CN203175582U - Hydraulic control annular cavity liquid-return low-resistance integrated valve set system - Google Patents

Abstract

The utility model belongs to the technical field of coal mine shaft bottom hydraulic supports, and provides a hydraulic control annular cavity liquid-return low-resistance integrated valve set system which reduces oil return resistance and ensures effectiveness of a stand column. According to the technical scheme, the integrated valve set system comprises a valve base and a hydraulic control one-way valve, two cavities are arranged in the valve base in parallel, the hydraulic control one-way valve and an alternative one-way valve are arranged in the two cavities correspondingly, a first connector base and a second connector base are arranged on the two sides of the valve base respectively, and the first connector base and the second connector base are arranged on the valve base in a sealing mode. An oil inlet A is formed in the first connector base, an oil return port B is formed in the second connector base, a valve core is arranged in an oil duct between the first connector base and the second connector base in a sliding mode, the valve core is arranged in the oil duct in a sealing mode, a spring is arranged between the second connector base and the valve core, and a first oil-flowing port C is formed in the upper portion of the valve base and communicated with the middle of the oil duct. The hydraulic control annular cavity liquid-return low-resistance integrated valve set system is mainly used for an oil line system of a coal mine shaft bottom stand column oil cylinder.

Description

Hydraulic control ring cavity liquid return low resistance integrated valve group system

technical field

The utility model relates to a liquid-controlled ring cavity return liquid low-resistance integrated valve group system, which belongs to the technical field of hydraulic supports at the bottom of coal mines.

Background technique

With the development of the fully mechanized mining industry, the hydraulic support is developing towards a large mining height, and the cylinder diameter of the column is also increased accordingly, and the area difference between the piston cavity and the live column cavity is also increased. In addition, the inner diameter of the live column cavity (inlet) liquid hose is thinner, When the liquid returns to the liquid, it passes through the tee, the hydraulic control check valve, the reversing valve, the stop valve, the liquid return cut-off valve, etc., forming a relatively large total resistance; and the working face of the large mining height hydraulic support is mostly equipped with a large flow rate. For the emulsion pump, the main liquid inlet pipe of the liquid supply system is also thicker. The inner diameter of the rubber hose and the inner diameter of the pipe joint of the column piston cavity liquid supply system are thicker than the inner diameter of the piston cavity liquid return system rubber hose. Due to the above factors, when the column is raised, the piston cavity is formed. The pressurized chamber makes the cylinder mouth part of the column deform and thicken in different degrees. If the thickening value exceeds the compression amount of the guide sleeve sealing ring, it will cause liquid leakage. If permanent deformation occurs, the column will fail.

Utility model content

The utility model hydraulically controlled ring cavity liquid return low resistance integrated valve group system overcomes the deficiencies in the prior art and provides a hydraulic control ring cavity liquid return low resistance integrated valve group which reduces the oil return resistance and ensures that the column does not fail system.

In order to solve the above-mentioned technical problems, the technical solution adopted by the utility model is: the integrated valve group system of hydraulic control ring cavity liquid return and low resistance, including a valve seat and a hydraulic control check valve. Two cavities are arranged in parallel in the valve seat. A hydraulically controlled one-way valve and an alternate one-way valve are correspondingly arranged in each of the cavities. The structure of the alternate one-way valve is: the first joint seat and the second joint seat are respectively arranged on both sides of the valve seat, and the first The joint seat and the second joint seat are sealed with the valve seat. The first joint seat is provided with an oil inlet A, and the second joint seat is provided with an oil return port B. The oil between the first joint seat and the second joint seat A valve core is slidingly arranged in the passage, and the valve core is sealed with the inner wall of the oil passage. A spring is provided between the second joint seat and the valve core. The middle part of the above-mentioned oil passage is connected;

An oil outlet hole is provided on the oil passage between the first joint seat and the valve core, and the oil outlet hole communicates with the end blocking cavity of the hydraulic control check valve through the oil passage on the valve seat, and the hydraulic control check valve The plugged end is fixed on one end of the valve seat by bolts, the other end of the valve seat is provided with a port F, and the bottom of the valve seat is provided with an oil inlet D, which communicates with the oil inlet channel of the hydraulic control check valve. The large spool of the control check valve is provided with a second oil flow port E, and the port F communicates with the second oil flow port E.

Sealing rings are provided on the matching parts of the first joint seat and the second joint seat and the valve seat.

The first oil flow port C communicates with the upper chamber of the column oil cylinder through the first oil pipe, the second oil flow port E communicates with the lower chamber of the column oil cylinder through the second oil pipe, and the port F is connected with a safety valve.

Compared with the prior art, the utility model has the beneficial effects that: the utility model arranges both the alternate check valve and the hydraulic control check valve in the valve seat, and passes the first flow port C and the upper chamber of the column cylinder through The first oil pipe is connected, and the second oil flow port E is connected with the lower cavity of the column oil cylinder through the second oil pipe. When the column is lifted, the high-pressure oil enters the hydraulic control check valve from the oil inlet D, and passes through the second oil flow port. E enters the lower chamber of the column oil cylinder, and the oil in the upper chamber of the column oil cylinder enters the oil passage of the alternate check valve through the first oil flow port C, and is discharged back to the oil tank from the oil return port B. The oil return path is short, and the oil return does not pass through Reversing valves, etc., reduce the oil return resistance, make the oil return smooth, and ensure that the column does not fail.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described further.

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a hydraulic oil circuit diagram when the utility model lifts the column.

Fig. 3 is the hydraulic oil circuit diagram when the column of the utility model is lowered.

In the figure, 1 is the valve seat, 2 is the hydraulic control check valve, 3 is the alternate check valve, 4 is the first joint seat, 5 is the second joint seat, 6 is the valve core, 7 is the spring, 8 is the oil channel , 9 is a blocking end, and 10 is a sealing ring.

Detailed ways

As shown in Fig. 1, Fig. 2 and Fig. 3, the integrated valve group system of the hydraulic control ring chamber with liquid return and low resistance of the utility model includes a valve seat 1 and a hydraulic control check valve 2, and two chambers are arranged in parallel in the valve seat 1 Body, the two cavities are correspondingly provided with a hydraulically controlled one-way valve 2 and an alternate one-way valve 3, the structure of the alternate one-way valve 3 is: the first joint seat 4 and the second joint seat 5 are respectively arranged on the valve On both sides of the seat 1, and the first joint seat 4 and the second joint seat 5 are sealed with the valve seat 1, the first joint seat 4 is provided with an oil inlet A, and the second joint seat 5 is provided with an oil return port B A spool 6 is slidingly arranged in the oil passage between the first joint seat 4 and the second joint seat 5, and the spool 6 is sealed with the inner wall of the oil passage, and a spring is arranged between the second joint seat 5 and the spool 6 7. The upper part of the valve seat 1 is provided with a first oil flow port C, and the first oil flow port C communicates with the middle part of the oil passage;

An oil outlet hole is provided on the oil passage between the first joint seat 4 and the valve core 6, and the oil outlet hole communicates with the end block cavity of the hydraulic control check valve 2 through the oil passage 8 on the valve seat 1, and the hydraulic pressure The blocking end 9 of the control check valve 2 is fixed on one end of the valve seat 1 by bolts, the other end of the valve seat 1 is provided with a port F, the bottom of the valve seat 1 is provided with an oil inlet D, and the oil inlet D is connected to the hydraulic control The oil inlet passages of the one-way valve 2 communicate with each other, and the large spool of the hydraulically controlled one-way valve 2 is provided with a second oil flow port E, and the port F communicates with the second oil flow port E.

Sealing rings 10 are provided at the mating parts of the first joint seat 4 and the second joint seat 5 and the valve seat 1 .

The first oil flow port C communicates with the upper chamber of the column oil cylinder through the first oil pipe, the second oil flow port E communicates with the lower chamber of the column oil cylinder through the second oil pipe, and the port F is connected with a safety valve.

The hydraulic control check valve 2 in the utility model is prior art.

The working process of the utility model: when the column is raised, the operating handle for controlling the reversing of the reversing valve is switched to the position of the rising column, and the high-pressure oil from the oil pump enters the hydraulic control check valve 2 from the oil inlet D through the reversing valve. At this time, the hydraulic control check valve 2 is just an ordinary check valve. The high-pressure oil opens the large spool of the hydraulic control check valve 2 and enters the lower cavity of the column oil cylinder from the second oil flow port E through the second oil pipe, and is received by the column piston. Compression, the oil in the upper cavity of the column oil cylinder enters the oil passage of the alternate check valve 3 from the first flow port C through the first oil pipe, at this time, the valve core 6 blocks the communication between the oil inlet A and the first flow port C , so the oil directly flows into the oil return main line from the oil return port B;

During the column lifting process, if the oil pressure in the lower chamber of the column oil cylinder exceeds the safety value of the safety valve, the oil will flow out from the port F, open the safety valve, and flow back to the oil tank.

When lowering the column, switch the operating handle that controls the reversing of the reversing valve to the lowering column position, and the high-pressure oil from the oil pump enters the alternate check valve 3 from the oil inlet A through the reversing valve, and pushes the valve core 6 to compress the spring 7 And close the oil return port B on the second joint seat 5, the high-pressure oil enters the upper cavity of the column oil cylinder through the first oil flow port C, and the high-pressure oil entering the oil passage of the alternate check valve 3 enters the oil passage 8 through the oil outlet hole , and finally enter the end blocking chamber of the hydraulic control check valve 2, push the ejector rod of the hydraulic control check valve 2, open the large valve core, and make the oil in the lower chamber of the column oil cylinder enter the hydraulic control check valve from the second oil flow port E Valve 2, and then the discharge from the oil inlet D returns to the oil tank through the reversing valve.

The above embodiments of the utility model have been described in detail in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned embodiments. Make various changes below.

Claims (3)

1. the hydraulic control ring cavity returns liquid low-resistance pile-up valve group system, it is characterized in that: comprise valve seat (1) and hydraulic control one-way valve (2), be arranged with two cavitys in the valve seat (1) in parallel, correspondence is provided with hydraulic control one-way valve (2) and replaces one way valve (3) in two described cavitys, the described alternately structure of one way valve (3) is: first plinth (4) and second plinth (5) are separately positioned on the both sides of valve seat (1), and first plinth (4) and second plinth (5) arrange with valve seat (1) sealing, first plinth (4) is provided with oil-in A, second plinth (5) is provided with oil return opening B, slide in the oil duct between first plinth (4) and second plinth (5) and be provided with spool (6), spool (6) arranges with described oil duct inner wall sealing, be provided with spring (7) between second plinth (5) and the spool (6), the top of valve seat (1) is provided with first-class hydraulic fluid port C, and first-class hydraulic fluid port C communicates with the middle part of described oil duct;

Oil duct between described first plinth (4) and the spool (6) is provided with oil outlet, described oil outlet is communicated with the stifled chamber of the end of hydraulic control one-way valve (2) by the oily passage (8) on the valve seat (1), the stifled end (9) of hydraulic control one-way valve (2) is by being bolted to an end of valve seat (1), the other end of valve seat (1) is provided with port F, the bottom of valve seat (1) is provided with oil-in D, oil-in D communicates with the oil inlet passage of hydraulic control one-way valve (2), the big valve core of hydraulic control one-way valve (2) is provided with the second oily head piece E, and described port F communicates with the second oily head piece E.

2. hydraulic control ring cavity according to claim 1 returns liquid low-resistance pile-up valve group system, it is characterized in that: described first plinth (4) and second plinth (5) are provided with sealing ring (10) with the auxiliary section of valve seat (1).

3. hydraulic control ring cavity according to claim 1 returns liquid low-resistance pile-up valve group system, it is characterized in that: described first-class hydraulic fluid port C is communicated with by first oil pipe with the epicoele of column oil cylinder, the described second oily head piece E is communicated with by second oil pipe with the cavity of resorption of column oil cylinder, and described port F is connected with safety valve.

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