Hydraulic pump device

Abstract

The utility model provides a hydraulic pump device which comprises a power source and a hydraulic pump, and the power source is connected with the input end of the hydraulic pump and used for driving the hydraulic pump to pump hydraulic oil. The pressure maintaining device comprises a body structure, a first oil inlet pipeline is arranged on the body structure, one end of the first oil inlet pipeline is communicated with the output end of the hydraulic pump, and the other end of the first oil inlet pipeline is used for being connected with an oil way of a hydraulic clamp; the pressure maintaining device further comprises a one-way conduction assembly, and at least part of the one-way conduction assembly is arranged in the first oil inlet pipeline and used for conducting in the first oil inlet pipeline in a one-way mode so that high-pressure oil can be conveyed towards the hydraulic clamp, and backflow can be prevented. According to the hydraulic pump device provided by the utility model, the pressure maintaining device is arranged, so that the crimping force can be continuously applied to the crimping part within the specified time, and the cable can be ensured to have enough pressure maintaining time, so that the crimping part of the cable is deformed, and a good crimping process is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical installation tools, in particular to a hydraulic pump device. Background Art

[0002] Currently, during the process of connecting electrical connections, such as cables, a large force usually needs to be applied at the cable connection point to ensure the connection strength of the cable and the safety of subsequent power transmission.

[0003] Among all types of crimping tools, hydraulic drive can provide greater crimping force, which is very convenient for ensuring the crimping quality of cables. However, with the development of technology, the requirements for crimping process are getting higher and higher. How to make the crimping of cables more firmly is a practical problem that needs to be solved urgently by technicians in the industry. Utility Model Content

[0004] The purpose of the present invention is to provide a hydraulic pump device to solve the technical problem of how to crimp cables more firmly. The various technical effects that can be produced by the preferred technical solution among the various technical solutions provided by the present invention are described in detail below.

[0005] To achieve the above objectives, the present invention provides a hydraulic pump device, comprising:

[0006] a power source and a hydraulic pump, wherein the power source is connected to an input end of the hydraulic pump and is used to drive the hydraulic pump to pump hydraulic oil;

[0007] A pressure-maintaining device, comprising a main body structure, provided with a first oil inlet pipe, one end of the first oil inlet pipe being connected to the output end of the hydraulic pump, and the other end being connected to the oil circuit of the hydraulic pliers;

[0008] The pressure maintaining device further includes a one-way conducting component, at least part of which is arranged in the first oil inlet pipeline, for one-way conducting in the first oil inlet pipeline to transport high-pressure oil toward the hydraulic pliers and prevent backflow.

[0009] The hydraulic pump device of the utility model is provided with a pressure holding device, which can continuously apply the crimping force to the crimping point within a specified time, thereby ensuring that the cable has a sufficient pressure holding time, causing the crimping point of the cable to deform, thereby ensuring a good crimping process.

[0010] In some embodiments of the present invention, the hydraulic pump device further includes a pressure relief assembly, at least a portion of which extends into the first oil inlet pipe and is spaced apart from the one-way conducting assembly;

[0011] Part of the pressure relief component is capable of sliding along the first oil inlet pipe toward one end of the one-way conducting component and applying a force to the one-way conducting component.

[0012] In some embodiments of the present invention, the pressure relief assembly is provided with a push rod, at least part of which is arranged in the first oil inlet pipe to push the one-way conducting assembly to move along the first oil inlet pipe, and the first oil inlet pipe is reversely conducted to realize the reflux of the high-pressure oil.

[0013] In some embodiments of the present invention, a second oil inlet pipe is further provided on the main body structure, a through opening is provided between the second oil inlet pipe and the first oil inlet pipe, and the through opening is located on a side of the push rod away from the one-way conducting component.

[0014] The second oil inlet pipeline is used to communicate with the oil inlet pipeline of the hydraulic pliers, or the second oil inlet pipeline is used as the oil return pipeline of the hydraulic pliers;

[0015] Wherein, the outer peripheral surface of the partial rod section of the push rod is matched with the inner wall of the first oil inlet pipe in a dynamic seal.

[0016] In some embodiments of the present invention, the pressure relief assembly includes a pressure relief solenoid valve, which is provided with a first driving end, and the first driving end is connected to one end of the push rod to drive the push rod to move in the first oil inlet pipe.

[0017] In some embodiments of the present invention, the hydraulic pump device also includes a first remote control device, which is provided with a first signal transmitting unit and a first signal receiving unit. The first signal receiving unit is electrically connected to the pressure relief solenoid valve to control the connection and disconnection of the drive circuit of the pressure relief solenoid valve.

[0018] In some embodiments of the present invention, the pressure relief assembly further includes a travel switch, the travel switch including a second driving end and a conductive component, the second driving end being connected to a portion of the conductive component, and having a driving stroke at the second driving end to control the connection and disconnection of the conductive component;

[0019] The conductive component is also connected to the control circuit of the hydraulic pump device to realize the connection and disconnection of the control circuit;

[0020] The second driving end is connected to the pressure relief assembly. The pressure relief assembly can apply a driving force to the second driving end to perform the driving stroke while applying a force to the one-way conducting assembly.

[0021] In some embodiments of the present invention, the hydraulic pump device further includes a swing rod, the swing rod having a first rod segment and a second rod segment, the first rod segment being connected to the pressure relief assembly to drive the partial pressure relief assembly to slide in the first oil inlet pipe;

[0022] The second rod segment is connected to the second driving end to drive the second driving end to perform the driving stroke.

[0023] In some embodiments of the present invention, the pressure-maintaining device and the travel switch are respectively located on both sides of the swing rod, or the pressure-maintaining device and the travel switch are located on the same side of the swing rod.

[0024] In some embodiments of the present invention, the hydraulic pump device also includes a solenoid valve group, the drive circuit of the solenoid valve is connected to the control circuit, and the drive circuit is connected to the conductive component, and the connection and disconnection of the drive circuit are controlled by the conductive component connected to the second drive end.

[0025] In some embodiments of the present invention, when the swing arm swings, the first rod segment drives the one-way conduction component via the push rod of the pressure relief component, and before the first oil inlet pipeline is reversely conducted, the second rod segment drives the second driving end to perform the driving stroke, and the control circuit or the driving circuit is disconnected; or

[0026] When the swing arm swings, the first rod segment drives the one-way conduction component through the push rod of the pressure relief component. After the first oil inlet pipeline is reversely conducted, the second rod segment drives the second driving end to perform the driving stroke, and the control circuit or the driving circuit is disconnected.

[0027] In some embodiments of the present invention, the travel switch is provided with a driving module, and the driving module is used to drive the second driving end to perform the driving stroke;

[0028] The hydraulic pump device further includes a second remote control device, which is provided with a second signal transmitting unit and a second signal receiving unit. The second signal receiving unit is electrically connected to the driving module to control the second driving end to execute the driving stroke.

[0029] In some embodiments of the present invention, a detection pipeline is further provided on the main body structure, and the detection pipeline is connected to a portion of the first oil inlet pipeline and can be connected to the circuit of the hydraulic pliers;

[0030] The hydraulic pump device further comprises a pressure gauge, the inlet end of which is connected to the detection pipeline.

[0031] In some embodiments of the present invention, the hydraulic pump device further includes a pressure sensor, a display unit, and a recording unit. The detection end of the pressure sensor is provided in the boost oil circuit of the hydraulic pump.

[0032] The display unit is electrically connected to the pressure sensor and is used to display the pressure detection value of the detection end;

[0033] The recording unit is electrically connected to the pressure sensor. When the pressure detection value rises to a preset value, the recording unit records the pressure rise once and displays it on the display unit.

[0034] In some embodiments of the present invention, the hydraulic pump device further includes a remote monitoring device, the remote monitoring device including a signal sending module and a signal receiving module, the signal sending module is electrically connected to the pressure sensor and is used to obtain the pressure value of the detection end, and the signal receiving module sends a signal;

[0035] The signal receiving module is used to receive the signal sent by the signal generating module and form a pressure curve with the pressure value. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 This is a schematic structural diagram of a hydraulic pump device according to an embodiment of the present utility model;

[0038] Figure 2 An exploded view of a hydraulic pump device according to an embodiment of the present invention;

[0039] Figure 3 This is a schematic structural diagram of a pressure maintaining device and a pressure relief assembly of a hydraulic pump device according to an embodiment of the present utility model;

[0040] Figure 4 A cross-sectional view of a pressure maintaining device of a hydraulic pump device according to an embodiment of the present utility model;

[0041] Figure 5 This is an exploded view of the pressure relief assembly of the hydraulic pump device according to an embodiment of the present utility model.

[0042] Description of reference numerals:

[0043] 100. Hydraulic pump device;

[0044] 110. Power source;

[0045] 120. Hydraulic pump;

[0046] 130. Pressure maintaining device; 131. Main body structure; 132. First oil inlet pipeline; 133. One-way conduction assembly; 134. Detection pipeline; 135. Pressure gauge; 136. Oil return pipeline; 137. Second oil inlet pipeline;

[0047] 140. Pressure relief assembly; 141. Travel switch; 142. Second driving end; 143. Conductive assembly; 144. Push rod;

[0048] 150, swing rod; 151, first rod section; 152, second rod section;

[0049] 160, solenoid valve group;

[0050] 170. Display unit;

[0051] 180. Overflow valve. DETAILED DESCRIPTION

[0052] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0053] In the description of the present invention, it should be noted that, unless otherwise specified, "plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be construed as limiting the present invention. In addition, the terms "first", "second", "third", etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model depending on the specific circumstances.

[0055] The hydraulic pump device of the present invention is described in detail below with reference to the accompanying drawings. It should be noted that the accompanying drawings and embodiments are only used to explain the hydraulic pump device of the present invention and cannot be understood as limiting the present invention.

[0056] Combined with the given Figures 1 to 5 , refer to the following embodiments.

[0057] The utility model provides a hydraulic pump device 100, which includes:

[0058] A power source 110 and a hydraulic pump 120 , wherein the power source 110 is connected to an input end of the hydraulic pump 120 to drive the hydraulic pump 120 to pump hydraulic oil;

[0059] A pressure-maintaining device 130 includes a main body structure 131 , on which a first oil inlet pipe 132 is provided. One end of the first oil inlet pipe 132 is connected to the output end of the hydraulic pump 120 , and the other end is connected to the oil circuit of the hydraulic pliers.

[0060] The pressure maintaining device 130 further includes a one-way conducting component 133 , at least a portion of which is disposed in the first oil inlet pipe 132 for one-way conduction in the first oil inlet pipe 132 to transport high-pressure oil toward the hydraulic pliers and prevent backflow.

[0061] The hydraulic pump device in this embodiment is provided with a pressure maintaining device 130. After the hydraulic pump 120 delivers high-pressure hydraulic oil to the hydraulic pliers, the pressure is maintained by the pressure maintaining device 130, which can ensure that the hydraulic pliers crimp the workpiece at a specified pressure and ensure the crimping quality, thereby reducing the occurrence of unqualified crimping due to substandard pressure.

[0062] The hydraulic pump device 100 of the present invention is particularly suitable for high-pressure crimping processes in electrical connections. The crimping process includes applying a crimping force and maintaining pressure. First, the crimping force needs to be increased to a specified pressure, such as increasing the oil supply pressure of the hydraulic pump 120 to 70 MPa, and then maintaining the pressure of 70 MPa in the hydraulic clamp. Within a specified time, such as 5 minutes, if the hydraulic clamp can apply a force to the workpiece at a constant pressure of 70 MPa, the crimping is qualified. If the oil pressure in the hydraulic clamp drops below 70 MPa within the specified time, the crimping fails.

[0063] For the crimping process under high-voltage conditions, a good pressure-maintaining state is crucial, which is related to whether the crimping of the workpiece meets the requirements. If the crimping fails, it will cause the following consequences: a huge waste of connecting terminals and crimped cables, seriously affecting the progress of high-altitude operations, and easily causing heat or even fire in the subsequent power supply or transmission process, and even causing part of the transmission line to be scrapped.

[0064] The hydraulic pump device 100 provided by the present invention ensures that the pressure requirements of the crimped workpieces are met during the crimping process, especially the pressure holding stage, by arranging a pressure holding device 130 between the hydraulic pump 120 and the hydraulic pliers, thereby avoiding the above-mentioned serious problems.

[0065] In one embodiment of the present invention, the hydraulic pump device 100 further includes a pressure relief assembly 140, at least a portion of which extends into the first oil inlet pipe 132 and is spaced apart from the one-way conducting assembly 133. Part of the pressure relief assembly 140 is capable of sliding along the first oil inlet pipe 132 toward one end of the one-way conducting assembly 133 and applying a force to the one-way conducting assembly 133. In the hydraulic pump device of this embodiment, when pressure relief is required for the hydraulic pliers, the portion of the pressure relief assembly 140 disposed within the first oil inlet pipe 132 is capable of applying a force to the one-way conducting assembly 133 and pushing the portion of the one-way conducting assembly 133 to reverse the flow of the first oil inlet pipe 132, thereby releasing the high-pressure hydraulic oil within the hydraulic pliers connected to the first oil inlet pipe 132.

[0066] In one embodiment of the present invention, the pressure relief assembly 140 is provided with a push rod 144, at least a portion of which is disposed within the first oil inlet conduit 132. This push rod 144 is used to push the one-way conducting assembly 133 along the first oil inlet conduit 132, thereby reversing the flow of the first oil inlet conduit 132 and achieving high-pressure oil recirculation. In this embodiment, the hydraulic pump device, via the push rod 144 within the pressure relief assembly 140, drives the one-way conducting assembly 133 within the first oil inlet conduit 132, reversing the flow of the first oil inlet conduit 132 and achieving high-pressure oil recirculation.

[0067] In one embodiment of the present invention, a second oil inlet pipe 137 is further provided on the main body structure 131, and a through opening is provided between the second oil inlet pipe 137 and the first oil inlet pipe 132, and the through opening is located on the side of the push rod 144 away from the one-way conduction component 133.

[0068] The second oil inlet pipe 137 is used to connect to the oil inlet pipe of the hydraulic pliers, or the second oil inlet pipe 137 is used for the oil return pipe 136 of the hydraulic pliers.

[0069] The outer circumferential surface of a portion of the push rod 144 is in dynamic sealing engagement with the inner wall of the first oil inlet pipe 132 .

[0070] In the hydraulic pump device of this embodiment, a second oil inlet pipe 137 is provided in the main body structure 131. When the second oil inlet pipe 137 is connected to the oil inlet pipe of the hydraulic pliers, the second oil inlet pipe 137 can be used as an oil supply pipe. When the second oil inlet pipe 137 is connected to the oil return pipe 136 of the hydraulic pliers, the second oil inlet pipe 137 can be used as an oil return pipe 136. Therefore, in the pressure maintaining device 130 of this embodiment, the first oil inlet pipe 132 and the second oil inlet pipe 137 can both realize the functions of oil supply and oil return.

[0071] When a three-position four-way solenoid valve can also be provided in the hydraulic pump device in this embodiment, one oil outlet of the three-position four-way solenoid valve is connected to the first oil inlet pipeline, and the other oil outlet is connected to the second oil inlet pipeline 137. The two oil outlets serve as the oil supply end and the oil return end respectively, so that the end connected to the first oil inlet pipeline 132 can be used as the oil supply end, and the end connected to the second oil inlet pipeline 137 can also be used as the oil supply end.

[0072] In one embodiment of the present invention, the pressure relief assembly 140 includes a pressure relief solenoid valve having a first driving end connected to one end of the push rod 144 to drive the push rod 144 to move within the first oil inlet pipe 132. The hydraulic pump device of this embodiment, by providing the pressure relief solenoid valve, can be operated in an emergency situation by setting the pressure relief solenoid valve so that the first driving end of the pressure relief solenoid valve drives the push rod 144 to apply force to the unidirectional conduction assembly 133 and reverse conduct the first oil inlet pipe 132, thereby relieving the high-pressure oil in the hydraulic pliers.

[0073] In one embodiment of the present invention, the hydraulic pump device 100 further includes a first remote control device having a first signal transmitting unit and a first signal receiving unit. The first signal receiving unit is electrically connected to the pressure relief solenoid valve to control the connection and disconnection of the pressure relief solenoid valve's drive circuit. The hydraulic pump device in this embodiment can remotely control the connection and disconnection of the pressure relief solenoid valve's drive circuit via the first remote control device, thereby remotely controlling the pressure relief of the hydraulic pliers in an emergency.

[0074] In one embodiment of the present invention, the pressure relief component 140 also includes a travel switch 141, and the travel switch 141 includes a second driving end 142 and a conductive component 143. The second driving end 142 is connected to a portion of the conductive component 143, and the second driving end 142 has a driving stroke to control the connection and disconnection of the conductive component 143; the conductive component 143 is also connected to the control circuit of the hydraulic pump device 100 to realize the connection and disconnection of the control circuit; the second driving end 142 is connected to the pressure relief component 140, and the pressure relief component 140 can apply a driving force to the second driving end 142 to execute the driving stroke while applying a force to the one-way conductive component 133.

[0075] The hydraulic pump device in this embodiment is provided with a travel switch 141, which realizes the disconnection of the control circuit of the hydraulic pump 120 while relieving the pressure of the hydraulic pliers. This can stop the hydraulic pump 120 from delivering high-pressure oil to the hydraulic pliers, thereby facilitating the pressure relief of the hydraulic pliers.

[0076] In one embodiment of the present invention, the hydraulic pump device 100 also includes a swing rod 150, which is provided with a first rod segment 151 and a second rod segment 152. The first rod segment 151 is connected to the pressure relief assembly 140 to drive the partial pressure relief assembly 140 to slide in the first oil inlet pipe 132.

[0077] The second rod segment 152 is connected to the second driving end 142 to drive the second driving end 142 to perform the driving stroke.

[0078] The hydraulic pump device in this embodiment realizes simultaneous control of the pressure relief assembly 140 and the travel switch 141 by providing a swing rod 150, that is, by operating the swing rod 150, the pressure relief of the hydraulic pliers and the disconnection of the control circuit of the hydraulic pump device 100 are simultaneously controlled.

[0079] In one embodiment of the present invention, the pressure maintaining device 130 and the travel switch 141 are respectively located on both sides of the swing rod 150, or the pressure maintaining device 130 and the travel switch 141 are located on the same side of the swing rod 150. The hydraulic pump device in this embodiment provides different arrangements of the pressure maintaining device 130 and the travel switch 141. The two different arrangements differ in that the directions of the forces exerted by the swing rod 150 on the pressure relief assembly 140 and the second driving end 142 of the travel switch 141 are different. Designers can arrange them according to the space size of the hydraulic pump 120.

[0080] In one embodiment of the present invention, the hydraulic pump device 100 further includes a solenoid valve assembly 160. The solenoid valve's drive circuit is connected to the control circuit, and the drive circuit is also connected to the conductive component 143. The drive circuit is controlled on and off by the conductive component 143 connected to the second drive end 142. The hydraulic pump device in this embodiment further includes a solenoid valve assembly 160. The solenoid valve assembly 160 is disposed in the oil circuit between the hydraulic pump 120 and the pressure-maintaining device 130 and is used to control the delivery of high-pressure oil to the hydraulic caliper or to control oil return.

[0081] The hydraulic pump device in this embodiment controls the connection and disconnection of the driving circuit of the solenoid valve through the travel switch 141.

[0082] In one embodiment of the present invention, when the swing rod 150 swings, the first rod segment 151 drives the one-way conduction component 133 through the push rod 144 of the pressure relief component 140, and before the first oil inlet pipe 132 is reversely conducted, the second rod segment 152 executes the driving stroke by driving the second driving end 142, and the control circuit or the driving circuit is disconnected.

[0083] When the swing rod 150 swings, the first rod segment 151 drives the one-way conducting component 133 through the push rod 144 of the pressure relief component 140. After the first oil inlet pipe 132 is reversely conducted, the second rod segment 152 drives the second driving end 142 to execute the driving stroke, and the control circuit or the driving circuit is disconnected.

[0084] The hydraulic pump device in this embodiment can be set with different specific structures according to the stroke size of the travel switch 141 and the order in which the first rod segment 151 and the second rod segment 152 of the swing rod 150 apply the force, and both can achieve reverse conduction of the first oil inlet pipeline 132 and disconnection of the control circuit of the hydraulic pump 120 or the drive circuit of the solenoid valve group 160.

[0085] In one embodiment of the present utility model, the travel switch 141 is provided with a driving module, which is used to drive the second driving end 142 to perform the driving stroke; the hydraulic pump device 100 also includes a second remote control device, which is provided with a second signal transmitting unit and a second signal receiving unit. The second signal receiving unit is electrically connected to the driving module to control the second driving end 142 to perform the driving stroke.

[0086] The hydraulic pump device in this embodiment can remotely control the connection and disconnection of the conductive component 143 in the travel switch 141, thereby connecting or disconnecting the control circuit of the hydraulic pump device 100 or the drive circuit of the electromagnetic group.

[0087] In one embodiment of the present utility model, a detection pipe 134 is further provided on the main body structure 131, and the detection pipe 134 is connected to a portion of the first oil inlet pipe 132 and can be connected to the circuit of the hydraulic pliers; the hydraulic pump device 100 also includes a pressure gauge 135, and the inlet end of the pressure gauge 135 is connected to the detection pipe 134.

[0088] In the hydraulic pump device of this embodiment, the operator can monitor the pressure in the pressure-maintaining state through the pressure gauge 135, which can assist in determining whether the crimping process is qualified.

[0089] In one embodiment of the present invention, the hydraulic pump device 100 further includes a pressure sensor, a display unit 170 and a recording unit. The detection end of the pressure sensor is disposed in the boost oil circuit of the hydraulic pump 120 .

[0090] The display unit 170 is electrically connected to the pressure sensor and is used to display the pressure detection value of the detection end.

[0091] In the hydraulic pump device of this embodiment, a pressure sensor and a display unit 170 are provided in the boost oil circuit of the hydraulic pump 120 , and an operator can monitor the boost status of the hydraulic pump 120 through the display unit 170 .

[0092] In one embodiment of the present invention, a recording unit is further included, which is electrically connected to the pressure sensor. When the pressure detection value rises to a preset value, the recording unit records the pressure increase once and displays it on the display unit 170, where the preset value can be 70MPa, 80MPa, 90MPa, 100MPa, 120MPa, 150MPa and other pressure values.

[0093] In one embodiment of the present invention, the hydraulic pump device 100 also includes a remote monitoring device, which includes a signal sending module and a signal receiving module. The signal sending module is electrically connected to the pressure sensor and is used to obtain the pressure value of the detection end, and the signal receiving module sends a signal; the signal receiving module is used to receive the signal sent by the signal starting module and form a pressure curve with the pressure value.

[0094] The hydraulic pump device in this embodiment can obtain the pressure value of the hydraulic pump 120 during the crimping process through the remote monitoring device, and multiple pressure values form a pressure curve, which makes it easy for the operator to judge the crimping status through the pressure curve.

[0095] In one embodiment of the present invention, the hydraulic pump device 100 further includes a relief valve 180, which is disposed in the oil return pipe. When the pressure of the hydraulic pump exceeds the set pressure of the relief valve 180, the relief valve 180 opens to return the hydraulic oil to the hydraulic oil tank through the oil return pipe.

[0096] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A hydraulic pump device, characterized in that: The hydraulic pump device comprises: a power source and a hydraulic pump, wherein the power source is connected to an input end of the hydraulic pump and is used to drive the hydraulic pump to pump hydraulic oil; A pressure-maintaining device, comprising a main body structure, provided with a first oil inlet pipe, one end of the first oil inlet pipe being connected to the output end of the hydraulic pump, and the other end being connected to the oil circuit of the hydraulic pliers; The pressure maintaining device further includes a one-way conducting component, at least part of which is arranged in the first oil inlet pipeline, for one-way conducting in the first oil inlet pipeline to transport high-pressure oil toward the hydraulic pliers and prevent backflow.

2. The hydraulic pump device according to claim 1, characterized in that The hydraulic pump device further includes a pressure relief assembly, at least a portion of which extends into the first oil inlet pipe and is spaced apart from the one-way conducting assembly; Part of the pressure relief component is capable of sliding along the first oil inlet pipe toward one end of the one-way conducting component and applying a force to the one-way conducting component.

3. The hydraulic pump device according to claim 2, characterized in that The pressure relief assembly is provided with a push rod, at least part of which is arranged in the first oil inlet pipe to push the one-way conducting assembly to move along the first oil inlet pipe, and the first oil inlet pipe is reversely conducted to realize the reflux of the high-pressure oil.

4. The hydraulic pump device according to claim 2, characterized in that The main body structure is further provided with a second oil inlet pipe, a through opening is provided between the second oil inlet pipe and the first oil inlet pipe, and the through opening is located on the side of the push rod away from the one-way conducting component. The second oil inlet pipeline is used to communicate with the oil inlet pipeline of the hydraulic pliers, or the second oil inlet pipeline is used as the oil return pipeline of the hydraulic pliers; Wherein, the outer peripheral surface of the partial rod section of the push rod is matched with the inner wall of the first oil inlet pipe in a dynamic seal.

5. The hydraulic pump device according to claim 3, characterized in that The pressure relief assembly includes a pressure relief solenoid valve. The pressure relief solenoid valve is provided with a first driving end. The first driving end is connected to one end of the push rod to drive the push rod to move in the first oil inlet pipeline.

6. The hydraulic pump device according to claim 5, characterized in that The hydraulic pump device also includes a first remote control device, which is provided with a first signal transmitting unit and a first signal receiving unit. The first signal receiving unit is electrically connected to the pressure relief solenoid valve to control the connection and disconnection of the drive circuit of the pressure relief solenoid valve.

7. The hydraulic pump device according to any one of claims 2 to 6, characterized in that: The pressure relief assembly further includes a travel switch, which includes a second driving end and a conductive component, wherein the second driving end is connected to a portion of the conductive component and has a driving stroke at the second driving end to control the connection and disconnection of the conductive component; The conductive component is also connected to the control circuit of the hydraulic pump device to realize the connection and disconnection of the control circuit; The second driving end is connected to the pressure relief assembly. The pressure relief assembly can apply a driving force to the second driving end to perform the driving stroke while applying a force to the one-way conducting assembly.

8. The hydraulic pump device according to claim 7, characterized in that The hydraulic pump device further includes a swing rod, the swing rod having a first rod section and a second rod section, the first rod section being connected to the pressure relief assembly to drive the partial pressure relief assembly to slide in the first oil inlet pipe; The second rod segment is connected to the second driving end to drive the second driving end to perform the driving stroke.

9. The hydraulic pump device according to claim 8, characterized in that The pressure-maintaining device and the travel switch are respectively located on both sides of the swing rod, or the pressure-maintaining device and the travel switch are located on the same side of the swing rod.

10. The hydraulic pump device according to claim 8, characterized in that The hydraulic pump device also includes a solenoid valve group, the drive circuit of the solenoid valve is connected to the control circuit, and the drive circuit is connected to the conductive component, and the connection and disconnection of the drive circuit are controlled by the conductive component connected to the second drive end.

11. The hydraulic pump device according to claim 8, wherein When the swing arm swings, the first rod segment drives the one-way conducting assembly via the push rod of the pressure relief assembly, and before the first oil inlet pipeline is reversely conducted, the second rod segment drives the second driving end to perform the driving stroke, and the control circuit or the driving circuit is disconnected; or When the swing arm swings, the first rod segment drives the one-way conduction component through the push rod of the pressure relief component. After the first oil inlet pipeline is reversely conducted, the second rod segment drives the second driving end to perform the driving stroke, and the control circuit or the driving circuit is disconnected.

12. The hydraulic pump device according to claim 7, wherein: The travel switch is provided with a driving module, and the driving module is used to drive the second driving end to perform the driving stroke; The hydraulic pump device further includes a second remote control device, which is provided with a second signal transmitting unit and a second signal receiving unit. The second signal receiving unit is electrically connected to the driving module to control the second driving end to execute the driving stroke.

13. The hydraulic pump device according to any one of claims 1 to 6, characterized in that: The main body structure is further provided with a detection pipeline, which is connected to a portion of the first oil inlet pipeline and can be connected to the circuit of the hydraulic pliers; The hydraulic pump device further comprises a pressure gauge, the inlet end of which is connected to the detection pipeline.

14. The hydraulic pump device according to any one of claims 1 to 6, characterized in that: The hydraulic pump device further includes a pressure sensor, a display unit, and a recording unit. The detection end of the pressure sensor is arranged in the boost oil circuit of the hydraulic pump. The display unit is electrically connected to the pressure sensor and is used to display the pressure detection value of the detection end; The recording unit is electrically connected to the pressure sensor. When the pressure detection value rises to a preset value, the recording unit records the pressure rise once and displays it on the display unit.

15. The hydraulic pump device according to any one of claims 1 to 6, characterized in that: The hydraulic pump device further includes a remote monitoring device, which includes a signal sending module and a signal receiving module. The signal sending module is electrically connected to the pressure sensor and is used to obtain the pressure value of the detection end, and the signal receiving module sends a signal. The signal receiving module is used to receive the signal sent by the signal generating module and form a pressure curve with the pressure value.

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