CN212718068U - Valve device - Google Patents

Abstract

The utility model discloses a valve device belongs to refrigeration control technical field. The valve device comprises a valve body, a valve rod and a check ring, wherein the valve body is provided with a mounting hole, at least part of the valve rod is positioned in the mounting hole, the check ring is in limit connection with the valve body, the valve body is provided with a valve port, the valve body is provided with an internal thread part, the valve rod is provided with an external thread part, and the valve rod can approach or be far away from the valve port through the thread matching action of the internal thread part and the external thread part; the valve rod comprises a transition part, when the valve device is in a full-open state, the valve rod is relatively far away from the valve port, the transition part is abutted against the check ring, and the transition part is in surface contact or line contact with the contact part of the check ring. When the valve device is in a fully-opened state, the transition part and the check ring form surface contact or line contact, the stress area is large, the abrasion of the contact part of the valve rod and the check ring can be improved, and the service life of the valve device is prolonged.

Description

Valve device

Technical Field

The utility model relates to a refrigeration control technical field especially relates to a valve gear.

Background

Valve gear generally uses in refrigerating system to be used for connecting indoor set and off-premises station, with the break-make of control refrigerant, valve gear includes valve body and valve rod, the valve body is equipped with the valve port, the valve rod can be close or keep away from the valve port through the screw-thread fit effect of valve body and valve rod, still install the stop part in the valve body, carry on spacingly to the full open position of valve rod, the valve rod is moved down when closing the valve port, the stop part is kept away from relatively to the valve rod, the valve port is opened entirely that the valve rod upwards moves and offsets with the stop part, open at the valve port completely, the valve rod upwards moves the in-process, if operation workman applys great operating torque.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a valve gear of new construction can improve the wearing and tearing phenomenon that the contact site of valve rod and stop part exists relatively.

As the conception, the utility model adopts the technical proposal that:

the valve device comprises a valve body, a valve rod and a check ring, wherein the valve body is provided with a mounting hole, at least part of the valve rod is positioned in the mounting hole, the check ring is in limit connection with the valve body, the valve body is provided with a valve port, the valve body is provided with an internal threaded part, the valve rod is provided with an external threaded part, and the valve rod can approach or be far away from the valve port through the thread matching action of the internal threaded part and the external threaded part;

the valve rod comprises a transition part, when the valve device is in a full-open state, the valve rod is relatively far away from the valve port, the transition part is abutted against the check ring, and the transition part is in surface contact or line contact with the part of the check ring, which is in contact with the transition part.

Further, the transition portion is approximately in an R-angle structure, and in the axial direction of the valve rod, the transition portion includes a first transition end portion and a second transition end portion, the second transition end portion is close to the valve port relative to the first transition end portion, the cross-sectional area where the second transition end portion is located is larger than the cross-sectional area where the first transition end portion is located, the retainer ring is approximately in the form of an annular circular retainer ring provided with an opening, and the retainer ring can form arc surface contact with the R-angle structure.

Further, the radius of the R-corner structure is greater than or equal to 0.3 mm.

Further, the retainer ring is provided with an opening and also comprises a first opening end part and a second opening end part, the first opening end part and the second opening end part are positioned on different horizontal planes, and the retainer ring can be in line contact with a contact part of the transition part.

Further, the transition portion is a step portion, the step portion includes a first fitting surface and a second fitting surface, the first fitting surface is approximately perpendicular to the second fitting surface, the retainer ring is approximately an annular rectangular retainer ring provided with an opening, the retainer ring includes a bottom surface, an inner wall surface, a top surface and an outer wall surface, the inner wall surface is approximately perpendicular to the bottom surface, the top surface is approximately perpendicular to the outer wall surface, the top surface is approximately parallel to the bottom surface, the inner wall surface is approximately parallel to the outer wall surface, the bottom surface can abut against the first fitting surface, the inner wall surface can abut against the second fitting surface, and the retainer ring and a contact portion of the transition portion form plane contact.

Further, the valve device further comprises a first bonnet covering the mounting hole, and the first bonnet is detachably connected to the valve body.

Furthermore, a flow passage communicated with the mounting hole is formed in the valve body, the flow passage comprises a first flow passage and a second flow passage which form a preset included angle, and the first flow passage is provided with the valve port communicated with the second flow passage.

Furthermore, a filling hole communicated with the flow channel is formed in the valve body, and a valve core structure is arranged in the filling hole.

Further, the valve device further includes a second bonnet covering the filling hole, and the second bonnet is detachably coupled to the valve body.

Further, the valve device further comprises a sealing ring, wherein the valve rod is sleeved with the sealing ring and tightly abutted between the valve rod and the inner wall of the mounting hole.

The utility model has the advantages that:

the utility model provides a valve gear, when valve gear is in the full open mode, through transition portion and retaining ring formation face contact or line contact, lifting surface is great to can improve the wearing and tearing that the contact site of valve rod and retaining ring exists relatively, prolong valve gear's life.

Drawings

Fig. 1 is a schematic cross-sectional view of a valve device according to an embodiment of the present invention;

FIG. 2 is an enlarged partial schematic view at A of FIG. 1;

fig. 3 is a schematic cross-sectional view of a valve stem according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of a retainer ring according to a first embodiment of the present invention;

fig. 5 is a schematic cross-sectional view of a valve device according to a second embodiment of the present invention;

FIG. 6 is an enlarged partial schematic view at B in FIG. 5;

fig. 7 is a schematic cross-sectional view of a valve stem provided in the second embodiment of the present invention;

fig. 8 is a schematic cross-sectional view of a retainer ring according to a second embodiment of the present invention;

fig. 9 is a schematic cross-sectional view of a valve device provided in a third embodiment of the present invention;

FIG. 10 is an enlarged partial schematic view at C of FIG. 9;

fig. 11 is a schematic cross-sectional view of a valve stem provided in the third embodiment of the present invention;

fig. 12 is a schematic cross-sectional view of a retaining ring according to a third embodiment of the present invention.

In the figure:

1. a valve body; 11. a flow channel; 111. a first flow passage; 112. a second flow passage; 12. mounting holes; 13. a fill hole;

2. a valve stem; 21. a transition section; 211. a first transition end portion; 212. a second transition end portion; 213. a first mating surface; 214. a second mating surface; 215. a third mating surface; 216. a fourth mating surface; 22. mounting grooves; 23. an external threaded portion;

3. a retainer ring; 31. a bottom surface; 32. an inner wall surface; 33. a top surface; 34. an outer wall surface; 35. a first open end; 36. a second open end;

4. a first bonnet; 5. a seal ring; 6. a valve core structure; 7. a second bonnet; 8. a valve seat; 9. a pipe connecting nut; 10. and (6) taking over.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Example one

As shown in fig. 1 to 4, the present embodiment provides a valve device including a valve body 1, a valve stem 2, and a retainer ring 3. Wherein, valve body 1 has mounting hole 12, and at least part valve rod 2 is located mounting hole 12, and retaining ring 3 is connected with valve body 1 spacing, and valve body 1 has the valve port, and valve body 1 is equipped with the internal thread portion, and valve rod 2 is equipped with external screw thread portion 23, through internal thread portion and external screw thread portion 23 mating reaction, and valve rod 2 can be close or keep away from the valve port. The valve rod 2 comprises a transition part 21, when the valve device is in a full-open state, the valve rod 2 is relatively far away from the valve port, the transition part 21 is abutted against the check ring 3, and the transition part 21 is in surface contact with the part contacted with the check ring 3.

Referring to fig. 1 and 2, an annular clamping groove is formed in the inner wall of the mounting hole 12 along the circumferential direction of the mounting hole 12, and a part of the retainer ring 3 is clamped in the annular clamping groove, so that the valve rod 2 can be limited in the axial direction of the valve rod 2, and the valve rod 2 is prevented from being separated from the mounting hole 12. It should be noted that, in this embodiment, when the valve stem 2 closes the valve port, that is, the valve device is in the closed state, the valve stem 2 does not contact with the retainer ring 3, and the valve stem 2 is located in the mounting hole 12. Of course, in other embodiments, the valve stem 2 may also be partially outside the mounting hole 12 when the valve device is in the closed state.

Further, as shown in fig. 3, the transition portion 21 has a substantially R-angle structure, which specifically refers to a structure having an arc-shaped surface. In the axial direction of the valve stem 2, the transition portion 21 includes a first transition end 211 and a second transition end 212, and the second transition end 212 is close to the valve port with respect to the first transition end 211. In the radial direction of the valve rod 2, the cross-sectional area where the second transition end part 212 is located is larger than the cross-sectional area where the first transition end part 211 is located, the check ring 3 is an open annular circular check ring, and the contact part of the check ring 3 and the transition part 21 forms arc surface contact. Further preferably, the radius of the R-corner structure is greater than or equal to 0.3 mm.

In this embodiment, retaining ring 3 is roughly the annular circular retaining ring that is equipped with the open-ended to retaining ring 3 can form the arc surface contact with transition portion 21 when this valve device is in the full open mode, and the lifting surface area is great, and the moment of torsion of valve rod 2 when just also making retaining ring 3 break the surface of valve rod 2 is great, thereby can improve the wearing and tearing that the contact site of valve rod 2 and retaining ring 3 exists, prolongs the life of this valve device. Further, the valve rod 2 is provided with a mounting groove 22 extending along the circumferential direction of the valve rod, the mounting groove 22 is used for mounting a sealing ring 5, the sealing ring 5 is sleeved on the valve rod 2, the sealing ring 5 is located in the mounting groove 22 and abuts against the inner wall of the mounting hole 12 and the inner wall of the mounting groove 22, and the sealing ring 5 is used for sealing between the inner walls of the valve rod 2 and the mounting hole 12. Preferably, in the present embodiment, the sealing ring 5 is an O-ring. Through setting up mounting groove 22, can carry out spacing support to sealing washer 5, avoid sealing washer 5 to shift.

Further, a flow passage 11 communicated with the mounting hole 12 is further arranged in the valve body 1, the flow passage 11 comprises a first flow passage 111 and a second flow passage 112 which form a preset included angle, and the first flow passage 111 is provided with a valve port communicated with the second flow passage 112. In addition, the valve device further comprises a valve seat 8 arranged at the valve port of the first flow channel 111, the outer wall of the valve seat 8 abuts against the inner wall of the first flow channel 111, a flow hole is formed in the valve seat 8, and the valve rod 2 can abut against the valve seat 8 to seal the flow hole, so that the valve device is in a closed state. Preferably, in this embodiment, the preset included angle is 90 °, and in other embodiments, the preset included angle may also be set according to actual needs.

Optionally, the valve device further comprises a first bonnet 4, the first bonnet 4 covers the mounting hole 12, the first bonnet 4 is detachably connected to the valve body 1, and the first bonnet 4 is used for sealing the mounting hole 12, so that the sealing effect between the valve rod 2 and the inner wall of the mounting hole 12 is further improved. Preferably, in the present embodiment, the first bonnet 4 is threadedly coupled to the valve body 1. Further, in order to improve the sealing effect, a first annular protrusion is arranged in the first bonnet 4, and when the first bonnet 4 is installed on the valve body 1, the first annular protrusion abuts against the end face of the installation hole 12. It can be understood that the sealing ring 5 forms a first seal, the first annular protrusion presses against the end face of the mounting hole 12 to form a second seal, and the first bonnet 4 is screwed on the valve body 1 to form a third seal, so that the sealing effect is enhanced by the three seals.

Referring to fig. 1 again, a filling hole 13 communicated with the flow passage 11 is further formed in the valve body 1 of the valve device, a valve core structure 6 is arranged in the filling hole 13, and the filling hole 13 is used for filling a refrigerant into the flow passage 11. The valve core structure 6 is a common structure in the prior art, and is not described in detail herein.

As shown in fig. 1, the valve device further includes a second bonnet 7, and the second bonnet 7 is detachably attached to the valve body 1 for sealing the filling hole 13. Preferably, in the present embodiment, the second bonnet 7 is screwed to the valve body 1, and further, in order to improve the sealing effect, a second annular protrusion is provided in the second bonnet 7, and when the second bonnet 7 is mounted on the valve body 1, the second annular protrusion abuts against the end surface of the filling hole 13. It can be understood that valve inside structure 6 forms first seal, and the second annular arch supports to press and forms second seal in the terminal surface that fills notes hole 13, and second valve cap 7 threaded connection forms third seal in valve body 1, can improve the sealed effect to filling and annotating hole 13, avoids the refrigerant to reveal by filling and annotating hole 13.

As shown in fig. 1, the valve device further includes a nipple nut 9, and the nipple nut 9 is threadedly connected to the valve body 1 for connection to a connection line of the household appliance. Further, the valve device further includes a connection pipe 10, one end of the connection pipe 10 is inserted into the first flow channel 111, and the connection pipe 10 is used for connecting a connection pipeline of the household electrical appliance.

In summary, the valve device provided by this embodiment, when the valve device is in the fully open state, the transition portion 21 and the retainer ring 3 form a surface contact, and the force-receiving area is relatively large, so that the torque of the valve rod 2 is increased when the retainer ring 3 crushes the surface of the valve rod 2, thereby improving the abrasion of the contact portion between the valve rod 2 and the retainer ring 3 and prolonging the service life of the valve device.

Example two

As shown in fig. 5 to 8, the valve device provided in this embodiment has substantially the same structure as the valve device in the first embodiment, except that: specifically, as shown in fig. 7, the transition portion 21 is a stepped portion, the stepped portion includes a first mating surface 213 and a second mating surface 214, and the first mating surface 213 is substantially perpendicular to the second mating surface 214. As shown in fig. 8, the retainer 3 is a substantially annular rectangular retainer provided with an opening, the retainer 3 includes a bottom surface 31 and an inner wall surface 32, and further includes a top surface 33 and an outer wall surface 34, the inner wall surface 32 is substantially perpendicular to the bottom surface 31, the top surface 33 is substantially perpendicular to the outer wall surface 34, the top surface 33 is substantially parallel to the bottom surface 31, and the inner wall surface 32 is substantially parallel to the outer wall surface 34. When the valve device is in a fully open state, the bottom surface 31 abuts against the first matching surface 213, the inner wall surface 32 abuts against the second matching surface 214, the contact part of the check ring 3 and the transition part 21 forms plane contact, the stress area is relatively large, the torque of the valve rod 2 is increased when the check ring 3 breaks the surface of the valve rod 2, the abrasion of the contact part of the valve rod 2 and the check ring 3 can be improved, and the service life of the valve device is prolonged.

In addition, the valve body 1 of the valve device provided in the present embodiment is not provided with the filling hole 13, and the valve device does not have the valve core structure 6 and the second bonnet 7.

The rest of the structure of the valve device provided in this embodiment is the same as that of the valve device in the first embodiment, and is not described herein again.

EXAMPLE III

As shown in fig. 9 to 12, the valve device provided in this embodiment has substantially the same structure as the valve device in the first embodiment, except that: as shown in fig. 11, in the present embodiment, the transition portion 21 includes a third mating surface 215 and a fourth mating surface 216 at a predetermined included angle, the third mating surface 215 is substantially parallel to the axis of the valve stem 2, and the retainer ring 3 can form line contact with a contacted portion of the fourth mating surface 216. Specifically, as shown in fig. 12, the retainer ring 3 has an opening, and further includes a first opening end portion 35 and a second opening end portion 36, and when the transition portion 21 is not abutted against the retainer ring 3, the first opening end portion 35 and the second opening end portion 36 are located on different horizontal planes. When the transition portion 21 abuts against the retainer ring 3, the retainer ring 3 can make line contact with the contact portion of the transition portion 21. Further, in the present embodiment, the radial cross section of the retainer ring 3 is circular. Of course, in the embodiment, the transition portion 21 may also be an R-angle structure, and the retainer ring 3 can be in line contact with the arc surface of the R-angle structure.

It is understood that, with the annular clamping groove having a fixed size, by using the retainer ring 3 provided in this embodiment, when the valve stem 2 is screwed to open the valve port, the valve stem 2 gradually approaches the retainer ring 3, and when the valve device is in the fully open state, the retainer ring 3 contacts the fourth mating surface 216, and with the same distance between the openings of the retainer ring 3, the first opening end 35 and the second opening end 36 of the retainer ring 3 provided in this embodiment are located on different horizontal planes, so that the circumferential length of the retainer ring 3 is greater than the circumferential length of the retainer ring 3 with the two opening ends located on the same horizontal plane as in the above-described first embodiment or second embodiment. Therefore, when the retainer ring 3 provided in this embodiment contacts the fourth mating surface 216, the length of the line of contact between the retainer ring 3 and the fourth mating surface 216 is longer than the length of the line of contact between the retainer ring 3 and the fourth mating surface 216, in which the two open end portions are located on the same horizontal plane as in the above-described first or second embodiment, so that the wear of the contact portion between the valve stem 2 and the retainer ring 3 can be improved, and the service life of the valve device can be prolonged.

The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The valve device is characterized by comprising a valve body (1), wherein the valve body (1) is provided with a mounting hole (12), and further comprising a valve rod (2) and a check ring (3), at least part of the valve rod (2) is positioned in the mounting hole (12), the check ring (3) is in limit connection with the valve body (1), the valve body (1) is provided with a valve port, the valve body (1) is provided with an internal threaded part, the valve rod (2) is provided with an external threaded part (23), and the valve rod (2) can approach or be far away from the valve port through the thread matching action of the internal threaded part and the external threaded part (23);

the valve rod (2) comprises a transition part (21), when the valve device is in a full-open state, the valve rod (2) is relatively far away from the valve port, the transition part (21) is abutted against the retainer ring (3), and the transition part (21) is in surface contact or line contact with the contact part of the retainer ring (3).

2. A valve device according to claim 1, wherein the transition portion (21) is substantially in an R-angle structure, in the axial direction of the valve rod (2), the transition portion (21) comprises a first transition end portion (211) and a second transition end portion (212), the second transition end portion (212) is close to the valve port relative to the first transition end portion (211), the second transition end portion (212) is located at a cross-sectional area larger than that of the first transition end portion (211), the retainer ring (3) is substantially in the form of an annular circular retainer ring provided with an opening, and the retainer ring (3) can be in arc surface contact with the R-angle structure.

3. The valve apparatus of claim 2, wherein the radius of the R-corner structure is greater than or equal to 0.3 mm.

4. A valve device according to claim 1, wherein the collar (3) has an opening and further comprises a first opening end (35) and a second opening end (36), the first opening end (35) and the second opening end (36) being located on different levels, the collar (3) being capable of making line contact with the contact point of the transition portion (21).

5. The valve device according to claim 1, wherein the transition portion (21) is a stepped portion including a first mating surface (213) and a second mating surface (214), the first mating surface (213) is substantially perpendicular to the second mating surface (214), the retainer ring (3) is substantially a ring-shaped rectangular retainer ring provided with an opening, the retainer ring (3) includes a bottom surface (31), an inner wall surface (32), a top surface (33), and an outer wall surface (34), the inner wall surface (32) is substantially perpendicular to the bottom surface (31), the top surface (33) is substantially perpendicular to the outer wall surface (34), the top surface (33) is substantially parallel to the bottom surface (31), the inner wall surface (32) is substantially parallel to the outer wall surface (34), and the bottom surface (31) is capable of abutting against the first mating surface (213), the inner wall surface (32) can abut against the second mating surface (214), and the retainer ring (3) is in planar contact with a contact portion of the transition portion (21).

6. A valve arrangement according to any one of claims 1-5, characterized in that the valve arrangement further comprises a first bonnet (4) covering the mounting hole (12), the first bonnet (4) being detachably connected to the valve body (1).

7. The valve device according to any one of claims 1 to 5, characterized in that the valve body (1) is provided with a flow passage (11) communicated with the mounting hole (12), the flow passage (11) comprises a first flow passage (111) and a second flow passage (112) which are at a preset included angle, and the first flow passage (111) is provided with the valve port communicated with the second flow passage (112).

8. The valve device according to claim 7, characterized in that the valve body (1) is further provided with a filling hole (13) communicated with the flow passage (11), and a valve core structure (6) is arranged in the filling hole (13).

9. A valve device according to claim 8, characterized in that it further comprises a second bonnet (7) covering said filling hole (13), said second bonnet (7) being removably connected to said valve body (1).

10. The valve device according to any one of claims 1 to 5, further comprising a sealing ring (5), wherein the sealing ring (5) is sleeved on the valve rod (2) and is abutted between the valve rod (2) and the inner wall of the mounting hole (12).

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