A high pressure traction testing device

Abstract

The utility model discloses a high pressure traction test device adopts the combination of guide rail and double traction block, and the two ends of hydraulic dilator form independent reliable positioning respectively, and through the single side movable traction block cooperation power assembly realizes the setting of multiple opening and closing angles, and the pressure sensor of the other side fixed traction block position obtains the dilatant traction force data, realizes high measurement accuracy and wide measurement range.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic tool technology and relates to a high-pressure traction testing device. Background Technology

[0002] Hydraulic spreaders are specialized hydraulic tools used for emergency rescue. Reliable and stable expansion and pulling performance is crucial, making performance testing necessary before they leave the factory. Currently, there is a lack of expansion and pulling testing equipment for hydraulic spreaders on the market, and the two jaws of hydraulic spreaders lack reliable fixing structures, resulting in inaccurate measurement of the force of jaw expansion and pulling. Therefore, it is even more difficult to conduct performance testing of hydraulic spreaders at multiple opening and closing angles. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides a high-pressure traction testing device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A high-pressure traction testing device includes a base, a guide rail, and a traction block. The guide rail is disposed on the base. The traction block is provided with a locking slot for fixing to the end of an electro-hydraulic expander. The traction block includes a fixed traction block and a movable traction block. The fixed traction block is fixedly disposed on the base and is provided with a pressure sensor. The movable traction block is slidably disposed on the guide rail. The base is provided with a power assembly for the movable traction block to move along the guide rail.

[0006] Furthermore, the traction block includes a slider, the bottom of which is provided with a groove for sliding engagement with the guide rail, and the bayonet is provided in the middle of the slider.

[0007] Furthermore, it also includes a guide post, which is fixedly connected to the slider and passes through the bayonet.

[0008] Furthermore, the guide post and the slider are detachably connected.

[0009] Furthermore, a pressure display is provided on the base, and the pressure display is electrically connected to the pressure sensor.

[0010] Furthermore, the powertrain includes a cylinder assembly, a piston assembly, and a reversing valve. The cylinder assembly includes a cylinder barrel and a front cylinder cover and a rear cylinder cover respectively disposed at both ends of the cylinder barrel. The front cylinder cover is fixedly connected to the base. The piston assembly includes a piston seat and a piston rod passing through the cylinder barrel. One end of the piston rod is connected to the movable traction block. The reversing valve is connected to the cylinder assembly for setting the direction of movement of the piston assembly.

[0011] Furthermore, the reversing valve includes a valve seat, which is fixedly connected to the cylinder barrel. One end of the reversing valve is provided with an oil pipe assembly for connecting to an external pressure pump, and the other end is provided with an oil passage pipe, the two ends of which are respectively connected to the two ends of the cylinder barrel.

[0012] Furthermore, O-rings and PTFE retaining rings are provided between the cylinder barrel and the front cover of the cylinder, and between the cylinder barrel and the rear cover of the cylinder.

[0013] Furthermore, a lip seal and a dust seal are provided between the piston rod and the front cover of the cylinder.

[0014] Furthermore, a Gladley seal ring and a support ring are respectively provided on the outer periphery of the piston seat.

[0015] In summary, the advantages of this utility model are as follows:

[0016] This utility model adopts a combination of guide rail and double traction blocks to form independent and reliable positioning for the two ends of the hydraulic expander. Multiple opening and closing angles can be set by the movable traction block on one side in conjunction with the power assembly. The pressure sensor with the fixed position of the traction block on the other side obtains the expansion traction force data, achieving high measurement accuracy and a wide measurement range. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the testing device of this utility model.

[0018] Figure 2 for Figure 1 A schematic diagram of the side view of the structure.

[0019] Figure 3 for Figure 1 A magnified structural diagram of A in the diagram.

[0020] Figure 4 This is a cross-sectional structural diagram of the powertrain section.

[0021] Figure 5 This is a cross-sectional structural diagram of the reversing valve section.

[0022] The diagram identifies the following: 1. Base; 11. Guide rail; 12. Pressure sensor; 13. Pressure display; 21. Fixed traction block; 211. Slider; 212. Bayonet; 213. Guide post; 22. Movable traction block; 3. Cylinder barrel; 31. Cylinder front cover; 311. Lip seal; 312. Dust seal; 32. Cylinder rear cover; 33. Piston rod; 331. Piston seat; 332. Glyd seal; 333. Support ring; 34. Oil pipe; 35. Directional valve; 351. Valve seat; 352. Pressure holding valve; 353. Pressure regulating valve; 36. Oil pipe assembly. Detailed Implementation

[0023] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0024] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0025] In this embodiment of the invention, all directional indicators (such as up, down, left, right, front, back, horizontal, vertical, etc.) are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0026] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of this utility model may actually be an approximate parallel relationship, and the perpendicular relationship may actually be an approximate perpendicular relationship.

[0027] This utility model provides a high-pressure traction testing device for performance testing of electro-hydraulic expanders, which can accurately and conveniently test the traction force of electro-hydraulic expanders at different opening distances.

[0028] Specifically, refer to Figure 1The traction test device includes a base 1 assembly and a power assembly. The base 1 assembly includes a base 1, a traction block, and a guide rail 11. The base 1 is set on an installation plane such as an operating table, serving as the bottom support of the overall structure. The guide rail 11 is fixedly installed on the base 1 along a set straight line direction. The traction block is slidably set on the guide rail 11, enabling it to translate along the straight line direction of the guide rail 11.

[0029] Reference Figure 3 The traction block includes a slider 211 and a guide post 213. The bottom of the slider 211 is provided with a groove for sliding engagement with the guide rail 11. The middle of the slider 211 is provided with a slot 212 for the tip of the electro-hydraulic expander to pass through. The guide post 213 is detachably installed on the slider 211 and is fixed to the slider 211 during installation. The guide post 213 passes through the slot 212. The tip of the electro-hydraulic expander is provided with a notch or through hole for engaging with the guide post 213. When the tip of the expander enters the slot 212, the guide post 213 passes through the notch or through hole, further forming a snap-fit, ensuring a stable snap-fit ​​engagement between the tip of the expander and the slider 211.

[0030] Furthermore, the guide post 213 and the slider 211 are fixedly connected by a threaded connection.

[0031] In this preferred embodiment, two traction blocks are provided, including a fixed traction block 21 and a movable traction block 22. The fixed traction block 21 is located at one end of the straight direction of the guide rail 11 and is fixedly installed on the base 1 by fastening bolts to fix its position. A pressure sensor 12 is provided between the fixed traction block 21 and the base 1. A pressure display 13 connected to the pressure sensor 12 is provided on the base 1. When the fixed traction block 21 is compressed or stretched, the pressure sensor 12 can generate corresponding pressure data and display it on the pressure display 13.

[0032] Reference Figure 2 and Figure 4 The powertrain is located on the base 1 near the movable traction block 22. The powertrain includes a cylinder assembly, a piston assembly, and a reversing valve 35. The cylinder assembly includes a cylinder barrel 3 and a cylinder front cover 31 and a cylinder rear cover 32 located at both ends of the cylinder barrel 3. The cylinder barrel 3 forms a cavity for accommodating hydraulic oil. The cylinder front cover 31 is fixedly connected to the base 1. The piston assembly is located inside the cylinder barrel 3 and includes a piston rod 33. The front end of the piston rod 33 passes through the cylinder front cover 31 and the base 1 and is fixedly connected to the movable traction block 22. The piston rod 33 is hydraulically driven to directly push the movable traction block 22 to move horizontally on the guide rail 11.

[0033] Preferably, the cylinder barrel 3 and the cylinder front cover 31, and the cylinder barrel 3 and the cylinder rear cover 32 are each provided with a set of O-rings and PTFE retaining rings to form mechanical seals at both ends of the cylinder barrel 3 to prevent oil leakage.

[0034] Preferably, a lip seal 311 and a dust seal 312 are provided between the piston rod 33 and the cylinder front cover 31 to enhance the smoothness of sliding and the sealing effect between the piston rod 33 and the cylinder front cover 31.

[0035] A piston seat 331 is connected to the rear end of the piston rod 33. The outer peripheral wall of the piston seat 331 fits tightly against the inner peripheral wall of the cavity. The piston seat 331 divides the cavity into two chambers, left and right. An oil pipe 34 is provided outside the cylinder 3, which is connected to the left and right chambers respectively. An external pressure pump is also included. The external pressure pump is connected to the cavity through a pipeline to supply pressure into the cavity. A reversing valve 35 is provided on the oil pipe 34. The reversing valve 35 is used to switch the pressure supply from the external pressure pump to the left or right chamber, thereby switching the direction of piston rod 33 movement.

[0036] Preferably, the outer periphery of the piston seat 331 is provided with a Gladwell sealing ring 332 and a bakelite support ring 333 to enhance the smoothness of sliding and the sealing effect between the piston and the cavity.

[0037] Reference Figure 5 The directional valve 35 is fixedly installed on the cylinder 3 via the valve seat 351. It is also equipped with a pressure holding valve 352 and a pressure regulating valve 353 to further improve the operational stability and operability of the directional valve 35. The directional valve 35 is connected to an external pressure pump via the oil pipe assembly 36. The oil pipe assembly 36 includes an oil inlet pipe, an oil outlet pipe, an aluminum handle, a protective sleeve, an oil pipe connector, and a conversion male connector.

[0038] When performing performance tests on the electro-hydraulic expander, the movable traction block 22 is moved to the designated test position by driving the piston rod 33, so that the movable traction block 22 and the fixed traction block 21 form a set test distance. At this time, the clamp tip of the electro-hydraulic expander is fixed on the fixed traction block 21 and the movable traction block 22 respectively, and the electro-hydraulic expander can be driven to work for testing. The test results are obtained through the pressure display 13. By flexibly setting the position of the movable traction block 22, the traction force of the electro-hydraulic expander at different opening and closing angles can be tested.

[0039] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort should fall within the protection scope of this utility model.

Claims

1. A high-pressure traction testing device, characterized in that, The device includes a base (1), a guide rail (11), and a traction block. The guide rail (11) is disposed on the base (1). The traction block is provided with a bayonet (212) for fixing to the end of an electro-hydraulic expander. The traction block includes a fixed traction block (21) and a movable traction block (22). The fixed traction block (21) is fixedly disposed on the base (1) and is provided with a pressure sensor (12). The movable traction block (22) is slidably disposed on the guide rail (11). The base (1) is provided with a power assembly for the movable traction block (22) to move along the guide rail (11).

2. The high-pressure traction testing device according to claim 1, characterized in that, The traction block includes a slider (211), the bottom of which is provided with a groove for sliding engagement with the guide rail (11), and the bayonet (212) is provided in the middle of the slider (211).

3. The high-pressure traction testing device according to claim 2, characterized in that, It also includes a guide post (213), which is fixedly connected to the slider (211) and passes through the bayonet (212).

4. The high-pressure traction testing device according to claim 3, characterized in that, The guide post (213) is detachably connected to the slider (211).

5. A high-pressure traction testing device according to claim 1, characterized in that, A pressure display (13) is provided on the base (1), and the pressure display (13) is electrically connected to the pressure sensor (12).

6. The high-pressure traction testing device according to claim 1, characterized in that, The powertrain includes a cylinder assembly, a piston assembly, and a reversing valve (35). The cylinder assembly includes a cylinder barrel (3) and a cylinder front cover (31) and a cylinder rear cover (32) respectively disposed at both ends of the cylinder barrel (3). The cylinder front cover (31) is fixedly connected to the base (1). The piston assembly includes a piston seat (331) and a piston rod (33) passing through the cylinder barrel (3). One end of the piston rod (33) is connected to the movable traction block (22). The reversing valve (35) is connected to the cylinder assembly to set the direction of movement of the piston assembly.

7. A high-pressure traction testing device according to claim 6, characterized in that, The reversing valve (35) includes a valve seat (351), which is fixedly connected to the cylinder (3). One end of the reversing valve (35) is provided with an oil pipe assembly (36) for connecting to an external pressure pump, and the other end is provided with an oil pipe (34). The two ends of the oil pipe (34) are respectively connected to the two ends of the cylinder (3).

8. A high-pressure traction testing device according to claim 6, characterized in that, O-rings and PTFE retaining rings are provided between the cylinder barrel (3) and the cylinder front cover (31), and between the cylinder barrel (3) and the cylinder rear cover (32).

9. A high-pressure traction testing device according to claim 6, characterized in that, A lip seal (311) and a dust seal (312) are provided between the piston rod (33) and the cylinder front cover (31).

10. A high-pressure traction testing device according to claim 6, characterized in that, The piston seat (331) is provided with a Gladley seal ring (332) and a support ring (333) on its outer periphery.

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