Hydraulic oil cylinder pressure measuring device

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, and discloses a hydraulic oil cylinder pressure measuring device which comprises a hydraulic pump, ball valves and a stop valve, the adjacent sides of the two ball valves are communicated with connecting ends, the adjacent ends of the two connecting ends are communicated with conveying pipes, the other ends of the two conveying pipes are communicated with a pressure sensor, and the pressure sensor is connected with the hydraulic pump. The right side of the ball valve communicates with a first connecting pipe, the left side of the stop valve communicates with a second connecting pipe, the first connecting pipe and the second connecting pipe are in sliding connection through a connecting piece, the top of the outer wall of the connecting piece communicates with an air inlet, and the bottom end of the air inlet communicates with an air pipe. According to the utility model, the ball valve and the pressure sensor are directly connected through the conveying pipe, the pressure in the ball valve is directly measured, gas is injected through the gas inlet, so that the expansion ring is quickly expanded, the expansion ring is filled with a pipeline gap, the gas tightness between pipelines is ensured, and the accuracy of pressure measurement is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder pressure measuring device. Background Art

[0002] A hydraulic sensor can convert the sensed liquid or gas thrust into a standard electrical signal for external output. In many mechanical devices, the oil cylinder plays a crucial role. To ensure the normal operation and safety of the device, it is necessary to accurately measure the pressure inside the oil cylinder.

[0003] After retrieval, the Chinese patent publication number is: CN216922710U, which discloses a hydraulic cylinder thrust measuring device for measuring the thrust of a hydraulic cylinder. The hydraulic cylinder thrust measuring device includes a hydraulic pump, an auxiliary oil cylinder, a pressure sensor, and a controller. The hydraulic pump is used to drive the piston rod of the hydraulic cylinder to extend and retract; the hydraulic pump is also used to drive the piston rod of the auxiliary oil cylinder to extend and retract. The free end of the piston rod of the auxiliary oil cylinder has a force-applying contact; the force-receiving contact of the pressure sensor abuts against the force-applying contact, and the pressure sensor is used to detect the force applied by the force-applying contact to the force-receiving contact; electrically connected to the pressure sensor, the controller is used to calculate the magnitude of the thrust of the hydraulic cylinder according to the measurement signal of the pressure sensor. The hydraulic oil provided by the hydraulic pump flows to the hydraulic cylinder and the auxiliary oil cylinder respectively. The piston rod of the auxiliary oil cylinder extends and abuts against the pressure sensor. The pressure sensor measures the thrust information and transmits it to the controller, and the controller calculates to obtain the thrust of the hydraulic cylinder. However, the existing measurement of the pressure inside the oil cylinder requires the mediation of equipment, and at the same time, the airtightness of the connection is insufficient, which will lead to inaccurate measurement. Therefore, a hydraulic cylinder pressure measuring device is proposed to solve the above problems. Summary of the Utility Model

[0004] In order to make up for the above deficiencies, the utility model provides a hydraulic cylinder pressure measuring device, aiming to improve the problems of low accuracy and inconvenient operation existing in the traditional pressure measurement method in the prior art.

[0005] To achieve the above object, the utility model adopts the following technical solutions: A hydraulic cylinder pressure measuring device includes a hydraulic pump, a ball valve and a stop valve. Adjacent sides of the two ball valves are both communicated with connection ends. Adjacent ends of the two connection ends are both communicated with conveying pipes. The other ends of the two conveying pipes are communicated with a pressure sensor. The right side of the ball valve is communicated with a first connecting pipe. The left side of the stop valve is communicated with a second connecting pipe. The first connecting pipe and the second connecting pipe are slidably connected through a connecting member. The top of the outer wall of the connecting member is communicated with an air inlet. The bottom ends of the air inlets are both communicated with air pipes. The other ends of the two air pipes are both communicated with expansion rings. The inner walls of the two expansion rings are fixedly connected to the left and right ends of the outer wall of the connecting member. The top end of the outer wall of the air inlet is threadedly connected with a sealing valve. The outer wall of the connecting member is provided with a plurality of installation grooves. A plurality of clamping columns are slidably connected inside the plurality of installation grooves. Adjacent ends of the plurality of clamping columns are fixedly connected with second springs. A plurality of clamping grooves are provided on the outer walls of the first connecting pipe and the second connecting pipe. A control mechanism is arranged inside the stop valve.

[0006] Through the above technical solutions: The pressure inside the ball valve is directly measured by the pressure sensor. The ball valve and the stop valve are communicated with each other through a connecting member. By injecting gas into the expansion ring, the expansion ring fills the connecting gap to achieve the airtightness between the pipes, so as to obtain a more accurate pressure value and accurately measure the pressure inside the oil cylinder connected to the ball valve and the stop valve, so as to ensure the normal operation, safety performance of the equipment, and conduct fault diagnosis and performance optimization.

[0007] As a further description of the above technical solutions:

[0008] The control mechanism includes two limiting rods. The left and right ends of the two limiting rods are fixedly connected to the inner wall of the stop valve. A throttle column is slidably connected between the adjacent two of the two limiting rods. Adjacent ends of the two throttle columns are fixedly connected with inclined blocks. Air holes are provided on the left and right sides inside the stop valve. A plurality of first springs are fixedly connected to the outer walls of the two limiting rods. A fixing frame is fixedly connected to the top of the stop valve. An adjusting bolt is threadedly connected inside the fixing frame. A limiting slide rod is threadedly connected to the outer wall of the adjusting bolt. The bottom end of the limiting slide rod penetrates through the top of the stop valve and is fixedly connected with a pressing block.

[0009] Through the above technical solutions: By rotating the adjusting bolt to drive the limiting slide rod to slide downward, the pressing block is inserted between the inclined blocks. By extrusion, the throttle column expands to both sides, and the end of the throttle column is inserted into the air hole, so as to achieve the throttling and sealing treatment of the two ends of the pipeline and improve the throttling effect.

[0010] As a further description of the above technical solutions:

[0011] The control mechanism further includes a gasket, and the inner wall of the gasket is fixedly connected to the outer wall of the intercepting column.

[0012] Through the above technical solution: The gasket is installed at the end of the intercepting column. After the intercepting column is inserted into the air hole, the sealing effect is improved through the gasket.

[0013] As a further description of the above technical solution:

[0014] A rotating shaft is rotatably connected to the top of the pressure sensor, and a protective cover is rotatably connected to the outer wall of the rotating shaft.

[0015] Through the above technical solution: The surface of the pressure sensor is protected by the protective cover to avoid being damaged by knocking.

[0016] As a further description of the above technical solution:

[0017] A limiting plate is slidably connected to the outer wall of the delivery pipe, and the left side of the limiting plate is fixedly connected to the right side of the hydraulic pump.

[0018] Through the above technical solution: The delivery pipe is limited by the limiting plate to avoid the situation that the staff stumbles due to the long pipeline.

[0019] As a further description of the above technical solution:

[0020] A controller is fixedly connected to the front side of the hydraulic pump, and the controller is electrically connected to the hydraulic pump.

[0021] Through the above technical solution: The operation equipment on the entire device can be conveniently controlled simply by the controller.

[0022] As a further description of the above technical solution:

[0023] Support columns are fixedly connected to the four corners at the bottom of the hydraulic pump, and the bottom ends of the plurality of support columns are fixedly connected with mounting plates.

[0024] Through the above technical solution: The hydraulic pump is supported by the support columns to improve the stability of the hydraulic pump.

[0025] As a further description of the above technical solution:

[0026] Screw holes are formed in the tops of the plurality of mounting plates, and a placement groove is formed in the top of the hydraulic pump.

[0027] Through the above technical solution: The support columns can be conveniently reinforced through the screw holes, improving the overall firmness of the hydraulic pump and reducing the shaking generated during operation.

[0028] The utility model has the following beneficial effects:

[0029] 1. In the present utility model, a ball valve and a pressure sensor are directly connected through a delivery pipe to directly measure the pressure inside the ball valve, obtaining a more accurate pressure value. Gas is injected through the air inlet, and the gas is injected into the expansion ring through the air pipe, causing the expansion ring to expand rapidly, filling the gap between the pipelines, ensuring the airtightness between the pipelines, thereby improving the accuracy of pressure measurement. By squeezing the second spring, the clamping post is driven to insert into the clamping groove to complete the firm connection between the pipelines.

[0030] 2. In the present utility model, by rotating the adjusting bolt, the limit sliding rod slides downward, thereby driving the extrusion block to be inserted between the two inclined blocks, driving the intercepting posts on both sides of the inclined blocks to expand to both sides, and enabling the intercepting posts to be inserted into the air holes, thus quickly completing the intercepting and sealing treatment of the air holes. Description of the Drawings

[0031] Figure 1 Is a three-dimensional view of a hydraulic cylinder pressure measuring device proposed by the present utility model;

[0032] Figure 2 Is a structural schematic diagram of a hydraulic cylinder pressure measuring device proposed by the present utility model;

[0033] Figure 3 Is an exploded view of a hydraulic cylinder pressure measuring device proposed by the present utility model;

[0034] Figure 4 Is a partial structural schematic diagram of a hydraulic cylinder pressure measuring device proposed by the present utility model;

[0035] Figure 5 Is a split view of a hydraulic cylinder pressure measuring device proposed by the present utility model.

[0036] Legend Explanation:

[0037] 1. Hydraulic pump; 2. Control mechanism; 201. Limit rod; 202. Intercepting post; 203. Air hole; 204. Inclined block; 205. First spring; 206. Fixed frame; 207. Adjusting bolt; 208. Limit sliding rod; 209. Extrusion block; 210. Sealing gasket; 3. Ball valve; 4. Connection end; 5. Delivery pipe; 6. Pressure sensor; 7. First connecting pipe; 8. Second connecting pipe; 9. Stop valve; 10. Connector; 11. Air inlet; 12. Air pipe; 13. Expansion ring; 14. Sealing valve; 15. Installation groove; 16. Clamping post; 17. Second spring; 18. Clamping groove; 19. Rotating shaft; 20. Protective cover; 21. Limit plate; 22. Controller; 23. Installation plate; 24. Screw hole; 25. Placing groove; 26. Support column. Detailed Embodiment

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] Referring to Figure 2 、 Figure 3 and Figure 4 , an embodiment provided by the present invention: a hydraulic cylinder pressure measuring device, including a hydraulic pump 1, a ball valve 3 and a stop valve 9. Connecting ends 4 are communicated on the adjacent sides of the two ball valves 3. The adjacent ends of the two connecting ends 4 are communicated with a delivery pipe 5. The other ends of the two delivery pipes 5 are communicated with a pressure sensor 6. The ball valve 3 and the pressure sensor 6 are directly connected through the delivery pipe 5 to directly measure the pressure inside the ball valve and obtain a more accurate pressure value. A connecting pipe one 7 is communicated on the right side of the ball valve 3, and a connecting pipe two 8 is communicated on the left side of the stop valve 9. The connecting pipe one 7 and the connecting pipe two 8 are slidably connected through a connector 10. The connecting pipe one 7 and the connecting pipe two 8 are inserted and communicated with each other through the connector 10. An air inlet 11 is communicated at the top of the outer wall of the connector 10. The bottom ends of the air inlets 11 are all communicated with an air pipe 12. The other ends of the two air pipes 12 are both communicated with an expansion ring 13. The inner walls of the two expansion rings 13 are fixedly connected to the left and right ends of the outer wall of the connector 10. A sealing valve 14 is threadedly connected to the top end of the outer wall of the air inlet 11. Expansion rings 13 are fixedly installed at both ends of the outer wall of the connector 10. Gas is injected through the air inlet 11, so that the gas is injected into the expansion ring 13 through the air pipe 12, causing the expansion ring 13 to expand rapidly and fill the pipeline gap to ensure the airtightness between the pipelines, thereby improving the accuracy of pressure measurement. A plurality of installation grooves 15 are formed on the outer wall of the connector 10. A clamping column 16 is slidably connected inside each of the plurality of installation grooves 15. A second spring 17 is fixedly connected to the adjacent ends of the plurality of clamping columns 16. A plurality of clamping grooves 18 are formed on the outer walls of the connecting pipe one 7 and the connecting pipe two 8. The connecting pipe one 7 and the connecting pipe two 8 are provided with clamping grooves 18 on their outer walls. By squeezing the clamping column 16 and driving the clamping column 16 to insert into the clamping groove 18 through the second spring 17, the connection firmness between the pipelines is completed. A control mechanism 2 is arranged inside the stop valve 9;

[0040] Specifically, the hydraulic pump 1 serves as the power source. By operating efficiently, the hydraulic pump 1 provides a stable pressure output for the entire hydraulic system. The stability and reliability of its performance directly affect the accuracy of subsequent pressure measurements. The ball valve 3 enables rapid opening and closing, effectively reducing fluid resistance and improving the system's response speed. The globe valve 9 precisely controls the fluid through its internal control mechanism 2 to ensure that the fluid passage can be quickly cut off when needed, safeguarding the safety of the system. Between the ball valve 3 and the pressure sensor 6, a direct connection is achieved through the delivery pipe 5. This design method greatly shortens the pressure transmission path, reduces pressure loss and signal interference, enabling the pressure sensor 6 to more directly and accurately sense the pressure changes inside the ball valve. At the same time, to further improve the measurement accuracy, the device also adopts a highly sensitive pressure sensor 6 that can quickly respond to pressure changes and output accurate values. However, relying solely on a high-precision pressure sensor is not sufficient to ensure measurement accuracy. The airtightness between the pipes is also one of the key factors affecting measurement accuracy. For this reason, gas is injected through the air inlet 11. The gas enters the inside of the expansion ring 13 through the air pipe 12, causing it to expand rapidly and tightly fit into the pipe gap, thereby achieving effective sealing between the pipes. This design not only improves the airtightness of the device but also reduces pressure loss and errors caused by leakage. To ensure the firmness of the connection between the pipes, the device also opens multiple installation grooves 15 on the outer wall of the connector 10, and slidingly connects clamping posts 16 inside the installation grooves 15. These clamping posts 16 can automatically insert into the card slots 18 on the outer walls of the connecting pipe 1 and the connecting pipe 2 under the action of the second spring 17, thus achieving a firm connection between the pipes.

[0041] Refer to Figure 1 、 Figure 2 and Figure 5, the control mechanism 2 includes two limit rods 201. The left and right ends of the two limit rods 201 are fixedly connected to the inner wall of the stop valve 9. A throttle column 202 is slidably connected between the adjacent two limit rods 201. The throttle column 202 is slidably connected to both ends of the outer wall of the limit rod 201, thus ensuring the accuracy and stability of the throttle column 202 during movement; One end of the adjacent two throttle columns 202 is fixedly connected with an inclined block 204. Air holes 203 are provided on both the left and right sides inside the stop valve 9. A plurality of first springs 205 are fixedly connected to the outer walls of the two limit rods 201. A fixed frame 206 is fixedly connected to the top of the stop valve 9. An adjusting bolt 207 is threadedly connected inside the fixed frame 206. A limit sliding rod 208 is threadedly connected to the outer wall of the adjusting bolt 207. The bottom end of the limit sliding rod 208 penetrates through the top of the stop valve 9 and is fixedly connected with a pressing block 209. By rotating the adjusting bolt 207, the limit sliding rod 208 slides downward, thereby driving the pressing block 209 to be inserted between the two inclined blocks 204, driving the throttle columns 202 on both sides of the inclined block 204 to expand to both sides, and enabling the throttle columns 202 to be inserted into the air holes 203, thereby quickly completing the throttling and sealing treatment of the air holes 203; The control mechanism 2 further includes a sealing gasket 210, and the inner wall of the sealing gasket 210 is fixedly connected to the outer wall of the throttle column 202;

[0042] Specifically, the limit rods 201 are fixed to both sides of the inner wall of the stop valve 9. The two limit rods 201 are closely connected to the throttle column 202. The precise fit between the outer wall of the throttle column 202 and the limit rods 201 ensures its smoothness and accuracy during movement. In order to further improve the working efficiency and stability of the throttle column 202, an inclined block 204 is installed at its adjacent end. Once subjected to an external force, it can quickly respond and push the throttle column 202 to expand to both sides. The power source for all this is the combination of the fixed frame 206, the adjusting bolt 207, and the limit sliding rod 208 located at the top of the stop valve 9. By simply rotating the adjusting bolt 207, the limit sliding rod 208 is driven to slowly descend along its thread track until the pressing block 209 at its bottom end is firmly inserted between the two inclined blocks 204. After being squeezed, the inclined block 204 naturally pushes the throttle column 202 to move to both sides until it is tightly embedded in the air holes 203, completing a rapid and effective throttling and sealing operation. In order to ensure the best sealing effect between the throttle column 202 and the air holes 203, a sealing gasket 210 is installed on the outer wall of the throttle column 202. The sealing gasket 210 is made of a highly elastic and wear-resistant material, which can closely fit on the edge of the air holes 203, forming an indestructible barrier, effectively preventing fluid leakage under high pressure or high flow rate, not only improving the sealing performance of the entire control mechanism 2, but also extending the service life of the equipment and reducing the maintenance cost.

[0043] Refer to Figure 1 , Figure 2 and Figure 3, a rotating shaft 19 is rotatably connected to the top of the pressure sensor 6, a protective cover 20 is rotatably connected to the outer wall of the rotating shaft 19, a limiting plate 21 is slidably connected to the outer wall of the conveying pipe 5, the left side of the limiting plate 21 is fixedly connected to the right side of the hydraulic pump 1, a controller 22 is fixedly connected to the front side of the hydraulic pump 1, the controller 22 is electrically connected to the hydraulic pump 1, four corners at the bottom of the hydraulic pump 1 are fixedly connected with support columns 26, the bottom ends of the plurality of support columns 26 are fixedly connected with mounting plates 23, screw holes 24 are formed in the tops of the plurality of mounting plates 23, and a placement groove 25 is formed in the top of the hydraulic pump 1;

[0044] Specifically, a rotating shaft 19 is installed at the top of the pressure sensor 6. The rotating shaft 19 is the key to connecting the sensor and the protective cover 20. The rotating shaft 19 is made of high-strength alloy material to ensure stable rotational performance under various complex working conditions with pressure and vibration. The protective cover 20 can effectively prevent the sensor from being damaged by external dust, moisture and mechanical impact. The limiting plate 21 is not only fixedly connected to the right side of the hydraulic pump 1 to form a stable support structure, but also allows the conveying pipe to freely adjust its position within a certain range through its sliding connection to meet the requirements under different working conditions; the controller 22 is electrically connected to the hydraulic pump 1 to ensure fast signal transmission and accurate execution. The support columns 26 are made of high-strength steel and have excellent load-bearing capacity and anti-impact performance. They not only provide a stable support foundation for the hydraulic pump 1, but also are closely connected to the ground or other fixed structures through the mounting plates 23 at their bottoms. Screw holes 24 are formed in the tops of the mounting plates 23, which facilitates users to install and adjust according to actual needs.

[0045] Working principle: First, the ball valve 3 and the pressure sensor 6 are directly connected through the conveying pipe 5 to directly measure the pressure inside the ball valve and obtain more accurate pressure values. Gas is injected through the air inlet 11, and the gas is injected into the expansion ring 13 through the air pipe 12, causing the expansion ring 13 to expand rapidly and fill the gap between the pipelines to ensure the airtightness between the pipelines, thereby improving the accuracy of pressure measurement. By squeezing the clamping column 16 and driving the clamping column 16 to insert into the card slot 18 through the spring two 17, the connection firmness between the pipelines is completed; and by rotating the adjusting bolt 207, the limiting slide rod 208 slides downward, thereby driving the extrusion block 209 to be inserted between the two inclined blocks 204, driving the intercepting columns 202 on both sides of the inclined block 204 to expand to both sides, and enabling the intercepting columns 202 to be inserted into the air holes 203, so as to quickly complete the intercepting and sealing treatment of the air holes 203.

[0046] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A hydraulic cylinder pressure measuring device, comprising a hydraulic pump (1), a ball valve (3) and a stop valve (9), characterized in that: The adjacent sides of the two ball valves (3) are connected to a connecting end (4), the adjacent ends of the two connecting ends (4) are connected to a delivery pipe (5), the other ends of the two delivery pipes (5) are connected to a pressure sensor (6), the right side of the ball valve (3) is connected to a connecting pipe 1 (7), the left side of the stop valve (9) is connected to a connecting pipe 2 (8), the connecting pipe 1 (7) and the connecting pipe 2 (8) are slidably connected via a connecting piece (10), the top of the outer wall of the connecting piece (10) is connected to an air inlet (11), the bottom ends of the air inlet (11) are connected to an air pipe (12), and the two air pipes (12) are connected to the bottom ends of the two air pipes (12). The other ends are connected to expansion rings (13), the inner walls of the two expansion rings (13) are fixedly connected to the left and right ends of the outer wall of the connecting piece (10), the top end of the outer wall of the air inlet (11) is threadedly connected to a sealing valve (14), the outer wall of the connecting piece (10) is provided with a plurality of mounting grooves (15), the interiors of the plurality of mounting grooves (15) are slidably connected with clamping columns (16), the adjacent ends of the plurality of clamping columns (16) are fixedly connected with springs 2 (17), the outer walls of the connecting pipes 1 (7) and 2 (8) are provided with a plurality of clamping grooves (18), and the interior of the stop valve (9) is provided with a control mechanism (2).

2. A hydraulic cylinder pressure measuring device according to claim 1, characterized in that: The control mechanism (2) comprises two limit rods (201), the left and right ends of the two limit rods (201) are fixedly connected to the inner wall of the stop valve (9), the two limit rods (201) are slidably connected to a shutoff column (202) between adjacent ends, the adjacent ends of the two shutoff columns (202) are fixedly connected to an inclined block (204), the left and right sides of the inside of the stop valve (9) are provided with air holes (203), the outer walls of the two limit rods (201) are fixedly connected to a plurality of springs (205), the top of the stop valve (9) is fixedly connected to a fixing frame (206), the inside of the fixing frame (206) is threadedly connected to an adjusting bolt (207), the outer wall of the adjusting bolt (207) is threadedly connected to a limit slide rod (208), and the bottom end of the limit slide rod (208) passes through the top of the stop valve (9) and is fixedly connected to an extrusion block (209).

3. A hydraulic cylinder pressure measuring device according to claim 2, characterized in that: The control mechanism (2) further comprises a sealing gasket (210), wherein the inner wall of the sealing gasket (210) is fixedly connected to the outer wall of the intercepting column (202).

4. A hydraulic cylinder pressure measuring device according to claim 1, characterized in that: The top of the pressure sensor (6) is rotatably connected to a rotating shaft (19), and the outer wall of the rotating shaft (19) is rotatably connected to a protective cover (20).

5. A hydraulic cylinder pressure measuring device according to claim 1, characterized in that: The outer wall of the delivery pipe (5) is slidably connected to a limit plate (21), and the left side of the limit plate (21) is fixedly connected to the right side of the hydraulic pump (1).

6. A hydraulic cylinder pressure measuring device according to claim 1, characterized in that: A controller (22) is fixedly connected to the front side of the hydraulic pump (1), and the controller (22) is electrically connected to the hydraulic pump (1).

7. A hydraulic cylinder pressure measuring device according to claim 1, characterized in that: Support columns (26) are fixedly connected at the four corners of the bottom of the hydraulic pump (1), and the bottom ends of the plurality of support columns (26) are fixedly connected to a mounting plate (23).

8. A hydraulic cylinder pressure measuring device according to claim 7, characterized in that: The tops of the plurality of mounting plates (23) are each provided with a screw hole (24), and the top of the hydraulic pump (1) is provided with a placement groove (25).

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