During installation, the screw tail support block 11 can be directly embedded into the screw tail fixing seat 3. The screw tail fixing seat 3 can prevent the screw tail support block 11 from falling off in the loading direction of the tensile test (i.e. vertically).

[0061] In specific implementation, the screw tail support block 11 is replaceable and can be replaced with reference to screws of different specifications (i.e., test screws 9). For test screws of different specifications, the corresponding screw tail support block 11 can be replaced (the purpose is: to make the shape and size of the center through hole of the screw tail support block 11 correspond to the shape and size of the screw rod of the test screw 9, and the corresponding screw tail support block 1 is the screw head support block 12 whose shape and size of the center through hole correspond to the shape and size of the screw rod of the test screw 9). The rest of the test device does not need to be reprocessed, which ensures the versatility of screws of various specifications and the reusability of the test device.

[0062] In specific implementation, the center position of each upper water-through support column 10 has a vertically distributed, hollow upper water-through channel 1001;

[0063] Inside the upper water inlet and outlet adapter plate 2, a curved upper water inlet and outlet channel 201 is provided at a position corresponding to the top opening of each upper water channel 1001;

[0064] One end opening of each upper water inlet and outlet channel 201 is connected to the top opening of an upper water channel 1001;

[0065] The other end of each upper water inlet and outlet channel 201 is open and located on the outer side of the upper water inlet and outlet adapter plate 2;

[0066] Inside the screw tail fixing seat 3, at a position corresponding to the bottom opening of the two upper end water passages 1001 located on the same side (for example, both on the left side or both on the right side), a tail fixing seat channel 301 with both ends bent upward is provided;

[0067] The two end openings of the tail fixing seat channel 301 are connected to the bottom openings of the two upper end water passages 1001 located on the same side (for example, both on the left side or both on the right side);

[0068] Furthermore, the overall shape of the upper water inlet and outlet channel 201 is L-shaped;

[0069] The overall shape of the tail fixing seat channel 301 is U-shaped;

[0070] In a specific implementation, the screw tail support block mounting through hole 302 is a stepped through hole, which includes a first upper hole section and a first lower hole section distributed up and down;

[0071] The first upper hole section and the first lower hole section are both cylindrical in shape;

[0072] The first upper hole section and the first lower hole section are located on the same central axis;

[0073] The aperture of the first upper hole section is larger than the aperture of the first lower hole section;

[0074] In a specific implementation, the shape and size of the screw tail support block mounting through hole 302 correspond to the shape and size of the screw tail support block 11 .

[0075] It should be noted that, see Figure 1 and Figure 2 The upper clamping block 1 is clamped by the upper clamp of the external testing machine. The upper clamping block 1 and the upper water inlet and outlet adapter plate 2 can be processed separately and then welded. The upper water inlet and outlet adapter plate 2 is welded to the screw tail fixing seat 3 through four upper water support columns 10. The water hole (i.e., water channel) needs to be prefabricated in advance before welding. Attention should be paid to the verticality of processing and welding to ensure the accuracy of the loading direction.

[0076] In the present utility model, the upper and lower main body parts are specifically implemented, including: a lower clamping block 6, a lower water inlet and outlet adapter plate 7, a screw head fixing seat 4, a lower water support column 5 and a screw head support block 12;

[0077] A cylindrical lower end clamping block 6 is vertically provided at the bottom center of the lower end water inlet and outlet adapter plate 7;

[0078] The screw head fixing seat 4 and the lower end water inlet and outlet adapter plate 7 are arranged parallel to each other;

[0079] The screw head fixing seat 4 is located directly above the water inlet and outlet adapter plate 7 at the lower end;

[0080] The screw head fixing seat 4 and the side opposite to the lower water inlet and outlet adapter plate 7 are connected by four lower water support columns 5;

[0081] A screw head support block mounting through hole 402 is provided at the center of the screw head fixing seat 4;

[0082] A screw head support block 12 is provided in the screw head support block mounting through hole 402 (specifically, the screw head support block 12 is embedded in the screw head support block mounting through hole 402);

[0083] The central through hole of the screw head support block 12 is used to vertically penetrate the screw rod of the test screw 9;

[0084] The lower portion of the screw rod passes through the central through hole of the screw tail support block 11 , and a nut is provided at the bottom end of the screw rod.

[0085] Specifically, the lower end clamping block 6 is connected to the lower end clamp of the external testing machine (specifically, a clamping connection);

[0086] It should be noted that, in this utility model, see Figure 5 and Figure 6 The screw head fixing seat 4 and the screw head support block 12 are inner and outer stepped structures respectively. During installation, the screw head support block 12 can be directly embedded in the screw head fixing seat 4. The screw head fixing seat 4 can prevent the screw head support block 12 from falling off in the loading direction of the tensile test (i.e. vertically).

[0087] In specific implementation, the screw head support block 12 is replaceable and can be replaced with reference to screws of different specifications (i.e., test screws 9). For test screws of different specifications, the corresponding screw head support block 12 can be replaced (the purpose is: to make the shape and size of the center through hole of the screw head support block 12 correspond to the shape and size of the screw rod of the test screw 9, and the corresponding screw head support block 12 is the screw head support block 12 whose shape and size of the center through hole correspond to the shape and size of the screw rod of the test screw 9). The rest of the test device does not need to be reprocessed, which ensures the versatility of screws of various specifications and the reusability of the test device.

[0088] In specific implementation, the center position of each lower end water-through support column 5 has a vertically distributed, hollow lower end water-through channel 501;

[0089] Inside the lower water inlet and outlet adapter plate 7, a curved lower water inlet and outlet channel 701 is provided at a position corresponding to the bottom opening of each lower water channel 501;

[0090] One end of the lower water inlet and outlet channel 701 is open and communicates with the bottom opening of the lower water channel 501;

[0091] The other end of the lower water inlet and outlet channel 701 is open and is located on the outer surface of the lower water inlet and outlet adapter plate 7;

[0092] Inside the screw head fixing seat 4, at a position corresponding to the top openings of the two lower end water passages 501 located on the same side (for example, both left or both right), a head fixing seat channel 401 with both ends bent downward is provided;

[0093] The two end openings of the head fixing seat channel 401 are connected to the top openings of the two lower end water passages 501 located on the same side (for example, both on the left side or both on the right side);

[0094] Furthermore, the overall shape of the lower end water inlet and outlet channel 701 is L-shaped;

[0095] The overall shape of the head fixing seat channel 401 is U-shaped;

[0096] In a specific implementation, the screw head support block mounting through hole 402 is a stepped through hole, which includes a second upper hole section and a second lower hole section distributed vertically;

[0097] The second upper hole section and the second lower hole section are both cylindrical in shape;

[0098] The second upper hole section and the second lower hole section are located on the same central axis;

[0099] The aperture of the second upper hole section is smaller than the aperture of the second lower hole section;

[0100] In a specific implementation, the shape and size of the screw head support block mounting through hole 402 correspond to the shape and size of the screw head support block 12 .

[0101] It should be noted that, see Figure 1 and Figure 2 The lower end clamping block 6 is clamped by the lower end clamping head of the external testing machine. The lower end clamping block 6 and the lower end water inlet and outlet adapter plate 7 can be processed separately and then welded. The upper end water inlet and outlet adapter plate 7 is welded to the screw head fixing seat 4 through four lower end water support columns 5. The water hole (i.e., water channel) needs to be prefabricated in advance before welding. Attention should be paid to the verticality of processing and welding to ensure the accuracy of the loading direction.

[0102] It should be noted that, see Figure 1 and Figure 2 The upper main body part and the lower main body part are only the perspectives in the accompanying drawings. In actual application, the upper and lower main body parts can be swapped.

[0103] It should be noted that the external testing machine is a mature and widely used testing equipment with existing technology. For example, it can be a universal testing machine with model DDL-200 produced by China Machinery Testing Equipment Co., Ltd., which is used to apply tensile load to screws.

[0104] In this utility model, the specific implementation is as follows Figure 1 and Figure 2 The height of the upper water support column 10 and the lower water support column 5 can be designed and processed according to the size of the heating furnace cavity 8, and can be adapted to heating furnaces of different sizes. On the premise of ensuring the verticality of welding and the accuracy of installation direction, the height of the upper water support column 10 and the lower water support column 5 has no effect on the test.

[0105] It should be noted that, see Figure 3 and Figure 6 , four water inlets and outlets (i.e., upper water inlet and outlet channels 201) are provided on the upper water inlet and outlet adapter plate 2, two of which are water inlets and the other two are water outlets; it should be noted that, for any one tail fixing seat channel 301, the two upper water inlet and outlet channels 201 connected by the two upper water passages 1001, one of the upper water inlet and outlet channels 201 serves as a water inlet, and the other upper water inlet and outlet channel 201 serves as a water outlet;

[0106] Four water inlets and outlets (i.e., lower water inlet and outlet channels 701) are provided on the lower water inlet and outlet adapter plate 7, two of which are water inlets and the other two are water outlets. It should be noted that, for the head fixing seat channel 401, the two lower water inlet and outlet channels 701 are connected through the two lower water passages 501, one of which is used as a water inlet and the other as a water outlet.

[0107] The above-mentioned water inlet and outlet should be threaded and connected to the external water pipe through a quick-connect connector. It is recommended that the water inlet and outlet be set diagonally to ensure smooth water flow.

[0108] In a specific implementation, the water inlet and the water outlet are respectively connected to the liquid outlet and liquid inlet of an external cooling pump (such as a water pump for cooling) through a hollow external water pipe, and the water pipe is pre-injected with a coolant (such as pure water). It should be noted that the coolant is water. Among them, the function of the external cooling pump (such as a water pump) is to provide circulation power to the coolant in the water pipe, thereby ensuring that the coolant can flow in the water pipe and the water-passing structure inside the upper main body part and the lower main body part (specifically, it can include the upper water inlet and outlet channel 201, the tail fixed seat channel 301, the upper water-passing channel 1001, the lower water inlet and outlet channel 701, the lower water-passing channel 501 and the head fixed seat channel 401, etc.), and the flow rate of the coolant can be controlled.

[0109] In the utility model, in terms of specific implementation, the upper clamping block, the upper water inlet and outlet adapter plate, the upper water support column, the screw tail fixing seat, the lower clamping block, the lower water inlet and outlet adapter plate, the lower water support column, and the screw head fixing seat are processed separately; the various components of the upper main body part and the various components of the lower main body part are then connected separately by welding, saving processing raw materials.

[0110] In the utility model, in terms of specific implementation, the upper clamping block, the upper water inlet and outlet adapter plate, the upper water support column, the screw tail fixing seat, the lower clamping block, the lower water inlet and outlet adapter plate, the lower water support column, and the screw head fixing seat are all provided with corresponding water-through structures for cooling the test device (i.e., the test fixture), thereby getting rid of the limitation of ambient temperature on the fixture material.

[0111] In the present invention, in terms of specific implementation, all components in the test device are processed using room temperature materials, which can meet the test requirements of high temperature environments and greatly reduce the cost of the test.

[0112] In order to more clearly understand the technical solution of the present invention, the working principle of the present invention is described below.

[0113] First, the upper main body of the test device is processed and connected. The upper clamping block 1, the upper water inlet and outlet adapter plate 2, the screw tail fixing seat 3 and the upper water support column 10 are processed and prefabricated with the corresponding water flow structure before welding.

[0114] Among them, for the four water inlets and outlets on the upper water inlet and outlet adapter plate 2 (i.e., the upper water inlet and outlet channels 201), two of them are water inlets and two are water outlets, all of which should be threaded and connected to the water pipes through quick-connect connectors. Pre-flow water according to the water pressure in the actual application process, test whether there are leaks at each welding point, and observe whether the water flow rate of the two water outlets is uniform and normal;

[0115] Then, the lower end main body of the test device is processed and connected, and the lower end clamping block 6, the lower end water inlet and outlet adapter plate 7, the screw head fixing seat 4 and the lower end water support column 5 are respectively processed and prefabricated with water holes and then welded. For the four water inlets and outlets on the lower end water inlet and outlet adapter plate 7 (i.e., the lower end water inlet and outlet channels 701), two of them are water inlets and two are water outlets, all of which should be threaded and connected to the water pipe through quick-plug connectors. Pre-water should be passed according to the water pressure in the actual application process to test whether there are leaks at each welding point and observe whether the water flow rate of the two water outlets is uniform and normal.

[0116] Then, according to the size of the test screw 9 (specifically the size of the screw), a corresponding matching screw tail support block 11 (the purpose is to make the shape and size of the central through hole of the screw tail support block 11 correspond to the shape and size of the screw rod of the test screw 9) and a screw head support block 12 (the purpose is to make the shape and size of the central through hole of the screw head support block 12 correspond to the shape and size of the screw rod of the test screw 9), and the two are respectively embedded in the screw tail fixing seat 3 and the screw head fixing seat 4;

[0117] Then, the test screw 9 and the matching nut 90 are separated, and the test screw 9 is inserted from bottom to top into the screw head support block 12, and the extended part continues to be inserted upward into the screw tail support block 11 and is tightened with the matching nut 90. According to the test requirements, a torque wrench is used to apply torque to the test screw 9 and the matching nut 90. At this time, the upper end main body part and the lower end main body part of the test device have formed a whole through the test screw 9 and the matching nut 90;

[0118] Then, connect the upper clamping block 1 to the upper chuck of the external testing machine, connect the lower clamping block 6 to the lower chuck of the external testing machine, adjust the crossbeam of the testing machine to a suitable position, and apply pre-tightening force to the test screw 9 and the matching nut 90. Then, a formal test (i.e., a tensile test) can be carried out, applying tension upward and downward from the upper and lower sides respectively.

[0119] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A high temperature tensile test device for screws, characterized in that: including an upper main body portion and a lower main body portion; an upper main body portion, located directly above the lower main body portion; The upper main body portion and the lower main body portion are connected on opposite sides by a test screw (9) and a nut (90); The top of the upper main body portion and the bottom of the lower main body portion are connected to the upper clamp and the lower clamp of the external testing machine respectively; The upper main body part and the lower main body part are respectively connected to the external cooling water pump through water pipes; The upper main body portion and the lower main body portion are provided on opposite sides thereof with a screw tail fixing seat (3) and a screw head fixing seat (4); The screw rod of the test screw (9) vertically penetrates through the screw tail fixing seat (3) and the screw head fixing seat (4) and is then threadedly fixedly connected with the nut (90).

2. The high temperature tensile testing device for screws according to claim 1, characterized in that: Also includes: Heating furnace cavity (8); A vertically penetrating heating cavity is provided on the heating furnace cavity (8); The heating chamber is provided with an upper main body portion and a lower main body portion.

3. The high temperature tensile testing device for screws according to claim 1, characterized in that: A heating furnace cavity (8) includes a first cavity (81) and a second cavity (82); The first cavity (81) and the second cavity (82) have semi-cylindrical sub-cavities on opposite sides thereof; When the first cavity (81) and the second cavity (82) are combined, the sub-cavities of the two together form a cylindrical heating cavity; The rear sides of the first cavity (81) and the second cavity (82) are hinged.

4. The high temperature tensile testing device for screws according to any one of claims 1 to 3, characterized in that: The upper main body portion comprises: an upper clamping block (1), an upper water inlet and outlet adapter plate (2), a screw tail fixing seat (3), an upper water support column (10) and a screw tail support block (11); A cylindrical upper clamping block (1) is vertically arranged at the top center of the upper water inlet and outlet adapter plate (2); The upper water inlet and outlet adapter plate (2) and the screw tail fixing seat (3) are arranged parallel to each other; The upper water inlet and outlet adapter plate (2) is located directly above the screw tail fixing seat (3); The upper water inlet and outlet adapter plate (2) and the side opposite to the screw tail fixing seat (3) are connected via four upper water-through support columns (10); A screw tail support block mounting through hole (302) is provided at the center of the screw tail fixing seat (3); A screw tail support block (11) is provided in the screw tail support block mounting through hole (302); The central through hole of the screw tail support block (11) is used to vertically penetrate the screw rod of the test screw (9); The upper portion of the screw is threadedly connected to the nut (90) after passing through the central through hole of the screw tail support block (11); The upper end clamping block (1) is clamped and connected with the upper end clamp of the external testing machine.

5. The high temperature tensile testing device for screws according to claim 4, characterized in that: The center position of each upper water-through support column (10) is provided with a vertically distributed, hollow upper water-through channel (1001); Inside the upper water inlet and outlet adapter plate (2), a curved upper water inlet and outlet channel (201) is provided at a position corresponding to the top opening of each upper water passage (1001); One end opening of each upper water inlet and outlet channel (201) is connected to the top opening of an upper water passage (1001); The other end of each upper water inlet and outlet channel (201) is open and located on the outer side of the upper water inlet and outlet adapter plate (2); A tail fixing seat channel (301) with both ends bent upward is provided in the screw tail fixing seat (3) at a position corresponding to the bottom openings of the two upper water passages (1001) located on the same side; The two end openings of the tail fixing seat channel (301) are connected to the bottom openings of the two upper end water passages (1001) located on the same side.

6. The high temperature tensile testing device for screws according to claim 5, characterized in that: The overall shape of the upper water inlet and outlet channel (201) is L-shaped; and / or, The overall shape of the tail fixing seat channel (301) is U-shaped.

7. The high temperature tensile testing device for screws according to claim 5, characterized in that: The screw tail support block mounting through hole (302) is a stepped through hole, which includes a first upper hole section and a first lower hole section distributed up and down; The first upper hole section and the first lower hole section are both cylindrical in shape; The first upper hole section and the first lower hole section are located on the same central axis; The aperture of the first upper hole section is larger than the aperture of the first lower hole section; and / or, For any tail fixing seat channel (301), the two upper water inlet and outlet channels (201) are connected through the two upper water passages (1001), one of the upper water inlet and outlet channels (201) serves as a water inlet, and the other upper water inlet and outlet channel (201) serves as a water outlet.

8. The high temperature tensile testing device for screws according to any one of claims 1 to 7, characterized in that: The lower end main body part comprises: a lower end clamping block (6), a lower end water inlet and outlet adapter plate (7), a screw head fixing seat (4), a lower end water support column (5) and a screw head support block (12); A cylindrical lower end clamping block (6) is vertically arranged at the bottom center of the lower end water inlet and outlet adapter plate (7); The screw head fixing seat (4) and the lower end water inlet and outlet adapter plate (7) are arranged parallel to each other; The screw head fixing seat (4) is located directly above the lower water inlet and outlet adapter plate (7); The screw head fixing seat (4) and the opposite side of the lower water inlet and outlet adapter plate (7) are connected through four lower water support columns (5); A screw head support block mounting through hole (402) is provided at the center of the screw head fixing seat (4); A screw head support block (12) is provided in the screw head support block mounting through hole (402); The central through hole of the screw head support block (12) is used to vertically penetrate the screw rod of the test screw (9); The lower part of the screw rod passes through the central through hole of the screw tail support block (11), and a nut is provided at the bottom end of the screw rod; The lower end clamping block (6) is clamped and connected with the lower end clamp of the external testing machine.

9. The high temperature tensile testing device for screws according to claim 8, characterized in that: The center position of each lower end water-through support column (5) is provided with a vertically distributed, hollow lower end water-through channel (501); A curved lower water inlet and outlet channel (701) is provided in the lower water inlet and outlet adapter plate (7) at a position corresponding to the bottom opening of each lower water channel (501); One end of the lower water inlet and outlet channel (701) is open and communicates with the bottom opening of the lower water channel (501); The other end of the lower water inlet and outlet channel (701) is open and is located on the outer side of the lower water inlet and outlet adapter plate (7); A head fixing seat channel (401) with both ends bent downward is provided in the screw head fixing seat (4) at a position corresponding to the top openings of the two lower end water passages (501) located on the same side; The two end openings of the head fixing seat channel (401) are connected to the top openings of the two lower end water passages (501) located on the same side.

10. The high temperature tensile testing device for screws according to claim 9, characterized in that: The overall shape of the water inlet and outlet channel (701) at the lower end is L-shaped; and / or, The overall shape of the head fixing seat channel (401) is U-shaped; and / or, The screw head support block mounting through hole (402) is a stepped through hole, which includes a second upper hole section and a second lower hole section distributed up and down; The second upper hole section and the second lower hole section are both cylindrical in shape; The second upper hole section and the second lower hole section are located on the same central axis; The aperture of the second upper hole section is smaller than the aperture of the second lower hole section; and / or, The head fixing seat channel (401) has two lower end water inlet and outlet channels (701) connected to each other through two lower end water passages (501), one of the lower end water inlet and outlet channels (701) serves as a water inlet, and the other lower end water inlet and outlet channel (701) serves as a water outlet.

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