CN2835699Y - a liquid gas buffer - Google Patents

Abstract

The utility model relates to a liquid-gas buffer belongs to the safety device field of jack-up, loading and unloading machinery, elevator and mine car. The hydraulic buffer is composed of a cylinder part arranged outside the piston part, a throttle valve arranged inside the piston part, a piston rod part arranged at one end of the piston part and a guide sleeve part arranged at one end of the cylinder part. The buffer is filled with hydraulic oil in the cylinder inner cavity to form a liquid cavity, the right inner cavity of the piston cylinder is filled with nitrogen to form a gas cavity, and the gas cavity is arranged on the right side of the liquid cavity. The cylinder barrel part consists of a cylinder body, a screw plug and a sealing ring which are arranged in a central hole at the left end of the cylinder body; the piston rod component is arranged in the inner cavity of the cylinder body and consists of a throttle valve, a guide ring, a sealing ring, a piston cylinder and an air valve; the liquid-gas buffer has novel structure, simple structure, good manufacturability and good buffer characteristic. The buffer can be used for buffering impact when running collision of hoisting machinery, loading and unloading machinery, elevators and mine cars.

Description

a liquid gas buffer

Technical field The utility model relates to a liquid-gas buffer, which belongs to the field of safety devices for hoisting, loading and unloading machinery, elevators and mine cars.

Background technology At present, there are several types of liquid-gas buffers: 1. Buffering depends on the gap between the buffer mandrel and the piston. In this way, on the one hand, there are strict requirements on the processing and installation of the buffer mandrel, and on the other hand, the design is difficult. 2. Rely on the dense buffer holes in the cylinder for buffering. It is also difficult to design, it is difficult to accurately calculate the size and distribution of each hole, and the cushioning characteristics cannot be adjusted.

SUMMARY OF THE INVENTION The purpose of this utility model is to overcome the shortcomings of the existing related liquid-gas buffers, and provide a liquid-gas buffer that relies on a throttle valve for buffering. The buffer has two chambers, a liquid chamber and a gas chamber. The cushioning performance is better improved, the cushioning characteristics are more reasonable, and the rebound force is small. The structure is novel, the structure is simple, the manufacturability is good, and the cushioning property is good.

The technical scheme adopted in the utility model is: a liquid-gas buffer, which consists of a cylinder part I installed outside the piston part IV, a throttle valve II installed inside the piston part IV, and a piston installed at one end of the piston part IV. The rod part III is composed of a guide sleeve part V mounted on one end of the cylinder part I. The buffer is filled with hydraulic oil in the inner chamber of the cylinder body 3 to form a liquid chamber A, and the right inner chamber of the piston cylinder 17 is filled with nitrogen to become a gas chamber B, which is on the right side of the liquid chamber A.

Cylinder part I is composed of cylinder body 3, screw plug 1 and sealing ring 2 installed in the center hole of the left end of cylinder body 3; piston rod part III installed in the inner cavity of cylinder body 3 is composed of throttle valve II, guide ring 6 , sealing ring 7, piston barrel 17, and air valve 18; the guide ring 6 and sealing ring 7 are respectively installed in two ring grooves on the outer cylindrical surface of the left part of the piston barrel 17, and the air valve 18 is installed on the upper right end of the piston barrel 17 ; The throttle valve II installed on the left end of the piston rod part III is composed of a valve seat 4, a valve core 5, a disc spring 9 and a valve body 8; the front part of the valve core 5 is conical and inserted in the valve seat 4, and the rear part is cylindrical , the disc spring 9 is installed at the rear of the valve core 5, the valve seat 4 and the valve core 5 are installed in the valve body 8, the valve body 8 is installed in the left inner cavity of the piston cylinder 17, and is fixed on the head of the piston cylinder 17 by threads ; The piston part IV contained in the piston cylinder 17 is made up of sealing ring 10, guide ring 11, piston body 12; guide ring 11 and sealing ring 10 are installed on the piston body 12 respectively; Cover 14, dust-proof ring 16 are formed, guide ring 13, dust-proof ring 16 are installed on the guide sleeve 14, and guide sleeve 14 is fixed on the cylinder block 3 with bolt 15; See accompanying drawing 1.

The beneficial effects of the utility model: due to the adoption of the throttle valve, the cushioning performance can be adjusted with the adjustment of the disc spring. After the end of buffering, the buffer can be made without resilience, so that the buffering characteristics are more reasonable. The structure is simple. It is widely used. It can be used to cushion the impact of hoisting machinery, loading and unloading machinery, elevators and mining vehicles when they collide.

Description of the drawings Figure 1 - Sectional view of the liquid-gas buffer; in the figure: I. Cylinder part, II. Throttle valve, III. Piston rod part, IV. Piston part, V. Guide sleeve part 1. Screw plug, 2 .Seal ring, 3. Cylinder body, 4. Valve seat, 5. Valve core, 6. Guide ring, 7. Seal ring, 8. Valve body, 9. Disc spring, 10. Seal ring, 11. Guide ring, 12 .Piston, 13. Guide ring, 14. Guide sleeve, 15. Screw, 16. Dust ring, 17. Piston rod, 18. Air valve, A. Oil chamber, B. Air chamber.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Take the attached drawings as an example to illustrate the specific implementation: when in use, when the outer end of the piston rod part III of the liquid-pneumatic buffer is subjected to an impact force, the piston rod 17 moves to the oil chamber in the cylinder barrel I, compressing the oil chamber At this time, the oil pressure of the oil chamber rises sharply under the action of external force, and the hydraulic oil opens the spool 5 of the throttle valve II under the action of high pressure, and the hydraulic oil enters the inner cavity of the piston rod 17 through the throttle valve II, and pushes the piston The piston 12 in the rod compresses the air cavity, so that the mechanical energy during the impact can be changed into the heat energy of hydraulic oil and gas, thereby playing the role of cushioning the impact.

When the impact force is relatively small or the impact speed is relatively small, the energy of the impact is not enough to open the spool 5 of the throttle valve II. At this time, the hydraulic oil enters the inner cavity of the piston rod 17 through the small gap between the spool 5 and the valve seat 4. , Compress the air cavity, thus playing a buffer role. When the impact force is relatively large, the large impact energy will open the spool 5 of the throttle valve II, and the hydraulic oil will enter the inner cavity of the piston rod 17 through the large gap between the spool 5 and the valve seat 4, compressing the air cavity, thereby relieving The peak value when the impact is violent has been improved, and the cushioning characteristics have been improved to make it more reasonable. When the buffer is over, the throttle valve is closed, and the gap between the valve core and the valve seat of the throttle valve is very small after closing, and the hydraulic oil flows back to the liquid chamber through the small gap under the action of the compressed gas. Return the buffer to its original state. Since the gap between the valve core and the valve seat is very small during recovery, there is very little recovery oil, so that the rebound force is very small, and it can be called a rebound-free buffer.

Claims (1)

1, a kind of hydro-pneumatic buffer by the cylinder components (I) that is contained in piston element (IV) outside, the guide sleeve parts (V) that are contained in the inner throttle valve (II) of piston element (IV), are contained in the piston rod part (III) of piston element (IV) end and are contained in cylinder components (I) end form, it is characterized in that, buffer is full of hydraulic oil in cylinder body (3) inner chamber become liquid container (A), the right inner chamber of piston cylinder (17) is full of nitrogen becomes air chamber (B), and air chamber (B) is on the right side of liquid container (A);

Cylinder components (I) is made up of cylinder body (3) and the plug screw (1) and the seal ring (2) that are installed in cylinder body (3) the left end center hole; The piston rod part (III) that is contained in cylinder body (3) inner chamber is made up of throttle valve (II), guide ring (6), seal ring (7), piston cylinder (17), air valve (18); Guide ring (6) and seal ring (7) are installed in respectively in two annular grooves of piston cylinder (17) left part external cylindrical surface, and air valve (18) is contained in the upper right side of piston cylinder (17); The throttle valve (II) that is contained in piston rod part (III) left end is made up of valve seat (4), spool (5), dish spring (9), valve body (8); Spool (5) is anterior to be coniform being inserted in the valve seat (4), the rear portion is a column, dish spring (9) is installed in spool (5) rear portion, valve seat (4) and spool (5) are contained in the valve body (8), valve body (8) is contained in the left part inner chamber of piston cylinder (17), be fixed on piston cylinder (17) head by screw thread, the piston element (IV) that is contained in the piston cylinder (17) is made up of seal ring (10), guide ring (11), piston body (12); Guide ring (11) and seal ring (10) are contained in respectively on the piston body (12); Guide sleeve parts (V) are made up of guide ring (13), guide sleeve (14), dust ring (16), and guide ring (13), dust ring (16) are installed on the guide sleeve (14), and guide sleeve (14) is fixed on the cylinder body (3) with bolt (15).

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