Oil way structure of portable hydraulic cloth type hardness tester

Abstract

The utility model discloses an oil path structure of a portable hydraulic cloth type hardness tester, which comprises a hydraulic manifold block, a first one-way valve is arranged at the lower part in the hydraulic manifold block, a control valve hole is formed in the top of the hydraulic manifold block, a pressure control valve is arranged in the control valve hole, and a second one-way valve is arranged at the lower part in the hydraulic manifold block. Pressure oil passes through the first one-way valve, passes through the pressure control valve and then flows through the second one-way valve, generated pulses can be counteracted by the second one-way valve, and a standard rated pressure can always act on the one-way valves, so that in the pressurized reciprocating motion, as long as the rated pressure value is reached, the pressure can be controlled by the second one-way valve. And the pressure can be always kept at a rated pressure value no matter how many times of reciprocating motion are carried out, the change that the rated pressure value is smaller than the rated pressure value in the reciprocating motion of an existing hydraulic cloth type hardness tester is avoided, and the advantage of stabilizing the pressure is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic pressure Brinell hardness tester, in particular to an oil circuit structure of a portable hydraulic pressure Brinell hardness tester. Background Art

[0002] The hydraulic Brinell hardness tester is an instrument for measuring the hardness of a material. It calculates the hardness value by applying a certain pressure on the surface of the material and measuring the diameter of the indentation. It adopts the hydraulic principle and the standard steel ball of the Brinell hardness tester and is suitable for testing the hardness of metal materials. Working principle The working principle of the hydraulic Brinell hardness tester is based on the hydraulic system and the hardness testing principle. During the test, a certain pressure is applied to the standard steel ball manually or automatically, and then the steel ball is pressed into the surface of the material to be tested to a certain depth, and maintained for a certain time, and then the hardness is calculated according to the diameter of the indentation; Publication number: CN211697326U, discloses a portable magnetic hydraulic Brinell hardness tester, including a base and a hydraulic integrated block, a storage groove is provided on the top of the base, a mounting block is slidably connected to the inner surface of the storage groove, threaded rods are fixedly connected to both sides of the top of the mounting block, a lifting box is slidably connected between the outer surfaces of the two threaded rods, a rotating handle is rotatably connected to the front of the lifting box, and a protective cover is movably connected to the outer surface above the two threaded rods. The utility model relates to the technical field of hydraulic Brinell hardness tester. The portable magnetic hydraulic Brinell hardness tester has protrusions on both sides of the mounting block, which are matched with the stepped storage grooves to limit the mounting block, and the matching grooves and screws are used to effectively prevent the mounting block from shaking. When the Brinell hardness tester needs to be disassembled, the elastic telescopic rod can be matched with the push plate to push the mounting block upward, and the mounting block can be removed by rotating it. This structure is relatively simple, convenient for disassembly and installation, and easy to carry after disassembly.

[0003] However, there are some problems with the existing technology: the existing hydraulic Brinell hardness tester has a pressure control valve connected in parallel after two one-way valves. After reaching the rated pressure, the pressure control valve will open and then quickly close. Because the opening time and the falling speed are uncertain, and pulses will be generated at the moment of opening, the reciprocating motion of the pressurized pressure will cause the pressure to fall and the hydraulic pressure gauge to fall and shake. The holding pressure is unstable and is not within the 1% range of the standard Brinell test force. It needs to be repeatedly pressurized 3-4 times to reach the standard Brinell test standard. Therefore, we propose an oil circuit structure for a portable hydraulic Brinell hardness tester. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide an oil circuit structure of a portable hydraulic Brinell hardness tester, which is connected in parallel behind a first one-way valve through a pressure control valve, and then a second one-way valve is connected in series behind it. In this structure, after reaching the rated pressure, the time and the falling speed generated by the opening of the pressure control valve and the pulse generated will be offset by the second one-way valve in series, and there will be a standard rated pressure acting on the one-way valve all the time, so that in the pressurized reciprocating motion, as long as the rated pressure value is reached, no matter how many reciprocating motions are made, the pressure will always be maintained at the rated pressure value, unlike the existing hydraulic Brinell hardness tester, which will have the advantage of changing from the rated pressure value to the rated pressure value during the reciprocating motion.

[0005] The utility model is implemented as follows: an oil circuit structure of a portable hydraulic Brinell hardness tester comprises a hydraulic integrated block, a first one-way valve is arranged at the lower part of the hydraulic integrated block, a control valve hole is opened at the top of the hydraulic integrated block, a pressure control valve is arranged in the control valve hole, and the pressure control valve is located at the upper part of the hydraulic integrated block, a second one-way valve is arranged at the lower part of the hydraulic integrated block, and the pressure control valve is located above between the first one-way valve and the second one-way valve.

[0006] Optionally, an oil storage chamber is provided at the top of the hydraulic integrated block, and a fixing hole is provided on the inner wall of the oil storage chamber, and a first connecting pipe is fixedly connected in the fixing hole.

[0007] Optionally, one end of the first connecting pipe is fixedly connected to a second connecting pipe, and the second connecting pipe is located in the hydraulic integrated block. The second connecting pipe is arranged in an L shape, and the protruding end of the second connecting pipe is fixedly installed in the opening of the first one-way valve.

[0008] Optionally, a third connecting pipe is provided between the first one-way valve and the second one-way valve, a fourth connecting pipe is provided on the third connecting pipe, and one end of the fourth connecting pipe is fixedly mounted on the pressure control valve.

[0009] Optionally, a reverse flow valve is provided on the third connecting pipe, and the lower end of the reverse flow valve is fixedly installed on the bottom of the hydraulic integrated block.

[0010] Optionally, an ejection cylinder is provided at the bottom of the hydraulic integrated block, and a mounting hole is provided at the top of the hydraulic integrated block.

[0011] Optionally, a pressure relief valve hole is opened on the top of the hydraulic integrated block, and a pressure relief valve is arranged in the pressure relief valve hole.

[0012] Optionally, a plug hole is opened on the top of the hydraulic integrated block, a small plunger is arranged in the plug hole, and the small plunger is located in the hydraulic integrated block.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The pressure control valve is connected in parallel behind the first one-way valve, and then the second one-way valve is connected in series. In this structure, after the rated pressure is reached, the time and the falling speed of the pressure control valve opening and the pulse generated will be offset by the second one-way valve in series, and there will be a standard rated pressure acting on the one-way valve all the time, so that in the pressurized reciprocating motion, as long as the rated pressure value is reached, no matter how many reciprocating motions are made, the pressure will always be maintained at the rated pressure value, unlike the existing hydraulic Brinell hardness tester, which will have a rated pressure value that is less than the rated pressure value during the reciprocating motion.

[0015] 2. The hydraulic oil flows into the first connecting pipe through the oil storage chamber, and then flows into the second connecting pipe through the first connecting pipe, and then flows into the first one-way valve through the second connecting pipe, and then flows into the third connecting pipe through the first one-way valve. After flowing into the third connecting pipe, the reverse flow valve is activated to allow the hydraulic oil to flow into the fourth connecting pipe, and then the fourth connecting pipe discharges it into the pressure control valve. The pressure of the hydraulic oil is controlled and adjusted by the pressure control valve. After it is controlled and adjusted, it is then closed through the reverse flow valve, so that the hydraulic oil flows back to the third connecting pipe and finally to the second one-way valve, and the pulse generated is offset by the second one-way valve.

[0016] 3. A pressure gauge is arranged in the mounting hole to measure and indicate the pressure, and the ejection cylinder is used to drive the product to be ejected outward.

[0017] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram provided by the utility model;

[0019] Figure 2 This is a schematic diagram of the fourth connecting pipe provided by the utility model;

[0020] Figure 3 This is a schematic diagram of a first one-way valve provided by the utility model;

[0021] Figure 4 This is a schematic diagram of a third connecting pipe provided by the utility model.

[0022] In the figure: 1. hydraulic integrated block; 2. first one-way valve; 3. control valve hole; 4. pressure control valve; 5. second one-way valve; 6. oil storage chamber; 7. first connecting pipe; 8. second connecting pipe; 9. third connecting pipe; 10. fourth connecting pipe; 11. reverse flow valve; 12. ejection cylinder; 13. mounting hole; 14. pressure relief valve hole; 15. pressure relief valve; 16. small plunger; 17. plug hole. DETAILED DESCRIPTION

[0023] In order to further understand the content, features and effects of the utility model, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0024] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0025] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0026] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0027] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0028] The structure of the utility model is described in detail below in conjunction with the accompanying drawings.

[0029] like Figures 1 to 4 As shown, an oil circuit structure of a portable hydraulic Burkhardness tester provided by an embodiment of the utility model includes a hydraulic integrated block 1, a first one-way valve 2 is arranged at the lower part of the hydraulic integrated block 1, a control valve hole 3 is opened at the top of the hydraulic integrated block 1, a pressure control valve 4 is arranged in the control valve hole 3, and the pressure control valve 4 is located at the upper part of the hydraulic integrated block 1, a second one-way valve 5 is arranged at the lower part of the hydraulic integrated block 1, and the pressure control valve 4 is located above between the first one-way valve 2 and the second one-way valve 5.

[0030] Specifically, the pressure oil passes through the first one-way valve 2 and the pressure control valve 4 and then flows through the second one-way valve, and the pulses generated will be offset by the second one-way valve 5, and there will be a standard rated pressure acting on the one-way valve all the time, so that in the pressurized reciprocating motion, as long as the rated pressure value is reached, no matter how many reciprocating motions are made, the pressure will always be maintained at the rated pressure value, unlike the existing hydraulic Brinell hardness tester, which will have a rated pressure value during the reciprocating motion and change to a value less than the rated pressure value, thereby stabilizing the pressure.

[0031] Furthermore, the difference between the existing hydraulic Brinell hardness tester oil circuit structure and the new oil circuit structure is as follows Figure 3 and Figure 4 As shown, because the pressure control valve 4 is connected in parallel after the two one-way valves, after reaching the rated pressure, the pressure control valve 4 will open and then quickly close. Because the opening time and the fall-back speed are uncertain, and pulses will be generated at the moment of opening, the reciprocating motion of the pressurized pressure will cause a fall in pressure and a fall and jitter in the hydraulic pressure gauge. The national standard for the overflow valve is a 15% fall-back range, which is a normal range, but does not meet the measurement standards of the hydraulic layout.

[0032] Specifically, an oil storage chamber 6 is opened on the top of the hydraulic integrated block 1, and a fixing hole is opened on the inner wall of the oil storage chamber 6, and a first connecting pipe 7 is fixedly connected in the fixing hole; a second connecting pipe 8 is fixedly connected to one end of the first connecting pipe 7, and the second connecting pipe 8 is located in the hydraulic integrated block 1, the second connecting pipe 8 is L-shaped, and the protruding end of the second connecting pipe 8 is fixedly installed in the opening of the first one-way valve 2; a third connecting pipe 9 is arranged between the first one-way valve 2 and the second one-way valve 5, a fourth connecting pipe 10 is arranged on the third connecting pipe 9, and one end of the fourth connecting pipe 10 is fixedly installed on the pressure control valve 4; a reverse flow valve 11 is arranged on the third connecting pipe 9, and the lower end of the reverse flow valve 11 is fixedly installed on the bottom of the hydraulic integrated block 1.

[0033] The hydraulic oil flows into the first connecting pipe 7 through the oil storage chamber 6, and then flows into the second connecting pipe 8 through the first connecting pipe 7, and then flows into the first one-way valve 2 through the second connecting pipe 8, and then flows into the third connecting pipe 9 through the first one-way valve 2. After flowing into the third connecting pipe 9, the reverse flow valve 11 is started to allow the hydraulic oil to flow into the fourth connecting pipe 10, and then the fourth connecting pipe 10 discharges it into the pressure control valve 4. The pressure of the hydraulic oil is controlled and regulated by the pressure control valve 4. After it is controlled and regulated, it is then closed through the reverse flow valve 11, so that the hydraulic oil flows back to the third connecting pipe 9 and finally to the second one-way valve 5, and the pulse generated is offset by the second one-way valve 5.

[0034] An ejection cylinder 12 is provided at the bottom of the hydraulic integrated block 1 , and a mounting hole 13 is provided at the top of the hydraulic integrated block 1 .

[0035] A pressure gauge is provided in the mounting hole 13 to measure and indicate the pressure, and the ejection oil cylinder 12 is used to drive the product to be ejected outward.

[0036] A pressure relief valve hole 14 is provided at the top of the hydraulic integrated block 1 , and a pressure relief valve 15 is provided in the pressure relief valve hole 14 .

[0037] When the pressure exceeds the safety pressure value set by the pressure relief valve 15, the pressure relief valve 15 will automatically open to release the excess medium, thereby ensuring the safety of the system and equipment and preventing damage caused by excessive pressure.

[0038] A plug hole 17 is provided at the top of the hydraulic integrated block 1 , and a small plunger 16 is arranged in the plug hole 17 . The small plunger 16 is located in the hydraulic integrated block 1 .

[0039] The small plunger 16 can seal the hydraulic oil to avoid leakage, and by changing the position of the small plunger 16, the flow and pressure of the liquid or gas can be adjusted to achieve a control effect.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil circuit structure of a portable hydraulic Brinell hardness tester, comprising a hydraulic integrated block (1), characterized in that: A first one-way valve (2) is provided at the lower portion of the hydraulic integrated block (1); a control valve hole (3) is provided at the top of the hydraulic integrated block (1); a pressure control valve (4) is provided in the control valve hole (3), and the pressure control valve (4) is located at the upper portion of the hydraulic integrated block (1); a second one-way valve (5) is provided at the lower portion of the hydraulic integrated block (1), and the pressure control valve (4) is located above between the first one-way valve (2) and the second one-way valve (5).

2. The oil circuit structure of a portable hydraulic Brinell hardness tester according to claim 1, characterized in that: An oil storage chamber (6) is provided on the top of the hydraulic integrated block (1), and a fixing hole is provided on the inner wall of the oil storage chamber (6), wherein a first connecting pipe (7) is fixedly connected to the fixing hole.

3. The oil circuit structure of a portable hydraulic Brinell hardness tester according to claim 2, characterized in that: One end of the first connecting pipe (7) is fixedly connected to a second connecting pipe (8), and the second connecting pipe (8) is located in the hydraulic integrated block (1). The second connecting pipe (8) is arranged in an L shape, and the protruding end of the second connecting pipe (8) is fixedly installed in the opening of the first one-way valve (2).

4. The oil circuit structure of a portable hydraulic Brinell hardness tester according to claim 1, characterized in that: A third connecting pipe (9) is provided between the first one-way valve (2) and the second one-way valve (5), a fourth connecting pipe (10) is provided on the third connecting pipe (9), and one end of the fourth connecting pipe (10) is fixedly mounted on the pressure control valve (4).

5. The oil circuit structure of a portable hydraulic Brinell hardness tester according to claim 4, characterized in that: The third connecting pipe (9) is provided with a reverse flow valve (11), and the lower end of the reverse flow valve (11) is fixedly mounted on the bottom of the hydraulic integrated block (1).

6. The oil circuit structure of a portable hydraulic Brinell hardness tester according to claim 1, characterized in that: The bottom of the hydraulic integrated block (1) is provided with an ejection oil cylinder (12), and the top of the hydraulic integrated block (1) is provided with a mounting hole (13).

7. The oil circuit structure of a portable hydraulic Brinell hardness tester according to claim 1, characterized in that: A pressure relief valve hole (14) is provided on the top of the hydraulic integrated block (1), and a pressure relief valve (15) is provided in the pressure relief valve hole (14).

8. The oil circuit structure of a portable hydraulic Brinell hardness tester according to claim 1, characterized in that: A plug hole (17) is provided on the top of the hydraulic integrated block (1), a small plunger (16) is provided in the plug hole (17), and the small plunger (16) is located in the hydraulic integrated block (1).

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