Intelligent pressure control system of hydraulic pump

Abstract

The invention discloses an intelligent pressure control system of a hydraulic pump, and the system comprises a pressure sensor which senses the pressure of a hydraulic system and generates a corresponding sensing pressure value; the overflow valve capable of automatically adjusting pressure is also mounted on the hydraulic pipeline led out of the hydraulic pump; the controller receives an induction pressure value transmitted by the pressure sensor, a preset pressure value is set in the controller, when the induction pressure value is smaller than the preset pressure value, the controller controls the overflow valve capable of automatically adjusting the pressure to adjust the pressure, and when the induction pressure value transmitted by the pressure sensor is close to the preset pressure value, the overflow valve capable of automatically adjusting the pressure is closed. An overflow valve capable of automatically adjusting pressure slowly works; and the overflow valve capable of automatically adjusting the pressure stops working until the sensed pressure value is equal to the preset pressure value. The hydraulic pump is controlled through the controller, the pressure sensor and the overflow valve capable of automatically adjusting the pressure, adjustment is accurate, and safety is improved.

Description

Technical Field

[0001] The invention relates to an intelligent pressure control system, in particular to an intelligent pressure control system of a hydraulic pump. Background Art

[0002] The hydraulic pump is a power element of the hydraulic system that is driven by an engine or an electric motor and converts mechanical energy into hydraulic energy.

[0003] The pressure control of the existing hydraulic pump is achieved by manually adjusting the manual relief valve. For example, the Chinese patent with the patent number "201810030923.X" discloses a force-enhancing control system for the push-pull mechanism of a horizontal directional drilling rig, which includes an oil tank, a hydraulic pump, a manual multi-way valve, a first and a second hydraulic motor, a manual relief valve, and a normally open two-position three-way solenoid valve. The oil outlet of the hydraulic pump is connected to an oil inlet of the manual multi-way valve through an oil pipe, and the manual multi-way valve is connected to the first and the second hydraulic motors respectively. The oil inlet of the manual relief valve is connected to the oil outlet of the normally open two-position three-way solenoid valve through an oil pipe. The push-pull force of the horizontal directional drilling rig during general construction is determined by the pressure of the manual relief valve.

[0004] The existing technology has the following problems: the pressure adjustment of the manual relief valve is mainly set by the workers' experience, and the adjustment is inaccurate, which is easy to cause safety accidents. In addition, workers are required to perform on-site adjustments, which has high labor costs and low efficiency. Summary of the invention

[0005] In view of the above situation, in order to solve the technical problems of the prior art, the present invention provides an intelligent pressure control system for a hydraulic pump.

[0006] The present invention solves the above technical problems through the following technical solutions: an intelligent pressure control system for a hydraulic pump, characterized in that the intelligent pressure control system for a hydraulic pump comprises: A pressure sensor is installed on a hydraulic pipeline led from a hydraulic pump. The pressure sensor senses the pressure of a hydraulic system and generates a corresponding sensed pressure value. The overflow valve for automatically adjusting the pressure is also installed on the hydraulic pipeline leading out of the hydraulic pump; The controller is connected with the pressure sensor, the hydraulic pump and the overflow valve for automatically adjusting the pressure. The controller receives the sensed pressure value transmitted by the pressure sensor. A preset pressure value is set in the controller. When the sensed pressure value is less than the preset pressure value, the controller controls the overflow valve for automatically adjusting the pressure to adjust the pressure. When the sensed pressure value transmitted by the pressure sensor is close to the preset pressure value, the overflow valve for automatically adjusting the pressure works slowly; until the sensed pressure value is equal to the preset pressure value, the overflow valve for automatically adjusting the pressure stops working.

[0007] Preferably, the controller is also connected to an operating device, and the operating device can set a preset pressure value in the controller.

[0008] Preferably, the operating device is a touch screen, a handheld operator, or a barcode scanner.

[0009] Preferably, the controller adopts a PLC or a single chip microcomputer.

[0010] Preferably, the intelligent pressure control system of the hydraulic pump further comprises a communication module, which is connected to the pressure sensor and the controller, transmits control commands to the controller, and receives the sensed pressure value transmitted by the pressure sensor in real time.

[0011] Preferably, the automatically pressure-adjusting overflow valve includes a motor housing, a motor, a motor shaft, a motor seat, a sleeve, a connecting piece, a threaded rod, a valve seat, a spring, and a valve core. The motor housing is fixed to the motor seat, the motor is installed on the motor seat, the motor shaft is connected to one end of the motor, the motor shaft is connected to one end of the connecting piece through a sleeve, the other end of the connecting piece is fixed to the threaded rod, the valve seat is fixed to one end of the motor seat, the threaded rod is threadedly connected to an internal threaded portion of the valve seat, the spring is located between the threaded rod and the valve core, and the valve core is located on the inner side of one end of the valve seat.

[0012] Preferably, the motor shaft adopts a partially flat structure, one end of the connecting piece also adopts a partially flat structure, and a partially flat through hole is provided in the middle of the sleeve.

[0013] Preferably, the other end of the connecting piece is provided with a plug hole, and the plug hole is convenient for inserting one end of the threaded rod. The connecting piece is provided with a first pin hole, and one end of the threaded rod is provided with a second pin hole.

[0014] Preferably, the valve seat is provided with an external threaded portion.

[0015] Preferably, an oil inlet is provided on one end of the valve seat, and an oil outlet is provided near the external threaded portion of the valve seat.

[0016] The positive and progressive effects of the present invention are: First, the present invention does not require structural modification of the hydraulic pump. The present invention controls the hydraulic pump through a controller, a pressure sensor, and a relief valve that automatically adjusts the pressure. The adjustment is accurate, no safety accidents will occur, safety is improved, and workers are not required to perform on-site adjustments.

[0017] Secondly, the present invention conveniently controls the oil pressure through components such as motors and threaded rods, so that the system pressure forms a dynamic balance with the spring force, obtains the system pressure, realizes automatic and precise adjustment, is easy to adjust, and reduces labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a principle block diagram of the intelligent pressure control system of the hydraulic pump of the present invention.

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the overflow valve for automatically adjusting pressure of the present invention.

[0020] Figure 3 It is a front view of the overflow valve for automatically adjusting pressure of the present invention.

[0021] Figure 4 For along Figure 3 Cross-sectional view in the AA direction.

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the motor and the motor shaft in the present invention.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the sleeve in the present invention.

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the connecting piece in the present invention.

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of the threaded rod in the present invention. Implementation

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] like Figure 1 As shown, the intelligent pressure control system of the hydraulic pump of the present invention comprises: A pressure sensor is installed on a hydraulic pipeline led from a hydraulic pump. The pressure sensor senses the pressure of a hydraulic system and generates a corresponding sensed pressure value. The overflow valve for automatically adjusting the pressure is also installed on the hydraulic pipeline leading out of the hydraulic pump; The controller is connected with the pressure sensor, the hydraulic pump and the overflow valve for automatically adjusting the pressure. The controller receives the sensed pressure value transmitted by the pressure sensor. A preset pressure value is set in the controller. When the sensed pressure value is less than the preset pressure value, the controller controls the overflow valve for automatically adjusting the pressure to adjust the pressure. When the sensed pressure value transmitted by the pressure sensor is close to the preset pressure value, the overflow valve for automatically adjusting the pressure works slowly; until the sensed pressure value is equal to the preset pressure value, the overflow valve for automatically adjusting the pressure stops working.

[0030] The controller can also be connected to an operating device, and the operating device can set the preset pressure value in the controller for easy use. The operating device can be a touch screen or a handheld operator or a barcode scanner, which has a wide range of applications. The controller adopts a PLC (programmable logic controller) or a single-chip microcomputer, which has a simple structure and low cost. The intelligent pressure control system of the hydraulic pump of the present invention also includes a communication module, which is connected to the pressure sensor and the controller. The communication module can convey control commands to the controller for easy control. In addition, the communication module can also receive the induced pressure value transmitted by the pressure sensor in real time to achieve remote monitoring.

[0031] like Figures 2 to 4 As shown, the overflow valve for automatically adjusting pressure includes a motor housing 1, a motor 2, a motor shaft 3, a motor seat 4, a sleeve 5, a connecting piece 6, a threaded rod 7, a valve seat 8, a spring 9, and a valve core 10. The motor housing 1 is fixed to the motor seat 4, the motor 2 is installed on the motor seat 4, the motor shaft 3 is connected to one end of the motor 2, the motor shaft 3 is connected to one end of the connecting piece 6 through the sleeve 5, the other end of the connecting piece 6 is fixed to the threaded rod 7, the valve seat 8 is fixed to one end of the motor seat 4, the threaded rod 7 is threadedly connected to an internal threaded portion of the valve seat 8, the spring 9 is located between the threaded rod 7 and the valve core 10, and the valve core 10 is located on the inner side of one end of the valve seat 8.

[0032] Among them, in this embodiment, if Figures 5 to 7 As shown, the motor shaft 3 adopts a partially flat structure, one end of the connecting piece 6 also adopts a partially flat structure, and a partially flat through hole 11 is provided in the middle of the sleeve 5, which facilitates connection and positioning and prevents axial rotation.

[0033] Further, if Figures 7 and 8 As shown, the other end of the connecting member 6 is provided with a socket 12, and the socket 12 is convenient for inserting one end of the threaded rod 7. A first pin hole 13 is provided on the connecting member 6, and a second pin hole 14 is provided on one end of the threaded rod 7. The first pin hole 13 and the second pin hole 14 can allow a cotter pin to pass through, so as to facilitate fixing the other end of the connecting member 6 to the threaded rod 7.

[0034] In a preferred embodiment, Figure 2 As shown, the valve seat 8 is provided with an external threaded portion 15 for convenient connection of external devices. An oil inlet 17 is provided at one end of the valve seat 8, and an oil outlet 16 is provided near the external threaded portion 15 of the valve seat 8 for convenient use.

[0035] When in use, hydraulic oil enters from the oil inlet 17, the oil inlet 17 is disconnected from the oil outlet 16, and the pressure at the end of the valve core 20 increases; when the pressure at the end of the valve core 10 is greater than the elastic force of the spring 9, the valve core 10 moves toward the spring 9 side, the oil inlet 17 is connected to the oil outlet 16, and the hydraulic oil entering the oil inlet 17 flows out from the oil outlet 16; when the relief valve adjusts the pressure, the motor 2 is started, and the motor shaft 3 drives the threaded rod 7 to rotate through the sleeve 5 and the connecting piece 6, and sliding occurs between the connecting piece 6 and the sleeve 5, and the threaded rod 7 compresses the spring 9. The elastic force of the spring 9 is greater than the pressure at the end of the valve core 10, so that the valve core 10 moves to the oil inlet 17 side, and the oil inlet 17 is disconnected from the oil outlet 16, thereby facilitating the control of the oil pressure, so that the system pressure forms a dynamic balance with the spring force, the system pressure is obtained, automatic adjustment and precise adjustment are achieved, the adjustment is convenient, and the labor cost is reduced.

[0036] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An intelligent pressure control system for a hydraulic pump, characterized in that: The intelligent pressure control system of the hydraulic pump comprises: A pressure sensor is installed on a hydraulic pipeline led from a hydraulic pump. The pressure sensor senses the pressure of a hydraulic system and generates a corresponding sensed pressure value. The overflow valve for automatically adjusting the pressure is also installed on the hydraulic pipeline leading out of the hydraulic pump; The controller is connected with the pressure sensor, the hydraulic pump and the overflow valve for automatically adjusting the pressure. The controller receives the sensed pressure value transmitted by the pressure sensor. A preset pressure value is set in the controller. When the sensed pressure value is less than the preset pressure value, the controller controls the overflow valve for automatically adjusting the pressure to adjust the pressure. When the sensed pressure value transmitted by the pressure sensor is close to the preset pressure value, the overflow valve for automatically adjusting the pressure works slowly; until the sensed pressure value is equal to the preset pressure value, the overflow valve for automatically adjusting the pressure stops working.

2. The intelligent pressure control system of a hydraulic pump according to claim 1, characterized in that: The controller is also connected to an operating device, and the operating device can set a preset pressure value in the controller.

3. The intelligent pressure control system of a hydraulic pump according to claim 2, characterized in that: The operating device is a touch screen, a handheld operator or a barcode scanning gun.

4. The intelligent pressure control system of a hydraulic pump according to claim 1, characterized in that: The controller adopts PLC or single chip microcomputer.

5. The intelligent pressure control system of a hydraulic pump according to claim 1, characterized in that: The intelligent pressure control system of the hydraulic pump also includes a communication module, which is connected to the pressure sensor and the controller. The communication module transmits control commands to the controller and receives the sensed pressure value transmitted by the pressure sensor in real time.

6. The intelligent pressure control system of a hydraulic pump according to claim 1, characterized in that: The automatic pressure-adjusting overflow valve includes a motor housing, a motor, a motor shaft, a motor seat, a sleeve, a connecting piece, a threaded rod, a valve seat, a spring, and a valve core. The motor housing is fixed to the motor seat, the motor is installed on the motor seat, the motor shaft is connected to one end of the motor, the motor shaft is connected to one end of the connecting piece through a sleeve, the other end of the connecting piece is fixed to the threaded rod, the valve seat is fixed to one end of the motor seat, the threaded rod is threadedly connected to an internal threaded portion of the valve seat, the spring is located between the threaded rod and the valve core, and the valve core is located on the inner side of one end of the valve seat.

7. The intelligent pressure control system of a hydraulic pump according to claim 6, characterized in that: The motor shaft adopts a partially flat structure, one end of the connecting piece also adopts a partially flat structure, and a partially flat through hole is arranged in the middle of the sleeve.

8. The intelligent pressure control system of a hydraulic pump according to claim 6, characterized in that: The other end of the connecting piece is provided with a plug hole, which is convenient for one end of the threaded rod to be inserted. The connecting piece is provided with a first pin hole, and one end of the threaded rod is provided with a second pin hole.

9. The intelligent pressure control system of a hydraulic pump according to claim 6, characterized in that: An external threaded portion is provided on the valve seat.

10. The intelligent pressure control system of a hydraulic pump according to claim 6, characterized in that: An oil inlet is arranged on one end of the valve seat, and an oil outlet is arranged near the external threaded portion of the valve seat.

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