CN202914833U - Pretightening force adjusting structure of expansion valve - Google Patents
Pretightening force adjusting structure of expansion valve Download PDFInfo
- Publication number
- CN202914833U CN202914833U CN 201220556673 CN201220556673U CN202914833U CN 202914833 U CN202914833 U CN 202914833U CN 201220556673 CN201220556673 CN 201220556673 CN 201220556673 U CN201220556673 U CN 201220556673U CN 202914833 U CN202914833 U CN 202914833U
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- pretightening force
- expansion valve
- valve
- adjustment seat
- seat
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Abstract
The utility model provides a pretightening force adjusting structure of an expansion valve and belongs to the valve technical field. The pretightening force adjusting structure of the expansion valve solves the problems that an adjusting seat of an existing expansion valve is permanently affected by elasticity of a spring, so that the expansion valve is easy to fall from a valve body and thereby causing leakage of refrigerant. The pretightening force adjusting structure of the expansion valve comprises the adjusting seat which is fixedly connected with the tail portion of the valve body, an adjusting bolt which can enable the spring to compress and stretch is arranged in the adjusting seat, an end lid is connected with the tail portion of the adjusting seat, and a throttle structure which can reduce motion of the valve core is arranged between the valve core and the valve seat. After arranging the end lid at the tail portion, the pretightening force adjusting structure of the expansion valve enables the connection between the adjusting bolt and the adjusting seat to be more fixed, and seal effect of the valve body is also improved.
Description
Technical field
The utility model belongs to valve technology field, relates to the pretightening force regulation structure of a kind of expansion valve, particularly a kind of expansion valve.
Background technique
Chiller plant mainly is comprised of four large parts: compressor, condenser, vaporizer and expansion valve.Compressor is compressed into refrigerant the gas of high pressure, high temperature in the time of cooling system, the gas of high pressure, high temperature by condenser to the environment heat release, then become the refrigerant liquid of low-pressure low-temperature through expansion valve, the gas that the heat that absorbs again the room in the vaporizer becomes low pressure, low temperature enters compressor, be compressed into again the gas of High Temperature High Pressure, so form a circulation, just can stablize and freeze.Four-way valve commutation when heating, opposite when making intrasystem refrigerant flow to refrigeration, just become from environment and absorb heat, to the room heat release.
The effect of expansion valve is reducing pressure by regulating flow and the degree of superheat of regulating refrigeration system and refrigerant circulation, and expansion valve mainly is comprised of spool, valve body, spring, and refrigeration agent need to be pushed spool open could pass through spring by compression.In order to change the influx of refrigeration agent under same pressure difference, the pretightening force that pretightening force controlling mechanism changes spring is set usually.
A kind of heating power expansion valve [patent No.: 201010185044.8] such as the Chinese patent announcement, comprise valve body, this valve body has being used for valve chamber that the high pressure refrigerant flows into and flowing out and the low voltage side path that low pressure refrigerant flows out that is used for by valve opening from valve chamber by the high pressure side path; Also comprise the spherical spool that is arranged on the valve opening upstream side; Be positioned at the temperature-sensitive drive portion that is used for driving the drive link that spool moves to valve opening position of valve body upper end; And be configured in the valve chamber and with spool to the compression helical spring that closes the valve direction and promote; Be arranged on the interior adjustment seat that is used for regulating the compression helical spring pretightening force of valve chamber of valve body; Regulate the cold medium flux of the valve opening of flowing through by spool; Adjustment seat has and the contacted O shape circle of the internal surface of valve chamber, and O shape circle is assemblied in the annular recessed portion set on the outer circumferential face of described adjustment seat, and described annular recessed portion is made of the different wall section of thickness simultaneously.The present invention can realize low cost and lightweight, and can prevent coming off of O shape circle.But the adjustment seat of this heating power expansion valve is subjected to the elastic force effect of spring all the time, deviates from from valve body easily, causes the leakage of refrigerant.
Summary of the invention
The purpose of this utility model is to have the problems referred to above for existing technology, has proposed the pretightening force regulation structure of the expansion valve of a kind of sound construction, good sealing effect.
The purpose of this utility model can realize by following technical proposal: a kind of pretightening force regulation structure of expansion valve, expansion valve comprises valve body, is fixed on valve seat, the spool in the valve body and spool is had to the spring of valve seat mobile trend, it is characterized in that, the pretightening force regulation structure of this expansion valve comprises the adjustment seat that is connected in the valve body afterbody, be provided with the adjusting screw that can make spring-compressed or stretching, extension in the described adjustment seat, described adjustment seat afterbody is connected with end cap, is provided with the orifice structure that can reduce valve core movement between described spool and the valve seat.
The elastic force of spring is resisted against on the valve seat spool, after in refrigeration agent enters into valve body, when the valve import with outlet pressure is poor when acquiring a certain degree, pressure difference is greater than the elastic force of spring, spool is open, spring by compression, refrigeration agent is discharged from the outlet of valve, the pressure difference of valve import and outlet diminishes, and reaches gradually balance.After orifice structure is set, when refrigerant flow is less, can from orifice structure, pass through, reduce the motion of spool and spring.Adjusting screw is used for the pretightening force of Regulation spring, according to the pretightening force of indoor size adjustment spring, changes the pressure difference of expansion valve and the ratio of flow.Adjusting screw also be used for to be stopped up the afterbody of valve body, and after afterbody arranged end cap, so that adjusting screw is connected with adjustment seat is more firm, the sealing effect of valve body also was improved.
In the pretightening force regulation structure of above-mentioned expansion valve, described adjusting screw is threadedly connected in the adjustment seat, and an end and the adjusting screw of described spring lean, and the other end and spool lean, and described adjusting screw afterbody offers hexagon ring.After opening end cap, available hexagon wrench inserts auxiliary adjustment screw rotation in the hexagon ring, and adjusting screw relative adjustment seat rotates, thereby pushes or pull-off spring, realizes the purpose of Regulation spring pressure.
In the pretightening force regulation structure of above-mentioned expansion valve, described orifice structure comprises the annular cavity that is opened in the valve seat and three circulation passage that are opened in the spool, described three circulation passage, one end can be connected with annular cavity, the other end can be connected with the outlet of valve body, also have an end can with the intracavity inter-connection of valve body, also offer the throttling pore that is communicated with annular cavity and valve body import on the described valve seat.When refrigeration agent was less, spool was motionless, and refrigeration agent enters in the annular cavity from throttling pore, then the outlet of valve body; The inner chamber that the fraction refrigeration agent enters into valve body forms pressure, and reasonable buffer function is arranged when spool is lifted off a seat, and prevents that spring from producing vibration, reduces the noise of spring.
In the pretightening force regulation structure of above-mentioned expansion valve, offer annular groove one on the described adjusting screw, be provided with seal ring in the described annular groove one.Seal ring is set, has improved the sealing effect between adjusting screw and the adjustment seat, prevent that refrigeration agent from leaking from the valve body afterbody.
In the pretightening force regulation structure of above-mentioned expansion valve, has the position-limited lever that penetrates spring on the described adjusting screw.Position-limited lever penetrates in the spring, and the circuit oscillation amplitude of spring tails off, and can prevent effectively that spring from producing vibration.
In the pretightening force regulation structure of above-mentioned expansion valve, the port of described adjustment seat is threaded with end cap.After regulating adjusting screw, end cap is threaded in the adjustment seat port, prevents that adjusting screw from coming off.
As another kind of scheme, in the pretightening force regulation structure of above-mentioned expansion valve, the port of described adjustment seat and end cap riveting.Riveting is more firm, good airproof performance, but be not easy assembling and dismounting.
As another kind of scheme, in the pretightening force regulation structure of above-mentioned expansion valve, the port of described adjustment seat has annular protrusion, described end cap inboard offers annular groove two, described annular protrusion can buckle in the annular groove two and adjustment seat afterbody and end cap are fastened, and described end cap inner chamber also is provided with the hexagon prism that matches with the hexagon ring of adjusting screw.Have hexagon prism on the end cap, behind end cap and adjustment seat fastening, hexagon prism is also along with inserting in the hexagon ring; Because the matching relationship of annular protrusion and annular groove two, but end cap relative adjustment seat rotate and do not break away from, hexagon prism also drives adjusting screw and rotates in rotation process, reaches the purpose of Regulation spring pretightening force.This scheme just can be rotated adjusting screw so that need not open end cap, and is convenient and swift, also can regulate in expansion valve work.
In the pretightening force regulation structure of above-mentioned expansion valve, described adjustment seat and valve body welding are connected.Adjustment seat is welded on the valve body, is connected firmly good airproof performance.
In the pretightening force regulation structure of above-mentioned expansion valve, described adjustment seat is connected with valve body screw thread.Be threaded, easy for installation, be convenient to maintenance and replacing.
Compared with prior art, the pretightening force regulation structure of this expansion valve has the following advantages:
1. the adjustment seat afterbody is connected with end cap, adjusting screw is enclosed in the adjustment seat, sound construction, good sealing effect.
2. have the position-limited lever that penetrates spring on the adjusting screw, after position-limited lever penetrated spring, the circuit oscillation amplitude in the time of can reducing telescopic spring prevented that effectively spring from producing vibration.
3. end cap itself has hexagon prism, need not dismantle end cap and just can rotate adjusting screw, reaches the purpose of Regulation spring.
Description of drawings
Fig. 1 is embodiment one structural representation.
Fig. 2 makes embodiment two structural representation.
Fig. 3 is embodiment three structural representation.
Fig. 4 is the structural representation of embodiment one adjusting screw.
Fig. 5 is the structural representation of embodiment three adjustment seat.
Among the figure, 1, valve body; 2, spool; 2a, three circulation passage; 3, valve seat; 3a, annular cavity; 3b, throttling pore; 4, spring; 5, adjustment seat; 5a, annular protrusion; 6, adjusting screw; 6a, hexagon ring; 6b, annular groove one; 6c, position-limited lever; 7, end cap; 7a, hexagon prism; 7b, annular groove two; 8, seal ring.
Embodiment
Below be specific embodiment of the utility model and by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.
Embodiment one
As shown in Figure 1, expansion valve comprises valve body 1, is fixed on valve seat 3, the spool 2 in the valve body 1 and spool 2 is had to the spring 4 of valve seat 3 mobile trends.The pretightening force regulation structure of this expansion valve comprises the adjustment seat 5 that is connected in valve body 1 afterbody, is provided with the adjusting screw 6 that can make spring 4 compressions or stretch in the adjustment seat 5.Adjustment seat 5 afterbodys are connected with end cap 7, are provided with the orifice structure that can reduce spool 2 motions between spool 2 and the valve seat 3.
Specifically, such as Fig. 1, shown in Figure 4, orifice structure comprises the annular cavity 3a that is opened in the valve seat 3 and the three circulation passage 2a that are opened in the spool 2, three circulation passage 2a, one end can be connected with annular cavity 3a, the other end can be connected with the outlet of valve body 1, also have an end can with the intracavity inter-connection of valve body 1, also offer the throttling pore 3b that is communicated with annular cavity 3a and valve body 1 import on the valve seat 3.Adjusting screw 6 is threadedly connected in the adjustment seat 5, and an end and the adjusting screw 6 of spring 4 lean, and the other end and spool 2 lean, and adjusting screw 6 afterbodys offer hexagon ring 6a.Offer annular groove one 6b on the adjusting screw 6, be provided with seal ring 8 in annular groove one 6b, improve the sealing effect of valve body 1 afterbody.Have the position-limited lever 6c that penetrates spring 4 on the adjusting screw 6, spring 4 is not easy circuit oscillation when flexible.
The port of adjustment seat 5 and end cap 7 are threaded togather, and adjustment seat 5 another port and valve body 1 welding are connected.When need regulating, turn on disconnection, practical hexagon wrench is inserted in the hexagon ring 6a of adjusting screw 6 afterbodys, adjusts adjusting screw 6 according to the actual conditions needs and advances or retreat, and reaches the purpose of extruding or pull-off spring 4; After adjusting, again cover the port that end cap 7 is shut adjustment seat 5.
Embodiment two
As shown in Figure 2, embodiment two and embodiment's one structure basic simlarity, difference is that the port of adjustment seat 5 and end cap 7 pass through riveting together, adjustment seat 5 another port are threaded with valve body 1.
Embodiment three
As shown in Figure 3, embodiment three adjustment seat 5 ports have annular protrusion 5a, end cap 7 inboards offer annular groove two 7b, annular protrusion 5a can buckle among annular groove two 7b and adjustment seat 5 afterbodys and end cap 7 are fastened, and end cap 7 inner chambers are also established the hexagon prism 7a that matches with the hexagon ring 6a of adjusting screw 6.Can just can adjust without inner hexagon spanner the position of adjusting screw 6, save the step of dismounting end cap 7, convenient and swift.During spring 4 pretightening force, directly rotary end cover 7 drives adjusting screw 6 by hexagon prism 7a and rotates together during adjustment, and the purpose of realization Regulation spring 4 pretightening forces also can be regulated when expansion valve is worked.
Specific embodiment described herein only is to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Although this paper has more used the terms such as valve body 1, spool 2, three circulation passage 2a, valve seat 3, annular cavity 3a, throttling pore 3b, spring 4, adjustment seat 5, annular protrusion 5a, adjusting screw 6, hexagon ring 6a, annular groove one 6b, position-limited lever 6c, end cap 7, hexagon prism 7a, annular groove two 7b, seal ring 8, do not get rid of the possibility of using other term.Using these terms only is in order to describe more easily and explain essence of the present utility model; They are construed to any additional restriction all is contrary with the utility model spirit.
Claims (10)
1. the pretightening force regulation structure of an expansion valve, expansion valve comprises valve body (1), be fixed on the valve seat (3) in the valve body (1), spool (2) and spool (2) is had to the spring (4) of valve seat (3) mobile trend, it is characterized in that, the pretightening force regulation structure of this expansion valve comprises the adjustment seat (5) that is connected in valve body (1) afterbody, be provided with the adjusting screw (6) that can make spring (4) compression or stretch in the described adjustment seat (5), described adjustment seat (5) afterbody is connected with end cap (7), is provided with the orifice structure that can reduce spool (2) motion between described spool (2) and the valve seat (3).
2. the pretightening force regulation structure of expansion valve according to claim 1, it is characterized in that, described adjusting screw (6) is threadedly connected in the adjustment seat (5), one end of described spring (4) and adjusting screw (6) lean, the other end and spool (2) lean, and described adjusting screw (6) afterbody offers hexagon ring (6a).
3. the pretightening force regulation structure of expansion valve according to claim 2, it is characterized in that, described orifice structure comprises and is opened in the annular cavity (3a) in the valve seat (3) and is opened in interior three circulation passage (2a) of spool (2), described three circulation passage (2a) end can be connected with annular cavity (3a), the other end can be connected with the outlet of valve body (1), also have an end can with the intracavity inter-connection of valve body (1), also offer the throttling pore (3b) that is communicated with annular cavity (3a) and valve body (1) import on the described valve seat (3).
4. the pretightening force regulation structure of expansion valve according to claim 3 is characterized in that, offers annular groove one (6b) on the described adjusting screw (6), is provided with seal ring (8) in the described annular groove one (6b).
5. according to claim 1 and 2 or the pretightening force regulation structure of 3 or 4 described expansion valves, it is characterized in that having the position-limited lever (6c) that penetrates spring (4) on the described adjusting screw (6).
6. the pretightening force regulation structure of expansion valve according to claim 5 is characterized in that, the port of described adjustment seat (5) is threaded with end cap (7).
7. the pretightening force regulation structure of expansion valve according to claim 5 is characterized in that, the port of described adjustment seat (5) and end cap (7) riveting.
8. the pretightening force regulation structure of expansion valve according to claim 5, it is characterized in that, the port of described adjustment seat (5) has annular protrusion (5a), described end cap (7) inboard offers annular groove two (7b), described annular protrusion (5a) can buckle in the annular groove two (7b) and adjustment seat (5) afterbody and end cap (7) are fastened, and described end cap (7) inner chamber also is provided with the hexagon prism (7a) that matches with the hexagon ring (6a) of adjusting screw (6).
9. the pretightening force regulation structure of expansion valve according to claim 6 is characterized in that, described adjustment seat (5) is connected with valve body (1) welding.
10. the pretightening force regulation structure of expansion valve according to claim 6 is characterized in that, described adjustment seat (5) is threaded with valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220556673 CN202914833U (en) | 2012-10-26 | 2012-10-26 | Pretightening force adjusting structure of expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220556673 CN202914833U (en) | 2012-10-26 | 2012-10-26 | Pretightening force adjusting structure of expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202914833U true CN202914833U (en) | 2013-05-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220556673 Expired - Fee Related CN202914833U (en) | 2012-10-26 | 2012-10-26 | Pretightening force adjusting structure of expansion valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN202914833U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106133420A (en) * | 2014-04-21 | 2016-11-16 | 株式会社鹭宫制作所 | Throttling arrangement |
| CN107246593A (en) * | 2017-08-11 | 2017-10-13 | 上海小糸车灯有限公司 | Bulb light regulating bolt with self sealss and its fit structure with lamp body |
| US10240830B2 (en) | 2013-07-04 | 2019-03-26 | Danfoss A/S | Expansion valve comprising a stop element |
| US10274236B2 (en) | 2013-07-04 | 2019-04-30 | Danfoss A/S | Expansion valve with a two-step variable orifice area |
| US10281181B2 (en) | 2013-07-04 | 2019-05-07 | Danfoss A/S | Expansion valve with a variable orifice area |
| CN111136209A (en) * | 2019-10-29 | 2020-05-12 | 宁波蓝圣智能科技有限公司 | Servo electric automatic riveting machine |
-
2012
- 2012-10-26 CN CN 201220556673 patent/CN202914833U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10240830B2 (en) | 2013-07-04 | 2019-03-26 | Danfoss A/S | Expansion valve comprising a stop element |
| US10274236B2 (en) | 2013-07-04 | 2019-04-30 | Danfoss A/S | Expansion valve with a two-step variable orifice area |
| US10281181B2 (en) | 2013-07-04 | 2019-05-07 | Danfoss A/S | Expansion valve with a variable orifice area |
| CN106133420A (en) * | 2014-04-21 | 2016-11-16 | 株式会社鹭宫制作所 | Throttling arrangement |
| US10054343B2 (en) | 2014-04-21 | 2018-08-21 | Kabushiki Kaisha Saginomiya Seisakusho | Throttle device |
| CN106133420B (en) * | 2014-04-21 | 2018-11-13 | 株式会社鹭宫制作所 | Throttling set |
| CN107246593A (en) * | 2017-08-11 | 2017-10-13 | 上海小糸车灯有限公司 | Bulb light regulating bolt with self sealss and its fit structure with lamp body |
| CN111136209A (en) * | 2019-10-29 | 2020-05-12 | 宁波蓝圣智能科技有限公司 | Servo electric automatic riveting machine |
| CN111136209B (en) * | 2019-10-29 | 2021-11-16 | 宁波蓝圣智能科技有限公司 | Servo electric automatic riveting machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130501 Termination date: 20191026 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |