Double-guiding quick hydraulic ramming system

Abstract

The present application relates to a kind of double-guiding quick hydraulic ramming system, belong to coal briquette ramming equipment technical field, specifically including walking mechanism installed on track beam, the main pressure oil cylinder is installed on the walking mechanism, the piston rod of the main pressure oil cylinder is installed with coal pressing plate, two quick oil cylinders are also installed on the walking mechanism, the quick oil cylinder is located at the two sides of main pressure oil cylinder respectively, the piston rod of the quick oil cylinder is installed on the coal pressing plate, the cylinder diameter of the quick oil cylinder is less than the cylinder diameter of main pressure oil cylinder, the quick oil cylinder and main pressure oil cylinder are connected with hydraulic control system respectively;The present application is simple in structure, convenient to use, system operation is reliable and stable, and failure rate is low.

Description

Technical Field

[0001] The invention relates to a double-guide rapid hydraulic tamping system, belonging to the technical field of coal cake tamping equipment. Background Art

[0002] Briquette forming systems are widely used both domestically and internationally. Existing hydraulic systems suffer from slow speeds and high energy consumption. Existing systems utilize differential or filling valve systems. To ensure the required density of the briquettes after forming, high pressure is required in briquette forming machines. Consequently, domestic manufacturers utilize two hydraulic cylinders with diameters between 280 and 320 mm per pressure head. Due to the large cylinder diameters, achieving high speeds in differential systems requires increased pump flow and larger drive motors. This results in high energy consumption, increased system heat generation, reduced equipment lifespan, and a high failure rate. Summary of the Invention

[0003] In order to solve the technical problems existing in the prior art, the present invention provides a dual-guide rapid hydraulic tamping system with a simple structure, easy use, reliable and stable system operation and low failure rate.

[0004] To achieve the above-mentioned object, the technical solution adopted by the present invention is a dual-guide rapid hydraulic tamping system, comprising a traveling mechanism installed on a track beam, a main pressure oil cylinder installed on the traveling mechanism, a coal pressure plate installed on the piston rod of the main pressure oil cylinder, and two rapid oil cylinders installed on the traveling mechanism, the rapid oil cylinders are respectively located on both sides of the main pressure oil cylinder, the piston rods of the rapid oil cylinders are installed on the coal pressure plate, the cylinder diameter of the rapid oil cylinder is smaller than the cylinder diameter of the main pressure oil cylinder, and the rapid oil cylinder and the main pressure oil cylinder are respectively connected to a hydraulic control system;

[0005] The hydraulic control system includes a first electromagnetic gate valve, a second electromagnetic gate valve, a first sequence valve, and a first hydraulically controlled one-way valve. The oil inlets of the first electromagnetic gate valve and the second electromagnetic gate valve are respectively connected to the oil inlet main pipe, and the oil outlet of the first electromagnetic gate valve is respectively connected to the oil inlet of the first sequence valve and the oil port k of the second hydraulically controlled one-way valve. The oil outlet of the first sequence valve is connected to the oil inlet of the first one-way valve, the oil outlet of the first one-way valve is connected to the rod chamber of the fast oil cylinder and the oil inlet of the first throttle valve, the oil outlet of the first throttle valve is connected to the oil port a of the first hydraulically controlled one-way valve, the oil port b of the first hydraulically controlled one-way valve is connected to the oil port b of the second hydraulically controlled one-way valve, and the oil port a of the second hydraulically controlled one-way valve is connected to the rodless chamber of the fast oil cylinder through the second throttle valve;

[0006] The oil outlet of the second solenoid gate valve is connected to the oil inlet of the second sequence valve and the oil port k of the first hydraulically controlled one-way valve respectively. The oil outlet of the second sequence valve is connected to the oil inlet of the third sequence valve through the second one-way valve. The oil outlet of the third sequence valve is connected to the first reversing valve. The first reversing valve is connected to the oil outlet main pipe.

[0007] The rod chamber of the fast oil cylinder is also connected to the oil inlet of the one-way reversing valve through the second reversing valve, the oil outlet of the one-way reversing valve is connected to the k port of the charging valve, the rodless chamber of the main pressure oil cylinder is connected to the b port of the charging valve, the a port of the charging valve is connected to the oil tank, the rodless chamber of the main pressure oil cylinder is connected to the oil outlet of the third sequence valve, the oil outlet of the third sequence valve is also connected to the b port of the third hydraulically controlled one-way valve, the a port of the third hydraulically controlled one-way valve is connected to the rod chamber of the main pressure oil cylinder, the a port of the third hydraulically controlled one-way valve is also connected to the a port of the balancing valve, the b port of the balancing valve is connected to the oil tank, and the c port of the balancing valve is also connected to the rodless chamber of the main pressure oil cylinder;

[0008] The oil outlet of the second one-way valve is also connected to the oil outlet end of the second throttle valve, and the oil port b of the first hydraulically controlled one-way valve is also connected to the oil outlet main pipe through a pipeline;

[0009] The oil drain ports of the first electromagnetic gate valve, the second electromagnetic gate valve, the first sequence valve, the second sequence valve, the third sequence valve, the first reversing valve and the second reversing valve are respectively connected to the oil drain main pipe.

[0010] Preferably, a third throttle valve is further connected to the rear of the oil outlet of the first reversing valve.

[0011] Compared with existing technologies, the present invention offers the following technical advantages: The present invention utilizes a filling valve system, where the coal pressure plate descends by its weight, creating a negative pressure between the filling valve and the oil cylinder, drawing oil into the cylinder. Without considering factors such as cylinder seal friction and hydraulic oil return resistance, the coal pressure plate descends at an accelerated rate from zero. However, in actual use, due to factors such as cylinder seal resistance and return resistance, the cylinder does not enter a free-fall state, making it susceptible to external influences. Furthermore, the entire system consumes less energy, generates less heat, and has a long service life and a low failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention.

[0013] Figure 2 This is the hydraulic diagram of the control principle of the present invention. DETAILED DESCRIPTION

[0014] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0015] like Figure 1 and Figure 2 As shown, the dual-guide rapid hydraulic tamping system includes a traveling mechanism 1 installed on the track beam, a main pressure cylinder 2 is installed on the traveling mechanism 1, a coal pressure plate 3 is installed on the piston rod of the main pressure cylinder 2, and two rapid cylinders 4 are also installed on the traveling mechanism 1. The rapid cylinders 4 are respectively located on both sides of the main pressure cylinder 2, and the piston rods of the rapid cylinders 4 are installed on the coal pressure plates 3. The cylinder diameter of the rapid cylinder 4 is smaller than that of the main pressure cylinder. The rapid cylinder 4 and the main pressure cylinder 2 are respectively connected to the hydraulic control system.

[0016] The fast cylinder of the present invention adopts 160 / 110-1450, and the main pressure cylinder adopts 300 / 180-1400, and the main pressure cylinder 2 and the fast cylinder 4 are controlled by the hydraulic control system to realize the linkage of the fast cylinder 4 and the main pressure cylinder 2, thereby realizing the auxiliary control of the main pressure cylinder 2 by the fast cylinder 4.

[0017] Among them, the hydraulic control system includes a first electromagnetic gate valve 5, a second electromagnetic gate valve 6, a first sequence valve 7, and a first hydraulically controlled one-way valve 8. The oil inlets of the first electromagnetic gate valve 5 and the second electromagnetic gate valve 6 are respectively connected to the oil inlet main pipe, and the oil outlet of the first electromagnetic gate valve 5 is respectively connected to the oil inlet of the first sequence valve 7 and the oil port k of the second hydraulically controlled one-way valve 9. The oil outlet of the first sequence valve 7 is connected to the oil inlet of the first one-way valve 10, and the oil outlet of the first one-way valve 10 is connected to the rod chamber of the fast cylinder 4 and the oil inlet of the first throttle valve 11. The oil outlet of the first throttle valve 11 is connected to the oil port a of the first hydraulically controlled one-way valve 8, the oil port b of the first hydraulically controlled one-way valve 8 is connected to the oil port b of the second hydraulically controlled one-way valve 9, and the oil port a of the second hydraulically controlled one-way valve 9 is connected to the rodless chamber of the fast cylinder 4 through the second throttle valve 13;

[0018] The oil outlet of the second solenoid gate valve 6 is connected to the oil inlet of the second sequence valve 14 and the oil port k of the first hydraulically controlled one-way valve 8 respectively. The oil outlet of the second sequence valve 14 is connected to the oil inlet of the third sequence valve 16 through the second one-way valve 15. The oil outlet of the third sequence valve 16 is connected to the first reversing valve 21. The first reversing valve 21 is connected to the oil outlet main pipe.

[0019] The rod chamber of the fast oil cylinder 4 is also connected to the oil inlet of the one-way reversing valve 17 through the second reversing valve 22, the oil outlet of the one-way reversing valve 17 is connected to the k port of the charging valve 18, the rodless chamber of the main pressure oil cylinder 2 is connected to the b port of the charging valve 18, the a port of the charging valve 18 is connected to the oil tank, the rodless chamber of the main pressure oil cylinder 2 is connected to the oil outlet of the third sequence valve 16, the oil outlet of the third sequence valve 16 is also connected to the b port of the third hydraulically controlled one-way valve 19, the a port of the third hydraulically controlled one-way valve 19 is connected to the rod chamber of the main pressure oil cylinder 2, the a port of the third hydraulically controlled one-way valve 19 is also connected to the a port of the balancing valve 20, the b port of the balancing valve 20 is connected to the oil tank, and the c port of the balancing valve 20 is also connected to the rodless chamber of the main pressure oil cylinder 2;

[0020] The oil outlet of the second one-way valve 15 is also connected to the oil outlet end of the second throttle valve 13, and the oil port b of the first hydraulically controlled one-way valve 8 is also connected to the oil outlet main pipe through a pipeline;

[0021] The oil drain ports of the first electromagnetic gate valve 5, the second electromagnetic gate valve 6, the first sequence valve 7, the second sequence valve 14, the third sequence valve 16, the first reversing valve 21 and the second reversing valve 22 are respectively connected to the oil drain main pipe.

[0022] Its working principle in the present invention is:

[0023] 1) The rapid cylinder descends rapidly, closing the first solenoid gate valve 5 and opening the second solenoid gate valve 6 and second sequence valve 14. Hydraulic oil flows through the second solenoid gate valve 6, second sequence valve 14, and second check valve 15 to fill the rodless chamber of the rapid cylinder. The piston rod of the rapid cylinder controls the downward movement of the coal pressure plate, which in turn forcibly extends the piston rod of the main pressure cylinder. The passive rapid descent of the main pressure cylinder causes the filling valve 18 to open, rapidly filling the rodless chamber of the main pressure cylinder with oil.

[0024] 2) Rapidly pressurize to 5MPa. When the coal pressure plate contacts the briquettes, the pressure in the rodless chamber of the quick cylinder rises to 4MPa. The third sequence valve 16 is then opened, and the rodless chambers of both the main and quick cylinders are simultaneously filled and pressurized, causing the coal pressure plate to compress the briquettes. As the oil level increases, the piston of the main cylinder continues to move downward, and oil from the rod chamber of the main cylinder continues to flow into the rodless chamber, rapidly pressurizing the rodless chamber of the main cylinder to 5MPa.

[0025] 3) Pressurize above 5MPa. When the coal cake pressing pressure reaches 5MPa, the pressure oil in the rodless chamber of the main pressure oil cylinder prompts the balance valve 20 to open, and the oil in the rod chamber of the main pressure oil cylinder flows back to the oil tank. The rodless chamber of the main pressure oil cylinder can continue to be pressurized until the set pressure is reached.

[0026] 4) Shockless decompression: During decompression, the first reversing valve 21 is energized to open, the second sequence valve 14 is closed, and the rodless chamber of the main pressure cylinder returns oil until the pressure drops to 0.

[0027] 5) Coal pressure plate rises: Open the first electromagnetic gate valve 5 and the first sequence valve 7 to fill the rod chamber of the rapid oil cylinder with oil, while the oil in the rodless chamber of the rapid oil cylinder returns through the third sequence valve 16. At the same time, the third hydraulically controlled one-way valve opens to fill the rod chamber of the main pressure oil cylinder with oil, and the rapid oil cylinder stops rising and maintains its position.

[0028] At this point a single cycle is completed.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims

1. A dual-guide rapid hydraulic tamping system, comprising a traveling mechanism mounted on a track beam, a main pressure oil cylinder mounted on the traveling mechanism, and a coal pressure plate mounted on the piston rod of the main pressure oil cylinder, characterized in that: Two fast oil cylinders are also installed on the walking mechanism. The fast oil cylinders are respectively located on both sides of the main pressure oil cylinder. The piston rods of the fast oil cylinders are installed on the pressure coal plate. The cylinder diameter of the fast oil cylinder is smaller than the cylinder diameter of the main pressure oil cylinder. The fast oil cylinder and the main pressure oil cylinder are respectively connected to the hydraulic control system. The hydraulic control system includes a first electromagnetic gate valve, a second electromagnetic gate valve, a first sequence valve, and a first hydraulically controlled one-way valve. The oil inlets of the first electromagnetic gate valve and the second electromagnetic gate valve are respectively connected to the oil inlet main pipe, and the oil outlet of the first electromagnetic gate valve is respectively connected to the oil inlet of the first sequence valve and the oil port k of the second hydraulically controlled one-way valve. The oil outlet of the first sequence valve is connected to the oil inlet of the first one-way valve, the oil outlet of the first one-way valve is connected to the rod chamber of the fast oil cylinder and the oil inlet of the first throttle valve, the oil outlet of the first throttle valve is connected to the oil port a of the first hydraulically controlled one-way valve, the oil port b of the first hydraulically controlled one-way valve is connected to the oil port b of the second hydraulically controlled one-way valve, and the oil port a of the second hydraulically controlled one-way valve is connected to the rodless chamber of the fast oil cylinder through the second throttle valve; The oil outlet of the second solenoid gate valve is connected to the oil inlet of the second sequence valve and the oil port k of the first hydraulically controlled one-way valve respectively. The oil outlet of the second sequence valve is connected to the oil inlet of the third sequence valve through the second one-way valve. The oil outlet of the third sequence valve is connected to the first reversing valve. The first reversing valve is connected to the oil outlet main pipe. The rod chamber of the fast oil cylinder is also connected to the oil inlet of the one-way reversing valve through the second reversing valve, the oil outlet of the one-way reversing valve is connected to the k port of the charging valve, the rodless chamber of the main pressure oil cylinder is connected to the b port of the charging valve, the a port of the charging valve is connected to the oil tank, the rodless chamber of the main pressure oil cylinder is connected to the oil outlet of the third sequence valve, the oil outlet of the third sequence valve is also connected to the b port of the third hydraulically controlled one-way valve, the a port of the third hydraulically controlled one-way valve is connected to the rod chamber of the main pressure oil cylinder, the a port of the third hydraulically controlled one-way valve is also connected to the a port of the balancing valve, the b port of the balancing valve is connected to the oil tank, and the c port of the balancing valve is also connected to the rodless chamber of the main pressure oil cylinder; The oil outlet of the second one-way valve is also connected to the oil outlet end of the second throttle valve, and the oil port b of the first hydraulically controlled one-way valve is also connected to the oil outlet main pipe through a pipeline; The oil drain ports of the first electromagnetic gate valve, the second electromagnetic gate valve, the first sequence valve, the second sequence valve, the third sequence valve, the first reversing valve and the second reversing valve are respectively connected to the oil drain main pipe.

2. The dual-guide rapid hydraulic tamping system according to claim 1, characterized in that: The rear portion of the oil outlet of the first reversing valve is further connected to a third throttle valve.

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