CN210218761U

CN210218761U - Needle valve

Info

Publication number: CN210218761U
Application number: CN201920795760.4U
Authority: CN
Inventors: Wei Liu; 刘伟; Anda Zhao; 赵安达; Dongshan Deng; 邓东山; Zhe Hu; 胡哲
Original assignee: CHENGDA SPECIAL VALVE PLANT ZHEJIANG
Current assignee: CHENGDA SPECIAL VALVE PLANT ZHEJIANG
Priority date: 2019-05-29
Filing date: 2019-05-29
Publication date: 2020-03-31
Anticipated expiration: 2029-05-29

Abstract

The utility model relates to a needle valve, including spherical case, valve body and case controller, spherical case installs in the valve body, be provided with the runner in the valve body, be provided with the disk seat in the runner, the case controller is including rotating handle and valve rod, valve rod axial one end and rotation handle fixed connection, the other end and spherical case threaded connection, the periphery that the valve rod is located spherical case end is provided with the fixed station, the fixed station is provided with first fixed orifices, spherical case is provided with the second fixed orifices, be provided with the dead lever in first fixed orifices and the second fixed orifices, first fixed orifices deviates from the second fixed orifices side and extends and be provided with the dismantlement hole that supplies the dead lever to withdraw from the second fixed orifices completely. Adopt above-mentioned scheme, thereby provide a valve rod and can't rotate relatively spherical case and guarantee that can not take place cooperation angular deviation and lead to a needle valve of leaking in the long-term use of spherical case.

Description

Needle valve

Technical Field

The utility model relates to a ball valve, concretely relates to needle type valve.

Background

The needle valve is a valve for precise adjustment, and mainly comprises a stop valve and a ball valve.

In addition, in the case of a needle valve such as a ball valve, since the needle valve is generally applied to a high-pressure environment, the requirements for fixing the valve stem and the spherical valve element and for sealing between the valve element and the valve seat are high.

And the connection mode between the valve rod and the spherical valve core in the existing needle valve adopts thread sealing connection, so that in the long-term use process, the thread between the valve rod and the spherical valve core has looseness phenomenon to cause the deviation of the installation angle, and the valve rod can not be completely sealed in a closed state, thereby affecting the sealing property.

Disclosure of Invention

Not enough to prior art exists, the utility model aims to provide a thereby the unable relative spherical case of valve rod rotates and guarantees that the long-term use of spherical case can not take place to cooperate the angular deviation and lead to a needle valve of leakage.

In order to achieve the above purpose, the utility model provides a following technical scheme: including spherical case, valve body and case controller, spherical case installs in the valve body, is provided with the runner that seals or open by spherical case in the valve body, lies in spherical case both sides in the runner and is provided with respectively with the sealed complex disk seat of spherical case, and the case controller sets up with spherical case linkage, and it is including rotating handle and valve rod, valve rod axial one end with rotate handle fixed connection, the other end and spherical case threaded connection, its characterized in that: the ball valve is characterized in that a fixing table is arranged on the periphery of the end, located at the ball valve core, of the valve rod, more than one first fixing hole is formed in the fixing table in a circumferential arrangement mode along the valve rod, the axial direction of the first fixing hole is parallel to the axial direction of the valve rod, a second fixing hole is coaxially arranged in the ball valve core relative to the first fixing hole, a fixing rod for connecting the valve rod with the ball valve core is arranged in the first fixing hole and the second fixing hole, the peripheral shape and size of the fixing rod are matched with the first fixing hole and the second fixing hole, and a dismounting hole for enabling the fixing rod to completely withdraw from the second fixing hole is formed in the first fixing hole in a mode of deviating from the.

By adopting the technical scheme, the threaded connection of the valve rod and the spherical valve core plays a main fixed connection role and is used for bearing and transmitting main torque in the rotating process, and the eccentric fixation of the valve rod and the spherical valve core is realized by matching the first fixing hole and the second fixing hole on the fixing table and the spherical valve core with the fixing rods, so that the valve rod and the spherical valve core cannot rotate relatively after the installation is finished, the spherical valve core cannot generate position deviation relative to the valve rod, and the leakage of the spherical valve core relative to the valve body caused by the deviation of the installation position is avoided; in addition, the arrangement of the dismounting holes provides an effective mounting way for mounting the fixing rod.

The utility model discloses further set up to: the inner wall of the second fixing hole is provided with an internal thread, and the fixing rod is provided with an external thread matched with the internal thread towards the end of the second fixing hole.

Through adopting above-mentioned technical scheme, the external screw thread interconnect on internal thread and the dead lever on the second fixed orifices realizes the fixed of dead lever and ball valve core, prevents that the dead lever from breaking away from the second fixed orifices because of fixing inefficacy with ball valve core to lead to the valve rod to rotate ball valve core relatively.

The utility model discloses further set up to: and a dismounting spring which is pushed out of the second fixing hole by a fixing rod is arranged in the second fixing hole, the dismounting spring is in a compressed state, one end of the dismounting spring is abutted against the spherical valve core, and the other end of the dismounting spring is abutted against the end, facing the second fixing hole, of the fixing rod.

Through adopting above-mentioned technical scheme, dismantle the setting of spring for when dead lever and second fixed orifices break away from screw-thread fit, provide elasticity by dismantling the spring and push away from the second fixed orifices with the dead lever, make the more convenient of dismantlement.

The utility model discloses further set up to: the valve body is provided with an installation track for the valve seat to slide along the direction of a flow channel far away from the spherical valve core, a plurality of barb clamping blocks for preventing the valve seat from being separated from installation are arranged on the periphery of the valve seat along the axial direction, a plurality of barb clamping grooves with matched shapes and sizes are arranged on the valve body corresponding to the barb clamping blocks, and each barb clamping groove is internally provided with an anti-retreating surface for preventing the barb clamping blocks from moving from the corresponding barb clamping grooves towards the barb clamping grooves close to the spherical valve core side and a guide surface for guiding the barb clamping blocks to move from the corresponding barb clamping grooves towards the barb clamping.

Through adopting above-mentioned technical scheme, the installation track set up to the disk seat and installed in the valve body and provided the installation route, and barb fixture block has then realized with setting up of barb draw-in groove that the disk seat can only be installed along the installation direction, can't dismantle, after the installation is accomplished, play axial limiting displacement, the stability of disk seat installation has been guaranteed, a leakproofness for adapting to needle type valve height requires, wherein prevent that the disk seat from withdrawing by preventing moving back the face and support, and the guide face then plays the effect that makes the disk seat install along the installation direction more smoothly.

The utility model discloses further set up to: the valve seat is provided with a plurality of convex rings on the end face deviating from the spherical valve core, and the valve body is provided with a groove for the convex rings to be inserted.

Through adopting above-mentioned technical scheme, bulge loop and recess are mutually supported for the disk seat card is located in the valve body, plays limiting displacement to the radial displacement of disk seat, guarantees the validity of disk seat and valve body installation, is used for adapting to the leakproofness of needle valve high requirement.

The utility model discloses further set up to: and a compensation spring used for extruding the valve seat towards the spherical valve core is arranged between the valve body and the valve seat, the compensation spring is in a compressed state, and the expansion direction of the compensation spring is the same as the movement direction of the valve seat towards the spherical valve core.

Through adopting above-mentioned technical scheme, compensation spring's setting makes the disk seat carry out the compensation seal towards spherical case in certain extent, has improved sealed validity.

The utility model discloses further set up to: the flow channel is positioned on two sides of the spherical valve core and comprises a flow inlet channel and a flow outlet channel, a main sealing surface which is in extrusion sealing with the spherical valve core is arranged on the valve seat, a pressure sealing cavity is arranged in the valve seat positioned on the side of the flow inlet channel and is communicated with the flow inlet channel, a pressure sealing surface which is in the same size as the main sealing surface and is arranged in parallel is arranged in the pressure sealing cavity, and the main sealing surface is positioned on an extending track of the pressure sealing surface along the direction of the pressure sealing cavity which is vertical to the pressure sealing surface.

By adopting the technical scheme, the pressure sealing cavity communicated with the inlet channel is arranged in the valve seat on the side of the inlet channel, and the pressure sealing surface is arranged in the pressure sealing cavity, so that the inlet pressure acts on the pressure sealing surface, and the generated pressure is transferred to the main sealing surface through the valve seat, thereby more effectively sealing the sealing surface and the spherical valve core.

The utility model discloses further set up to: and a stressed metal plate attached to the pressure sealing surface is arranged in the pressure sealing cavity, and a stressed surface which is the same as and parallel to the pressure sealing surface in size is arranged on the side of the stressed metal plate departing from the pressure sealing surface.

By adopting the technical scheme, the pressure sealing surface is replaced by the pressure metal plate to bear the pressure from the flow channel, the valve seat made of rubber is prevented from deforming under the stress to change the transmitted pressure direction, and the excellent rigidity of metal is utilized to ensure that the stress direction is more stable.

The utility model discloses further set up to: and deformation preventing plates attached to the side walls of the pressure sealing cavities on the two sides of the pressure sealing surface are respectively arranged on the two sides of the pressed metal plate, and the two deformation preventing plates are parallel to each other and are perpendicular to the pressed metal plate.

By adopting the technical scheme, 1, the deformation preventing plates are arranged, so that the pressure in the pressure sealing cavity acts on the deformation preventing plates and cannot act on the valve seat to cause the valve seat to deform, 2, the two deformation preventing plates are parallelly positioned at two sides of the pressed metal plate to enable the forces generated between the two deformation preventing plates to be mutually offset, and 3, the two deformation preventing plates are perpendicular to the pressed metal plate to enable the acting force acting on the deformation preventing plates to have no influence on the pressed metal plate.

The invention is further described with reference to the accompanying drawings and the detailed description.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the present invention;

FIG. 2 is an enlarged view of A in FIG. 1;

fig. 3 is an enlarged view of B in fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the utility model discloses a needle valve, which comprises a valve body 1, a valve cover 2, a spherical valve core 3 and a valve core controller 4, wherein the valve body 1 is arranged on the right side, the valve cover 2 is arranged on the left side, the spherical valve core 3 is clamped between the valve cover 2 and the valve body 1, and the valve cover 2 and the valve body 1 are sealed and effectively fixedly installed into a whole through bolts and rubber rings; a flow passage 5 penetrates through the valve body 1 and the valve cover 2 from left to right, the flow passage 5 is divided into a flow inlet passage 51 positioned on the side of the valve cover 2 and a flow outlet passage 52 positioned on the side of the valve body 1, and whether the flow inlet passage 51 and the flow outlet passage 52 are connected or not is controlled by the spherical valve core 3; in addition, valve seats 6 are respectively arranged between the valve cover 2 and the spherical valve core 3 and between the valve body 1 and the spherical valve core 3, and are used for sealing gaps between the valve cover 2 and the spherical valve core 3 and between the valve body 1 and the spherical valve core 3 and preventing a medium in the flow channel 5 from passing through the spherical valve core 3 to be transmitted; in addition, the valve core controller 4 comprises a rotating handle 41 and a valve rod 42, wherein the rotating handle 41 is arranged outside the valve body 1, is externally connected with the rotating handle 41 through the valve rod 42, and penetrates through the valve body 1 and is connected with the spherical valve core 3 through the inward thread 32.

In the embodiment, a rubber ring is arranged at the penetrating position of the valve rod 42 and the valve body 1, and is used for sealing the position and preventing the fluid medium from leaking through the position.

As shown in fig. 1-2, a cylindrical fixing table 421 is disposed on the periphery of the end of the valve rod 42 located at the spherical valve core 3 in the present embodiment, wherein the fixing table 421 is provided with one or more first fixing holes 4211 arranged along the circumferential direction of the valve rod 42 (in the present embodiment, the number of the first fixing holes 4211 is four first fixing holes 4211 arranged at equal intervals along the circumferential direction), the axial direction of the first fixing holes 4211 is parallel to the axial direction of the valve rod 42, in addition, the spherical valve core 3 is provided with a second fixing hole 31 coaxially arranged with respect to the first fixing hole 4211, in addition, fixing rods 422 are inserted into the first fixing holes 4211 and the second fixing holes 31 for connecting the valve rod 42 and the spherical valve core 3, and the peripheral shape and size of the fixing rods 422 are matched with the first fixing holes 4211 and the second fixing holes 31. Therefore, the valve rod 42 is in threaded fit with the ball valve core 3, and the upper fixing rod 422 is inserted into the first fixing hole 4211 and the second fixing hole 31 in a matching manner, so that the ball valve core 3 cannot rotate relative to the valve rod 42, and the stability and effectiveness of the installation of the ball valve core 3 are ensured.

In addition, in the embodiment, the first fixing hole 4211 is provided with a detachment hole 4212 extending away from the second fixing hole 31, and the fixing rod 422 can slide towards the detachment hole 4212 and gradually separate from the second fixing hole 31 in the sliding process, so that the locking of the fixing rod 422 is released, and detachment is realized.

Preferably, the inner wall of the second fixing hole 31 in this embodiment is provided with an internal thread 32, and the fixing rod 422 is provided with an external thread 4221 matching with the internal thread 32 towards the end of the second fixing hole 31. The fixing rod 422 and the second fixing hole 31 are installed in a threaded fit manner, so that the fixing rod 422 is prevented from freely sliding in the first fixing hole 4211, the second fixing hole 31 and the dismounting hole 4212, and the fit of the fixing rod 422 on the valve rod 42 and the ball valve core 3 is released.

Preferably, the bottom end of the second fixing hole 31 in this embodiment is provided with a detaching spring 33, wherein the detaching spring 33 is in a compressed state, and one end of the detaching spring abuts against the ball valve core 3, and the other end abuts against the fixing rod 422 towards the end of the second fixing hole 31. Therefore, the fixed connection of the stem 42 and the ball valve core 3 by the fixing rod 422 can be released by pushing the fixing rod 422 out of the second fixing hole 31 by the detaching spring 33 without screw-fitting the fixing rod 422.

As shown in fig. 1 and 3, the valve body 1 and the bonnet 2 in the present embodiment are provided with mounting rails 53 on which the valve seat 6 on the corresponding side slides in the direction away from the flow passage 5 of the ball valve element 3.

The valve seat 6 in this embodiment is made of rubber.

In addition, more than one barb fixture blocks 61 (five in this embodiment) for preventing the valve seat 6 from being detached from the installation are axially arranged on the periphery of the valve seat 6 in this embodiment, and the valve body 1 and the valve cover 2 are provided with barb clamp grooves 54 with matched shapes and sizes corresponding to the barb fixture blocks 61; in each barb lock groove 54, a retreat prevention surface 541 and a guide surface 542 are provided. The anti-receding surface 541 is perpendicular to the sliding direction of the valve seat 6, and is used for preventing the barb clamping block 61 from moving from the corresponding barb clamping groove 54 to the barb clamping groove 54 close to the spherical valve core 3 side; the guide surface 542 connects and connects the two anti-receding surfaces 541 in an inclined manner, and guides the barb lock 61 to move from the corresponding barb lock groove 54 toward the barb lock groove 54 on the side away from the ball valve element 3. And in the same barb catching groove 54, the retreat prevention surface 541 is closer to the ball valve element 3 than the guide surface 542.

Preferably, the end surface of the valve seat 6 away from the spherical valve core 3 in this embodiment is integrally provided with more than one convex ring 62 (seven convex rings in this embodiment), and the valve body 1 is provided with a groove 55 for the convex ring 62 to be inserted into, corresponding to the convex ring 62.

So that the valve seat 6 is limited axially and radially to a certain extent under the action of the barb clamping block 61 and the convex ring 62.

Preferably, a compensation spring 56 is disposed between the valve body 1 and the valve seat 6 in the present embodiment, and the compensation spring 56 is in a compressed state and has an expansion direction the same as a moving direction of the valve seat 6 toward the ball valve element 3. Thus, the dynamic compensation seal is achieved by the compensation spring 56 pressing the valve seat 6 against the ball valve element 3.

In addition, the surface of the valve seat 6 and the spherical valve element 3 directly pressing and sealing is the main sealing surface 63, and a pressure sealing cavity 64 is formed in the valve seat 6 on the side of the flow inlet channel 51, and a through hole 511 is formed in the valve cover 2, so that the pressure sealing cavity 64 is communicated with the flow inlet channel 51, in addition, a pressure sealing surface 641 which has the same shape and size as the main sealing surface 63 and is parallel to the main sealing surface 63 is arranged in the pressure sealing cavity 64, and the extension of the pressure sealing surface 641 along the direction of the pressure sealing cavity 64 vertically facing the pressure sealing surface 641 coincides with the main sealing surface 63. Therefore, the pressure generated by the high-pressure fluid in the inlet passage 51 can effectively act on the main sealing surface 63 through the pressure sealing surface 641 in a torque-free pressure manner, so that the sealing effect between the main sealing surface 63 and the ball valve element 3 is better.

Preferably, in the pressure sealing chamber 64 in this embodiment, a pressed metal plate 7 attached to the pressure sealing surface 641 is provided, and a force receiving surface 71 having the same size and parallel shape as the pressure sealing surface 641 is provided on the side of the pressed metal plate 7 away from the pressure sealing surface 641. Therefore, the pressure-receiving metal plate 7 receives the pressure from the flow path 5 instead of the pressure seal surface 641, and the pressure-receiving metal plate prevents the rubber valve seat 6 from being deformed by the force and changing the direction of the transmitted pressure, and further stabilizes the force-receiving direction by the excellent rigidity of the metal.

Preferably, the two sides of the pressed metal plate 7 in this embodiment are respectively provided with the deformation-preventing plates 72 attached to the sidewalls of the pressure-sealed cavities 64 on the two sides of the pressure-sealed surface 641, and the two deformation-preventing plates 72 are parallel to each other and perpendicular to the pressed metal plate 7. Therefore, the deformation-preventing plates 72 are arranged so that the pressure in the pressure sealing chamber 64 acts on the deformation-preventing plates 72 and cannot act on the valve seat 6 to deform the valve seat 6, and the two deformation-preventing plates 72 are parallel to both sides of the pressed metal plate 7, so that the forces generated between the two deformation-preventing plates 72 are offset, and the two deformation-preventing plates 72 are perpendicular to the pressed metal plate 7, so that the acting force acting on the deformation-preventing plates 72 has no influence on the pressed metal plate 7.

Claims

1. The utility model provides a needle valve, includes spherical case, valve body and case controller, and spherical case installs in the valve body, is provided with the runner that seals or open by spherical case in the valve body, lies in spherical case both sides in the runner and is provided with respectively with the sealed complex disk seat of spherical case, and the case controller sets up with spherical case linkage, and it is including rotating handle and valve rod, valve rod axial one end with rotate handle fixed connection, the other end and spherical case threaded connection, its characterized in that: the ball valve is characterized in that a fixing table is arranged on the periphery of the end, located at the ball valve core, of the valve rod, more than one first fixing hole is formed in the fixing table in a circumferential arrangement mode along the valve rod, the axial direction of the first fixing hole is parallel to the axial direction of the valve rod, a second fixing hole is coaxially arranged in the ball valve core relative to the first fixing hole, a fixing rod for connecting the valve rod with the ball valve core is arranged in the first fixing hole and the second fixing hole, the peripheral shape and size of the fixing rod are matched with the first fixing hole and the second fixing hole, and a dismounting hole for enabling the fixing rod to completely withdraw from the second fixing hole is formed in the first fixing hole in a mode of deviating from the.

2. A needle valve as defined in claim 1, wherein: the inner wall of the second fixing hole is provided with an internal thread, and the fixing rod is provided with an external thread matched with the internal thread towards the end of the second fixing hole.

3. A needle valve as defined in claim 2, wherein: and a dismounting spring which is pushed out of the second fixing hole by a fixing rod is arranged in the second fixing hole, the dismounting spring is in a compressed state, one end of the dismounting spring is abutted against the spherical valve core, and the other end of the dismounting spring is abutted against the end, facing the second fixing hole, of the fixing rod.

4. A needle valve as defined in claim 1, wherein: the valve body is provided with an installation track for the valve seat to slide along the direction of a flow channel far away from the spherical valve core, a plurality of barb clamping blocks for preventing the valve seat from being separated from installation are arranged on the periphery of the valve seat along the axial direction, a plurality of barb clamping grooves with matched shapes and sizes are arranged on the valve body corresponding to the barb clamping blocks, and each barb clamping groove is internally provided with an anti-retreating surface for preventing the barb clamping blocks from moving from the corresponding barb clamping grooves towards the barb clamping grooves close to the spherical valve core side and a guide surface for guiding the barb clamping blocks to move from the corresponding barb clamping grooves towards the barb clamping.

5. A needle valve as defined in claim 1, wherein: the valve seat is provided with a plurality of convex rings on the end face deviating from the spherical valve core, and the valve body is provided with a groove for the convex rings to be inserted.

6. A needle valve as defined in claim 1, wherein: and a compensation spring used for extruding the valve seat towards the spherical valve core is arranged between the valve body and the valve seat, the compensation spring is in a compressed state, and the expansion direction of the compensation spring is the same as the movement direction of the valve seat towards the spherical valve core.

7. A needle valve as defined in claim 1, wherein: the flow channel is positioned on two sides of the spherical valve core and comprises a flow inlet channel and a flow outlet channel, a main sealing surface which is in extrusion sealing with the spherical valve core is arranged on the valve seat, a pressure sealing cavity is arranged in the valve seat positioned on the side of the flow inlet channel and is communicated with the flow inlet channel, a pressure sealing surface which is in the same size as the main sealing surface and is arranged in parallel is arranged in the pressure sealing cavity, and the main sealing surface is positioned on an extending track of the pressure sealing surface along the direction of the pressure sealing cavity which is vertical to the pressure sealing surface.

8. A needle valve as defined in claim 7, wherein: and a stressed metal plate attached to the pressure sealing surface is arranged in the pressure sealing cavity, and a stressed surface which is the same as and parallel to the pressure sealing surface in size is arranged on the side of the stressed metal plate departing from the pressure sealing surface.

9. A needle valve as defined in claim 8, wherein: and deformation preventing plates attached to the side walls of the pressure sealing cavities on the two sides of the pressure sealing surface are respectively arranged on the two sides of the pressed metal plate, and the two deformation preventing plates are parallel to each other and are perpendicular to the pressed metal plate.