Electric reversing device for grouting pump

Abstract

The utility model discloses an electrical reversing device for a grouting pump, which comprises a first high-voltage proximity switch, a second high-voltage proximity switch and a relay, and the first high-voltage proximity switch and the second high-voltage proximity switch are both arranged in a hydraulic oil cavity. The first high-pressure proximity switch is arranged at the farthest end corresponding to the piston stroke of the hydraulic oil cavity, and the second high-pressure proximity switch is arranged at the nearest end corresponding to the piston stroke of the hydraulic oil cavity so as to detect the position of a piston of the hydraulic oil cavity; the relay is electrically connected with the first high-voltage proximity switch and the second high-voltage proximity switch, and the relay is electrically connected with a hydraulic valve of the grouting pump so as to receive electric signals of the first high-voltage proximity switch and the second high-voltage proximity switch and control the action of the hydraulic valve. According to the utility model, the impact noise when the grouting pump works can be reduced, so that the operation of the grouting pump is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of grouting engineering, in particular to an electrical reversing device for a grouting pump. Background Art

[0002] At present, grouting pumps are usually used for grouting and water blocking, filling gaps, and reinforcing broken rock layers in construction sites such as mines, tunnels, water conservancy, subways, buildings, and bridges. The grouting pump is mainly composed of a motor, a hydraulic pump, a hydraulic cylinder, a slurry cylinder, a reversing valve group, and a relief valve group. The principle is that the hydraulic pump drives the hydraulic cylinder to reciprocate, and the piston rod of the hydraulic cylinder is connected to the piston rod of the slurry chamber, thereby driving the piston of the slurry chamber to reciprocate, and driving the slurry cylinder to complete the slurry suction and discharge process.

[0003] Existing grouting pumps generally use a mechanical reversing device to switch the direction of grout suction and discharge, but this mechanical reversing device has defects such as high operating noise, high impact force, and easy damage.

[0004] Therefore, an electromagnetic reversing hydraulic grouting pump is proposed. The grouting pump uses a proximity switch to check the stroke of the hydraulic cylinder and controls the electromagnetic reversing valve through an intermediate relay to drive the hydraulic cylinder to reverse.

[0005] Chinese patent application 201821967388.2 discloses an electromagnetic reversing hydraulic grouting pump, including a hydraulic oil cylinder, a slurry cylinder is fixedly installed on the right side of the hydraulic oil cylinder, a hydraulic adjustment rod extending to the inside of the slurry cylinder is movably installed inside the hydraulic oil cylinder, a connecting plate is sleeved on the outer surface of the hydraulic adjustment rod, and sealing limit rings are fixedly installed on the left and right sides of the hydraulic adjustment rod and inside the hydraulic oil cylinder and the slurry cylinder. The electromagnetic reversing hydraulic grouting pump, by setting a proximity switch, and two distance sensors are located in the gap formed by the two proximity switches, so that the connection plate approaches the distance sensor under the transmission of the hydraulic adjustment rod, and the reversing effect of the electromagnetic reversing valve can be controlled through the transmission wire on the intermediate relay. By setting the distance sensor and the proximity switch eight millimeters apart, the equipment has a reaction space, avoiding the impact noise during work, and the equipment operation is more stable. However, the electromagnetic reversing hydraulic grouting pump disclosed in the patent application has the following defects: the proximity switch is arranged on the outside of the hydraulic cylinder, which is very easy to be damaged, and during on-site construction, it has strict requirements on the construction environment. Once it is contaminated with cement, the test failure is very likely to occur, making it difficult to carry out subsequent construction, and it is not suitable for on-site construction.

[0006] Therefore, providing an electrical reversing device for a grouting pump with a simple structure, a high degree of automation and stable operation has become an issue that urgently needs to be solved in the industry. Utility Model Content

[0007] In view of the above problems, one of the purposes of the utility model is to provide an electrical reversing device for a grouting pump, which can reduce the impact noise during operation and make the operation of the grouting pump more stable.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] The utility model provides an electrical reversing device for a grouting pump, the grouting pump comprising: a hydraulic oil chamber and a slurry chamber, the piston rod in the hydraulic oil chamber is connected to the piston rod of the slurry chamber to drive the piston in the slurry chamber to reciprocate, and is characterized in that the electrical reversing device comprises: a first high-voltage proximity switch, a second high-voltage proximity switch and a relay, wherein:

[0010] The first high-pressure proximity switch and the second high-pressure proximity switch are both arranged in the hydraulic oil chamber, the first high-pressure proximity switch is arranged at the farthest end of the piston stroke corresponding to the hydraulic oil chamber, and the second high-pressure proximity switch is arranged at the closest end of the piston stroke corresponding to the hydraulic oil chamber, and the first high-pressure proximity switch and the second high-pressure proximity switch are used to detect the position of the piston of the hydraulic oil chamber;

[0011] The relay is electrically connected to the first high-pressure proximity switch and the second high-pressure proximity switch, and the relay is electrically connected to the hydraulic valve of the grouting pump to receive electrical signals from the first high-pressure proximity switch and the second high-pressure proximity switch and control the action of the hydraulic valve.

[0012] In some embodiments, the hydraulic valve is a two-position four-way solenoid reversing valve or a three-position four-way solenoid reversing valve.

[0013] In some embodiments, the distance between the first high-voltage proximity switch and the second high-voltage proximity switch is set to 280-320 mm.

[0014] The utility model has at least the following beneficial effects: (1) the impact noise during operation is reduced, making the operation of the grouting pump more stable; (2) no impact occurs, the machine is not easily damaged, the production cost is low, and the service life is long; (3) the degree of automation control is high and the requirements for the construction environment are low. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the top cross-sectional assembly structure of a hydraulic oil chamber of a grouting pump using the electrical reversing device of the utility model is shown;

[0016] Figure 2 A schematic diagram of the main cross-sectional assembly structure of the hydraulic oil chamber of a grouting pump using the electrical reversing device of the utility model is shown;

[0017] Figure 3 Shown is a control principle diagram of a relay of the utility model;

[0018] Description of reference numerals:

[0019] 1-piston rod in the hydraulic oil chamber, 2-piston rod in the slurry chamber, 3-first high-pressure proximity switch, 4-second high-pressure proximity switch, 5-hydraulic valve, Y-hydraulic oil chamber, F-farthest end, N-nearest end. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional 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 system 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. In addition, the terms "first", "second", etc., are used to define components, only for the convenience of distinguishing the above components, and unless otherwise stated, the above terms have no special meaning and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] As a non-limiting embodiment, the grouting pump to which the electrical reversing device of the utility model is applicable includes: a hydraulic oil chamber and a slurry chamber, such as Figure 1 and Figure 2As shown, the piston rod 1 in the hydraulic oil chamber Y is connected to the piston rod 2 of the slurry chamber, so that the piston in the slurry chamber can be driven to reciprocate. The electrical reversing device includes: a first high-voltage proximity switch 3, a second high-voltage proximity switch 4 and a relay (not shown in the figure). In order to prevent the first high-voltage proximity switch 3 and the second high-voltage proximity switch 4 from contacting cement and other materials at the construction site, the first high-voltage proximity switch 3 and the second high-voltage proximity switch 4 are both arranged in the hydraulic oil chamber Y. In order to accurately monitor the position of the piston in the hydraulic oil chamber Y, the first high-voltage proximity switch 3 is arranged at the farthest end F of the piston stroke corresponding to the hydraulic oil chamber, and the second high-voltage proximity switch is arranged at the closest end N of the piston stroke corresponding to the hydraulic oil chamber.

[0024] The relay is arranged in the power distribution cabinet, and is electrically connected to the first high-voltage proximity switch 3 and the second high-voltage proximity switch 4 through electric wires. The relay is also electrically connected to the hydraulic valve 5 of the grouting pump.

[0025] In this non-limiting embodiment, the hydraulic valve 5 is a two-position four-way electromagnetic reversing valve, and its principle is as follows Figure 3 As shown, it is controlled to be switched by a relay. Specifically, the relay controls the electromagnetic coil of the hydraulic valve 5 to achieve switching.

[0026] It can be seen that the utility model uses the first high-pressure proximity switch 3 and the second high-pressure proximity switch 4 to detect the position of the cylinder piston 6. When the cylinder piston 6 is pushed to the end of the stroke, that is, when it reaches F, the first high-pressure proximity switch 3 will detect it, and the first proximity switch 3 will give the relay an electrical signal, the relay will be activated, and the hydraulic valve 5 will be controlled to act, thereby realizing the reversal of the hydraulic cylinder, and then driving the piston of the slurry chamber to move. When the cylinder piston 6 retreats to the end of the stroke, that is, when it reaches N, the second high-pressure proximity switch 4 will detect it, and the second proximity switch 4 will give the relay an electrical signal, the relay will be activated, and the hydraulic valve 5 will be controlled to act, thereby realizing the reversal of the hydraulic cylinder again, and then driving the piston of the slurry chamber to move, thereby realizing the switching of suction and discharge of slurry.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An electrical reversing device for a grouting pump, the grouting pump comprising: The hydraulic oil chamber and the slurry chamber, the piston rod in the hydraulic oil chamber is connected to the piston rod of the slurry chamber to drive the piston in the slurry chamber to reciprocate, characterized in that the electrical reversing device includes: a first high-voltage proximity switch, a second high-voltage proximity switch and a relay, wherein, The first high-pressure proximity switch and the second high-pressure proximity switch are both arranged in the hydraulic oil chamber, the first high-pressure proximity switch is arranged at the farthest end of the piston stroke corresponding to the hydraulic oil chamber, and the second high-pressure proximity switch is arranged at the closest end of the piston stroke corresponding to the hydraulic oil chamber, and the first high-pressure proximity switch and the second high-pressure proximity switch are used to detect the position of the piston of the hydraulic oil chamber; The relay is electrically connected to the first high-pressure proximity switch and the second high-pressure proximity switch, and the relay is electrically connected to the hydraulic valve of the grouting pump to receive electrical signals from the first high-pressure proximity switch and the second high-pressure proximity switch and control the action of the hydraulic valve.

2. The electrical reversing device for a grouting pump according to claim 1, characterized in that: The hydraulic valve is a two-position four-way electromagnetic reversing valve or a three-position four-way electromagnetic reversing valve.

3. The electrical reversing device for a grouting pump according to claim 1, characterized in that: The distance between the first high-voltage proximity switch and the second high-voltage proximity switch is set to 280 to 320 mm.

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