Stacked overflow valve with buffering function

Abstract

The utility model discloses a stacked overflow valve with a buffering function, which relates to the technical field of stacked overflow valves and comprises a valve body, an adjusting cylinder is arranged on the outer surface of the front end of the valve body, and an adjusting rotating handle is arranged on the outer surface of one end of the adjusting cylinder. Fixing holes, first oil guide holes and second oil guide holes are formed in the outer surfaces of the two ends of the valve body, and the fixing holes are located around the first oil guide holes and the second oil guide holes. According to the stacked overflow valve with the buffering function, the arranged buffering spring can achieve the buffering effect on the main valve element when the stacked overflow valve is used, after the main valve element loses pressure, the first limiting spring rebounds and resets the main valve element, at the moment, the main valve element drives the pressing block to move in the side groove, and therefore the main valve element is prevented from being damaged. And the side groove compresses the buffer spring, so that the buffer effect can be achieved through the buffer spring, the main valve element can be prevented from impacting the valve body to cause abrasion, and the using effect can be guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of superimposed overflow valve, specifically relates to a superimposed overflow valve with buffer function. BACKGROUND

[0002] Superimposed overflow valve is a kind of hydraulic control element, it is mainly used to control the flow and pressure of hydraulic oil in hydraulic system, its working principle is similar to ordinary overflow valve, but multiple joint work spools are used in its interior, more flexible control can be realized, but the existing superimposed overflow valve has certain inconvenience when using.

[0003] First, the spool in the superimposed overflow valve is shrunk by spring when being pressed, when the pressure disappears, the spring will directly rebound the spool, the spool does not have buffering effect and is easy to wear, which can cause poor internal sealing effect, second, when connecting the return pipeline, the sealing effect of pipeline and oil hole is general, and oil leakage is easy to occur after long time use, for this reason, we propose a superimposed overflow valve with buffer function. UTILITY MODEL CONTENTS

[0004] The utility model mainly aims at providing a superimposed overflow valve with buffer function, which can effectively solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows: a superimposed overflow valve with buffer function, including valve body, the front end outer surface of valve body is provided with adjusting cylinder, the outer surface of one end of adjusting cylinder is provided with adjusting handle, the outer surfaces of both ends of valve body are provided with fixed hole, first oil guide hole and second oil guide hole, the fixed hole is located around first oil guide hole and second oil guide hole, the first oil guide hole is located at one side of second oil guide hole, the outer surface of one end of first oil guide hole is detachably connected with sealing cylinder, the rear end outer surface of valve body is provided with inlet hole, the middle part of valve body is provided with front end cavity and rear end cavity, the front end cavity is located at one side of rear end cavity, the middle part of front end cavity is provided with main spool, first limiting spring is arranged between main spool and front end cavity, the middle part of piston is provided with needle valve, second limiting spring is arranged between needle valve and piston, the outer surface of one end of piston is provided with adjusting rod, the inner wall of front end cavity is provided with side groove, the outer wall of main spool is provided with pressing block, buffer spring is arranged between pressing block and side groove.

[0006] Preferably, the inner wall of sealing cylinder is provided with built-in groove, the outer wall of sealing cylinder is provided with air nozzle, and the middle part of built-in groove is provided with annular air bag.

[0007] Preferably, the main valve core is movably connected with the front end inner cavity through a first limiting spring, and the front end of the main valve core is provided with a damping hole.

[0008] Preferably, the needle valve is movably connected with the piston through a second limiting spring, and the adjusting rod is connected with the adjusting handle.

[0009] Preferably, the front end inner cavity and the side groove are integrally formed, and the pressing block is movably connected with the side groove through a buffer spring.

[0010] Preferably, the sealing cylinder and the built-in groove are integrally formed, and the air nozzle and the annular air bag are through structures.

[0011] Compared with the prior art, the utility model has the advantages of:

[0012] The buffer spring set can buffer the main valve core in use, the first limiting spring can reset the main valve core when the pressure of the main valve core is lost, the main valve core can drive the pressing block to move in the side groove, and the side groove can compress the buffer spring, so that the buffer spring can buffer, the main valve core can avoid colliding with the valve body to generate abrasion, and the use effect can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a whole structure schematic view of the utility model;

[0014] Figure 2 It is an internal structure view of the valve body of the utility model;

[0015] Figure 3 It is a partial enlarged view of the internal structure of the valve body of the utility model;

[0016] Figure 4 It is an internal structure view of the sealing cylinder of the utility model.

[0017] In the drawing: 1, valve body; 2, adjusting cylinder; 3, adjusting handle; 4, fixed hole; 5, first oil guide hole; 6, second oil guide hole; 7, sealing cylinder; 8, lead-in hole; 9, front end inner cavity; 10, rear end inner cavity; 11, main valve core; 12, first limiting spring; 13, piston; 14, needle valve; 15, second limiting spring; 16, adjusting rod; 17, side groove; 18, pressing block; 19, buffer spring; 20, built-in groove; 21, air nozzle; 22, annular air bag. DETAILED DESCRIPTION

[0018] In order to make the technical personnel of the prior art better understand the technical scheme of the utility model, the utility model will be further described in detail below in combination with the drawings.

[0019] As Figures 1-4 shown, the utility model embodiment provides a kind of superimposed overflow valve with buffer function, including valve body 1, the front end outer surface of valve body 1 is provided with adjusting cylinder 2, the outer surface of one end of adjusting cylinder 2 is provided with adjusting handle 3, the outer surface of both ends of valve body 1 is provided with fixed hole 4, first oil guide hole 5 and second oil guide hole 6, fixed hole 4 is located around first oil guide hole 5 and second oil guide hole 6, first oil guide hole 5 is located in the side of second oil guide hole 6, the outer surface of one end of first oil guide hole 5 is detachably connected with sealing cylinder 7, the rear end outer surface of valve body 1 is provided with import hole 8, the middle part of valve body 1 is provided with front end cavity 9 and rear end cavity 10, front end cavity 9 is located in the side of rear end cavity 10, the middle part of front end cavity 9 is provided with main valve core 11, first limiting spring 12 is arranged between main valve core 11 and front end cavity 9, the middle part of rear end cavity 10 is provided with piston 13, the middle part of piston 13 is provided with needle valve 14, second limiting spring 15 is arranged between needle valve 14 and piston 13, the outer surface of one end of piston 13 is provided with adjusting rod 16, the inner wall of front end cavity 9 is provided with side groove 17, the outer wall of main valve core 11 is provided with pressing block 18, buffer spring 19 is arranged between pressing block 18 and side groove 17.

[0020] Specifically, in the embodiment, the valve body 1 is provided with an adjusting cylinder 2 at the front end of the outer surface, an adjusting handle 3 is arranged at one end of the outer surface of the adjusting cylinder 2, a fixed hole 4, a first oil guide hole 5 and a second oil guide hole 6 are arranged at the outer surface of both ends of the valve body 1, the fixed hole 4 is located around the first oil guide hole 5 and the second oil guide hole 6, the first oil guide hole 5 is located on one side of the second oil guide hole 6, a sealing cylinder 7 is detachably connected to one end of the outer surface of the first oil guide hole 5, a guide hole 8 is arranged at the rear end of the outer surface of the valve body 1, a front end cavity 9 and a rear end cavity 10 are arranged at the middle part of the valve body 1, the front end cavity 9 is located on one side of the rear end cavity 10, a main valve core 11 is arranged at the middle part of the front end cavity 9, a first limiting spring 12 is arranged between the main valve core 11 and the front end cavity 9, a piston 13 is arranged at the middle part of the rear end cavity 10, a needle valve 14 is arranged at the middle part of the piston 13, a second limiting spring 15 is arranged between the needle valve 14 and the piston 13, an adjusting rod 16 is arranged at one end of the outer surface of the piston 13, a side groove 17 is arranged on the inner wall of the front end cavity 9, a pressing block 18 is arranged on the outer wall of the main valve core 11, a buffer spring 19 is arranged between the pressing block 18 and the side groove 17, the buffer spring 19 can buffer the main valve core 11 during use, when the main valve core 11 loses pressure, the first limiting spring 12 can reset the main valve core 11, at this time, the main valve core 11 can drive the pressing block 18 to move in the side groove 17, and the side groove 17 can compress the buffer spring 19, so that the buffer spring 19 can buffer the effect, which can avoid the main valve core 11 from colliding with the valve body 1 to generate abrasion, and can guarantee the use effect.

[0021] The utility model provides a kind of superimposed overflow valve with buffering function, the buffer spring 19 arranged in use can play the effect of buffering to main valve core 11, when main valve core 11 loses pressure, first limiting spring 12 will carry out rebound reset to main valve core 11, at this time, main valve core 11 will drive pressing block 18 to move in side groove 17, and make side groove 17 compress buffer spring 19, so that the buffer spring 19 can play the effect of buffering, which can avoid main valve core 11 from colliding with valve body 1 to generate abrasion, and can guarantee use effect.

[0022] In one embodiment of the utility model, the inner wall of the sealing cylinder 7 is provided with an inner groove 20, the outer wall of the sealing cylinder 7 is provided with an air nozzle 21, the middle part of the inner groove 20 is provided with an annular air bag 22, the sealing cylinder 7 can be convenient for oil hole external oil conveying pipeline in use, after oil conveying pipeline is inserted into sealing cylinder 7 and is connected with oil hole, annular air bag 22 can be inflated by air nozzle 21 to the annular air bag 22, so that annular air bag 22 can be inflated in inner groove 20, after annular air bag 22 is inflated, it can fill the gap between inner groove 20 and oil conveying pipeline, and can play better sealing property, and can guarantee the stability of oil conveying pipeline connection, and can avoid the situation of oil leakage when being used for a long time.

[0023] In another embodiment of the utility model, the main valve core 11 is movably connected with the front end inner cavity 9 through the first limiting spring 12, the front end of the main valve core 11 is provided with a damping hole, and the damping hole can play a damping effect on the overflowing oil when in use.

[0024] In another embodiment of the utility model, the needle valve 14 is movably connected with the piston 13 through the second limiting spring 15, the adjusting rod 16 is connected with the adjusting handle 3, the adjusting handle 3 can adjust the position of the piston 13 through the adjusting rod 16 when in use, so that the damping force of the needle valve 14 can be conveniently adjusted.

[0025] In one embodiment of the utility model, the front end inner cavity 9 and the side groove 17 are integrally formed, the pressing block 18 is movably connected with the side groove 17 through the buffer spring 19, and the buffer spring 19 mainly plays a buffering protection effect on the main valve core 11 when in use.

[0026] In another embodiment of the utility model, the sealing cylinder 7 and the built-in groove 20 are integrally formed, the air nozzle 21 and the annular air bag 22 are in a through structure, and the annular air bag 22 mainly plays a sealing and clamping effect when in use.

[0027] It should be noted that the utility model is a superimposed overflow valve with a buffering function, and the overflowing oil enters the valve body 1 through the inlet hole 8 when in use, at this time, the oil passes through the damping hole in the front end of the main valve core 11 and enters the inside of the front end inner cavity 9, as the pressure of the oil in the front end inner cavity 9 increases, the oil pushes the needle valve 14 blocked in the front end of the rear end inner cavity 10 to move backward, so that the needle valve 14 compresses the second limiting spring 15 for recovery, at this time, the oil enters the rear end inner cavity 10 and flows out through the channel of the second oil guide hole 6, when the oil pressure continues to increase, the main valve core 11 moves backward under the action of the pressure and compresses the first limiting spring 12, at this time, the channel of the first oil guide hole 5 is opened, and the oil can flow out from the first oil guide hole 5, when the main valve core 11 loses the pressure, the first limiting spring 12 rebounds and resets the main valve core 11, at this time, the main valve core 11 drives the pressing block 18 to move in the side groove 17, and the side groove 17 compresses the buffer spring 19, so that the buffer spring 19 plays a buffering effect, the main valve core 11 can be prevented from colliding with the valve body 1 to cause abrasion, the use effect can be guaranteed, the sealing cylinder 7 can conveniently connect the oil hole with the oil delivery pipeline when in use, after the oil delivery pipeline is inserted into the sealing cylinder 7 and connected with the oil hole, the annular air bag 22 is inflated through the air nozzle 21, the annular air bag 22 expands in the built-in groove 20, the annular air bag 22 expands to fill the gap between the built-in groove 20 and the oil delivery pipeline, a better sealing property can be achieved, the stability of the oil delivery pipeline connection can be guaranteed, and the oil leakage during long-time use can be avoided, and the utility model is practical.

[0028] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A stacked relief valve with buffering function, comprising a valve body (1), characterized in that: The outer surface of the front end of the valve body (1) is provided with an adjusting cylinder (2), one end of the outer surface of the adjusting cylinder (2) is provided with an adjusting handle (3), the outer surface of both ends of the valve body (1) is provided with a fixed hole (4), a first oil guide hole (5) and a second oil guide hole (6), the fixed hole (4) is located around the first oil guide hole (5) and the second oil guide hole (6), the first oil guide hole (5) is located on one side of the second oil guide hole (6), one end of the outer surface of the first oil guide hole (5) is detachably connected with a sealing cylinder (7), the rear end of the outer surface of the valve body (1) is provided with an inlet hole (8), the middle part of the valve body (1) is provided with a front end cavity (9) and a rear end cavity (10), the front end cavity (9) is located on one side of the rear end cavity (10), the middle part of the front end cavity (9) is provided with a main valve core (11), the first limiting spring (12) is arranged between the main valve core (11) and the front end cavity (9), the middle part of the piston (13) is provided with a needle valve (14), the second limiting spring (15) is arranged between the needle valve (14) and the piston (13), one end of the outer surface of the piston (13) is provided with an adjusting rod (16), the inner wall of the front end cavity (9) is provided with a side groove (17), the outer wall of the main valve core (11) is provided with a pressing block (18), the buffer spring (19) is arranged between the pressing block (18) and the side groove (17).

2. The stacked relief valve with buffering function according to claim 1, characterized in that: The inner wall of the sealing cylinder (7) is provided with an inner groove (20), the outer wall of the sealing cylinder (7) is provided with an air nozzle (21), and the middle part of the inner groove (20) is provided with an annular air bag (22).

3. The stacked relief valve with buffering function according to claim 1, characterized in that: The main valve core (11) is movably connected with the front end cavity (9) through the first limiting spring (12), and the front end of the main valve core (11) is provided with a damping hole.

4. The stacked relief valve with buffering function according to claim 1, characterized in that: The needle valve (14) is movably connected with the piston (13) through the second limiting spring (15), and the adjusting rod (16) is connected with the adjusting handle (3).

5. The stacked relief valve with buffering function according to claim 1, characterized in that: The front end cavity (9) and the side groove (17) are an integral molding structure, and the pressing block (18) is movably connected with the side groove (17) through the buffer spring (19).

6. The stacked relief valve with buffering function according to claim 2, characterized in that: The sealing cylinder (7) and the inner groove (20) are an integral molding structure, and the air nozzle (21) and the annular air bag (22) are a through structure.

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