A hydraulic press distance measuring device

Abstract

Nowadays, continuously formed materials such as steel pipes often need to be pressure-tested. However, in the existing hydraulic pressure system for pressure testing of formed pipes, the sealing head and the pressure test pipe are often not firmly connected and the seal is not complete. This problem is usually caused by the inaccurate position of the sealing head extended by the pressure test hydraulic system. Therefore, in order to solve the above technical problems, the present technical solution discloses a hydraulic press distance measuring device with a synchronous rotating wheel to accurately measure the extended position of the sealing head, thereby improving the sealing between the sealing head and the pipe being tested. The present technical solution plays a great role in improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of pressure testing of continuous forming materials, and in particular to a distance measuring device for testing a hydraulic press. Background Art

[0002] Today's production lines in the field of continuous molding materials have become mature, but after continuous materials such as steel pipes are molded, they sometimes need to be pressure tested. If the molded pipes are taken to the pressure testing machine alone for pressure testing, it will inevitably affect the production efficiency of the entire production line. If you want to not affect the production efficiency of the production line and ensure that the molded pipes can complete the pressure test according to the standard, then you must add a pressure testing device to the production line to meet the high-speed production of the production line. However, in the existing hydraulic system for pressure testing of molded pipes, the sealing head and the pressure test pipe are often not firmly connected and the seal is incomplete. This problem is usually caused by the inaccurate position of the sealing head extended from the pressure test water pressure system. Therefore, in order to solve the above technical problems and improve production efficiency, it is particularly important to develop a hydraulic press distance measuring device. Summary of the invention

[0003] The embodiment of the present invention provides a hydraulic press distance measuring device, which can more conveniently and quickly complete the docking of the pressure test hydraulic system with the tested pipe fitting, thereby improving the production efficiency of the entire production line.

[0004] On the one hand, a hydraulic press distance measuring device comprises a fixed frame (1a), a telescopic device (2a) and a hydraulic device (3a), wherein the telescopic device (2a) and the hydraulic device (3a) are both mounted on the fixed frame (1a), the telescopic device (2a) is responsible for completing docking and sealing with a material to be pressure-measured, and the hydraulic device (3a) is responsible for completing a pressure test on the material to be pressure-measured, and is characterized in that a distance measuring device (4a) is also provided on the fixed frame (1a), the distance measuring device (4a) is mounted on the fixed frame (1a) and is close to the telescopic device (2a), and the distance measuring device (4a) is also provided with a synchronous rotating wheel (4a1), the synchronous rotating wheel (4a1) and the telescopic device (2a) are in contact with each other, and when the telescopic device (2a) is extended or retracted, the synchronous rotating wheel (4a1) follows the movement of the telescopic device (2a) and rotates, thereby accurately controlling the telescopic distance of the telescopic device (2a) according to the rotation angle of the synchronous rotating wheel (4a1).

[0005] According to one aspect of an embodiment of the present invention, the distance measuring device (4a) is further provided with a pressure device (4a2), which is disposed at the end of the synchronous rotating wheel (4a1) and continuously applies pressure to the synchronous rotating wheel (4a1) to ensure that the synchronous rotating wheel (4a1) is always in contact with the telescopic device (2a), and ensure that the synchronous rotating wheel (4a1) always moves synchronously with the telescopic device (2a).

[0006] According to one aspect of an embodiment of the present invention, the pressurizing device (4a2) is further provided with a sliding rod (4a2a), a pressure spring (4a2b) and a mounting seat (4a2c); the mounting seat (4a2c) is provided with a sliding hole (4a2c1); the sliding rod (4a2a) is installed in the sliding hole (4a2c1) and can freely extend and retract therein; the synchronous rotating wheel (4a1) is installed at the end of the sliding rod (4a2a); the pressure spring (4a2b) is sheathed on the sliding rod (4a2a) and supported between the mounting seat (4a2c) and the synchronous rotating wheel (4a1).

[0007] According to one aspect of an embodiment of the present invention, the center line of the sliding hole (4a2c1) is perpendicular to the movement direction of the telescopic device (2a), so that the telescopic movement direction of the sliding rod (4a2a) is also perpendicular to the movement direction of the telescopic device (2a). The vertical setting reduces the measurement error caused by the up and down floating of the telescopic device (2a) when the synchronous rotating wheel (4a1) and the telescopic device (2a) move synchronously.

[0008] According to one aspect of an embodiment of the present invention, the distance measuring device (4a) is further provided with an electronic counting device (4a3), and the electronic counting device (4a3) is interconnected with the synchronous rotating wheel (4a1) and can rotate synchronously with the synchronous rotating wheel (4a1). Through the synchronous movement of the synchronous rotating wheel (4a1) and the telescopic device (2a), the electronic counting device (4a3) can record and calculate the rotation angle of the synchronous rotating wheel (4a1), thereby obtaining the telescopic distance of the telescopic device (2a) through a computer.

[0009] According to one aspect of an embodiment of the present invention, the distance measuring device (4a) is arranged above the telescopic device (2a), and the synchronous rotating wheel (4a1) in the distance measuring device (4a) can naturally fit on the upper surface of the telescopic device (2a) under gravity, thereby ensuring that the distance measuring device (4a) can still work normally when the pressure device (4a2) fails.

[0010] According to one aspect of an embodiment of the present invention, a sealing head (2a1) is further provided at the front section of the telescopic device (2a), the distance measuring device (4a) is provided at the rear end of the sealing head (2a1), the lower end of the sealing head (2a1) is assembled and connected to the water pressure device (3a), and the sealing head (2a1) can move synchronously with the telescopic device (2a).

[0011] According to one aspect of an embodiment of the present invention, the hydraulic device (3a) is further provided with a hydraulic telescopic rod (3a1), and the hydraulic telescopic rod (3a1) can be extended or retracted, thereby ensuring that the sealing head (2a1) provides a stable hydraulic pressure for the hydraulic system when following the telescopic movement of the telescopic device (2a). BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Features, advantages, and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0013] Description of the serial numbers: fixed frame (1a), telescopic device (2a), sealing head (2a1), hydraulic device (3a), hydraulic telescopic rod (3a1), distance measuring device (4a), synchronous rotating wheel (4a1), pressurizing device (4a2), sliding rod (4a2a), pressure spring (4a2b), mounting seat (4a2c), sliding hole (4a2c1), electronic counting device (4a3), tubular material (5).

[0014] Figure 1 It is a schematic diagram of the basic structure of an embodiment of the present invention.

[0015] Figure 2 It is a schematic diagram of the extended structure of the telescopic device (2a) according to an embodiment of the present invention.

[0016] Figure 3 It is a schematic diagram of the working state of the first embodiment of the present invention.

[0017] Figure 4 It is a schematic diagram of the working state of the second embodiment of the present invention.

[0018] Figure 5 2 is a schematic diagram of the working state of the third embodiment of the present invention.

[0019] Figure 6 2 is a schematic diagram of the working state of the fourth embodiment of the present invention.

[0020] Figure 7 2 is a schematic diagram of the working state of the fifth embodiment of the present invention.

[0021] Figure 8 It is a schematic diagram of the upward floating state of the fifth embodiment of the present invention.

[0022] Fig. 9 It is a schematic diagram of the downward floating state of the fifth embodiment of the present invention.

[0023] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0024] The following detailed description of the embodiments of the present invention is further described in detail in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention, that is, the present invention is not limited to the preferred embodiments described, and the scope of the present invention is defined by the claims.

[0025] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified, “vertical” and “parallel” do not just have absolute meanings in a mathematical sense, but can be understood as “approximately vertical” and “approximately parallel”.

[0026] Figure 1 It is a schematic diagram of the basic structure of an embodiment of the present invention.

[0027] Figure 2 It is a schematic diagram of the extended structure of the telescopic device (2a) according to an embodiment of the present invention.

[0028] according to Figure 1 and Figure 2 As shown, a hydraulic press distance measuring device comprises a fixed frame (1a) for supporting and positioning various components, a telescopic device (2a) capable of realizing a telescopic action, and a hydraulic device (3a) for providing a test pressure, wherein the telescopic device (2a) and the hydraulic device (3a) are both mounted on the fixed frame (1a), the telescopic device (2a) is arranged at the upper end of the fixed frame (1a), and the hydraulic device (3a) is arranged below the telescopic device (2a). The telescopic device (2a) is responsible for completing the docking and sealing with the material to be pressure-tested, and the hydraulic device (3a) is responsible for completing the pressure test of the material to be pressure-tested. The invention is characterized in that a distance measuring device (4a) is also provided on the fixed frame (1a) at the upper end of the telescopic device (2a), and the distance measuring device (4a) is installed on the fixed frame (1a) and close to the upper end plane of the telescopic device (2a). The distance measuring device (4a) is also provided with a synchronous rotating wheel (4a1), and the synchronous rotating wheel (4a1) is in contact with the upper end plane of the telescopic device (2a). The synchronous rotating wheel (4a1) is a cylindrical roller, and its cylindrical surface can be in contact with the upper end plane of the telescopic device (2a). When the telescopic device (2a) is telescoped, the synchronous rotating wheel (4a1) follows the sliding of the upper end plane of the telescopic device (2a) to generate rolling motion, thereby accurately controlling the telescopic distance of the telescopic device (2a) according to the rotation angle of the synchronous rotating wheel (4a1). The front section of the telescopic device (2a) is also provided with a sealing head (2a1), the distance measuring device (4a) is provided at the rear end of the sealing head (2a1), the lower end of the sealing head (2a1) is assembled and connected with the water pressure device (3a), and the sealing head (2a1) can move synchronously with the telescopic device (2a). The water pressure device (3a) is also provided with a water pressure telescopic rod (3a1), and the water pressure telescopic rod (3a1) can be extended or retracted, so as to ensure that the sealing head (2a1) provides a stable water pressure for the water pressure system when moving in a telescopic manner with the telescopic device (2a).

[0029] Figure 3 It is a schematic diagram of the working state of the first embodiment of the present invention.

[0030] according to Figure 3As shown, according to one aspect of the first embodiment of the present invention, the distance measuring device (4a) is further provided with a pressure device (4a2), and the pressure device (4a2) is further provided with a sliding rod (4a2a), a pressure spring (4a2b) and a mounting seat (4a2c), and the mounting seat (4a2c) is provided with a sliding hole (4a2c1), and the hole center line of the sliding hole (4a2c1) is perpendicular to the movement direction of the telescopic device (2a), so that the telescopic movement direction of the sliding rod (4a2a) is also perpendicular to the movement direction of the telescopic device (2a), and the vertical arrangement reduces the measurement error caused by the up and down floating of the telescopic device (2a) when the synchronous rotating wheel (4a1) and the telescopic device (2a) move synchronously. The sliding rod (4a2a) is a slender smooth round rod, and the sliding hole (4a2c1) is a slender smooth round hole. The sliding rod (4a2a) is installed in the sliding hole (4a2c1) and can be freely extended and retracted therein. The technical solution here can be directly replaced with a similar technical solution according to the technical means commonly used by technicians in this field. For example, the sliding rod (4a2a) can also be a slender rectangular smooth rod, and the sliding hole (4a2c1) is a slender rectangular smooth hole. The sliding rod (4a2a) is installed in the sliding hole (4a2c1) and can be freely extended and retracted therein. A fork frame is provided at the lower end of the sliding rod (4a2a), and the synchronous rotating wheel (4a1) is installed on the lower end of the sliding rod (4a2a) through the fork frame. The pressure spring (4a2b) is sleeved on the sliding rod (4a2a) and supported between the mounting seat (4a2c) and the synchronous rotating wheel (4a1). The pressure device (4a2) is provided at the upper end of the synchronous rotating wheel (4a1) and continuously applies pressure to the synchronous rotating wheel (4a1) to ensure that the synchronous rotating wheel (4a1) is always in contact with the telescopic device (2a) and ensure that the synchronous rotating wheel (4a1) always moves synchronously with the telescopic device (2a).

[0031] According to one aspect of the first embodiment of the present invention, the distance measuring device (4a) is further provided with an electronic counting device (4a3), and the electronic counting device (4a3) is interconnected with the synchronous rotating wheel (4a1) and can rotate synchronously with the synchronous rotating wheel (4a1). When the synchronous rotating wheel (4a1) contacts and cooperates with the telescopic device (2a), the telescopic device (2a) drives the synchronous rotating wheel (4a1) to rotate synchronously when the telescopic device (2a) is extended or retracted, and the electronic counting device (4a3) can record and calculate the rotation angle of the synchronous rotating wheel (4a1), thereby obtaining the telescopic distance of the telescopic device (2a) through a computer. When the telescopic device (2a) is extended to a suitable length, that is, the sealing head (2a1) at the front end of the telescopic device (2a) is extended to the position of the tubular material (5) and cooperates with the tubular material (5) to close the hydraulic device (3a) and the tubular material (5) into a sealed state, the electronic counting device (4a3) obtains the position information of the telescopic device (2a) and transmits the position information to the computer, and the computer issues an instruction to stop the telescopic device (2a) from extending. Conversely, when the sealing test is completed, the telescopic device (2a) retracts, that is, the telescopic device (2a) drives the sealing head (2a1) at the front end to move away from the tubular material (5). When the sealing head (2a1) successfully separates from the tubular material (5), the electronic counting device (4a3) obtains the position information of the telescopic device (2a) and transmits the position information to the computer, and the computer issues an instruction to stop the telescopic device (2a) from retracting, and the operation of the telescopic device (2a) is completed.

[0032] Figure 4 It is a schematic diagram of the working state of the second embodiment of the present invention.

[0033] according to Figure 4As shown, according to one aspect of the second embodiment of the present invention, the technical feature that distinguishes it from the first embodiment is that the lower end of the sliding rod (4a2a) is not provided with a fork frame, the lower end of the sliding rod (4a2a) is provided with a contact head, the synchronous rotating wheel (4a1) is arranged in a floating frame, one end of the floating frame is provided with a round hole, the lower end of the mounting seat (4a2c) is provided with a support hole, the end round hole of the floating frame is connected to the support hole through a rotating shaft, and the floating frame can swing around the support hole. The synchronous rotating wheel (4a1) is arranged in the floating frame and presses down on the surface of the telescopic device (2a), so that the synchronous rotating wheel (4a1) can contact the surface of the telescopic device (2a), the contact head at the lower end of the sliding rod (4a2a) is pressed down on the upper end of the floating frame, and the pressure spring (4a2b) is sheathed on the sliding rod (4a2a) and supported between the mounting seat (4a2c) and the floating frame. The pressure device (4a2) is disposed at the upper end of the synchronous rotating wheel (4a1), and continuously applies pressure to the synchronous rotating wheel (4a1) to ensure that the synchronous rotating wheel (4a1) is always in contact with the telescopic device (2a), and ensure that the synchronous rotating wheel (4a1) always moves synchronously with the telescopic device (2a).

[0034] According to one aspect of the second embodiment of the present invention, the distance measuring device (4a) is also provided with an electronic counting device (4a3), and the electronic counting device (4a3) is connected to the synchronous rotating wheel (4a1) and can rotate synchronously with the synchronous rotating wheel (4a1). The electronic counting device (4a3) can record and calculate the rotation angle of the synchronous rotating wheel (4a1), thereby obtaining the telescopic distance of the telescopic device (2a) through a computer. When the telescopic device (2a) is extended to a suitable length, that is, the sealing head (2a1) at the front end of the telescopic device (2a) extends to the position of the tubular material (5) and cooperates with the tubular material (5) to close the hydraulic device (3a) and the tubular material (5) into a sealed state, the electronic counting device (4a3) obtains the position information of the telescopic device (2a) and transmits the position information to the computer, and the computer issues an instruction to stop the telescopic device (2a) from extending. On the contrary, when the sealing test is finished, the telescopic device (2a) retracts, that is, the telescopic device (2a) drives the sealing head (2a1) at the front end to move away from the tubular material (5). When the sealing head (2a1) successfully separates from the tubular material (5), the electronic counting device (4a3) obtains the position information of the telescopic device (2a) and transmits the position information to the computer. The computer issues a command to stop the telescopic device (2a) from retracting, and the operation of the telescopic device (2a) is finished.

[0035] Figure 5 2 is a schematic diagram of the working state of the third embodiment of the present invention.

[0036] according to Figure 5As shown, according to one aspect of the third embodiment of the present invention, the synchronous rotating wheel (4a1) is arranged in a floating frame, a circular hole is provided at one end of the floating frame, a supporting hole is provided at the lower end of the mounting seat (4a2c), the circular hole at the end of the floating frame is connected to the supporting hole via a rotating shaft, and the floating frame can swing around the supporting hole. The synchronous rotating wheel (4a1) is arranged in the floating frame and presses down on the surface of the telescopic device (2a), so that the synchronous rotating wheel (4a1) can contact the surface of the telescopic device (2a). The technical feature that distinguishes it from the second embodiment is that the pressure device (4a2) is a pressure spring (4a2b), and the pressure spring (4a2b) is a spring sheet that can provide continuous pressure downward. One end of the pressure spring (4a2b) is fixed on the mounting seat (4a2c), and the other end is pressed down on the upper end of the floating frame, and continuously applies pressure to the synchronous rotating wheel (4a1) to ensure that the synchronous rotating wheel (4a1) is always in contact with the telescopic device (2a), and to ensure that the synchronous rotating wheel (4a1) always moves synchronously with the telescopic device (2a).

[0037] According to one aspect of the third embodiment of the present invention, the distance measuring device (4a) is also provided with an electronic counting device (4a3), and the electronic counting device (4a3) is connected to the synchronous rotating wheel (4a1) and can rotate synchronously with the synchronous rotating wheel (4a1). The electronic counting device (4a3) can record and calculate the rotation angle of the synchronous rotating wheel (4a1), thereby obtaining the telescopic distance of the telescopic device (2a) through a computer. When the telescopic device (2a) is extended to a suitable length, that is, the sealing head (2a1) at the front end of the telescopic device (2a) extends to the position of the tubular material (5) and cooperates with the tubular material (5) to close the hydraulic device (3a) and the tubular material (5) into a sealed state, the electronic counting device (4a3) obtains the position information of the telescopic device (2a) and transmits the position information to the computer, and the computer issues an instruction to stop the telescopic device (2a) from extending. On the contrary, when the sealing test is finished, the telescopic device (2a) retracts, that is, the telescopic device (2a) drives the sealing head (2a1) at the front end to move away from the tubular material (5). When the sealing head (2a1) successfully separates from the tubular material (5), the electronic counting device (4a3) obtains the position information of the telescopic device (2a) and transmits the position information to the computer. The computer issues a command to stop the telescopic device (2a) from retracting, and the operation of the telescopic device (2a) is finished.

[0038] Figure 6 2 is a schematic diagram of the working state of the fourth embodiment of the present invention.

[0039] according to Figure 6As shown, according to one aspect of the fourth embodiment of the present invention, a parallelogram linkage mechanism is provided between the synchronous rotating wheel (4a1) and the mounting seat (4a2c), and the pressure spring (4a2b) is arranged at two mutually opposite hinge points of the parallelogram linkage mechanism, which can pull the parallelogram structure to realize the linkage movement so that the synchronous rotating wheel (4a1) can be pressed downward toward the telescopic device (2a), and pressure is continuously applied to the synchronous rotating wheel (4a1) to ensure that the synchronous rotating wheel (4a1) is always in contact with the telescopic device (2a), and to ensure that the synchronous rotating wheel (4a1) always moves synchronously with the telescopic device (2a).

[0040] Figure 7 2 is a schematic diagram of the working state of the fifth embodiment of the present invention.

[0041] Figure 8 It is a schematic diagram of the upward floating state of the fifth embodiment of the present invention.

[0042] Fig. 9 It is a schematic diagram of the downward floating state of the fifth embodiment of the present invention.

[0043] according to Figure 7 , Figure 8 and Fig. 9 As shown, according to one aspect of the fifth embodiment of the present invention, the synchronous rotating wheel (4a1) is arranged on a floating frame, and the synchronous rotating wheel (4a1) can be arranged in plurality, and the plurality of synchronous rotating wheels (4a1) are all fitted on the telescopic device (2a) and can form elastic forces tightly fitting the telescopic device (2a) with each other, and the floating frame continuously applies pressure to the synchronous rotating wheel (4a1) to ensure that the synchronous rotating wheel (4a1) is always fitted with the telescopic device (2a), and to ensure that the synchronous rotating wheel (4a1) always moves synchronously with the telescopic device (2a).

[0044] According to one aspect of the fourth embodiment and the fifth embodiment of the present invention, the distance measuring device (4a) is also provided with an electronic counting device (4a3), and the electronic counting device (4a3) is connected to the synchronous rotating wheel (4a1) and can rotate synchronously with the synchronous rotating wheel (4a1). The electronic counting device (4a3) can record and calculate the rotation angle of the synchronous rotating wheel (4a1), thereby obtaining the telescopic distance of the telescopic device (2a) through a computer. When the telescopic device (2a) is extended to a suitable length, that is, the sealing head (2a1) at the front end of the telescopic device (2a) extends to the position of the tubular material (5) and cooperates with the tubular material (5) to close the hydraulic device (3a) and the tubular material (5) into a sealed state, the electronic counting device (4a3) obtains the position information of the telescopic device (2a) and transmits the position information to the computer, and the computer issues an instruction to stop the telescopic device (2a) from extending. On the contrary, when the sealing test is finished, the telescopic device (2a) retracts, that is, the telescopic device (2a) drives the sealing head (2a1) at the front end to move away from the tubular material (5). When the sealing head (2a1) successfully separates from the tubular material (5), the electronic counting device (4a3) obtains the position information of the telescopic device (2a) and transmits the position information to the computer. The computer issues a command to stop the telescopic device (2a) from retracting, and the operation of the telescopic device (2a) is finished.

[0045] It should be understood that the description of the specific embodiments of the present invention is exemplary and should not be interpreted as an improper limitation on the scope of protection of the present invention. The scope of protection of the present invention is defined by its claims and covers all embodiments and obvious equivalent variations falling within its scope.

Claims

1. A hydraulic press distance measuring device, comprising a fixed frame (1a), a telescopic device (2a) and a hydraulic device (3a), wherein the telescopic device (2a) and the hydraulic device (3a) are both mounted on the fixed frame (1a), the telescopic device (2a) is responsible for completing docking and sealing with a material to be pressure-measured, and the hydraulic device (3a) is responsible for completing a pressure test on the material to be pressure-measured, characterized in that The fixed frame (1a) is also provided with a distance measuring device (4a), the distance measuring device (4a) being mounted on the fixed frame (1a) and close to the telescopic device (2a), the distance measuring device (4a) being also provided with a synchronous rotating wheel (4a1), the synchronous rotating wheel (4a1) being in contact with the telescopic device (2a), and when the telescopic device (2a) is telescoped, the synchronous rotating wheel (4a1) follows the movement of the telescopic device (2a) and rotates, thereby accurately controlling the telescopic distance of the telescopic device (2a) according to the rotation angle of the synchronous rotating wheel (4a1).

2. A hydraulic press distance measuring device according to claim 1, characterized in that The distance measuring device (4a) is further provided with a pressure device (4a2), which is arranged at the end of the synchronous rotating wheel (4a1) and continuously applies pressure to the synchronous rotating wheel (4a1) to ensure that the synchronous rotating wheel (4a1) is always in contact with the telescopic device (2a), and ensure that the synchronous rotating wheel (4a1) always moves synchronously with the telescopic device (2a).

3. A hydraulic press distance measuring device according to claim 2, characterized in that The pressurizing device (4a2) is further provided with a sliding rod (4a2a), a pressure spring (4a2b) and a mounting seat (4a2c); the mounting seat (4a2c) is provided with a sliding hole (4a2c1); the sliding rod (4a2a) is mounted in the sliding hole (4a2c1) and can freely extend and retract therein; the synchronous rotating wheel (4a1) is mounted on the end of the sliding rod (4a2a); the pressure spring (4a2b) is sheathed on the sliding rod (4a2a) and supported between the mounting seat (4a2c) and the synchronous rotating wheel (4a1).

4. A hydraulic press distance measuring device according to claim 3, characterized in that The center line of the sliding hole (4a2c1) is perpendicular to the movement direction of the telescopic device (2a), so that the telescopic movement direction of the sliding rod (4a2a) is also perpendicular to the movement direction of the telescopic device (2a). The vertical arrangement reduces the measurement error caused by the up and down floating of the telescopic device (2a) when the synchronous rotating wheel (4a1) and the telescopic device (2a) move synchronously.

5. A hydraulic press distance measuring device according to claim 4, characterized in that The distance measuring device (4a) is also provided with an electronic counting device (4a3). The electronic counting device (4a3) is interconnected with the synchronous rotating wheel (4a1) and can rotate synchronously with the synchronous rotating wheel (4a1). Through the synchronous movement of the synchronous rotating wheel (4a1) and the telescopic device (2a), the electronic counting device (4a3) can record and calculate the rotation angle of the synchronous rotating wheel (4a1), thereby obtaining the telescopic distance of the telescopic device (2a) through a computer.

6. A hydraulic press distance measuring device according to any one of claims 1 to 5, characterized in that The distance measuring device (4a) is arranged above the telescopic device (2a), and the synchronous rotating wheel (4a1) in the distance measuring device (4a) can naturally fit on the upper surface of the telescopic device (2a) under gravity, thereby ensuring that the distance measuring device (4a) can still work normally when the pressure device (4a2) fails.

7. A hydraulic press distance measuring device according to any one of claims 1 to 5, characterized in that The front section of the telescopic device (2a) is also provided with a sealing head (2a1); the distance measuring device (4a) is provided at the rear end of the sealing head (2a1); the lower end of the sealing head (2a1) is assembled and connected to the water pressure device (3a); and the sealing head (2a1) can move synchronously with the telescopic device (2a).

8. A hydraulic press distance measuring device according to any one of claims 1 to 5, characterized in that The hydraulic device (3a) is also provided with a hydraulic telescopic rod (3a1), which can be extended or retracted, thereby ensuring that the sealing head (2a1) provides a stable hydraulic pressure for the hydraulic system when following the telescopic movement of the telescopic device (2a).

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