CN113280161A

CN113280161A - Check valve and lubricating pump

Info

Publication number: CN113280161A
Application number: CN202110720666.4A
Authority: CN
Inventors: 高生; 高志俭; 金秀宇
Original assignee: Sany Heavy Equipment Co Ltd
Current assignee: Sany Heavy Equipment Co Ltd
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2021-08-20

Abstract

The invention discloses a check valve and a lubricating pump, wherein the check valve comprises a valve body and a valve core, the valve body is provided with a liquid inlet, a liquid outlet and a valve cavity communicated with the liquid inlet and the liquid outlet, and the valve cavity comprises a guide section and a sealing section; the valve core is arranged in the valve cavity and comprises a guide part and a sealing part, wherein the guide part is matched with the guide section to limit the valve core to move radially, and the sealing part is matched with the sealing section to separate the liquid inlet and the liquid outlet. The check valve provided by the invention limits the radial movement of the valve core through the matching of the guide part and the guide section so as to limit the axial movement of the sealing part, and realizes that the sealing part can separate the liquid inlet and the liquid outlet under the guide action, so that the problems of liquid leakage and pressure leakage of the check valve in the related art under the guide-free action of the sealing part are solved.

Description

Check valve and lubricating pump

Technical Field

The invention belongs to the technical field of hydraulic elements, and particularly relates to a one-way valve and a lubricating pump.

Background

At present, the one-way valve is widely applied in various industries, and the structure types and specification types of the one-way valve are many, wherein the one-way valve assembled in a lubricating system is matched with a sealing part through a spring, and the sealing part is driven to block a liquid inlet by the expansion of the spring, so that the one-way control of the one-way valve on liquid is completed.

Because, the sealing of current check valve carries out the shutoff to the inlet under the non-guide effect, and after the spring was compressed, the sealing took place the drunkenness easily, can't reach the sealed effect to the inlet, consequently, the phenomenon of check valve oil leak often can appear, and then has leaded to the problem of lubricating pump zero pressure among the lubricating system, not only causes the waste of lubricating oil, influences lubricating system's work efficiency, and the lubricating oil of revealing in addition also can cause the pollution to the environment.

Disclosure of Invention

Aiming at the defects of the related art, the invention provides a one-way valve and a lubricating pump, wherein the one-way valve can solve the problems of liquid leakage and pressure leakage of the one-way valve in the related art under the guiding-free action of a sealing part.

A first aspect of the invention provides a one-way valve comprising:

the valve body is provided with a liquid inlet, a liquid outlet and a valve cavity communicated with the liquid inlet and the liquid outlet, and the valve cavity comprises a guide section and a sealing section;

the valve core is arranged in the valve cavity and comprises a guide part and a sealing part, wherein the guide part is matched with the guide section to limit the valve core to move in the radial direction, and the sealing part is matched with the sealing section to separate the liquid inlet and the liquid outlet.

Furthermore, the sealing section is located the guide section is located the one side of keeping away from the inlet, the guide part with guide section clearance fit.

Further, the direction section, the seal section with the inlet all sets up coaxially, the sealing with the direction portion is connected.

Furthermore, the sealing section comprises a conical opening, the small-opening end of the conical opening is arranged close to the liquid inlet, and the large-opening end of the conical opening is arranged close to the liquid outlet; the sealing part comprises a conical block matched with the conical opening and a sealing ring which is sleeved on the conical block and is coaxially arranged with the conical block.

Furthermore, the valve body is also provided with at least two through holes communicated with the liquid inlet and the sealing part, and the at least two through holes are distributed on the peripheral side of the guide section; and all the through holes are also separated from the liquid outlet when the sealing part is matched with the sealing section to separate the liquid inlet and the liquid outlet.

Furthermore, a diversion trench communicated with the liquid inlet is formed in the inner wall of the guide section.

Further, the method also comprises the following steps:

and the spring is positioned in the valve cavity, the first end of the spring is connected with the valve core, and the second end of the spring is connected with the cavity wall of one side of the valve cavity, which is close to the liquid outlet.

Furthermore, the spring is sleeved outside the valve core and abutted against the sealing part, and the compressible length of the spring in the valve cavity is smaller than that of the guide section.

Furthermore, a fixed seat is arranged on one side, close to the liquid outlet, in the valve cavity, a liquid outlet channel communicated with the liquid outlet is formed in the fixed seat, and the second end of the spring is sleeved on the fixed seat.

According to the check valve provided by the invention, the radial movement of the valve core is limited through the matching of the guide part and the guide section, so that the axial movement of the sealing part is limited, the liquid inlet and the liquid outlet are separated by the sealing part under the guide effect, and the problems of liquid leakage and pressure leakage of the check valve in the related art under the guide-free effect of the sealing part are solved.

In another aspect the invention provides a lubrication pump comprising a one-way valve as described above.

According to the invention, the one-way valve is arranged on the lubricating pump, so that the problem of no pressure of the lubricating pump can be reduced, and the working efficiency of the one-way valve is further improved.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of a check valve in the related art;

FIG. 2 is a schematic view showing a structure of another check valve in the related art;

FIG. 3 is a schematic view of a check valve in accordance with an exemplary embodiment of the present invention;

FIG. 4 is a schematic structural view of another check valve in accordance with an exemplary embodiment of the present invention;

FIG. 5 is a bottom view of a one-way valve according to an exemplary embodiment of the present invention;

FIG. 6 is a schematic view of a guide segment and through hole connection in accordance with an exemplary embodiment of the present invention;

FIG. 7 is a schematic view of the connection of the piston rod and the seal of an exemplary embodiment of the present invention;

fig. 8 is a schematic view of the connection of another piston rod and seal according to an exemplary embodiment of the present invention.

In the figure:

1 a-valve body, 2 a-spring, 3 a-sealing part, 4 a-piston rod;

1-a valve body, 101-a liquid inlet, 102-a liquid outlet, 103-a valve cavity, 1031-a guide section, 1032-a sealing section and 10311-a diversion trench;

2-valve core, 201-guide part, 202-sealing part, 2021-conical block, 2022-sealing ring, 2023-annular groove;

3-a spring;

4-fixing seat.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

The check valve in the related art, referring to fig. 1 and 2, includes a valve body 1a, a spring 2a, a sealing portion 3a and a piston rod 4a, wherein the valve body 1a has a liquid inlet, a liquid outlet and a valve cavity communicating the liquid inlet and the liquid outlet; the sealing part 3a and the piston rod 4a are both positioned in the valve cavity, the sealing part 3a is arranged close to the liquid inlet, one end of the piston rod 4a is connected with the sealing part 3a, the spring 2a is sleeved on the piston rod 4a, one end of the spring 2a is connected with the piston rod 4a, and the other end of the spring 2a is connected with the inner wall of the valve cavity close to the liquid outlet; wherein, the sealing part 3a is a ball valve or a conical wedge.

Because, the check valve among the relevant art causes the sealing part easily when carrying out the shutoff to the inlet after the repeated compression, and the sealing part takes place the drunkenness easily, can't be sealed completely to the inlet. Therefore, in order to solve the problems of liquid leakage and pressure leakage of the check valve in the related art under the condition that the sealing part has no guiding function, the invention provides the check valve.

The check valve provided by the invention, referring to fig. 3 and 4, comprises a valve body 1 and a valve core 2, wherein the valve body 1 is provided with a liquid inlet 101, a liquid outlet 102 and a valve cavity 103 for communicating the liquid inlet 101 with the liquid outlet 102, and the valve cavity 103 comprises a guide section 1031 and a sealing section 1032; the valve core 2 is arranged in the valve cavity 103, and the valve core 2 comprises a guide part 201 which is matched with the guide section 1031 to limit the radial movement of the valve core 2, and a sealing part 202 which is matched with the sealing section 1032 to separate the liquid inlet 101 and the liquid outlet 102.

Under the hydraulic action of the liquid in the pipeline of the lubricating pump, when the sealing part 202 separates the sealing section 1032 to remove the separation between the liquid inlet 101 and the liquid outlet 102, the liquid can enter the valve cavity 103 through the liquid inlet 101, at the moment, when the sealing part 202 moves towards the direction of separating the sealing section 1032, the valve core 2 is limited by the matching of the guide part 201 and the guide section 1031 to move in the radial direction, so that the sealing part 202 moves in the axial direction of the valve core 2 under the driving of the valve core 2; when the flow of the liquid in the lubrication pump line is stopped, when the seal portion 202 moves in the sealing direction of the seal section 1032, the guide portion 201 and the guide section 1031 cooperate with each other to restrict the radial movement of the valve body 2, and therefore, the seal portion 202 also moves along the axial direction of the valve body 2 along with the valve body 2, and the seal portion 202 is restricted from sealing the seal section 1032 in the axial direction of the valve body 2.

According to the check valve provided by the invention, the radial movement of the valve core 2 is limited through the matching of the guide part 201 and the guide section 1031, so that the axial movement of the sealing part 202 is limited, and further the separation of the liquid inlet 101 and the liquid outlet 102 by the sealing part 202 under the guide action is realized, so that the problems of liquid leakage and pressure leakage of the check valve in the related art under the non-guide action of the sealing part 202 are solved.

In some embodiments, the sealing section 1032 is located at a side of the guiding section 1031 located away from the liquid inlet 101, and the guiding portion 201 is clearance-fitted with the guiding section 1031. In this embodiment, the sealing section 1032 is located on the side of the guide section 1031 far away from the liquid inlet 101, so that the guide section 1031 can be conveniently machined at the end of the valve body 1, meanwhile, the outer side part of the guide part 201 is in clearance fit with the guide section 1031, the guide part 201 can be ensured to move in the axial direction of the guide section 1031, and then the sealing part 202 is ensured to move in the axial direction of the guide section 1031 under the matching of the guide part 201 and the guide section 1031, so that the axial movement of the sealing part 202 is limited, and the sealing part 202 is enabled to separate the liquid inlet 101 from the liquid outlet 102 under the guiding action.

Further, the guide section 1031, the sealing section 1032 and the liquid inlet 101 are all coaxially arranged, and the sealing part 202 is connected with the guide part 201. In the present embodiment, by disposing the guide section 1031, the sealing section 1032 and the liquid inlet 101 coaxially, when the guide portion 201 moves in the axial direction of the guide section 1031, the valve element 2 is moved along the axial direction of the guide section 1031 along with the guide portion 201, so as to restrict the sealing section 202 from blocking the sealing section 1032 in the axial direction of the sealing section 1032. Preferably, the length of the guide section 1031 is greater than the maximum displacement length of the valve element 2 moving from the liquid inlet 101 to the liquid outlet 102, and by making the length of the guide section 1031 greater than the maximum displacement length of the valve element 2 moving from the liquid inlet 101 to the liquid outlet 102, the guide portion 201 can be always movably connected with the guide section 1031 in the process of moving the valve element 2 from the liquid inlet 101 to the liquid outlet 102, so as to ensure that the guide section 1031 and the guide portion 201 are matched to limit the radial movement of the valve element 2 in the moving process of the valve element 2 in the valve cavity 103.

Specifically, referring to fig. 3, the cross-sectional area of the guide section 1031 is smaller than the cross-sectional area of the valve cavity 103, and the area of the liquid inlet 101 is between the cross-sectional area of the guide section 1031 and the cross-sectional area of the valve cavity 103, so that when the cross-sectional area of the sealing portion 202 is larger than the cross-sectional area of the guide section 1031, the sealing portion 202 can seal the liquid inlet 101.

Further, referring to fig. 4 and 8, the sealing section 1032 includes a tapered mouth, a small mouth end of the tapered mouth being disposed adjacent to the liquid inlet 101, and a large mouth end of the tapered mouth being disposed adjacent to the liquid outlet 102; the sealing portion 202 includes a tapered block 2021 fitting to the tapered opening, and a sealing ring 2022 fitted over the tapered block 2021 and disposed coaxially with the tapered block 2021. In the present embodiment, when the sealing section 1032 is a tapered opening and moves in the axial direction of the guiding section 1031 under the cooperation of the guiding portion 201 and the guiding section 1031, the tapered block 2021 connected to the guiding portion 201 moves in the axial direction of the tapered opening, and when the sealing ring 2022 provided on the tapered block 2021 moves to be separated from the tapered opening by the liquid flow in the pipe line of the lubrication pump, the liquid can flow into the valve cavity 103 from the guiding section 1031 through the liquid inlet 101 and the gap between the tapered block 2021 and the tapered opening in sequence; when the sealing ring 2022 on the conical block 2021 moves to close the conical opening, the liquid in the guide section 1031 cannot enter the valve chamber 103. Preferably, the side portion of the tapered block 2021 is provided with an annular groove 2023 coaxially disposed with the tapered block 2021, and the sealing ring 2022 is sleeved on the tapered block 2021 and then can be inserted into the annular groove 2023.

In some embodiments, the valve body 1 is further provided with at least two through holes communicating with the liquid inlet 101 and the sealing portion 202, and the at least two through holes are distributed on the peripheral side of the guide section 1031; all of the through holes are also isolated from the outlet port 102 when the sealing portion 202 and the sealing section 1032 cooperate to isolate the inlet port 101 and the outlet port 102. When the sealing portion 202 seals the sealing section 1032, at least two through holes are formed on the periphery of the guide section 1031, so that part of liquid can stay in the through holes, and when liquid in a pipeline of the lubricating pump flows, the liquid in the through holes can push the sealing portion 202 to move, so that the liquid pushing force on the sealing portion 202 is increased.

Specifically, referring to fig. 5 and 6, a guide groove 10311 communicated with the liquid inlet 101 is formed in an inner wall of the guide section 1031, the guide portion 201 is in clearance fit with the guide section 1031, the guide groove 10311 is arranged to enable the guide portion 201 located in the guide section 1031 to keep continuous contact with liquid, and particularly when the check valve is used for a lubrication pump, the guide portion 201 can keep continuous contact with lubricating oil to ensure that the guide portion 201 slides in the guide section 1031 under the continuous lubrication of the lubricating oil.

In some embodiments, the check valve further comprises a spring 3, the spring 3 is located in the valve cavity 103, a first end of the spring 3 is connected with the valve core 2, and a second end of the spring 3 is connected with a cavity wall on one side of the valve cavity 103 close to the liquid outlet 102. In this embodiment, the two ends of the spring 3 are respectively connected to the guide portion 201 and a chamber wall of the valve chamber 103 near the liquid outlet 102, so that the guide portion 201 moves along the axial direction of the guide section 1031 under the driving of the extension and contraction of the spring 3.

Further, referring to fig. 7 and 8, the spring 3 is sleeved outside the valve core 2 and abuts against the sealing part 202, and the compressible length of the spring 3 in the valve cavity 103 is smaller than the length of the guide section 1031. In the embodiment, the spring 3 is sleeved outside the valve element 2 and is abutted against the guide part 201, so that the spring 3 is driven by the hydraulic pressure of the sealing part 202 to extend and retract along the length direction of the valve element 2, the extending and retracting direction of the spring 3 is ensured to be consistent with the axial direction of the guide section 1031, and the guide part 201 moves along the axial direction of the guide section 1031 downwards in the extending and retracting belt of the spring 3; meanwhile, the maximum compression length of the spring 3 in the valve cavity 103 is smaller than the length of the guide section 1031, so that the compressible length of the valve core 2 in the spring 3 is smaller than the length of the flow guide section, and the guide part 201 is movably connected with the guide section 1031 in the process that the valve core 2 moves from the liquid inlet 101 to the liquid outlet 102, so that the guide section 1031 and the guide part 201 are kept matched to limit the radial movement of the valve core 2 in the moving process of the valve core 2 in the valve cavity 103.

Furthermore, a fixed seat 4 is disposed on one side of the valve cavity 103 close to the liquid outlet 102, a liquid outlet passage communicated with the liquid outlet 102 is disposed on the fixed seat 4, and the second end of the spring 3 is sleeved on the fixed seat 4 and connected with the fixed seat 4. In this embodiment, after the liquid enters the valve cavity 103 from the liquid inlet 101, the liquid flows to the liquid outlet 102 through the liquid outlet channel on the fixing base 4, so as to realize the flow of the liquid through the liquid inlet 101, the liquid outlet channel and the liquid outlet 102 in sequence. Preferably, the liquid outlet channel and the liquid outlet 102 are coaxially arranged, and the liquid outlet channel is also coaxially arranged with the liquid inlet 101.

The invention provides a lubricating pump which comprises the one-way valve.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A check valve, comprising:

the valve comprises a valve body (1) and a valve body, wherein the valve body is provided with a liquid inlet (101), a liquid outlet (102) and a valve cavity (103) communicated with the liquid inlet (101) and the liquid outlet (102), and the valve cavity (103) comprises a guide section (1031) and a sealing section (1032);

the valve core (2) is arranged in the valve cavity (103), and the valve core (2) comprises a guide part (201) which is matched with the guide section (1031) to limit the radial movement of the valve core (2) and a sealing part (202) which is matched with the sealing section (1032) to separate the liquid inlet (101) and the liquid outlet (102).

2. The one-way valve according to claim 1, wherein the sealing section (1032) is located at a side of the guiding section (1031) located away from the liquid inlet (101), the guiding portion (201) being clearance fitted with the guiding section (1031).

3. The one-way valve according to claim 2, wherein the guiding section (1031), the sealing section (1032) and the liquid inlet (101) are all coaxially arranged, the sealing portion (202) being connected with the guiding portion (201).

4. The one-way valve of claim 2, wherein the sealing section (1032) comprises a tapered mouth, a small mouth end of the tapered mouth being disposed proximate to the liquid inlet (101) and a large mouth end of the tapered mouth being disposed proximate to the liquid outlet (102); the sealing part (202) comprises a conical block (2021) matched with the conical opening and a sealing ring (2022) sleeved on the conical block (2021) and coaxially arranged with the conical block (2021).

5. The one-way valve according to claim 3 or 4, wherein the valve body (1) is further provided with at least two through holes communicated with the liquid inlet (101) and the sealing part (202), and the at least two through holes are distributed on the peripheral side of the guide section (1031); when the sealing part (202) and the sealing section (1032) are matched to block the liquid inlet (101) and the liquid outlet (102), all the through holes are also blocked with the liquid outlet (102).

6. The one-way valve according to claim 3 or 4, wherein a diversion trench (10311) communicated with the liquid inlet (101) is formed in the inner wall of the guide section (1031).

7. The one-way valve of claim 1, further comprising:

the spring (3) is positioned in the valve cavity (103), the first end of the spring (3) is connected with the valve core (2), and the second end of the spring is connected with the cavity wall of one side, close to the liquid outlet (102), of the valve cavity (103).

8. The non-return valve according to claim 7, characterized in that the spring (3) is sleeved outside the valve core (2) and abuts against the sealing part (202), and the compressible length of the spring (3) in the valve cavity (103) is smaller than the length of the guide section (1031).

9. The check valve according to claim 7, wherein a fixed seat (4) is disposed at a side of the valve cavity (103) close to the liquid outlet (102), the fixed seat (4) is provided with a liquid outlet passage communicated with the liquid outlet (102), and the second end of the spring (3) is sleeved on the fixed seat (4).

10. A lubrication pump, characterized in that it comprises a one-way valve according to any of claims 1 to 9.