Mining hydraulic pump station

Abstract

The invention relates to the technical field of hydraulic pump stations, and discloses a mining hydraulic pump station which comprises a pump station body, a top plate is arranged at the top of the pump station body, a hydraulic pump assembly is installed at the top of the top plate, and the hydraulic pump assembly is provided with an oil return pipe and an oil suction pipe which extend into the pump station body. The transition assembly is arranged between the pump station main body and the oil return pipe, the transition assembly comprises a transition cylinder fixed at the inner bottom of the pump station main body, and an overflow seam for hydraulic oil to overflow is formed in the outer wall of the middle of the transition cylinder. The'overflow-negative pressure 'transition assembly is arranged between the oil return pipe and the oil tank, so that return oil continuously flows through a negative pressure interval in a thin-layer liquid level form, bubbles in the oil are separated out in advance and broken through dynamic sealing and continuous negative pressure, online continuous degassing of'simultaneous oil return and defoaming' is realized, and the oil return efficiency is improved. Therefore, response delay, vibration and metering errors caused by bubble compressibility are avoided, and operation stability and control precision of a hydraulic system are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic pump stations, in particular to a mine hydraulic pump station. BACKGROUND

[0002] The mine hydraulic pump station is a device specially designed for mining and mining operations, composed of high-pressure and high-flow hydraulic components and hydraulic systems, mainly used to provide hydraulic power and hydraulic medium for hydraulic equipment to drive various hydraulic equipment and machinery.

[0003] At present, the existing mine hydraulic pump station such as Chinese patent authorized publication No. CN120062198A discloses a mine hydraulic pump station, which improves the efficiency of bubble separation by slowly moving the upper and lower of the multi-hole disturbance ring plate, avoids the accumulation of foam on the liquid surface, and solves the problem that the existing technology uses paddle stirring to remove bubbles, which produces turbulence and strong flow. If there are many bubbles in the oil return fluid, it will cause the bubbles in the oil return fluid to be repeatedly decomposed into smaller bubbles, forming foam.

[0004] However, although this way can reduce the problem of bubble and foam accumulation, as the use time of hydraulic oil is prolonged and it is oxidized and aged, it will gradually become thick, thus causing the floating speed of bubbles to slow down, and making it difficult for some small bubbles to float out and break. Although it will not develop into a foam problem, the existence of small bubbles in the hydraulic oil will cause a series of problems such as slow response, vibration, heating, wear and tear, and measurement error of subsequent equipment. SUMMARY

[0005] The purpose of the present application is to provide a mine hydraulic pump station to solve at least one of the technical problems existing in the prior art.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a mine hydraulic pump station, comprising a pump station main body, the top of the pump station main body is provided with a top plate, and the top plate is provided with a hydraulic pump assembly, the hydraulic pump assembly has an oil return pipe and an oil suction pipe extending into the pump station main body, further comprising: A transition assembly is arranged between the pump station main body and the oil return pipe, the transition assembly comprises: A transition cylinder is fixed to the bottom of the pump station main body, and an overflow slot is formed in the middle outer wall of the transition cylinder for overflow of hydraulic oil; A flow casting ring is fixed to the outer side wall below the overflow slot, and an equalizing ring is fixed to the outer side wall above the overflow slot, and the bottom of the equalizing ring is provided with an annular designed ring slot; A gas blocking skirt is fixed to the outer wall of the equalizing ring, and a negative pressure gap is formed between the flow casting ring, the equalizing ring and the gas blocking skirt; A negative pressure assembly is arranged for forming a continuous negative pressure in the equalizing ring.

[0007] Optionally, the flow ring is designed to be inclined downward from the inner ring to the outer ring, and the outer edge of the flow ring is provided with a flow wall designed vertically.

[0008] Optionally, the negative pressure assembly comprises a fixed shaft fixed at the bottom of the transition cylinder, and the fixed shaft is designed to be eccentric to the transition cylinder, a piston box is rotatably installed at the top end of the fixed shaft, a piston block is slidably installed in the piston box, a horizontal rod is fixedly penetrated in the piston block, the two ends of the horizontal rod are respectively penetrated out of the two side outer walls of the piston box and are in sealing sliding connection with the penetration positions of the two side outer walls of the piston box, a gas exhaust pipe rotatable and coaxial with the fixed shaft is penetrated and installed at the top of the top plate, the bottom end of the gas exhaust pipe is designed as a forked branch pipe, the two ends of the forked branch pipe are respectively fixedly communicated with the top of the two sides of the piston box, and the two side inner walls of the forked branch pipe are both provided with a one-way valve, the outer wall of the fixed shaft is fixedly provided with a communication rod connected with the pressure equalizing ring, and the inside of the communication rod and the fixed shaft is jointly provided with an air flow channel in one-way communication with the inside of the piston box.

[0009] Optionally, the outer wall of the fixed shaft is also rotatably installed with a top cylinder, the lower half of the top cylinder is designed as a funnel filter screen, the oil return end of the oil return pipe extends into the top cylinder and is designed to be eccentric to the top cylinder, and the piston box is fixedly connected with the inner wall of the top cylinder.

[0010] Optionally, the outer wall of the funnel filter screen is provided with a plurality of drainage ribs corresponding to the filter hole positions on the funnel filter screen.

[0011] Optionally, the two ends of the horizontal rod are both rotatably installed with a roller.

[0012] Optionally, the inner bottom of the funnel filter screen is provided with an annular groove, and a detachable retention ring is installed in the annular groove.

[0013] Optionally, the top of the top plate is installed with a servo motor, the output shaft of the servo motor extends into the pump station body, and the outer walls of the gas exhaust pipe and the output shaft are fixedly provided with transmission gears in mesh with each other.

[0014] Optionally, the inner wall of the top cylinder is also installed with an energy dissipation diffuser, and the energy dissipation diffuser is a honeycomb ceramic or a perforated metal plate.

[0015] Optionally, the annular gap is covered with a hydrophobic microporous membrane or a sintered PTFE microporous sheet.

[0016] Compared with the prior art, the beneficial effects of the present application are as follows: I. The present application sets an "overflow-negative pressure" transition assembly between the oil return pipe and the oil tank, so that the oil return continuously flows through the negative pressure interval in the form of a thin layer of liquid surface, and the bubbles in the oil are precipitated and broken in advance by using dynamic sealing and continuous negative pressure, realizing online continuous degassing while returning oil and defoaming, achieving the purpose of online defoaming and reducing foam accumulation, thereby avoiding the response delay, vibration and measurement error caused by the compressibility of bubbles, and improving the stability of the hydraulic system and the control accuracy.

[0017] II. The present application synchronously drives the piston type negative pressure generator and the rotary filter screen by the same rotating power, realizes the integration of negative pressure extraction, oil filtration and impurity collection, saves the external vacuum pump and complex pipeline, prevents local blockage of the filter screen, makes the system structure compact and easy to maintain, simplifies the structure, and ensures long-period non-blocking operation.

[0018] III. The present application cooperates the flow wall, the drainage rib and the hydrophobic microporous membrane for synchronous drainage and anti-air entrainment design, so that the defoamed oil flows back along the wall surface smoothly, avoids air entrainment caused by dripping, changes the negative pressure strength as needed by using adjustable speed drive, takes into account different temperature and viscosity conditions, ensures that the pump station always works in a low-gas and low-foam state, prolongs the service life of the hydraulic components, reduces downtime maintenance, and ensures long-term stable operation of the mine equipment. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic diagram of the three-dimensional structure of the present application; Figure 2 is a front view of the present application; Figure 3 is a front view of the present application; Figure 2 is a partial enlarged view of the transition cylinder in the present application; Figure 4 is a front view of the present application; Figure 2 view of the present application; Figure 5 is a front view of the present application; Figure 2 is a sectional view along A-A of the present application; Figure 6 is an enlarged perspective view of the top cylinder of the present application; Figure 7 is a sectional view of the top cylinder of the present application.

[0020] In the figure: 1, pump station main body; 2, top plate; 3, oil return pipe; 4, oil suction pipe; 5, transition cylinder; 6, hydraulic pump assembly; 7, flow wall; 8, overflow seam; 9, flow ring; 10, pressure equalizing ring; 11, ring seam; 12, negative pressure gap; 13, gas blocking skirt; 14, fixed shaft; 15, communication rod; 16, top cylinder; 17, piston box; 18, piston block; 19, cross bar; 20, forked branch pipe; 21, exhaust pipe; 22, hopper filter screen; 23, drainage rib; 24, retention ring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application.

[0022] Please refer to Figures 1 to 7 The present application provides a technical solution: a mine hydraulic pump station, comprising a pump station body 1, the top of the pump station body 1 is provided with a top plate 2, and the top plate 2 is provided with a hydraulic pump assembly 6 extending into the pump station body 1, the hydraulic pump assembly 6 has an oil return pipe 3 and an oil suction pipe 4 extending into the pump station body 1, further comprising: A transition assembly is arranged between the pump station body 1 and the oil return pipe 3, and the transition assembly comprises: A transition cylinder 5 is fixed to the bottom of the pump station body 1, and the middle outer wall of the transition cylinder 5 is provided with an overflow slot 8 for overflow of hydraulic oil; A flow ring 9 is fixed to the outer side wall below the overflow slot 8, and an equalizing ring 10 is fixed to the outer side wall above the overflow slot 8, and the bottom of the equalizing ring 10 is provided with an annular ring slot 11; An air baffle skirt 13 is fixed to the outer wall of the equalizing ring 10, and a negative pressure gap 12 is formed between the flow ring 9, the equalizing ring 10 and the air baffle skirt 13; A negative pressure assembly is arranged for forming a continuous negative pressure in the equalizing ring 10.

[0023] When the mine hydraulic pump station is in use, the oil suction pipe 4 and the oil return pipe 3 of the hydraulic pump assembly 6 are used to realize the process of oil suction and oil return, and provide hydraulic power and hydraulic medium for hydraulic equipment to drive various hydraulic equipment and machinery. This process is the prior art, so it will not be described in detail in this case; In this case, the problem of bubbles in the hydraulic oil is solved. The transition assembly is designed between the oil return pipe 3 and the pump station body 1 to transfer the returned hydraulic oil, so as to eliminate the bubbles in the hydraulic oil in the pump station body 1. The specific mode is as follows: Specifically, refer to Figure 2 and Figure 4, the backflow hydraulic oil will first enter into the transition cylinder 5, and then will overflow from the overflow slot 8 into the negative pressure gap 12 with the rising of the liquid surface, and will flow through the flow ring 9 in a flat manner, and then will flow down from the gap between the air blocking skirt 13 and the edge of the flow ring 9. Since the liquid surface will block the gap between the overflow slot 8, the air blocking skirt 13 and the flow ring 9, a dynamic sealing effect is formed by the hydraulic oil, so that a closed space is formed in the negative pressure gap 12 during the flow of the hydraulic oil; At the same time, the negative pressure assembly forms a continuous negative pressure in the equalizing ring 10, and under the communication effect of the ring slot 11, the negative pressure gap 12 also forms a negative pressure, so that the negative pressure in the negative pressure gap 12 can make the gas bubbles in the overflow liquid surface precipitate, and since the overflow liquid surface is in a flat state and has a relatively thin thickness, the micro bubbles in the overflow liquid surface can more easily float out under the action of external negative pressure. Even if the hydraulic oil is oxidized and aged after a long time of use, the micro bubbles can also float out, and due to the effect of pressure difference, the foam layer that may appear in the overflow liquid surface will also be broken, and then the defoamed hydraulic oil will flow back to the pump station body 1, completing the entire oil return process.

[0024] In this way, by reducing the thickness of the hydraulic oil through overflow, and by matching the dynamic negative pressure in the negative pressure gap 12, compared with the stirring and defoaming in the prior art, the micro bubbles in the hydraulic oil can be removed in advance during the backflow transition process, thereby ensuring the defoaming purpose of the hydraulic oil in the pump station body 1, and avoiding a series of problems such as slow response, vibration, heating, wear and tear, and measurement error of subsequent equipment caused by the micro bubbles in the hydraulic oil, thereby protecting the subsequent hydraulic equipment.

[0025] Moreover, it is worth mentioning that the flow ring 9 is designed to be inclined downward from the inner ring to the outer ring, and the outer edge of the flow ring 9 is provided with a vertical flow wall 7.

[0026] As shown in Figures 3-4 the inclined design of the flow ring 9 can reserve sufficient cavities in the negative pressure gap 12 to avoid the suction of the ring slot 11 into the hydraulic oil when the negative pressure is generated in the equalizing ring 10, so that there is sufficient gap space between the ring slot 11 and the overflow liquid surface. The flow wall 7 is designed to serve the purpose of installing and fixing the transition cylinder 5, and on the other hand, it can guide the remaining hydraulic oil to avoid the introduction of air bubbles again by directly dropping into the liquid surface below.

[0027] In one of the more preferred embodiments, an embodiment of a negative pressure assembly is provided; The negative pressure assembly comprises a fixed shaft 14 fixed at the bottom of the transition cylinder 5, the fixed shaft 14 is eccentric with the transition cylinder 5, the top end of the fixed shaft 14 is rotatably installed with a piston box 17, the inside of the piston box 17 is slidably installed with a piston block 18, the inside of the piston block 18 is fixedly penetrated with a cross rod 19, the two ends of the cross rod 19 are respectively penetrated out of the two side outer walls of the piston box 17 and are in sealing sliding connection with the penetration positions of the two side outer walls of the piston box 17, the top of the top plate 2 is penetrated with an exhaust pipe 21 which is rotatable and coaxial with the fixed shaft 14, the bottom end of the exhaust pipe 21 is provided with a forked branch pipe 20, the two ends of the forked branch pipe 20 are respectively fixedly communicated with the top of the two sides of the piston box 17, and the two side inner walls of the forked branch pipe 20 are respectively provided with a one-way valve, the outer wall of the fixed shaft 14 is fixedly installed with a communication rod 15 connected with the pressure equalizing ring 10, and the inside of the communication rod 15 and the fixed shaft 14 is jointly provided with an air flow channel in one-way communication with the inside of the piston box 17.

[0028] Specifically refer to Figure 2 、 Figure 5 and Figure 7 In the process of returning oil, the exhaust pipe 21 is driven to rotate by the external structure, and the piston box 17 is driven to rotate by the forked branch pipe 20 at the bottom end of the exhaust pipe 21, and because the exhaust pipe 21 and the fixed shaft 14 are eccentric with the transition cylinder 5, the two ends of the cross rod 19 are alternately in sliding contact with the inner wall of the transition cylinder 5 in the process of rotating the piston box 17, so that the piston block 18 is driven to reciprocate in the inside of the piston box 17 in the process of rotating the piston box 17, so that the space on the two sides of the piston block 18 is alternately extruded and sucked, the air in the pressure equalizing ring 10 is sucked out through the air flow channel, and is discharged into the exhaust pipe 21 through the two ends of the forked branch pipe 20. In this way, the cavities on the two sides of the piston block 18 alternately suck, so that the negative pressure in the pressure equalizing ring 10 can be continuously generated, so that the continuous negative pressure in the negative pressure gap 12 can be formed, and even if the gap appears at the overflow seam 8 or the air blocking skirt 13 due to fluid fluctuation, the negative pressure gap 12 can also maintain the continuous negative pressure state.

[0029] In a further more preferred embodiment, an implementation capable of filtering the hydraulic oil returning into the transition cylinder 5 is provided to remove impurities in the returning hydraulic oil.

[0030] The outer wall of the fixed shaft 14 is further rotatably installed with a top cylinder 16, the lower half of the top cylinder 16 is provided with a funnel filter screen 22, the oil return end of the oil return pipe 3 extends into the top cylinder 16 and is eccentric with the top cylinder 16, and the piston box 17 is fixedly penetrated and connected with the inner wall of the top cylinder 16.

[0031] Specifically refer to Figure 2 、 Figure 6 and Figure 7When the hydraulic oil in the oil return pipe 3 flows back, the hydraulic oil will first enter the top cylinder 16, and then flow into the transition cylinder 5 after being filtered by the funnel filter screen 22. In addition, during the filtering process, since the oil return pipe 3 is eccentrically designed with the top cylinder 16, and the top cylinder 16 rotates together with the piston box 17, the position of the oil return pipe 3 hitting the funnel filter screen 22 when the hydraulic oil flows back will constantly change, which not only avoids local impact deformation of the funnel filter screen 22, but also avoids impurities in the filtering position from being embedded into the filter holes under the impact of the hydraulic oil, so that the hydraulic oil and impurities have enough time and space to flow to the center of the funnel filter screen 22, thereby making the filtered impurities flow to the center of the funnel filter screen 22 to prevent the funnel filter screen 22 from being blocked.

[0032] In one of the more preferred embodiments, the outer wall of the funnel filter screen 22 is provided with a plurality of drainage ribs 23 corresponding to the positions of the filter holes on the funnel filter screen 22.

[0033] Referring to Figure 6 Through the design of the drainage ribs 23, by arranging them at the positions of the filter holes, the hydraulic oil passing through the filter holes will flow downward along the drainage ribs and leave along the outer wall of the fixed shaft 14, thereby reducing and avoiding the hydraulic oil from directly falling into the oil below after being filtered, which can minimize the air from the outside being brought into the oil when the hydraulic oil drops, thereby reducing the air bubbles in the hydraulic oil and reducing the air bubble source for the subsequent defoaming process.

[0034] In a further more preferred embodiment, the two ends of the cross rod 19 are rotatably installed with rollers.

[0035] Specifically, referring to Figure 7 By installing rollers or balls at the two ends of the cross rod 19, the friction between the end of the cross rod 19 and the top cylinder 16 can be reduced, making the cross rod 19 slide more smoothly along the inner wall, and also reducing the wear debris caused by friction.

[0036] In a further more preferred embodiment, the inner bottom of the funnel filter screen 22 is provided with an annular groove, and a detachable retention ring 24 is installed in the annular groove.

[0037] Referring to Figure 7 As known from the above, the filtered impurities will flow to the center of the funnel filter screen 22, so that the installation of the detachable retention ring 24 can collect the impurities, and also facilitate the removal and cleaning of the impurities.

[0038] In one of the more preferred embodiments, an embodiment for driving the rotation of the exhaust pipe 21 is provided, which can be specifically referred to Figure 2The exhaust pipe 21 is driven to rotate by the transmission of the two transmission gears, and the speed of rotation can be controlled by adjusting the rotating speed of the servo motor, thereby controlling the negative pressure in the equalizing ring 10 and the negative pressure gap 12. The top plate 2 is provided with a servo motor, and the output shaft of the servo motor extends into the pump station body 1. The exhaust pipe 21 and the outer wall of the output shaft are provided with transmission gears that are in mesh with each other.

[0039] In a preferred embodiment, the inner wall of the top cylinder 16 is further provided with an energy dissipation diffuser, which is a honeycomb ceramic or a porous metal plate. The energy dissipation diffuser can dissipate the energy of the backflowing hydraulic oil, thereby further reducing the impact on the funnel screen 22.

[0040] In a preferred embodiment, the annular gap 11 is covered with a hydrophobic microporous membrane or a sintered PTFE microporous sheet. The hydrophobic microporous membrane or the sintered PTFE microporous sheet is used to achieve the purpose of only releasing gas but not liquid. In addition, a liquid return hole is provided at the bottom of the outermost edge of the equalizing ring 10, which is used to return the small amount of liquid that is entrained.

[0041] The standard parts used in the embodiment can be directly purchased from the market. The non-standard structural parts according to the description and drawings can be directly processed according to the existing technical knowledge without any doubt. The connection mode of each part adopts the mature conventional means in the existing technology, and the machinery, parts and equipment adopt the conventional models in the existing technology, so the specific description is not made here.

[0042] Although the embodiments of the present application have been shown and described, it is understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A mining hydraulic pump station, comprising a pump station body (1), the top of the pump station body (1) being a top plate (2), and a hydraulic pump assembly (6) mounted on the top of the top plate (2), the hydraulic pump assembly (6) having a return oil pipe (3) and a suction oil pipe (4) extending into the pump station body (1), characterized in that, Also includes: A transition assembly is provided between the main body of the pump station (1) and the return oil pipe (3), the transition assembly comprising: A transition cylinder (5) is fixed to the bottom of the pump station body (1), and an overflow slit (8) is provided on the middle outer wall of the transition cylinder (5) to allow hydraulic oil to overflow. A casting ring (9) is fixed to the outer wall below the overflow seam (8) and a pressure equalizing ring (10) is fixed to the outer wall above the overflow seam (8), and the bottom of the pressure equalizing ring (10) is provided with an annular seam (11). A baffle skirt (13) is fixed to the outer wall of the equalizing ring (10), and a negative pressure gap (12) is formed between the casting ring (9), the equalizing ring (10) and the baffle skirt (13). A negative pressure assembly is used to create a continuous negative pressure within the equalizing ring (10).

2. The mining hydraulic pump station according to claim 1, characterized in that: The casting ring (9) is designed to slope downwards from the inner ring to the outer ring, and the outer ring edge of the casting ring (9) is provided with a vertically designed casting wall (7).

3. The mining hydraulic pump station according to claim 1, characterized in that: The negative pressure assembly includes a fixed shaft (14) fixed to the bottom of the transition cylinder (5), and the fixed shaft (14) and the transition cylinder (5) are eccentrically designed. A piston box (17) is rotatably mounted on the top of the fixed shaft (14). A piston block (18) is slidably mounted inside the piston box (17). A crossbar (19) is fixedly fixed through the inside of the piston block (18). The two ends of the crossbar (19) pass through the outer walls of the piston box (17) on both sides respectively, and are slidably and sealed to the through-holes of the outer walls of the piston box (17). The top of the top plate (2) An exhaust pipe (21) that is rotatable and coaxial with the fixed shaft (14) is installed through it. The bottom end of the exhaust pipe (21) is set as a fork branch pipe (20). The two ends of the fork branch pipe (20) are respectively fixedly connected to the top of both sides of the piston box (17). The inner walls of both sides of the fork branch pipe (20) are provided with one-way valves. The outer wall of the fixed shaft (14) is fixed with a connecting rod (15) connected to the equalizing ring (10). The connecting rod (15) and the fixed shaft (14) are both provided with an air flow channel that is unidirectionally connected to the inside of the piston box (17).

4. The mining hydraulic pump station according to claim 3, characterized in that: The outer wall of the fixed shaft (14) is also rotatably mounted with a top cylinder (16), and the lower half of the top cylinder (16) is set as a funnel filter screen (22). The oil return end of the oil return pipe (3) extends into the top cylinder (16) and is eccentrically designed with the top cylinder (16). The piston box (17) is fixedly connected to the inner wall of the top cylinder (16).

5. The mining hydraulic pump station according to claim 4, characterized in that: The outer wall of the funnel filter (22) is provided with a plurality of flow-guiding ridges (23), and the flow-guiding ridges (23) correspond to the positions of the filter holes on the funnel filter (22).

6. The mining hydraulic pump station according to claim 3, characterized in that: Both ends of the crossbar (19) are rotatably mounted with rollers.

7. The mining hydraulic pump station according to claim 4, characterized in that: The funnel filter screen (22) has an annular groove at its inner bottom, and a detachable retention ring (24) is installed in the annular groove.

8. The mining hydraulic pump station according to claim 3, characterized in that: A servo motor is installed on the top of the top plate (2), and the output shaft of the servo motor extends into the pump station body (1). The exhaust pipe (21) and the outer wall of the output shaft are fixed with intermeshing transmission gears.

9. The mining hydraulic pump station according to claim 4, characterized in that: The inner wall of the top cylinder (16) is also equipped with an energy dissipation diffuser, which is a honeycomb ceramic or a porous metal plate.

10. The mining hydraulic pump station according to any one of claims 1-9, characterized in that: The annular seam (11) is lined with a hydrophobic microporous membrane or a sintered PTFE microporous sheet.

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