CN109027337B

CN109027337B - Check valve capable of manually adjusting stop direction

Info

Publication number: CN109027337B
Application number: CN201811060996.XA
Authority: CN
Inventors: 邱梅
Original assignee: Suzhou Danton Mechanical And Electrical Co Ltd
Current assignee: Suzhou Danton Mechanical And Electrical Co Ltd
Priority date: 2018-09-12
Filing date: 2018-09-12
Publication date: 2020-02-14
Anticipated expiration: 2038-09-12
Also published as: CN109027337A

Abstract

The invention discloses a check valve for manually adjusting a stop direction, which comprises a first shell and a second shell which are connected with each other, wherein the first shell is provided with a first through hole, the second shell is provided with a fourth connecting hole communicated with the first through hole, the check valve also comprises a first valve core matched and connected with the first through hole in a sliding way and a first spring for extruding the first valve core, the first valve core can seal the fourth connecting hole, the second shell is provided with a second through hole, the first shell is provided with a second connecting hole communicated with the second through hole, and the second connecting hole is communicated with the fourth connecting hole; the check valve further includes: the second valve core is matched and connected with the second through hole in a sliding mode, and the second spring extrudes the second valve core; a connecting rod connected with the first valve core and the second valve core; the drive rod drives the connecting rod to move, the drive rod can change the working state of the one-way valve, and the one-way valve can be controlled to prevent the liquid from flowing in the reverse direction.

Description

Check valve capable of manually adjusting stop direction

Technical Field

The invention relates to a one-way valve, in particular to a one-way valve with a manually-adjusted stop direction.

Background

The check valve is commonly called as a check valve, fluid can only flow along the water inlet, and the medium at the water outlet cannot flow back. Check valves are also known as check valves or check valves. For preventing reverse flow of oil in hydraulic systems or for preventing reverse flow of compressed air in pneumatic systems. The one-way valve has a straight-through type and a right-angle type.

Current check valve can only allow fluid to flow to a direction, realizes keeping opening when fluid flows at fixed direction, and fluid keeps ending when reverse flow, but under some circumstances, needs fluid to carry out the unidirectional flow in reverse, and fluid is by former delivery port to former water inlet unidirectional flow promptly, then at this moment, then needs reverse installation with the check valve, or uses two check valves, and the dismouting is wasted time and energy, and fluid flows out easily moreover, the polluted environment.

Disclosure of Invention

The present invention is directed to overcoming the above-mentioned drawbacks of the prior art, and providing a check valve with a manually adjustable blocking direction, which can conveniently control the direction of preventing the reverse flow of oil.

In order to achieve the purpose, the invention adopts the following technical scheme: a check valve for manually adjusting a stop direction comprises a first shell and a second shell which are connected with each other, wherein the first shell is provided with a first through hole, the second shell is provided with a fourth connecting hole communicated with the first through hole, the check valve further comprises a first valve core matched and connected with the first through hole in a sliding mode and a first spring for extruding the first valve core, the first valve core can seal the fourth connecting hole, the second shell is provided with a second through hole, the first shell is provided with a second connecting hole communicated with the second through hole, and the second connecting hole is communicated with the fourth connecting hole;

the check valve further includes:

the second valve core is matched and connected with the second through hole in a sliding mode, and the second spring presses the second valve core, and the second valve core can seal the second connecting hole;

a linkage connected to the first and second spools;

the driving rod is rotatably connected with the connecting rod and drives the connecting rod to move linearly;

the check valve at least comprises two working states, in the first working state, the first valve core is separated from the fourth connecting hole, and at the moment, the second valve core seals the second connecting hole under the action of the second spring; in a second working state, the second valve core is separated from the second connecting hole, and the first valve core seals the fourth connecting hole under the action of the first spring.

In addition, the invention also provides the following auxiliary technical scheme:

the first shell or the second shell surface is provided with a flange, and the driving rod is in threaded connection with the flange.

And one end of the driving rod is provided with a matching part matched with a wrench tool.

The driving rod comprises a shaft shoulder part, one end of the driving rod is further connected with a fixing part, and the fixing part and the shaft shoulder part are respectively located on two sides of the fourth rod part.

The one-way valve for manually adjusting the stop direction further comprises a first pull rod connected between the first valve core and the connecting rod, and the first pull rod is in sliding fit with the connecting rod.

The first pull rod is further provided with a first baffle, and the connecting rod comprises a first rod piece located between the first baffle and the first shell.

The one-way valve for manually adjusting the stop direction further comprises a second pull rod connected between the second valve core and the connecting rod, and the second pull rod is in sliding fit with the connecting rod.

The second pull rod is provided with a second baffle, and the connecting rod comprises a second rod piece located between the second baffle and the second shell.

The first shell is provided with a first through hole communicated with the first through hole and the second connecting hole; and a second through hole communicated with the second through hole and the fourth connecting hole is formed in the second shell, and the second through hole is matched with the first through hole.

The first shell is also provided with a first anti-backing sleeve, and the first spring is abutted between the first anti-backing sleeve and the first valve core; the second shell is further provided with a second anti-return sleeve, and the second spring is abutted between the second anti-return sleeve and the second valve core.

Compared with the prior art, the invention has the advantages that: the one-way valve for manually adjusting the stop direction changes the states of the first valve core and the second valve core by rotating the driving rod, so that the one-way valve can conveniently control the direction of preventing the oil from reversely flowing, and is simple and convenient to operate and high in reliability.

Drawings

Fig. 1 is a schematic view of a check valve in a shut-off state according to the present invention.

Fig. 2 is a cross-sectional view of a-a in fig. 1.

Fig. 3 is a bottom view of the check valve of fig. 1.

Fig. 4 is a left side view of the check valve of fig. 3.

Fig. 5 is a schematic view of the structure of the socket wrench mating with the driving rod.

Fig. 6 is a schematic structural view of fig. 3 with the fastener changed.

Fig. 7 is a schematic view of the check valve of the present invention in another blocking state.

Fig. 8 is a sectional view of a portion B-B in fig. 7.

Detailed Description

The present invention will be described in further non-limiting detail with reference to the following preferred embodiments and accompanying drawings.

As shown in fig. 1, a check valve for manually adjusting a blocking direction according to a preferred embodiment of the present invention includes a first housing 10 and a second housing 50 connected to each other, the first housing 10 and the second housing 50 are connected by flanges, the first housing 10 and the second housing 50 are respectively provided with a first flange 11 and a second flange 51 which are matched with each other, and the first housing 10 and the second housing 50 are fastened together by bolts and nuts (not shown).

As shown in fig. 2 to 4, a first through hole 12 is formed in an end surface of one end of the first housing 10, a first connection hole 13 and a second connection hole 14 are formed in an end surface of the other end, a first through hole 15 for connecting the first connection hole 13 and the first through hole 12 is further formed in the first housing 10, and preferably, the first connection hole 13 and the first through hole 15 are coaxially arranged; the second connection bore 14 communicates with the first through-flow bore 12 and is used for connecting an external oil line.

The second housing 50 has a structure similar to that of the first housing 10, wherein a second through hole 52 matching with the first through hole 12 is formed in an end face of one end of the second housing, a third connecting hole 53 and a fourth connecting hole 54 are formed in an end face of the other end of the second housing, a second through hole 55 communicating the third connecting hole 53 with the fourth connecting hole 54 is further formed in the second housing 50, and preferably, the third connecting hole 53 and the second through hole 55 are coaxially arranged; the fourth connection hole 54 communicates with the second through-hole 52, and is used for connecting an external oil line.

Preferably, after the first housing 10 and the second housing 50 are connected, the second connection hole 14 is coaxial with the second through hole 55; the fourth connection hole 54 is coaxial with the first through hole 15.

The check valve of the present invention further includes a first spool 16, a first anti-backup sleeve 17, a first pull rod 18, a first spring 19, a second spool 56, a second anti-backup sleeve 57, a second pull rod 58, a second spring 59, a driving rod 100, and a connecting rod 101.

Wherein the first valve core 16 is slidably fitted in the first through hole 15, and in one embodiment, the fitting relationship with the first through hole 15 can refer to the fitting relationship of the piston and the cylinder body of the oil cylinder in the prior art. One end of the first valve core 16 is provided with a first conical surface 71 capable of sealing the fourth connecting hole 54, the other end is provided with a first blind hole 70, and a first bottom surface 72 of the first blind hole 70 is further provided with a first screw hole 73 in threaded connection with the first pull rod 18. The first valve body 16 is further provided with a first through hole 75 that is in fluid communication with the first and second through

holes

12, 52 in the radial direction.

One end of the first pull rod 18 is screwed in the first screw hole 73, the other end of the first pull rod 18 extends out of the first connection hole 13 and penetrates through the first matching hole 102 of the connection rod 101, a first baffle 20 is arranged at the end of the first pull rod 18 extending out of the first matching hole 102, and the outer diameter of the first baffle 20 is larger than the diameter of the first matching hole 102.

The surface of the first connecting hole 13 is provided with threads, the first anti-backing sleeve 17 is in threaded connection with the first connecting hole 13, the first pull rod 18 is arranged in the first anti-backing sleeve 17 in a penetrating mode, and the first anti-backing sleeve 17 is provided with a first supporting surface 74.

The first spring 19 is disposed in the first blind hole 70, and is sleeved on the first pull rod 18, and two ends of the first spring respectively abut against the first supporting surface 74 and the first bottom surface 72. The first spring 19 applies a force to the first spool 16 in the direction of the fourth connection hole 54 so that the first spool 16 can abut against and seal the fourth connection hole 54.

The second valve element 56 is slidably coupled within the second bore 55, and in one embodiment, the coupling relationship with the second bore 55 is as described in the prior art with reference to the coupling relationship of the piston and the cylinder of the oil cylinder. One end of the second valve core 56 is provided with a second taper surface 81 capable of sealing the second connecting hole 14, the other end is provided with a second blind hole 80, and a second bottom surface 82 of the second blind hole 80 is further provided with a second screw hole 83 in threaded connection with the second pull rod 58. The second spool 56 is also provided with a second through-hole 85 in radial direction, which is in fluid communication with the first and second through-

holes

12, 52.

One end of the second pull rod 58 is screwed in the second screw hole 83, the other end of the second pull rod extends out of the first connection hole 13 and penetrates through the second matching hole 103 of the connection rod 101, a second baffle 60 is arranged at the end of the second pull rod 58 extending out of the second matching hole 103, and the outer diameter of the second baffle 60 is larger than the diameter of the second matching hole 103.

The surface of the third connecting hole 53 is provided with threads, the second anti-back sleeve 57 is connected in the third connecting hole 53 in a threaded manner, the second pull rod 58 penetrates through the second anti-back sleeve 57, and the second anti-back sleeve 57 is provided with a second supporting surface 84.

The second spring 59 is disposed in the second blind hole 80, and the second spring is sleeved on the second pull rod 58, and two ends of the second spring respectively abut against the second supporting surface 84 and the second bottom surface 82. The second spring 59 applies a force to the second spool 56 in the direction of the second through hole 55 so that the second spool 56 can abut against and seal the second connection hole 14.

The connecting rod 101 may be formed integrally, and in this embodiment, the connecting rod 101 is assembled in multiple stages in consideration of the processing cost. Specifically, the connecting rod 101 includes a first rod 104 disposed on the first pull rod 18, a second rod 108 disposed on the second pull rod 58, a third rod 105 disposed through the first rod 104 and connected to the first rod by a bolt, a fourth rod 106 disposed on the third rod 105 and connected to the third rod by a bolt, and a fifth rod 107 disposed through the fourth rod 106 and connected to the fourth rod by a bolt. Wherein the fifth rod 107 is further inserted into the second rod 108 and is connected with the second rod by a bolt. The first mating hole 102 and the second mating hole 103 are opened at the ends of the first rod 104 and the second rod 108, respectively. For guiding, the first flange 11 and the second flange 51 are further provided with a through guiding hole 110, and the fifth rod 107 is slidably fitted in the guiding hole 110.

The third rod member 105, the fourth rod member 106 and the fifth rod member 107 are connected in a zigzag shape in which the third rod member 105 and the fifth rod member 107 are parallel to each other and the fourth rod member 106 is perpendicular to the third rod member 105 and the fifth rod member 107.

As shown in fig. 5, the fourth rod 106 is provided with a mounting hole 111 whose axis is perpendicular to the surface of the second flange 51, the second flange 51 is provided with an avoiding hole 112 coaxial with the mounting hole 111, and the first flange 11 is provided with a threaded hole 113 coaxial with the avoiding hole 112. Drive rod 100 includes mating portion 114, screw thread portion 115, shaft shoulder 116 and spacing portion 117 that set gradually. The limiting portion 117 is disposed in the mounting hole 111, and a fixing member 118 is connected to the limiting portion, and the outer diameters of the shoulder 116 and the fixing member 118 are larger than the diameter of the mounting hole 111, so as to prevent the driving rod 100 from falling off, and apply force to the fourth rod 106. The threaded portion 115 passes through the avoiding hole 112 and is matched with the threaded hole 113, and the cross section of the matching portion 114 is preferably hexagonal, i.e. similar to the screw head of an external hexagonal screw, and can be matched with a wrench tool, such as an open-end wrench, a ratchet wrench, a socket wrench, and the like; the driving rod 100 is rotated clockwise or counterclockwise by a wrench, so that the driving rod 100 can make a linear motion, thereby driving the fourth rod 106 to move. Fig. 5 shows a schematic view of an external hexagonal socket wrench 119 mated with the mating portion 114. It will be appreciated that the mating portion 114 may be configured as a socket head socket to mate with a socket head wrench or socket head wrench, and the threaded hole 113 need not be configured on the first flange 11, and flanges similar to flanges may be configured on the first and

second housings

10 and 50, and the same effect may be achieved by configuring the threaded hole on the flanges.

Shaft shoulder 116 and fixing member 118 are disposed only on both sides of fourth rod 106 without pinching fourth rod 106, so as to facilitate rotation of drive lever 100. Fig. 4 shows a connection manner of the fixing member 118 and the driving rod 100, wherein a surface of the limiting portion 117 is provided with threads, the fixing member 118 is screwed on the limiting portion 117, and the fixing member 118 is preferably a nut. Fig. 6 shows another way of connecting the fixing element 118 to the drive rod 100, which connects the fixing element 118 and the stop 117 by means of radially arranged bolts 120.

Fig. 1 and 2 show a schematic view of a stop state of the check valve, in which the connecting rod 101 is moved to the right, the first blocking plate 20 is not in contact with the first rod 104, the first valve core 16 abuts against the fourth connecting hole 54 under the action of the spring force, the second blocking plate 60 is fixed by the second rod 108, so that the second valve core 56 is out of contact with the second connecting hole 14, and at this time, after the oil enters from the fourth connecting hole 54, the oil pushes away the first valve core 16 and flows out from the second connecting hole 14 through the first and second through-

holes

12, 52; if oil flows in from the second connecting hole 14, the pressure of the oil further presses the first valve element 16 against the fourth connecting hole 54 due to the first spring 19 pressing the first valve element 16 against the fourth connecting hole 54, so that the oil cannot flow into the fourth connecting hole 54, i.e., only the oil is allowed to flow in from the fourth connecting hole 54 and flow out from the second connecting hole 14.

Accordingly, fig. 7 and 8 show another blocking state of the check valve, and it is only necessary to rotate the driving rod 100 to move the connecting rod 101 to the left to change the blocking state. After the connecting rod 101 moves leftwards, the first rod 104 drives the first baffle 20 to move leftwards, so that the first valve core 16 is separated from the fourth connecting hole 54, the second rod 108 is separated from the second baffle 60, the second valve core 56 is propped against the second connecting hole 14 under the action of the spring force, and at the moment, after oil enters from the second connecting hole 14, the oil can push the second valve core 56 away and flow out from the fourth connecting hole 54 through the first through-flow hole 12 and the second through-flow hole 52; if the oil flows in from the fourth connecting hole 54, the pressure of the oil further presses the second spool 56 against the second connecting hole 14 because the second spring 59 presses the second spool 56 against the second connecting hole 14, so that the oil cannot flow into the second connecting hole 14, that is, only the oil is allowed to flow in from the second connecting hole 14 and flow out from the fourth connecting hole 54.

The flow direction of the oil liquid allowed by the check valve can be adjusted or the stop direction of the check valve (the direction for preventing the liquid from flowing reversely) can be changed only by rotating the driving rod 100, and in practice, position marks can be made on the connecting rod 101 or a check valve shell, so that the connecting rod 101 can reach a specified position, and the method is more convenient and reliable.

The one-way valve for manually adjusting the stop direction changes the states of the first valve core and the second valve core by rotating the driving rod, so that the one-way valve can conveniently control the direction of preventing the oil from reversely flowing, and is simple and convenient to operate and high in reliability.

It should be noted that the above-mentioned preferred embodiments are merely illustrative of the technical concepts and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The check valve for manually adjusting the cut-off direction comprises a first shell (10) and a second shell (50) which are connected with each other, wherein the first shell (10) is provided with a first through hole (15), the second shell (50) is provided with a fourth connecting hole (54) communicated with the first through hole (15), the check valve further comprises a first valve core (16) matched and connected with the first through hole (15) in a sliding mode and a first spring (19) extruding the first valve core (16), and the first valve core (16) can seal the fourth connecting hole (54), and the check valve is characterized in that: the second shell (50) is provided with a second through hole (55), the first shell (10) is provided with a second connecting hole (14) communicated with the second through hole (55), and the second connecting hole (14) is communicated with the fourth connecting hole (54);

the check valve further includes:

a second valve core (56) matched with the second through hole (55) in a sliding mode and a second spring (59) pressing the second valve core (56), wherein the second valve core (56) can seal the second connecting hole (14);

a connecting rod (101) connected to the first spool (16) and the second spool (56);

the driving rod (100) is rotatably connected with the connecting rod (101), and the driving rod (100) drives the connecting rod (101) to move linearly;

the one-way valve at least comprises two working states, in the first working state, the first valve core (16) is separated from the fourth connecting hole (54), and at the moment, the second valve core (56) seals the second connecting hole (14) under the action of a second spring (59); in a second operating state, the second valve core (56) is separated from the second connecting hole (14), and the first valve core (16) seals the fourth connecting hole (54) under the action of the first spring (19)

The check valve for manually adjusting the cut-off direction further comprises a first pull rod (18) connected between the first valve core (16) and the connecting rod (101), and the first pull rod (18) is in sliding fit with the connecting rod (101);

the check valve for manually adjusting the cut-off direction further comprises a second pull rod (58) connected between the second valve core (56) and the connecting rod (101), and the second pull rod (58) is in sliding fit with the connecting rod (101).

2. A check valve for manually adjusting a shut-off direction as defined in claim 1, wherein: the surface of the first shell (10) or the second shell (20) is provided with a flange, and the driving rod (100) is in threaded connection with the flange.

3. A check valve for manually adjusting a shut-off direction as defined in claim 1, wherein: one end of the driving rod (100) is provided with a matching part (114) matched with a wrench tool.

4. A check valve for manually adjusting a shut-off direction as defined in claim 1, wherein: the connecting rod (101) comprises a fourth rod (106), the driving rod (100) comprises a shaft shoulder (116), one end of the driving rod (100) is further connected with a fixing piece (118), and the fixing piece (118) and the shaft shoulder (116) are respectively located on two sides of the fourth rod (106).

5. A check valve for manually adjusting a shut-off direction as defined in claim 1, wherein: the first tie rod (18) is further provided with a first baffle (20), the link (101) comprising a first lever (104) located between the first baffle (20) and the first housing (10).

6. A check valve for manually adjusting a shut-off direction as defined in claim 1, wherein: the second tie rod (58) is provided with a second baffle (60), and the link (101) comprises a second lever (108) located between the second baffle (60) and the second housing (50).

7. A check valve for manually adjusting a shut-off direction as defined in claim 1, wherein: the first shell (10) is provided with a first through hole (12) communicated with the first through hole (15) and the second connecting hole (14); and a second through hole (52) communicated with the second through hole (55) and the fourth connecting hole (54) is formed in the second shell (50), and the first through hole (12) is matched with the second through hole (52).

8. A check valve for manually adjusting a shut-off direction as defined in claim 1, wherein: the first shell (10) is further provided with a first anti-back sleeve (17), and the first spring (19) is abutted between the first anti-back sleeve (17) and the first valve core (16); the second shell (50) is further provided with a second anti-back sleeve (57), and the second spring (59) is abutted between the second anti-back sleeve (17) and the second valve core (56).