CN220416332U

CN220416332U - One-way pressure control valve capable of preventing valve core from adhesion

Info

Publication number: CN220416332U
Application number: CN202321452698.1U
Authority: CN
Inventors: 高仰成
Original assignee: Ningbo Hengxinhe Precision Machinery Co ltd
Current assignee: Ningbo Hengxinhe Precision Machinery Co ltd
Priority date: 2023-06-08
Filing date: 2023-06-08
Publication date: 2024-01-30
Anticipated expiration: 2033-06-08

Abstract

The utility model provides a one-way pressure control valve for preventing valve core adhesion, and belongs to the technical field of valves. According to the valve, the telescopic sleeve is connected with the valve channel of the valve body through the internal thread, the abutting cylinder is connected with the internal thread of the telescopic sleeve, one end of the abutting cylinder extends out of the telescopic sleeve, the valve core is arranged out of one end of the abutting cylinder extending out of the telescopic sleeve, the auxiliary spring is arranged between the valve core and the telescopic sleeve, the main spring is arranged on one side of the valve core, which is away from the telescopic sleeve, of the valve core, the acting force of the auxiliary spring on the valve core is adjusted by screwing the telescopic sleeve, the acting force of the main spring is enabled to be larger than that of the auxiliary spring, the valve core is enabled to abut against the end part of the abutting cylinder, the normal unidirectional control requirement is met, the acting force of the auxiliary spring is enabled to be larger than that of the main spring, the valve core is enabled to be far away from the abutting cylinder, the problem that the valve core is adhered due to long-time pressing of the valve core on the abutting cylinder in the process of long-time non-use of storage and transportation is avoided, and the subsequent use performance is guaranteed.

Description

One-way pressure control valve capable of preventing valve core from adhesion

Technical Field

The utility model relates to the technical field of valves, in particular to a one-way pressure control valve for preventing valve core adhesion.

Background

The one-way pressure control valve is commonly called as a one-way valve, is a control member for realizing one-way circulation of a pipeline, can be used as a check valve, a pressure relief valve and other functional valves, and has wide application and market prospect.

Currently, the existing one-way pressure control valve on the market generally includes a one-way valve as in patent CN105864467B, which has a housing with an inner cavity, wherein the upper end and the lower end of the housing are respectively provided with a fluid outlet and a fluid inlet which are communicated with the inner cavity, a sealing body is movably arranged in the inner cavity, meanwhile, the sealing body is cooperatively provided with an elastic member, the elastic member provides fluid pressure against the fluid inlet for the sealing body, when fluid enters the inner cavity from the fluid, the fluid acts on the sealing body to push the sealing body to compress the elastic member, so that the sealing body moves, thereby realizing the conduction of a channel from the fluid inlet to the fluid outlet, meeting the fluid circulation requirement, and when the fluid flows reversely, the fluid also acts on the sealing body, at this time, the sealing body is blocked by the inner wall of the inner cavity and cannot move, thereby blocking the channel from the fluid outlet to the fluid inlet, namely restricting the reverse flow of the fluid. In addition, in order to promote sealed effect, generally set up the seal body into the structure that sets up the sealing pad on the sealed face on the metal main part, and the flexible material that has flexibility such as rubber is sealed to the sealing pad, although above-mentioned structure can realize sealing, the valve is installed in pipe-line system after accomplishing, and this process time is indeterminate, few months, many years even more, in this process, the elastic component of current one-way pressure control valve can provide elastic force all the time and make the seal body remain the state of compressing tightly on the wall body of inner chamber all the time, because the external environment influence such as oxidation, the problem of adhesion appears very easily to the seal body, influence subsequent performance.

Disclosure of Invention

In order to solve the above problems in the prior art, it is an object of the present utility model to provide a unidirectional pressure control valve capable of preventing adhesion of a valve core, in which a telescopic sleeve is disposed in a valve channel of a valve body, an abutting cylinder with one end extending out is disposed in the telescopic sleeve, and at the same time, the valve core is disposed in the valve channel and outside the end extending out of the abutting cylinder, and an auxiliary spring is disposed between the valve core and the telescopic sleeve, one side of the valve core, which is away from the leaning cylinder, is provided with a main spring, so that the auxiliary spring is controlled by the telescopic sleeve to lean against the acting force on the valve core, and the acting force of the auxiliary spring can be increased in the storage and conveying processes, so that the valve core can be away from the leaning cylinder, the problem that the valve core is adhered to and leans against the cylinder after a long time is avoided, and the subsequent use performance is ensured.

The specific technical scheme is as follows:

the utility model provides a prevent one-way pressure control valve of case adhesion, includes valve body, case and main spring, is provided with one on the valve body and runs through the valve way at its both ends, and the one end of valve way is the entry, and the other end of valve way is provided with the export, and the case slides and sets up in the valve way and be located between entry and the export, and main spring sets up in the case and deviates from the one side of entry and support and lean on the case, has such characteristic, still includes:

the telescopic sleeve is in threaded connection with one end of the inlet of the valve channel, and one end of the telescopic sleeve extends towards one side of the valve core;

the abutting cylinder is in threaded connection with the inside of the telescopic sleeve, and one end of the abutting cylinder extends out of the telescopic sleeve and selectively contacts or is far away from the valve core;

the auxiliary spring is sleeved on one end of the abutting cylinder extending out of the telescopic sleeve, one end of the auxiliary spring abuts against the telescopic sleeve, and the other end of the auxiliary spring abuts against the valve core; and, in addition, the processing unit,

the valve core comprises a main body and a sealing gasket, one side of the main body, which is away from the main spring, is close to one side of the abutting cylinder, a caulking groove is formed in the end face of one side of the main body, which is close to the abutting cylinder, the sealing gasket is embedded in the caulking groove, the auxiliary spring abuts against the main body, and the end part of the abutting cylinder is selectively contacted with or far away from the sealing gasket.

The one-way pressure control valve capable of preventing the valve core from being adhered comprises a valve channel, wherein the valve channel is a straight hole, one end of the valve channel, deviating from an inlet, is an adjusting port, an adjusting nut is connected with the adjusting port in an internal thread mode, one end of a main spring, deviating from the valve core, abuts against the adjusting nut, a plurality of inclined holes communicated with the valve channel are formed in the side wall of the valve body and located at one end of the adjusting port, and the inclined holes jointly form an outlet.

The unidirectional pressure control valve for preventing the valve core from adhering comprises a plurality of inclined holes, wherein ports at one end of each inclined hole communicated with the valve channel are distributed in an annular array with the axle center of the valve channel, a circle of concave annular diversion trenches are formed in the inner wall of the valve channel of the valve body, and the ports at one end of each inclined hole communicated with the valve channel are communicated with the diversion trenches.

The one-way pressure control valve capable of preventing the valve core from being adhered is characterized in that a first boss is arranged on one side of the main body, which is away from the abutting cylinder, and meanwhile, one side of the adjusting nut, which is close to the valve core, is arranged in a conical shape, one end of the main spring is fixedly sleeved on the first boss, and the other end of the main spring is sleeved on the conical shape of the adjusting nut.

The one-way pressure control valve for preventing the valve core from being adhered comprises an auxiliary spring, a valve body and a valve body, wherein the auxiliary spring is abutted against one end of the telescopic sleeve and is fixedly connected with the end part of the telescopic sleeve.

The one-way pressure control valve capable of preventing valve core adhesion comprises a first sealing structure arranged between the outer wall of a telescopic sleeve and the inner wall of a valve channel of a valve body, a second sealing structure arranged between the inner wall of the telescopic sleeve and the outer wall of an abutting cylinder, and sealing grooves and sealing rings, wherein the sealing grooves are arranged on the outer wall of the telescopic sleeve and the outer wall of the abutting cylinder, and the sealing rings are sleeved in each sealing groove.

The unidirectional pressure control valve capable of preventing the valve core from being adhered is characterized in that a first tool matching surface is arranged on the inner wall of an orifice of one end of the telescopic sleeve, which is close to the inlet, and a second tool matching surface is arranged on the inner wall of a cylinder opening, which is propped against one end of the cylinder and is away from the valve core, and the first tool matching surface and the second tool matching surface are both planes.

The unidirectional pressure control valve for preventing the valve core from adhering comprises a cylinder mouth, wherein the cylinder mouth is arranged in a flaring way and forms a step at the middle part in the cylinder, and the cylinder mouth is propped against one end of the cylinder, which is away from the valve core.

The unidirectional pressure control valve capable of preventing valve core adhesion comprises a cylinder, wherein a filter structure is arranged in the cylinder, the filter structure comprises a filter screen, a sealing ring and a clamping ring, the filter screen is transversely arranged in the middle part of the cylinder, one side of the edge of the filter screen is propped against a step, meanwhile, a circle of annular clamping groove is formed in the inner wall of the cylinder, which is positioned on one side, deviating from the step, of the filter screen, the clamping ring is clamped in the clamping groove and is tightly pressed on one side, deviating from the step, of the filter screen, and the sealing ring is arranged between the filter screen and the step or between the filter screen and the clamping ring.

The unidirectional pressure control valve for preventing the valve core from adhering is characterized in that a circle of annular convex edges are arranged on the end face of the abutting cylinder, which is close to one end of the valve core, and the cross section of the end face of the convex edge, which is close to one end of the valve core, is in circular arc arrangement.

The technical scheme has the positive effects that:

according to the unidirectional pressure control valve capable of preventing valve core adhesion, the telescopic sleeve is connected with the valve channel inner thread of the valve body, meanwhile, the abutting cylinder is connected with the inner thread of the telescopic sleeve, one end of the abutting cylinder stretches out of the telescopic sleeve, meanwhile, one end of the abutting cylinder, which stretches out of the telescopic sleeve, is sleeved with the auxiliary spring, one end of the auxiliary spring abuts against the telescopic sleeve, namely the size of acting force of the auxiliary spring on the valve core is realized by screwing the telescopic sleeve, the valve core can overcome acting force of the auxiliary spring under the action of the main spring and abut against the end part of the abutting cylinder, normal unidirectional control requirements are met, the valve core can overcome acting force of the main spring and keep away from the abutting cylinder, the problem that the valve core is adhered due to long-time pressing of the valve core against the cylinder in the process of long-time non-use of storage and transportation is avoided, and subsequent use performance is guaranteed.

Drawings

FIG. 1 is a block diagram of an embodiment of a one-way pressure control valve of the present utility model for preventing sticking of a valve spool in normal use;

fig. 2 is a block diagram of an embodiment of a one-way pressure control valve of the present utility model that prevents sticking of a spool when not in use for a long period of time.

In the accompanying drawings: 1. a valve body; 11. a valve passage; 12. an inclined hole; 13. a diversion trench; 111. an inlet; 112. an adjustment port; 113. an adjusting nut; 2. a valve core; 21. a main body; 22. a sealing gasket; 23. a first boss; 3. a main spring; 4. a telescopic sleeve; 41. a first tool mating surface; 5. an abutment cylinder; 51. a second tool mating surface; 52. a convex edge; 6. an auxiliary spring; 7. a first sealing structure; 8. a second sealing structure; 9. a filtering structure; 91. a filter screen; 92. a seal ring; 93. and a clasp.

Description of the embodiments

In order to make the technical means, the creation features, the achievement of the purposes and the effects of the present utility model easy to understand, the following embodiments specifically describe the technical solution provided by the present utility model with reference to fig. 1 to 2, but the following disclosure is not limited to the present utility model.

FIG. 1 is a block diagram of an embodiment of a one-way pressure control valve of the present utility model for preventing sticking of a valve spool in normal use; fig. 2 is a block diagram of an embodiment of a one-way pressure control valve of the present utility model that prevents sticking of a spool when not in use for a long period of time. As shown in fig. 1 and 2, the unidirectional pressure control valve for preventing adhesion of a valve core provided in this embodiment includes: the valve body 1, the valve core 2, the main spring 3, the telescopic sleeve 4, the abutting cylinder 5 and the auxiliary spring 6, at this moment, the valve body 1 is of a columnar structure, the valve body 1 is provided with a valve channel 11 with two ends penetrating, one end of the valve channel 11 is set to be an inlet 111, meanwhile, the other end of the valve channel 11, which is positioned on the valve body 1, is provided with an outlet, the valve core 2 is positioned in the valve channel 11 and between the inlet 111 and the outlet, one side of the valve core 2, which is far away from the inlet 111, is provided with the main spring 3, one end of the main spring 3 abuts against the valve core 2, so that the valve core 2 can close or open the valve channel 11, fluid flows unidirectionally from the inlet 111 to the outlet, and the use requirement of a traditional unidirectional valve on the market is met. In addition, the telescopic sleeve 4, the abutting cylinder 5 and the auxiliary spring 6 are further arranged in the valve channel 11 of the valve body 1, so that the valve core 2 can be far away from the abutting cylinder 5 through the telescopic sleeve 4, the abutting cylinder 5 and the auxiliary spring 6 when the valve core 2 is not installed and is in a storage and transportation process, and is in a state of being suspended in the valve channel 11, the problem that the valve core 2 is adhered due to long-term compression in the storage and transportation process is avoided, and the subsequent use performance is ensured.

Specifically, the telescopic sleeve 4 is in threaded connection with one end of the inlet 111 of the valve channel 11, at this time, a first annular bulge is arranged on the inner wall of the valve channel 11, an internal thread is arranged on the first annular bulge, and an external thread is arranged on the outer wall of the telescopic sleeve 4, so that the threaded connection of the telescopic sleeve 4 in the valve channel 11 of the valve body 1 is realized, and the position of the telescopic sleeve 4 in the valve channel 11 can be adjusted by screwing the telescopic sleeve 4, thereby providing conditions for the subsequent compression of the auxiliary spring 6 or the release of the auxiliary spring 6. And, the one end of flexible cover 4 extends towards case 2 one side, for can support the auxiliary spring 6 that leans on case 2 for the follow-up provides and supports the foundation, and structural arrangement is more reasonable.

Specifically, will support and lean on section of thick bamboo 5 threaded connection in flexible cover 4, at this moment, be provided with the second annular on the cover inner wall of flexible cover 4 and draw, be provided with the internal thread on the second annular arch equally, and be provided with the external screw thread on the outer wall of support and lean on section of thick bamboo 5, realized supporting the threaded connection of section of thick bamboo 5 in flexible cover 4, make the user can support and lean on section of thick bamboo 5 and realize supporting the regulation of section of thick bamboo 5 in flexible cover 4 through twisting and lean on section of thick bamboo 5, for the follow-up ability after flexible cover 4 moves towards the one side that keeps away from case 2, still can keep supporting the positional relationship who leans on section of thick bamboo 5 and case 2 unchanged, thereby pressure when having guaranteed the valve unidirectional current is unchangeable, the structure is more nimble. And, one end of the abutting cylinder 5 extends to the outside of the telescopic sleeve 4 and selectively contacts or is far away from the valve core 2, and during normal installation and use, the end of the abutting cylinder 5 is used as a flow blocking edge in the valve channel 11 to be matched with the valve core 2, when the valve core 2 contacts the end of the abutting cylinder 5, the blocking of the valve channel 11 is realized, and when the valve core 2 is far away from the end of the abutting cylinder 5, the conduction of the valve channel 11 is realized. In addition, it should be noted that when not installed and during storage or transportation, the valve core 2 is also far away from the end of the abutting cylinder 5, so that the problem that the valve core 2 is stuck when pressed against the end of the abutting cylinder 5 under the action of the main spring 3 for a long time is prevented, and the service performance is ensured.

Specifically, the auxiliary spring 6 is sleeved on one end of the supporting cylinder 5 extending out of the telescopic sleeve 4, namely, one end of the supporting cylinder 5 extending out of the telescopic sleeve 4 provides deformation guiding for the auxiliary spring 6, so that the installation stability of the auxiliary spring 6 is improved. Meanwhile, one end of the auxiliary spring 6 is propped against the telescopic sleeve 4, the other end of the auxiliary spring 6 is propped against the valve core 2, namely, the auxiliary spring 6 acts on one side of the valve core 2 deviating from the main spring 3, so that the auxiliary spring 6 and the main spring 3 can jointly support the valve core 2, when the telescopic sleeve 4 is moved to enable the acting force of the auxiliary spring 6 on the valve core 2 to be larger than the acting force of the main spring 3, the valve core 2 can move towards one side far away from the leaning cylinder 5, so that the valve core 2 is far away from the leaning cylinder 5, the problem of adhesion of the valve core 2 is avoided, and when the telescopic sleeve 4 is moved to enable the acting force of the auxiliary spring 6 on the valve core 2 to be smaller than the acting force of the main spring 3, the main spring 3 pushes the valve core 2 towards one side leaning cylinder 5 and enables the valve core 2 to be tightly pressed on the end part of the leaning cylinder 5, so that the use requirement of the existing one-way valve is met. It is worth to point out that when preventing case 2 adhesion, auxiliary spring 6 and main spring 3 act on case 2 together and are located the both sides of case 2 respectively, can make case 2 hang in valve way 11 and receive auxiliary spring 6 and main spring 3's support and restriction, can prevent case 2 adhesion problem, can prevent case 2 and remove at will in valve way 11 and appear the problem of collision damage again, structural design is more reasonable.

In addition, the valve core 2 used in cooperation includes a main body 21 and a sealing pad 22, preferably, the main body 21 is of a hard structure, such as hard metal, at this time, one side of the main body 21 facing away from the main spring 3 is set to be close to one side of the abutting cylinder 5, an embedded groove is formed on the end surface of one side of the main body 21 close to the abutting cylinder 5, and the sealing pad 22 is embedded in the embedded groove, namely, the sealing performance of the valve core 2 when contacting with the end part of the abutting cylinder 5 is improved through a sealing ring installed in the embedded groove, and the service performance of the poppet valve is improved. And, the auxiliary spring 6 is propped against the main body 21 at one end of the valve core 2, so that the problem that the auxiliary spring 6 is propped against the sealing gasket 22 to cause deformation of the sealing gasket 22 is avoided, and likewise, the end of the propping cylinder 5 is only contacted with or separated from the sealing gasket 22 when selectively contacting or separating from the valve core 2, namely, the auxiliary spring 6 is propped against the main body 21 with higher hardness, and a sealing ring with elasticity is selected when sealing, so that the structural design is more reasonable.

More specifically, the valve channel 11 in the valve body 1 is a straight hole, at this time, one end of the valve channel 11 away from the inlet 111 is an adjusting port 112, that is, one end of the valve channel 11 is the inlet 111, and the other end is the adjusting port 112, and the inlet 111 is opposite to the adjusting port 112, so that the valve core 2 and the main spring 3 are conveniently installed in the valve channel 11. Meanwhile, an adjusting nut 113 is connected to the adjusting port 112 in a threaded manner, at this time, one end of the main spring 3 deviating from the valve core 2 is propped against the adjusting nut 113, namely, a propping base is provided for the installation of the main spring 3 in the valve channel 11 through the adjusting nut 113, and the acting force of the main spring 3 applied to the valve core 2 can be adjusted by screwing the adjusting nut 113, so that the use requirements of different opening pressures are met, and meanwhile, the replacement of the valve core 2 and the main spring 3 of a wearing part can be conveniently realized under the condition that the adjusting nut 113 is unscrewed. In addition, a plurality of inclined holes 12 communicating with the valve passage 11 are formed in the side wall of the valve body 1 at one end of the regulating port 112, and the plurality of inclined holes 12 together form an outlet, that is, after the fluid enters the valve passage 11 from the inlet 111, the fluid flows out of the plurality of inclined holes 12, that is, flows out of the outlet when the valve body 2 opens the valve passage 11.

More specifically, the ports at one end of the valve channel 11 are distributed in an annular array with the axis of the valve channel 11, so that the ports at one end of the valve channel 11 are located on the same annular shape in the valve channel 11, meanwhile, a circle of concave annular diversion trenches 13 are formed in the inner wall of the valve channel 11 of the valve body 1, at the moment, the diversion trenches 13 correspond to the same annular shape at which the ports at one end of the valve channel 11 are located, which are communicated with the plurality of the inclined holes 12, and the ports at one end of the valve channel 11 are communicated with the diversion trenches 13, namely, fluid entering the valve channel 11 can enter the diversion trenches 13 through the diversion trenches 13, and flows into the inclined holes 12 with different flow directions uniformly through the diversion trenches 13, so that the flow and the pressure of the fluid flowing out of each inclined hole 12 are the same, and the structural design is more reasonable.

More specifically, be provided with first boss 23 in main part 21 one side that deviates from to lean on section of thick bamboo 5, simultaneously, be conical arrangement with the one side that adjusting nut 113 is close to case 2, when main spring 3 installs between case 2 and adjusting nut 113, the fixed cover of one end of main spring 3 is located on first boss 23, the conical on adjusting nut 113 is located to the other end cover, be the one end that conical arrangement is through first sand grip and adjusting nut 113 promptly and carry out spacingly to the both ends of main spring 3, the problem that main spring 3 shifted in the use has been prevented, thereby the stability of case 2 installation and motion has been guaranteed.

More specifically, the auxiliary spring 6 is propped against one end on the telescopic sleeve 4 and is fixedly connected with the end part of the telescopic sleeve 4, preferably, the end part of the auxiliary spring 6 is welded and connected with the end part of the telescopic sleeve 4, so that the auxiliary spring 6 can move in the valve channel 11 along with the telescopic sleeve 4, namely, when the valve is normally used, the auxiliary spring 6 can move along with the telescopic sleeve 4 towards one side of the inlet 111 and is thoroughly separated from the valve core 2, namely, the valve core 2 is only subjected to the acting force of the main spring 3 at the moment, the interference of other structures on the action pressure of the valve core 2 is avoided, and the structural design is more reasonable.

More specifically, a first sealing structure 7 is further arranged between the outer wall of the telescopic sleeve 4 and the inner wall of the valve channel 11 of the valve body 1, and likewise, a second sealing structure 8 is further arranged between the inner wall of the telescopic sleeve 4 and the outer wall of the abutting cylinder 5, so that leakage of fluid from an assembly gap between the telescopic sleeve 4 and the valve body 1 and an assembly gap between the telescopic sleeve 4 and the abutting cylinder 5 is avoided through the first sealing structure 7 and the second sealing structure 8, and the sealing performance is better. And, first seal structure 7 and second seal structure 8 all include seal groove and sealing washer, at this moment, set up the seal groove on the outer wall of flexible cover 4 and support the outer wall of a section of thick bamboo 5 to all overlap in each seal groove and be equipped with the sealing washer, maintained the sealing washer and had rolled out the position stability on flexible cover 4 and support a section of thick bamboo 5, prevented to adjust flexible cover 4 and support the problem that the sealing washer drops when a section of thick bamboo 5.

More specifically, the inner wall of the orifice of the telescopic sleeve 4 near the inlet 111 is provided with a first tool matching surface 41, and meanwhile, the inner wall of the cylinder opening of the end, which is far away from the valve core 2, of the abutting cylinder 5 is provided with a second tool matching surface 51, preferably, the first tool matching surface 41 and the second tool matching surface 51 are both planes, and the first tool matching surface 41 and the second tool matching surface 51 comprise two parallel planes, similar to two opposite planes in the inner hexagonal hole, so that when the telescopic sleeve 4 needs to be screwed or the abutting cylinder 5 rotates subsequently, the telescopic sleeve 4 can be inserted into the telescopic sleeve 4 or the abutting cylinder 5 by means of a rod with two symmetrical planes, and the rod can be screwed and the abutting cylinder 5 rotates by limiting the first tool matching surface or the second tool matching surface 51, so that the adjustment is more convenient.

More specifically, the nozzle at one end of the abutting cylinder 5 deviating from the valve core 2 is arranged in a flaring manner, the flow rate of fluid flowing in when the fluid passes through the abutting cylinder 5 is increased through the nozzle arranged in the flaring manner, the problem that the flow rate is influenced by the inflow side of the abutting cylinder 5 is avoided, the flow rate is only influenced by the opening and closing state of the valve core 2, and the service performance is ensured. And, the nozzle that is the flaring and arranges forms the step in the section of thick bamboo middle part, provides the reference of leaning on for the arrangement of follow-up filtration 9.

More specifically, the filter structure 9 is further disposed in the abutting cylinder 5, at this time, the filter structure 9 further includes a filter screen 91, a sealing ring 92 and a snap ring 93, and the filter screen 91 is transversely disposed in the middle part of the abutting cylinder 5, so that the fluid flowing through the abutting cylinder 5 can pass through the filter screen 91, and the filter screen 91 can completely filter the fluid. And, one side at the border of filter screen 91 supports and leans on the step, simultaneously, support and lean on the section of thick bamboo inner wall of section of thick bamboo 5 and lie in the filter screen 91 and deviate from one side of step and seted up round annular draw-in groove, snap ring 93 card is located the draw-in groove and is compressed tightly in the filter screen 91 one side that deviates from the step, realize compressing tightly filter screen 91 promptly through going into the draw-in groove with snap ring 93 card, not only simple structure, convenient assembling can realize compressing tightly fast to filter screen 91 moreover, has prevented the problem that filter screen 91 drops in the use. Meanwhile, a sealing ring 92 is further arranged between the filter screen 91 and the step or between the filter screen 91 and the clamping ring 93, and the sealing performance is better due to the sealing ring 92, so that the problem that fluid leaks from an assembly gap between the filter screen 91 and the inner wall of the cylinder abutting against the cylinder 5 is prevented.

More specifically, a ring-shaped protruding edge 52 is further arranged on the end face of the abutting cylinder 5, which is close to one end of the valve core 2, and sealing is achieved by abutting the protruding edge 52 on the valve core 2. And, the cross section of the end face of the annular protruding edge 52 close to one end of the valve core 2 is in circular arc arrangement, so that the end face of one end, where the protruding edge 52 abuts against the valve core 2, can be smoothly rounded, and when abutting against the valve core 2, the valve core 2 can be tightly attached, the sealing effect is better, meanwhile, the damage to the sealing gasket 22 can be prevented, and the structural design is more reasonable.

The unidirectional pressure control valve for preventing the valve core from adhering comprises a valve body 1, a valve core 2, a main spring 3, a telescopic sleeve 4, an abutting cylinder 5 and an auxiliary spring 6; through the valve way 11 internal thread at valve body 1 has flexible cover 4 to there is support to lean on section of thick bamboo 5 in flexible cover 4 internal thread connection, and, support to lean on the one end of section of thick bamboo 5 to stretch out to flexible cover 4 outside, case 2 sets up to lean on outside the one end of section of thick bamboo 5 stretching out flexible cover 4 outside, and be provided with auxiliary spring 6 between case 2 and the flexible cover 4, one side that case 2 deviates from flexible cover 4 is provided with main spring 3, follow-up through twisting flexible cover 4 in order to adjust the effort size that auxiliary spring 6 acted on case 2, can make under the effect of main spring 3 be greater than auxiliary spring 6 and make case 2 support to lean on the tip of section of thick bamboo 5, satisfy normal unidirectional control demand, can also make auxiliary spring 6 effort be greater than main spring 3 and make case 2 keep away from support to lean on section of thick bamboo 5, avoided in long-time non-use in storage and transportation in-process case 2 because of compressing tightly on support to lean on section of thick bamboo 5 for a long time and lead to the problem of case 2 adhesion, follow-up performance has been guaranteed.

The foregoing is merely illustrative of the preferred embodiments of the present utility model and is not intended to limit the embodiments and scope of the present utility model, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present utility model, and are intended to be included in the scope of the present utility model.

Claims

1. The utility model provides a prevent one-way pressure control valve of case adhesion, includes valve body, case and main spring, be provided with one on the valve body and run through the valve way at its both ends, the one end of valve way is the entry, the other end of valve way is provided with the export, the case slide set up in the valve is said and be located the entry with between the export, main spring set up in the case deviate from one side of entry and support against on the case, its characterized in that still includes:

the valve core comprises a main body and a sealing gasket, one side, deviating from the main spring, of the main body is close to one side of the supporting cylinder, a caulking groove is formed in the end face, close to one side of the supporting cylinder, of the main body, the sealing gasket is embedded in the caulking groove, the auxiliary spring is propped against the main body, and the end portion, propped against the cylinder, is selectively contacted with or kept away from the sealing gasket.

2. The unidirectional pressure control valve for preventing valve core adhesion according to claim 1, wherein the valve channel is a straight hole, one end of the valve channel, which is away from the inlet, is an adjusting port, an adjusting nut is connected in the adjusting port in a threaded manner, one end of the main spring, which is away from the valve core, is propped against the adjusting nut, a plurality of inclined holes communicated with the valve channel are formed in the side wall of the valve body and positioned at one end of the adjusting port, and the plurality of inclined holes jointly form the outlet.

3. The unidirectional pressure control valve for preventing valve core adhesion according to claim 2, wherein a plurality of ports of the inclined holes communicated with one end of the valve channel are distributed in an annular array with the axle center of the valve channel, meanwhile, a circle of concave annular diversion trenches are formed in the inner wall of the valve channel of the valve body, and each port of the inclined holes communicated with one end of the valve channel is communicated with the diversion trench.

4. The unidirectional pressure control valve for preventing adhesion of a valve core according to claim 2, wherein a first boss is arranged on one side of the main body, which is away from the abutting cylinder, and meanwhile, one side of the adjusting nut, which is close to the valve core, is arranged in a conical shape, one end of the main spring is fixedly sleeved on the first boss, and the other end of the main spring is sleeved on the conical shape of the adjusting nut.

5. The valve cartridge adhesion preventing one-way pressure control valve of claim 1, wherein an end of the auxiliary spring abutting against the telescoping sleeve is fixedly connected with an end of the telescoping sleeve.

6. The unidirectional pressure control valve of claim 1, wherein a first sealing structure is arranged between the outer wall of the telescopic sleeve and the inner wall of the valve channel of the valve body, a second sealing structure is arranged between the inner wall of the telescopic sleeve and the outer wall of the abutting cylinder, the first sealing structure and the second sealing structure both comprise sealing grooves and sealing rings, the sealing grooves are arranged on the outer wall of the telescopic sleeve and the outer wall of the abutting cylinder, and the sealing rings are sleeved in each sealing groove.

7. The unidirectional pressure control valve of claim 1, wherein a first tool mating surface is disposed on an inner wall of the orifice of the telescoping sleeve adjacent to the inlet, and a second tool mating surface is disposed on an inner wall of the barrel opening of the end of the abutment barrel facing away from the valve element, and the first tool mating surface and the second tool mating surface are both planar.

8. The valve as claimed in claim 1, wherein the port of the abutting cylinder facing away from the valve core is formed in a flared arrangement and a step is formed in a middle portion of the cylinder.

9. The unidirectional pressure control valve for preventing adhesion of a valve core according to claim 8, wherein a filter structure is arranged in the abutting cylinder, the filter structure comprises a filter screen, a sealing ring and a clamping ring, the filter screen is transversely arranged at the middle part in the abutting cylinder, one side of the edge of the filter screen abuts against the step, meanwhile, a circle of annular clamping groove is formed in the inner wall of the abutting cylinder and positioned at one side of the filter screen away from the step, the clamping ring is clamped in the clamping groove and is tightly pressed at one side of the filter screen away from the step, and meanwhile, the sealing ring is arranged between the filter screen and the step or between the filter screen and the clamping ring.

10. The unidirectional pressure control valve of claim 1, wherein a ring-shaped protruding edge is arranged on the end face of the abutting cylinder, which is close to one end of the valve core, and the cross section of the end face of the protruding edge, which is close to one end of the valve core, is circular arc-shaped.