A disassembling device for a liquid end of a reciprocating five-plunger water pump

Abstract

The utility model discloses a kind of disassembling devices of reciprocating five-plunger water pump hydraulic end, belong to the technical field of multi-plunger water pump maintenance equipment.The device includes the support device formed by base, vertical plate with reinforcing rib and top plate;Top plate upper is equipped with connecting rod mechanism synchronously driven by two parallel hydraulic cylinders, five thrust blocks are fixed between connecting rod;Five independently adjustable pull rods pass through thrust block and top plate in turn, its lower end is equipped with replaceable pulling screw, and upper portion is matched with thrust block by nut.The utility model is driven by hydraulic cylinder, can simultaneously apply smooth, synchronous tension to the rusted component in five valve cavities, realize disposable synchronous disassembly.It overcomes the defects of traditional manual knocking and jack pulling method, such as low efficiency, high risk, easy to damage equipment, with disassembly efficiency high, operation safety, strong applicability and the advantages of no damage to equipment ontology, especially suitable for the rapid maintenance of H-shaped steel production line descaling system high-pressure water pump.

Description

Technical Field

[0001] The utility model belongs to the technical field of special maintenance equipment for multi-plunger water pumps, and specifically relates to a disassembly device for the hydraulic end of a reciprocating five-plunger water pump. Background Art

[0002] In H-beam production lines, reciprocating five-plunger water pumps mainly supply high-pressure water for the descaling system, and the valve cores and valve seats in the hydraulic end of the water pump are vulnerable parts. In use, it is found that flow-passing components such as valve cores, valve seats and pressure sleeves are extremely prone to rust due to long-term exposure to the scouring and corrosion of high-pressure water, leading to difficulty in removal. At present, traditional methods such as manual knocking and jack pulling are mostly used on site. These methods not only have high labor intensity, poor safety and low efficiency, but especially cannot realize synchronous and stable disassembly of the components in the five valve chambers, which easily causes damage to the equipment body or mating surfaces due to uneven force. Contents of the Utility Model

[0003] The purpose of the utility model is to solve the above problems and provide a disassembly device for the hydraulic end of a reciprocating five-plunger water pump.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A disassembly device for the hydraulic end of a reciprocating five-plunger water pump comprises a support device, two connecting rods, two compression bolts, five thrust blocks, five pull rods and two hydraulic cylinders;

[0006] The support device comprises a base, two vertical plates and a top plate. Five positioning holes are formed in the middle of the top surface of the base, the spacing of the positioning holes is the same as the spacing of the valve chambers at the hydraulic end of the five-plunger water pump. The two vertical plates are respectively vertically and fixedly arranged on two sides of the top surface of the base. The top plate is fixedly arranged on the top surfaces of the two vertical plates, and five pull rod through holes corresponding to the positioning holes in position are formed in the middle of the top plate. The base, the two vertical plates and the top plate integrally form a "mouth"-shaped structure;

[0007] The two compression bolts are vertically arranged on the top plate on both sides of the pull rod through holes through threaded connection;

[0008] The two connecting rods are horizontally parallel and located above the top plate. The two hydraulic cylinders are inversely and fixedly arranged on the bottom surface of the top plate outside the two compression bolts, and the piston rods of the hydraulic cylinders pass through the top plate and are hinged with both ends of the two connecting rods. The two hydraulic cylinders are connected in parallel through a hydraulic oil circuit to ensure that their piston rods can move synchronously;

[0009] The five thrust blocks are uniformly and fixedly arranged between the two connecting rods, and their positions correspond to the pull rod through holes, so that the two hydraulic cylinders can synchronously drive the five thrust blocks and the five pull rods to lift synchronously through the two connecting rods;

[0010] All the five pull rods are threaded rods, arranged vertically, with their lower ends sequentially passing through the through holes on the thrust blocks and the pull rod perforations to extend into the middle space of the support device. A detachable pulling screw is provided at the lower end of each pull rod, and a nut is arranged on the pull rod above each thrust block;

[0011] The aperture of the through hole on the thrust block through which the pull rod passes is larger than the diameter of the pull rod, and smaller than the outer diameter of the nut, so that the nut can press on the thrust block to transmit the lifting force to the pull rod.

[0012] Further, the pulling screw is of a replaceable structure, and its end portion is provided with threads of multiple specifications to adapt to the internal threads of the shaft holes of different components to be disassembled.

[0013] Further, the hydraulic oil circuit includes a synchronizing valve or a flow dividing and collecting valve, which is used to precisely control the flow rate and speed of the two hydraulic cylinders to be consistent.

[0014] Further, reinforcing ribs are arranged between the outer side wall of the vertical plate and the base.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. The utility model adopts parallel hydraulic cylinders for synchronous driving, and the two hydraulic cylinders synchronously provide stable and powerful synchronous pulling force, which replaces the traditional manual knocking method, greatly reduces the labor intensity of operators, improves the safety of disassembly operations, can effectively avoid the damage to the matching surface of the valve cavity caused by impact load, and protects the expensive hydraulic end body;

[0017] 2. The utility model is provided with five independently adjustable pull rods, which can synchronously or selectively disassemble the rusted components in the five valve cavities at the same time, with high disassembly efficiency. By adjusting the position of the nut on the pull rod and the screwing depth of the pulling screw, it can flexibly adapt to the disassembly requirements of different valve cavity depths and different components to be disassembled such as valve seats, valve cores and pressure sleeves, with strong versatility;

[0018] 3. Through the positioning holes on the base and the compression bolts on the top plate, the utility model can quickly and accurately position and firmly compress the hydraulic end of the water pump in the support device, ensure the stability of the equipment during the disassembly process, make the pulling force act on the components to be disassembled precisely, prevent eccentric load, and further ensure the safety and effectiveness of the disassembly process;

[0019] 4. The utility model has reasonable structural design, sufficient rigidity guaranteed by the "mouth"-shaped frame and reinforcing ribs, can bear huge disassembly pulling force, operates stably and reliably, is suitable for on-site maintenance environments, and has extremely high practical and popularization value. Brief Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the utility model;

[0021] Figure 2 For Figure 1 is a schematic front view of the structure;

[0022] Figure 3 is a schematic internal structural view of the present utility model in use;

[0023] In the figures: 1. Base; 2. Vertical plate; 3. Top plate; 4. Connecting rod; 5. Clamping bolt; 6. Thrust block; 7. Pull rod; 8. Pull screw; 9. Pull rod through hole; 10. Hydraulic cylinder; 11. Limit block; 12. Reinforcing rib; 13. Positioning hole. DETAILED DESCRIPTION OF EMBODIMENTS

[0024] The present utility model will be further described below with reference to the accompanying drawings and embodiments.

[0025] As shown in Figure 1-3 , a disassembly device for the fluid end of a reciprocating five-plunger water pump includes a support device, two connecting rods 4, two clamping bolts 5, five thrust blocks 6, five pull rods 7 and two hydraulic cylinders 10;

[0026] The support device includes a base 1, two vertical plates 2 and a top plate 3. Five positioning holes 13 are formed in the middle of the top surface of the base 1, and the hole spacing is consistent with the center distance of the five valve chambers of the fluid end of the five-plunger water pump to be disassembled, for precisely positioning the fluid end. The two vertical plates 2 are respectively and vertically fixedly arranged on both sides of the top surface of the base 1, and reinforcing ribs 12 are arranged between the outer side wall of the vertical plate 2 and the base 1, which significantly enhances the rigidity and load-bearing capacity of the support device. The top plate 3 is fixedly arranged on the top surfaces of the two vertical plates 2, and five pull rod through holes 9 corresponding to the positions of the positioning holes 13 are formed in the middle of the top plate 3. The base 1, the two vertical plates 2 and the top plate 3 are integrally in a 'mouth'-shaped structure;

[0027] The two clamping bolts 5 are vertically arranged on the top plate 3 on both sides of the pull rod through hole 9 through threaded connection;

[0028] The two connecting rods 4 are horizontally and parallelly located above the top plate 3, the two hydraulic cylinders 10 are fixedly installed on the bottom surface of the top plate 3 outside the two clamping bolts 5 with their bases inverted, and the piston rods of the hydraulic cylinders 10 pass through the top plate 3 and are hinged with both ends of the two connecting rods 4;

[0029] The five thrust blocks 6 are evenly fixed between the two connecting rods 4. Each thrust block 6 has a through hole in its center, and its position corresponds to the through hole 9 of the pull rod. The five pull rods 7 are all screws, vertically arranged, with their lower ends passing through the thrust blocks 6 and the through holes 9 in sequence to extend to the middle space of the support device. Each pull rod 7 has a pull screw 8 at its lower end. Each pull rod 7 above the thrust block 6 has a nut 11. The diameter of the through hole on the thrust block 6 is larger than the diameter of the pull rod 7 to allow the pull rod 7 to pass through, but smaller than the outer diameter of the nut 11, so that the nut 11 can press on the thrust block 6 to transmit an upward pulling force.

[0030] Example 1: Simultaneous disassembly of valve seats in five valve chambers

[0031] During the overhaul of the descaling system of a certain H-beam steel production line, this utility model was used to disassemble the valve seat of the hydraulic end of a severely corroded 5ZSB-160 / 500 reciprocating five-plunger water pump.

[0032] Preparation: Place the disassembly device on a flat surface, connect a hydraulic station with a rated pressure of 31.5MPa, and install M12×1.25 threaded pull screws 8 at the lower end of the five pull rods 7.

[0033] Installation and Positioning: Hoist the hydraulic end body onto the base 1, ensuring that the bolt holes of the five valve chamber lower flanges are precisely inserted into the five positioning holes 13. Tighten the two clamping bolts 5 so that their lower end faces are pressed tightly against the upper surface of the hydraulic end, achieving reliable fixation.

[0034] Adjustment and Connection: Adjust the nuts 11 on each of the five pull rods 7 so that the lower end of the pull rod and the pulling screw 8 descend to the internal threaded hole of the valve seat. Rotate the pull rod 7 so that the pulling screw 8 is smoothly screwed into the threaded hole of the valve seat by about 8-10mm. Then, turn the nuts 11 on each pull rod 7 downwards so that they contact the upper surface of the thrust block 6.

[0035] Synchronous Pulling: Start the hydraulic station to control the piston rods of the two parallel hydraulic cylinders 10 to extend synchronously. The piston rods drive the five thrust blocks 6 to move upward synchronously through the two connecting rods 4. The thrust blocks 6 transmit the upward pulling force to the five tie rods 7 through the nuts 11, thereby smoothly pulling the five valve seats out of the valve chamber.

[0036] Results: Five severely corroded valve seats were simultaneously removed in a single pull-out process, taking approximately 5 minutes in total. Upon inspection, no scratches or cracks were found on the outer surface of the valve seats or the inner wall of the valve cavity, and the hydraulic end body remained intact.

[0037] Example 2: Disassembly of the complete set of corroded components inside a single valve chamber

[0038] In this embodiment, only the valve core, valve seat, and pressure sleeve in the third valve chamber are jammed due to the entry of foreign objects and need to be disassembled.

[0039] Preparation: Same as above.

[0040] Installation and positioning: After fixing the hydraulic end, only adjust the third lever 7, and leave the others suspended.

[0041] Connect the deepest part: Screw the pull screw 8 into the innermost valve seat threaded hole.

[0042] Single-point pull: Activate hydraulic cylinder 10. Since the five thrust blocks 6 are rigidly connected as a single unit, the force provided by the hydraulic cylinder is concentrated on the third pull rod. The powerful pull force ejects the corroded valve seat, valve core, and pressure sleeve as a whole assembly from the valve cavity in one go.

[0043] Result: The problem was solved in about 3 minutes by operating only on the faulty valve chamber, avoiding the need to disassemble other normal valve chambers and greatly improving maintenance efficiency.

[0044] To quantitatively verify the effectiveness of this invention, we conducted 50 experiments, recorded the data from each experiment and calculated the average value, and compared the results with the traditional manual striking method and the jacking method.

[0045] Experimental subject: The hydraulic end of a 5ZSB-160 / 500 type five-plunger water pump with similar degree of corrosion.

[0046] Evaluation metrics: single valve seat disassembly time, success rate, component damage rate, number of operators.

[0047] Manual tapping method 25-40 125-200 ~60% ~15% 2 people Extremely large, posing a safety hazard Jack pulling method 15-25 75-125 ~80% ~5% 2 people Large, requires frequent adjustments This utility model ~5 (Synchronized) ~5 100% 0% 1 person Low cost, one-click operation

[0048] Experimental results show that this invention reduces the total disassembly time of five valve seats from several hours in the traditional method to about 5 minutes, improving efficiency by more than 90%. It enables multi-station synchronous operation, breaking the serial work mode of the traditional method that can only process one by one. The disassembly success rate is increased from 60%-80% to 100%; the component damage rate is reduced from 5%-15% to 0%. It provides stable, vertical, and impact-free pulling force, avoiding deformation and stress concentration caused by hammering, and effectively protecting the expensive hydraulic end body and the components to be disassembled. The number of operators is reduced from 2 to 1, and the labor intensity is reduced from "extremely high" to "low". The operator only needs to control the hydraulic station valve, away from the dangerous area of ​​hammering operations and heavy physical labor. The degree of automation is high and the safety risk is extremely low.

[0049] The working process of this utility model:

[0050] When the present utility model is in use, first, according to the depth of the component to be disassembled in the valve cavity and the thread specification of the shaft hole, select an appropriate pulling screw 8 and tighten it to the lower end of the pull rod 7, lift the five pull rods 7 upward in sequence, screw the nut 11 downward to make it contact with the thrust block 6, so that the lower end of the pull rod 7 is lifted, leaving an installation space for the hydraulic end of the reciprocating five-plunger water pump;

[0051] Place the hydraulic end of the duplex five-plunger water pump to be disassembled in the middle of the "mouth"-shaped structure of the support device, make the five valve cavities of the hydraulic end correspond to the positioning holes 13 one by one, after adjustment, screw the compression bolts 5 on both sides downward, so that their lower ends firmly abut against both sides of the top surface of the hydraulic end of the duplex five-plunger water pump to fix it;

[0052] According to the depth of the component to be disassembled in the valve cavity, screw the nuts 11 upward in sequence to move the pull rods 7 downward, so that the lower ends of the pull rods extend into the corresponding valve cavities, then slowly screw the nuts 11 to adjust the height of the pull rods 7, so that the pulling screws 8 reach the position of the component to be disassembled, then slowly turn the pull rods 7 to drive the pulling screws 8 to rotate, so that the pulling screws 8 extend into the shaft holes of the required component to be disassembled, adjust the position of the nuts 11 to make them contact with the thrust block 6, then start the two hydraulic cylinders 10 synchronously, the piston rods of the hydraulic cylinders extend to drive the connecting rods 4 and the thrust block 6 to move upward, the thrust block 6 drives the pull rods 7 to move upward through the nuts 11, the pull rods 7 drive the connected required component to be disassembled to move upward through the pulling screws 8, and when the required component to be disassembled is completely separated from the valve cavity, the hydraulic cylinders 10 stop operating.

[0053] The two hydraulic cylinders 10 are supplied with oil by an external hydraulic station, their oil inlet pipelines are connected in parallel, and a synchronizing valve is arranged in the pipelines to ensure that the extension and retraction speeds of the piston rods of the two hydraulic cylinders 10 are consistent, so as to ensure the synchronism of the five pull rods 7 and avoid additional stress on the hydraulic end of the water pump caused by asynchronization.

[0054] For a plurality of coaxially installed rusted components, by connecting the pulling screw 8 to the innermost component, the entire set of rusted assemblies can be sequentially ejected through one pulling action, which solves the problem of jamming of multi-layer components, and the entire set of assemblies can be sequentially ejected by one pulling, with extremely high efficiency.

[0055] After the disassembly is completed, turn the pull rod 7 or the disassembled component in the reverse direction to make the pulling screw 8 withdraw from the disassembled component, continue to lift the pull rod 7 upward, then screw the nut 11 to the position of the thrust block 6, so that the lower end of the pull rod 7 is suspended, while lifting the pull rod 7 upward, start the hydraulic cylinder 10 to make its piston rod retract until the connecting rod returns to the original position, screw the compression bolts 5 on both sides upward to loosen the hydraulic end of the five-plunger water pump, and take it out.

[0056] The five levers of this invention can operate the five valve chambers of the hydraulic end of the five-plunger water pump simultaneously, or, depending on actual maintenance needs, only one or a few faulty valve chambers can be operated individually, offering good flexibility and strong adaptability.

Claims

1. A disassembly device for the hydraulic end of a reciprocating five-plunger water pump, characterized in that, comprising a support device, two connecting rods (4), two compression bolts (5), five thrust blocks (6), five pull rods (7) and two hydraulic cylinders (10); The support device comprises a base (1), two vertical plates (2) and a top plate (3). Five positioning holes (13) are opened in the middle of the top surface of the base (1), and the distance between the positioning holes (13) is the same as the distance between the valve chambers of the hydraulic end of the five-plunger water pump. The two vertical plates (2) are respectively and vertically fixed on both sides of the top surface of the base (1), the top plate (3) is fixed on the top surfaces of the two vertical plates (2), and five pull rod through holes (9) corresponding to the positions of the positioning holes (13) are opened in the middle of the top plate (3). The base (1), the two vertical plates (2) and the top plate (3) integrally form a "mouth"-shaped structure; The two compression bolts (5) are vertically arranged on the top plate (3) on both sides of the pull rod through holes (9) through threaded connection; The two connecting rods (4) are horizontally and parallelly located above the top plate (3), the two hydraulic cylinders (10) are inversely fixed on the bottom surface of the top plate (3) outside the two compression bolts (5), and the piston rods of the hydraulic cylinders (10) pass through the top plate (3) and are hinged with both ends of the two connecting rods (4). The two hydraulic cylinders (10) are connected in parallel through a hydraulic oil circuit to ensure that their piston rods can move synchronously; The five thrust blocks (6) are uniformly fixed between the two connecting rods (4), and their positions correspond to the pull rod through holes (9), so that the two hydraulic cylinders (10) can synchronously drive the five thrust blocks (6) and the five pull rods (7) to lift synchronously through the two connecting rods (4); All the five pull rods (7) are screw rods, which are arranged vertically, and their lower ends sequentially pass through the through holes on the thrust blocks (6) and the pull rod through holes (9) to extend into the middle space of the support device. The lower end of each pull rod (7) is provided with a detachable pulling screw (8), and the pull rod (7) above each thrust block (6) is provided with a nut (11); The aperture of the through hole on the thrust block (6) through which the pull rod (7) passes is larger than the diameter of the pull rod (7) and smaller than the outer diameter of the nut (11), so that the nut (11) can press on the thrust block (6) to transmit the lifting force to the pull rod (7).

2. The disassembly device for the hydraulic end of a reciprocating five-plunger water pump according to claim 1, characterized in that, The pulling screw (8) is of a replaceable structure, and its end is provided with threads of various specifications to adapt to the internal threads of the shaft holes of different components to be disassembled.

3. The disassembly device for the hydraulic end of a reciprocating five-plunger water pump according to claim 1, characterized in that, The hydraulic oil circuit includes a synchronizing valve or a flow dividing and collecting valve, which is used to precisely control the flow rate and speed of the two hydraulic cylinders (10) to be consistent.

4. The disassembly device for the hydraulic end of a reciprocating five-plunger water pump according to claim 1, characterized in that, Reinforcing ribs (12) are arranged between the outer side wall of the vertical plate (2) and the base (1).

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