Bellows compressive strength testing equipment

Abstract

The utility model relates to the technical field of bellows production, and in particular to a bellows compressive strength testing device, comprising a base, two support rods, a clamping assembly, a bellows and a pressure-applying assembly, wherein the two support rods are fixedly arranged on the inner side of the base, the clamping assembly is installed on the inner side of the base, the bellows is sleeved on the outside of the support rods, and the pressure-applying assembly is arranged on the inner side of the bottom of the base, the clamping assembly comprises a first oil cylinder installed inside one side of the base, a first pressure sensor is installed at the telescopic end of the first oil cylinder, and a lifting frame is installed on the top of the first pressure sensor. After the bellows compressive strength testing device effectively clamps the bellows, it effectively supports the inner side of the pressure-applying area, so that the pressure only acts on the local part of the bellows, avoiding the overall deformation of the bellows affecting the test data, thereby systematically understanding the relationship between the material, wall thickness and compressive strength of the bellows, and ensuring the accuracy of the test data.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows production, in particular to a bellows compressive strength detection device. Background Art

[0002] Metal bellows is a kind of pipe with regular wave-like appearance. Commonly used metal bellows are carbon steel, stainless steel, steel lined with plastic, aluminum, etc. It is mainly used for non-concentric axial transmission with a small bending radius, or irregular turning, expansion, or absorbing thermal deformation of pipes, or for connecting pipes to pipes or pipes to equipment in occasions where it is not convenient to install with fixed elbows.

[0003] The compressive strength of metal bellows is mainly determined by factors such as material, wall thickness, and diameter. There are two main types of compressive strength of metal bellows. One refers to the pressure that the bellows can withstand after being compressed as a whole and deforming or rupturing. The other is to apply pressure to the pipe wall, causing some areas to be dented, deformed or damaged, in order to detect the influence of material and wall thickness on the compressive strength of the bellows. When applying pressure to the pipe wall and testing the compressive strength, the bellows needs to be effectively clamped to avoid the overall compression deformation of the bellows during the pressure process. The existing clamping components cannot effectively support the compressed area of ​​the inner wall of the bellows, which causes the overall deformation of the bellows when under pressure, resulting in inaccurate detection data. Therefore, it is necessary to effectively support the inner wall of the bellows during testing. Utility Model Content

[0004] The utility model aims at the defects in the prior art and provides a bellows compressive strength detection device.

[0005] The utility model is realized through the following technical solutions:

[0006] A bellows compressive strength testing device comprises a base, two support rods, a clamping assembly, a bellows and a pressure-applying assembly, wherein the two support rods are fixedly arranged on the inner side of the base, the clamping assembly is installed on the inner side of the base, the bellows is sleeved on the outside of the support rods, the pressure-applying assembly is arranged on the inner side of the bottom of the base, the clamping assembly comprises a first oil cylinder installed inside one side of the base, a first pressure sensor is installed at the telescopic end of the first oil cylinder, a lifting frame is installed on the top of the first pressure sensor, a pressure rod is fixedly arranged on the inner side of the lifting frame, and a clamping pad is clamped at the bottom end of the pressure rod.

[0007] In a preferred embodiment of the utility model, the pressure assembly includes a mounting plate, a second oil cylinder, a pressure plate, a second pressure sensor, a pressure strip and a display, the mounting plate is fixedly arranged at both ends of the bottom of the base, the second oil cylinder is installed on the inner side of the mounting plate, the pressure plate is fixedly arranged at the end of the telescopic end of the second oil cylinder, the second pressure sensor is installed at the bottom of the pressure plate, the pressure strip is installed at the bottom of the second pressure sensor, and the display is installed at the top of the pressure plate;

[0008] The main function of the pressure component is to apply pressure to the top of the fixed bellows, so as to record the pressure that causes the bellows to deform or break, so as to systematically understand the compressive strength of the bellows.

[0009] In a preferred embodiment of the utility model, the pressure rod is located outside the top of the support rod, the vertical section of the lifting frame is an L-shaped structure, and the bottom of one end of the pressure rod is in contact with the inner side of the bottom of the lifting frame;

[0010] The corresponding positions of the pressure rod and the support rod mainly ensure the clamping effect of the bellows. The L-shaped lifting frame not only provides sufficient space for the installation of the first oil cylinder at the bottom, but also effectively improves the fixing effect of the pressure rod.

[0011] In a preferred embodiment of the utility model, a guide block is arranged on the back of the lifting frame, and a guide groove cooperating with the guide block is vertically opened on the inner side of the base.

[0012] In a preferred embodiment of the present invention, the bottom of the pressure strip is a conical structure, and the pressure strip is located on the outside of the top between the two pressure rods.

[0013] The beneficial effects of the utility model are:

[0014] After the bellows compressive strength testing equipment has effectively clamped the bellows, it will effectively support the inner side of the pressure area, so that the pressure only acts on the local part of the bellows, avoiding the overall deformation of the bellows affecting the test data, thereby systematically understanding the relationship between the bellows material, wall thickness and compressive strength, and ensuring the accuracy of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the bellows clamping structure of the bellows compressive strength testing device of the utility model;

[0016] Figure 2 This is a schematic diagram of the main structure of the bellows compressive strength testing device of the utility model;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the bellows compressive strength testing device of the utility model;

[0018] Figure 4The utility model is a schematic diagram of the structure of the clamping assembly of the bellows compressive strength testing device.

[0019] In the figure: 1. base; 2. support rod; 3. clamping assembly; 31. first oil cylinder; 32. first pressure sensor; 33. lifting frame; 34. pressure rod; 35. clamping pad; 4. bellows; 5. pressure assembly; 51. mounting plate; 52. second oil cylinder; 53. pressure plate; 54. second pressure sensor; 55. pressure strip; 56. display. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more specific definition of the protection scope of the present invention. The directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc., are only for reference to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present invention, rather than to limit the present invention.

[0021] like Figure 1-4 A bellows compressive strength testing device shown in the figure includes a base 1, two support rods 2, a clamping assembly 3, a bellows 4 and a pressure-applying assembly 5. The two support rods 2 are fixedly arranged on the inner side of the base 1, the clamping assembly 3 is installed on the inner side of the base 1, the bellows 4 is sleeved on the outside of the support rods 2, the pressure-applying assembly 5 is arranged on the inner side of the bottom of the base 1, and the clamping assembly 3 includes a first oil cylinder 31 installed inside one side of the base 1, a first pressure sensor 32 is installed at the telescopic end of the first oil cylinder 31, a lifting frame 33 is installed on the top of the first pressure sensor 32, a pressure rod 34 is fixedly arranged on the inner side of the lifting frame 33, and a clamping pad 35 is clamped at the bottom end of the pressure rod 34.

[0022] Specifically, the pressure assembly 5 includes a mounting plate 51, a second oil cylinder 52, a pressure plate 53, a second pressure sensor 54, a pressure bar 55 and a display 56. The mounting plate 51 is fixedly arranged at both ends of the bottom of the base 1, the second oil cylinder 52 is installed on the inner side of the mounting plate 51, the pressure plate 53 is fixedly arranged at the telescopic end of the second oil cylinder 52, the second pressure sensor 54 is installed at the bottom of the pressure plate 53, the pressure bar 55 is installed at the bottom of the second pressure sensor 54, and the display 56 is installed at the top of the pressure plate 53. The pressure rod 34 is located on the outside of the top of the support rod 2, and the vertical section of the lifting frame 33 is an L-shaped structure. The bottom of one end of the pressure rod 34 contacts the inner side of the bottom of the lifting frame 33. A guide block is arranged on the back of the lifting frame 33, and a guide groove matching it is vertically opened on the inner side of the base 1. The bottom of the pressure bar 55 is a conical structure, and the pressure bar 55 is located on the outside of the top between the two pressure rods 34.

[0023] In this embodiment, the bellows 4 is first sleeved on the surface of the support rod 2, and then the clamping assembly 3 is controlled to clamp and fix the bellows 4, and the first oil cylinder 31 is controlled to contract so that the lifting frame 33 fixed at its telescopic end descends along the guide groove on the inner side of the base 1. At this time, the pressure rod 34 descends until the clamping pad 35 at its bottom contacts the top of the bellows 4. After the pressure is applied to the preset pressure of the first pressure sensor 32, the first oil cylinder 31 stops further contraction, thereby achieving the effect of clamping and fixing the bellows 4 and effectively supporting the inner side of the pressure area.

[0024] Furthermore, the pressure-applying assembly 5 is controlled to apply pressure to the supporting clamping area. At this time, the second oil cylinder 52 on the inner side of the mounting plate 51 contracts, driving the pressure plate 53 fixed at its telescopic end to descend. After the bottom pressure bar 55 acts on the surface of the bellows 4, the second oil cylinder 52 continues to contract until the pressure bar 55 squeezes and causes the pressure area on the surface of the bellows 4 to bend, deform or rupture. At this time, the second pressure sensor 54 records the maximum pressure on the surface of the bellows 4 and displays it on the surface of the display 56, so that the experimenter can record and analyze the data, thereby systematically understanding the influence of factors such as the material and wall thickness of the bellows 4 on the compressive strength of the bellows 4. The device can effectively avoid the problem of the overall compressive deformation of the bellows 4 and the influence of the detection data, and more accurately measure the compressive strength of the wall of the bellows 4.

[0025] It should be noted that the parts not covered in the present invention are the same as the prior art or can be implemented by the prior art; the various drives in the present invention can be implemented by corresponding power structures such as cylinders, oil cylinders, electric cylinders, motors, etc. in combination with connecting rods, guide rods, etc., and are not limited to the description in the specification and the structures in the drawings.

[0026] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "set", "provided with", etc. 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 directly connected or 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 the present utility model can be understood according to specific circumstances.

[0027] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. 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.

Claims

1. A bellows compressive strength testing device, comprising a base (1), two support rods (2), a clamping assembly (3), a bellows (4) and a pressure-applying assembly (5), characterized in that: The two support rods (2) are fixedly arranged on the inner side of the base (1), the clamping assembly (3) is installed on the inner side of the base (1), the bellows (4) is sleeved on the outside of the support rods (2), and the pressure assembly (5) is arranged on the inner side of the bottom of the base (1); The clamping assembly (3) comprises a first oil cylinder (31) installed inside one side of the base (1); a first pressure sensor (32) is installed at the telescopic end of the first oil cylinder (31); a lifting frame (33) is installed at the top of the first pressure sensor (32); a pressure rod (34) is fixedly arranged on the inner side of the lifting frame (33); and a clamping pad (35) is clamped at the bottom end of the pressure rod (34).

2. The bellows compressive strength testing device according to claim 1, characterized in that: The pressure assembly (5) comprises a mounting plate (51), a second oil cylinder (52), a pressure plate (53), a second pressure sensor (54), a pressure strip (55) and a display (56); the mounting plate (51) is fixedly arranged at both ends of the bottom of the base (1); the second oil cylinder (52) is installed on the inner side of the mounting plate (51); the pressure plate (53) is fixedly arranged at the telescopic end of the second oil cylinder (52); the second pressure sensor (54) is installed at the bottom of the pressure plate (53); the pressure strip (55) is installed at the bottom of the second pressure sensor (54); and the display (56) is installed at the top of the pressure plate (53).

3. The bellows compressive strength testing device according to claim 1, characterized in that: The pressure rod (34) is located outside the top of the support rod (2); the vertical section of the lifting frame (33) is an L-shaped structure; the bottom of one end of the pressure rod (34) contacts the inner side of the bottom of the lifting frame (33).

4. The bellows compressive strength testing device according to claim 1, characterized in that: The back of the lifting frame (33) is provided with a guide block, and the inner side of the base (1) is vertically provided with a guide groove cooperating with the guide block.

5. The bellows compressive strength testing device according to claim 2, characterized in that: The bottom of the pressure strip (55) is in a conical structure, and the pressure strip (55) is located on the outside of the top between the two pressure rods (34).

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