CN216742847U - Stop valve and refrigerating system thereof - Google Patents

Abstract

The utility model relates to a refrigeration technology field especially relates to stop valve and refrigerating system thereof. The utility model provides a stop valve, includes valve body and case, the case is located in the valve body to can along the axial motion of valve body is used for opening and close the stop valve, be connected with first connecting pipe on the valve body, be equipped with on the valve body with the first opening of first connecting pipe intercommunication, be equipped with first annular arch on the valve body, first annular arch encircles first opening setting, first annular arch is kept away from one side of valve body with first connecting pipe is through melting welded connection fixed. The self-fluxing welding method has the advantages that the self-fluxing welding strength is high, the requirement on the first formed annular bulge is low, the processing difficulty is reduced, and the cost is reduced; and, inside first communicating pipe did not insert first annular arch, then first annular arch can not form the step with first communicating pipe, and the self-fluxing welds and makes the junction between them more level and more smooth, has reduced the dust accumulation, also more pleasing to the eye.

Description

Stop valve and refrigerating system thereof

Technical Field

The utility model relates to a refrigeration technology field especially relates to stop valve and refrigerating system thereof.

Background

In a refrigeration system, a shut-off valve is used to perform an important function of cutting off and throttling a medium in a pipeline where the shut-off valve is located, and an opening and closing member of the shut-off valve is a valve core.

The prior art is that the first opening part on the valve body forms the turn-ups to increase welding area, guarantee brazed welding strength, turn-ups's internal diameter need be greater than the external diameter of first communicating pipe, and turn-ups's inner wall need be on a parallel with the pipe wall of first communicating pipe, supply first communicating pipe to insert first opening with this, it is spacing to form circumference first communicating pipe. In addition, the first communication pipe is inserted into the first opening and needs to be axially limited so as to prevent the first communication pipe from being inserted too deeply to influence the axial movement of the valve core. So set up, it is high to forming the processing technology and the follow-up assembly process requirement of turn-ups, consume with high costsly.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model provides a stop valve to above-mentioned problem, technical scheme as follows:

the utility model provides a stop valve, includes valve body and case, the case is located in the valve body to can along the axial motion of valve body is used for opening and close the stop valve, be connected with first connecting pipe on the valve body, be equipped with on the valve body with the first opening of first connecting pipe intercommunication, be equipped with first annular arch on the valve body, first annular arch encircles first opening setting, first annular arch is kept away from one side of valve body with first connecting pipe is through melting welded connection fixed.

Due to the arrangement, the self-fluxing welding strength is high, the inner diameter of the first annular bulge at the first opening is not required to be larger than the outer diameter of the first communication pipe, and the inner wall of the first annular bulge is not required to be parallel to the pipe wall of the first communication pipe for the first communication pipe to be inserted, so that the processing difficulty is reduced, and the cost is reduced; and, inside first communicating pipe did not insert first annular arch, then first annular arch can not form the step with first communicating pipe, and the self-fluxing welds and makes the junction between them more level and more smooth, has reduced the dust accumulation, also more pleasing to the eye.

In one embodiment, an end surface of the first annular projection on a side facing the first communication pipe abuts against an end surface of the first communication pipe facing the valve body, and an inner diameter and an outer diameter of the first annular projection on an end facing the first communication pipe are respectively the same as an inner diameter and an outer diameter of the first communication pipe on an end facing the first annular projection.

So set up, can increase the welding area of first annular arch and first connecting pipe under the prerequisite that does not increase the material, make welding strength between them higher, connect more firmly.

In one embodiment, a third opening is formed in the valve body, a second annular bulge is formed in the valve body and surrounds the third opening, a valve assembly is connected to one side, far away from the valve body, of the second annular bulge, and the valve assembly is fixedly connected with the second annular bulge in a self-fluxing welding mode.

So set up, similar with first annular arch, reduced the processing technology and the cost that valve assembly and valve body are connected to make second annular arch more pleasing to the eye with being connected of valve assembly, reduce the dust accumulation.

In one embodiment, an end surface of the second annular projection on a side facing the valve assembly abuts an end surface of the valve assembly on a side facing the valve body, and an inner diameter and an outer diameter of the second annular projection on an end facing the valve assembly are respectively the same as an inner diameter and an outer diameter of the valve assembly on an end facing the second annular projection.

So set up, can increase the second annular bulge and the area of welding of valve assembly under the prerequisite that does not increase the material, make welding strength between them higher, connect more firmly.

In one embodiment, the valve assembly and the first communication pipe are made of stainless steel.

So set up, reduced the manufacturing cost of stop valve.

In one embodiment, the first annular protrusion is formed by flanging the valve body at the first opening; the valve body is provided with a third opening, the valve body is provided with a second annular bulge, the second annular bulge surrounds the third opening, and the second annular bulge is formed by flanging the second opening through the valve body.

In one embodiment, the valve body is further provided with a second opening, a valve seat is arranged in the second opening, the stop valve further comprises a second communicating pipe, one end of the second communicating pipe extends into the valve seat, and the outer wall of the second communicating pipe is fixedly connected with the inner wall of the valve seat.

In one embodiment, an inner diameter of an end of the valve seat close to the valve element is smaller than an inner diameter of an end of the valve seat far away from the valve element, so that a step is formed, and one end of the second communication pipe abuts against the step.

So set up, carry on spacingly through the structure of disk seat to the second communicating pipe, spacing intensity is high to need not additionally to set up the structure again and be connected with the second communicating pipe, reduced the processing cost.

In one embodiment, the valve body and the second communication pipe are both made of stainless steel, and the second communication pipe is welded and fixed to the valve seat through a brazing process.

So set up, the second is communicating pipe and the manufacturing cost of valve body is lower.

In one embodiment, a copper sleeve is arranged at one end of each of the first communicating pipe and the second communicating pipe, which is far away from the valve body.

So set up, be convenient for the welding of stop valve and external system pipeline.

Compared with the prior art, the stop valve provided by the utility model has the advantages that the first annular bulge is arranged in the circumferential direction of the first opening, the first communication pipe and the first annular bulge are fixed through self-melting welding, the inner diameter of the first annular bulge at the first opening is not required to be larger than the outer diameter of the first communication pipe, the inner wall of the first annular bulge is not required to be parallel to the pipe wall of the first communication pipe for the insertion of the first communication pipe, the welding strength can be met, the processing difficulty is reduced, and the cost is reduced; and, inside first communicating pipe did not insert first annular arch, then first annular arch can not form the step with first communicating pipe, and the self-fluxing welds and makes the junction between them more level and more smooth, has reduced the dust accumulation, also more pleasing to the eye.

Drawings

Fig. 1 is a sectional view of a stop valve provided by the present invention;

fig. 2 is a perspective view of the stop valve provided by the present invention.

The symbols in the drawings represent the following meanings:

100. a stop valve; 10. a valve body; 11. a first opening; 111. a first annular projection; 12. a second opening; 13. a third opening; 131. a second annular projection; 14. a first communication pipe; 15. a second communicating pipe; 16. an end cap; 161. a second thread segment; 17. a valve seat; 171. a valve port; 172. a step; 18. a copper sleeve; 20. a valve core; 21. an operation section; 22. a first groove; 221. a first seal member; 23. a boss; 24. a second groove; 241. a second seal member; 30. a valve assembly; 31. a housing; 32. a third seal.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-2, such a shut-off valve 100 is installed in a refrigeration system for enabling communication and cutoff of pipes.

The cut-off valve 100 includes a valve body 10 and a valve spool 20, and the valve spool 20 is connected to the valve body 10. The valve body 10 is hollow inside and is used for accommodating components such as a valve core 20 and the like; at least a portion of the valve spool 20 is disposed inside the valve body 10 and is movable axially along the valve body 10.

The valve body 10 is provided with a first opening 11 and a second opening 12. In the present embodiment, when the stop valve 100 is installed vertically as in the drawings of the specification, the first opening 11 and the second opening 12 are opened on the lower side and the right side of the valve body 10. One side of the first opening 11, which is far away from the valve body 10, is connected with a first communication pipe 14, and the first opening 11 is communicated with the outside through the first communication pipe 14; one side of the second opening 12, which is far away from the valve body 10, is connected with a second communication pipe 15, and the second opening 12 is communicated with the outside through the second communication pipe 15. The first communicating pipe 14 and the second communicating pipe 15 are respectively used as an inlet or an outlet of the medium. When the first communication pipe 14 is used as a medium inlet, the medium enters the stop valve 100 from the first communication pipe 14 and enters the valve body 10 through the first opening 11, and if the stop valve 100 is in an open state, the medium passes through the second opening 12 and flows out of the stop valve 100 through the second communication pipe 15; vice versa, the medium can also enter the valve body 10 from the second connection pipe 15 via the second opening 12 and then flow out of the shut-off valve 100 via the first opening 11 and the first connection pipe 14.

In this embodiment, the first communicating pipe 14 and the second communicating pipe 15 are both made of stainless steel, so that the cost is reduced. In other embodiments, the first communicating pipe 14 and the second communicating pipe 15 may also be made of red copper or the like.

An outer copper sleeve 18 is connected to one side of the first communication pipe 14 away from the valve body 10, so that the first communication pipe 14 can be welded to an external system pipeline. Specifically, the diameter of the outer copper sheath 18 is larger than the diameter of the first communication pipe 14, thereby facilitating welding of the two.

The valve body 10 is further provided with a third opening 13, the third opening 13 is arranged opposite to the first opening 11, and a valve assembly 30 is arranged at the third opening 13.

Be equipped with first annular protrusion 111 on the valve body 10, first annular protrusion 111 encircles first opening 11 and sets up, and one side that valve body 10 was kept away from to first annular protrusion 111 is fixed with first connecting pipe 14 through self-fluxing welded connection.

It can be understood that, by adopting the self-fluxing welding mode, because the welding strength is high, the processing requirement on the first annular protrusion 111 is lower, the inner diameter of the first annular protrusion 111 at the first opening 11 does not need to be larger than the outer diameter of the first communication pipe 14, and the inner wall of the first annular protrusion 111 does not need to be parallel to the pipe wall of the first communication pipe 14 for the insertion of the first communication pipe 14, so that the processing difficulty is reduced, and the cost is reduced; the self-fluxing welding enables the connection to be smoother, reduces dust accumulation and is more attractive.

The valve body 10 is provided with a second annular bulge 131, the second annular bulge 131 is arranged around the circumference of the third opening 13, and one side of the second annular bulge 131, which is far away from the valve body 10, is fixedly connected with the valve assembly 30 in a self-melting connection mode. The valve assembly 30 does not need to be inserted into the second annular bulge 131, the processing difficulty is reduced, meanwhile, the connection part is smoother due to self-fluxing welding, and corrosion caused by accumulation of dust and liquid is reduced.

Preferably, the first annular projection 111 is formed by flanging the valve body 10 at the first opening 11; the second annular projection 131 is formed by flanging the valve body 10 at the second opening 12. In the flanging process, the first annular bulge 111 and the second annular bulge 131 only need to be provided with surfaces to be abutted against the first communicating pipe 14 and the second communicating pipe 15, the flanging requirement is low, and the processing difficulty is reduced.

Further, an end surface of the first annular projection 111 on the side facing the first communication pipe 14 abuts an end surface of the first communication pipe 14 facing the valve body 10, and an inner diameter and an outer diameter of an end of the first annular projection 111 facing the first communication pipe 14 are respectively the same as an inner diameter and an outer diameter of a section of the first communication pipe 14 facing the first annular projection 111. So set up, can increase the welding area of first annular arch 111 and first connecting pipe 14 under the prerequisite that does not increase the material, make welding strength between them higher, connect more firmly.

The end surface of the second annular projection 131 on the side facing the valve assembly 30 abuts against the end surface of the valve assembly 30 on the side facing the valve body 10, and the inner diameter and the outer diameter of the end of the second annular projection 131 facing the valve assembly 30 are the same as the inner diameter and the outer diameter of the end of the valve assembly 30 facing the second annular projection 131, respectively. Similarly, the welding area of the second annular protrusion 131 and the valve assembly 30 is increased without increasing the material, so that the welding strength of the two is higher, and the connection is more stable.

Alternatively, the inner and outer diameters of the two parts may be different, and only a connection manner capable of realizing self-fluxing welding is required, and the inner and outer diameters are not limited to the same as those described in this embodiment.

The valve body 10 further comprises an end cover 16 and a valve seat 17, the end cover 16 is located at the topmost end of the valve body 10, the end cover 16 is in threaded fit with the valve core 20 to achieve axial movement of the valve core 20 to open and close the valve, and the end cover 16 is in fit with the valve core 20 and the valve body 10 to seal the valve body 10, so that impurities such as external dust and powder are prevented from entering the valve body 10 to affect the sealing performance of the on-off valve of the stop valve 100 and the purity of media entering the valve body 10, and other related functions of the stop valve 100 are prevented from being affected. The valve seat 17 is disposed in the second opening 12, and is used for abutting and matching with the valve core 20 to realize communication or isolation inside the valve body 10.

Alternatively, the end cap 16 may be provided inside the valve body 10, that is, the outer peripheral side of the end cap 16 abuts against the inner peripheral side of the valve body 10, and the inner peripheral side of the end cap 16 abuts against the outer peripheral side of the valve body 20, so that the end cap 16 and the valve body 20 are engaged with each other to seal the valve body 10. The position of the end cap 16 is not limited to the solution described in the present embodiment, and only the above-described function is required.

The valve seat 17 is opened with a valve port 171, and the valve port 171 is communicated with the second opening 12 to form a channel for medium to flow in or flow out. Preferably, in the present embodiment, the valve seat 17 is provided separately from the valve body 10, so as to reduce the difficulty of processing. Alternatively, in other embodiments, the valve seat 17 may be formed directly from the valve body 10.

One section of the second communicating pipe 15 extends into the valve seat 17, and the outer wall of the second communicating pipe 15 is fixedly connected with the inner wall of the valve seat 17 through the brazing process, so that the brazing welding firmness is enhanced.

The inner diameter of the valve seat 17 close to one end of the valve core 20 is smaller than the inner diameter of the valve seat 17 far away from one end of the valve core 20, so that a step 172 is formed, one end of the second communication pipe 15 is abutted to the step 172, the second communication pipe 15 is limited through the structure of the valve seat 17, the limiting strength is high, and no additional structure needs to be arranged to be connected with the second communication pipe 15, so that the processing cost is reduced.

Further, the valve body 10 is made of a stainless material, thereby reducing costs.

The valve body 20 is provided with an operation portion 21. The operating portion 21 protrudes from the upper end surface of the end cover 16, and is easy to machine and disassemble. The operation part 21 is provided with a hollow structure with an opening at the upper end, and a plurality of planes are uniformly distributed on the inner surface of the operation part 21 at intervals, so that the operation part can adapt to tools such as a hexagon socket wrench and the like. In other embodiments, the planes of the inner surface of the operation portion 21 may be arranged to be unevenly distributed to adapt to irregular wrenches.

The valve body 20 is driven by the operation portion 21 and rotates in synchronization with the operation portion 21. The outer peripheral side of the operating portion 21 has a first threaded section (not shown), and the inner surface of the end cap 16 is provided with a second threaded section 161 that mates with the first threaded section. In the working process, the operation part 21 is operated and rotated by an external machine or a tool, so that the first thread section is driven to rotate circumferentially, the first thread section is matched with the second thread section 161, the operation part 21 is driven to perform axial lifting motion, and the axial motion of the valve core 20 is realized.

The valve core 20 is further provided with a first groove 22, the first groove 22 circumferentially surrounds the outer peripheral side of the valve core 20, a first sealing member 221 is arranged in the first groove 22, the outer peripheral side of the first sealing member 221 circumferentially abuts against the inner wall of the valve body 10, and therefore the valve body 10 is sealed, and a medium cannot leak in the flowing process of the first opening 11 and the second opening 12.

The valve core 20 has a boss 23 and a second recess 24 at an end thereof adjacent to the valve port 171. The boss 23 has a cylindrical shape, one end connected to the valve spool 20, and the other end extending toward the valve port 171, for guiding the insertion of the valve spool 20 into the valve port 171. The second groove 24 is a circular groove and is arranged around the boss 23, and a notch of the second groove 24 is opened towards the valve seat 17.

A second sealing element 241 is arranged in the second groove 24, and the second sealing element 241 is also annular and is embedded in the second groove 24 and is in interference fit with the second groove 24. In the closed state of the shutoff valve 100, the second seal 241 can abut against the valve seat 17 and can seal the valve port 171.

When the shutoff valve 100 is closed, the valve body 20 moves toward the valve port 171, and finally the second sealing member 241 abuts against the valve seat 17 to isolate the second opening 12 and the second communication pipe 15 from the inside of the valve body 10. Preferably, the second sealing element 241 is made of red copper, so as to ensure the sealing performance between the second sealing element 241 and the valve port 171. In other embodiments, the second sealing element 241 may also be made of hard plastic or the like, which also ensures the sealing performance.

Further, the valve assembly 30 is connected to the second annular projection 131. In this embodiment, the valve assembly 30 is disposed opposite the first opening 11 as a charge air inlet or discharge air outlet for replenishing or discharging the medium to the entire refrigeration system. In other embodiments, the axis of the valve assembly 30 may also be arranged perpendicular to the axis of the first opening 11, i.e. the valve assembly 30 may also be arranged at other positions of the valve body 10.

The valve assembly 30 comprises a connecting body (not shown) which is connected to the second annular projection 131 as a passage for the medium into the valve body 10.

The valve assembly 30 further includes a valve core (not shown), a housing 31, and a third seal 32. The valve core is arranged in the connecting body, so that the interior of the valve body 10 can be communicated with or separated from the interior of the connecting body, and the housing 31 is sleeved on the outer peripheral side of the connecting body and used for protecting the valve core and preventing external impurities from entering; a third seal 32 is located between the housing 31 and the connecting body and cooperates with the housing 31 to seal the connecting body.

Specifically, an elastic member (not shown) is disposed at one end of the valve core, and when the valve core is not subjected to external pressure, the valve core is kept in a closed state, and at this time, the connecting body keeps a seal, and the inside of the valve body 10 is blocked from the outside. When the valve core is under pressure, the valve core extrudes the elastic piece and moves towards the direction close to the valve body 10, so that the plugging is removed, the interior of the valve body 10 is communicated with the interior of the connecting body, and a medium can enter the interior of the valve body 10 or flow out of the interior of the valve body 10. The elastic piece is used for resetting the valve core.

The utility model also provides a refrigerating system, including foretell stop valve 100, stop valve 100 is installed in refrigerating system's medium route to the truncation and the circulation of control route, and be used for supplementing the medium to refrigerating system.

In the operation process of the stop valve 100 of the present embodiment, when the stop valve 100 needs to be closed, the operation portion 21 on the top of the stop valve 100 is screwed, the operation portion 21 and the valve element 20 rotate synchronously, and the valve element 20 moves axially relative to the end cap 16 through the cooperation of the first threaded section and the second threaded section 161, so that the boss 23 at the bottom end of the valve element 20 is inserted into the valve port 171, and the second sealing member 241 abuts against the valve seat 17 to seal the second communication pipe 15, thereby achieving the cut-off between the second communication pipe 15 and the first communication pipe 14.

Compared with the prior art, the utility model provides a stop valve 100, through passing through self-fluxing welded fastening with first annular arch 111 and first connecting pipe 14, then the internal diameter of the first annular arch 111 of first opening 11 department need not to be greater than the external diameter of first connecting pipe 14, the inner wall of first annular arch 111 also need not to be parallel with the pipe wall of first connecting pipe 14 for first connecting pipe 14 inserts, has reduced the processing degree of difficulty, the cost is reduced; in addition, the first communicating pipe 14 does not need to be inserted into the first annular protrusion 111, so that the first annular protrusion 111 and the first communicating pipe 14 do not form a step, the joint of the first annular protrusion 111 and the first communicating pipe 14 is smoother due to self-fluxing welding, dust accumulation is reduced, and the appearance is more attractive.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A stop valve is characterized by comprising a valve body (10) and a valve core (20), wherein the valve core (20) is positioned in the valve body (10) and can move along the axial direction of the valve body (10) for opening and closing the stop valve;

be connected with first intercommunication pipe (14) on valve body (10), be equipped with on valve body (10) with first opening (11) of first intercommunication pipe (14) intercommunication, be equipped with the protruding (111) of first annular on valve body (10), the protruding (111) of first annular encircles first opening (11) set up, the protruding (111) of first annular is kept away from one side of valve body (10) with first intercommunication pipe (14) are through melting welded connection fixed certainly.

2. A shut-off valve according to claim 1, characterised in that the end surface of the first annular projection (111) on the side facing the first communication pipe (14) abuts the end surface of the first communication pipe (14) facing the valve body (10), the inner and outer diameters of the first annular projection (111) at the end facing the first communication pipe (14) being the same as the inner and outer diameters, respectively, of the first communication pipe (14) at the end facing the first annular projection (111).

3. The stop valve according to claim 1, characterized in that a third opening (13) is arranged on the valve body (10), a second annular bulge (131) is arranged on the valve body (10), the second annular bulge (131) is arranged around the third opening (13), a valve assembly (30) is connected to one side, away from the valve body (10), of the second annular bulge (131), and the valve assembly (30) and the second annular bulge (131) are fixedly connected in a self-fluxing welding manner.

4. A stop valve according to claim 3, wherein the end surface of the second annular projection (131) on the side facing the valve assembly (30) abuts the end surface of the valve assembly (30) on the side facing the valve body (10), the inner and outer diameters of the second annular projection (131) on the end facing the valve assembly (30) being the same as the inner and outer diameters, respectively, of the valve assembly (30) on the end facing the second annular projection (131).

5. A stop valve according to claim 3, wherein the valve assembly (30) and the first communication pipe (14) are both made of stainless steel.

6. A shut-off valve according to claim 1, characterised in that the first annular projection (111) is formed by flanging the valve body (10) at the first opening (11); the valve is characterized in that a third opening (13) is formed in the valve body (10), a second annular bulge (131) is arranged on the valve body (10), the second annular bulge (131) surrounds the third opening (13), and the second annular bulge (131) is formed by flanging the valve body (10) at the third opening (13).

7. The stop valve according to claim 1, characterized in that the valve body (10) is further provided with a second opening (12), a valve seat (17) is arranged in the second opening (12), the stop valve further comprises a second communicating pipe (15), one end of the second communicating pipe (15) extends into the valve seat (17), and the outer wall of the second communicating pipe (15) is fixedly connected with the inner wall of the valve seat (17).

8. The shut-off valve according to claim 7, characterized in that the inner diameter of the end of the valve seat (17) close to the valve element (20) is smaller than the inner diameter of the end of the valve seat (17) far from the valve element (20), so as to form a step (172), and the end of the second communication pipe (15) abuts against the step (172).

9. The shut-off valve according to claim 8, characterized in that said valve body (10) and said second communicating tube (15) are both made of stainless steel material, said second communicating tube (15) being welded and fixed to said valve seat (17) by means of a brazing process.

10. The shut-off valve according to claim 9, characterized in that the ends of the first and second communication pipes (14, 15) remote from the valve body (10) are provided with a copper jacket (18).

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