Tension test joint
By designing a tensile test joint including a joint body, an extrusion block and a locking screw, the problem of inconvenience between the tensile sensor and the measured body with a diameter is solved, and effective tensile testing of the measured body is achieved, improving the efficiency and accuracy of the test.
Patent Information
- Application Number
- CN202421795265.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-07-29
AI Technical Summary
The prior art is difficult to directly connect the tension sensor to the measured body with a caliber, especially when testing is required with the help of intermediate media, resulting in inconvenient connection.
A tensile test joint is designed, including the joint body, the extrusion block and the locking screw. By screwing in and pushing the locking screw threads, the extrusion block gradually expands outward and is tightened on the inner wall of the body to be tested, so as to achieve connection with the tension sensor.
The tensile force test of the measured body with a caliber is realized, which improves the speed, stability and safety of the test, ensures the accuracy of the test data, and the modular design makes the connection and disassembly more convenient.
Smart Images
Figure CN222782869U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a tool for tension testing, in particular to a tension testing joint connected between a tension sensor and a tested body. Background Art
[0002] Sometimes, the tension sensor and the object being tested cannot be directly connected for testing. For example, the object being tested cannot be connected to the tension sensor, and an intermediate medium is required. For example, in the strength test of the gas filling port of a gas vehicle cylinder, a tension test is required on the gas filling port of the gas cylinder to determine whether the device load meets the regulations. This requires that the gas filling port of the gas cylinder be firmly connected to one end of the tension sensor during the test. For this purpose, a certain design of the connection fixture is required to ensure that the test can be carried out conveniently and quickly. Utility Model Content
[0003] In view of the needs of the prior art, the utility model provides a tension test connector, which is used to solve the problem of inconvenient connection between a tension sensor and a measured object.
[0004] The technical solution of the utility model is as follows: a tensile test joint, comprising a joint body, an extrusion block, and a locking screw;
[0005] The joint body is a rod, one end of which is connected to the tension sensor. A through hole is provided inside the joint body. An end of the through hole close to the tension sensor is provided with an internal thread, and the other end is a light hole. A push block hole is provided on the rod wall at the light hole, and an extrusion block is movably installed in the push block hole.
[0006] The locking screw is inserted into the through hole, one end of which is threadedly connected to the through hole, and the other end of which is provided with a conical head. When the conical head passes through the light hole, it can squeeze the extrusion block.
[0007] Furthermore: a hexagonal nut is provided at one end of the joint body connected to the tension sensor.
[0008] Furthermore: the extrusion blocks are evenly distributed along the circumferential direction on the rod wall of the joint body.
[0009] Furthermore, the extrusion block comprises two parts, a large extrusion block head and a small extrusion block head. The large extrusion block head is movable and retractable in the push block hole, and the small extrusion block head is only located inside the joint body.
[0010] Furthermore: the small head of the extrusion block is located on an end face of the big head of the extrusion block, and the length of the big head of the extrusion block along a certain direction on the end face is obviously greater than the small head of the extrusion block, and on the side where the big head of the extrusion block is longer than the small head of the extrusion block, the end side faces of the two are respectively set as convex arc surfaces, and on the other side opposite thereto, the end side faces of the two are respectively set as concave arc surfaces, all convex arc surfaces and concave arc surfaces are concentric and parallel, and the radius of the convex arc surface of the big head of the extrusion block is greater than the radius of the convex arc surface of the small head of the extrusion block.
[0011] The utility model uses a locking screw thread to screw in and a taper pushing method to gradually expand the extrusion block movably arranged on the joint body outward, thereby tightening on the inner wall of the object to be tested, so that the test connector is tightly connected to the object to be tested, and the other end of the joint body can be connected to a tension sensor, which can realize the tension test of the object to be tested with a caliber. The modular design makes the connection and disassembly of the tooling more convenient. In addition, the utility model is made entirely of 304 stainless steel, which has a high corrosion resistance. The extrusion block can also be provided with a non-slip and scratch-resistant soft pad. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a general assembly drawing of a tension test joint of the utility model;
[0013] Figure 2 It is a schematic diagram of the joint body structure;
[0014] Figure 3 is a schematic diagram of the extrusion block structure;
[0015] Figure 4 It is a schematic diagram of the locking screw structure. DETAILED DESCRIPTION
[0016] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments.
[0017] like Figure 1 As shown, the utility model provides a tension test joint, which includes a joint body 1, an extrusion block 2, and a locking screw 3.
[0018] like Figure 2 As shown, the joint body 1 is a rod, and the outer diameter is made into a constant diameter or a variable diameter form according to the actual situation. One end of the joint body 1 is used to connect the tension sensor, so this end is made into a joint form that can adapt to the tension sensor, such as Figure 1 The hexagonal nut shown in the figure has a hexagonal outer surface that can be easily held with a wrench, and an inner surface that has an internal thread for connecting a tension sensor.
[0019] The other end of the connector body 1 is used to connect the object to be measured, so this end is made into a connector form that can adapt to the object to be measured. The utility model adopts the method of inserting the tensile test connector into the inside of the object to be measured with a caliber for bracing. Therefore, in the utility model, a through hole 11 is provided inside the connector body 1, and the end of the through hole close to the tensile sensor is provided with an internal thread, and the end close to the object to be measured is a light hole. A push block hole 12 is provided on the rod wall of the connector body 1 at the light hole, and the push block hole is used to install the extrusion block 2, and the through hole is used to pass the locking screw 3. The locking screw 3 can be screwed into the extrusion block 2 to expand, and is braced against the inner wall of the object to be measured to achieve connection.
[0020] Preferably, several push block holes are evenly distributed along the circumferential direction on the rod wall of the joint body 1, so that each extrusion block 2 can apply force evenly in all directions and support it tightly on the measured object to ensure a firm connection.
[0021] In the assembly, the extrusion block 2 must be able to be movably embedded in the push block hole, and must ensure good contact between the inner and outer locking screws 3 and the object to be tested, and must not fall off. Therefore, specifically, the structural form of the extrusion block 2 is as follows Figure 3As shown, it includes two parts, a big head 21 of the extrusion block and a small head 22 of the extrusion block. The two parts are made in one piece. The big head 21 of the extrusion block can be flexibly extended in the push block hole, and the small head 22 of the extrusion block is only located inside the joint body 1. The small head 22 of the extrusion block is located on an end face of the big head 21 of the extrusion block; and on this end face, the length of the big head 21 of the extrusion block is obviously greater than the small head 22 of the extrusion block along a certain direction; and on this side where the length of the big head 21 of the extrusion block is obviously greater than the small head 22 of the extrusion block, the end side faces of the big head 21 of the extrusion block and the small head 22 of the extrusion block are respectively set to convex arc surface A1 and convex arc surface A2, and on the other side opposite to this side, the end side faces of the big head 21 of the extrusion block and the small head 22 of the extrusion block are respectively set to concave arc surface B1 and concave arc surface B2; all convex arc surfaces and concave arc surfaces are concentric parallel arc surfaces, and the radius of the convex arc surface A1 of the big head 21 of the extrusion block must be greater than the radius of the convex arc surface A2 of the small head 22 of the extrusion block, and the radius of the concave arc surface B1 of the big head 21 of the extrusion block may be equal to or not equal to the radius of the concave arc surface B2 of the small head 22 of the extrusion block. The function of the convex arc surface A1 is to extend out of the joint body 1 and tighten it on the inner wall of the body to be tested; the function of the convex arc surface A2 is to tighten it on the inner wall of the joint body 1 to limit the extrusion block from further extending outward; the function of the concave arc surface B1 and the concave arc surface B2 is to cooperate with the locking screw 3 to withstand the extrusion force of the locking screw 3. Therefore, although the radii of the concave arc surface B1 and the concave arc surface B2 can be equal or unequal, the best effect is that the radius of the concave arc surface B1 is equal to the radius of the concave arc surface B2. If the radius of the concave arc surface B1 is smaller than the radius of the concave arc surface B2, it is possible that the convex arc surface A2 of the small head 22 of the extrusion block has already hit the inner wall of the joint body 1 before the locking screw 3 is tightened into place, while the convex arc surface A1 of the large head 21 of the extrusion block has not yet tightened to the inner wall of the body to be tested; on the contrary, if the radius of the concave arc surface B1 is larger than the radius of the concave arc surface B2, the locking screw 3 only contacts the concave arc surface B2, and the supporting force of the locking screw 3 is unstable. The extrusion block 2 may also be provided with a non-slip and anti-scratch soft pad.
[0022] The specific structure of the locking screw 3 is as follows: Figure 4 As shown, the joint body 1 is provided with a through hole, one end of the through hole is provided with an internal thread, and the other end is a smooth hole, an extrusion block 2 is provided at the smooth hole, and a locking screw 3 is provided with an external thread at one end correspondingly, which is used to cooperate with the internal thread of the through hole, and the other end of the locking screw 3 is a conical head, which squeezes the extrusion block 2 in the push block hole when passing through the smooth hole, so that it expands outwards. Since the other end of the locking screw 3 is a conical head, the extrusion block is gradually pushed, and the stroke of the screw is controlled by rotating the locking screw 3.
[0023] Therefore, the assembly structure of the utility model mainly adopts the spiral clamping method for fixing. When connecting, first install the extrusion block 2 into the push block hole of the joint body 1, and then insert the locking screw 3 into the joint body 1 and screw it in continuously. Then the conical head of the locking screw 3 continuously squeezes the extrusion block 2. The end of the joint body 1 connected to the object to be measured is inserted into the object to be measured. The extrusion block 2 is fully extruded and expanded by rotating the locking screw 3, so that the outside of the extrusion block 2 is in full contact with the object to be measured to achieve the locking effect; then the end of the joint body 1 connected to the tension sensor can be connected through the end joint, and then the tension test can be carried out. When disassembling, first remove the tension sensor, then unscrew the locking screw 3, the extrusion block 2 will naturally loosen, and the joint body 1 can be taken out. Through this device, the speed, stability and safety of the test are improved to a certain extent, so that the accuracy of the test data can be guaranteed.
Claims
1. A tensile test joint, characterized in that: It comprises a joint body (1), an extrusion block (2), and a locking screw (3); The joint body (1) is a rod, one end of which is connected to the tension sensor. A through hole (11) is provided inside the joint body (1). An end of the through hole (11) close to the tension sensor is provided with an internal thread, and the other end is a light hole. A push block hole (12) is provided on the rod wall at the light hole, and an extrusion block (2) is movably installed in the push block hole (12). The locking screw (3) is inserted into the through hole (11), one end of which is threadedly connected to the through hole (11), and the other end of which is provided with a conical head, and the conical head can squeeze the extrusion block (2) when passing through the light hole.
2. The tensile test connector according to claim 1, characterized in that: One end of the joint body (1) connected to the tension sensor is provided with a hexagonal nut.
3. The tensile test joint according to claim 1, characterized in that: The extrusion blocks (2) are evenly distributed along the circumferential direction on the rod wall of the joint body (1).
4. The tensile test joint according to claim 1 or 3, characterized in that: The extrusion block (2) comprises two parts, a large extrusion block head (21) and a small extrusion block head (22); the large extrusion block head (21) is movable and retractable in the push block hole (12), and the small extrusion block head (22) is only located inside the joint body (1).
5. The tensile test connector according to claim 4, characterized in that: The small extrusion block head (22) is located on an end face of the large extrusion block head (21), and the length of the large extrusion block head (21) along a certain direction on the end face is significantly greater than the small extrusion block head (22), and on the side where the large extrusion block head (21) is longer than the small extrusion block head (22), the end side faces of the two are respectively arranged as convex arc surfaces (A1, A2), and on the other side opposite thereto, the end side faces of the two are respectively arranged as concave arc surfaces (B1, B2), all convex arc surfaces and concave arc surfaces are concentric and parallel, and the radius of the convex arc surface (A1) of the large extrusion block head (21) is greater than the radius of the convex arc surface (A2) of the small extrusion block head (22).