CN212338314U - Valve core and pressure control valve - Google Patents

Abstract

The utility model provides a case and pressure control valve belongs to valve technical field. It has solved the inconvenient scheduling problem of current case equipment. This case, including the valve core case, the valve opening has been seted up on the valve core case, wear to be equipped with the valve rod in the valve opening, the top of valve rod is supported and is leaned on there being the spring, convex cooperation ring has on the lateral surface of valve rod, the valve opening includes sliding hole section and fixed orifices section, and the aperture of fixed orifices section is greater than the aperture of sliding hole section, fixed orifices section fit in is fixed with fixed cylinder, fixed cylinder can be followed the top drill way of valve opening and is installed in the fixed orifices section, convex spacing portion has on the hole wall of valve opening, cooperation ring axial is spacing between fixed cylinder and spacing portion, the regulation hole has in the fixed cylinder, regulation hole female connection has the regulating part, insert in the regulation hole and support on the regulating part at the top of spring, spring and regulating part homoenergetic are installed in the regulation hole from the top drill way. The assembly process of this case is convenient and fast.

Description

Valve core and pressure control valve

Technical Field

The utility model belongs to the technical field of the valve, a case and pressure control valve are related to.

Background

The control valve refers to a valve in which a shutter is intended to be used at any position of closing and full opening, and a passage sectional area is changed by actuating the shutter to adjust a flow rate, a pressure, or a temperature, wherein the control valve mainly used for controlling the pressure is called a pressure control valve. The pressure control valve is arranged in a cold and hot water system, is mainly arranged at a cold water inlet end before or after entering a house and is used for protecting the stable operation of back-end system equipment.

Chinese patent literature discloses a pressure reducing valve [ application number: CN 201620879587.2; the notice number is: CN 205896308U ], including the valve rod, have the valve body in intake antrum and play water cavity, have the disk seat that communicates intake antrum and play water cavity in the valve body, the inner of valve rod passes the disk seat and this inner circumference links firmly sealed the pad, the outer end of valve rod stretches out the valve body setting and valve body threaded connection has the valve cap of establishing the valve rod outer end cover, be equipped with between valve cap and the valve rod and provide elasticity and make sealed the spring that has the trend of breaking away from the disk seat, still have the regulation structure of adjusting spring elasticity between valve cap and the valve rod. The adjusting structure includes set screw, the nut, locating pin and position circle, set screw passes valve cap top setting and set screw has radial protrusion and takes in the inboard scrap (bridge) in valve cap top, position circle and valve cap threaded connection, the locating pin is parallel with the valve rod and links firmly on the position circle, the nut is located the valve cap and with set screw threaded connection, the locating pin passes the nut setting, the pot head of spring is on set screw and is contradicted in the nut, the one end of spring is contradicted in the valve rod, valve rod outer end axial forms the mounting hole that supplies the spring to stretch into. The valve body is in threaded connection with a guide sleeve which is positioned in the valve cap and sleeved on the periphery of the valve rod, a cylindrical filter screen is arranged between the guide sleeve and the valve seat, the top of the filter screen is sleeved on the guide sleeve, and the bottom of the filter screen is supported by the valve seat. The valve body has the regulation pole with the coaxial setting of valve rod in the inner axis extending direction threaded connection of valve rod, and the inner of adjusting the pole supplies the inner of valve rod to contradict, and the valve body setting is stretched out to the outer end of adjusting the pole, and the regulation pole has axial limiting displacement to the valve rod.

The valve core is a component consisting of a valve rod, a sealing gasket, a valve seat, a guide sleeve, a valve cap, a spring, a positioning pin, a positioning ring, a nut, a positioning screw and a filter screen. When the valve core needs to be assembled, the positioning pin is fixed on the positioning ring, the nut is connected to the positioning screw in a threaded mode, the positioning pin is inserted into the nut, the positioning screw and the positioning ring are installed in the valve cap, the head of the positioning screw penetrates out of the top of the valve cap, and the positioning ring is connected to the valve cap in a threaded mode; then, sleeving the filter screen on the guide sleeve, placing the valve seat at the bottom of the filter screen, inserting the valve rod into the guide sleeve to enable the bottom end of the valve rod to extend out of the valve seat, fixing the sealing gasket on the valve rod, installing the valve rod, the valve seat and the guide sleeve on the valve body, and then placing the spring into an installation hole of the valve rod; then close the valve cap on the valve body, the top suit of spring is on set screw, the bottom and the valve body threaded connection of valve cap. When the valve core is required to be detached to clean the filter screen, the valve cap is detached from the valve body, then the spring, the guide sleeve, the filter screen, the valve seat and the valve rod are detached from the valve body, the spring, the guide sleeve, the filter screen, the valve seat and the valve rod are installed in the valve body according to the assembling steps after the valve core is cleaned, and then the valve cap is fixed on the valve body.

In the in-process of equipment case, the top of spring need the suit on set screw and support and lean on the nut, rotate set screw like this and just can come the elasticity of regulating spring through the ascending removal of nut in the axial, but because set screw is located the inside of valve cap and is not convenient for observe, and all have great space between position circle and the spring and between locating pin and the spring, consequently closing the in-process on the valve body with the valve cap lid, set screw's bottom face supports to lean on the top face of spring very easily, thereby lead to the spring can not produce with the nut and support and lean on, cause valve pressure regulation function to become invalid. In order to avoid that the spring cannot be sleeved on the positioning screw, the common mode is to adjust the installation sequence, the spring can be sleeved on the positioning screw firstly, then the valve cap and the valve body are combined to enable the bottom of the spring to be inserted into the installation hole of the valve rod, because the spring and the positioning screw are not in a fixed relation, the bottom of the spring needs to be kept upward to avoid the spring from falling out, the valve body needs to be inverted, the weight of the valve body is heavy, the labor intensity can be increased, the valve rod can easily slide out after the valve body is inverted, and the operation cannot be carried out well in actual operation. In addition, after the valve core is detached from the valve body and the filter screen is cleaned, when the valve core needs to be installed on the valve body again, the positioning screw and the spring still need to be positioned, the valve body is installed on a pipeline and cannot move, at the moment, the spring can only be placed in the installation hole of the valve rod, then the valve cap is covered on the valve body, the assembly position between the positioning screw and the spring still easily makes mistakes, and repeated reworking and adjustment are needed, so that the valve core is inconvenient to assemble.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a case and pressure control valve, solved the inconvenient technical problem of current case equipment.

The purpose of the utility model can be realized by the following technical proposal:

a valve core comprises a valve core seat, a valve hole is formed in the valve core seat, a valve rod penetrates through the valve hole, the top of the valve rod is abutted against a spring, a convex matching ring is arranged on the outer side surface of the valve rod, the valve hole comprises a sliding hole section in sliding fit with the matching ring, the valve core is characterized in that the valve hole further comprises a fixed hole section positioned above the top of the sliding hole section, the aperture of the fixed hole section is larger than that of the sliding hole section, a fixed cylinder is fixed in the fixed hole section in a matching mode and can be installed in the fixed hole section from a top end orifice of the valve hole, a convex limiting part is arranged below the bottom of the sliding hole section on the hole wall surface of the valve hole, the matching ring is axially limited between the fixed cylinder and the limiting part, an adjusting hole is formed in the fixed cylinder, an adjusting piece is connected with an adjusting piece in an internal thread, the top of the spring is inserted into the adjusting hole and abutted against, the spring and the adjusting piece can be installed in the adjusting hole from the top end hole of the adjusting hole.

During the equipment case, because can follow the top drill way of valve hole with the fixed cylinder that the fixed hole section cooperation is fixed and install the fixed hole section in, and the aperture of fixed hole section is greater than the aperture of sliding hole section, the cooperation ring with sliding hole section sliding fit also can follow the top drill way of valve hole and insert and can pass through the fixed hole section like this, and the cooperation ring protrusion setting on the lateral surface of valve rod, the biggest department of external diameter on the cooperation ring is the valve rod promptly, consequently can insert the valve hole with the valve rod from the top drill way of valve hole earlier, the cooperation ring passes through behind the fixed hole section with sliding hole end sliding fit, and the cooperation ring is blocked by spacing portion, make the valve rod hang in the valve hole. Because spring and regulating part homoenergetic are installed in the regulating hole from the top port opening of regulating hole, consequently fix the fixed cylinder at the valve opening of valve core seat and install spring and regulating part again earlier, can not influence the installation of spring and regulating part, and the fixed cylinder can be installed in the fixed orifices section from the top port opening of valve opening, so insert the valve stem back in the valve opening, can insert the fixed cylinder in the valve opening from the top port opening department of valve opening, make the fixed cylinder form the cooperation and fix with the fixed orifices section, the top of cooperation ring is blocked by the fixed cylinder after the fixed cylinder is fixed, the cooperation ring is by spacing portion and fixed cylinder axial spacing back, the valve stem can not fall out from the valve core seat, make the valve core seat, the valve stem is fixed as an organic whole with the fixed cylinder, so can also make things convenient for the equipment of follow-up spring and regulating part. After the fixed cylinder is fixed, the spring can be inserted into the adjusting hole from the top orifice of the adjusting hole, the bottom end of the spring is attached to the top of the valve rod, the top of the spring is located in the adjusting hole at the moment, the spring is not stressed and is in a natural extension state, then the adjusting piece is screwed into the adjusting hole from the top orifice of the adjusting hole, and the top end of the spring naturally abuts against the adjusting piece. Because regulating part threaded connection just can make regulating part axial displacement in the adjusting hole through rotating the regulating part, realizes the regulation of spring pressure, because the top of spring can be natural when the equipment regulating part supports and leans on the regulating part, just so can not appear spring pressure and can not adjust and need constantly rework the condition emergence. Therefore, when the valve core is assembled, the valve rod is inserted into the valve hole, then the fixing barrel is fixed into the valve hole, then the spring is inserted into the adjusting hole, and finally the adjusting piece is screwed into the adjusting hole, and the adjusting piece is installed once without reworking, so that the assembling process of the valve core is convenient and rapid.

In addition, the valve core structure can be separated from the valve body to be assembled to form an integrated valve core, and then the integrated valve core is installed on the valve body, so that the valve core is convenient to assemble on the valve body. When the valve core needs to be detached from the valve body for cleaning in the using process, the integrated valve core can be detached from the valve body for cleaning, and then the integrated valve core is assembled back, so that the valve core can be quickly and conveniently disassembled and assembled on the valve body. Moreover, after the valve core is assembled and integrated, the modular production of the valve core can be realized in a factory, so that the valve core is conveniently assembled on the valve body, and the production efficiency can be improved.

In the above valve element, a step surface is provided between the sliding hole section and the fixed hole section on the hole wall surface of the valve hole, and the bottom end surface of the fixed cylinder abuts against the step surface. The step surface has an axial positioning effect, so that the fixed cylinder is conveniently positioned and installed in the valve hole, and the valve core is convenient to assemble.

In the valve core, the wall surface of the adjusting hole is provided with a retaining shoulder, the top of the valve rod is inserted into the adjusting hole and can abut against the retaining shoulder, the outer side surface of the top of the matching ring is fixed with a sealing ring, and the sealing ring abuts against the wall surface of the adjusting hole and forms sealing.

The sealing ring is positioned at the top of the matching ring and is sealed with the fixed cylinder, so that the resistance generated when the matching ring is arranged in the sliding hole section can be reduced, the valve rod is convenient to install, and the valve core is convenient to assemble. In addition, because the valve core seat and the fixed cylinder are fixed in a split mode, different materials can be adopted between the valve core seat and the fixed cylinder, when the friction coefficient between the valve core seat and the sealing ring is large, and the friction coefficient between the fixed cylinder and the sealing ring is small, the sealing ring and the fixed cylinder form sealing, so that the resistance of the valve rod when the valve rod slides in the valve hole is small, the sliding is smoother, the sensitivity of the valve core is ensured, and the sealing ring can smoothly form sealing with the fixed cylinder under the condition of small resistance when the fixed cylinder is assembled.

In the valve core, the outer side surface of the fixed cylinder is provided with a convex fixed ring, the fixed ring is in threaded connection with the fixed hole section, and the outer side surface of the top of the fixed cylinder is provided with a wrench fixed part. Through solid fixed ring and fixed orifices section threaded connection, reducible thread length reduces the resistance with fixed section of thick bamboo screw in to the valve opening in, makes the convenient laborsaving of case equipment. The wrench fixing part can be in a spline structure or a regular hexagon structure and the like, and the wrench is provided with a structure which is correspondingly matched with the wrench fixing part and used for fixing. Set up the spanner fixed part and can facilitate the use spanner and twist the valve opening with fixed section of thick bamboo in, be favorable to making the case equipment convenient.

In the valve core, the valve hole further comprises a flaring section positioned at the top end of the valve hole, and the aperture of the flaring section is larger than that of the fixed hole section; or the top of the fixed hole section penetrates through the top end face of the valve core seat. The valve rod and the fixed cylinder can be ensured to enter the valve hole through the top orifice of the valve hole by the arrangement, so that the valve rod and the fixed cylinder are convenient to install, and the valve core is convenient to assemble.

In the above valve core, the wall surface of the adjusting hole is provided with an internal thread in threaded connection with the adjusting part, one end of the internal thread extends to the top end surface of the fixed cylinder, the spring is a cylindrical spring, and the outer diameter of the spring is smaller than the inner diameter of the internal thread. Therefore, the spring and the adjusting piece can be ensured to be inserted into the adjusting hole through the top end orifice of the adjusting hole, and the valve core is convenient to assemble.

In the valve core, a blind hole is formed in the top end face of the valve rod, the aperture of the blind hole is larger than the inner diameter of the internal thread, a first protruding positioning convex column is arranged on the bottom face of the blind hole, the bottom of the spring is located in the blind hole and sleeved on the first positioning convex column, a second protruding positioning convex column is arranged on the bottom end face of the adjusting piece, and the top of the spring is sleeved on the second positioning convex column.

When the spring is installed, the spring is inserted into the adjusting hole from the top end hole opening of the adjusting hole, the bottom of the spring enters the blind hole and is sleeved on the first positioning convex column, then the valve rod abuts against the fixed cylinder, the adjusting hole can extend out of the top of the spring, the second positioning convex column is inserted into the top of the spring, and then the adjusting piece presses the spring and is installed in the adjusting hole. The bore diameter of the blind hole is larger than the inner diameter of the internal thread, so that the spring can be conveniently inserted into the blind hole. In order to prevent the bottom end of the spring from being smoothly sleeved on the first positioning convex column in the installation process, a straight positioning rod can be inserted into the spring, then the spring and the straight positioning rod are inserted into the adjusting hole together, the straight positioning rod is taken out after the spring is installed, the straight positioning rod has a positioning effect, and the spring can be prevented from being biased in the installation process. The first positioning convex column and the second positioning convex column have positioning function, so that the spring is stable in position in the expansion process, the elasticity of the spring keeps accuracy in the working process of the valve core, the valve core works stably and accurately, and the spring can be prevented from vibrating to generate noise.

In the above valve element, a chamfer is provided on the hole wall surface of the valve hole at the top end orifice of the fixed hole section. The chamfer has the guide effect, conveniently installs the fixed cylinder in the fixed orifices section to make the case equipment convenient.

In the above valve core, a cover for closing the orifice at the top end of the valve hole is detachably fixed at the top end of the valve core seat. The fixed cylinder is sealed in the valve core seat through the sealing cover, so that the regulating part is prevented from rotating due to misoperation, the stability of the spring elasticity of the valve core in the use process is ensured, and the valve core works stably.

In the valve core, the valve core seat is integrally formed by PPA material.

The PPA material has good strength and hardness, good heat resistance, chemical resistance and crack resistance, can ensure the service performance and the service life of the valve core seat, can be integrally formed into the valve core seat at one time through a high-temperature injection molding process or a die casting process, and has the advantages of cost reduction, weight reduction, saving, environmental protection, convenience in processing and the like. In addition, the PPA material can be colored, and different colors can be formed on the valve core seat for distinguishing the valve core and the pressure control valve in different pressure ranges.

The pressure control valve comprises a valve body, wherein a valve cavity is arranged in the valve body, and the pressure control valve is characterized in that the valve core is arranged in the valve cavity, an installation part is arranged on the outer side surface of the valve core seat, and the installation part is detachably and fixedly connected to the valve body.

As described above, when the valve core is assembled, the valve rod is inserted into the valve hole, then the fixed cylinder is fixed into the valve hole, the spring is inserted into the adjusting hole, and finally the adjusting piece is screwed into the adjusting hole, and the adjusting piece is once loaded into the adjusting hole without reworking, so that the assembling process of the valve core is convenient and rapid.

The valve core can be separated from the valve body to be assembled to form an integrated valve core, and then the integrated valve core is fixedly connected to the valve body through the mounting part, so that the valve core is convenient to assemble on the valve body. When the valve core needs to be detached from the valve body for cleaning in the using process, the integrated valve core can be detached from the valve body for cleaning, and then the integrated valve core is assembled back, so that the valve core can be quickly and conveniently disassembled and assembled on the valve body. Moreover, after the valve core is assembled and integrated, the valve core can be produced in a modularized manner in a factory, so that the valve core is conveniently assembled on the valve body, and the production efficiency can be improved.

In the pressure control valve, the valve body is provided with a water inlet end, a water outlet end and a pressure relief end, the water inlet end is provided with a water inlet hole communicated with the valve cavity, the water outlet end is provided with a water outlet hole communicated with the valve cavity, a ball valve is installed in the water inlet hole, the pressure relief end is provided with a pressure relief hole communicated with the water outlet hole, and the pressure relief end is provided with a pressure relief valve.

The pressure control valve is installed in the pipeline through the water inlet end and the water outlet end, the ball valve is opened, water in the pipeline enters from the water inlet end, enters into the valve cavity from the water inlet hole, then flows out of the water outlet hole after passing through the valve core, and flows to the rear-end equipment of the pipeline. During normal use, its flow is restricted when water leads to the case to can produce the step-down effect, can also realize the steady voltage after the decompression and carry through the control of case, and can make the flow remain stable. When the pressure at the water outlet end is too high, the pressure can be released through the pressure release valve, and the use safety and stability of the rear-end equipment are ensured. The ball valve is arranged at the water inlet end, so that the system is convenient to measure and use.

Compared with the prior art, the utility model has the advantages of it is following:

the valve hole of valve core seat has the fixed orifices section in, fixed orifices section fit in is fixed with a fixed section of thick bamboo, through a fixed section of thick bamboo with the valve rod axial spacing for between a fixed section of thick bamboo and spacing portion, and a fixed section of thick bamboo can be installed in the fixed orifices section through the top drill way of valve hole, be provided with the regulation hole in the fixed section of thick bamboo, the spring top is inserted in the regulation hole and is leaned on the regulating part, regulating part and spring all can enter into in the regulation hole through the top flaring of regulation hole, thereby make the case equipment convenient, and make the case can realize integration and modular production, make case easy dismounting on the valve body. The step surface has a positioning function, so that the fixed cylinder is convenient to mount; the flaring section ensures that the fixed cylinder can enter the valve hole through the top orifice of the valve hole. The stop shoulder has limiting displacement to the valve rod, and the sealing washer pastes and leans on to form sealedly on the solid fixed cylinder, reducible frictional resistance makes things convenient for the installation of valve rod and solid fixed cylinder.

Drawings

FIG. 1 is a cross-sectional view of a first embodiment of the present valve cartridge;

FIG. 2 is a perspective view of a cartridge seat in a first embodiment of the present cartridge;

FIG. 3 is a cross-sectional view of a cartridge seat in a first embodiment of the present cartridge;

FIG. 4 is a cross-sectional view of the valve stem of the first embodiment of the present valve cartridge;

FIG. 5 is a cross-sectional view of a fixed cylinder in one embodiment of the present valve cartridge;

fig. 6 is a sectional view of the pressure control valve to which the present valve element is attached.

In the figure, 1, a valve core seat; 1a, a valve hole; 1a1, water outlet; 1a2, connecting segment; 1a3, sliding hole section; 1a4, fixed orifice segment; 1a5, flared section; 1a6, control plane; 1a7, a stopper; 1a8, step surface; 1b, a water inlet; 1c, an installation part; 1d, fixing the groove I; 1e, fixing a groove II; 1f, positioning a convex ring; 1g, a rotation fixing part; 2. a filter screen; 3. a valve stem; 3a, matching a ring; 3b, blind holes; 3d, positioning the first convex column; 3e, positioning a groove; 3f, fixing the convex column; 4. a spring; 5. a seal ring; 6. a seal member; 8. locking the screw; 9. a fixed cylinder; 9a, a fixing ring; 9b, a wrench fixing part; 9c, adjusting holes; 9c1, shoulder; 9c2, first segment; 9c3, second segment; 9c4, internal threads; 10. an adjustment member; 10a, a second positioning convex column; 10b, installing a positioning groove; 11. sealing the cover; 11a, a mounting ring; 12. a valve body; 12a, a valve cavity; 12b, a water inlet end; 12c, a water outlet end; 12d, a pressure relief end; 12e, a water inlet hole; 12f, water outlet holes; 12g, a pressure relief hole; 12h, mounting ports; 13. a ball valve; 14. and (4) releasing the valve.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1-6, a valve core comprises a valve core seat 1 which is integrally formed, the valve core seat 1 is integrally formed by PPA plastic through a high-temperature injection molding process or a die casting process at one time, and the valve core seat 1 can also be formed by machining from a metal material. The valve core seat 1 is provided with a valve hole 1a, the valve hole 1a penetrates through the top end surface and the bottom end surface of the valve core seat 1, and a water outlet 1a1 is formed at the top end surface of the valve core seat 1. The outer side surface of the bottom of the valve core seat 1 is provided with a water inlet 1b, and the water inlet 1b is communicated with the water outlet 1a 1. The two water inlets 1b are arranged along the circumferential direction, and the valve core seat 1 is provided with two connecting columns for separating the two water inlets 1 b. A filter screen 2 is fixed on the valve core seat 1 at the water inlet 1 b. An annular mounting part 1c is arranged on the outer side surface of the valve core seat 1, and the mounting part 1c is positioned above the top of the water inlet 1 b. The outer side surface of the valve core seat 1 is further provided with a concave fixing groove I1 d, a concave fixing groove II 1e, a convex positioning convex ring 1f and a rotating fixing part 1g, and O-shaped rings are fixed in the fixing groove I1 d and the fixing groove II 1 e. The first fixing groove 1d is located above the top of the mounting portion 1c, and the second fixing groove 1e is located below the bottom of the water inlet 1 b. The positioning convex ring 1f is positioned above the top of the first fixing groove 1d, and the rotating fixing part 1g is positioned above the positioning convex ring 1 f. The rotating fixing part 1g is provided with six positioning planes which are uniformly distributed along the circumferential direction. The valve core seat 1 is convenient to install by positioning the wrench through the positioning plane.

The valve hole 1a comprises a water outlet 1a1, a connecting section 1a2, a sliding hole section 1a3, a fixed hole section 1a4 and a flaring section 1a5 which are arranged in sequence from the bottom end to the top end of the valve hole 1 a. That is, connecting section 1a2 is located below the bottom of sliding hole section 1a3, water outlet 1a1 is located below the bottom of connecting section 1a2, fixed hole section 1a4 is located above the top of sliding hole section 1a3, flared section 1a5 is located above the top of fixed hole section 1a4, wherein the bore diameter of flared section 1a5 is larger than that of fixed hole section 1a4, and the bore diameter of fixed hole section 1a4 is larger than that of sliding hole section 1a 3. The control surface 1a6 is provided between the water outlet 1a1 and the connecting section 1a2 on the hole wall surface of the valve hole 1a, the limit part 1a7 is provided between the connecting section 1a2 and the sliding hole section 1a3 on the hole wall surface of the valve hole 1a, the step surface 1a8 is provided between the fixed hole section 1a4 and the sliding hole section 1a3 on the hole wall surface of the valve hole 1a, and the top end orifice of the fixed hole section 1a4 is provided with a chamfer on the hole wall surface of the valve hole 1 a.

A valve rod 3 penetrates through the valve hole 1a, and the valve rod 3 is rod-shaped and made of metal materials such as copper or stainless steel. The top of the valve rod 3 is abutted with a spring 4, and the spring 4 is a cylindrical spring. The outer side surface of the top of the valve rod 3 is provided with a convex matching ring 3a, the matching ring 3a is in sliding fit with the sliding hole section 1a3, and the bottom end surface of the matching ring 3a can abut against the limiting part 1a 7. The outer side surface of the top of the matching ring 3a is provided with positioning grooves 3e, sealing rings 5 are fixed in the positioning grooves 3e, and two positioning grooves 3e are sequentially arranged along the axial direction. The top end face of the valve rod 3 is provided with a blind hole 3b, the bottom surface of the blind hole 3b is provided with a convex positioning convex column I3 d, the bottom of the spring 4 is positioned in the blind hole 3b and sleeved on the positioning convex column I3 d, and the bottom end face of the spring 4 is abutted against the bottom surface of the blind hole 3 b. The bottom end of the valve rod 3 is inserted into the water outlet 1a1 and is fixedly connected with a sealing element 6, and a flow control gap is formed between the outer side surface of the sealing element 6 and the control surface 1a 6. The sealing element 6 is annular, the outer side surface of the sealing element 6 is a convex arc surface, a first deformation groove is formed in the top end surface of the sealing element 6, a second deformation groove is formed in the bottom end surface of the sealing element 6, and the elastic deformation of the sealing element 6 can be improved due to the arrangement of the first deformation groove and the second deformation groove. The bottom end face of the valve rod 3 is provided with a convex fixed convex column 3f, the sealing element 6 is sleeved on the fixed convex column 3f, the fixed convex column 3f is connected with a locking screw 8 in a threaded mode, and the locking screw 8 enables the sealing element 6 to be pressed between the valve rod 3 and the locking screw 8. The top end face of the sealing member 6 abuts against the bottom end face of the valve rod 3, and the bottom end face of the sealing member 6 abuts against the locking screw 8. The deformation of the sealing member 6 can be changed by adjusting the axial position of the locking screw 8 in the fixing boss 3 f.

A cylindrical fixed cylinder 9 is fixed in the fixed hole section 1a4 in a matching manner, the bottom end face of the fixed cylinder 9 abuts against the step face 1a8 of the valve core seat 1, and the fixed cylinder 9 is made of metal materials, such as copper or stainless steel. The fixed cylinder 9 can be fitted into the fixed bore section 1a4 from the top end orifice of the valve bore 1 a. The fixed cylinder 9 is in threaded connection with the inside of the fixed hole section 1a4, a protruding fixed ring 9a is arranged on the outer side face of the middle part of the fixed cylinder 9, the fixed ring 9a is in threaded connection with the fixed hole section 1a4, and the aperture of the flaring section 1a5 is larger than the outer diameter of the thread of the fixed hole section 1a 4. A wrench fixing part 9b is arranged on the outer side surface of the top of the fixing barrel 9, and the wrench fixing part 9b is of a hexagonal structure or a spline structure. An adjusting hole 9c is formed in the fixed cylinder 9, two ends of the adjusting hole 9c penetrate through the top end face and the bottom end face of the fixed cylinder 9 respectively, and the adjusting hole 9c and the blind hole 3b of the valve rod 3 are arranged coaxially. The wall surface of the adjusting hole 9c is provided with a stop shoulder 9c1, and the stop shoulder 9c1 divides the adjusting hole 9c into a first section 9c2 and a second section 9c3, wherein the first section 9c2 is close to the top end surface of the fixed cylinder 9, and the second end is close to the bottom end surface of the fixed cylinder 9. The top of the mating ring 3a is inserted into the second section 9c3 and can abut against the stop shoulder 9c1, and the mating ring 3a of the valve stem 3 is axially restrained between the stopper portion 1a7 and the stop shoulder 9c 1. At least one sealing ring 5 on the mating ring 3a abuts against the bore wall surface of the second section 9c3 and forms a seal. Because the valve core seat 1 is made of PPA material, the friction coefficient between the sealing ring 5 and the valve core seat 1 is larger, the fixed cylinder 9 is made of metal material, the friction coefficient between the sealing ring 5 and the fixed cylinder 9 is smaller, and the sealing ring 5 is attached to the fixed cylinder 9 to form sealing, so that the friction resistance in assembly can be reduced, and the assembly is convenient; meanwhile, the friction resistance of the valve rod 3 in the sliding process of the valve core seat 1 can be reduced, and the sensitivity of the valve core in use is ensured. The first section 9c2 has an internal thread 9c4 on the hole wall surface, and one end of the internal thread 9c4 extends to the tip end surface of the fixed cylinder 9. The outer diameter of the spring 4 is smaller than the bore diameter of the first section 9c2, the bore diameter of the blind hole 3b is larger than the bore diameter of the first section 9c2, i.e. the outer diameter of the spring 4 is smaller than the inner diameter of the internal thread 9c4, and the bore diameter of the blind hole 3b is larger than the inner diameter of the internal thread 9c 4. The top end of the spring 4 is inserted into the first section 9c2 of the adjustment hole 9c, and the spring 4 can be inserted into the adjustment hole 9c from the top end opening of the adjustment hole 9c and into the blind hole 3 b.

An adjusting piece 10 is connected with the inner thread of the adjusting hole 9c, the outer side face of the adjusting piece 10 is provided with an outer thread matched with the inner thread 9c4, and the adjusting piece 10 can be installed in the adjusting hole 9c from the top end hole of the adjusting hole 9 c. The bottom end face of the adjusting piece 10 is provided with a second protruding positioning convex column 10a, the top end of the spring 4 is sleeved on the second positioning convex column 10a, and the top end face of the spring 4 abuts against the bottom end face of the adjusting piece 10. The top end face of the adjusting piece 10 is provided with a mounting positioning groove 10b, and the mounting positioning groove 10b is in a straight shape, a cross shape or a hexagonal prism shape.

A closure cap 11 is fixed in the flared section 1a 5. The bottom end face of the cover 11 has a projecting mounting ring 11a, and the mounting ring 11a is inserted into the fixing hole section 1a4 and forms a screw connection. The outer side of the cover 11 has a sealing groove, an O-ring is fixed in the sealing groove, and the outer side of the O-ring is abutted against the hole wall surface of the flared section 1a5 to form a seal. The top end face of the sealing cover 11 is provided with a rotary positioning groove 3e, and the rotary positioning groove 3e is in a linear shape, a cross shape or a hexagonal prism shape.

As shown in fig. 6, a pressure control valve includes a valve body 12, a valve cavity 12a is provided in the valve body 12, the valve body 12 is provided with a water inlet end 12b, a water outlet end 12c and a pressure relief end 12d, the water inlet end 12b is provided with a water inlet hole 12e communicated with the valve cavity 12a, the water outlet end 12c is provided with a water outlet hole 12f communicated with the valve cavity 12a, a ball valve 13 is installed in the water inlet hole 12e, the pressure relief end 12d is provided with a pressure relief hole 12g communicated with the water outlet hole 12f, and the pressure relief end 12d is provided with a pressure relief valve 14. The valve core is installed in the valve cavity 12a, the valve body 12 is provided with an installation opening 12h communicated with the valve cavity 12a, the wall surface of the installation opening 12h is provided with a convex shoulder, and the valve core seat 1 is inserted into the valve cavity 12a through the installation opening 12 h. The mounting portion 1c of the valve core seat 1 is in threaded connection with the wall surface of the mounting opening 12h, the positioning convex ring 1f abuts against the convex shoulder of the mounting opening 12h, the O-shaped ring in the first fixing groove 1d abuts against the wall surface of the mounting opening 12h and forms sealing, and the O-shaped ring in the second fixing groove 1e abuts against the wall surface of the valve cavity 12a and forms sealing. The water inlet hole 12e is communicated with the water inlet 1b, and the water outlet hole 12f is communicated with the water outlet 1a 1.

The pressure control valve is installed in the pipeline through the water inlet end 12b and the water outlet end 12c, the ball valve 13 is opened, water in the pipeline enters from the water inlet end 12b, enters from the water inlet hole 12e into the valve core through the water inlet 1b, then flows out from the water outlet 1a1 through the flow control gap, and then enters the water outlet hole 12f and flows to the rear end equipment of the pipeline. When the valve core is used normally, the flow of water is limited when the water passes through the valve core, so that the pressure reduction effect can be generated. When the water pressure of the water inlet hole 12e changes, the water pressure at the water outlet 1a1 is increased immediately after the water pressure of the water inlet hole 12e is increased, the water pressure in the water outlet 1a1 is increased and exceeds the elastic force of the spring 4, the valve rod 3 is pushed by the water pressure to move towards the top of the valve core seat 1, and the flow control gap is reduced, so that the water pressure of the water outlet 1a1 is reduced; the water pressure at the water outlet 1a1 can be reduced immediately after the water pressure at the water inlet 12e is reduced, the water pressure at the water outlet 1a1 is reduced and is smaller than the elastic force of the spring 4, the spring 4 pushes the valve rod 3 to move towards the bottom of the valve core seat 1, the flow control gap is enlarged, so that the water pressure at the water outlet 1a1 is enlarged, and the stable output of the water pressure at the water outlet 12f in a certain range can be ensured. The control of the valve core can realize the stable pressure delivery after decompression and can keep the flow stable. When the water pressure was too big in apopore 12f, can also discharge too much water through relief valve 14, guarantee security and the stability of pipeline rear end equipment use.

When the valve core is assembled, the valve rod 3 is firstly inserted into the valve hole 1a from the top end orifice of the valve hole 1a, the matching ring 3a passes through the fixed hole section 1a4 and then is in sliding fit with the sliding hole end, and the matching ring 3a is blocked by the limiting part 1a7, so that the valve rod 3 is hung in the valve hole 1 a. Then, the fixed cylinder 9 is inserted into the valve hole 1a from the top end opening of the valve hole 1a, the fixed cylinder 9 is engaged and fixed with the fixed hole section 1a4, and the bottom end face of the fixed cylinder 9 abuts on the step face 1a 8. And then the spring 4 is inserted into the adjusting hole 9c from the top end hole of the adjusting hole 9c, so that the bottom end of the spring 4 is inserted into the blind hole 3b and sleeved on the positioning convex column I3 d. At the moment, the top of the spring 4 is positioned in the adjusting hole 9c, the spring 4 is not stressed and is in a natural extension state, the valve rod 3 moves towards the top of the valve core seat 1, the top end of the spring 4 extends out of the adjusting hole 9c, then the second positioning convex column 10a of the adjusting hole 9c is inserted into the top end of the spring 4, then the adjusting piece 10 is screwed into the adjusting hole 9c from the top end hole of the adjusting hole 9c, and the top end of the spring 4 naturally abuts against the bottom end face of the adjusting piece 10. Finally, the cover 11 is fixed to the valve hole 1 a. The adjusting piece 10 is in threaded connection with the adjusting hole 9c, and the adjusting piece 10 can move axially by rotating the adjusting piece 10, so that the pressure of the spring 4 is adjusted. The structure of the valve core enables the assembly process of the valve core to be carried out according to the steps, when the valve core is assembled according to the steps, the top end of the spring 4 naturally abuts against the adjusting part 10 in the process of assembling the adjusting part 10, the situation that the pressure of the spring 4 cannot be adjusted and continuous reworking is needed is avoided, and the assembly process of the valve core is convenient and fast.

The valve core is assembled to form an integrated valve core, and then the integrated valve core is fixedly connected to the valve body 12 through the mounting part 1c, so that the valve core is conveniently assembled on the valve body 12. When the valve core needs to be detached from the valve body 12 for cleaning in the using process, the integrated valve core can be detached from the valve body 12 for cleaning, and then the integrated valve core is installed back, so that the valve core can be quickly and conveniently disassembled and assembled on the valve body 12. Moreover, after the valve core is assembled and integrated, the modular production of the valve core can be realized in a factory, so that the valve core is conveniently assembled on the valve body 12, and the production efficiency can be improved.

Example two

The fixing structure of the fixing cylinder 9 and the fixing hole section 1a4 is different from that of the first embodiment, the structure of the cover 11 is different from that of the first embodiment, and other structures are the same as those of the first embodiment. The fixed cylinder 9 is fixed in the fixed hole section 1a4 in an interference fit manner, a fixed surface is arranged on the outer side surface of the top end of the fixed cylinder 9, and the fixed surface is in interference fit with the hole wall surface of the fixed hole section 1a 4. A mounting ring 11a is arranged on the bottom end face of the outer edge of the sealing cover 11, the mounting ring 11a is sleeved on the outer side face of the fixed cylinder 9 and forms threaded connection, the bottom end face of the sealing cover 11 abuts against the top end face of the fixed cylinder 9, and a sealing gasket is arranged between the bottom end face of the sealing cover 11 and the top end face of the fixed cylinder 9.

EXAMPLE III

The structure of the cover 11 and the top structure of the fixed cylinder 9 are different from those of the first embodiment, and the other structures are the same as those of the first embodiment. The fixed cylinder 9 is not provided with the flared section 1a5, and the top of the fixed hole section 1a4 penetrates through the top end face of the valve core seat 1. No sealing groove is formed on the outer side surface of the sealing cover 11, no O-ring is mounted, the mounting ring 11a of the sealing cover 11 is screwed into the fixing hole section 1a4, the outer edge of the sealing cover 11 abuts against the top end surface of the fixed cylinder 9, and a sealing gasket is arranged between the outer edge of the sealing cover 11 and the top end surface of the fixed cylinder 9.

Example four

The structure of the adjusting hole 9c of the fixed cylinder 9 is different from that of the first embodiment, and the other structure is the same as that of the first embodiment. The top end orifice of the adjusting hole 9c is provided with a reaming section, the aperture of the reaming section is larger than the outer diameter of the internal thread 9c4, the internal thread 9c4 is distributed on all the hole wall surfaces of the first section 9c2, and the spring 4 and the adjusting piece 10 can be inserted into the first section 9c2 through the reaming section.

EXAMPLE five

The structure of the mounting part 1c, the positioning convex ring 1f and the fixing groove 1d on the valve core seat 1 and the structure of the mounting opening 12h on the valve body 12 are different from the first embodiment, and the other structures are the same as the first embodiment. The positioning convex ring 1f is eliminated, and the outer side surface of the valve core seat 1 is provided with a nut ring which is sleeved on the valve body 12 and forms threaded connection. The first fixing groove 1d is located below the bottom of the nut ring, and an O-shaped ring in the first fixing groove 1d is attached to the wall surface of the mounting opening 12h and forms sealing.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (10)

1. The utility model provides a valve core, includes valve core seat (1), valve opening (1a) have been seted up on valve core seat (1), wear to be equipped with valve rod (3) in valve opening (1a), the top of valve rod (3) is supported and is leaned on spring (4), convex cooperation ring (3a) have on the lateral surface of valve rod (3), valve opening (1a) include with cooperation ring (3a) sliding hole section (1a3) sliding fit, a serial communication port, valve opening (1a) still includes fixed orifices section (1a4) that is located sliding hole section (1a3) top, and the aperture of fixed orifices section (1a4) is greater than the aperture of sliding hole section (1a3), fixed orifices section (1a4) fit in is fixed with fixed cylinder (9), fixed cylinder (9) can be installed in fixed orifices section (1a4) from the top of valve opening (1a), lie in the hole wall face of sliding hole section (1a3) bottom below have the protruding spacing portion 3 on the hole wall of valve opening (1a) and have a limit portion (1a7) The matching ring (3a) is axially limited between a fixed cylinder (9) and a limiting part (1a7), an adjusting hole (9c) is formed in the fixed cylinder (9), an adjusting piece (10) is connected to the inner thread of the adjusting hole (9c), the top of the spring (4) is inserted into the adjusting hole (9c) and is abutted against the adjusting piece (10), and the spring (4) and the adjusting piece (10) can be installed in the adjusting hole (9c) from the top end hole opening of the adjusting hole (9 c).

2. The valve cartridge according to claim 1, wherein a step surface (1a8) is provided on the bore wall surface of the valve bore (1a) between the sliding bore section (1a3) and the fixed bore section (1a4), and the bottom end surface of the fixed barrel (9) abuts against the step surface (1a 8).

3. The valve cartridge according to claim 1, wherein the wall surface of the adjusting hole (9c) is provided with a stop shoulder (9c1), the top of the valve rod (3) is inserted into the adjusting hole (9c) and can abut against the stop shoulder (9c1), a sealing ring (5) is fixed on the outer side surface of the top of the matching ring (3a), and the sealing ring (5) abuts against the wall surface of the adjusting hole (9c) and forms a seal.

4. The valve cartridge according to any one of claims 1 to 3, wherein a protruding fixing ring (9a) is provided on the outer side of the fixing cylinder (9), the fixing ring (9a) is screwed with the fixing hole section (1a4), and a wrench fixing portion (9b) is provided on the outer side of the top of the fixing cylinder (9).

5. The valve cartridge according to any one of claims 1 to 3, wherein the valve bore (1a) further comprises a flared section (1a5) at the top end of the valve bore (1a), the flared section (1a5) having a larger bore diameter than the fixed bore section (1a 4); or the top of the fixed hole section (1a4) penetrates through the top end surface of the valve core seat (1).

6. The valve cartridge according to any one of claims 1 to 3, wherein the bore wall surface of the adjusting bore (9c) has an internal thread (9c4) threadedly coupled to the adjusting member (10), one end of the internal thread (9c4) extends to the top end surface of the fixed barrel (9), the spring (4) is a cylindrical spring, and the outer diameter of the spring (4) is smaller than the inner diameter of the internal thread (9c 4).

7. The valve core according to claim 6, wherein a blind hole (3b) is formed in the top end face of the valve rod (3), the aperture of the blind hole (3b) is larger than the inner diameter of the internal thread (9c4), a first protruding positioning boss (3d) is arranged on the bottom surface of the blind hole (3b), the bottom of the spring (4) is located in the blind hole (3b) and sleeved on the first positioning boss (3d), a second protruding positioning boss (10a) is arranged on the bottom end face of the adjusting piece (10), and the top of the spring (4) is sleeved on the second positioning boss (10 a).

8. The valve cartridge according to any of claims 1-3, wherein the cartridge seat (1) is integrally formed from PPA material.

9. A pressure control valve, comprising a valve body (12), wherein a valve cavity (12a) is arranged in the valve body (12), characterized in that the valve cavity (12a) is provided with a valve core according to any one of claims 1 to 8, the outer side surface of the valve core seat (1) is provided with a mounting part (1c), and the mounting part (1c) is detachably and fixedly connected to the valve body (12).

10. The pressure control valve according to claim 9, wherein the valve body (12) has a water inlet end (12b), a water outlet end (12c) and a pressure relief end (12d), the water inlet end (12b) is provided with a water inlet hole (12e) communicated with the valve cavity (12a), the water outlet end (12c) is provided with a water outlet hole (12f) communicated with the valve cavity (12a), the water inlet hole (12e) is internally provided with a ball valve (13), the pressure relief end (12d) is provided with a pressure relief hole (12g) communicated with the water outlet hole (12f), and the pressure relief end (12d) is provided with a pressure relief valve (14).

Images