CN216555487U

CN216555487U - Piston type valve core

Info

Publication number: CN216555487U
Application number: CN202123193357.0U
Authority: CN
Inventors: 黄刚; 刘海锋; 王亮亮
Original assignee: Hunan Zhuoyu Technology Co ltd
Current assignee: Hunan Zhuoyu Technology Co ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-05-17
Anticipated expiration: 2031-12-17

Abstract

The utility model discloses a piston type valve core, which comprises a valve sleeve, a piston and a valve plate, wherein the valve sleeve is provided with a counter bore, the piston is arranged in the counter bore from the open end of the counter bore and is matched with the counter bore so as to be capable of reciprocating and linear motion between a first position and a second position, the piston and the bottom of the counter bore enclose an air cavity, the valve sleeve is provided with a first valve port communicated with the air cavity at the bottom surface of the counter bore and a second valve port communicated with the air cavity at the side surface of the counter bore, the valve plate is positioned at the outer side of the valve sleeve, the valve plate is detachably connected with the piston through a detachable connecting component penetrating through the first valve port, the valve plate is far away from the first valve port when the piston is at the first position, the valve plate is attached to the surface of the valve sleeve to seal the first valve port when the piston is at the second position, and an elastic mechanism used for forcing the piston to move to the second position is arranged in the air cavity. The piston type valve core has the advantages of simplicity and convenience in processing and assembly, high assembly efficiency, convenience in maintenance, low requirement on cleanliness of an air source and the like.

Description

Piston type valve core

Technical Field

The utility model relates to the technical field of control valves, in particular to a piston type valve core.

Background

The piston type valve core is widely used in a gas circuit reversing valve, and as shown in fig. 1 to fig. 3, the basic structure of the piston type valve core is that a valve plate 801 is connected to a piston 803 by a valve rod 802, power is provided by the piston 803, and the valve rod 802 transmits piston force pushing power to the valve plate 801. The valve plate 801, valve stem 802 and piston 803 are joined to form an "I" shape, so this mechanism is sometimes referred to as an I-shaped core member. The I-shaped valve core structure is widely applied to a main power source to directly or indirectly participate in a gas circuit or a hydraulic circuit due to the advantages of simple manufacturing process, low cost and the like, so that the functions of circuit reversing, on-off cut-off and the like are realized. In the figure, the port E, A, B is an external air passage port, C is an internal passage of the valve body (arranged on the partition 805), and D is a pilot air port of the piston. When air is not introduced, the piston 803 is pushed to the right side under the action of the elastic force of the spring 804, the valve plate 801 cuts off the channel C, and the interface E is communicated with the interface A; after the pilot air port D is ventilated, the pilot air pushes the piston 803 to move leftwards, the valve plate 801 overcomes the spring force and the pressure of the port E to cut off the port E, and the port a is communicated with the port B through the internal channel C.

In the piston type valve core, the valve plate 801 is in threaded connection with the valve rod 802, the piston 803 is also in threaded connection with the valve rod 802, the partition plate 805 where the channel C is located needs to be spanned by the I-shaped valve core structure, and when the valve core is assembled, the partition plate 805 needs to be preassembled between the valve plate 801 and the piston 803 in advance, so that the defects of high processing and manufacturing difficulty, high cost, low assembly efficiency, poor connection stability and inconvenience in maintenance exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of overcoming the defects in the prior art and provide the piston type valve core which is simple and convenient to process and assemble, high in assembly efficiency, convenient to maintain and low in requirement on the cleanliness of an air source.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a piston type valve core, includes valve barrel, piston and valve block, the valve barrel has the counter bore, the piston is packed into the counter bore from the open end of counter bore and cooperates with the counter bore in order can be between primary importance and secondary importance reciprocal linear motion, the piston encloses into the air cavity with the bottom of counter bore, the valve barrel is equipped with the first valve port of counter bore bottom surface and air cavity intercommunication and the second valve port of counter bore side and air cavity intercommunication, the valve block is located the outside of valve barrel, the valve block through pass the coupling assembling of dismantling of first valve port with the piston is connected with removable mounting, and the valve block is kept away from when the piston is in the primary importance first valve port, and valve block and valve barrel surface laminating are sealed when the piston is in the secondary importance first valve port, install the elastic mechanism who is used for forcing the piston to the motion of secondary importance in the air cavity.

As a further improvement of the above technical solution:

the detachable connecting assembly comprises a through hole penetrating through the piston along the reciprocating linear motion direction of the piston, the valve plate is connected with the piston through a detachable connecting mechanism penetrating through the through hole, and the detachable connecting assembly further comprises a sealing mechanism sealing a gap between the detachable connecting mechanism and the through hole.

The detachable connecting mechanism comprises a connecting rod portion arranged on the valve plate, the connecting rod portion is arranged in the through hole in a penetrating mode, and a locking piece which is connected with the connecting rod portion in a detachable mode and matched with the valve plate to clamp and fix the piston is arranged on one side, away from the air cavity, of the piston.

The connecting rod portion penetrates through the through hole to extend to one side, away from the air cavity, of the piston, and the locking piece is a locking nut in threaded connection with the connecting rod portion.

The piston is provided with a top rod part extending towards the valve plate, the top rod part extends into and exits from the first valve port along with the reciprocating motion of the piston, the through hole penetrates through the top rod part and the piston from the extending end of the top rod part, and the top rod part and the connecting rod part are respectively provided with a rotation stopping hole for the rotation stopping part to penetrate through the second valve port to be inserted so as to stop the relative rotation of the top rod part and the connecting rod part.

The elastic mechanism comprises a spring, the spring is sleeved outside the ejector rod part, and two ends of the spring are respectively connected with the piston on the bottom surface of the counter bore correspondingly.

The sealing mechanism is a sealing ring arranged in a gap between the connecting rod part and the inner wall of the through hole.

The connecting rod part is of a cylindrical structure, and the through hole is a circular hole.

The valve block is equipped with the seal cover with the mode overcoat that can dismantle, the seal cover is equipped with and is used for sealing the first sealed bulge loop portion of first valve port with valve barrel surface laminating.

And a second sealing convex ring part is arranged on one side of the sealing sleeve, which is far away from the first valve port.

Compared with the prior art, the utility model has the advantages that:

in the piston type valve core, the valve sleeve is provided with the counter bore which can be filled with the piston, the movable valve sheet is detachably connected with the piston through the detachable connecting component, the valve sleeve, the piston and the valve sheet can be manufactured and assembled separately, and the valve sleeve, the piston and the valve sheet are easy and convenient to process and assemble, high in assembling efficiency and convenient to maintain. Meanwhile, the valve plate seals the first valve port in a manner of being attached to the surface of the valve sleeve, the valve plate is good in sealing performance, low in requirements on precision of parts and assembly precision, and low in requirements on cleanliness of an air source.

Drawings

Fig. 1 is a schematic cross-sectional view of a conventional piston-type directional control valve with a valve core in a neutral position.

Fig. 2 is a schematic cross-sectional view of a conventional piston-type directional control valve when a spool is in a left position.

Fig. 3 is a schematic cross-sectional view of a conventional piston-type directional control valve when a valve core is in a right position.

Fig. 4 is a front view structure schematic diagram of the piston type valve core.

Fig. 5 is a schematic cross-sectional view of the piston-type spool when the valve plate is in the first position.

Illustration of the drawings:

1. a valve housing; 10. an air cavity; 11. a first valve port; 12. a second valve port; 2. a piston; 21. a through hole; 22. a top rod part; 3. a valve plate; 31. a link section; 4. locking the nut; 5. a rotation stopping hole; 6. a spring; 7. a seal ring; 8. sealing sleeves; 81. a first sealing convex ring part; 82. and the second sealing convex ring part.

Detailed Description

The utility model is described in further detail below with reference to the figures and specific examples.

As shown in fig. 4 and 5, the piston type valve core of the present embodiment includes a valve sleeve 1, a piston 2 and a valve plate 3, the valve sleeve 1 has a counter bore, the piston 2 is installed into the counter bore from an open end of the counter bore and is matched with the counter bore to be capable of reciprocating between a first position and a second position, the piston 2 and a bottom of the counter bore enclose an air cavity 10, the valve sleeve 1 is provided with a first valve port 11 communicated with the air cavity 10 at a bottom surface of the counter bore and a second valve port 12 communicated with the air cavity 10 at a side surface of the counter bore, the valve plate 3 is located at an outer side of the valve sleeve 1, the valve plate 3 is detachably connected with the piston 2 by a detachable connection assembly passing through the first valve port 11, and the valve plate 3 is far away from the first valve port 11 when the piston 2 is at the first position, when the piston 2 is at the second position, the valve plate 3 is attached to the surface of the valve sleeve 1 to close the first valve port 11, and an elastic mechanism for forcing the piston 2 to move to the second position is installed in the air chamber 10.

In the piston type valve core, the valve sleeve 1 is provided with a counter bore which can be filled with the piston 2, the movable valve sheet 3 is connected with the piston 2 in a detachable mode through the detachable connecting component, the valve sleeve 1, the piston 2 and the valve sheet 3 can be manufactured separately and then assembled, and the valve sleeve, the piston and the valve sheet are convenient to process and assemble, high in assembling efficiency and convenient to maintain. Meanwhile, the valve plate 3 seals the first valve port 11 by fitting with the surface of the valve sleeve 1, the sealing performance is good, the requirements on the precision of parts and the assembly precision are low, and the requirement on the cleanliness of an air source is low.

In this embodiment, can dismantle coupling assembling includes and runs through the perforating hole 21 that piston 2 set up along 2 reciprocating linear motion directions of piston, and valve block 3 links to each other with piston 2 through the detachable coupling mechanism who passes perforating hole 21, can dismantle coupling assembling still includes the sealing mechanism who will dismantle clearance seal between coupling mechanism and the perforating hole 21. The piston 2 is provided with a through hole 21, and the detachable connecting mechanism penetrates through the through hole 21 to be connected with the piston 2 and the valve plate 3, so that the structure is compact, and the connection stability is good.

In this embodiment, the detachable connection mechanism includes a connecting rod portion 31 disposed on the valve plate 3, the connecting rod portion 31 is disposed in the through hole 21 in a penetrating manner, and a locking member detachably connected to the connecting rod portion 31 and cooperating with the valve plate 3 to clamp and fix the piston 2 is disposed on one side of the piston 2 away from the air cavity 10. Adopt the retaining member and the connecting rod portion 31 of piston 2 keeping away from air cavity 10 one side to dismantle and be connected to utilize retaining member and valve block 3 cooperation to press from both sides the mode of tight fixed piston 2 and be connected piston 2 and valve block 3 fixedly, not only the assembly is simple and convenient, and piston 2 is good with the steadiness of being connected of valve block 3.

In this embodiment, the connecting rod portion 31 extends to the side of the piston 2 away from the air chamber 10 through the through hole 21, and the locking member is a locking nut 4 screwed with the connecting rod portion 31. The valve plate 3 can be mounted and dismounted only by screwing the locking nut 4, the mounting and dismounting are simple and convenient, the connection mode of the locking nut 4 and the connecting rod part 31 in threaded fit is simple in structure and stable and reliable in connection, the internal space of the through hole 21 cannot be occupied, and the size of the piston 2 is favorably reduced.

In this embodiment, the piston 2 has a stem portion 22 extending toward the valve plate 3, the stem portion 22 extends into and exits from the air chamber 10 from the first valve port 11 along with the reciprocating motion of the piston 2, the through hole 21 penetrates the stem portion 22 and the piston 2 from the extending end of the stem portion 22, and the stem portion 22 and the connecting rod portion 31 are both provided with rotation-stopping holes 5 for inserting rotation-stopping members through the second valve port 12 to stop the relative rotation of the stem portion 22 and the connecting rod portion 31. In the assembling mode, after the connecting rod part 31 passes through the through hole 21, the rotation stopping piece can be inserted into the second valve port 12 and the rotation stopping holes 5 of the ejector rod part 22 and the connecting rod part 31, so that the relative rotation of the ejector rod part 22, the connecting rod part 31 and the valve sleeve 1 can be prevented, the locking nut 4 can be conveniently connected and assembled on the connecting rod part 31, and the assembling simplicity is improved.

In this embodiment, the elastic mechanism includes a spring 6, the spring 6 is sleeved outside the ejector rod portion 22, and two ends of the spring 6 are respectively connected with the piston 2 on the bottom surface of the counter bore correspondingly. The elastic mechanism has the advantages of simple and compact structure, easy assembly, and stable and reliable operation.

In the present embodiment, the seal mechanism is the seal ring 7 provided in the gap between the link portion 31 and the inner wall of the through hole 21.

In this embodiment, the connecting rod portion 31 has a cylindrical structure, and the through hole 21 has a circular hole, so that the processing is convenient and the processing cost is low.

In this embodiment, the valve plate 3 is sleeved with a sealing sleeve 8 in a detachable manner, and the sealing sleeve 8 is provided with a first sealing convex ring part 81 for sealing the first valve port 11 by being attached to the surface of the valve sleeve 1. First sealed protruding ring portion 81 can better realize sealed with valve barrel 1 surface laminating to be convenient for adjust through changing different seal cover 8 with the sealed face area of valve barrel 1 surface laminating, satisfy different opening pressure's demand.

In this embodiment, one side of the sealing sleeve 8 away from the first valve port 11 is provided with a second sealing convex ring portion 82, so as to be convenient for fitting and sealing with the surface provided with the valve port during assembly.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-described embodiments. Modifications and variations that may occur to those skilled in the art without departing from the spirit and scope of the utility model are to be considered as within the scope of the utility model.

Claims

1. The utility model provides a piston type valve core, includes valve barrel (1), piston (2) and valve block (3), its characterized in that: the valve sleeve (1) is provided with a counter bore, the piston (2) is arranged in the counter bore from the open end of the counter bore and is matched with the counter bore so as to be capable of reciprocating linear motion between a first position and a second position, the piston (2) and the bottom of the counter bore enclose an air cavity (10), the valve sleeve (1) is provided with a first valve port (11) communicated with the air cavity (10) on the bottom surface of the counter bore and a second valve port (12) communicated with the air cavity (10) on the side surface of the counter bore, the valve sheet (3) is positioned on the outer side of the valve sleeve (1), the valve sheet (3) is detachably connected with the piston (2) through a detachable connection assembly penetrating through the first valve port (11), the valve sheet (3) is far away from the first valve port (11) when the piston (2) is at the first position, and the valve sheet (3) is attached to the surface of the valve sleeve (1) to seal the first valve port (11) when the piston (2) is at the second position, an elastic mechanism for forcing the piston (2) to move to the second position is arranged in the air cavity (10).

2. The piston type valve spool according to claim 1, wherein: can dismantle coupling assembling includes perforating hole (21) that runs through piston (2) setting along piston (2) reciprocating linear motion direction, valve block (3) are through passing the coupling mechanism dismantled of perforating hole (21) links to each other with piston (2), can dismantle coupling assembling still include with can dismantle the sealing mechanism of clearance seal between coupling mechanism and perforating hole (21).

3. The piston type valve spool according to claim 2, wherein: can dismantle coupling mechanism is including locating connecting rod portion (31) on valve block (3), connecting rod portion (31) are worn to establish in perforating hole (21), one side that air cavity (10) were kept away from in piston (2) is equipped with and links to each other with connecting rod portion (31) with can dismantle the mode and presss from both sides the retaining member of tight fixed piston (2) with valve block (3) cooperation.

4. The piston type valve spool according to claim 3 wherein: the connecting rod part (31) penetrates through the through hole (21) and extends to one side, away from the air cavity (10), of the piston (2), and the locking piece is a locking nut (4) in threaded connection with the connecting rod part (31).

5. The piston type valve spool according to claim 3 wherein: the piston (2) is provided with a top rod part (22) extending towards the valve plate (3), the top rod part (22) extends into and out of the air cavity (10) from the first valve port (11) along with the reciprocating motion of the piston (2), the through hole (21) penetrates through the top rod part (22) and the piston (2) from the extending end of the top rod part (22), and the top rod part (22) and the connecting rod part (31) are respectively provided with a rotation stopping hole (5) for a rotation stopping piece to penetrate through the second valve port (12) to be inserted so as to stop the relative rotation of the top rod part (22) and the connecting rod part (31).

6. The piston type valve spool according to claim 5 wherein: the elastic mechanism comprises a spring (6), the spring (6) is sleeved outside the ejector rod part (22), and two ends of the spring (6) are respectively connected with the piston (2) on the bottom surface of the counter bore correspondingly.

7. The piston type valve spool according to claim 3 wherein: the sealing mechanism is a sealing ring (7) arranged in a gap between the connecting rod part (31) and the inner wall of the through hole (21).

8. The piston type valve spool according to claim 3 wherein: the connecting rod part (31) is of a cylindrical structure, and the through hole (21) is a circular hole.

9. The piston valve spool according to any one of claims 1 to 8, wherein: valve block (3) are equipped with seal cover (8) with the mode overcoat of dismantling, seal cover (8) are equipped with and are used for sealing first sealed protruding ring portion (81) of first valve port (11) with valve barrel (1) surface laminating.

10. The piston valve spool of claim 9 wherein: and a second sealing convex ring part (82) is arranged on one side of the sealing sleeve (8) far away from the first valve port (11).