Auxiliary device for replacing piston rubber of slurry pump piston assembly

Abstract

The utility model relates to the technical field of slurry pump piston assembly maintenance, in particular to an auxiliary device for replacing piston rubber of a slurry pump piston assembly. Comprising an upper plate and a door frame, a through hole is formed in the middle of a straight part at the upper end of the door frame, supporting plates are slidably arranged at the upper end of the door frame on the two sides of the through hole, baffles are fixed to the upper end of the door frame on the outer sides of the supporting plates, adjusting screw rods are in threaded connection with the baffles, and the adjusting screw rods are rotatably connected with the supporting plates; the sliding plate is rotationally connected with an adjusting bolt in threaded connection with the upper end of the portal, two supports are arranged on the sliding plate in a sliding mode, vertical inserting rods are connected to the supports in a threaded mode, and the two supports are in threaded connection with the positive-negative lead screw. According to the auxiliary device, when the clamp spring is disassembled, the clamp spring can be limited through the baffle and the supporting plate, the clamp spring can be prevented from moving in the axial direction when the clamp spring is disassembled, and the clamp spring is convenient to disassemble.

Description

TECHNICAL FIELD

[0001] The utility model relates to a mud pump piston assembly maintenance technical field, concretely relates to a kind of auxiliary device for replacing the piston rubber of mud pump piston assembly. BACKGROUND

[0002] Mud pump piston assembly is one of the main parts of mud pump hydraulic end system, and is also one of the easily damaged parts in drilling work. Mud pump piston assembly is composed of piston core, piston rubber, snap spring, pressing sheet and the like. Among them, the piston rubber on the mud pump piston assembly is a consumable product. When the piston rubber wears to a certain extent, it cannot meet the needs and cannot be used continuously, so a new mud pump piston assembly needs to be replaced. However, purchasing more new mud pump piston assemblies will increase the cost of using mud pump piston assemblies, so people think of replacing new piston rubber to reuse mud pump piston assemblies to reduce the cost of using mud pump piston assemblies.

[0003] The patent document with publication number CN211681866U discloses an auxiliary device for replacing the piston rubber of mud pump piston assembly. When the snap spring clamped on the piston core shaft is removed, the mud pump piston assembly is first placed in the cavity, the pusher part is used to push the base into the cavity, the piston rubber and the pressing sheet are driven to move upward, the pressing sheet abuts against the blocking structure, the pusher part continues to elongate upward, the piston rubber is squeezed and elastically deformed, and a gap is formed between the pressing sheet and the snap spring and / or the snap spring. At this time, the piston rubber and the pressing sheet have no squeezing force on the snap spring, which facilitates the removal of the snap spring. After the pressing sheet and the piston rubber are squeezed downward, the snap spring needs to be removed manually using snap spring pliers. Since the snap spring is elastic, when the snap spring is removed, the two ends of the snap spring need to be moved away from each other to expand the snap spring in the radial direction. During the process of removing the snap spring using the snap spring pliers, the snap spring is easy to separate from the snap spring pliers, which is not convenient for removing the snap spring. UTILITY MODEL CONTENTS

[0004] The main purpose of the utility model is to provide an auxiliary device for replacing the piston rubber of mud pump piston assembly, which can facilitate the removal of the snap spring and improve the efficiency of rubber replacement.

[0005] To achieve the above purpose, the technical scheme provided by the utility model is as follows:

[0006] The utility model provides an auxiliary device for replacing the piston rubber of mud pump piston assembly, including the upper plate, the vertical direction of upper plate is provided with the inverted U shaped portal, the lower end of portal is connected with the lower end of upper plate through the drive unit, the straight portion of upper end of portal is centrally provided with the through -hole, the upper end of portal on both sides of through -hole is slidably arranged with the supporting plate, the upper end of portal on the outside of supporting plate is fixed with the baffle, the baffle between supporting plate and its one side forms the clamping cavity, the threaded connection of baffle is provided with the adjusting screw rod, the rotating connection of adjusting screw rod and supporting plate, the upper end of portal on the rear side of through -hole is slidably arranged with the sliding plate, the rotating connection of sliding plate and the adjusting bolt of threaded connection in the upper end of portal, the sliding plate is slidably arranged with two supports, the vertical plug rod is threadedly connected on the support, the positive and negative screw rod is threadedly connected with two supports, and the adjusting bolt is perpendicular to the positive and negative screw rod.

[0007] Specifically, the drive unit includes a vertically arranged telescopic rod, the upper end of the telescopic rod is fixedly connected with the lower end of the upper plate, and the lower end of the telescopic rod is fixedly connected with a connecting rod.

[0008] Specifically, the supporting plate includes a flat portion at the lower end and a vertical portion at the upper end, the flat portion of the supporting plate is slidably arranged in the flat groove at the upper end of the portal, the baffle includes a vertical portion at the lower end and a flat portion at the upper end, the vertical portion of the baffle is fixedly connected with the upper end of the portal, the flat portion of the baffle is located above the flat portion of the supporting plate, the adjusting screw rod is threadedly connected on the vertical portion of the baffle, and the adjusting screw rod is rotatably connected with the vertical portion of the supporting plate. After rotating the adjusting screw rod, the supporting plate can move in the radial direction of the through -hole.

[0009] Specifically, the upper end of the portal on the rear side of the through -hole is provided with a sliding groove, and the sliding plate is slidably arranged in the sliding groove. After rotating the adjusting bolt, the sliding plate can move in the radial direction of the through -hole in the sliding groove.

[0010] Specifically, the support includes a sliding block, the sliding block is slidably connected with the sliding plate, the front end of the sliding block is fixedly provided with a support plate, the plug rod is threadedly connected at the front end of the support plate, and the sliding blocks of the two supports are respectively threadedly connected with the threaded portions on both sides of the positive and negative screw rod.

[0011] Specifically, the positive and negative screw rod is concentrically fixed with a nut at the middle position.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1、When the auxiliary device is disassembled, the clamping spring can be limited by the baffle and the supporting plate, so that the axial movement of the clamping spring during disassembly can be avoided, and the clamping spring can be conveniently disassembled.

[0014] 2、The plug rod on the two supports causes the radial deformation of the clamping spring, and under the cooperation of the supporting plate and the baffle, the plug rod and the clamping spring can be prevented from being separated, so that the clamping spring pliers are not needed during disassembly. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic view of the auxiliary device.

[0016] Figure 2 It is Figure 1 It is an enlarged view of the A area in the middle.

[0017] Figure 3 It is a top view of the auxiliary device.

[0018] Figure 4 It is a schematic view after the compression ring and the snap spring are separated.

[0019] Figure 5 It is a schematic view after the snap spring is disassembled.

[0020] The names of the components in the drawings are: 1, upper plate, 2, portal, 3, connecting rod, 4, telescopic rod, 5, through hole, 6, supporting plate, 7, baffle, 8, adjusting screw, 9, sliding plate, 10, sliding block, 11, support plate, 12, insertion rod, 13, right and left screw, 14, sliding groove, 15, adjusting bolt, 16, base, 17, rubber, 18, compression ring, 19, snap spring, 20, mandrel. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below 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, not all the embodiments.

[0022] Embodiment one: refer to Figures 1-5 As shown in the figure, an auxiliary device for replacing the piston rubber of the piston assembly of a mud pump, comprising an upper plate 1, a portal 2 in inverted U shape is slidingly arranged in the vertical direction of the upper plate 1, and the lower end of the portal 2 is connected with the lower end of the upper plate 1 through a driving unit.

[0023] The driving unit comprises a telescopic rod 4 arranged vertically, the upper end of the telescopic rod 4 is fixedly connected with the lower end of the upper plate 1, the lower end of the telescopic rod 4 is fixedly connected with a connecting rod 3, and the connecting rod 3 is fixedly connected with the lower end of the portal 2.

[0024] Starting the telescopic rod 4, the portal 2 can move in the vertical direction of the upper plate 1.

[0025] A through hole 5 is centrally arranged on the flat part of the upper end of the portal 2, supporting plates 6 are slidingly arranged on both sides of the upper end of the portal 2, baffles 7 are fixedly arranged on the outer side of the upper end of the portal 2, a clamping cavity is formed between the supporting plate 6 and the baffle 7 on one side of the supporting plate 6, an adjusting screw 8 is threadedly connected on the baffle 7, and the adjusting screw 8 is rotationally connected with the supporting plate 6.

[0026] The supporting plate 6 comprises a flat part at the lower end and a vertical part at the upper end, and the flat part of the supporting plate 6 is slidingly arranged in a flat groove at the upper end of the portal 2.

[0027] The baffle 7 comprises a vertical part at the lower end and a flat part at the upper end, the vertical part of the baffle 7 is fixedly connected with the upper end of the door frame 2, and the flat part of the baffle 7 is located above the flat part of the supporting plate 6. The adjusting screw 8 is threadedly connected with the vertical part of the baffle 7, and the adjusting screw 8 is rotatably connected with the vertical part of the supporting plate 6. After the adjusting screw 8 is rotated, the supporting plate 6 can move along the radial direction of the through hole 5.

[0028] A sliding plate 9 is slidably arranged at the upper end of the door frame 2 at the rear side of the through hole 5, and the sliding plate 9 is rotatably connected with the adjusting bolt 15 threadedly connected with the upper end of the door frame 2. Specifically, a sliding groove 14 is formed at the upper end of the door frame 2 at the rear side of the through hole 5, the sliding plate 9 is slidably arranged in the sliding groove 14, and the sliding plate 9 can move in the sliding groove 14 along the radial direction of the through hole 5 after the adjusting bolt 15 is rotated.

[0029] Two supports are slidably arranged on the sliding plate 9, and a vertical inserting rod 12 is threadedly connected with each of the supports, the two supports are threadedly connected with the positive and negative screw rod 13, and the adjusting bolt 15 is perpendicular to the positive and negative screw rod 13.

[0030] The support comprises a sliding block 10, and the sliding block 10 is slidably connected with the sliding plate 9. A support plate 11 is fixedly arranged at the front end of the sliding block 10, and the inserting rod 12 is threadedly connected with the front end of the support plate 11. The sliding blocks 10 of the two supports are threadedly connected with the threaded parts on the two sides of the positive and negative screw rod 13, respectively.

[0031] When the rubber 17 needs to be replaced, the base 16 of the piston assembly is placed on the upper end of the upper plate 1, and the piston assembly is located in the door frame 2, the position of the piston assembly is adjusted so that the mandrel 20 of the piston assembly is concentric with the through hole 5. The piston assembly is rotated so that the holes at the two ends of the clasp spring 19 correspond to the two inserting rods 12 in the up-down direction and are concentric.

[0032] The telescopic rod 4 is started to make the door frame 2 descend, and the flat part at the upper end of the door frame 2 can extrude the compression ring 18 to descend, and the compression ring 18 can extrude the rubber 17 after descending. After the clasp spring 19 corresponds to the clamping cavity, the adjusting screw 8 is rotated to make the supporting plate 6 move towards the axis direction of the through hole 5, so that the flat part of the supporting plate 6 contacts the lower end of the clasp spring 19. At this time, the upper end of the clasp spring 19 contacts the lower end of the flat part of the baffle 7, and the two inserting rods 12 are respectively inserted into the holes at the two ends of the clasp spring 19.

[0033] Then the positive and negative screw rod 13 is rotated to make the two supports move away from each other, and the two inserting rods 12 on the two supports can make the clasp spring 19 expand in the radial direction when the two supports move away from each other.

[0034] After the radial expansion of the clamping spring 19, in order to enable the clamping spring 19 to be withdrawn as a whole from the clamping groove of the mandrel 20, the adjusting screw 15 is rotated, thereby enabling the slide plate 9, the bracket, the insertion rod 12 and the radially expanded clamping spring 19 to move forward and backward, and ensuring that the front side of the clamping spring 19 is withdrawn from the clamping groove of the mandrel 20.

[0035] After the clamping spring 19 is withdrawn as a whole from the clamping groove of the mandrel 20, the telescopic rod 4 is retracted, thereby enabling the door frame 2 to move upward, and when the flat portion at the upper end of the door frame 2 is higher than the upper end of the mandrel 20, the base 16, the mandrel 20, the rubber 17 and the compression ring 18 can be taken out of the door frame 2.

[0036] After the rubber 17 is replaced, the compression ring 18 is sleeved on the mandrel 20 at the upper end of the rubber 17, and then the base 16 is placed at the upper end of the upper plate 1, and the base 16, the mandrel 20, the rubber 17 and the compression ring 18 are located in the door frame 2, so that the mandrel 20 is concentric with the through hole 5.

[0037] The telescopic rod 4 is started, enabling the door frame 2 to move downward, and during the downward movement of the door frame 2, the flat portion at the upper end of the door frame 2 can press the compression ring 18 downward, and the compression ring 18 can press the rubber 17 after moving downward.

[0038] During the downward movement of the door frame 2, the mandrel 20 can penetrate the clamping spring 19 in the clamping cavity, and when the clamping spring 19 corresponds to the clamping groove of the mandrel 20, the right and left screw rods 13 are rotated, enabling the two brackets and the two insertion rods 12 to move close to each other, and when the clamping spring 19 is partially located in the clamping groove of the mandrel 20, the adjusting screw 8 is rotated to restore the support plate 6. During the subsequent upward movement of the door frame 2, since the clamping spring 19 is partially located in the clamping groove of the mandrel 20, the clamping spring 19 cannot move with the door frame 2, and the insertion rod 12 can gradually withdraw from the hole at the end of the clamping spring 19.

[0039] When the insertion rod 12 withdraws from the hole at the end of the clamping spring 19, the clamping spring 19 is restored and clamped in the clamping groove of the mandrel 20. After the door frame 2 is restored during the upward movement, the compression ring 18 is tightly abutted against the clamping spring 19 under the elastic force of the rubber 17, and then the piston assembly can be taken down.

[0040] When the clamping spring 19 is disassembled, the clamping spring 19 can be limited by the baffle 7 and the support plate 6, which can avoid the axial movement of the clamping spring 19 during disassembly, and facilitate the disassembly of the clamping spring 19. The radial deformation of the clamping spring 19 is caused by the insertion rod 12 on the two brackets, and under the cooperation of the support plate 6 and the baffle 7, the insertion rod 12 can be prevented from being separated from the clamping spring 19, and the clamping spring pliers are not needed during the disassembly of the clamping spring 19.

[0041] Example Two: Based on Example One, referring to Figure 5 The nut is concentrically fixed at the middle position of the right and left screw rods 13. By setting the nut, the rotation of the right and left screw rods 13 is facilitated.

[0042] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An auxiliary device for replacing the piston rubber of a mud pump piston assembly, comprising an upper plate (1), a door frame (2) in the shape of an inverted U is slidably arranged in the vertical direction of the upper plate (1), the lower end of the door frame (2) is connected with the lower end of the upper plate (1) through a driving unit, characterized in that, The straight part of the upper end of the portal frame (2) is centrally provided with a through hole (5), the upper end of the portal frame (2) on both sides of the through hole (5) is slidably provided with a supporting plate (6), the upper end of the portal frame (2) on the outer side of the supporting plate (6) is fixedly provided with a baffle (7), a clamping cavity is formed between the supporting plate (6) and the baffle (7) on one side of the supporting plate (6), the baffle (7) is threadedly connected with an adjusting screw rod (8), the adjusting screw rod (8) is rotatably connected with the supporting plate (6), the upper end of the portal frame (2) on the rear side of the through hole (5) is slidably provided with a sliding plate (9), the sliding plate (9) is rotatably connected with an adjusting screw bolt (15) threadedly connected with the upper end of the portal frame (2), the sliding plate (9) is slidably provided with two supports, the vertical insertion rods (12) are threadedly connected with the supports, the two supports are threadedly connected with a reversible lead screw (13), and the adjusting screw bolt (15) is perpendicular to the reversible lead screw (13).

2. An auxiliary device for replacing the rubber boot of a piston assembly of a mud pump according to claim 1, characterized in that, The driving unit comprises a vertically arranged telescopic rod (4), the upper end of the telescopic rod (4) is fixedly connected with the lower end of the upper plate (1), the lower end of the telescopic rod (4) is fixedly connected with the connecting rod (3), and the connecting rod (3) is fixedly connected with the lower end of the portal frame (2).

3. An auxiliary device for replacing the rubber boot of a slurry pump piston assembly as claimed in claim 1, wherein, The supporting plate (6) comprises a straight part at the lower end and a vertical part at the upper end, the straight part of the supporting plate (6) is slidably arranged in the flat groove at the upper end of the portal frame (2), the baffle (7) comprises a vertical part at the lower end and a straight part at the upper end, the vertical part of the baffle (7) is fixedly connected with the upper end of the portal frame (2), the straight part of the baffle (7) is located above the straight part of the supporting plate (6), the adjusting screw rod (8) is threadedly connected with the vertical part of the baffle (7), and the adjusting screw rod (8) is rotatably connected with the vertical part of the supporting plate (6). After the adjusting screw rod (8) is rotated, the supporting plate (6) can move in the radial direction of the through hole (5).

4. The auxiliary device for replacing the piston rubber of the piston assembly of the mud pump according to claim 1, characterized in that, The upper end of the portal frame (2) on the rear side of the through hole (5) is provided with a sliding groove (14), the sliding plate (9) is slidably arranged in the sliding groove (14), and the sliding plate (9) can move in the radial direction of the through hole (5) in the sliding groove (14) by rotating the adjusting screw bolt (15).

5. An auxiliary device for replacing the rubber boot of a slurry pump piston assembly as claimed in claim 1, wherein, The support comprises a sliding block (10), the sliding block (10) is slidably connected with the sliding plate (9), the support plate (11) is fixedly arranged at the front end of the sliding block (10), the insertion rod (12) is threadedly connected with the front end of the support plate (11), and the sliding blocks (10) of the two supports are respectively threadedly connected with the threaded portions on both sides of the reversible lead screw (13).

6. An auxiliary device for replacing the piston rubber of a mud pump piston assembly as claimed in claim 1, wherein, The reversible lead screw (13) is concentrically fixed with a nut at the middle position.

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