CN220929824U - Floating type two-way cartridge valve - Google Patents

Abstract

The utility model discloses a floating two-way cartridge valve, and belongs to the technical field of hydraulic valves; the valve cover is positioned on one side of the cover plate in the first direction and is in contact with the cover plate, the valve cover is provided with a first cavity extending along the first direction, the first cavity penetrates through two opposite end surfaces of the valve cover, a first step structure is arranged in the first cavity, the valve sleeve is positioned on one side of the valve cover, which is far away from the cover plate, and is in contact with the first step structure, the valve sleeve is provided with a second cavity extending along the first direction, the second cavity penetrates through the end surface of the valve sleeve, which is close to the valve cover, the valve sleeve is provided with a first opening and a second opening, which are perpendicular to the central axis and are communicated with the second cavity, the second opening is positioned on the end surface of the valve sleeve, which is far away from the valve cover, the valve core extends along the first direction and is arranged in the second cavity, the second opening can be opened and closed, and the spring extends along the first direction and is respectively in contact with the cover plate and the valve core. The utility model can avoid the breakage of the bolts of the cover plate caused by uneven stress when the bolts are impacted, and improve the sealing effect between the joint surfaces.

Description

Floating type two-way cartridge valve

Technical Field

The utility model belongs to the technical field of hydraulic valves, and particularly relates to a floating two-way cartridge valve.

Background

At present, the hydraulic valve is classified from the structure, including three kinds of structural style, do respectively: ① Traditional slide valve designs (pressure typically at 350bar, flow typically no greater than 200L/min, max no greater than 1200L/min); ② Threaded cartridge valve configuration (pressure typically at 350bar, flow typically no greater than 600L/min, max no greater than 1600L/min); ③ Two-way cartridge valve structure (pressure is usually 420bar, flow rate can reach 30000L/min). The spool valve and the threaded cartridge valve cannot be used in high-pressure and larger-flow application scenes.

The two-way cartridge valve is generally composed of a cover plate (also called a control cover plate), a valve sleeve, a valve core and a valve body (also called a valve block), has high requirements on the response speed, the control precision and the impact resistance of the control valve in the hydraulic field, and has great advantages in the aspects of the response speed and the impact resistance. However, the existing two-way cartridge valve structure has the following technical problems: due to the fact that the problems of errors such as flatness errors of the cover plate and the upper surface of the valve sleeve, perpendicularity errors of the upper surface of the valve sleeve and the center of a hole of the valve sleeve and the like exist, uneven stress of bolts on the cover plate is easily caused when the cover plate is impacted, and therefore the conditions of broken bolts or oil seepage of a joint surface are caused.

Disclosure of utility model

In order to solve the technical problems, the utility model aims to provide a floating two-way cartridge valve, which can make up for the flatness error of the upper surface of a cover plate and a valve sleeve and the perpendicularity error of the upper surface of the valve sleeve and the center of a hole of the valve sleeve, reduce the unbalanced load phenomenon of impact load, thereby avoiding the breakage of bolts on the cover plate caused by uneven stress when the bolts are impacted and improving the sealing effect between joint surfaces.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides a floating two-way cartridge valve, comprising:

A cover plate;

The valve cover is positioned at one side of the cover plate in the first direction and is in contact with the cover plate, the valve cover is provided with a first cavity extending along the first direction, the first cavity penetrates through two opposite end surfaces of the valve cover, and a first step structure is arranged in the first cavity;

The valve sleeve is positioned on one side of the valve cover, which is far away from the cover plate, and is in contact with the first step structure, the valve sleeve is provided with a second cavity extending along a first direction, the second cavity penetrates through the end face of the valve sleeve, which is close to the valve cover, the valve sleeve is provided with a first opening and a second opening which are communicated with the second cavity, the central axis of the first opening is perpendicular to the central axis of the second opening, and the second opening is positioned on the end face of the valve sleeve, which is far away from the valve cover;

The valve core extends along the first direction, is arranged in the second cavity and can open and close the second opening;

And the spring extends along the first direction and is respectively contacted with the cover plate and the valve core.

The floating two-way cartridge valve provided by the utility model has at least the following beneficial effects: the valve cover is additionally arranged between the valve sleeve and the cover plate, when the cover plate, the valve cover, the valve sleeve and the valve core are arranged on the valve body, the valve cover can be in sealing contact with the cover plate and also can be in sealing contact with the valve body, the valve cover can be subjected to the pressure action of high-pressure fluid in the valve body, so that the valve cover has a certain degree of floating function, the flatness error of the upper surface of the cover plate and the valve sleeve and the perpendicularity error of the upper surface of the valve sleeve and the center of a hole of the valve sleeve are made up to a certain degree, the self-adaptive fit of the valve cover and the cover plate can be ensured, the sealing effect of the joint surface between the valve cover and the cover plate is improved, the problem that the joint surface seepage condition is avoided, and the problem that in the prior art, such as the flatness error of the upper surface of the cover plate and the valve sleeve and the perpendicularity error of the center of the valve sleeve are easy to cause impact abnormal sound, and the problem that the bolt on the cover plate is stressed unevenly is broken is caused is solved.

Moreover, the spring is positioned between the cover plate and the valve core, the floating function of the valve cover is not influenced by the action of the spring, the problems of difficult assembly and reduced assembly precision caused by the influence of the spring on the assembly relation between the valve cover and the valve sleeve can be avoided, and therefore the floating two-way cartridge valve with the structure can be used as a valve element with large drift diameter to be applied to a high-pressure and high-flow hydraulic system.

As a further improvement of the above technical solution, the valve core is provided with a third cavity extending along the first direction, the third cavity penetrates through the end face of the valve core, which is close to the valve cover, and one end of the spring extends into the third cavity and abuts against the wall surface of the third cavity.

As a further improvement of the technical scheme, an annular step groove with a central axis extending along the first direction is arranged in the third cavity, and the annular step groove is arranged close to the valve cover.

As a further improvement of the technical scheme, a threaded hole is formed in the wall surface, far away from the valve cover, of the third cavity.

As a further improvement of the technical scheme, the valve cover is provided with a first annular groove and a second annular groove, the central axes of the first annular groove and the second annular groove extend along the first direction, the first annular groove is positioned on the end face of the valve cover, which is in contact with the cover plate, a first sealing piece is arranged in the first annular groove, the second annular groove is positioned on the peripheral surface of the valve cover, and a second sealing piece is arranged in the second annular groove.

As a further improvement of the above technical solution, the first sealing member is a first O-ring.

As a further improvement of the above solution, the second sealing member comprises a second O-ring and a first retainer ring, the second O-ring being located between the first retainer ring and the valve sleeve.

As a further improvement of the above technical solution, a second step structure is disposed in the first cavity, and the second step structure is located between the cover plate and the first step structure.

As a further improvement of the technical scheme, a third annular groove and a fourth annular groove with central axes extending along the first direction are formed in the outer peripheral surface of the valve sleeve, the third annular groove and the fourth annular groove are respectively located at two opposite ends of the valve sleeve in the first direction, and third sealing elements are respectively arranged in the third annular groove and the fourth annular groove.

As a further improvement of the above technical solution, the third sealing member includes a third O-ring and second check rings, two second check rings are provided, and the two second check rings are respectively located at two opposite sides of the third O-ring in the first direction.

Additional features and advantages of the utility model 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 utility model.

Drawings

The utility model is further described below with reference to the drawings and examples;

FIG. 1 is a schematic diagram of a floating two-way cartridge valve according to an embodiment of the present utility model, wherein a cover plate and a valve body are omitted;

FIG. 2 is a schematic view of a valve cover in a floating two-way cartridge valve according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a valve housing in a floating two-way cartridge valve according to an embodiment of the present utility model;

FIG. 4 is a schematic structural diagram of a valve core in the floating two-way cartridge valve according to the embodiment of the present utility model;

Fig. 5 is a schematic structural diagram of a floating two-way cartridge valve according to an embodiment of the present utility model.

The figures are marked as follows: 100. a valve cover; 110. a first cavity; 120. a first annular groove; 130. a second annular groove; 140. a first step structure; 150. a second step structure; 200. a valve sleeve; 210. a second cavity; 220. a first opening; 230. a second opening; 240. a third annular groove; 250. a fourth annular groove; 300. a valve core; 310. a third cavity; 400. a spring; 510. a first O-ring; 520. a second O-ring; 530. a first retainer ring; 540. a third O-ring; 550. the second check ring; 600. a cover plate; 700. a valve body; 710. a mounting cavity; 720. a first opening; 730. a second opening; 800. and a pilot control oil passage.

Detailed Description

Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, if there is a word description such as "a plurality" or the like, the meaning of the plurality is one or more, the meaning of the plurality is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and above, below, within, etc. are understood to include the present number. The description of first, second, and third is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1-5, several embodiments of the floating two-way cartridge valve of the present utility model are illustrated below.

As shown in fig. 1 to 5, the embodiment of the utility model provides a floating two-way cartridge valve, which can compensate for the flatness error of the upper surfaces of the cover plate 600 and the valve sleeve 200 and the perpendicularity error of the upper surfaces of the valve sleeve 200 and the center of the hole of the valve sleeve 200 to a certain extent, can ensure the self-adaptive fitting of the valve cover 100 and the cover plate 600, so that the sealing effect of the joint surface between the valve cover 100 and the cover plate 600 is improved, and can reduce the unbalanced load phenomenon of impact load, thereby avoiding the problem that the bolts on the cover plate 600 are broken due to uneven stress when impacted.

The floating two-way cartridge valve of this embodiment includes a cover plate 600 (or control cover plate), a valve cap 100, a valve sleeve 200, a valve core 300, a spring 400, and a valve body 700 (or valve block).

The floating two-way cartridge valve has a first direction and a second direction, wherein the first direction is perpendicular to the second direction. In the present embodiment, the first direction is assumed to be the up-down direction, and the second direction is assumed to be the left-right direction.

In the present embodiment, the cover plate 600 is located above the valve body 700. It will be appreciated that the cover 600 (not shown) and the valve body 700 (not shown) may be fixedly connected by bolts. The valve body 700 is hollow internally with a mounting cavity 710 so as to dispose the valve cover 100 and the valve housing 200 within the mounting cavity 710. The valve body 700 is provided with a first opening 720 and a second opening 730, and the first opening 720 and the second opening 730 are both communicated with the mounting cavity 710, wherein one of the first opening 720 and the second opening 730 is a liquid inlet, and the other is a liquid outlet. Also, the installation cavity 710 penetrates the upper surface of the valve body 700 and forms an opening structure, and at this time, the cover plate 600 can cover the opening structure of the valve body 700. In addition, the floating type two-way cartridge valve is provided with a pilot control oil passage 800, and the pilot control oil passage 800 is extended and arranged through the valve body 700 and the cover plate 600 in sequence and extends to an opening structure of the valve body 700, so that the pilot control oil passage 800 is communicated with the installation cavity 710.

The cap 100 is positioned at one side of the cap plate 600 in the first direction, the cap 100 is disposed in the mounting cavity 710 of the valve body 700, and the cap 100 is in contact with the cap plate 600. The valve cover 100 is internally hollow with a first cavity 110, the first cavity 110 extends along a first direction of the valve cover 100, and the first cavity 110 penetrates opposite end surfaces of the valve cover 100 in the first direction, respectively. In the present embodiment, the valve cover 100 is positioned under the cover plate 600, and both the upper and lower surfaces of the valve cover 100 are of an opening structure, and the opening structure of the upper surface of the valve cover 100 is larger in diameter size than the opening structure of the lower surface of the valve cover 100 so that the valve sleeve 200 can be partially inserted into the first cavity 110.

The bonnet 100 is positioned over the first aperture 720 and the second aperture 730 of the valve body 700.

A first step structure 140 is disposed within the first cavity 110. Specifically, the lower surface of the valve cover 100 is provided with a first groove, which is coaxially disposed with and communicated with the first cavity 110, and the inner diameter of the first groove is greater than that of the first cavity 110, so that the junction between the first groove and the first cavity 110 forms a first step structure 140.

The valve sleeve 200 is positioned on a side of the valve cover 100 remote from the cover plate 600, the valve sleeve 200 is disposed within the mounting cavity 710 of the valve body 700, and the valve sleeve 200 is capable of extending into the first cavity 110 of the valve cover 100 and into surface-to-surface contact with the first stepped structure 140. The valve housing 200 is internally hollow with a second cavity 210 formed therein, the second cavity 210 extending along a first direction of the valve housing 200, and the second cavity 210 penetrating an end surface of the valve housing 200 near the valve cover 100 such that the second cavity 210 can communicate with the first cavity 110.

The valve sleeve 200 is provided with a first opening 220 and a second opening 230. Wherein, the first opening 220 and the second opening 230 are both communicated with the second cavity 210, and one of the first opening 220 and the second opening 230 can be used as a liquid inlet, and the other can be used as a liquid outlet. Moreover, the central axis of the first opening 220 is perpendicular to the central axis of the second opening 230, the first opening 220 is located on the outer circumferential surface of the valve sleeve 200, and the second opening 230 is located on the end surface of the valve sleeve 200 away from the valve cover 100. It is understood that the number of the first openings 220 is not limited to one, and when a plurality of first openings 220 are provided, all of the first openings 220 are arranged in a circumferential arrangement around the central axis of the valve housing 200.

In this embodiment, the valve sleeve 200 is positioned below the valve cover 100, the upper end of the valve sleeve 200 can be inserted into the first cavity 110, and the upper surface of the valve sleeve 200 is attached to the first stepped structure 140 of the valve cover 100. The first openings 220 are provided in two and are located at both left and right sides of the valve housing 200, respectively. The second opening 230 is located at the lower end surface of the valve housing 200.

The length direction of the valve body 300 extends along the first direction, the valve body 300 is disposed in the second cavity 210 of the valve housing 200, and the valve body 300 is movable along the first direction in the second cavity 210, so that the valve body 300 can open and close the second opening 230 of the valve housing 200. It will be appreciated that in the present embodiment, when the second opening 230 of the valve housing 200 is in an open state after the valve core 300 is moved upward, the first opening 220 and the second opening 230 communicate, so that the fluid can smoothly flow; when the valve body 300 moves downward to a proper position, the second opening 230 of the valve housing 200 is closed, and the first opening 220 and the second opening 230 are not communicated, so that the fluid cannot smoothly flow.

The length direction of the spring 400 extends along the first direction, and one end of the spring 400 contacts the valve body 300 and the opposite end of the spring 400 contacts the cover 600. It will be appreciated that the upper portion of the valve core 300 is urged to move downward by the spring force of the spring 400 and the oil pressure in the pilot control oil passage 800, and thus the valve core 300 is able to block the second opening 230 of the valve housing 200.

It will be appreciated that in the floating two-way cartridge valve of the present embodiment, when the cover plate 600, the valve cap 100, the valve housing 200 and the valve core 300 are mounted at the corresponding positions on the valve body 700, the upper surface of the valve cap 100 is in sealing contact with the cover plate 600, the outer circumferential surface of the valve cap 100 is in sealing contact with the inner circumferential surface of the mounting cavity 710 of the valve body 700, the upper portion of the valve housing 200 is inserted into the first cavity 110 of the valve cap 100, the upper surface of the valve housing 200 is in abutment with the first stepped structure 140 of the valve cap 100, the outer circumferential surface of the valve housing 200 is in sealing contact with the inner circumferential surface of the first cavity 110 of the valve cap 100, the lower portion of the valve housing 200 is in sealing contact with the inner circumferential surface of the mounting cavity 710 of the valve body 700, at this time, the second opening 230 is in communication with the second opening 730, the first opening 220 is in communication with the mounting cavity 710 of the valve body 700, the valve core 300 is disposed in the second cavity 210 of the valve housing 200, the upper end of the spring 400 abuts against the lower surface of the cover plate 600, and the lower end of the spring 400 abuts against the upper portion of the valve core 300.

Because the valve cover 100 is additionally arranged between the valve sleeve 200 and the cover plate 600, the valve cover 100 can be subjected to the pressure action of high-pressure fluid in the installation cavity 710 of the valve body 700, so that the valve cover 100 has a certain degree of floating function, flatness errors of the upper surfaces of the cover plate 600 and the valve sleeve 200 and perpendicularity errors of the upper surfaces of the valve sleeve 200 and the hole center of the valve sleeve 200 are compensated to a certain degree, the self-adaptive bonding of the valve cover 100 and the cover plate 600 can be ensured, the sealing effect of the bonding surface between the valve cover 100 and the cover plate 600 is improved, the liquid seepage condition of the bonding surface is avoided, in addition, the unbalanced load phenomenon of impact load can be reduced, and the problem that in the prior art, abnormal impact is easily caused due to the flatness errors of the upper surfaces of the cover plate 600 and the valve sleeve 200 and the hole center of the valve sleeve 200 is solved, and the problem that the bolts on the cover plate 600 are stressed unevenly and broken is caused.

In addition, the spring 400 is arranged between the cover plate 600 and the valve core 300, the elastic force of the spring 400 does not act on the valve cover 100, and the floating function of the valve cover 100 is not affected by the elastic force of the spring 400, so that in the assembling process of the floating type two-way cartridge valve, the valve cover 100 is not pushed away from the valve sleeve 200 under the elastic force of the spring 400, the cover plate 600 can be easily pressed down and fixedly connected with the valve body 700, the problems that the assembling relationship between the valve cover 100 and the valve sleeve 200 is affected by the spring 400, the assembling difficulty and the assembling precision are reduced are avoided, and the floating type two-way cartridge valve with the structure can be used as a valve element with large drift diameter to be applied to a high-pressure and large-flow hydraulic system.

In addition, the floating two-way cartridge valve of the embodiment adopts the valve cover 100 with a floating function, so that the acting force of the valve sleeve 200 on the cover plate 600 can be weakened, the stress area of the cover plate 600 can be reduced, and the material requirements of the cover plate 600, the processing difficulty of the mounting cavity 710 of the valve body 700 and the strength requirements of the connecting bolts can be reduced.

It will be appreciated that the floating two-way cartridge valve of this embodiment can be machined to a valve element having a small diameter or a valve element having a large diameter.

It can be appreciated that when the first opening 220 of the valve housing 200 is used as a liquid outlet and the second opening 230 is used as a liquid inlet, if the liquid pressure applied to the lower end surface of the valve core 300 is greater than the sum of the frictional resistance of the upward movement of the valve core 300, the elastic force of the spring 400 and the oil pressure acting force of the pilot control oil passage 800, the valve core 300 will move upward, and the second opening 230 of the valve housing 200 will be opened, so that the first opening 720 and the second opening 730 of the valve body 700 will be communicated, and the liquid will be circulated.

When the first opening 220 of the valve housing 200 is used as a fluid inlet and the second opening 230 is used as a fluid outlet, if the fluid pressure applied to the middle portion of the valve core 300 is greater than the sum of the frictional resistance of the upward movement of the valve core 300, the elastic force of the spring 400 and the oil pressure acting force of the pilot control oil passage 800, the valve core 300 will move upward, and the second opening 230 of the valve housing 200 will be opened, so that the first opening 720 and the second opening 730 of the valve body 700 will be communicated, and fluid will be circulated.

When the first opening 720 and the second opening 730 are communicated, if the sum of the elastic force of the spring 400 and the oil pressure force of the pilot control oil passage 800 is greater than the sum of the frictional resistance of the downward movement of the spool 300 and the hydraulic pressure applied to the lower end surface and the middle portion of the spool 300, the spool 300 moves downward and blocks the second opening 230, so that the first opening 720 and the second opening 730 are not communicated.

In some embodiments, the valve core 300 is hollow with a third cavity 310 formed therein, the third air extends along the first direction of the valve core 300, and the third cavity 310 penetrates through the end surface of the valve core 300 near the valve cover 100, and one end of the spring 400 can extend into the third cavity 310 and abut against the wall surface of the third cavity 310. Specifically, the cross-sectional shape of the third cavity 310 may be circular, the third cavity 310 penetrates through the upper end surface of the valve core 300, and the lower end of the spring 400 extends into the third cavity 310 and contacts the lower wall surface of the third cavity 310.

By means of the arrangement, a certain accommodating space can be provided for the spring 400 by utilizing the third cavity 310 of the valve core 300, and the spring 400 is limited by utilizing the third cavity 310, so that the spring 400 is prevented from moving along the radial direction relative to the valve core 300, and the spring 400 is convenient to assemble and disassemble to the valve core 300.

In addition, a positioning groove is provided on the lower surface of the cover plate 600, and the upper end of the spring 400 can extend into the positioning groove and be abutted against the bottom surface of the positioning groove. By providing the positioning groove and the third cavity 310, opposite ends of the spring 400 are fixed to the cover plate 600 and the valve cartridge 300, respectively.

Further, the valve cartridge 300 is provided with an annular stepped groove. Specifically, an annular stepped groove is concavely formed on the inner circumferential surface of the third cavity 310 of the valve core 300, the central axis of the annular stepped groove extends along the first direction, the annular stepped groove and the third cavity 310 are coaxially disposed, and the annular stepped groove is disposed close to the valve cover 100, that is, the annular stepped groove is located at the upper portion of the valve core 300. The annular stepped groove is arranged, so that the puller can be conveniently used for clamping the annular stepped groove, and the valve core 300 can be quickly and easily taken out from the valve sleeve 200.

Further, the valve core 300 is provided with a screw hole. Specifically, the threaded hole is disposed in the wall surface of the third cavity 310 of the valve core 300, which is far away from the valve cover 100, and the threaded hole is disposed coaxially with the third cavity 310. The threaded hole is formed to facilitate screwing the threaded portion of the puller into the threaded hole of the valve core 300, fix the puller to the valve core 300, and pull the valve core 300 out of the valve housing 200 by repeated impact.

In the present embodiment, the valve cover 100 is provided with a first annular groove 120, and a central axis of the first annular groove 120 extends along a first direction of the valve cover 100 and is disposed coaxially with the first cavity 110 of the valve cover 100. The first annular groove 120 is located at an end surface of the cap 100 contacting the cap plate 600. A first seal is disposed within the first annular groove 120. Specifically, the upper end surface of the valve cover 100 is downwardly recessed to form a first annular groove 120, and an opening of the first annular groove 120 is upwardly opened so as to place the first sealing member in the first annular groove 120. The first seal is a first O-ring 510, which is a rubber seal.

It will be appreciated that when the cap 100 contacts the cover plate 600, the first sealing member may also contact the lower surface of the cover plate 600, and the first sealing member may seal the upper end surface of the cap 100.

The valve cover 100 is provided with a second annular groove 130, and a central axis of the second annular groove 130 extends along a first direction of the valve cover 100 and is disposed coaxially with the first cavity 110 of the valve cover 100. The second annular groove 130 is located at the outer circumferential surface of the valve cover 100. A second seal is disposed within the second annular groove 130. The second seal includes a second O-ring 520 and a first retainer ring 530. One for each of the first and second O-rings 530, 520, the second O-ring 520 is located between the valve sleeve 200 and the first retainer ring 530, i.e. the first retainer ring 530 is located closer to the cover plate 600 than the second O-ring 520.

It will be appreciated that when the bonnet 100 is installed within the mounting cavity 710 of the valve body 700, the second seal may contact the inner peripheral surface of the mounting cavity 710 and may provide an axial seal to the bonnet 100. Since the lower portion of the valve cover 100 is pressurized by the liquid to promote the valve cover 100 to move toward the cover plate 600, the second O-ring 520 and the first retainer ring 530 are simultaneously disposed in the second annular groove 130, the first retainer ring 530 can prevent the second O-ring 520 from being scratched by a gap, and the use pressure of the second O-ring is increased, and the first retainer ring 530 helps to maintain good lubrication of the second O-ring 520.

In this embodiment, the valve cover 100 is provided with a second step structure 150. Specifically, the middle part of the valve cover 100 is provided with a second groove, which is coaxially disposed with and communicated with the first cavity 110, and the inner diameter of the second groove is larger than the inner diameter of the first cavity 110 and smaller than the inner diameter of the first groove, so that the junction between the second groove and the first cavity 110 forms a second step structure 150. The second step structure 150 is located between the cover plate 600 and the first step structure 140, i.e., the second step structure 150 is disposed closer to the cover plate 600 than the first step structure 140. The second step structure 150 has an inner diameter smaller than that of the first step structure 140.

It can be appreciated that the arrangement of the second step structure 150 facilitates the operator to perform a clamping action on the second step structure 150 by means of the puller, so as to smoothly pull the valve cover 100 out of the installation cavity 710 of the valve body 700.

In the present embodiment, the valve sleeve 200 is provided with a third annular groove 240 and a fourth annular groove 250, the third annular groove 240 and the fourth annular groove 250 being located at opposite ends of the valve sleeve 200 in the first direction, respectively. Specifically, the outer circumferential surface of the upper portion of the valve housing 200 is concavely formed with a third annular groove 240, and a central axis of the third annular groove 240 extends along the first direction of the valve housing 200 and is disposed coaxially with the second cavity 210. The outer circumferential surface of the lower portion of the valve housing 200 is concavely formed with a fourth annular groove 250, and a central axis of the fourth annular groove 250 extends along the first direction of the valve housing 200 and is disposed coaxially with the second cavity 210.

Moreover, a third seal is disposed within third annular groove 240 and a third seal is also disposed within fourth annular groove 250. Specifically, the third seal includes a third O-ring 540 and a second retainer ring 550. Wherein the number of the third O-rings 540 is one, the number of the second check rings 550 is two, and the two second check rings 550 are respectively located at two opposite sides of the third O-rings 540 in the first direction.

It will be appreciated that when the valve sleeve 200 is in contact with the valve cap 100, the third seal within the third annular groove 240 will contact the inner peripheral surface of the third cavity 310 of the valve cap 100, which can provide an axial seal against the upper portion of the valve sleeve 200. When the valve housing 200 is disposed in the installation cavity 710 of the valve body 700, the third sealing member in the fourth annular groove 250 may contact the inner circumferential surface of the installation cavity 710, and the third sealing member may perform an axial sealing function on the lower portion of the valve housing 200. Since the valve housing 200 is pressurized at opposite sides in the first direction, the second check rings 550 are provided at opposite sides of the third O-ring 540, respectively, so that the working pressure of the third O-ring 540 can be greatly increased, and the third O-ring 540 can maintain good lubrication.

It should be noted that, in the floating two-way cartridge valve of the present embodiment, the cover plate 600 and the valve body 700 (also referred to as a valve block) may integrate control elements (including hydraulic control elements, electronic pressure sensors, displacement sensors, etc.) with different functions as required, so as to greatly improve control accuracy and achieve automatic and intelligent control requirements.

The floating two-way cartridge valve of the embodiment is mainly suitable for controlling the pressure, the flow and the direction in a high-pressure and large-flow system of oil hydraulic pressure and water hydraulic pressure, and can also be used for occasions such as quick filling, for example: metallurgical equipment (steel rolling, continuous casting, blast furnaces), metal forming equipment (aluminum profile extrusion press, oil press, hydraulic press, die casting machine), plastic forming equipment (injection molding machine, extruder), large-scale metal processing equipment and packer. The floating two-way cartridge valve of the embodiment can also be adopted in large and medium-sized hydraulic and hydraulic systems of ships, ports, engineering machinery, ocean engineering machinery and the like. Even the floating two-way cartridge valve of the embodiment can control high-pressure and large-flow water medium in shale gas exploitation equipment.

Particularly, as the floating two-way cartridge valve does not need an independent valve body 700, the ultra-high pressure (more than 70 MPa) is easy to realize, so that the requirement of modern hydraulic development is met to a great extent, and the floating two-way cartridge valve also has the potential capability of controlling fluid media in other industries.

While the preferred embodiment of the present utility model has been described in detail, the utility model is not limited to the embodiments, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the utility model, and these modifications and substitutions are intended to be included in the scope of the present utility model as defined in the appended claims.

Claims (10)

1. A floating two-way cartridge valve, comprising:

A cover plate;

The valve cover is positioned at one side of the cover plate in the first direction and is in contact with the cover plate, the valve cover is provided with a first cavity extending along the first direction, the first cavity penetrates through two opposite end surfaces of the valve cover, and a first step structure is arranged in the first cavity;

The valve sleeve is positioned on one side of the valve cover, which is far away from the cover plate, and is in contact with the first step structure, the valve sleeve is provided with a second cavity extending along a first direction, the second cavity penetrates through the end face of the valve sleeve, which is close to the valve cover, the valve sleeve is provided with a first opening and a second opening which are communicated with the second cavity, the central axis of the first opening is perpendicular to the central axis of the second opening, and the second opening is positioned on the end face of the valve sleeve, which is far away from the valve cover;

The valve core extends along the first direction, is arranged in the second cavity and can open and close the second opening;

And the spring extends along the first direction and is respectively contacted with the cover plate and the valve core.

2. The floating two-way cartridge valve of claim 1, wherein the valve core is provided with a third cavity extending along the first direction, the third cavity penetrates through the end face of the valve core, which is close to the valve cover, and one end of the spring extends into the third cavity and abuts against the wall surface of the third cavity.

3. The floating two-way cartridge valve of claim 2, wherein an annular stepped groove having a central axis extending in a first direction is provided in the third cavity, the annular stepped groove being disposed adjacent to the valve cover.

4. The floating two-way cartridge valve of claim 2 wherein the wall of the third cavity remote from the valve cover is provided with a threaded bore.

5. The floating two-way cartridge valve according to claim 1, wherein the valve cover is provided with a first annular groove and a second annular groove, the central axes of the first annular groove and the second annular groove extend along a first direction, the first annular groove is positioned on the end face of the valve cover, which is contacted with the cover plate, a first sealing element is arranged in the first annular groove, the second annular groove is positioned on the outer circumferential surface of the valve cover, and a second sealing element is arranged in the second annular groove.

6. The floating two-way cartridge valve of claim 5 wherein said first seal is a first O-ring.

7. The floating two-way cartridge valve of claim 5 wherein said second seal comprises a second O-ring and a first retainer ring, said second O-ring being located between said first retainer ring and said valve housing.

8. The floating two-way cartridge valve of claim 1, wherein a second step structure is disposed within the first cavity, the second step structure being located between the cover plate and the first step structure.

9. The floating two-way cartridge valve of claim 1, wherein the outer circumferential surface of the valve housing is provided with a third annular groove and a fourth annular groove, the central axes of which extend along the first direction, the third annular groove and the fourth annular groove are respectively positioned at opposite ends of the valve housing in the first direction, and third sealing elements are respectively arranged in the third annular groove and the fourth annular groove.

10. The floating two-way cartridge valve of claim 9 wherein said third seal member comprises a third O-ring and a second retainer ring, said second retainer ring being two, said second retainer rings being located on opposite sides of said third O-ring in a first direction.