Hydraulic pipe strength testing device

Abstract

The utility model relates to the technical field of hydraulic pipe testing, in particular to a hydraulic pipe strength testing device. Comprising a shell, a pressing mechanism and a clamping mechanism. A workbench is fixed in the shell; the downward pressing mechanism is arranged above the workbench and comprises a pressing disc and a power assembly. The clamping mechanism comprises a clamping plate, a driving assembly and an auxiliary assembly. When the power assembly drives the pressing disc to move downwards to abut against the upper end of the hydraulic pipe body so as to clamp the hydraulic pipe body on the pressing disc and the workbench for compressive strength testing, the auxiliary assembly drives the clamping plate to be away from the hydraulic pipe body by a preset distance. The hydraulic pipe body is prevented from being pressed and deformed to extrude the clamping plates, meanwhile, a certain protection effect is achieved, fragments are prevented from splashing after the hydraulic pipe body is broken, and the hydraulic pipe body is taken down after the compressive strength test is finished.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic pipe testing, in particular to a hydraulic pipe strength testing device. Background Art

[0002] The function of a hydraulic system's actuators (hydraulic cylinders and hydraulic motors) is to convert the pressure energy of a liquid into mechanical energy, thereby achieving the desired linear reciprocating or rotary motion. The hydraulic system's energy source (hydraulic pump) converts the mechanical energy of the prime mover into the pressure energy of a liquid. Hydraulic fittings play a crucial role in hydraulic systems and require compressive strength testing during production.

[0003] In the prior art, for example, a Chinese patent with the publication number CN218003117U, entitled "A Strength Testing Device for Hydraulic Pipe Fitting Production," discloses a technical solution in which an arc-shaped abutment plate abuts against the inner wall of a hydraulic steel pipe to secure the hydraulic pipe. The hydraulic plate is then extended by a hydraulic rod to move the hydraulic plate downward and abut against the upper end of the hydraulic pipe for a compressive strength test. However, during a compressive strength test of the hydraulic steel pipe, the hydraulic steel pipe may deform inward or outward. When the hydraulic steel pipe deforms inward, it may squeeze the limiting components within the hydraulic steel pipe, such as the rectangular slide, the arc-shaped abutment plate, and the threaded rod. This makes it difficult to remove the tested hydraulic steel pipe after the compressive strength test. Furthermore, the deformation and squeezing of the hydraulic steel pipe may damage the limiting components within the hydraulic steel pipe, thereby affecting subsequent compressive strength tests. This presents certain limitations. Utility Model Content

[0004] The utility model provides a hydraulic pipe strength testing device to solve the above problems.

[0005] The utility model adopts the following technical solutions: a hydraulic pipe strength testing device, comprising a shell, a pressing mechanism, and a clamping mechanism; a workbench is fixed in the shell; a control console is provided on the shell; and an observation window is provided on the shell;

[0006] The pressing mechanism is located above the workbench and includes a pressure plate and a power assembly. The pressure plate moves downward through the power assembly and presses against the upper end of the hydraulic pipe body. A pressure sensor is provided on the pressure plate to transmit the pressure value of the pressure plate to the control console.

[0007] The clamping mechanism includes two clamping plates, a drive assembly, and an auxiliary assembly. Two clamping plates are symmetrically located on either side of the pressure plate axis. The clamping plates are arc-shaped and slide radially along the pressure plate onto the workbench. The drive assembly drives the two clamping plates toward the hydraulic pipe body, clamping the hydraulic pipe body coaxially with the pressure plate. The auxiliary assembly drives the clamping plates away from the hydraulic pipe body when the power assembly drives the pressure plate downward to press against the upper end of the hydraulic pipe body, thereby clamping the hydraulic pipe body between the pressure plate and the workbench for compressive strength testing. This prevents the hydraulic pipe body from being deformed by pressure and squeezing the clamping plates, facilitating removal of the hydraulic pipe body after the compressive strength test.

[0008] Furthermore, the drive assembly includes a slider and a drive structure; two sliders are provided, which are symmetrically arranged on both sides of the pressure plate axis; the slider is arranged on the side of the clamping plate away from the pressure plate axis; the slider is installed on the workbench along the radial sliding direction of the pressure plate; a connecting tube is provided on the slider; the connecting tube is arranged along the radial direction of the pressure plate; the outer wall of the connecting tube is threadedly matched with the slider; the end of the connecting tube close to the clamping plate is rotatably connected to the clamping plate; the drive structure is used to drive the two sliders to drive the clamping plate to synchronously approach the hydraulic pipe body through the connecting tube, thereby clamping the hydraulic pipe body on the pressure plate and the workbench.

[0009] Furthermore, the power assembly includes a power hydraulic cylinder; the lower end of the piston rod of the power hydraulic cylinder and the pressure plate slide up and down; a transmission chamber is provided in the pressure plate; a pressure plate is slidably installed in the transmission chamber; the pressure plate divides the transmission chamber into an upper chamber and a lower chamber; the lower chamber is filled with hydraulic oil; the pressure plate and the lower end of the piston rod of the power hydraulic cylinder are fixedly connected; and a return spring is connected between the pressure plate and the power hydraulic cylinder.

[0010] Furthermore, the auxiliary component includes a rotating rod and a hydraulic rotating structure; the rotating rod is coaxially inserted in the connecting cylinder, and the end close to the outer shell is rotated with the outer shell; the rotating rod and the connecting cylinder are slidably matched by a spline; the oil chamber and the lower chamber of the hydraulic rotating structure are connected by an oil pipe, which is used to press the hydraulic oil in the lower chamber into the oil chamber of the hydraulic rotating structure when the power hydraulic cylinder drives the pressure plate to move down and press the upper end of the hydraulic pipe body and continue to move down. The hydraulic rotating structure drives the rotating rod to rotate, and the rotating rod drives the connecting cylinder to rotate, so that the splint is away from the hydraulic pipe body.

[0011] Furthermore, the hydraulic rotation structure includes a transmission hydraulic cylinder, a rack, and a gear; the rack is slidably mounted on a workbench; the gear is coaxially fixed to a rotating rod; the gear and rack are meshed; the transmission hydraulic cylinder is fixed to the workbench; the piston rod of the transmission hydraulic cylinder extends in the same direction as the rack; the oil chamber and the lower chamber of the transmission hydraulic cylinder are connected by an oil pipe; and the piston rod of the transmission hydraulic cylinder is fixedly connected to the rack. When the power hydraulic cylinder drives the pressure plate downward to press against the upper end of the hydraulic pipe body and continues to move downward, the hydraulic oil in the lower chamber is pressed into the oil chamber of the transmission hydraulic cylinder, the transmission hydraulic cylinder drives the rack to move, the rack drives the gear to rotate, the gear drives the rotating rod to rotate, and the rotating rod drives the connecting cylinder to rotate, thereby moving the clamp away from the hydraulic pipe body.

[0012] Furthermore, the driving structure includes a bidirectional screw rod; the threads at both ends of the bidirectional screw rod have opposite directions; the bidirectional screw rod is rotatably installed at the lower end of the workbench; and the bidirectional screw rod and the slider are threaded together.

[0013] The beneficial effect is that when the power assembly drives the pressure plate downward to press against the upper end of the hydraulic tube body to clamp the hydraulic tube body between the pressure plate and the workbench for compressive strength testing, the auxiliary assembly drives the clamping plate away from the hydraulic tube body by a preset distance. This prevents the hydraulic tube body from being deformed by pressure and squeezing the clamping plate, while also providing a certain degree of protection, preventing the hydraulic tube body from rupturing and fragments from flying, and facilitating the removal of the hydraulic tube body after the compressive strength test is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0015] Figure 1 This is a structural schematic diagram of an embodiment of a hydraulic pipe strength testing device of the present utility model;

[0016] Figure 2 It is a front view of an embodiment of the present utility model;

[0017] Figure 3 A cross-sectional view of an embodiment of the present utility model;

[0018] Figure 4 This is a schematic diagram of an embodiment of the present utility model with the observation window removed;

[0019] Figure 5 Schematic diagram of a clamping mechanism according to an embodiment of the present invention.

[0020] In the figure: 100, housing; 110, workbench; 120, observation window; 210, pressure plate; 220, transmission chamber; 230, pressure plate; 240, return spring; 250, power hydraulic cylinder; 310, splint; 320, slider; 330, connecting tube; 340, rotating rod; 350, transmission hydraulic cylinder; 360, rack; 370, gear; 400, hydraulic pipe body. DETAILED DESCRIPTION

[0021] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and are not to be construed as limiting the present invention. 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.

[0022] The terms "first" and "second" in the description and claims of the present invention may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0023] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential" and the like 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.

[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0025] An embodiment of a hydraulic pipe strength testing device of the present utility model is as follows Figures 1 to 5 Schematic diagram of a hydraulic pipe strength testing device, comprising a housing 100, a pressing mechanism, and a clamping mechanism; a workbench 110 is fixed in the housing 100; a console is provided on the housing 100; and an observation window 120 is provided on the housing 100;

[0026] The pressing mechanism is arranged above the workbench 110, and includes a pressure plate 210 and a power assembly; the pressure plate 210 moves downward through the power assembly and presses against the upper end of the hydraulic tube body 400; a pressure sensor is provided on the pressure plate 210 to transmit the pressure value of the pressure plate 210 to the control console; the power assembly includes a power hydraulic cylinder 250; the lower end of the piston rod of the power hydraulic cylinder 250 and the pressure plate 210 slide up and down; a transmission chamber 220 is provided in the pressure plate 210; a pressure plate 230 is slidably installed in the transmission chamber 220; the pressure plate 230 divides the transmission chamber 220 into an upper chamber and a lower chamber; the lower chamber is filled with hydraulic oil; the pressure plate 230 and the lower end of the piston rod of the power hydraulic cylinder 250 are fixedly connected; a return spring 240 is connected between the pressure plate 210 and the power hydraulic cylinder 250.

[0027] The clamping mechanism includes a clamping plate 310, a driving assembly, and an auxiliary assembly; there are two clamping plates 310, symmetrically arranged on both sides of the axis of the pressure plate 210; the clamping plates 310 are arc-shaped; the clamping plates 310 are radially slidably installed on the workbench 110 along the pressure plate 210.

[0028] The driving assembly is used to drive the two clamping plates 310 toward the hydraulic pipe body 400 and clamp the hydraulic pipe body 400 to be coaxial with the pressure plate 210; the driving assembly includes a slider 320 and a driving structure; there are two sliders 320, which are symmetrically arranged on both sides of the axis of the pressure plate 210; the slider 320 is arranged on the side of the clamping plate 310 away from the axis of the pressure plate 210; the slider 320 is radially slidable along the pressure plate 210 and installed on the workbench 110; a connecting tube 330 is provided on the slider 320; the connecting tube 330 is radially arranged along the pressure plate 210; the outer wall of the connecting tube 330 and the slider 320 are threadedly engaged; the end of the connecting tube 330 close to the clamping plate 310 is rotatably connected to the clamping plate 310; the driving structure is used to drive the two sliders 320 to drive the clamping plate 310 to synchronously approach the hydraulic pipe body 400 through the connecting tube 330, thereby clamping the hydraulic pipe body 400 on the pressure plate 210 and the workbench 110.

[0029] The auxiliary assembly is used to move the clamping plate 310 away from the hydraulic tube body 400 when the power assembly drives the pressure plate 210 downward to press against the upper end of the hydraulic tube body 400, thereby clamping the hydraulic tube body 400 between the pressure plate 210 and the workbench 110 for the compressive strength test. This prevents the hydraulic tube body 400 from being deformed by pressure and squeezing the clamping plate 310, making it easier to remove the hydraulic tube body 400 after the compressive strength test. The auxiliary components include a rotating rod 340 and a hydraulic rotating structure; the rotating rod 340 is coaxially inserted in the connecting cylinder 330, and the end close to the outer shell 100 is rotatably matched with the outer shell 100; the rotating rod 340 and the connecting cylinder 330 are slidably matched by a spline; the oil chamber and the lower chamber of the hydraulic rotating structure are connected by an oil pipe, which is used to press the hydraulic oil in the lower chamber into the oil chamber of the hydraulic rotating structure when the power hydraulic cylinder 250 drives the pressure plate 210 to move downward to press the upper end of the hydraulic tube body 400 and continue to move downward. The hydraulic rotating structure drives the rotating rod 340 to rotate, and the rotating rod 340 drives the connecting cylinder 330 to rotate, so that the splint 310 is away from the hydraulic tube body 400. The hydraulic rotation structure includes a transmission hydraulic cylinder 350, a rack 360, and a gear 370; the rack 360 is slidably mounted on the workbench 110; the gear 370 is coaxially fixed to the rotating rod 340; the gear 370 and the rack 360 are meshed; the transmission hydraulic cylinder 350 is fixed to the workbench 110; the extension direction of the piston rod of the transmission hydraulic cylinder 350 is the same as the extension direction of the rack 360; the oil chamber and the lower chamber of the transmission hydraulic cylinder 350 are connected through an oil pipe; the piston rod of the transmission hydraulic cylinder 350 and the rack 360 are fixedly connected. When the power hydraulic cylinder 250 drives the pressure plate 210 to move downward to press against the upper end of the hydraulic tube body 400 and continue to move downward, the hydraulic oil in the lower chamber is pressed into the oil chamber of the transmission hydraulic cylinder 350, and the transmission hydraulic cylinder 350 drives the rack 360 to move, and the rack 360 drives the gear 370 to rotate, and the gear 370 drives the rotating rod 340 to rotate, and the rotating rod 340 drives the connecting tube 330 to rotate, so that the splint 310 is away from the hydraulic tube body 400.

[0030] In this embodiment, the drive structure includes a bidirectional screw with opposite thread directions at both ends, which is rotatably mounted on the lower end of the workbench 110 and threadedly engaged with the slider 320. A clamping motor is connected to the bidirectional screw.

[0031] In combination with the above embodiments, the usage principle and working process of the utility model are as follows: the hydraulic pipe body 400 to be tested is placed under the pressure plate 210, the clamping motor is started, the two sliders 320 are driven to drive the connecting tube 330 and the clamping plate 310 to approach each other, the hydraulic pipe body 400 is clamped on the workbench 110, and the power hydraulic cylinder 250 is started. When the power hydraulic cylinder 250 drives the pressure plate 210 to move down to press the upper end of the hydraulic pipe body 400 and continue to move down, the hydraulic oil in the lower chamber is pressed into the oil chamber of the transmission hydraulic cylinder 350, and the transmission hydraulic cylinder 350 drives the rack 360 to move, the rack 360 drives the gear 370 to rotate, the gear 370 drives the rotating rod 340 to rotate, and the rotating rod 340 drives the connecting tube 330 to rotate, so that the clamping plate 310 is away from the hydraulic pipe body 400. When the pressure plate 230 is in contact with the bottom wall of the transmission chamber 220, the pressure plate 230 and the pressure plate 210 are rigidly connected, preventing damage to the pressure plate 210 caused by excessive pressure. After the compressive strength test is completed, the clamping plate 310 is moved away and reset. The hydraulic pipe body 400 is removed.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hydraulic pipe strength testing device, characterized by: It includes a shell, a pressing mechanism, and a clamping mechanism; a workbench is fixed inside the shell; The pressing mechanism is arranged above the workbench and includes a pressure plate and a power assembly. The pressure plate moves downward through the power assembly and presses against the upper end of the hydraulic pipe body. The clamping mechanism includes a clamping plate, a driving assembly, and an auxiliary assembly; there are two clamping plates, which are symmetrically arranged on both sides of the pressure plate axis; the clamping plates are arc-shaped; the clamping plates are installed on the workbench along the radial sliding of the pressure plate; the driving assembly is used to drive the two clamping plates to approach the hydraulic pipe body and clamp the hydraulic pipe body to be coaxial with the pressure plate; the auxiliary assembly is used to drive the clamping plates away from the hydraulic pipe body when the power assembly drives the pressure plate to move down and press the upper end of the hydraulic pipe body to clamp the hydraulic pipe body on the pressure plate and the workbench for compressive strength testing.

2. A hydraulic pipe strength testing device according to claim 1, characterized in that: The driving assembly includes a slider and a driving structure; there are two sliders, which are symmetrically arranged on both sides of the pressure plate axis; the slider is arranged on the side of the clamping plate away from the pressure plate axis; the slider is mounted on the workbench and slides radially along the pressure plate; a connecting tube is provided on the slider; the connecting tube is arranged radially along the pressure plate; the outer wall of the connecting tube is threadedly matched with the slider; the end of the connecting tube close to the clamping plate is rotatably connected to the clamping plate; the driving structure is used to drive the two sliders to drive the clamping plate to approach the hydraulic pipe body synchronously through the connecting tube.

3. A hydraulic pipe strength testing device according to claim 2, characterized in that: The power assembly includes a power hydraulic cylinder; the lower end of the piston rod of the power hydraulic cylinder and the pressure plate slide together up and down; a transmission chamber is provided in the pressure plate; a pressure plate is slidably installed in the transmission chamber; the pressure plate divides the transmission chamber into an upper chamber and a lower chamber; the lower chamber is filled with hydraulic oil; the pressure plate and the lower end of the piston rod of the power hydraulic cylinder are fixedly connected; a return spring is connected between the pressure plate and the power hydraulic cylinder.

4. A hydraulic pipe strength testing device according to claim 3, characterized in that: The auxiliary components include a rotating rod and a hydraulic rotating structure; the rotating rod is coaxially inserted in the connecting cylinder, and the end close to the outer shell is rotated with the outer shell; the rotating rod and the connecting cylinder are slidably matched by a spline; the oil chamber and the lower chamber of the hydraulic rotating structure are connected by an oil pipe, which is used to press the hydraulic oil in the lower chamber into the oil chamber of the hydraulic rotating structure when the power hydraulic cylinder drives the pressure plate to move downward to press the upper end of the hydraulic pipe body and continue to move downward. The hydraulic rotating structure drives the rotating rod to rotate, and the rotating rod drives the connecting cylinder to rotate.

5. A hydraulic pipe strength testing device according to claim 4, characterized in that: The hydraulic rotation structure includes a transmission hydraulic cylinder, a rack, and a gear; the rack is slidably mounted on a workbench; the gear is coaxially fixed to a rotating rod; the gear and the rack are meshed; the transmission hydraulic cylinder is fixed to the workbench; the extension direction of the piston rod of the transmission hydraulic cylinder is the same as that of the rack; the oil chamber and the lower chamber of the transmission hydraulic cylinder are connected through an oil pipe; the piston rod of the transmission hydraulic cylinder and the rack are fixedly connected.

6. A hydraulic pipe strength testing device according to claim 2, characterized in that: The driving structure includes a bidirectional screw rod; the threads at both ends of the bidirectional screw rod are in opposite directions; the bidirectional screw rod is rotatably installed at the lower end of the workbench; and the bidirectional screw rod and the slider thread are matched.

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