Hand pump and hydraulic brake

Abstract

The present invention relates to the technical field of water conservancy engineering, and in particular to a hand pump and a hydraulic gate. The hand pump comprises an oil inlet and an oil outlet; a piston located between the oil inlet and the oil outlet; and a variable speed force-enhancing structure for driving the piston to move. The hand pump provided by the present invention utilizes a variable speed force-enhancing structure to move the piston, thereby reducing the labor intensity of workers. This not only solves the problem that the existing hydraulic gate cannot achieve gate lifting and lowering without electricity, but also enables workers to more easily inlet and outlet oil from the hand pump, that is, it is not particularly strenuous to lift and lower the gate by manpower.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy engineering, and in particular to a hand pressure pump and a hydraulic gate. Background Art

[0002] Hydraulic gates used in water conservancy projects are generally driven by the power generated by hydraulics.

[0003] In the related technology, the flow of hydraulic pressure generally needs to be driven by a power source such as a motor or an oil pump to drive a hydraulic station to generate hydraulic pressure to realize the extension and retraction of the oil cylinder, thereby controlling the lifting and lowering of the gate.

[0004] In some remote mountainous areas, due to the lack of electricity, the traditional drive system cannot rely on the energy generated by the hydraulic station to raise and lower the gates. When the upstream river and reservoir need to store water, if the gates are not raised in time, it will cause a waste of water storage in the upstream river or threaten the safety of the downstream; at the same time, when floods occur, the gates also need to be lowered in time.

[0005] Therefore, there is an urgent need for a hand pump and a hydraulic brake to solve the above problems. Summary of the invention

[0006] The invention provides a hand pressure pump and a hydraulic gate to solve the problem that the existing hydraulic gate cannot realize gate lifting and lowering in the absence of electricity.

[0007] A first aspect of the present invention provides a hand pump, comprising:

[0008] Oil inlet and outlet;

[0009] A piston, located between the oil inlet and the oil outlet;

[0010] The speed-changing force-increasing structure is used to drive the piston to move.

[0011] Optionally, the speed-changing force-amplifying structure includes a worm wheel and a worm connected to the worm wheel, and the end of the worm is connected to the piston.

[0012] Optionally, there are two or more hand pumps, and the worm gears of two adjacent hand pumps are connected via a coupling.

[0013] Optionally, when the number of the hand pump is one, the worm gear is further connected to a hand crank;

[0014] When the number of the hand pumps is two or more, the worm gears of the two outermost hand pumps are further connected to a hand crank.

[0015] A second aspect of the present invention provides a hand pump, comprising two hydraulic pumps arranged in parallel, the hand pump being provided with two oil inlets and one oil outlet, the two hydraulic pumps being connected to the two oil inlets respectively and being connected to the oil outlet in common;

[0016] A first one-way valve is provided between each hydraulic pump and the oil outlet, and each hydraulic pump is provided with a control rod for controlling the inflow and outflow of hydraulic oil;

[0017] By controlling the control rod to rise or fall at the same time, oil can be introduced into one of the oil inlets and discharged from the other oil outlet.

[0018] A third aspect of the present invention provides a hydraulic gate, comprising a gate and an oil tank, wherein the gate is provided with a first hydraulic cylinder, and an oil inlet pipeline and a first oil drain pipeline are respectively provided between the first hydraulic cylinder and the oil tank;

[0019] Along the oil inlet direction, a hand pressure pump, a first reversing valve, a hydraulically controlled one-way valve and a first stop valve are sequentially arranged on the oil inlet pipeline, the hand pressure pump is connected to the oil tank, and the first stop valve is connected to the first hydraulic cylinder;

[0020] Along the oil leakage direction, the first oil leakage pipeline is provided with the first stop valve, the hydraulically controlled one-way valve and the first reversing valve in sequence, and the first reversing valve is connected to the oil tank;

[0021] The hand pump is the hand pump mentioned above.

[0022] Optionally, a second oil drain pipeline is further connected between the first hydraulic cylinder and the oil tank, and a second stop valve, a second one-way valve and a third stop valve are sequentially arranged on the second oil drain pipeline along the oil drain direction, the second stop valve is connected to the first hydraulic cylinder, and the third stop valve is connected to the oil tank;

[0023] The first stop valve and the second stop valve are arranged in parallel.

[0024] Optionally, a third oil drain pipeline is further connected between the first hydraulic cylinder and the oil tank, and along the oil drain direction, the second stop valve, the second one-way valve and the ball valve are sequentially arranged on the third oil drain pipeline;

[0025] The ball valve is connected to the second hydraulic cylinder, the second reversing valve and the sequence valve in sequence, and the sequence valve is connected to the third oil drain pipeline;

[0026] When the pressure of the third oil drain line exceeds a preset pressure, the sequence valve opens.

[0027] Optionally, the first reversing valve and the second reversing valve are both three-position four-way valves.

[0028] Optionally, the hand pump is also connected to an overflow valve, and the overflow valve is connected to the oil tank.

[0029] The technical solution provided by the present invention can achieve the following beneficial effects:

[0030] The hand pump provided by the present invention utilizes a variable speed force-enhancing structure to move the piston, thereby reducing the labor intensity of workers. This not only solves the problem that the existing hydraulic gate cannot achieve gate lifting and lowering without electricity, but also enables workers to more easily make the hand pump in and out of oil, that is, using manpower to lift and lower the gate will not be particularly strenuous.

[0031] It is to be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the structure of a hand pump provided in Embodiment 1 of the present invention;

[0033] Figure 2 A schematic diagram of the structure of a hand pump provided in Embodiment 2 of the present invention;

[0034] Figure 3 A schematic diagram of the structure of a hand pump provided in Embodiment 3 of the present invention;

[0035] Figure 4 for Figure 3 The schematic diagram of the working principle of the hand pump shown;

[0036] Figure 5 A hydraulic principle diagram of a hydraulic brake provided in an embodiment of the present invention.

[0037] Reference numerals:

[0038] 10-Hydraulic pump;

[0039] 101- first one-way valve;

[0040] 102 - control lever;

[0041] 11-Oil inlet;

[0042] 12- oil outlet;

[0043] 13-piston rod;

[0044] 14-Piston;

[0045] 2-speed-changing force-increasing structure;

[0046] 21-worm;

[0047] 30-coupling;

[0048] 40-hand crank;

[0049] 401-connector;

[0050] 51-gate;

[0051] 511-first hydraulic cylinder;

[0052] 52-Fuel tank;

[0053] 60-Oil inlet pipeline;

[0054] 601-Hand pump;

[0055] 602-first reversing valve;

[0056] 603-hydraulic controlled check valve;

[0057] 604-first stop valve;

[0058] 605-Relief valve;

[0059] 606-pressure gauge;

[0060] 70-first oil drain pipeline;

[0061] 80-second oil drain line;

[0062] 801- second stop valve;

[0063] 802- second one-way valve;

[0064] 803-the third stop valve;

[0065] 90-third oil drain pipeline;

[0066] 901-sequence valve;

[0067] 902- second reversing valve;

[0068] 903-second hydraulic cylinder;

[0069] 904-Ball valve.

[0070] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention. DETAILED DESCRIPTION

[0071] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0072] In the description of the present invention, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "plurality" refers to two or more; the terms "connected" and "fixed" should be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the description of this specification, it should be understood that the directional words such as "upper" and "lower" described in the embodiments of the present invention are described at the angles shown in the drawings and should not be understood as limiting the embodiments of the present invention. In addition, in the context, it should also be understood that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0074] Embodiment 1

[0075] like Figure 1 As shown, it is a schematic diagram of the structure of a hand pump provided in Embodiment 1 of the present invention. The hand pump comprises a housing, an oil inlet 11 and an oil outlet 12 arranged on the housing, wherein:

[0076] The housing contains a piston ( Figure 1 (not shown in the figure), the piston is located between the oil inlet 11 and the oil outlet 12, and is used to allow oil to enter and exit the shell. The shell is also connected to a speed-changing force-enhancing structure 2, and the speed-changing force-enhancing structure 2 is used to drive the piston to move. Optionally, the speed-changing force-enhancing structure 2 and the shell are assembled and formed separately to facilitate the forming of the hand pump. The hand pump provided by the present invention utilizes the speed-changing force-enhancing structure 2 to move the piston, thereby reducing the labor intensity of the workers. This not only solves the problem that the existing hydraulic gate cannot achieve gate lifting and lowering without electricity, but also enables workers to more easily let the hand pump in and out of oil, that is, it will not be particularly strenuous to use manpower to lift and lower the gate.

[0077] Specifically, the speed-changing force-increasing structure 2 includes a worm gear ( Figure 1 The worm 21 is connected to the worm wheel (not shown) and a worm 21 connected to the worm gear, and a piston is connected to the end of the worm 21. Optionally, the piston is connected to the worm 21 through a piston rod, so that the piston can move up and down with the worm 21. It can be understood that the worm gear structure is a technical means well known to those skilled in the art, but the inventor's invention concept of using this conventional technical means on a hand pump to reduce the labor intensity of workers is not easy to think of, that is, the process of discovering the invention concept is creative.

[0078] Specifically, in this embodiment one, there is only one hand pump, and the worm gear is also connected to a hand crank 40, so that the worker can rotate the worm gear by moving the hand crank 40, and then drive the worm 21 to move up and down; in addition, the hand crank 40 can also utilize the principle of leverage to greatly reduce the labor intensity of the worker in pushing the worm gear to rotate.

[0079] Embodiment 2

[0080] like Figure 2 As shown, it is a schematic diagram of the structure of a hand pressure pump provided in the second embodiment of the present invention. The difference between the hand pressure pump provided in the second embodiment and the hand pressure pump provided in the first embodiment is that the number of the hand pressure pumps is two or more ( Figure 2 Only two hand pumps are shown in the figure). In the second embodiment, the worm gears of two adjacent hand pumps are connected by a coupling 30, so that the different hand pumps form a unified whole, that is, the worm gears of the other hand pumps can be driven to rotate by rotating the worm gear of one hand pump.

[0081] Further, when the number of hand pressure pumps is two or more, the worm gears of the two outermost hand pressure pumps are further connected to a hand crank 40. By arranging the hand crank 40 on the two outermost hand pressure pumps, the worm gears of all hand pressure pumps can be easily rotated.

[0082] Furthermore, a connecting piece 401 is connected between the ends of the two hand cranks 40, and the distance from the connecting piece to the worm gear is at least 10 times greater than the diameter of the worm gear. In this way, workers can easily rotate the worm gears of all hand pumps simply by operating the connecting piece 401.

[0083] Embodiment 3

[0084] like Figure 3 As shown, it is a structural schematic diagram of a hand pump provided in Example 3 of the present invention. The hand pump in Example 3 has a different working principle from the hand pumps in Examples 1 and 2, but both realize the inflow and outflow of hydraulic oil through the movement of the piston. In Example 3, the hand pump includes two hydraulic pumps 10 arranged in parallel, and the hand pump is provided with two oil inlets 11 and an oil outlet 12. The two hydraulic pumps 10 are respectively connected to the two oil inlets 11 and are commonly connected to the oil outlet 12; a first one-way valve 101 is provided between each hydraulic pump 10 and the oil outlet 12, and each hydraulic pump 10 is provided with a control rod 102 for controlling the inflow and outflow of hydraulic oil; at the same time, the control rod 102 is controlled to rise or fall, so that one of the oil inlets 11 can flow in oil and the other oil outlet 12 can flow out oil, so that in the process of switching back and forth, the hand pump can be in a working state (that is, there is always a state of oil inflow and oil outflow).

[0085] A first one-way valve 101 is provided between each hydraulic pump 10 and the oil outlet 12 , which can prevent the hydraulic oil discharged from one of the hydraulic pumps 10 from entering the other hydraulic pump 10 when the hydraulic pump 10 is discharging oil.

[0086] It is understandable that in order to simultaneously control the control rod 102 to rise or fall, a structure such as the hand crank 40 in the second embodiment may be additionally provided, which will not be described in detail herein.

[0087] It can be further understood that the hand pump in the third embodiment can also include the piston and the variable speed boost structure 2 shown in the first and second embodiments. In this way, the hand pump in the third embodiment can also use the variable speed boost structure 2 to move the piston, thereby reducing the labor intensity of the workers.

[0088] See also Figure 4 , which is Figure 3 The working principle diagram of the hand pump shown in the figure. Each hydraulic pump 10 is respectively provided with a piston rod 13 and a piston 14. The piston rod 13 can be connected to the control rod 102, or the control rod 102 can replace the piston rod 13, that is, the control rod 102 is directly connected to the piston 14. The oil inlet 11 of one hydraulic pump 10 is located on the first side (e.g., the lower side) of the piston 14, and the oil inlet 11 of the other hydraulic pump 10 is located on the second side (e.g., the upper side) of the piston 14; similarly, the oil outlet 12 is respectively located on the second side (e.g., the upper side) and the first side (e.g., the lower side) of the piston 14. In this way, by controlling the control rod 102 to rise or fall at the same time, one of the oil inlets 11 can be filled with oil, and the other oil outlet 12 can be discharged with oil.

[0089] The embodiment of the present invention also provides a hydraulic brake, see Figure 5 , which is a hydraulic principle diagram of a hydraulic gate. The hydraulic gate comprises a gate 51 and an oil tank 52, wherein the gate 51 is provided with a first hydraulic cylinder 511, and an oil inlet pipeline 60 and a first oil drain pipeline 70 are respectively provided between the first hydraulic cylinder 511 and the oil tank 52; along the oil inlet direction, a hand pressure pump 601, a first reversing valve 602, a hydraulically controlled one-way valve 603 and a first stop valve 604 are sequentially provided on the oil inlet pipeline 60, the hand pressure pump 601 is connected to the oil tank 52, and the first stop valve 604 is connected to the first hydraulic cylinder 511; along the oil drain direction, a first stop valve 604, a hydraulically controlled one-way valve 603 and a first reversing valve 602 are sequentially provided on the first oil drain pipeline 70, and the first reversing valve 602 is connected to the oil tank 52; the hand pressure pump 601 is a hand pressure pump provided by any one of the embodiments 1 to 3.

[0090] That is, when the gate 51 needs to be raised, the hand pump 601 is manually moved back and forth to supply hydraulic oil to the first hydraulic cylinder 511, thereby raising the gate 51. When the oil is discharged, the first reversing valve 602 is transposed, and the hand pump 601 is manually moved back and forth, so that the hydraulic oil supplied by the hand pump 601 passes through the first reversing valve 602 to open the other circuit of the hydraulic control check valve 603 (this is a feature of the hydraulic control check valve 603, which will not be described in detail here), so that the hydraulic oil in the first hydraulic cylinder 511 returns to the oil tank 52 through the first oil drain pipeline 70, and the gate 51 can also be gradually lowered by the external force of the dead weight of the gate 51 and the dead weight of the plunger of the first hydraulic cylinder 511.

[0091] Furthermore, the hydraulic gate also has a second gate lowering mode. A second oil drain pipeline 80 is also connected between the first hydraulic cylinder 511 and the oil tank 52. Along the oil drain direction, the second oil drain pipeline 80 is sequentially provided with a second stop valve 801, a second one-way valve 802 and a third stop valve 803. The second stop valve 801 is connected to the first hydraulic cylinder 511, and the third stop valve 803 is connected to the oil tank 52. The first stop valve 604 and the second stop valve 801 are arranged in parallel.

[0092] In the second gate lowering method, there is no need to manually move the hand pump 601. You only need to open the second stop valve 801 and the third stop valve 803. In this way, the hydraulic oil in the first hydraulic cylinder 511 returns to the oil tank 52 through the second oil drain pipeline 80. At the same time, the gate 51 can also gradually descend by utilizing the external force of the deadweight of the gate 51 and the deadweight of the plunger of the first hydraulic cylinder 511.

[0093] Furthermore, the hydraulic gate has a third gate lowering mode. A third oil drain pipeline 90 is also connected between the first hydraulic cylinder 511 and the oil tank 52. Along the oil drain direction, the third oil drain pipeline 90 is sequentially provided with a second stop valve 801, a second one-way valve 802 and a ball valve 904; the ball valve 904 is sequentially connected to a second hydraulic cylinder 903, a second reversing valve 902 and a sequence valve 901, and the sequence valve 901 is connected to the third oil drain pipeline 90; when the pressure of the third oil drain pipeline 90 exceeds the preset pressure, the sequence valve 901 opens.

[0094] The third gate lowering method is mainly for the situation when flood occurs or even when there is no one on duty. When a flood occurs, the higher the flood is, the greater the load pressure on the gate 51 is. The load pressure of the gate 51 is directly transmitted to the first hydraulic cylinder 511, and the third oil drain pipeline 90 is connected to the first hydraulic cylinder 511. When the pressure of the third oil drain pipeline 90 increases to the preset pressure, the sequence valve 901 will automatically open, and the hydraulic oil will enter the second reversing valve 902, and then the second reversing valve 902 will be opened; the hydraulic oil will continue to enter the second hydraulic cylinder 903 through the second reversing valve 902, and the valve stem of the second hydraulic cylinder 903 will extend to open the ball valve 904, so that the hydraulic oil in the first hydraulic cylinder 511 will return to the oil tank 52 through the third oil drain pipeline 90, and the gate 51 can also use the external force of the deadweight of the gate 51 and the deadweight of the plunger of the first hydraulic cylinder 511 to gradually descend. Therefore, through the third gate lowering method, even in the case of no one on duty, it can ensure that the gate is lowered in time when a flood comes.

[0095] It is understandable that the first reversing valve 602 and the second reversing valve 902 are both three-position four-way valves, and of course they can also be other valves as long as they can play a reversing role. The hand pump 601 is also connected to a relief valve 605, and the relief valve 605 is connected to the oil tank 52, so that the excess hydraulic oil passing through the hand pump 601 flows back to the oil tank 52 to ensure that the inlet pressure of the relief valve 605 (i.e., the outlet pressure of the hand pump 601) is constant. The outlet of the hand pump 601 is also connected to a pressure gauge 606 to measure the outlet pressure of the hand pump 601.

[0096] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hydraulic brake, characterized in that: The hydraulic gate comprises a gate (51) and an oil tank (52); the gate (51) is provided with a first hydraulic cylinder (511); an oil inlet pipeline (60) and a third oil drain pipeline (90) are respectively provided between the first hydraulic cylinder (511) and the oil tank (52); Along the oil inlet direction, the oil inlet pipeline (60) is provided with a hand pump (601), a first reversing valve (602), a hydraulically controlled one-way valve (603) and a first stop valve (604) in sequence, the hand pump (601) is connected to the oil tank (52), and the first stop valve (604) is connected to the first hydraulic cylinder (511); Along the oil leakage direction, the third oil leakage pipeline (90) is provided with a second stop valve (801), a second check valve (802) and a ball valve (904) in sequence; The oil outlet of the second one-way valve (802) is connected to the oil inlets of the sequence valve (901) and the second reversing valve (902); the oil outlet of the sequence valve (901) is connected to the hydraulic control end of the second reversing valve (902); the oil outlet of the second reversing valve (902) is connected to the second hydraulic cylinder (903); and the valve stem of the second hydraulic cylinder (903) is connected to the ball valve (904); When the pressure of the third oil drain pipeline (90) increases to a preset pressure, the sequence valve (901) opens, the hydraulic oil enters the hydraulic control end of the second reversing valve (902), and drives the second reversing valve (902) to open; When the hydraulic oil enters the second hydraulic cylinder (903) through the second reversing valve (902), the valve stem of the second hydraulic cylinder (903) extends and drives the ball valve (904) to open, and the hydraulic oil in the first hydraulic cylinder (511) flows back to the oil tank (52) through the second stop valve (801), the second one-way valve (802) and the ball valve (904) in sequence.

2. The hydraulic brake according to claim 1, characterized in that: The hand pump (601) comprises: An oil inlet (11) and an oil outlet (12); A piston located between the oil inlet (11) and the oil outlet (12); The speed-changing force-increasing structure (2) is used to drive the piston to move.

3. The hydraulic brake according to claim 1, characterized in that: The hand pressure pump (601) comprises two hydraulic pumps (10) arranged in parallel, the hand pressure pump being provided with two oil inlets (11) and one oil outlet (12), the two hydraulic pumps (10) being respectively connected to the two oil inlets (11) and being connected together to the oil outlet (12); A first one-way valve (101) is provided between each hydraulic pump (10) and the oil outlet (12), and each hydraulic pump (10) is provided with a control rod (102) for controlling the inflow and outflow of hydraulic oil; At the same time, by controlling the control rod (102) to rise or fall, oil can be introduced into one of the oil inlets (11) and oil can be discharged from the other oil outlet (12).

4. The hydraulic brake according to any one of claims 1 to 3, characterized in that: A first oil drain pipeline (70) is also connected between the first hydraulic cylinder (511) and the oil tank (52). Along the oil drain direction, the first stop valve (604), the hydraulically controlled one-way valve (603) and the first reversing valve (602) are sequentially arranged on the first oil drain pipeline (70), and the first reversing valve (602) is connected to the oil tank (52).

5. The hydraulic brake according to any one of claims 1 to 3, characterized in that: A second oil drain pipeline (80) is also connected between the first hydraulic cylinder (511) and the oil tank (52); along the oil drain direction, a second stop valve (801), a second one-way valve (802) and a third stop valve (803) are sequentially arranged on the second oil drain pipeline (80); the second stop valve (801) is connected to the first hydraulic cylinder (511), and the third stop valve (803) is connected to the oil tank (52); The first stop valve (604) and the second stop valve (801) are arranged in parallel.

6. The hydraulic brake according to claim 1, characterized in that: The first reversing valve (602) and the second reversing valve (902) are both three-position four-way valves.

7. The hydraulic brake according to any one of claims 1 to 3, characterized in that: The hand pump (601) is also connected to a relief valve (605), and the relief valve (605) is connected to the oil tank (52).

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