Gas circuit control system of high-low pressure diaphragm pump

Abstract

The utility model relates to the technical field of high-pressure grouting machines, and provides a gas circuit control system of a high-low pressure diaphragm pump. The pressure increasing valve is connected with the feeding pipe in parallel; the feeding pipe and the pressure increasing valve are both connected with the diaphragm pump in series. By means of the technical scheme, the problems that in the prior art, a high-pressure grouting machine cannot independently adjust the working pressure of each station, and the pressure difference during high-pressure and low-pressure switching may damage a mold are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure grouting machines, and in particular to an air circuit control system of high- and low-pressure diaphragm pumps. Background Art

[0002] High-pressure grouting machine is a professional machine used for high-pressure grouting of structures. It has ultra-high pressure and does not require an air pressure source. It is environmentally friendly, portable, efficient and safe. It can reach a working pressure of 0-50Mpa within a few seconds. It is mainly used for plugging and sealing leaks in various buildings and underground concrete.

[0003] At present, the mold grouting of the high-pressure grouting machine is completed in the form of separate low-pressure grouting and high-pressure grouting, that is, the low-pressure grouting is completed by one device, and the high-pressure grouting is completed by another device. Especially for multi-station grouting machines, all stations share the same system, so the working pressure of each station cannot be adjusted individually, resulting in low grouting adjustment efficiency and inability to adapt to various occasions. In addition, when switching from low-pressure grouting to high-pressure grouting, the pressure is nonlinearly increased, that is, the pressure difference between low-pressure grouting and high-pressure grouting is large. Such sudden pressure changes will damage the life of the mold, which results in increased use costs. Utility Model Content

[0004] The utility model provides an air circuit control system for high and low pressure diaphragm pumps, which solves the problem in the related art that the high pressure grouting machine cannot adjust the working pressure of each station individually and the pressure difference during high and low pressure switching may damage the mold.

[0005] The technical solution of the utility model is as follows:

[0006] A gas circuit control system for a high- and low-pressure diaphragm pump, comprising:

[0007] Feed pipe;

[0008] A boost valve, the boost valve is connected in parallel with the feed pipe;

[0009] A diaphragm pump, the feed pipe and the boost valve are connected in series with the diaphragm pump.

[0010] As a further technical solution, it also includes:

[0011] An electrical proportional valve, the feed pipe and the boost valve are both connected in series with the electrical proportional valve.

[0012] As a further technical solution, the feed pipe is a low-pressure pipeline, and further comprises:

[0013] A high-pressure pipeline is connected in parallel with the feed pipe, and the boost valve is arranged on the high-pressure pipeline.

[0014] As a further technical solution, it also includes:

[0015] The end pipe and the tail pipe are connected in sequence. The electric proportional valve is arranged on the end pipe, and the diaphragm pump is connected in series with the tail pipe.

[0016] As a further technical solution, it also includes:

[0017] A one-way valve is arranged on the feed pipe.

[0018] As a further technical solution, it also includes:

[0019] Two single air-controlled two-way valves are respectively arranged on the feed pipe and the high-pressure pipeline, and are used to control the conduction state of the pipeline. One of the single air-controlled two-way valves is located between the electrical proportional valve and the one-way valve, and the other single air-controlled two-way valve is located between the electrical proportional valve and the boost valve.

[0020] As a further technical solution, the single air-controlled two-way valve has a first control interface and further includes:

[0021] A first control pipeline and a solenoid valve, wherein the solenoid valve has a control end, a first control port and a second control port, one end of the first control pipeline is connected to the end pipe, and the other end is connected to the control end;

[0022] A second control pipeline and a third control pipeline, one end of the second control pipeline is connected to the first control port, and the other end is connected to the first control interface of one of the single air-controlled two-way valves, and one end of the third control pipeline is connected to the second control port, and the other end is connected to the first control interface of another single air-controlled two-way valve.

[0023] As a further technical solution, it also includes:

[0024] An air-controlled valve, the air-controlled valve being arranged on the high-pressure pipeline, the air-controlled valve being located between the booster valve and the diaphragm pump, and the air-controlled valve having a second control interface;

[0025] A fourth control pipeline, one end of which is communicated with the high-pressure pipeline, and the other end of which is communicated with the second control interface, and the fourth control pipeline is connected in parallel with the boost valve.

[0026] The working principle and beneficial effects of the utility model are:

[0027] In the utility model, in order to avoid the high and low pressure switching of the traditional multi-station high-pressure grouting machine, which is prone to damage to the mold, because all stations share a system, the nonlinear pressure increase of the high and low pressure switching is inevitable, so the high and low pressure switching gas circuit method is simplified. This circuit can be used on high-pressure grouting machines with different numbers of stations, and can realize the separate grouting work of each station of the multi-station molding machine. The output air pressure of each station can be adjusted separately to realize the separate adjustment of the grouting pressure of each station in the multi-station unit, so as to realize the different requirements of different blanks and molds for grouting pressure.

[0028] This solution uses a booster valve connected in parallel with a low-pressure feed pipe to achieve high- and low-pressure switching, and ultimately outputs slurries of different pressures to the mold through a diaphragm pump to complete the embryo molding process. When low-pressure grouting is required, the pipeline conduction state of the parallel booster valve is cut off, and the slurry is pumped into the mold at low pressure through the feed pipe and the diaphragm pump; when high-pressure grouting is required, the conduction state of the low-pressure feed pipe in series with the diaphragm pump is cut off, and the slurry is pumped into the mold under the action of the diaphragm pump after secondary pressurization by the compressed air booster valve connected in parallel with the feed pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0030] Figure 1 This is a schematic diagram of an air circuit control system of a high and low pressure diaphragm pump in the utility model;

[0031] In the figure: 1, feed pipe, 2, boost valve, 3, diaphragm pump, 4, electric proportional valve, 5, high-pressure pipeline, 6, end pipe, 7, tail pipe, 8, one-way valve, 9, single air-controlled two-way valve, 901, first control interface, 10, first control pipeline, 11, solenoid valve, 1101, control end, 1102, first control port, 1103, second control port, 12, second control pipeline, 13, third control pipeline, 14, air-controlled valve, 1401, second control interface, 15, fourth control pipeline. DETAILED DESCRIPTION

[0032] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0033] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0034] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 this utility model can be understood according to specific circumstances.

[0035] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0036] Reference Figure 1 , which is the first embodiment of the utility model, proposes a gas circuit control system for high and low pressure diaphragm pumps, including:

[0037] Feed pipe 1;

[0038] A boost valve 2, the boost valve 2 is connected in parallel with the feed pipe 1;

[0039] The diaphragm pump 3, the feed pipe 1 and the boost valve 2 are all connected in series with the diaphragm pump 3.

[0040] In this embodiment, in order to avoid the high and low pressure switching of the traditional multi-station high-pressure grouting machine, which is prone to damage to the mold, because all stations share a system, the nonlinear pressure increase of the high and low pressure switching is inevitable, so the high and low pressure switching gas circuit method is simplified. This circuit can be used on high-pressure grouting machines with different numbers of stations, and can realize the separate grouting work of each station of the multi-station molding machine. The output air pressure of each station can be adjusted separately to realize the separate adjustment of the grouting pressure of each station in the multi-station unit, so as to realize the different requirements of different blanks and molds for grouting pressure.

[0041] This solution utilizes the booster valve 2 connected in parallel with the low-pressure feed pipe 1 to achieve high-low pressure switching, and finally outputs slurries of different pressures to the mold through the diaphragm pump 3 to complete the embryo molding process. When low-pressure grouting is required, the pipeline conduction state of the parallel booster valve 2 is cut off, and the slurry is injected into the mold in a low-pressure state through the feed pipe 1 and the diaphragm pump 3; when high-pressure grouting is required, the conduction state of the low-pressure feed pipe 1 in series with the diaphragm pump 3 is cut off, and the slurry is pressurized for the second time by the compressed air booster valve 2 connected in parallel with the feed pipe 1, and then injected into the mold under the action of the diaphragm pump 3.

[0042] Furthermore, it also includes:

[0043] The electric proportional valve 4, the feed pipe 1 and the boost valve 2 are both connected in series with the electric proportional valve.

[0044] In this embodiment, an electric proportional valve 4 is installed. Compared with the prior art, the electric proportional valve 4 is controlled by an electric signal, has a fast response speed, and can automatically adjust the pressure of high-pressure grouting and low-pressure grouting according to the set value, so that the grouting pressure of each workstation is stable, and the equipment efficiency and mold life are greatly improved. The principle is simple and clear, and it is easy to connect to the automatic control system. The pressure is automatically adjusted without human intervention.

[0045] At the same time, both the low-pressure grouting pressure and the high-pressure grouting pressure can be adjusted steplessly through the electrical proportional valve 4, and the grouting pressure can be increased in a curve, thereby improving the service life of the mold and the yield rate of the green body.

[0046] It is installed at the head end of the feed pipe 1 to initially adjust the pressure of the slurry steplessly to prevent the entire air system from being unusable due to the inability to combine with the function of the parallel compressed air booster valve 2.

[0047] Furthermore, the feed pipe 1 is a low-pressure pipeline, and further comprises:

[0048] A high-pressure pipeline 5 is connected in parallel with the feed pipe 1 , and the boost valve 2 is arranged on the high-pressure pipeline 5 .

[0049] In this embodiment, the high-pressure pipeline 5 connected in parallel with the feed pipe 1 is refined, and the compressed air boosting valve 2 is specifically set on the high-pressure pipeline 5. The boosting valve 2 is used to increase the pressure of the slurry in the high-pressure pipeline 5, and it is limited to low-pressure slurry flowing in the feed pipe 1 connected in series with the diaphragm pump 3.

[0050] Furthermore, it also includes:

[0051] The end pipe 6 and the tail pipe 7, the end pipe 6, the feed pipe 1 and the tail pipe 7 are connected in sequence, the electrical proportional valve 4 is arranged on the end pipe 6, and the diaphragm pump 3 is connected in series with the tail pipe 7.

[0052] In this embodiment, each pipeline in the system is refined, and an end pipe 6 and a tail pipe 7 are installed. The end pipe 6, the feed pipe 1 and the tail pipe 7 are connected in sequence. Specifically, the electric proportional valve 4 is arranged on the end pipe 6, and the diaphragm pump 3 is connected in series with the tail pipe 7.

[0053] Furthermore, it also includes:

[0054] A one-way valve 8 is provided on the feed pipe 1 .

[0055] In this embodiment, a one-way valve 8 is installed on the feed pipe 1, which can make the feed pipe 1 flow smoothly in the direction of the diaphragm pump 3, but will block the reverse flow, such as the backflow from the diaphragm pump 3 or the high-pressure pipeline 5 to the feed pipe 1, which is used for secondary protection of the electric proportional valve 4 to prevent damage to the electric proportional valve 4 and extend the service life of the electric proportional valve 4. This is because when switching to the high-pressure pipeline 5 to transport the slurry, once the high-pressure air flows back into the low-pressure feed pipe 1, it will damage the electric proportional valve 4 on the end pipe 6.

[0056] Furthermore, it also includes:

[0057] Two single air-controlled two-way valves 9 are respectively arranged on the feed pipe 1 and the high-pressure pipeline 5, and are used to control the conduction state of the pipeline. One of the single air-controlled two-way valves 9 is located between the electrical proportional valve 4 and the one-way valve 8, and the other single air-controlled two-way valve 9 is located between the electrical proportional valve 4 and the boost valve 2.

[0058] Furthermore, the single gas-controlled two-way valve 9 has a first control interface 901, and further includes:

[0059] A first control pipeline 10 and a solenoid valve 11, wherein the solenoid valve 11 has a control end 1101, a first control port 1102 and a second control port 1103, wherein one end of the first control pipeline 10 is connected to the end pipe 6, and the other end is connected to the control end 1101;

[0060] The second control pipeline 12 and the third control pipeline 13, one end of the second control pipeline 12 is connected to the first control port 1102, and the other end is connected to the first control interface 901 of one of the single air-controlled two-way valves 9, and one end of the third control pipeline 13 is connected to the second control port 1103, and the other end is connected to the first control interface 901 of another single air-controlled two-way valve 9.

[0061] Furthermore, it also includes:

[0062] An air-controlled valve 14, wherein the air-controlled valve 14 is disposed on the high-pressure pipeline 5, the air-controlled valve 14 is located between the booster valve 2 and the diaphragm pump 3, and the air-controlled valve 14 has a second control interface 1401;

[0063] A fourth control pipeline 15 , one end of which is in communication with the high-pressure pipeline 5 , and the other end of which is in communication with the second control interface 1401 , and the fourth control pipeline 15 is connected in parallel with the boost valve 2 .

[0064] In this embodiment, in order to further improve the accuracy level of the entire air circuit system and realize automatic adjustment of air pressure, a single air-controlled two-way valve 9 whose conduction state is controlled by an electromagnetic valve 11 is respectively installed on the high-pressure and low-pressure pipelines, namely, the feed pipe 1 and the high-pressure pipeline 5. At the same time, an air-controlled valve 14 is also installed on the high-pressure pipeline 5 between the booster valve 2 and the diaphragm pump 3, which effectively solves the cost problem of high and low pressure grouting. It has a simple structure and low cost, and effectively solves the problem of requiring multiple grouting pressures in a multi-station grouting machine, thereby improving the service life of the mold and the yield rate of the blank, and reducing the production cost.

[0065] Working principle of the whole gas circuit system: when the control end 1101 and the first control port 1102 of the solenoid valve 11 are energized, the air pressure in the feed pipe 1 will be introduced into the first control interface 901 of one of the single gas-controlled two-way valves 9 along the first control pipeline 10 and the second control pipeline 12, so that the feed pipe 1 is switched to the conducting state, and the inside of the feed pipe 1 can flow smoothly. At the same time, the electrical proportional valve 4 outputs the low-pressure grouting pressure, which is supplied to the diaphragm pump 3 through the one-way valve 8, and the high-low injection diaphragm pump 3 outputs the low-pressure mud to supply the mold;

[0066] When the low-pressure grouting is completed, the first control port 1102 loses power, and the above-mentioned single air-controlled two-way valve 9 switches to a closed state. At the same time, the control end 1101 and the second control port 1103 are energized. At this time, the air pressure in the feed pipe 1 will be introduced along the first control pipeline 10 and the third control pipeline 13 to the first control interface 901 of another single air-controlled two-way valve 9, so that the high-pressure pipeline 5 is switched to a conducting state. At the same time, the electrical proportional valve 4 is steplessly adjusted and outputs high-pressure grouting pressure. Then, under the action of high pressure, it will also act on the second control interface 1401 of the fourth control pipeline 15 along the fourth control pipeline 15 in parallel with the speed increasing valve, so that the air-controlled valve 14 switches to a conducting state. Then, the high-pressure grouting is supplied to the diaphragm pump 3 under the secondary pressurization of the speed increasing valve, and finally the high-pressure mud is supplied to the mold to complete the high-pressure injection process of the blank.

[0067] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A gas circuit control system for a high and low pressure diaphragm pump, characterized in that: include: Feed pipe (1); A boost valve (2), the boost valve (2) being connected in parallel with the feed pipe (1); A diaphragm pump (3), the feed pipe (1) and the booster valve (2) are both connected in series with the diaphragm pump (3).

2. The air circuit control system of a high and low pressure diaphragm pump according to claim 1, characterized in that: Also includes: An electric proportional valve (4), the feed pipe (1) and the boost valve (2) are both connected in series with the electric proportional valve.

3. The air circuit control system of a high and low pressure diaphragm pump according to claim 2, characterized in that: The feed pipe (1) is a low-pressure pipeline and further comprises: A high-pressure pipeline (5), the high-pressure pipeline (5) being connected in parallel with the feed pipe (1), and the boost valve (2) being arranged on the high-pressure pipeline (5).

4. The air circuit control system of a high and low pressure diaphragm pump according to claim 3, characterized in that: Also includes: An end pipe (6) and a tail pipe (7), wherein the end pipe (6), the feed pipe (1) and the tail pipe (7) are connected in sequence, the electric proportional valve (4) is arranged on the end pipe (6), and the diaphragm pump (3) is connected in series with the tail pipe (7).

5. The air circuit control system of a high and low pressure diaphragm pump according to claim 4, characterized in that: Also includes: A one-way valve (8), wherein the one-way valve (8) is arranged on the feed pipe (1).

6. The air circuit control system of a high and low pressure diaphragm pump according to claim 5, characterized in that: Also includes: Two single air-controlled two-way valves (9), the two single air-controlled two-way valves (9) being respectively arranged on the feed pipe (1) and the high-pressure pipeline (5) for controlling the conduction state of the pipelines, wherein one of the single air-controlled two-way valves (9) is located between the electrical proportional valve (4) and the one-way valve (8), and the other single air-controlled two-way valve (9) is located between the electrical proportional valve (4) and the boost valve (2).

7. The air circuit control system of a high and low pressure diaphragm pump according to claim 6, characterized in that: The single gas-controlled two-way valve (9) has a first control interface (901) and further comprises: A first control pipeline (10) and a solenoid valve (11), wherein the solenoid valve (11) has a control end (1101), a first control port (1102) and a second control port (1103); one end of the first control pipeline (10) is connected to the end pipe (6), and the other end is connected to the control end (1101); A second control pipeline (12) and a third control pipeline (13), wherein one end of the second control pipeline (12) is connected to the first control port (1102), and the other end is connected to the first control interface (901) of one of the single air-controlled two-way valves (9); and one end of the third control pipeline (13) is connected to the second control port (1103), and the other end is connected to the first control interface (901) of another single air-controlled two-way valve (9).

8. The air circuit control system of a high and low pressure diaphragm pump according to claim 3, characterized in that: Also includes: An air-controlled valve (14), the air-controlled valve (14) being arranged on the high-pressure pipeline (5), the air-controlled valve (14) being located between the booster valve (2) and the diaphragm pump (3), and the air-controlled valve (14) having a second control interface (1401); A fourth control pipeline (15), one end of the fourth control pipeline (15) being in communication with the high-pressure pipeline (5), and the other end of the fourth control pipeline (15) being in communication with the second control interface (1401), and the fourth control pipeline (15) being connected in parallel with the boost valve (2).

Images