Four-plunger double-liquid synchronous grouting pump body structure

Abstract

The utility model relates to a four-plunger double-liquid synchronous grouting pump body structure which comprises an oil cylinder, connecting boxes and plunger cylinders, first flanges are arranged at the left end and the right end of the oil cylinder, the two ends of the oil cylinder are fixedly connected with an end cover at one end of one connecting box through the first flanges in cooperation with fasteners, and second flanges are arranged at the other ends of the connecting boxes. The surface of each second flange is connected with two plunger type cylinders, the outer sides of the two plunger type cylinders are sleeved with a fixing plate, and the fixing plate is fixedly connected with the second flanges through a plurality of horizontally-arranged fasteners. The oil cylinder and the connecting box as well as the connecting box and the plunger type cylinder are separately connected and fixed through the flanges and the fasteners, so that the overall structural strength of the pump body is improved, the connecting structures among the components are not easy to loosen, and the problem of oil leakage of the oil cylinder caused by looseness of individual bolts is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of grouting pumps, and in particular relates to a four-plunger double-liquid synchronous grouting pump body structure. Background Art

[0002] Grouting pumps use compressed oil or compressed air as their power source. The large effective area ratio between the oil or air cylinder and the grouting cylinder allows the cylinder to generate high injection pressure with relatively low pressure. Chinese patent document CN202123195024.1 discloses a four-plunger synchronous grouting pump mechanism. In this application, the oil cylinder, its connecting box at both ends, and the two plunger cylinders are secured by four long outer screws. The ends of the long screws engage nuts with the cylinder head flange, allowing the components to press against each other and form a single unit under the tension of the tie rods. However, in actual use, the long screw connections are unstable. Once the nuts on the long screws loosen, gaps will form between the various components of the grouting pump, leading to slurry leakage. Furthermore, when the grouting pump is repaired, the entire oil cylinder may come apart, causing the hydraulic oil inside to leak. In this application, the piston rod is connected to the two plungers by a connecting block and bolts. This connection structure is not only relatively cumbersome during installation, but the bolts are also prone to loosening after long-term use. Therefore, it is necessary for those skilled in the art to make improvements to the existing problems. Utility Model Content

[0003] In response to the above problems, the utility model discloses a four-plunger dual-liquid synchronous grouting pump body structure, in which the components are directly connected and fixed by bolts and flanges, solving the problem of the pump body being easily loosened when long screws are used for connection and fixation in the prior art.

[0004] The specific technical solutions are as follows:

[0005] A four-plunger dual-liquid synchronous grouting pump body structure includes an oil cylinder, a connecting box, and a plunger cylinder. First flanges are provided at both ends of the oil cylinder, and both ends of the oil cylinder are fixedly connected to the end cover of one end of a connecting box through the first flange and fasteners. The other end of the connecting box is provided with a second flange, and the surface of each second flange is connected to two plunger cylinders respectively. A fixing plate is provided on the outer side of the two plunger cylinders, and the fixing plate is fixedly connected to the second flange by a plurality of horizontally arranged fasteners.

[0006] A piston rod is provided in the oil cylinder, and both ends of the piston rod extend into two connecting boxes respectively. Connecting shafts are provided at the ends of both ends of the piston rod. The connecting shafts are fixedly connected to the plunger rods in the two plunger cylinders respectively through connecting sleeves and connecting plates. The two ends of the connecting plate are fixedly connected to the ends of the two plunger rods respectively. A docking shaft is provided at the center of one side of the connecting plate. The docking shaft and the connecting shaft are connected and fixed by the connecting sleeve. The left and right ends of the connecting sleeve are respectively sleeved on the docking shaft and the connecting shaft to realize the connection and fixation between the piston rod and the plunger rod.

[0007] Preferably, the connecting sleeve includes two semicircular hoop kits, each of which has a receiving groove on its inner side. The two hoop kits are mounted at the connection between the connecting shaft and the docking shaft and are connected and fixed by fasteners, and the connecting sleeve is located at both ends of the receiving groove to form a bayonet. The connecting shaft and the docking shaft are located at the two bayonet positions and are respectively provided with a bayonet groove adapted to the bayonet, thereby realizing the connection and fixation between the connecting sleeve and the connecting plate and the piston rod.

[0008] Preferably, both sides of the two hoop kits are threadedly connected and fixed by bolts passing through them.

[0009] Preferably, the outer surface of the plunger cylinder is provided with a circle of step grooves, and the fixing plate is provided with a through-opening adapted to the step grooves. The fixing plate is sleeved on the step grooves of the plunger cylinder through the through-opening, so that one side of the fixing plate is pressed against the step grooves under the action of the fasteners to achieve fixation between the plunger cylinder and the connecting box.

[0010] Preferably, the lower ends of the two second flanges are respectively fixedly connected to a support base via fasteners.

[0011] Preferably, the end surface of the docking shaft is provided with a slot for accommodating the connecting shaft, so as to achieve insertion and positioning between the docking shaft and the connecting shaft.

[0012] The beneficial effects of the present invention are as follows:

[0013] (1) Compared with the prior art, the oil cylinder and the connecting box, as well as the connecting box and the plunger cylinder of the utility model, are individually connected and fixed by flanges and fasteners, so that they form a set of grouting pump as a whole, thereby improving the overall structural strength of the pump body, and the connection structure between the various components is not easy to loosen, effectively avoiding the problem of oil cylinder leakage caused by loosening of individual bolts.

[0014] (2) The piston rod and the plunger rod of the utility model are connected and fixed by a connecting sleeve and a connecting plate. The connecting sleeve fixes the connecting shaft and the docking shaft by means of a bayonet connection, which makes installation and disassembly more convenient and less likely to loosen.

[0015] (3) Compared with the prior art which uses a whole base plate welded to the pump body as a support base, the present invention fixes the support base at the bottom of the two connection boxes through flanges, so that the support base can be connected and fixed to the base plate through fasteners for easy disassembly and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the present utility model.

[0017] Figure 2 It is the main view of the present utility model.

[0018] Figure 3 It is a side view of the present utility model.

[0019] Figure 4 This is a new cross-sectional view of the present invention.

[0020] Figure 5 for Figure 4 Enlarged schematic diagram of point A in the middle.

[0021] Figure 6 It is a structural schematic diagram of the connecting sleeve in the utility model.

[0022] Explanation of the accompanying drawings: oil cylinder 1, first flange 11, piston rod 12, connecting shaft 13, slot 131, connecting box 2, second flange 21, end cover 22, plunger cylinder 3, step groove 301, plunger rod 31, fixing plate 32, through port 321, short screw 322, connecting sleeve 4, hoop kit 41, accommodating groove 411, bayonet 412, connecting plate 5, docking shaft 51, slot 511, support base 6. DETAILED DESCRIPTION

[0023] To make the technical solution of the present invention clearer and more specific, the present invention is further described below with reference to the accompanying drawings. Any equivalent replacement of the technical features of the present invention and any solution derived from conventional reasoning shall fall within the scope of protection of the present invention. The fixed connections and fixed arrangements mentioned in the present invention are all common connection methods in the mechanical field, including welding, bolt and nut connections, and screw connections.

[0024] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] See also Figure 1-6 The present embodiment provides a four-plunger dual-liquid synchronous grouting pump structure, including an oil cylinder 1, a connecting box 2, and a plunger cylinder 3. The left and right ends of the oil cylinder 1 are respectively provided with a first flange 11, and the two ends of the oil cylinder 1 are respectively fixedly connected to the end cover 22 at one end of a connecting box 2 through the first flange 11 and fasteners. The other end of the connecting box 2 is provided with a second flange 21. The surface of each second flange 21 is respectively connected to two plunger cylinders 3. The outer surface of the two plunger cylinders 3 is provided with a circle of step groove 301. The two plunger cylinders 3 A rectangular fixing plate 32 is sleeved on the outer side, and a through hole 321 is opened on the fixing plate 32 to match the step groove 301. The fixing plate 32 is sleeved on the step groove 301 on the plunger cylinder 3 through the through hole 321. A number of horizontally arranged short screws 322 are provided on the fixing plate 32, and one end of the short screw 322 is threadedly connected to the second flange 21, so that one side of the fixing plate 32 is pressed against the step groove 301 under the action of the fastener, thereby realizing the fixation between the two plunger cylinders 3 and the connection box 2.

[0026] The oil cylinder 1 and the connecting box 2 as well as the connecting box 2 and the plunger cylinder 3 are connected and fixed by flanges and fasteners, so as to form a set of grouting pump as a whole, thereby improving the overall structural strength of the pump body and avoiding the problem of loosening of the pump body due to loosening of a long screw.

[0027] A piston rod 12 is provided in the oil cylinder 1, and both ends of the piston rod 12 extend into the two connecting boxes 2 respectively. Connecting shafts 13 are provided at the ends of the two end portions of the piston rod 12. The connecting shafts 13 are fixedly connected to the plunger rods 31 in the two plunger cylinders 3 through the connecting sleeves 4 and the connecting plates 5. The two ends of the connecting plate 5 are respectively sleeved on the ends of the two plunger rods 31 and fixedly connected through nuts. A docking shaft 51 is provided at the center of one side of the connecting plate 5. The docking shaft 51 and the connecting shaft 13 are connected and fixed by the connecting sleeve 4. The left and right ends of the connecting sleeve 4 are respectively sleeved on the docking shaft 51 and the connecting shaft 13 to realize the connection and fixation between the piston rod 12 and the plunger rod 31.

[0028] In this embodiment, the connecting sleeve 4 includes two semicircular hoop kits 41, and the two sides of the two hoop kits 41 are respectively threaded and fixed by bolts, which makes installation and disassembly more convenient. The inner side of the hoop kit 41 is provided with a accommodating groove 411. The two hoop kits 41 are sleeved at the connection between the connecting shaft 13 and the docking shaft 51 and are connected and fixed by fasteners, so that the ends of the docking shaft 51 and the connecting shaft 13 are located in the accommodating groove 411, and the connecting sleeve 4 is located at both ends of the accommodating groove 411 to form a bayonet 412, and the connecting shaft 13 and the docking shaft 51 are respectively provided with a bayonet 131 adapted to the bayonet 412 at the positions of the two bayonet 412, thereby realizing the connection and fixation between the connecting sleeve 4 and the connecting plate 5 and the piston rod 12.

[0029] In this embodiment, the lower ends of the two second flanges 21 are fixedly connected to the support base 6 through fasteners. The support base 6 can be connected and fixed to the bottom plate through the fasteners without welding, which is convenient for disassembly and transportation.

[0030] In this embodiment, a slot 511 is provided on the end face of the docking shaft 51 for accommodating the connecting shaft 13, thereby realizing the insertion and positioning between the docking shaft 51 and the connecting shaft 13, improving the radial limiting capacity between the docking shaft 51 and the connecting shaft 13, and ensuring the connection stability between the piston rod 12 and the connecting plate 5.

[0031] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A four-plunger dual-liquid synchronous grouting pump body structure, comprising an oil cylinder (1), a connection box (2), and a plunger cylinder (3), characterized in that: The left and right ends of the oil cylinder (1) are provided with first flanges (11), and the two ends of the oil cylinder (1) are fixedly connected to the end cover (22) at one end of a connection box (2) through the first flanges (11) and fasteners. The other end of the connection box (2) is provided with a second flange (21), and the surface of each second flange (21) is connected to two plunger cylinders (3). A fixing plate (32) is provided on the outer side of the two plunger cylinders (3), and the fixing plate (32) is fixedly connected to the second flange (21) through a plurality of horizontally arranged fasteners. The oil cylinder (1) is provided with a piston rod (12), and both ends of the piston rod (12) extend into the two connecting boxes (2) respectively. The ends of the piston rod (12) are provided with connecting shafts (13). The connecting shafts (13) are fixedly connected to the plunger rods (31) in the two plunger cylinders (3) through the connecting sleeve (4) and the connecting plate (5). The two ends of the connecting plate (5) are fixedly connected to the ends of the two plunger rods (31) respectively. A docking shaft (51) is provided at the center of one side of the connecting plate (5). The docking shaft (51) and the connecting shaft (13) are connected and fixed by the connecting sleeve (4). The left and right ends of the connecting sleeve (4) are respectively sleeved on the docking shaft (51) and the connecting shaft (13) to achieve the connection and fixation between the piston rod (12) and the plunger rod (31).

2. A four-plunger dual-liquid synchronous grouting pump structure according to claim 1, characterized in that: The connecting sleeve (4) comprises two semicircular hoop sets (41), each of which is provided with a receiving groove (411) on its inner side. The two hoop sets (41) are sleeved at the connection between the connecting shaft (13) and the docking shaft (51) and are connected and fixed by fasteners, so that the connecting sleeve (4) is located at both ends of the receiving groove (411) to form a bayonet (412), and the connecting shaft (13) and the docking shaft (51) are respectively provided with a bayonet (131) adapted to the bayonet (412) at the positions of the two bayonet (412), thereby realizing the connection and fixation between the connecting sleeve (4) and the connecting plate (5) and the piston rod (12).

3. A four-plunger dual-liquid synchronous grouting pump structure as claimed in claim 2, characterized in that: The two sides of the two hoop sets (41) are respectively penetrated by bolts to achieve threaded connection and fixation.

4. A four-plunger dual-liquid synchronous grouting pump structure according to claim 1, characterized in that: The outer surface of the plunger cylinder (3) is provided with a circle of step grooves (301), and a through-hole (321) adapted to the step groove (301) is opened on the fixing plate (32). The fixing plate (32) is sleeved on the step groove (301) of the plunger cylinder (3) through the through-hole (321), so that one side of the fixing plate (32) is pressed against the step groove (301) under the action of the fastener, thereby achieving fixation between the plunger cylinder (3) and the connection box (2).

5. A four-plunger dual-liquid synchronous grouting pump structure according to claim 1, characterized in that: The lower ends of the two second flanges (21) are respectively fixedly connected to a support base (6) via fasteners.

6. A four-plunger dual-liquid synchronous grouting pump structure according to claim 1, characterized in that: The end surface of the docking shaft (51) is provided with a slot (511) for accommodating the connecting shaft (13), thereby achieving insertion and positioning between the docking shaft (51) and the connecting shaft (13).

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