A continuous synchronous grouting hydraulic control system

Abstract

The application discloses a continuous synchronous grouting hydraulic control system, which comprises a grouting main oil cylinder group, a first pumping oil cylinder group and a second pumping oil cylinder group which are arranged in parallel, mode reversing valves and a reversing valve group connected with two high-pressure oil sources are arranged on oil paths between the grouting main oil cylinder group and the first and second pumping oil cylinder groups, the reversing valve group comprises a first reversing valve between the mode reversing valve and the grouting main oil cylinder group, a second reversing valve and a third reversing valve between the mode reversing valve and the first pumping oil cylinder group, and the grouting main oil cylinder group is provided with proximity switches which are arranged in cooperation with the grouting main oil cylinder group and are associated with the reversing valve group. The technical scheme disclosed by the application can simultaneously consider the continuous pumping of single-fluid and double-fluid grouting, has a backwashing function, and can effectively avoid the occurrence of technical problems such as back grouting.

Description

Technical Field

[0001] This invention relates to the field of synchronous grouting technology, and in particular to a continuous synchronous grouting hydraulic control system. Background Technology

[0002] Grouting pumps, as essential supporting equipment for tunnel boring machine (TBM) construction, effectively prevent ground subsidence. With the increasing maturity of large-diameter TBMs, the demand for dual-liquid grouting has increased dramatically. Synchronous grouting mainly consists of two forms: single-liquid grouting and dual-liquid grouting. Single-liquid grouting has a long setting time and is prone to problems such as segment floating, making it mostly suitable for conventional TBMs. Dual-liquid grouting overcomes the drawback of the long setting time of single-liquid grouting and is mostly suitable for large-diameter TBMs. To ensure more uniform mixing of dual-liquid grouting, higher requirements are placed on the continuity of grouting.

[0003] like Figure 1 As shown, the synchronous grouting pump in the existing shield machine uses a hydraulic control system to control each circuit. This hydraulic control system mainly includes horizontal lifting valve control cylinder 2-4, horizontal lifting valve control cylinder 2-5, vertical lifting valve control cylinder 3-4, vertical lifting valve control cylinder 3-5, pumping cylinder 6-1, pumping cylinder 6-2, proximity switch 6-3, three-position four-way solenoid directional valve 7-1, two-position four-way hydraulic control valve 7-2, and two-position four-way solenoid directional valve 7-4.

[0004] When the grouting pump draws in grout, the horizontal lifting valve controls the cylinder to extend, the discharge gate to close, and the vertical lifting valve controls the cylinder to retract, the suction gate to open, and the pumping cylinder to retract, drawing the grout from the mortar tank into the grouting pump. When the grouting pump discharges grout, the vertical lifting valve controls the cylinder to extend, the suction gate to close, the horizontal lifting valve controls the cylinder to retract, the discharge gate to open, and the pumping cylinder to extend, pumping the grout out. This cycle repeats continuously. During reverse flushing, the vertical lifting valve controls the cylinder to extend, the suction gate to close, the horizontal lifting valve controls the cylinder to retract, the discharge gate to open, and the pumping cylinder to retract, drawing cleaning water into the pump body from the discharge port. During reverse flushing, the horizontal lifting valve controls the cylinder to extend, the discharge gate to close, the vertical lifting valve controls the cylinder to retract, the suction gate to open, and the pumping cylinder to extend, pumping the flushing water out of the suction port. This cycle repeats continuously. However, this technique results in discontinuous grouting and cannot be applied to two-component grouting.

[0005] In recent years, with the development of dual-liquid grouting technology, the requirements for continuous grouting have become increasingly stringent. For example, Chinese utility model patent application number CN201420776181.2 discloses a hydraulic control system for continuous grouting of a synchronous grouting pump. This system adopts hydraulic automatic control, but it has technical problems such as the inability to program and backwash. Similarly, Chinese invention patent application number CN201611035218.6 discloses a programmable automatic control grouting pump for tunnel boring machines, but it suffers from technical problems such as the inability to perform continuous grouting and the inability to solve the problem of grout return during reversal.

[0006] Therefore, it is necessary to design a continuous synchronous grouting hydraulic control system that takes into account the advantages of single and double liquid grouting. Summary of the Invention

[0007] To address the shortcomings of the aforementioned background technology, this invention proposes a continuous synchronous grouting hydraulic control system. One objective of this invention is to solve the technical problem that existing continuous synchronous grouting hydraulic control systems cannot simultaneously handle single and double liquid grouting; another objective of this invention is to solve the technical problem that existing continuous synchronous grouting hydraulic control systems cannot simultaneously handle backwashing; and yet another objective of this invention is to solve the technical problem that existing continuous synchronous grouting hydraulic control systems cannot simultaneously prevent grout return.

[0008] The technical solution of this application is as follows:

[0009] A continuous synchronous grouting hydraulic control system includes a grouting main cylinder group, a first pumping cylinder group, and a second pumping cylinder group arranged in parallel. A mode reversing valve and reversing valve groups respectively connected to two high-pressure oil sources are installed on the oil lines between the grouting main cylinder group and the first and second pumping cylinder groups. Each reversing valve group includes a first reversing valve located between the mode reversing valve and the grouting main cylinder group, a second reversing valve located between the mode reversing valve and the first pumping cylinder group, and a third reversing valve. The grouting main cylinder group is equipped with a proximity switch that detects the extension / retraction state and is associated with the reversing valve groups.

[0010] Furthermore, the rod-side chamber of the grouting main cylinder assembly is connected to the second high-pressure oil circuit P2, the return oil circuit, and the rodless chamber of the grouting main cylinder assembly, respectively; the rod-side and rodless chambers of the first pumping cylinder assembly are connected to the first high-pressure oil circuit P1 and the return oil circuit; the rod-side and rodless chambers of the second pumping cylinder assembly are connected to the first high-pressure oil circuit P1 and the return oil circuit.

[0011] Furthermore, the first pumping cylinder assembly includes a first discharge lifting cylinder and a second suction lifting cylinder, with the rod chamber and rodless chamber of the first discharge lifting cylinder and the second suction lifting cylinder being arranged in parallel; the second pumping cylinder assembly includes a second discharge lifting cylinder and a first suction lifting cylinder, with the rod chamber and rodless chamber of the second discharge lifting cylinder and the first suction lifting cylinder being arranged in parallel.

[0012] Furthermore, the rod chamber of the first pumping cylinder group is connected in parallel with the rodless chamber of the second pumping cylinder group, and the rodless chamber of the first pumping cylinder group is connected in parallel with the rod chamber of the second pumping cylinder group.

[0013] Furthermore, at least one of the first reversing valve, the second reversing valve, and the third reversing valve is a hydraulically controlled reversing valve or an electrically controlled reversing valve.

[0014] Furthermore, when the first directional valve is a first hydraulically controlled directional valve, the two control oil circuits of the first hydraulically controlled directional valve are connected in parallel with the rod-side chamber and the rodless chamber of the first pumping cylinder group, respectively.

[0015] Furthermore, a first sequence valve and a second sequence valve are respectively provided on the two control oil lines of the first hydraulic directional valve. The rodless chamber of the first pumping cylinder group and the rod chamber of the second pumping cylinder group are connected through a third sequence valve. The rod chamber of the first pumping cylinder group and the rodless chamber of the second pumping cylinder group are connected through a fourth sequence valve. The first sequence valve, the second sequence valve, the third sequence valve and the fourth sequence valve are all connected to the return oil line.

[0016] Furthermore, when the second directional valve is a second hydraulically controlled directional valve, the two control oil circuits of the second hydraulically controlled directional valve are respectively connected to the high-pressure oil source and the return oil circuit connected to the mode directional valve.

[0017] Furthermore, when the third directional valve is a third hydraulically controlled directional valve, the two control oil circuits of the third hydraulically controlled directional valve are connected to the second electrically controlled directional valve, and the second electrically controlled directional valve is connected to the high-pressure oil source and return oil circuit of the directional valve group.

[0018] Furthermore, the mode switching valve is a first electrically controlled switching valve or a manually controlled switching valve.

[0019] Furthermore, the grouting main cylinder assembly includes a first grouting main cylinder and a second grouting main cylinder, and one-way valves for pressure relief and oil replenishment are provided at both ends of the cavity of the first grouting main cylinder or the second grouting main cylinder.

[0020] Furthermore, the length of the oil ports at both ends of the one-way valve is greater than the thickness of the piston of the first or second grouting main cylinder. When the piston moves to the middle of the oil ports at both ends of the one-way valve, the rod chamber and the rodless chamber of the first or second grouting main cylinder are connected.

[0021] Compared with the prior art, the continuous synchronous grouting hydraulic control system disclosed in this invention can simultaneously take into account the continuous pumping of single and double liquid grouting, and also has a backwashing function. At the same time, it can effectively avoid technical problems such as grout return. Attached Figure Description

[0022] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a synchronous grouting hydraulic control system in the prior art;

[0024] Figure 2 This is the first embodiment of the present invention;

[0025] Figure 3 This is the second embodiment of the present invention;

[0026] Figure 4 This is the third embodiment of the present invention.

[0027] Explanation of icon numbers:

[0028] Horizontal lift valve control cylinder 2-4, horizontal lift valve control cylinder 2-5, vertical lift valve control cylinder 3-4, vertical lift valve control cylinder 3-5, pumping cylinder 6-1, pumping cylinder 6-2, proximity switch 6-3, three-position four-way solenoid directional valve 7-1, two-position four-way hydraulic control valve 7-2, two-position four-way solenoid directional valve 7-4;

[0029] 1.1 First grouting main cylinder, 1.2 Second grouting main cylinder, 2.1 First discharge lifting cylinder, 3.1 First suction lifting cylinder, 2.2 Second discharge lifting cylinder, 3.2 Second suction lifting cylinder, 4.1 First electrically controlled directional valve, 5.1 First hydraulically controlled directional valve, 5.2 Second hydraulically controlled directional valve, 5.3 Third hydraulically controlled directional valve, 4.2 Second electrically controlled directional valve, 6.1 First sequence valve, 6.2 Second sequence valve, 6.3 Third sequence valve, 6.4 Fourth sequence valve, 7.1 First proximity switch, 7.2 Second proximity switch, 8.1 First check valve, 8.2 Second check valve. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] A continuous synchronous grouting hydraulic control system, such as Figure 2 As shown, the system includes a grouting main cylinder group, a first pumping cylinder group, and a second pumping cylinder group arranged in parallel. A mode reversing valve and reversing valve groups connected to two high-pressure oil sources are installed on the oil lines between the grouting main cylinder group and the first and second pumping cylinder groups. Each reversing valve group includes a first reversing valve located between the mode reversing valve and the grouting main cylinder group, a second reversing valve located between the mode reversing valve and the first pumping cylinder group, and a third reversing valve. The grouting main cylinder group is equipped with a first proximity switch 7.1 and a second proximity switch 7.2 that detect the extension / retraction state and are associated with the reversing valve groups.

[0032] Based on the above embodiments, as a preferred embodiment, the rod chamber of the grouting main cylinder group is connected to the second high-pressure oil circuit P2, the return oil circuit, and the rodless chamber of the grouting main cylinder group, respectively; the rod chamber and rodless chamber of the first pumping cylinder group are connected to the first high-pressure oil circuit P1 and the return oil circuit; the rod chamber and rodless chamber of the second pumping cylinder group are connected to the first high-pressure oil circuit P1 and the return oil circuit.

[0033] Based on the above embodiments, as a preferred embodiment, the first pumping cylinder group includes a first discharge lifting cylinder 2.1 and a second suction lifting cylinder 3.2, and the rod chambers and rodless chambers of the first discharge lifting cylinder 2.1 and the second suction lifting cylinder 3.2 are arranged in parallel; the second pumping cylinder group includes a second discharge lifting cylinder 2.2 and a first suction lifting cylinder 3.1, and the rod chambers and rodless chambers of the second discharge lifting cylinder 2.2 and the first suction lifting cylinder 3.1 are arranged in parallel.

[0034] Based on the above embodiments, as a preferred embodiment, the rod chamber of the first pumping cylinder group and the rodless chamber of the second pumping cylinder group are connected in parallel, and the rodless chamber of the first pumping cylinder group and the rod chamber of the second pumping cylinder group are connected in parallel.

[0035] Based on the above embodiments, as a preferred embodiment, at least one of the first, second, and third directional control valves is a hydraulically controlled or electrically controlled directional control valve, preferably a two-position four-way directional control valve. Figure 2 As shown, the first, second, and third directional control valves are all hydraulically controlled directional control valves; Figure 4As shown, the first, second, and third directional control valves are all electrically controlled directional control valves. This means that the hydraulically controlled directional control valves in the entire system can be replaced with electrically controlled directional control valves. By controlling the directional control valves with electrical signals, continuous conveying can still be achieved. However, this involves more electrical control and is more prone to problems.

[0036] Based on the above implementation method, as a preferred implementation method, when the first directional valve is a first hydraulically controlled directional valve 5.1, the two control oil circuits of the first hydraulically controlled directional valve 5.1 are connected in parallel with the rod chamber and the rodless chamber of the first pumping cylinder group, respectively.

[0037] Based on the above embodiments, as a preferred embodiment, a first sequence valve 6.1 and a second sequence valve 6.2 are respectively provided on the two control oil lines of the first hydraulic directional valve 5.1. The rodless chamber of the first pumping cylinder group and the rod chamber of the second pumping cylinder group are connected through a third sequence valve 6.3, and the rod chamber of the first pumping cylinder group and the rodless chamber of the second pumping cylinder group are connected through a fourth sequence valve 6.4. The first sequence valve 6.1, the second sequence valve 6.2, the third sequence valve 6.3, and the fourth sequence valve 6.4 are all connected to the return oil line. Figure 3 As shown, the entire hydraulic system can eliminate the sequence valve and still have continuous conveying function. However, because it is impossible to realize the sequential action sequence of the first suction lifting cylinder, the second discharge lifting cylinder, the first discharge lifting cylinder, the second suction lifting cylinder, and the grouting main cylinder, the problem of grout return cannot be solved.

[0038] Based on the above implementation method, as a preferred implementation method, when the second directional valve is the second hydraulically controlled directional valve 5.2, the two control oil circuits of the second hydraulically controlled directional valve 5.2 are respectively connected to the high-pressure oil source and the return oil circuit connected to the mode directional valve.

[0039] Based on the above implementation method, as a preferred implementation method, when the third directional valve is the third hydraulically controlled directional valve 5.3, the two control oil circuits of the third hydraulically controlled directional valve 5.3 are connected to the second electrically controlled directional valve 4.2, and the second electrically controlled directional valve 4.2 is connected to the high-pressure oil source and return oil circuit of the directional valve group.

[0040] Based on the above embodiments, as a preferred embodiment, the mode reversing valve is a first electrically controlled reversing valve 4.1 or a manual reversing valve. Figures 2-4 In this context, the mode switching valve is a three-position four-way solenoid switching valve.

[0041] Based on the above embodiments, as a preferred embodiment, the grouting main cylinder group includes a first grouting main cylinder 1.1 and a second grouting main cylinder 1.2, and one-way valves for pressure relief and oil replenishment are provided at both ends of the cavity of the first grouting main cylinder 1.1 or the second grouting main cylinder 1.2.

[0042] Furthermore, the length of the oil ports at both ends of the one-way valve is greater than the thickness of the piston of the first grouting main cylinder 1.1 or the second grouting main cylinder 1.2. When the piston moves to the middle of the oil ports at both ends of the one-way valve, the rod chamber and the rodless chamber of the first grouting main cylinder 1.1 or the second grouting main cylinder 1.2 are connected.

[0043] In the preferred embodiment of the present invention, the system comprises a first grouting main cylinder, a second grouting main cylinder, a first discharge lifting cylinder, a first suction lifting cylinder, a second discharge lifting cylinder, a second suction lifting cylinder, a first electrically controlled directional valve, a first hydraulically controlled directional valve, a second hydraulically controlled directional valve, a third hydraulically controlled directional valve, a second electrically controlled directional valve, a first sequence valve, a second sequence valve, a third sequence valve, a fourth sequence valve, a first proximity switch, a second proximity switch, a first check valve, and a second check valve. The first hydraulic oil source main circuit is connected to the second hydraulically controlled directional valve and the second electrically controlled directional valve, respectively. The second electrically controlled directional valve is connected to the third hydraulically controlled directional valve. The first hydraulic main circuit is sequentially connected to the second hydraulically controlled directional valve and the third hydraulically controlled directional valve. Due to the presence of the third hydraulically controlled directional valve, the first main oil circuit has two main paths after passing through it. The first oil circuit passes sequentially through the rodless chamber of the first discharge lifting valve and the second suction lifting valve, the third sequence valve, and the second sequence valve. The second oil circuit passes sequentially through the rodless chamber of the second discharge lifting valve and the first suction lifting valve, the fourth sequence valve, and the first sequence valve. The second hydraulic oil circuit passes sequentially through the first electrically controlled directional valve and the first hydraulically controlled directional valve. The first hydraulically controlled directional valve is connected to the rod chamber of the first grouting main cylinder and the second grouting main cylinder. The rodless chamber of the first grouting main cylinder is also connected to the rodless chamber. The first check valve at the bottom of the second grouting main cylinder allows oil from the rod chamber to flow unidirectionally into the rodless chamber only when the cylinder retracts to the bottom. The second check valve at the top of the second grouting main cylinder allows oil from the rodless chamber to flow unidirectionally into the rod chamber only when the cylinder extends to the top. The return oil circuit is connected to the first electrically controlled directional valve, the second hydraulically controlled directional valve, the second electrically controlled directional valve, the first sequence valve, the second sequence valve, the third sequence valve, and the fourth sequence valve, respectively.

[0044] The first pumping unit includes a first suction lifting cylinder, a first discharge lifting cylinder, and a first grouting main cylinder. The second pumping unit includes a second suction lifting cylinder, a second discharge lifting cylinder, and a second grouting main cylinder. The grouting process has two stages. In the first stage, the first pumping unit simultaneously draws material from the suction port and the second pumping unit simultaneously discharges material from the discharge port. In the second stage, the first pumping unit discharges material from the discharge port and the second pumping unit simultaneously draws material from the suction port. In the first stage, the first discharge lifting cylinder and the second suction lifting cylinder extend simultaneously, then the first suction lifting cylinder and the second discharge lifting cylinder retract, and finally the first grouting main cylinder retracts and the second grouting main cylinder extends. This causes the suction port of the first pumping unit to open and the discharge port to close, allowing the first pumping unit to draw material; in the second pumping unit, the suction port to close and the discharge port to open, allowing the second pumping unit to discharge material. In the second stage, the first discharge lifting cylinder and the second suction lifting cylinder retract simultaneously. Then, the first suction lifting cylinder and the second discharge lifting cylinder extend. Finally, the first grouting main cylinder extends and the second grouting main cylinder retracts. This causes the suction port of the first pumping unit to close and the discharge port to open, allowing the first pumping unit to discharge material from the discharge port. Similarly, the suction port of the second pumping unit opens and the discharge port closes, allowing the second pumping unit to draw material from the suction port. This cycle repeats continuously, achieving continuous pumping of the slurry.

[0045] Similarly, the rinsing process has two stages. In the first stage, the first pumping unit discharges cleaning water from its suction port and the second pumping unit simultaneously draws in cleaning water from its discharge port. In the second stage, the first pumping unit draws in cleaning water from its discharge port and the second pumping unit discharges cleaning water from its suction port simultaneously. In the first stage, the first discharge lifting cylinder and the second suction lifting cylinder extend simultaneously, then retract, and finally the first grouting main cylinder extends and the second grouting main cylinder retracts. This causes the suction port of the first pumping unit to open and the discharge port to close, allowing the first pumping unit to discharge cleaning water from its suction port. In the second pumping unit, the suction port closes and the discharge port opens, allowing the second pumping unit to draw in cleaning water from its discharge port. In the second stage, the first discharge lifting cylinder and the second suction lifting cylinder retract simultaneously. Then, the first suction lifting cylinder and the second discharge lifting cylinder extend. Finally, the first grouting main cylinder retracts and the second grouting main cylinder extends. This causes the suction port of the first pumping unit to close and the discharge port to open, allowing the first pumping unit to draw in cleaning water from the discharge port. Conversely, the suction port of the second pumping unit opens and the discharge port closes, allowing the second pumping unit to discharge cleaning water from the suction port. This cycle repeats continuously, achieving continuous rinsing.

[0046] Specifically, such as Figure 2As shown, it mainly consists of a first grouting main cylinder 1.1, a second grouting main cylinder 1.2, a first discharge lifting cylinder 2.1, a first suction lifting cylinder 3.1, a second discharge lifting cylinder 2.2, a second suction lifting cylinder 3.2, a first electrically controlled directional valve 4.1, a first hydraulically controlled directional valve 5.1, a second hydraulically controlled directional valve 5.2, a third hydraulically controlled directional valve 5.3, a second electrically controlled directional valve 4.2, a first sequence valve 6.1, a second sequence valve 6.2, a third sequence valve 6.3, a fourth sequence valve 6.4, a first proximity switch 7.1, a second proximity switch 7.2, a first check valve 8.1, and a second check valve 8.2.

[0047] When the left side of the electrically controlled directional valve 4.1 is energized for grouting, the high-pressure oil from the second hydraulic oil source acts on the upper position of the second hydraulically controlled directional valve 5.2. The upper position of the second hydraulically controlled directional valve 5.2 is connected to the oil circuit. The high-pressure oil from the first hydraulic oil source passes through the upper position oil circuit of the second hydraulically controlled directional valve 5.2. If the first grouting main cylinder 1.1 extends to its top, the second proximity switch 7.2 is activated, and the second electrically controlled directional valve 4.2 is energized. The high-pressure oil from the first hydraulic oil source passes through the right position oil circuit of the second electrically controlled directional valve 4.2. The upper position of the third hydraulically controlled directional valve 5.3 is connected to the oil circuit. After passing through the third hydraulically controlled directional valve 5.3, the high-pressure oil sequentially passes through the rodless chambers of the first discharge lifting cylinder 2.1 and the second suction lifting cylinder 3.2, causing the first discharge port to close and the second suction port to close. The high-pressure oil reaches the opening pressure of the second sequence valve 6.2 and acts on the third sequence valve 6.3. The first suction lifting valve 3.1 and the second discharge lifting valve 2.2 pass through the rod chambers, causing the first suction port and the second discharge port to open. The high-pressure oil reaches the opening pressure of the second sequence valve 6.2 and acts on the first hydraulic directional valve 5.1, causing the lower position of the first hydraulic directional valve 5.1 to connect with the oil circuit. The second hydraulic oil source passes through the first electric directional valve 4.1 and the first hydraulic directional valve 5.1 in sequence. The high-pressure oil acts on the rod chamber of the first grouting main cylinder 1.1, causing the first grouting main cylinder 1.1 to retract and the second grouting main cylinder 1.2 to extend simultaneously. At this time, the first suction port of the first pumping unit opens and the first discharge port closes. The first grouting main cylinder 1.1 retracts, and the first pumping unit sucks up material. At the same time, the second suction port of the second pumping unit closes and the second discharge port opens. The second grouting main cylinder 1.2 extends, and the second pumping unit discharges material.When the first grouting main cylinder 1.1 retracts to its bottom, the hydraulic oil in the rodless chamber of the grouting main cylinder is depressurized through the second check valve 8.2, displacing and cooling the hydraulic oil in the rodless chamber until the second grouting main cylinder 1.2 extends to its maximum stroke. The first grouting main cylinder 1.1 then activates the first proximity switch 7.1. After activation, the first proximity switch 7.1 de-energizes the second electrically controlled directional valve 4.2. At this time, the first hydraulic oil source passes through the left position of the second electrically controlled directional valve 4.2, and the third hydraulically controlled directional valve... The lower position of valve 5.3 is connected to the oil circuit. High-pressure oil from the first hydraulic oil source passes through the lower position oil circuit of the third hydraulic control directional valve 5.3. The high-pressure oil then passes through the rodless chambers of the first suction lifting cylinder 3.1 and the second discharge lifting cylinder 2.2, causing the first suction port to close and the second discharge port to close. When the pressure in the oil circuit reaches the opening pressure of the fourth sequence valve 6.4, the high-pressure oil passes through the rod-side chambers of the first discharge lifting cylinder 2.1 and the second suction lifting cylinder 3.2, causing the first discharge port and the second suction port to open. When the pressure in the oil circuit... When the opening pressure of the first sequence valve 6.1 is reached, the high-pressure oil acts on the upper position of the first hydraulic directional valve 5.1, causing the second hydraulic oil source to sequentially pass through the upper positions of the first electric directional valve 4.1 and the first hydraulic directional valve 5.1, acting on the rod chamber of the second grouting main cylinder 1.2. The second grouting main cylinder 1.2 retracts, and the first grouting main cylinder 1.1 extends synchronously. At this time, the first pumping unit closes, the first discharge port opens, the first conveying main cylinder extends, the first pumping unit discharges material, and simultaneously the second... The second suction port of the two pumping units opens, the second discharge port closes, and the second main conveying cylinder 1.2 retracts, allowing the second pumping unit to draw in material. When the second main grouting cylinder 1.2 retracts to the bottom, high-pressure oil flows through the first one-way valve 8.1 into the rodless chamber of the first main grouting cylinder 1.1, replenishing the first main grouting cylinder 1.1 until it extends to its maximum stroke, activating the proximity switch 7.2. Activation of the proximity switch 7.2 then energizes the second electrically controlled directional valve 4.2. This cycle continues, enabling continuous pumping of the grout.

[0048] When the right side of the electrically controlled directional valve 4.1 is energized for flushing, the high-pressure oil from the second hydraulic oil source acts on the lower position of the second hydraulically controlled directional valve 5.2. The lower side of the second hydraulically controlled directional valve 5.2 is connected to the oil circuit. The high-pressure oil from the first hydraulic oil source passes through the second hydraulically controlled directional valve 5.2. If the first grouting main cylinder 1.1 extends to the top, the second proximity switch 7.2 is activated, and the second electrically controlled directional valve 4.2 is energized. The first hydraulic oil source passes through the right oil circuit of the second electrically controlled directional valve 4.2. At this time, the upper position of the third hydraulically controlled directional valve 5.3 is connected to the oil circuit. After passing through the third hydraulically controlled directional valve 5.3, the high-pressure oil passes through the rodless chambers of the first suction lifting cylinder 3.1 and the second discharge lifting cylinder 2.2 in sequence, causing the first suction port to close and the second discharge port to close. When the pressure in the oil circuit reaches the opening pressure of the fourth sequence valve 6.4, the high-pressure oil passes through the first discharge lifting cylinder 2. The rod chambers of the first discharge port and the second suction port of the first pumping unit 3.1 and the second suction port of the second pumping unit open. When the pressure in the oil circuit reaches the opening pressure of the first sequence valve 6.1, the high-pressure oil acts on the upper position of the first hydraulic control directional valve 5.1, causing the second hydraulic oil source to pass through the upper oil circuits of the first electric control directional valve 4.1 and the first hydraulic control directional valve 5.1 in sequence, and act on the rod chamber of the first grouting main cylinder 1.1. The first grouting main cylinder 1.1 retracts, and the second grouting main cylinder 1.2 extends synchronously. At this time, the first suction port of the first pumping unit closes, the first discharge port opens, the first grouting main cylinder 1.1 retracts, the first pumping unit draws cleaning water from the first discharge port, and at the same time, the second suction port of the second pumping unit opens, the second discharge port closes, the second grouting main cylinder 1.2 extends, and the second pumping unit discharges cleaning fluid from the second suction port.When the first grouting main cylinder 1.1 retracts to the bottom, the hydraulic oil in the rodless chamber of the grouting main cylinder is depressurized through the second one-way valve 8.2, displacing and cooling the hydraulic oil in the rodless chamber until the second grouting main cylinder 1.2 extends to its maximum stroke. The first grouting main cylinder 1.1 activates the first proximity switch 7.1. After activation, the first proximity switch 7.1 de-energizes the second electrically controlled directional valve 4.2. The first hydraulic oil source passes through the left oil circuit of the second electrically controlled directional valve 4.2. The high-pressure oil from the first hydraulic oil source passes sequentially through the lower oil circuit of the second hydraulically controlled directional valve 5.2 and the lower oil circuit of the third hydraulically controlled directional valve 5.3, acting on the rodless chambers of the first discharge lifting cylinder 2.1 and the second suction lifting cylinder 3.2, causing the first discharge port to close and the second suction port to close. The high-pressure oil reaches the opening pressure of the second sequence valve 6.2 and acts on the third sequence valve 6.3. The rod chambers of the first suction lifting valve and the second discharge lifting valve cause the first suction port and the second discharge port to open. The high-pressure oil reaches the opening pressure of the second sequence valve 6.2 and acts on the first hydraulic control directional valve 5.1, causing the lower position of the first hydraulic control directional valve 5.1 to connect with the oil circuit. The second hydraulic oil source passes through the lower oil circuit of the first electric control directional valve 4.1 and the first hydraulic control directional valve 5.1 in sequence, and acts on the rod chamber of the second grouting main cylinder 1.2. The second grouting main cylinder 1.2 retracts, and the first grouting main cylinder 1.1 extends synchronously. At this time, the first suction port of the first pumping unit opens, the first discharge port closes, the first conveying main cylinder extends, and the first pumping unit discharges cleaning water from the first suction port. At the same time, the second suction port of the second pumping unit closes, the second discharge port opens, the second conveying main cylinder 1.2 retracts, and the second pumping unit absorbs cleaning water from the second discharge port. When the second grouting main cylinder 1.2 retracts to its bottom, high-pressure oil flows into the rodless chamber of the first grouting main cylinder 1.1 through the first one-way valve 8.1, replenishing the first grouting main cylinder 1.1 with oil until it extends to its maximum stroke, activating the proximity switch 7.2. The activation of the proximity switch 7.2 then energizes the second electrically controlled directional valve 4.2. This cycle repeats continuously, achieving the cleaning effect.

[0049] All aspects not detailed in this invention are conventional technical means known to those skilled in the art.

[0050] The above content shows and describes the basic principles, main features, and beneficial effects of the present invention. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A continuous synchronous grouting hydraulic control system, characterized in that: It includes a grouting main cylinder group, a first pumping cylinder group, and a second pumping cylinder group arranged in parallel. A mode reversing valve and a reversing valve group respectively connected to two high-pressure oil sources are installed in the oil circuit between the grouting main cylinder group and the first pumping cylinder group and the second pumping cylinder group. The reversing valve group includes a first reversing valve located between the mode reversing valve and the grouting main cylinder group, a second reversing valve located between the mode reversing valve and the first pumping cylinder group, and a third reversing valve. The grouting main cylinder group is equipped with a proximity switch that detects the extension and retraction state and is associated with the reversing valve group. The rod chamber of the grouting main cylinder group is connected to the second high-pressure oil circuit P2, the return oil circuit, and the rodless chamber of the grouting main cylinder group, respectively; the rod chamber and rodless chamber of the first pumping cylinder group are connected to the first high-pressure oil circuit P1 and the return oil circuit; the rod chamber and rodless chamber of the second pumping cylinder group are connected to the first high-pressure oil circuit P1 and the return oil circuit. The first pumping cylinder group includes a first discharge lifting cylinder (2.1) and a second suction lifting cylinder (3.2), and the rod chambers and rodless chambers of the first discharge lifting cylinder (2.1) and the second suction lifting cylinder (3.2) are arranged in parallel; the second pumping cylinder group includes a second discharge lifting cylinder (2.2) and a first suction lifting cylinder (3.1), and the rod chambers and rodless chambers of the second discharge lifting cylinder (2.2) and the first suction lifting cylinder (3.1) are arranged in parallel. The rod chamber of the first pumping cylinder group is connected in parallel with the rodless chamber of the second pumping cylinder group, and the rodless chamber of the first pumping cylinder group is connected in parallel with the rod chamber of the second pumping cylinder group. The first directional valve is a first hydraulically controlled directional valve (5.1). The two control oil lines of the first hydraulically controlled directional valve (5.1) are respectively equipped with a first sequence valve (6.1) and a second sequence valve (6.2). The rodless chamber of the first pumping cylinder group and the rod chamber of the second pumping cylinder group are connected through a third sequence valve (6.3). The rod chamber of the first pumping cylinder group and the rodless chamber of the second pumping cylinder group are connected through a fourth sequence valve (6.4). The first sequence valve (6.1), the second sequence valve (6.2), the third sequence valve (6.3), and the fourth sequence valve (6.4) are all connected to the return oil line. The grouting main cylinder group includes a first grouting main cylinder (1.1) and a second grouting main cylinder (1.2). The two ends of the cavity of the first grouting main cylinder (1.1) or the second grouting main cylinder (1.2) are provided with one-way valves for pressure relief and oil replenishment. The length of the oil ports at both ends of the one-way valve is greater than the thickness of the piston of the first grouting main cylinder (1.1) or the second grouting main cylinder (1.2). When the piston moves to the middle of the oil ports at both ends of the one-way valve, the rod chamber and the rodless chamber of the first grouting main cylinder (1.1) or the second grouting main cylinder (1.2) are connected. The third directional valve is a third hydraulically controlled directional valve (5.3). The two control oil circuits of the third hydraulically controlled directional valve (5.3) are connected to a second electrically controlled directional valve (4.2). The second electrically controlled directional valve (4.2) is connected to the high-pressure oil source and return oil circuit of the directional valve group. The mode switching valve is the first electrically controlled switching valve (4.1).

2. The continuous synchronous grouting hydraulic control system according to claim 1, characterized in that: The second directional valve is a hydraulically controlled directional valve or an electrically controlled directional valve.

3. The continuous synchronous grouting hydraulic control system according to claim 2, characterized in that: When the second directional valve is the second hydraulically controlled directional valve (5.2), the two control oil circuits of the second hydraulically controlled directional valve (5.2) are respectively connected to the high-pressure oil source and the return oil circuit connected to the mode directional valve.

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