Overflow valve with high pressure resistance

Abstract

The utility model provides an overflow valve with high pressure resistance. The overflow valve with the high pressure resistance comprises a shell and an input pipe, a damping sleeve is movably connected in the shell in a sleeved mode, a movable piston is movably connected in the damping sleeve in a sleeved mode, a flow guide hole is formed in the side face of the movable piston, and a connecting pipe is fixedly connected to the side face of the shell in a sleeved mode. According to the overflow valve with the high pressure resistance, due to the fact that the sealing plug is arranged, when liquid constant-pressure overflow needs to be conducted, hydraulic oil is injected into the damping sleeve, when the pressure intensity of liquid in the connecting pipe is instantly increased, the sealing plug can drive the movable piston to horizontally move through the positioning column, and then the hydraulic oil is extruded; at the moment, hydraulic oil in the damping sleeve can flow at a constant speed through the flow guide hole, the effect that the spring stretches out and draws back at a constant speed is achieved, namely the compressive strength of the spring is achieved, the problem that the service life is greatly shortened when the spring stretches out and draws back frequently and rapidly is solved, and therefore the service life of the overflow valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of overflow valves, in particular to an overflow valve with strong pressure resistance. Background Art

[0002] The relief valve is a hydraulic pressure control valve that mainly plays the role of constant pressure relief, pressure stabilization, system unloading and safety protection in hydraulic equipment. During use, the relief valve may fail in many ways, and the majority of failures are mainly caused by noise and vibration. The main reason is that the pressure is uneven. There are many reasons for the uneven pressure of the hydraulic oil in the relief valve. The presence of bubbles in the hydraulic oil is one of the reasons for the uneven pressure in the hydraulic system. The presence of more gas in the hydraulic oil causes uneven hydraulic oil pressure in the relief valve, which in turn causes noise and vibration failures in the relief valve, affecting the stability of the hydraulic system and the service life of the relief valve. Existing relief valves lack a structure to eliminate gas in the oil, and the use effect is average.

[0003] Existing technology, such as the "A Relief Valve" (China Authorization Publication No. CN220667983U), includes a relief valve body with an oil inlet, which includes a sealing ring, an oil inlet pipe, and a connecting flange. A vacuum sleeve is provided on the outside of a section of the oil inlet pipe, which is provided with a vacuum outlet. The oil inlet pipe located inside the vacuum sleeve is a microporous air-permeable tube. The structure of the oil inlet pipe effectively draws out gas from the hydraulic oil, thereby reducing the gas content within the hydraulic oil. This results in a low gas content in the hydraulic oil during use of the relief valve, more stable hydraulic oil pressure, and a lower failure rate.

[0004] When performing liquid constant pressure overflow in the existing technology, since the overflow valve usually uses a spring to pressurize the closing plug, when the internal pressure of the overflow valve fluctuates violently, it is easy to drive the spring to frequently expand and contract, which in turn leads to a significant reduction in the service life of the spring, that is, the service life of the overflow valve is reduced.

[0005] Therefore, it is necessary to provide a relief valve with strong pressure resistance to solve the above technical problems. Utility Model Content

[0006] The utility model provides a relief valve with strong pressure resistance, which solves the problem that the relief valve usually uses a spring to pressurize the closing plug, which makes it easy to drive the spring to frequently expand and contract when the internal pressure of the relief valve fluctuates violently, thereby greatly reducing the service life of the spring, that is, reducing the service life of the relief valve.

[0007] In order to solve the above technical problems, the utility model provides a pressure-resistant overflow valve, comprising a shell and an input pipe, the shell having an internal movably sleeved damping sleeve, the damping sleeve having an internal movably sleeved movable piston, the side of the movable piston having a guide hole, the side of the shell having a fixed sleeved connecting pipe, the side of the movable piston having a fixed connection with a positioning column, one end of the positioning column having a fixed sleeved closing plug, the internal movably sleeved spring of the damping sleeve, the side of the shell having a threaded sleeve having a threaded sleeve, the external fixed sleeve of the closing plug having a sealing sleeve, the external movably sleeved mounting sleeve of the connecting pipe, the bottom of the shell having a fixed sleeved discharge pipe, the external fixed sleeve of the connecting pipe having a clamping ring, one end of the connecting pipe having a fixed sleeved sealing ring, the outside of the mounting sleeve having an anti-slip groove, one end of the input pipe having a fixed sleeved filter, and the internal fixed sleeve of the shell having a partition.

[0008] Preferably, the closing plug is movably sleeved on the side of the connecting pipe, and the front shape of the closing plug is conical.

[0009] Preferably, one end of the threaded column is movably sleeved on the side surface of the damping sleeve, and the threaded column is located in the middle of the side surface of the damping sleeve.

[0010] Preferably, the sealing sleeve is adapted to the connecting pipe, and the sealing sleeve is made of rubber material.

[0011] Preferably, the mounting sleeve is threadedly sleeved on the outside of the input pipe, and the mounting sleeve is movably sleeved on the outside of the clamping ring.

[0012] Preferably, the sealing ring is tightly pressed against the side of the input pipe, and the sealing ring is made of rubber material.

[0013] Preferably, there are several anti-slip grooves, and the several anti-slip grooves are evenly distributed on the outside of the mounting sleeve.

[0014] Preferably, the diameter of the filter screen is the same as the diameter of the connecting pipe, and the filter screen is made of stainless steel.

[0015] Compared with the related art, the relief valve with strong pressure resistance provided by the present invention has the following beneficial effects:

[0016] After the jack is up, the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up, and the jack is up

[0017] By setting a threaded column, when the overflow pressure of the overflow valve is adjusted, the threaded column is rotated so that the threaded column can drive the damping sleeve to move horizontally, that is, drive the spring to move horizontally, so that the spring can drive the closing plug to be tightly squeezed on the side of the connecting pipe through the positioning column, thereby achieving the effect of adjusting the spring compression, that is, achieving the effect of adjusting the pressure on the side of the connecting pipe by the closing plug, thereby achieving the effect of adjusting the overflow pressure of the overflow valve, that is, improving the practicality of the overflow valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a preferred embodiment of a pressure-resistant relief valve provided by the utility model;

[0019] Figure 2 for Figure 1 A front view of a relief valve with strong pressure resistance is shown;

[0020] Figure 3 for Figure 1 A front view of a sealing plug in a relief valve with high pressure resistance is shown;

[0021] Figure 4 for Figure 1 A front view of a connecting pipe in a pressure-resistant relief valve is shown.

[0022] Numbers in the figure: 1. Shell; 2. Input pipe; 3. Damping sleeve; 4. Moving piston; 5. Diversion hole; 6. Connecting pipe; 7. Positioning column; 8. Closing plug; 9. Spring; 10. Threaded column; 11. Sealing sleeve; 12. Mounting sleeve; 13. Discharge pipe; 14. Clamping ring; 15. Sealing ring; 16. Anti-slip groove; 17. Filter screen; 18. Partition. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and implementation examples.

[0024] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 ,in, Figure 1A schematic structural diagram of a preferred embodiment of a pressure-resistant relief valve provided by the utility model; Figure 2 for Figure 1 A front view of a relief valve with strong pressure resistance is shown; Figure 3 for Figure 1 A front view of a sealing plug in a relief valve with high pressure resistance is shown; Figure 4 for Figure 1 The figure shows a front view of a connecting pipe in a high-pressure-resistance relief valve. A high-pressure-resistance relief valve comprises a housing 1 and an input pipe 2. A damping sleeve 3 is movably sleeved inside the housing 1. A movable piston 4 is movably sleeved inside the damping sleeve 3. A flow guide hole 5 is provided on the side of the movable piston 4. A connecting pipe 6 is fixedly sleeved on the side of the housing 1. A positioning column 7 is fixedly connected to the side of the movable piston 4. A closing plug 8 is fixedly sleeved on one end of the positioning column 7. A spring 9 is movably sleeved inside the damping sleeve 3. A threaded column 10 is threadedly sleeved on the side of the housing 1. A sealing sleeve 11 is fixedly sleeved on the outside of the closing plug 8. A mounting sleeve 12 is movably sleeved on the outside of the connecting pipe 6. A discharge pipe 13 is fixedly sleeved on the bottom of the housing 1. A clamping ring 14 is fixedly sleeved on the outside of the connecting pipe 6. A sealing ring 15 is fixedly sleeved on one end of the connecting pipe 6. An anti-slip groove 16 is provided on the outside of the mounting sleeve 12. A filter screen 17 is fixedly sleeved on one end of the input pipe 2. A partition 18 is fixedly sleeved inside the housing 1.

[0025] The closing plug 8 is movably sleeved on the side of the connecting pipe 6, and the front shape of the closing plug 8 is conical; by setting the closing plug 8, when liquid constant pressure overflow is required, the hydraulic oil is injected into the inside of the damping sleeve 3, so that when the liquid pressure inside the connecting pipe 6 is instantly increased, the closing plug 8 is able to drive the movable piston 4 to move horizontally through the positioning column 7 and thus squeeze the hydraulic oil. At this time, the hydraulic oil inside the damping sleeve 3 is able to flow at a uniform speed through the guide hole 5, thereby achieving the effect of uniform expansion and contraction of the spring 9, that is, achieving the compressive strength of the spring 9, thereby avoiding the problem of greatly reduced service life due to frequent and rapid expansion and contraction of the spring 9, thereby improving the service life of the overflow valve.

[0026] One end of the threaded column 10 is movably connected to the side of the damping sleeve 3, and the threaded column 10 is located in the middle of the side of the damping sleeve 3; by setting the threaded column 10, when the overflow pressure of the overflow valve is adjusted, the threaded column 10 is rotated so that the threaded column 10 can drive the damping sleeve 3 to move horizontally, that is, drive the spring 9 to move horizontally, so that the spring 9 can drive the closing plug 8 to be tightly squeezed on the side of the connecting pipe 6 through the positioning column 7, thereby achieving the effect of adjusting the compression degree of the spring 9, that is, achieving the effect of adjusting the side pressure of the connecting pipe 6 by the closing plug 8, thereby achieving the effect of adjusting the overflow pressure of the overflow valve, that is, improving the practicality of the overflow valve.

[0027] The sealing sleeve 11 is adapted to the connecting tube 6, and the material of the sealing sleeve 11 is rubber material; by providing the sealing sleeve 11, when the connecting tube 6 is sealed, the closing plug 8 can drive the sealing sleeve 11 to be tightly squeezed against the side of the connecting tube 6, thereby improving the sealing between the closing plug 8 and the connecting tube 6, and thus avoiding the problem of liquid inside the connecting tube 6 penetrating from the gap between the closing plug 8 and the connecting tube 6.

[0028] The mounting sleeve 12 is threadedly sleeved on the outside of the input pipe 2, and the mounting sleeve 12 is movably sleeved on the outside of the clamping ring 14; by providing the mounting sleeve 12, when the relief valve needs to be installed and fixed, the mounting sleeve 12 is rotated so that the mounting sleeve 12 is threadedly sleeved on the outside of the input pipe 2, so that the input pipe 2 can be tightly squeezed on the other end of the connecting pipe 6, thereby achieving the connection effect between the input pipe 2 and the connecting pipe 6, that is, achieving the installation and fixing effect of the relief valve.

[0029] The sealing ring 15 is tightly squeezed on the side of the input pipe 2, and the material of the sealing ring 15 is rubber material; by providing the sealing ring 15, when the input pipe 2 and the connecting pipe 6 are connected, the sealing ring 15 can fill the gap between the input pipe 2 and the connecting pipe 6, thereby avoiding the problem of poor sealing of the connecting pipe 6 due to the low adaptability of the input pipe 2 and the connecting pipe 6, thereby improving the airtightness inside the connecting pipe 6.

[0030] There are several anti-slip grooves 16, which are evenly distributed on the outside of the mounting sleeve 12. By setting the anti-slip grooves 16, when the relief valve is installed and fixed, the anti-slip grooves 16 can greatly improve the roughness of the surface of the mounting sleeve 12, thereby avoiding the problem that the surface of the mounting sleeve 12 is relatively smooth, making it difficult to manually rotate the mounting sleeve 12, thereby improving the convenience of installing and fixing the relief valve.

[0031] The diameter of the filter 17 is the same as the diameter of the connecting pipe 6, and the material of the filter 17 is stainless steel; by setting the filter 17, when the liquid constant pressure overflow is performed, the filter 17 can filter the liquid entering the connecting pipe 6, so that the impurities inside the liquid can be blocked to the outside of the connecting pipe 6, thereby avoiding the problem of impurities entering the connecting pipe 6 along with the liquid and causing the overflow valve to be blocked, thereby improving the internal smoothness of the overflow valve when it is working.

[0032] The working principle of the overflow valve with strong pressure resistance provided by the utility model is as follows:

[0033] The first step: First, when liquid constant pressure overflow is required, the hydraulic oil is injected into the damping sleeve 3, so that when the liquid pressure inside the connecting pipe 6 is instantly increased, the closing plug 8 is able to drive the movable piston 4 to move horizontally through the positioning column 7 and thus squeeze the hydraulic oil. At this time, the hydraulic oil inside the damping sleeve 3 is able to flow at a uniform speed through the guide hole 5, thereby achieving the effect of uniform expansion and contraction of the spring 9, that is, achieving the compressive strength of the spring 9, thereby avoiding the problem of greatly reduced service life due to frequent and rapid expansion and contraction of the spring 9, thereby improving the service life of the relief valve. When adjusting the relief valve overflow pressure, rotate the threaded column 10 so that the threaded column 10 can drive the damping sleeve 3 to move horizontally, that is, drive the spring 9 to move horizontally, so that the spring 9 can drive the closing plug 8 to be tightly squeezed in the connecting pipe 6 through the positioning column 7. The side surface of the connecting pipe 6 is provided with an adjustment effect of the compression degree of the spring 9, that is, the adjustment effect of the side pressure of the connecting pipe 6 by the closing plug 8 is achieved, thereby achieving the adjustment effect of the overflow pressure of the relief valve, that is, improving the practicality of the relief valve. When the connecting pipe 6 is closed, the closing plug 8 is able to drive the sealing sleeve 11 to be tightly squeezed on the side of the connecting pipe 6, thereby improving the sealing between the closing plug 8 and the connecting pipe 6, thereby avoiding the problem of the internal liquid of the connecting pipe 6 penetrating from the gap between the closing plug 8 and the connecting pipe 6. When the relief valve needs to be installed and fixed, the mounting sleeve 12 is rotated so that the mounting sleeve 12 is threadedly sleeved on the outside of the input pipe 2, so that the input pipe 2 is tightly squeezed on the other end of the connecting pipe 6, thereby achieving the connection effect between the input pipe 2 and the connecting pipe 6, that is, achieving the installation and fixing effect of the relief valve;

[0034] Step 2: When the input pipe 2 is connected to the connecting pipe 6, the sealing ring 15 is able to fill the gap between the input pipe 2 and the connecting pipe 6, thereby avoiding the problem of poor sealing of the connecting pipe 6 due to the low adaptability of the input pipe 2 and the connecting pipe 6, thereby improving the airtightness inside the connecting pipe 6. When the overflow valve is installed and fixed, the anti-slip groove 16 is able to greatly improve the roughness of the surface of the mounting sleeve 12, thereby avoiding the problem that the mounting sleeve 12 is difficult to rotate manually due to the relatively smooth surface of the mounting sleeve 12, thereby improving the convenience of installing and fixing the overflow valve. When the liquid is overflowed at a constant pressure, the filter screen 17 is able to filter the liquid entering the connecting pipe 6, so that the impurities in the liquid are blocked to the outside of the connecting pipe 6, thereby avoiding the problem that impurities enter the connecting pipe 6 along with the liquid and cause the overflow valve to be blocked, thereby improving the internal smoothness of the overflow valve when it is working.

[0035] Compared with the related art, the relief valve with strong pressure resistance provided by the present invention has the following beneficial effects:

[0036] By setting the closing plug 8, when liquid constant pressure overflow is required, hydraulic oil is injected into the inside of the damping sleeve 3, so that when the liquid pressure inside the connecting pipe 6 increases instantly, the closing plug 8 can drive the movable piston 4 to move horizontally through the positioning column 7 and thus squeeze the hydraulic oil. At this time, the hydraulic oil inside the damping sleeve 3 can flow at a uniform speed through the guide hole 5, thereby achieving the effect of uniform expansion and contraction of the spring 9, that is, achieving the compressive strength of the spring 9, thereby avoiding the problem of greatly reduced service life due to frequent and rapid expansion and contraction of the spring 9, thereby improving the service life of the overflow valve.

[0037] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A pressure-resistant overflow valve comprising a housing (1) and an inlet pipe (2), characterized in that: The housing (1) is internally movably sleeved with a damping sleeve (3), the damping sleeve (3) is internally movably sleeved with a movable piston (4), the side of the movable piston (4) is provided with a flow guide hole (5), the side of the housing (1) is fixedly sleeved with a connecting pipe (6), the side of the movable piston (4) is fixedly connected with a positioning column (7), one end of the positioning column (7) is fixedly sleeved with a closing plug (8), the damping sleeve (3) is internally movably sleeved with a spring (9), the side of the housing (1) is threadedly sleeved with a threaded column (10), the closing plug (8) is fixedly sleeved with a spring (9), the side of the housing (1) is threadedly sleeved with a threaded column (10), the closing plug (8) is fixedly sleeved with a spring (9), the damping sleeve (3) is internally movably ... spring (9), the side of the housing (1) is threadedly sleeved with a threaded column (10), the closing plug (8) is fixedly sleeved with a spring (9), the damping sleeve (3) is internally movably sleeved with a spring (9), the side of the housing (1) is threadedly sleeved with a threaded column (10), the closing plug (8) is fixedly sleeved with a spring (9), the damping sleeve (3) is internally movably sleeved with a damping sleeve (3), the side of the housing (1) is threadedly sleeved with a threaded column (10), the closing plug (8) is fixedly sleeved with a spring (9), the damping sleeve (3) is internally movably sleeved with a damping sleeve ( The outer portion of the obstruction (8) is fixedly sleeved with a sealing sleeve (11), the outer portion of the connecting pipe (6) is movably sleeved with a mounting sleeve (12), the bottom portion of the housing (1) is fixedly sleeved with a discharge pipe (13), the outer portion of the connecting pipe (6) is fixedly sleeved with a clamping ring (14), one end of the connecting pipe (6) is fixedly sleeved with a sealing ring (15), an anti-slip groove (16) is provided on the outer portion of the mounting sleeve (12), one end of the input pipe (2) is fixedly sleeved with a filter screen (17), and the interior of the housing (1) is fixedly sleeved with a partition (18).

2. A pressure-resistant relief valve according to claim 1, characterized in that: The closing plug (8) is movably sleeved on the side of the connecting pipe (6), and the front shape of the closing plug (8) is conical.

3. A pressure-resistant relief valve according to claim 1, characterized in that: One end of the threaded column (10) is movably sleeved on the side of the damping sleeve (3), and the threaded column (10) is located in the middle of the side of the damping sleeve (3).

4. A pressure-resistant relief valve according to claim 1, characterized in that: The sealing sleeve (11) is adapted to the connecting pipe (6), and the sealing sleeve (11) is made of rubber material.

5. A pressure-resistant relief valve according to claim 1, characterized in that: The mounting sleeve (12) is threadedly sleeved on the outside of the input pipe (2), and the mounting sleeve (12) is movably sleeved on the outside of the clamping ring (14).

6. A pressure-resistant relief valve according to claim 1, characterized in that: The sealing ring (15) is tightly pressed against the side of the input pipe (2), and the sealing ring (15) is made of rubber material.

7. A high pressure-resistant relief valve according to claim 1, characterized in that: The number of the anti-slip grooves (16) is several, and the several anti-slip grooves (16) are evenly distributed outside the mounting sleeve (12).

8. The pressure-resistant relief valve according to claim 1, characterized in that: The diameter of the filter screen (17) is the same as the diameter of the connecting pipe (6), and the material of the filter screen (17) is stainless steel.

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