CN202561171U - High-precision adjustment valve - Google Patents
High-precision adjustment valve Download PDFInfo
- Publication number
- CN202561171U CN202561171U CN201220227903XU CN201220227903U CN202561171U CN 202561171 U CN202561171 U CN 202561171U CN 201220227903X U CN201220227903X U CN 201220227903XU CN 201220227903 U CN201220227903 U CN 201220227903U CN 202561171 U CN202561171 U CN 202561171U
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- valve
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- valve rod
- spool
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Abstract
The utility model discloses a high-precision adjustment valve which comprises a valve body with a fluid channel and an execution component connected with a connection bracket, wherein a valve core and a valve seat are arranged in the fluid channel; a valve cover is fixed at the top of the valve body; a valve rod penetrates through the valve cover; the valve core is connected to the lower end of the valve rod; a valve core guide device is arranged between the valve core and the valve body; a valve rod guide device and a valve rod sealing device are arranged between the valve rod and the valve cover; the execution component comprises a cylinder body; a membrane, a spring and a push rod are arranged in the cylinder body; one end of the push rod is connected with the membrane, and the other end of the push rod extends out of the cylinder body and is connected with the valve rod; and an air chamber is connected with an execution control device. During working, the valve core guide device and the valve rod sealing device can guarantee the motion coaxiality of the valve core and the valve rod, so that the flow adjustment accuracy is guaranteed; due to the valve rod sealing device, the sealing property between fluid media in the valve body and the external environment can be guaranteed, and dust and impurities can be prevented from falling into a joint of the valve rod and the valve cover; and therefore, the operation flexibility of the valve rod can be guaranteed.
Description
Technical field
The utility model relates to a kind of control valve, relates in particular to a kind of modulating valve that can accurately regulate rate-of flow.
Background technique
Modulating valve is one of widely used industrial process control instruments of industrial enterprise such as oil, chemical industry, electric power, metallurgy; Usually form by pneumatic actuator assembly and valve assembly two large divisions connection; Wherein the pneumatic actuator assembly is to be power source with pressurized air; Can receive the control signal of industrial automation control system through final controlling element; Control electromagnetic valve driving execution mechanism action is realized the switch motion or the proportion expression adjusting action of valve assembly part, reaches the purpose of various process parameters such as completion adjutage track media such as flow, pressure, temperature.
The modulating valve of conventional construction; The Placement of its valve rod and spool is simple, and its periphery does not have guide structure yet, when real work, causes easily to move disalignment between push rod, valve rod and the spool; Cause modulating valve control media flow inaccuracy, influenced the working life of modulating valve simultaneously.
Summary of the invention
The utility model technical problem to be solved provides a kind of rate-of flow and controls accurate highi degree of accuracy modulating valve.
For solving the problems of the technologies described above; The technological scheme of the utility model is: the highi degree of accuracy modulating valve, comprise the valve body that is provided with the fluid passage, and be fixedly connected with executive module through connecting support on the said valve body; Be provided with spool and valve seat in the said fluid passage; Said valve body roof anchorage has valve gap, passes said valve gap and is provided with valve rod, and said valve rod lower end connects said spool; Be provided with the spool guiding device between said spool and the said valve body, be provided with stem guiding device and valve rod sealing device between said valve rod and the said valve gap; Said executive module comprises cylinder body, is provided with diaphragm in the said cylinder body, and said diaphragm is isolated into air chamber and pressing chamber with said cylinder body, between said diaphragm and cylinder body, spring is installed in the said pressing chamber; Be provided with push rod in the said pressing chamber, said push rod one end connects said diaphragm and the other end stretches out said cylinder body and connect said valve rod, and said air chamber is connected with the execution control gear.
As optimized technical scheme, said spool guiding device comprises the valve cage that is provided with in the said fluid passage, and said spool slides and is located in the said valve cage, and said valve cage is provided with the through hole that is communicated with said fluid passage.
As optimized technical scheme, said spool guiding device comprises the valve cage that is fixed on the said spool Horizontal displacement of restriction in the said valve body, and said valve cage is provided with the through hole of the fluid passage that is communicated with said valve body.
As optimized technical scheme, the fluid passage of said valve body is the setting of " S " type.
As optimized technical scheme, said stem guiding device comprises the stem sleeve that is arranged in the said valve gap and is set in said valve rod periphery.
As optimized technical scheme; Said valve rod sealing device comprises the packing cavity that is arranged in the said valve gap; Be provided with pressure spring in the said packing cavity; Said pressure spring top is provided with filler retaining pad, filler spacer ring and filler pressure pad successively, and said filler keeps off between pad and the filler spacer ring and between filler spacer ring and the filler pressure pad and is filled with stuffing box packing respectively, and said filler pressure pad upper fixed has the filler gland.
As optimized technical scheme, said filler gland upper recess is provided with dustproof chamber, and said dustproof cavity inner sleeve is equipped with dust-proof cover, is provided with dust-proof seal ring between said dust-proof cover and the said filler gland.
As optimized technical scheme, be provided with contiguous block between said push rod and the said valve rod, said contiguous block is provided with the finger bar, and said finger boom end is provided with pointer, and said pointed is arranged on the stroke scale on the said connection support.
As improvement to technique scheme; Said execution control gear comprises the final controlling element that is fixed on the said connection support; Said contiguous block is provided with the swing arm bar that is connected with said final controlling element; Said final controlling element connection is arranged on the solenoid valve on the power gas source, and said solenoid valve is communicated with said air chamber through air pipe.
Owing to adopted technique scheme, the highi degree of accuracy modulating valve comprises the valve body that is provided with the fluid passage; Be fixedly connected with executive module through connecting support on the said valve body, be provided with spool and valve seat in the said fluid passage, said valve body roof anchorage has valve gap; Pass said valve gap and be provided with valve rod; Said valve rod lower end connects said spool, is provided with the spool guiding device between said spool and the said valve body, is provided with stem guiding device and valve rod sealing device between said valve rod and the said valve gap; Said executive module comprises cylinder body, is provided with diaphragm in the said cylinder body, and said diaphragm is isolated into air chamber and pressing chamber with said cylinder body, between said diaphragm and cylinder body, spring is installed in the said pressing chamber; Be provided with push rod in the said pressing chamber, said push rod one end connects said diaphragm and the other end stretches out said cylinder body and connect said valve rod, and said air chamber is connected with the execution control gear; The beneficial effect of the utility model is: spool guiding device and valve rod sealing device can guarantee the alignment of spool and stem movement when work; Thereby the accuracy that dependable flow is regulated; And valve rod sealing device not only can guarantee valve body inner fluid medium and extraneous sealing; Can also prevent that dust and impurity from falling into the joint of valve rod and valve gap, thus the sensitivity when guaranteeing the valve rod action.
Description of drawings
Fig. 1 is the utility model embodiment's a structural representation;
Fig. 2 is the enlarged diagram at A place among Fig. 1;
Among the figure: the 1-valve body; The 2-fluid passage; The 3-valve gap; The 4-valve rod; The 5-spool; The 6-valve cage; The 7-stem sleeve; The 8-packing cavity; The 9-pressure spring; 10-filler retaining pad; 11-filler spacer ring; 12-filler pressure pad; The 13-stuffing box packing; 14-filler gland; The 15-dust-proof cover; The 151-dust-proof seal ring; 16-connects support; The 17-cylinder body; The 18-diaphragm; The 19-spring; The 20-push rod; The 21-contiguous block; 22-refers to bar; The 23-pointer; 24-stroke scale.
Embodiment
Below in conjunction with accompanying drawing and embodiment, further set forth the utility model.In the detailed description below, some example embodiment of the utility model has only been described through the mode of explanation.Undoubtedly, those of ordinary skill in the art can recognize, under the situation of spirit that does not depart from the utility model and scope, can revise described embodiment with various mode.Therefore, accompanying drawing is illustrative with being described in essence, rather than is used to limit the protection domain of claim.
Shown in Fig. 1 and Fig. 2 are common; The highi degree of accuracy modulating valve comprises the valve body 1 that is provided with fluid passage 2, is fixedly connected with executive module through connecting support 16 on the said valve body 1; Be provided with spool 5 and valve seat in the said fluid passage 2; Said valve body 1 roof anchorage has valve gap 3, passes said valve gap 3 and is provided with valve rod 4, and said valve rod 4 lower ends connect said spool 5; Be provided with the spool guiding device between said spool 5 and the said valve body 1, be provided with stem guiding device and valve rod sealing device between said valve rod 4 and the said valve gap 3; Said spool guiding device comprises the valve cage 6 that is provided with in the said fluid passage 2, and said spool 5 slides and is located in the said valve cage 6, and said valve cage 6 is provided with the through hole that is communicated with said fluid passage 2.And the fluid passage 2 of said valve body 1 is the setting of " S " type, and flow resistance is little in valve body 1, negotiability is big for flowing medium.Said stem guiding device comprises the stem sleeve 7 that is arranged in the said valve gap 3 and is set in said valve rod 4 peripheries; The Horizontal displacement of spool 5 receives the restriction of valve cage 6 in the present embodiment; And the Horizontal displacement of valve rod 4 receives the restriction of stem sleeve 7; Guaranteeing the coaxial synchronism of modulating valve spool 5 and valve rod 4 when the work, thereby the stability during assurance modulating valve regulated fluid rate-of flow helps the protection to valve body simultaneously.
Said valve rod sealing device in the present embodiment comprises the packing cavity 8 that is arranged in the said valve gap 3; Be provided with pressure spring 9 in the said packing cavity 8; Said pressure spring 9 tops are provided with filler retaining pad 10, filler spacer ring 11 and filler pressure pad 12 successively, reach between filler spacer ring 11 and the filler pressure pad 12 between said filler retaining pad 10 and the filler spacer ring 11 and are filled with stuffing box packing 13 respectively, and said filler pressure pad 12 upper fixed have filler gland 14; Difference according to valve body inner fluid medium; Can sealing mediums such as greasing, inert gas be selected in stuffing box packing 13, realized valve body and extraneous isolating safely, the pressure spring 9 that stuffing box packing 13 belows are provided with is set to pressure spring; After stuffing box packing 13 long-time uses, can produce wearing and tearing; It is loosening to make stuffing box packing 13 inside thereby the gap generation occur, and pressure spring 9 can utilize the elasticity of himself, and filler pressure pad 12, filler spacer ring 11 and filler pressure pad 12 are pressed; Play the effect of automatic compensation packing seal property indirectly, leak outside thereby thoroughly stop flowing medium.Said filler gland 14 upper recess are provided with dustproof chamber; Said dustproof cavity inner sleeve is equipped with dust-proof cover 15; Be provided with dust-proof seal ring 151 between said dust-proof cover 15 and the said filler gland 14; Can prevent that dust, dirt from getting in the packing cavity 8, to guarantee the reliability of stuffing box packing 13 sealings, to guarantee the working life of valve body.
Said executive module comprises cylinder body 17, is provided with diaphragm 18 in the said cylinder body 17, and said diaphragm 18 is isolated into air chamber and pressing chamber with said cylinder body 17, between said diaphragm 18 and cylinder body 17, spring 19 is installed in the said pressing chamber; Be provided with push rod 20 in the said pressing chamber, said push rod 20 1 ends connect said diaphragm 18 and the other end stretches out said cylinder body 17 and connect said valve rod 4, and said air chamber is connected with the execution control gear.Be provided with contiguous block 21 between said push rod 20 and the said valve rod 4; Said contiguous block 21 is provided with and refers to bar 22; Said finger bar 22 ends are provided with pointer 23, and said pointer 23 points to and is arranged on the stroke scale 24 on the said connection support 16, is convenient to the stroke that the staff observes push rod 20 during use.
Said execution control gear comprises the final controlling element that is fixed on the said connection support 16, and said contiguous block 21 is provided with the swing arm bar that is connected with said final controlling element, and said final controlling element connection is arranged on the solenoid valve on the power gas source; Said solenoid valve is communicated with said air chamber through air pipe, and carrying out control gear is the content that those of ordinary skill is known in the present technique field, here repeats no more; For the modulating valve each several part clearly shows; Also do not show this part structure among Fig. 1, utilize the remote automatic control system to the final controlling element transfer control signal during work, final controlling element is through control electromagnetic valve action after the analysing and processing; The aeration quantity of change in air chamber; Move up and down the elastic force that changes spring 19 through diaphragm 18, and move up and down, thereby reach the purpose of regulating pipeline inner fluid rate-of flow through push rod 20 drive valve rods 4.
Normal temperature type, low form, high temperature modification valve cover structure can be set on the valve body of the utility model, and satisfying the delivery requirements of different fluid medium, and executive module also can be equipped with electric actuator, uses more extensive.The utlity model has the characteristics that the modulating valve droop loss is little, flow is big, adjustable extent is wide, the rating curve precision is high, and dynamic stability is good, noise is low, the High Pressure Difference fluid of suitable control all temps uses.
More than show and described the advantage of basic principle, major character and the utility model of the utility model.The technician of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; Under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection domain to be defined by appending claims and equivalent thereof.
Claims (8)
1. the highi degree of accuracy modulating valve comprises the valve body that is provided with the fluid passage, is fixedly connected with executive module through connecting support on the said valve body, it is characterized in that:
Be provided with spool and valve seat in the said fluid passage; Said valve body roof anchorage has valve gap; Pass said valve gap and be provided with valve rod; Said valve rod lower end connects said spool, is provided with the spool guiding device between said spool and the said valve body, is provided with stem guiding device and valve rod sealing device between said valve rod and the said valve gap;
Said executive module comprises cylinder body, is provided with diaphragm in the said cylinder body, and said diaphragm is isolated into air chamber and pressing chamber with said cylinder body, between said diaphragm and cylinder body, spring is installed in the said pressing chamber; Be provided with push rod in the said pressing chamber, said push rod one end connects said diaphragm and the other end stretches out said cylinder body and connect said valve rod, and said air chamber is connected with the execution control gear.
2. highi degree of accuracy modulating valve as claimed in claim 1; It is characterized in that: said spool guiding device comprises the valve cage that is provided with in the said fluid passage; Said spool slides and is located in the said valve cage, and said valve cage is provided with the through hole that is communicated with said fluid passage.
3. highi degree of accuracy modulating valve as claimed in claim 2 is characterized in that: the fluid passage of said valve body is the setting of " S " type.
4. highi degree of accuracy modulating valve as claimed in claim 1 is characterized in that: said stem guiding device comprises the stem sleeve that is arranged in the said valve gap and is set in said valve rod periphery.
5. highi degree of accuracy modulating valve as claimed in claim 4; It is characterized in that: said valve rod sealing device comprises the packing cavity that is arranged in the said valve gap; Be provided with pressure spring in the said packing cavity; Said pressure spring top is provided with filler retaining pad, filler spacer ring and filler pressure pad successively, and said filler keeps off between pad and the filler spacer ring and between filler spacer ring and the filler pressure pad and is filled with stuffing box packing respectively, and said filler pressure pad upper fixed has the filler gland.
6. highi degree of accuracy modulating valve as claimed in claim 5 is characterized in that: said filler gland upper recess is provided with dustproof chamber, and said dustproof cavity inner sleeve is equipped with dust-proof cover, is provided with dust-proof seal ring between said dust-proof cover and the said filler gland.
7. like the described highi degree of accuracy modulating valve of the arbitrary claim of claim 1 to 6; It is characterized in that: be provided with contiguous block between said push rod and the said valve rod; Said contiguous block is provided with the finger bar, and said finger boom end is provided with pointer, and said pointed is arranged on the stroke scale on the said connection support.
8. highi degree of accuracy modulating valve as claimed in claim 7; It is characterized in that: said execution control gear comprises the final controlling element that is fixed on the said connection support; Said contiguous block is provided with the swing arm bar that is connected with said final controlling element; Said final controlling element connection is arranged on the solenoid valve on the power gas source, and said solenoid valve is communicated with said air chamber through air pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220227903XU CN202561171U (en) | 2012-05-21 | 2012-05-21 | High-precision adjustment valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220227903XU CN202561171U (en) | 2012-05-21 | 2012-05-21 | High-precision adjustment valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202561171U true CN202561171U (en) | 2012-11-28 |
Family
ID=47210830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220227903XU Expired - Fee Related CN202561171U (en) | 2012-05-21 | 2012-05-21 | High-precision adjustment valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202561171U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534133A (en) * | 2014-12-18 | 2015-04-22 | 烟台正大热力设备有限公司 | Constant-pressure current stabilization interrupter and high-rise heating system |
-
2012
- 2012-05-21 CN CN201220227903XU patent/CN202561171U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534133A (en) * | 2014-12-18 | 2015-04-22 | 烟台正大热力设备有限公司 | Constant-pressure current stabilization interrupter and high-rise heating system |
| CN104534133B (en) * | 2014-12-18 | 2016-12-07 | 烟台正大热力设备有限公司 | A kind of level pressure current stabilization block device and Heating System of High Residential Buildings |
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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: 20121128 Termination date: 20150521 |
|
| EXPY | Termination of patent right or utility model |