CN219866333U

CN219866333U - Automatic exhaust valve and lubricating pump with same

Info

Publication number: CN219866333U
Application number: CN202320745625.5U
Authority: CN
Inventors: 张芷瑜; 张芷毓
Original assignee: Shanghai Limoto Machinery Co ltd
Current assignee: Shanghai Limoto Machinery Co ltd
Priority date: 2023-04-06
Filing date: 2023-04-06
Publication date: 2023-10-20
Anticipated expiration: 2033-04-06

Abstract

The utility model provides an automatic exhaust valve, including valve body, case and reset spring, the inside cavity that forms of valve body is in being formed with air inlet and gas outlet, the case is built-in the valve body and along the cavity inner wall reciprocating sliding between air inlet and gas outlet and be equipped with sealing portion, still be formed with the clearance between case periphery wall and the inner wall of valve body cavity, through setting up the clearance that the size is suitable between valve body cavity and case periphery wall, and set up the reset spring that has suitable elasticity, and utilize the difference of the air and lubricating oil (or grease) through the produced resistance along journey of same shut-off passageway, the size difference of pressure drop that forms, the actuating force that the pressure difference that produces when making the air pass acts on the case is less than reset spring's elasticity, thereby make case and gas outlet keep open state and guarantee that the air flue is unblocked reaches the exhaust effect. When the lubricating oil (or grease) passes through, the driving force of the pressure difference generated by the lubricating oil (or grease) acting on the valve core is larger than the elastic force of the reset spring, so that the valve core is forced to move to close the air outlet, thereby ensuring the closing of the oil duct and achieving the effect of exhausting the air without discharging the oil (or grease).

Description

Automatic exhaust valve and lubricating pump with same

Technical Field

The utility model relates to an exhaust valve, in particular to an automatic exhaust valve and a lubricating pump with the same.

Background

The lubricant in the oil pump is mixed with air, so that the phenomenon that the lubricant cannot be discharged out of the pump due to the fact that air bubbles are generated in the oil pumping process, and the air is discharged at the moment, and an exhaust valve is generally arranged. At present, a screw plug is arranged on an exhaust port of a common grease pump exhaust valve, the screw plug is unscrewed to exhaust when the pump is in contact with the empty phenomenon of the pump, and the screw plug is screwed when a large amount of oil gas overflows, so that the use is influenced by time and effort.

In view of this, chinese patent application No. 201710842705.1 (application publication No. CN 109519686 a) discloses an exhaust valve for a grease pump, which includes a grease pump body, a stepped hole communicating with a grease cavity is formed in the grease pump body, an exhaust valve body is disposed on the stepped hole near the hole opening and is connected to the grease pump body through a screw pair, a stepped through hole is disposed at the central shaft of the exhaust valve body, an exhaust valve core is disposed in the stepped through hole, and a return spring is disposed between the top of the exhaust valve core and the bottom of the stepped hole. When the exhaust valve is used, the exhaust valve core is manually pressed to overcome the reset spring, so that the exhaust valve can play a role in exhausting, and when the exhaust is finished, the pressure difference generated by the flow of grease and the elastic force of the reset spring promote the exhaust valve core to reset so as to seal the channel. However, there is a problem: when the exhaust valve is used for exhausting, the exhaust valve core is required to be manually controlled to realize the exhaust, and when the grease pump is immersed in the sealed oil tank, the exhaust valve core is inconvenient to manually press or can not be operated.

Therefore, how to provide a lubrication pump exhaust valve with a simple structure and capable of automatically exhausting is a problem to be solved by those skilled in the art.

Disclosure of Invention

The first technical problem to be solved by the utility model is to provide an automatic exhaust valve which has a simple structure, is easy to install and can automatically exhaust.

The second technical problem to be solved by the present utility model is to provide a lubrication pump using the automatic exhaust valve in the above prior art.

The utility model solves the first technical problem by adopting the technical scheme that: an automatic exhaust valve comprises a valve body, wherein a cavity is formed in the valve body, an air inlet is formed at one end of the valve body, and an air outlet is formed at the other end of the valve body;

the valve core is arranged in the valve body, can slide back and forth between the air inlet and the air outlet along the inner wall of the chamber, is provided with a sealing part which can seal the air outlet when the valve core slides to the air outlet, and a gap is formed between the outer peripheral wall of the valve core and the inner wall of the chamber of the valve body;

and the return spring is arranged in the valve body and can reset the valve core plugged in the air outlet.

In order to facilitate the assembly and production of the valve core and the valve body and also to better limit the valve core to move within a certain range, preferably, a pressing sleeve capable of limiting excessive sliding of the valve core is additionally arranged at the end part of the valve body, the pressing sleeve is provided with a through hole in a penetrating manner, and the through hole is communicated with the cavity to form the air inlet.

In order to enable the valve core to better seal the air outlet, preferably, the sealing part is a first conical surface arranged at the end part of the valve core, a second conical surface which can be adapted to the first conical surface is formed at the joint of the cavity and the air outlet, and when the valve core slides to the air outlet, the first conical surface abuts against the second conical surface and seals the air outlet.

In order to optimize the matching structure between the valve core and the valve body, preferably, the taper of the first conical surface is smaller than that of the second conical surface.

In order to facilitate the installation and use of the return spring, preferably, the outer peripheral wall of the valve core comprises a first outer peripheral wall and a second outer peripheral wall, the diameter of the second outer peripheral wall is larger than that of the first outer peripheral wall, the return spring is sleeved on the first outer peripheral wall, one end of the return spring abuts against a step surface formed by the first outer peripheral wall and the second outer peripheral wall, the other end of the return spring abuts against the second conical surface, and the first conical surface is arranged at the end part of the first outer peripheral wall.

In order to allow two different pressure differences between the air and the grease to be formed when passing through the gap, it is preferable that the gap is an annular gap formed between the second peripheral wall and the inner wall of the valve body chamber, and the size of the gap is 0.06mm.

In order to facilitate the quick and convenient installation of the automatic exhaust valve on the lubricating pump, preferably, the valve body shell is provided with external threads for connecting the lubricating pump and a nut for clamping and rotating by a spanner, and the air outlet is positioned at the end part of the valve body, provided with the nut.

The utility model solves the second technical problem by adopting the technical proposal that: the utility model provides a lubricating pump, includes the pump body, the pump body embeds the oil storage tank, the oil storage tank top is equipped with and is used for the drive the motor of pump body, be equipped with an oil feed passageway on the pump body at least, install automatic discharge valve on the pump body.

In order to enable the automatic exhaust valve to be matched with the lubricating pump better for automatic exhaust, preferably, the automatic exhaust valve is arranged in the oil storage tank, and an exhaust channel formed by the automatic exhaust valve and an oil inlet channel of the pump body are arranged in parallel.

Compared with the prior art, the utility model has the advantages that: the valve body cavity and the peripheral wall of the valve core are provided with a proper gap, a return spring with proper elasticity is arranged, and the difference of the pressure drop is utilized by utilizing the difference of the on-way resistance generated by the air and the lubricating oil (or grease) passing through the same intercepting channel, so that the driving force of the pressure difference generated by the air passing through acting on the valve core is smaller than the elasticity of the return spring, and the valve core and the air outlet are kept in an open state, thereby ensuring that the air passage is unblocked and the exhaust effect is achieved. When the lubricating oil (or grease) passes through, the driving force of the pressure difference generated by the lubricating oil (or grease) acting on the valve core is larger than the elastic force of the reset spring, so that the valve core is forced to move to close the air outlet, thereby ensuring the closing of the oil duct and achieving the effect of exhausting the air without discharging the oil (or grease). Compared with other exhaust valves, the exhaust valve has the characteristics of simple structure, low cost, small volume and strong practicability.

Drawings

FIG. 1 is a perspective view of an embodiment of the present utility model;

FIG. 2 is a schematic perspective view of another angle of the embodiment of the present utility model;

FIG. 3 is a schematic view showing an exploded structure of an embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of an embodiment of the present utility model (with the air outlet closed);

FIG. 5 is a schematic cross-sectional view of an embodiment of the present utility model (the air outlet is in an open and closed state, and the arrow shows a schematic view of the direction of exhaust);

FIG. 6 is an overall cross-sectional schematic of a lubrication pump in an embodiment of the utility model;

FIG. 7 is an enlarged view of portion A of FIG. 6;

fig. 8 is a partially exploded view of a lubrication pump according to an embodiment of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

Fig. 1 to 8 are schematic views of the present embodiment, and an automatic exhaust valve of the present embodiment includes a valve body 1, a valve element 2, a return spring 3, a pressing sleeve 7, and the like.

As shown in fig. 3 to 5, a chamber 1a is formed inside the valve body 1, an air inlet 1b is formed at one end, an air outlet 1c is formed at the other end, a valve core 2 is arranged inside the valve body 1, and can slide back and forth between the air inlet 1b and the air outlet 1c along the inner wall of the chamber 1a, a sealing part capable of sealing the air outlet 1c when the valve core 2 slides to the air outlet 1c is arranged, a gap 1d is formed between the outer peripheral wall of the valve core 2 and the inner wall of the chamber 1a of the valve body 1, and a return spring 3 is arranged in the valve body 1 and can reset the valve core 2 sealed at the air outlet 1c.

As shown in fig. 3 to 5, in this embodiment, for convenience of assembly and production, and also for better limiting the movement of the valve core 2 only within a certain range, a pressing sleeve 7 capable of limiting excessive sliding of the valve core 2 is specially added at the end of the valve body 1, the pressing sleeve 7 is provided with a through hole in a penetrating manner, and the through hole is communicated with the cavity 1a to form an air inlet 1b.

Referring to fig. 4, in this embodiment, in order to enable the valve core 2 to better plug the air outlet 1c, a first conical surface 2a is specially provided at the end of the valve core 2 to form a sealing portion, a second conical surface 1e capable of adapting to the first conical surface 2a is specially formed at the connection position of the chamber 1a and the air outlet 1c, the taper of the first conical surface 2a is specially made smaller than that of the second conical surface 1e, and when the valve core 2 slides to the air outlet 1c, the first conical surface 2a abuts against the second conical surface 1e and just plugs the air outlet 1c.

Referring to fig. 3, in this embodiment, in order to facilitate installation and use of the return spring 3, the outer peripheral wall of the valve core 2 includes a first outer peripheral wall 2b and a second outer peripheral wall 2c, the diameter of the second outer peripheral wall 2c is larger than that of the first outer peripheral wall 2b, the return spring 3 is sleeved on the first outer peripheral wall 2b, one end of the return spring abuts against a step surface formed by the first outer peripheral wall 2b and the second outer peripheral wall 2c, the other end of the return spring abuts against a second conical surface 1e, and the first conical surface 2a is disposed at the end of the first outer peripheral wall 2 b.

Referring to fig. 4, in the present embodiment, in order to make it possible to better form two different pressure differences when air and lubricating oil (or grease) pass through the gap 1d, the gap 1d is purposely designed in a ring shape, the ring-shaped gap 1d is specifically a gap formed between the second peripheral wall 2c and the inner wall of the chamber 1a of the valve body 1, and the size of the gap 1d is preferably 0.06mm.

Referring to fig. 1 to 2, in the present embodiment, an external thread 11 for connecting a lubrication pump and a nut 12 for clamping and rotating by a wrench are formed on the outer shell of the valve body 1, and the air outlet 1c is located at the end of the valve body 1 where the nut 12 is provided, so that the automatic air outlet valve can be quickly installed on the lubrication pump based on the arrangement of the external thread 11 and the nut 12.

In addition, in this embodiment, as shown in fig. 6 to 8, the lubrication pump mainly includes a pump body 4, the pump body 4 is built in an oil storage tank 5, a motor 6 for driving the pump body 4 is arranged above the oil storage tank 5, at least one oil inlet channel 4a is arranged on the pump body 4, an automatic exhaust valve in this embodiment is arranged on the pump body 4, the automatic exhaust valve is built in the oil storage tank 5, and an exhaust channel formed by the automatic exhaust valve and the oil inlet channel 4a of the pump body 4 are arranged in parallel.

The working principle and the using process of the automatic exhaust valve are as follows: when the lubricating pump is influenced by gas, and external exhaust is needed, the difference of pressure drop is formed by utilizing the characteristic that large difference exists in trafficability, friction force, resistance and the like when air and lubricating oil (or grease) respectively pass through a gap 1d and utilizing the difference of on-way resistance generated when the air and the lubricating oil (or grease) pass through the same intercepting channel, so that the driving force of the pressure difference generated when the air passes through on the valve core is smaller than the elastic force of a reset spring. When the air passes through the gap 1d and is insufficient to overcome the return spring 3, the valve core 2 cannot be moved to block the air outlet 1c, and specifically referring to fig. 6, the air can be automatically exhausted. When the air is exhausted, the lubricating oil (or grease) passes through the gap 1d, and the pressure difference generated by the lubricating oil (or grease) on the valve core 2 is enough to overcome the elastic force of the return spring 3, so that the lubricating oil (or grease) can push the valve core 2 to slide and block the air outlet 1c, and the purpose of exhausting air and not discharging oil is finally achieved as shown in fig. 5. When the valve is in a pump stopping state, the valve core 2 pushes away for resetting under the action of the reset spring 3, and the air outlet 1c is opened to prepare for the next automatic exhaust.

Claims

1. An automatic exhaust valve, characterized in that: comprises a valve body (1), a valve core (2) and a return spring (3),

the valve comprises a valve body (1), wherein a cavity (1 a) is formed in the valve body (1), a pressing sleeve (7) capable of limiting excessive sliding of the valve core (2) is additionally arranged at one end of the valve body (1), a through hole is formed in the pressing sleeve (7) in a penetrating mode, the through hole is communicated with the cavity (1 a) to form an air inlet (1 b), and an air outlet (1 c) is formed at the other end of the valve body;

the valve body (2) is arranged in the valve body (1), can slide back and forth between the air inlet (1 b) and the air outlet (1 c) along the inner wall of the cavity (1 a), and is provided with a sealing part which can enable the valve body (2) to slide to the air outlet (1 c) and seal the air outlet (1 c), the sealing part is a first conical surface (2 a) arranged at the end part of the valve body (2), a second conical surface (1 e) which can be matched with the first conical surface (2 a) is formed at the joint of the cavity (1 a) and the air outlet (1 c), and when the valve body (2) slides to the air outlet (1 c), the first conical surface (2 a) abuts against the second conical surface (1 e) and seals the air outlet (1 c), and a gap (1 d) is formed between the outer peripheral wall of the valve body (2) and the inner wall of the cavity (1 a) of the valve body (1).

And a return spring (3) which is arranged in the valve body (1) and can return the valve core (2) plugged in the air outlet (1 c).

2. The automatic exhaust valve according to claim 1, characterized in that: the taper of the first conical surface (2 a) is smaller than that of the second conical surface (1 e).

3. The automatic exhaust valve according to claim 1, characterized in that: the valve core (2) peripheral wall include first peripheral wall (2 b) and second peripheral wall (2 c), second peripheral wall (2 c) diameter is greater than the diameter of first peripheral wall (2 b), reset spring (3) cover is located first peripheral wall (2 b) and one end support on the step face that first peripheral wall (2 b) and second peripheral wall (2 c) formed, the other end then supports second conical surface (1 e), first conical surface (2 a) are located the tip department of first peripheral wall (2 b).

4. An automatic exhaust valve according to claim 3, characterized in that: the gap (1 d) is an annular gap formed between the second peripheral wall (2 c) and the inner wall of the chamber (1 a) of the valve body (1), and the width of the gap (1 d) is 0.06mm.

5. The automatic exhaust valve according to any one of claims 1 to 4, characterized in that: the valve body (1) is characterized in that an external thread (11) for connecting a lubricating pump and a nut (12) for clamping and rotating by a spanner are formed on the shell of the valve body (1), and the air outlet (1 c) is positioned at the end part of the valve body (1) provided with the nut (12).

6. The utility model provides a lubricating pump, including pump body (4), pump body (4) embeds oil storage tank (5), oil storage tank (5) top is equipped with and is used for the drive motor (6) of pump body (4), be equipped with one at least oil feed passageway (4 a) on pump body (4), its characterized in that: the pump body (4) is provided with the automatic exhaust valve as claimed in claim 5.

7. The lubrication pump of claim 6, wherein: the automatic exhaust valve is arranged in the oil storage tank (5), and an exhaust channel formed by the automatic exhaust valve and an oil inlet channel (4 a) of the pump body (4) are arranged in parallel.