CN202756681U - Constant pressure pin valve - Google Patents
Constant pressure pin valve Download PDFInfo
- Publication number
- CN202756681U CN202756681U CN 201220293422 CN201220293422U CN202756681U CN 202756681 U CN202756681 U CN 202756681U CN 201220293422 CN201220293422 CN 201220293422 CN 201220293422 U CN201220293422 U CN 201220293422U CN 202756681 U CN202756681 U CN 202756681U
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- Prior art keywords
- valve
- valve body
- spool
- hole
- passage
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- Withdrawn - After Issue
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Abstract
The utility model relates to a valve mechanism which is used for fluid quantitive injection in chemical equipment, in particular to a constant pressure pin valve. The constant pressure pin valve comprises a pin valve seat which is composed of an upper valve body and a lower valve body, and a feeding channel and a feeding back channel which are arranged horizontally are respectively arranged inside the upper valve body and the lower valve body. At least one valve hole which is longitudinally arranged and communicates the feeding channel and the feeding back channel is arranged inside the upper valve body and the lower valve body, and a valve core which can move up and down is arranged inside the valve hole. The portion of the valve hole in the upper end face of the lower valve body is provided with an inner cone face, and the middle portion of the valve core is provided with an outer cone face which is matched with the inner cone face. The upper end of the valve hole is provided with a spraying hole which leads to the outside of the upper valve body, the upper end of the valve core is matched with the spraying hole through the cone faces to open or close the spraying hole, and the lower end of the valve core extends out of the lower valve body and is connected with a driving device. After the structure is used, the conversion process of an injection position and a circulating position influences little to fluid pressure, spraying pressure is stable, and spraying flow precision is high.
Description
Technical field
The utility model relates to a kind of valve mechanism for the injection of chemical industry equipment fluid quantitative, specifically a kind of constant voltage needle-valve.
Background technique
In chemical industry equipment, be used in the pressure-regulating device with the reaction-ure fluid quantitative injection, valve opens, the precision of closing conversion plays vital effect to the effect of spraying, particularly the associativity problem is the key factor of the effect of impact injection between the valve of pressure-regulating device and the hole wall, the valve of traditional pressure-regulating device generally all is comprised of conical valve and ball valve etc., adopt these valves owing to have obstructed dead point in the moment of fluid reversing between valve core channel and the valve body, particularly when the switching from rotation bit to the injection position, can produce certain pressure surge and changes in flow rate, make thus jeting effect be subject to impact.
Summary of the invention
The technical problems to be solved in the utility model provides and a kind ofly can effectively reduce the pressure surge that produces and the constant voltage needle-valve of changes in flow rate when rotation bit is switched to injection position.
In order to solve the problems of the technologies described above, constant voltage needle-valve of the present utility model comprises the pintle valve seat that is comprised of upper valve body and lower valve body, and feeding-passage and the feed back passage of cross setting arranged respectively in upper valve body and the lower valve body; Also has a valve opening that runs through feeding-passage and feed back passage that vertically arranges in upper valve body and the lower valve body at least, be provided with the spool that can move up and down in the valve opening, the valve opening place of lower valve body upper-end surface is provided with inner conical surface, and the middle part of spool is provided with one section male cone (strobilus masculinus) that adapts with described inner conical surface; The valve opening upper end is connected with leads to the outer spray-hole of upper valve body, passes through cone match between spool upper end and the spray-hole, to open or close spray-hole; Described spool moves up and when closing spray-hole, above-mentioned inner conical surface separates with male cone (strobilus masculinus) makes feeding-passage and feed back channel connection, and be rotation bit this moment; Described spool moves down and when opening spray-hole, and above-mentioned inner conical surface is combined with male cone (strobilus masculinus) and is closed runner between feeding-passage and the feed back passage, is the injection position this moment; Valve opening on spool hypomere and the lower valve body seals by seal ring, and the spool lower end is stretched out lower valve body and is connected with drive unit.
The needle that axially runs through the center spool through hole is set on the described spool, and the needle lower end is connected with the spool lower end with locking nut by the one stage adjust screw rod, and the needle upper end is for taper shape and stretch out spool; Effective injection sectional area of the position-adjustable spray-hole of axial adjustment and spray-hole, thus reach the effect of adjusting jet pressure.
Described drive unit is cylinder, and the piston rod of cylinder is connected with spool and is with movable valve plug.
Be provided with spring in the described cylinder, described spring is pressed between cylinder interior the piston bottom surface and cylinder bottom.
Described cylinder bottom is connected with a fastening screw, and fastening screw can upwards screw in and withstand the piston bottom surface in the cylinder.
After adopting above-mentioned structure, utilize the movement of needle-valve to open and close spray-hole, open and close sensitivity, and there is not buildup, make injection position and the fluid passage of rotation bit transfer process spool and valve body not have dead point fluid pressure impact less, make jet pressure stable, the injection flow precision is high; When adopting cylinder as drive unit, by being arranged on spring or the fastening screw in the cylinder, spray-hole keeps closing the material from leakage that produces when avoiding shutting down under the depressurization phase so that shut down.
Description of drawings
Fig. 1 is the first example structure schematic representation of the utility model constant voltage needle-valve;
Fig. 2 is the second example structure schematic representation of the utility model constant voltage needle-valve;
Fig. 3 is the 3rd example structure schematic representation of the utility model constant voltage needle-valve.
Embodiment
Below in conjunction with the drawings and specific embodiments, constant voltage needle-valve of the present utility model is described in further detail.
Embodiment one:
As shown in Figure 2, constant voltage needle-valve of the present utility model, comprise the pintle valve seat 3 that is formed by upper valve body 1 and lower valve body 2, upper valve body 1 and lower valve body 2 interior feeding-passage 4 and the feed back passages 5 that cross setting is arranged respectively, a valve opening 6 that runs through feeding-passage 4 and feed back passage 5 that vertically arranges is arranged in upper valve body 1 and the lower valve body 2, be provided with spool 7 in the valve opening 6, spool 7 peripheries are provided with the seal ring 14 that the valve opening with lower valve body 2 seals, the valve opening place of lower valve body 1 upper-end surface is provided with inner conical surface, the middle part of spool 7 is provided with one section male cone (strobilus masculinus) 8 that adapts with described inner conical surface, the center of spool 7 is provided with the needle 9 that a needle point can open or close spray-hole 11 on the upper valve body, the bottom of needle 9 is provided with one section pressure adjusting screw 17, pressure adjusting screw 17 is installed in lower valve body 2 bottoms by locking nut 18, spool 7 lower ends be connected with drive unit 10 and under drive unit drives on, lower movement; Drive unit 10 is a cylinder, and the piston rod 12 of cylinder is connected to lower valve core 7, is provided with spring 15 in the cylinder 10, and spring 15 is pressed between the piston bottom surface and cylinder bottom in the cylinder 10.
Embodiment two:
As shown in Figure 1, this embodiment and embodiment's one difference is by the spring 15 in fastening screw 16 alternate embodiments one that are arranged on cylinder bottom, when equipment downtime by artificial precession fastening screw, clamping piston.
Embodiment three:
As shown in Figure 3, this embodiment and embodiment's one difference is, the valve opening 6 between feeding-passage and the feed back passage is provided with two, and corresponding spool 7, needle 9 and drive unit 10 also are provided with two groups.
Claims (5)
1. constant voltage needle-valve, it is characterized in that: it comprises the pintle valve seat (3) that is comprised of upper valve body (1) and lower valve body (2), and feeding-passage (4) and the feed back passage (5) of cross setting arranged respectively in upper valve body (1) and the lower valve body (2); Also has a valve opening (6) that runs through feeding-passage (4) and feed back passage (5) that vertically arranges in upper valve body and the lower valve body at least, be provided with the spool (7) that can move up and down in the valve opening, the valve opening (6) of lower valve body upper-end surface locates to be provided with inner conical surface, and the middle part of spool is provided with one section male cone (strobilus masculinus) that adapts with described inner conical surface (8); The valve opening upper end is provided with leads to the outer spray-hole (11) of upper valve body, passes through cone match between spool (7) upper end and the spray-hole (11), to open or close spray-hole; Described spool (7) moves up and when closing spray-hole (11), above-mentioned inner conical surface separates with male cone (strobilus masculinus) (8) is communicated with feeding-passage (4) and feed back passage (5); Described spool moves down and when opening spray-hole, and above-mentioned inner conical surface is combined with male cone (strobilus masculinus) and is closed runner between feeding-passage and the feed back passage; Valve opening on spool (7) hypomere and the lower valve body seals by seal ring, and spool (7) lower end is stretched out lower valve body and is connected with drive unit (10).
2. according to constant voltage needle-valve claimed in claim 1, it is characterized in that: have a needle (9) axially to run through the through hole at spool (7) center, needle (9) lower end is connected with the spool lower end with locking nut (18) by one stage adjust screw rod (17).
3. according to constant voltage needle-valve claimed in claim 1, it is characterized in that: described drive unit (10) is cylinder, and the piston rod of cylinder is connected with spool (7) and is with movable valve plug.
4. according to constant voltage needle-valve claimed in claim 3, it is characterized in that: be provided with spring (15) in the described cylinder, described spring is pressed between cylinder interior the piston bottom surface and cylinder bottom.
5. according to constant voltage needle-valve claimed in claim 3, it is characterized in that: described cylinder bottom is connected with a fastening screw (16), and fastening screw can upwards screw in and withstand the piston bottom surface in the cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220293422 CN202756681U (en) | 2012-06-21 | 2012-06-21 | Constant pressure pin valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220293422 CN202756681U (en) | 2012-06-21 | 2012-06-21 | Constant pressure pin valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202756681U true CN202756681U (en) | 2013-02-27 |
Family
ID=47735865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220293422 Withdrawn - After Issue CN202756681U (en) | 2012-06-21 | 2012-06-21 | Constant pressure pin valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202756681U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705539A (en) * | 2012-06-21 | 2012-10-03 | 镇江市博林光电科技有限公司 | Constant-pressure needle valve |
-
2012
- 2012-06-21 CN CN 201220293422 patent/CN202756681U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705539A (en) * | 2012-06-21 | 2012-10-03 | 镇江市博林光电科技有限公司 | Constant-pressure needle valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130227 Effective date of abandoning: 20130626 |
|
| RGAV | Abandon patent right to avoid regrant |