CN202628650U - Series connection and parallel connection changeover valve for power tongs - Google Patents
Series connection and parallel connection changeover valve for power tongs Download PDFInfo
- Publication number
- CN202628650U CN202628650U CN 201220307091 CN201220307091U CN202628650U CN 202628650 U CN202628650 U CN 202628650U CN 201220307091 CN201220307091 CN 201220307091 CN 201220307091 U CN201220307091 U CN 201220307091U CN 202628650 U CN202628650 U CN 202628650U
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- oil
- oil pocket
- fluid port
- hydraulic fluid
- valve
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Abstract
The utility model relates to a series connection and parallel connection changeover valve for power tongs. The series connection and parallel connection changeover valve comprises a valve body, a valve spool and other relevant parts. A selector valve is connected to the front of the changeover valve, and two hydraulic motors are connected to the rear of the changeover valve. High-speed low-torque or low-speed high-torque gear shifting can be realized by the changeover valve, namely, changeover between series connection and parallel connection can be realized by the two hydraulic motors. Two one-way throttling valves are further disposed in the valve body, so that intermediate pressure of the two hydraulic motors can be adjusted when the changeover valve is used in a series connection changeover process, and rotational speeds of the two hydraulic motors keep identical.
Description
Technical field
The utility model relates to the control valve in the hydraulic transmission, and particularly a kind of power tong is used the series parallel connection switching valve.
Background technique
In the power tong research and development; Relevant new product need be equipped with two oil hydraulic motors and drive binding clips and implement to require two oil hydraulic motor rotating speeds identical to shackle on the tubing string, and reaches the little moment of torsion of high speed and do not shut down the flexible effect of shifting gears with low-speed big; And power tong belongs to field work equipment; Frequent resettlement to the condition of the installing and using harshness of control valve, does not have to realize the control valve of this function in the prior art.The purpose of the utility model will be released a kind of power tong exactly and use the series parallel connection switching valve, makes power tong in hydraulic control, can carry out series parallel connection and frequently switches, and two oil hydraulic motor rotating speeds are identical, and realization little moment of torsion of high speed or low-speed big are not shut down flexible gear shift.
Summary of the invention
The technological scheme of the utility model is: a kind of power tong is with series parallel connection switching valve (hereinafter to be referred as switching valve); Contain valve body, spool and other correlated parts; Oil pocket Q1, oil pocket Q2, oil pocket Q3, oil pocket Q4, oil pocket Q5 are arranged in the valve body; Wherein oil pocket Q4, oil pocket Q5 are linked up by the valve body internal channel, and hydraulic fluid port A, hydraulic fluid port B, hydraulic fluid port C, hydraulic fluid port D, hydraulic fluid port E, hydraulic fluid port F are arranged, and wherein hydraulic fluid port A, the corresponding hydraulic fluid port with selector valve of hydraulic fluid port B link to each other; Hydraulic fluid port C, hydraulic fluid port F link to each other with oil hydraulic motor M1 oil inlet and outlet, and hydraulic fluid port D, hydraulic fluid port E link to each other with oil hydraulic motor M2 oil inlet and outlet.Spool has annular groove H1, annular groove H2, annular groove H3 and inner oil duct, on the annular groove H1 oilhole is arranged, and on the annular groove H3 oilhole is arranged, and communicates through inner oil duct.When spool moved to left the location, annular groove H1 linked up oil pocket Q1, oil pocket Q2, and annular groove H2 links up oil pocket Q3, oil pocket Q4, and annular groove H3 is by the valve body inner bore shutoff, and formation oil hydraulic motor M1, oil hydraulic motor M2 are connected in parallel.Also be provided with one-way throttle valve C, one-way throttle valve D in the valve body, one-way throttle valve C wherein, the throttling direction flows to the Q2 oil pocket for the Q1 oil pocket; One-way throttle valve D, the throttling direction flows to the Q4 oil pocket for the Q3 oil pocket.When being connected in parallel, one-way throttle valve C, one-way throttle valve D pressure at two ends balance do not have oil stream and pass through, and do not influence proper functioning.When spool moved to right the location, oil pocket Q1, oil pocket Q3 were by the spool shutoff, and oil pocket Q2, oil pocket Q4, oil pocket Q5 link up with annular groove H1, annular groove H2, annular groove H3 respectively, and promptly oil pocket Q2, oil pocket Q5 link up, and formation oil hydraulic motor M1, oil hydraulic motor M2 are connected in series.
Description of drawings
Fig. 1 is the utility model parallel connection schematic representation;
Fig. 2 is the A-A generalized section of Fig. 1;
Fig. 3 is the utility model series connection schematic representation;
Fig. 4 is the B-B generalized section of Fig. 3;
Fig. 5 is parallelly connected hydraulic flow figure;
Fig. 6 is series connection hydraulic flow figure.
Embodiment
As shown in Figure 1; A kind of power tong is used the series parallel connection switching valve; Contain valve body 1, spool 2 and other correlated parts, oil pocket Q1, oil pocket Q2, oil pocket Q3, oil pocket Q4, oil pocket Q5 are arranged in the valve body 1, wherein oil pocket Q4, oil pocket Q5 are linked up by valve body internal channel 4; Hydraulic fluid port A, hydraulic fluid port B, hydraulic fluid port C, hydraulic fluid port D, hydraulic fluid port E, hydraulic fluid port F are arranged; Wherein hydraulic fluid port A, the corresponding hydraulic fluid port with selector valve of hydraulic fluid port B link to each other, and hydraulic fluid port C, hydraulic fluid port F link to each other with oil hydraulic motor M1 oil inlet and outlet, and hydraulic fluid port D, hydraulic fluid port E link to each other with oil hydraulic motor M2 oil inlet and outlet.Spool 2 has annular groove H1, annular groove H2, annular groove H3 and inner oil duct 6, and oilhole 3 is arranged on the annular groove H1, and oilhole 5 is arranged on the annular groove H3, communicates through inner oil duct 6.When spool 2 moved to left the location, annular groove H1 linked up oil pocket Q1, oil pocket Q2, and annular groove H2 links up oil pocket Q3, oil pocket Q4, and annular groove H3 is by the valve body inner bore shutoff, and formation oil hydraulic motor M1, oil hydraulic motor M2 are connected in parallel.
As shown in Figure 2; Also be provided with one-way throttle valve C, one-way throttle valve D in the valve body 1; Wherein one-way throttle valve C is made up of throttling passage 7, throttling passage 11, runner 8, steel ball 9, pressure adjusting spring 10 and push rod 12, and the throttling direction flows to the Q2 oil pocket for the Q1 oil pocket, oppositely then by shutoff; One-way throttle valve D is made up of throttling passage 18, throttling passage 15, runner 17, steel ball 16, pressure adjusting spring 14 and push rod 13, and the throttling direction flows to the Q4 oil pocket for the Q3 oil pocket, oppositely then by shutoff.When being connected in parallel, one-way throttle valve C, one-way throttle valve D pressure at two ends balance do not have oil stream and pass through, and do not influence proper functioning.Adjustment pressure adjusting spring 10 and pressure adjusting spring 14 make the throttling pressure at two ends adjustable.
As shown in Figure 3; When spool 2 moved to right the location, oil pocket Q1, oil pocket Q3 were by spool 2 shutoff, and oil pocket Q2, oil pocket Q4, oil pocket Q5 link up with annular groove H1, annular groove H2, annular groove H3 respectively; Be that oil pocket Q2, oil pocket Q5 link up, formation oil hydraulic motor M1, oil hydraulic motor M2 are connected in series.
As shown in Figure 4; When hydraulic fluid port A was being connected in series of filler opening, oil was flowed through and is got into oil hydraulic motor M2 behind the oil hydraulic motor M1, because oil hydraulic motor and switching valve are let out in existing; The oil pressure that gets into oil hydraulic motor M2 is by one-way throttle valve C control, and this moment, one-way throttle valve D was inoperative; When hydraulic fluid port B was being connected in series of filler opening, oil was flowed through and is got into oil hydraulic motor M1 behind the oil hydraulic motor M2, because oil hydraulic motor and switching valve are let out in existing, the oil pressure that gets into oil hydraulic motor M1 is by one-way throttle valve D control, and this moment, one-way throttle valve C was inoperative.
As shown in Figure 5, F is the utility model switching valve, and M1, M2 are oil hydraulic motor, and C, D are one-way throttle valve.Can know that by figure the filler opening of two oil hydraulic motors and oil outlet are connected in respectively on the same pipeline, two one-way throttle valve pressure at two ends balances, throttling passage does not have oil stream to be passed through.
As shown in Figure 6, when hydraulic fluid port A is being connected in series of filler opening, get into oil hydraulic motor M2 behind the oil stream process oil hydraulic motor M1; This moment, one-way throttle valve C went up end pressure greater than following end pressure, had controlled micro oil stream to pass through, and added to oil hydraulic motor M2 filler opening; And one-way throttle valve D upper end links to each other with the oil outlet of oil hydraulic motor M1; The lower end links to each other with the return opening of oil hydraulic motor M2, and last end pressure does not have oil stream and passes through greater than following end pressure.
When the next oil of switching valve, when oil return commutates (being that hydraulic fluid port B is being connected in series of filler opening) through selector valve, get into oil hydraulic motor M1 behind the oily stream process oil hydraulic motor M2, flow oppositely to oil, effect is identical.
Claims (2)
1. a power tong is used the series parallel connection switching valve, contains valve body (1), spool (2) and other correlated parts, links to each other with selector valve and oil hydraulic motor M1, oil hydraulic motor M2 respectively; It is characterized in that: oil pocket Q1, oil pocket Q2, oil pocket Q3, oil pocket Q4, oil pocket Q5 are arranged in the valve body (1), and wherein oil pocket Q4, oil pocket Q5 are linked up by valve body internal channel (4), and hydraulic fluid port A, hydraulic fluid port B, hydraulic fluid port C, hydraulic fluid port D, hydraulic fluid port E, hydraulic fluid port F are arranged; Wherein hydraulic fluid port A, the corresponding hydraulic fluid port with selector valve of hydraulic fluid port B link to each other, and hydraulic fluid port C, hydraulic fluid port F link to each other with oil hydraulic motor M1 oil inlet and outlet, and hydraulic fluid port D, hydraulic fluid port E link to each other with oil hydraulic motor M2 oil inlet and outlet; Spool (2) has annular groove H1, annular groove H2, annular groove H3 and inner oil duct (6), and oilhole (3) is arranged on the annular groove H1, and oilhole (5) is arranged on the annular groove H3; Communicate through inner oil duct (6), when spool (2) moved to left the location, annular groove H1 linked up oil pocket Q1, oil pocket Q2; Annular groove H2 links up oil pocket Q3, oil pocket Q4, and annular groove H3 is by the valve body inner bore shutoff, and formation oil hydraulic motor M1, oil hydraulic motor M2 are connected in parallel; When spool (2) moves to right the location; Oil pocket Q1, oil pocket Q3 are by spool (2) shutoff, and oil pocket Q2, oil pocket Q5 link up, and formation oil hydraulic motor M1, oil hydraulic motor M2 are connected in series.
2. a kind of power tong as claimed in claim 1 is used the series parallel connection switching valve; It is characterized in that: also be provided with one-way throttle valve C, one-way throttle valve D in the valve body (1); The throttling direction of one-way throttle valve C flows to the Q2 oil pocket for the Q1 oil pocket; The throttling direction of one-way throttle valve D flows to the Q4 oil pocket for the Q3 oil pocket, and one-way throttle valve C and one-way throttle valve D adjustment pressure adjusting spring (10) and pressure adjusting spring (14) make the throttling pressure at two ends adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220307091 CN202628650U (en) | 2012-06-18 | 2012-06-18 | Series connection and parallel connection changeover valve for power tongs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220307091 CN202628650U (en) | 2012-06-18 | 2012-06-18 | Series connection and parallel connection changeover valve for power tongs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202628650U true CN202628650U (en) | 2012-12-26 |
Family
ID=47381855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220307091 Expired - Lifetime CN202628650U (en) | 2012-06-18 | 2012-06-18 | Series connection and parallel connection changeover valve for power tongs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202628650U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591282A (en) * | 2013-11-27 | 2014-02-19 | 贵州大学 | Engineering machinery walking speed controlling and switching valve |
| CN104343757A (en) * | 2014-10-13 | 2015-02-11 | 浙江三一装备有限公司 | Running gear speed switching control system and engineering machine |
-
2012
- 2012-06-18 CN CN 201220307091 patent/CN202628650U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591282A (en) * | 2013-11-27 | 2014-02-19 | 贵州大学 | Engineering machinery walking speed controlling and switching valve |
| CN103591282B (en) * | 2013-11-27 | 2016-02-10 | 贵州大学 | Moving speed of engineering machine controls switching valve |
| CN104343757A (en) * | 2014-10-13 | 2015-02-11 | 浙江三一装备有限公司 | Running gear speed switching control system and engineering machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121226 |