CN102242821B - High and low pressure switching valve for polyurethane high pressure foaming machine - Google Patents
High and low pressure switching valve for polyurethane high pressure foaming machine Download PDFInfo
- Publication number
- CN102242821B CN102242821B CN 201110093871 CN201110093871A CN102242821B CN 102242821 B CN102242821 B CN 102242821B CN 201110093871 CN201110093871 CN 201110093871 CN 201110093871 A CN201110093871 A CN 201110093871A CN 102242821 B CN102242821 B CN 102242821B
- Authority
- CN
- China
- Prior art keywords
- blocking
- valve body
- low pressure
- valve
- mixing head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention relates to the technical field of high and low pressure switching valves, in particular to a high and low pressure switching valve for a polyurethane high pressure foaming machine. The switching valve comprises a valve body; the valve body is provided with a feeding interface, a return interface, and a first mixing head interface and a second mixing head interface connected with the feeding hole of mixing heads through distribution pipes respectively; a first high pressure loop is formed between the feeding interface and the first mixing head interface; a second high pressure loop is formed between the feeding interface and the second mixing head interface; a low pressure unloading loop is formed between the feeding interface and the return interface; the valve body is provided with a low pressure unloading valve core capable of linearly moving to and fro and controlling opening and closing of the low pressure unloading loop; and the valve body is also provided with a high pressure switching valve core capable of linearly moving to and fro and selectively controlling opening and closing of the first high pressure loop and the second high pressure loop. The switching valve can be used for substituting two sets of independent high and low pressure switching valves and a set of reversing valve, is convenient to control, has compact structure, and can effectively reduce the number of the distribution pipes.
Description
Technical field
The present invention relates to the high/low pressure cut-over valve technical field, relate in particular to a kind of high/low pressure cut-over valve for high-presure polyurethane foaming machine.
Background technique
Along with the forming technique level constantly improves and production technology is gradually improved, polyurethane foam industry has entered new developing stage, and new technology and new product constantly emerge in large numbers.In the process of manufacture of reality, urethane foam product (such as automobile cushion, automobile back etc.) is mainly to be prepared from by the mode that high-presure polyurethane foaming machine combines with shaping die.
Utilizing during high-presure polyurethane foaming machine prepares the process of urethane foam product, the raw material after the batch can heat treated (isocyanates or polyatomic alcohol polybasic alcohol) enters to the feeding-passage of mixing head successively through metering pump and high/low pressure cut-over valve; Wherein, there is two states in mixing head, i.e. working state and holding state.When mixing head was in running order, the high tension loop of high/low pressure cut-over valve was opened, and the low pressure relief circuit is closed, and at this moment, the raw material that enters to high/low pressure cut-over valve from material inlet port all enters to mixing head; When mixing head is in holding state, the low pressure relief circuit of high/low pressure cut-over valve is opened, at this moment, mixing head is not worked, the low pressure relief circuit unloads the pressure of the raw material that enters high/low pressure cut-over valve and reduces the feed pressure that enters mixing head, wherein, a part of raw material directly is back to batch can through the feed back interface of low pressure relief circuit.
Along with manufacturer constantly improves the requirement of the work efficiency of preparation urethane foam product, existing high-presure polyurethane foaming machine tends to connect two (even more than two) mixing heads; During work, satisfy the needs of the shaping die molded polyurethanes foam article of diverse location by switching different mixing heads.For reaching above-mentioned effect, different mixing heads is the separate connection high/low pressure cut-over valve often, each mixing head also must connect the switching that selector valve is realized working state jointly, adopt the high-presure polyurethane foaming machine of above-mentioned form to tend to produce many defectives, for example increased the quantity of pipe arrangement and then increased the burden of installation, debugging work; In addition, due to each high/low pressure cut-over valve and selector valve separate, will cause like this rate of fault of controlling inconvenient problem and increasing system.
Summary of the invention
The object of the invention is to provides a kind of high/low pressure cut-over valve for high-presure polyurethane foaming machine for the deficiencies in the prior art, and this high/low pressure cut-over valve compact structure, pipe arrangement quantity for high-presure polyurethane foaming machine is few and control is convenient.
For achieving the above object, the present invention is achieved through the following technical solutions.
a kind of high/low pressure cut-over valve for high-presure polyurethane foaming machine, include valve body, valve body offers material inlet port, feed back interface and the first mixing head interface and the second mixing head interface that are connected with the material feeding mouth of mixing head by pipe arrangement separately, form the first high tension loop between material inlet port and the first mixing head interface, form the second high tension loop between material inlet port and the second mixing head interface, form the low pressure relief circuit between material inlet port and feed back interface, but valve body is equiped with straight reciprocating motion and controls the low pressure relief circuit and open, the low pressure unloading spool that closes, straight reciprocating motion is also optionally controlled the first high tension loop and the second high tension loop is opened but valve body also is equiped with, the high pressure that closes switches spool.
Wherein, described valve body includes upper strata valve body, center valve body and the lower floor's valve body that is arranged in order, described high pressure switches spool and is installed in the upper strata valve body, described low pressure unloading spool is installed in lower floor's valve body, described the first mixing head interface and described the second mixing head interface are arranged at the upper strata valve body, described material inlet port is arranged at center valve body, and described feed back interface is arranged at lower floor's valve body.
wherein, described upper strata valve body includes the first blocking of arranging and offer respectively in turn the through hole that is communicated with successively, the second blocking, the 3rd blocking, the 4th blocking and the 5th blocking, described the first mixing head interface is positioned at the first blocking, described the second mixing head interface is positioned at the 5th blocking, described high pressure switches spool and includes the first valve rod integrally formed and that be arranged in order vertically, the first valve head and the second valve rod, the first valve rod, the first valve head and the second valve rod are nested in the second blocking successively, in the through hole of the 3rd blocking and the 4th blocking, the second blocking offers left material feeding mouth in the side near described center valve body, the 4th blocking offers right material feeding mouth in the side near center valve body.
Wherein, described the 3rd blocking offers left oil inlet and outlet and the right oil inlet and outlet of the through hole that is communicated with respectively the 3rd blocking, and left oil inlet and outlet and right oil inlet and outlet lay respectively at left side and the right side of described the first valve head.
Wherein, the two end part of the through hole of described the 3rd blocking are nested with respectively the first block, the first block is installed between the 3rd blocking and described the second blocking and the 3rd blocking and described the 4th blocking, the first block and corresponding described the first valve rod and described the second valve rod socket.
Wherein, described center valve body offers the left discharge port that is communicated with described left material feeding mouth and the right discharge port that is communicated with described right material feeding mouth, center valve body offers lower discharge port in the side near described lower floor valve body, and left discharge port, right discharge port and lower discharge port are communicated with described material inlet port respectively.
Wherein, described lower floor valve body includes the 6th blocking, the 7th blocking that offers respectively through hole and the 8th blocking that offers blind hole, described feed back interface is positioned at the 7th blocking, described low pressure unloading spool includes the second integrally formed valve head and the 3rd valve rod, the second valve head is nested in the blind hole of the 8th blocking, the setting of aliging with described lower discharge port of the 3rd valve rod.
Wherein, described the 8th blocking offers upper oil inlet and outlet and the lower oil inlet and outlet that is communicated with the blind hole of inside respectively, and upper oil inlet and outlet and lower oil inlet and outlet lay respectively at upside and the downside of described the second valve head.
Wherein, the opening of the blind hole of described the 8th blocking is nested with the second block, and the second block is installed between the 6th blocking and the 8th blocking, the second block and described the 3rd valve rod socket.
Wherein, described the 7th blocking offers the mixing head feed back interface tube that is communicated with the tapping channel of described mixing head by pipe arrangement, and mixing head feed back interface tube is communicated with the through hole of the 7th blocking.
beneficial effect of the present invention is: a kind of high/low pressure cut-over valve for high-presure polyurethane foaming machine of the present invention, include valve body, valve body offers material inlet port, feed back interface and the first mixing head interface and the second mixing head interface that are connected with the material feeding mouth of mixing head by pipe arrangement separately, form the first high tension loop between material inlet port and the first mixing head interface, form the second high tension loop between material inlet port and the second mixing head interface, form the low pressure relief circuit between material inlet port and feed back interface, but valve body is equiped with straight reciprocating motion and controls the low pressure relief circuit and open, the low pressure unloading spool that closes, straight reciprocating motion is also optionally controlled the first high tension loop and the second high tension loop is opened but valve body also is equiped with, the high pressure that closes switches spool.The present invention connects two different mixing heads by the first mixing head interface and the second mixing head interface, during work, the present invention optionally controls the unlatching of the first high tension loop and the second high tension loop or closes by the position of controlling high pressure switching spool; In addition, the present invention is also switched working state and the holding state of the first high tension loop or the second high tension loop the position by controlling the low pressure unloading spool.The present invention can replace two overlapping independently high/low pressure cut-over valve and a cover selector valve effectively, it is convenient to control, and compact structure also can reduce the quantity of pipe arrangement effectively.
Description of drawings
The below utilizes accompanying drawing, and the present invention is further illustrated, but the embodiment in accompanying drawing does not consist of any limitation of the invention.
Fig. 1 is structural representation of the present invention.
Fig. 2 is the generalized section of the present invention's the second mixing head interface when in running order.
Fig. 3 is the generalized section of the present invention's the second mixing head interface when being in holding state.
Fig. 4 is the generalized section of the present invention's the first mixing head interface when in running order.
Fig. 5 is the generalized section of the present invention's the first mixing head interface when being in holding state.
Include in Fig. 1 to Fig. 5:
1---valve body 101---material inlet port 102---feed back interface
103---first mixing head interface 104---second mixing head interface
11---upper strata valve body 111---first blocking
112---second blocking 112a---left material feeding mouth
113---the right oil inlet and outlets of the 3rd blocking 113a---left oil inlet and outlet 113b---
113c---the right material feeding mouth of the first block 114---the 4th blocking 114a---
115---the left discharge ports of the 5th blocking 12---center valve body 121---
122---right discharge port 123---lower discharge port 13---lower floor's valve bodies
131---the 6th blocking 132---the 7th blocking 133---the 8th blockings
133a---upper oil inlet and outlet 133b---lower oil inlet and outlet 133c---the second block
2---the first high tension loop 3---second high tension loop 4---low pressure relief circuits
5---low pressure unloading spool 51---second valve head 52---the 3rd valve rods
6---high pressure switching spool 61---first valve rod 62---the first valve heads
63---second valve rod 7---mixing head feed back interface tube.
Embodiment
Need to prove, the following describes the word 'fornt', 'back' used, " left side ", " right side ", " on " and D score all refer to direction in accompanying drawing, but above-mentioned word does not limit the present invention concrete assembling situation and use state.
The present invention is further illustrated below in conjunction with embodiment.
embodiment one, as extremely shown in Figure 5 in Fig. 1, a kind of high/low pressure cut-over valve for high-presure polyurethane foaming machine, include valve body 1, valve body 1 offers material inlet port 101, feed back interface 102 and the first mixing head interface 103 and the second mixing head interface 104 that are connected with the material feeding mouth of mixing head by pipe arrangement separately, form the first high tension loop 2 between material inlet port 101 and the first mixing head interface 103, form the second high tension loop 3 between material inlet port 101 and the second mixing head interface 104, form low pressure relief circuit 4 between material inlet port 101 and feed back interface 102, but valve body 1 is equiped with straight reciprocating motion and controls low pressure relief circuit 4 and open, the low pressure unloading spool 5 that closes, straight reciprocating motion is also optionally controlled the first high tension loop 2 and the second high tension loop 3 is opened but valve body 1 also is equiped with, the high pressure that closes switches spool 6.
The present invention is used for connecting two different mixing heads, and wherein, the first mixing head interface 103 and the second mixing head interface 104 connect respectively different mixing heads independently; For above-mentioned two different mixing heads, the present invention offers two high tension loops for the job requirement of satisfying two mixing heads, i.e. the first high tension loop 2 and the second high tension loop 3, wherein, the first high tension loop 2 is communicated with the first mixing head interface 103 and is communicated with the second mixing head interface 104 and material inlet port 101 with material inlet port 101, the second high tension loops 3.during work, the present invention switches by high pressure the open and close that spool 6 is optionally controlled the first high tension loop 2 and the second high tension loop 3, wherein, must further explain, optionally control and can be understood as: add man-hour when high-presure polyurethane foaming machine must carry out filler to shaping die by the mixing head that is connected with the first mixing head interface 103, high pressure switches spool 6 to be shifted to a side of the second mixing head interface 104 and closes the second high tension loop 3, the first high tension loop 2 is opened, at this moment, raw material after the batch can heat treated (isocyanates or polyatomic alcohol polybasic alcohol) enters to mixing head by the first high tension loop 2, same, when must carrying out filler to shaping die by the mixing head that is connected with the second mixing head interface 104, high-presure polyurethane foaming machine adds man-hour, high pressure switches spool 6 to be shifted to a side of the first mixing head interface 103 and closes the first high tension loop 2, the second high tension loop 3 is opened, at this moment, the raw material after the batch can heat treated enters to mixing head by the second high tension loop 3.
Can be to the working state of the first high tension loop 2 or the second high tension loop 3 and the requirement that holding state switches in order to satisfy, the low pressure relief circuit 4 that the present invention is equipped with low pressure unloading spool 5 and is controlled open and close by low pressure unloading spool 5.Now take the mixing head that is connected with the first mixing head interface 103, the working condition of low pressure unloading spool 5 is described as example: the first high tension loop 2 is in opening state, when this mixing head is in running order, low pressure unloading spool 5 is closed low pressure relief circuit 4, and the raw material that enters to valve body 1 from material inlet port 101 all enters to mixing head through the first high tension loop 2; When mixing head must switch to holding state by working state, low pressure unloading spool 5 is recessed low pressure relief circuit 4 and low pressure relief circuit 4 is opened, at this moment, the pressure that 4 pairs of low pressure relief circuits enter the raw material of valve body 1 unloads and reduces the feed pressure that enters mixing head, wherein, a part of raw material directly is back to batch can through the feed back interface 102 of low pressure relief circuit 4.Comprehensive above-mentioned situation as can be known, the present invention controls the working condition of three loops (the first high tension loop 2, the second high tension loop 3 and low pressure relief circuit 4) by two inner spools (low pressure unloading spool 5 and high pressure switch spool 6); So the present invention can replace two to overlap independently high/low pressure cut-over valve and a cover selector valve effectively, control is convenient, compact structure also can reduce the quantity of pipe arrangement effectively.
Further, valve body 1 includes upper strata valve body 11, center valve body 12 and the lower floor's valve body 13 that is arranged in order.wherein, upper strata valve body 11 includes the first blocking 111 of arranging and offer respectively in turn the through hole that is communicated with successively, the second blocking 112, the 3rd blocking 113, the 4th blocking 114 and the 5th blocking 115, the first mixing head interface 103 is positioned at the first blocking 111, the second mixing head interface 104 is positioned at the 5th blocking 115, high pressure switches spool 6 and includes the first valve rod 61 integrally formed and that be arranged in order vertically, the first valve head 62 and the second valve rod 63, the first valve rod 61, the first valve head 62 and the second valve rod 63 are nested in the second blocking 112 successively, in the through hole of the 3rd blocking 113 and the 4th blocking 114, the second blocking 112 offers left material feeding mouth 112a in the side near center valve body 12, the 4th blocking 114 offers right material feeding mouth 114a in the side near center valve body 12, center valve body 12 offers the left discharge port 121 that is communicated with left material feeding mouth 112a and the right discharge port 122 that is communicated with right material feeding mouth 114a, center valve body 12 offers lower discharge port 123 in the side near lower floor's valve body 13, and left discharge port 121, right discharge port 122 and lower discharge port 123 are communicated with material inlet port 101 respectively, lower floor's valve body 13 includes the 6th blocking 131, the 7th blocking 132 that offers respectively through hole and the 8th blocking 133 that offers blind hole, feed back interface 102 is positioned at the 7th blocking 132, low pressure unloading spool 5 includes the second integrally formed valve head 51 and the 3rd valve rod 52, the second valve head 51 is nested in the blind hole of the 8th blocking 133, the setting of aliging with lower discharge port 123 of the 3rd valve rod 52.
concrete structure below in conjunction with above-mentioned valve body 1 is further detailed working procedure of the present invention: the first mixing head interface 103, left material feeding mouth 112a, left discharge port 121 and material inlet port 101 are communicated with and form the first high tension loop 2 successively, the second mixing head interface 104, right material feeding mouth 114a, right discharge port 122 and material inlet port 101 are communicated with and form the second high tension loop 3 successively, and material inlet port 101, lower discharge port 123 and feed back interface 102 are communicated with and form low pressure relief circuit 4 successively, when the first high tension loop 2 when in running order, the first valve rod 61 that high pressure switches spool 6 is recessed the first high tension loop 2 and away from the first blocking 111, the top that high pressure switches the second valve rod 63 of spool 6 compresses the 5th blocking 115 and closes the second high tension loop 3, at this moment, move to limit position on low pressure unloading spool 5 and stop up lower discharge port 123, low pressure relief circuit 4 is closed, and at this moment, the raw material after the batch can heat treated enters to mixing head by the first high tension loop 2, when the first high tension loop 2 is in holding state, upper strata valve body 11 and center valve body 12 keep respectively the position of the first high tension loop 2 when in running order, i.e. the first high tension loop 2 is still opened, the second high tension loop 3 is still closed, low pressure unloading spool 5 is displaced downwardly to limit position, lower discharge port 123 conductings, low pressure relief circuit 4 is opened, at this moment, a raw material part that enters center valve body 12 from material inlet port 101 is back to batch can through the feed back interface 102 of low pressure relief circuit 4, another part still enters to mixing head by the first high tension loop 2, the effect of low pressure relief circuit 4 is: the pressure of the raw material that enters center valve body 12 is unloaded and reduces the pressure that enters mixing head.
When the second high tension loop 3 when in running order, the second valve rod 63 that high pressure switches spool 6 is recessed the second high tension loop 3 and away from the 5th blocking 115, the top that high pressure switches the first valve rod 61 of spool 6 compresses the first blocking 111 and closes the first high tension loop 2, move to limit position on low pressure unloading spool 5 and stop up lower discharge port 123, low pressure relief circuit 4 is closed, and the raw material after the batch can heat treated enters to mixing head by the second high tension loop 3; When the second high tension loop 3 is in holding state, upper strata valve body 11 and center valve body 12 keeps the position of the second high tension loop 3 when in running order, i.e. the second high tension loop 3 is still opened, the first high tension loop 2 is still closed, low pressure unloading spool 5 is displaced downwardly to limit position, lower discharge port 123 conductings, low pressure relief circuit 4 is opened, at this moment, a raw material part that enters to center valve body 12 from material inlet port 101 is back to batch can through the feed back interface 102 of low pressure relief circuit 4, and another part still enters to mixing head by the second high tension loop 3.
As preferred embodiment, the present invention controls by hydraulically powered mode the action that high pressure switches spool 6 and low pressure unloading spool 5, for realizing above-mentioned control mode, the present invention adopts following technical proposals: the 3rd blocking 113 offers left oil inlet and outlet 113a and the right oil inlet and outlet 113b of the through hole that is communicated with respectively the 3rd blocking 113, and left oil inlet and outlet 113a and right oil inlet and outlet 113b lay respectively at left side and the right side of the first valve head 62; The 8th blocking 133 offers upper oil inlet and outlet 133a and the lower oil inlet and outlet 133b that is communicated with the blind hole of inside respectively, and upper oil inlet and outlet 133a and lower oil inlet and outlet 133b lay respectively at upside and the downside of the second valve head 51.in the present invention is assemblied in the process of high-presure polyurethane foaming machine, left oil inlet and outlet 113a, right oil inlet and outlet 113b, upper oil inlet and outlet 133a and lower oil inlet and outlet 133b are connected with the oil hydraulic pump of hydraulic station by oil transport pipeline respectively, the first valve head 62 is separated into the through hole of the 3rd blocking 113 be used to the chamber, left side and the right-side cavity that pass into hydraulic oil, the second valve head 51 is separated into upside chamber and downside chamber with the blind hole of the 8th blocking 133, now the course of action of high pressure switching spool 6 and low pressure unloading spool 5 is further detailed: when hydraulic pump drive hydraulic oil enters the chamber, left side of the 3rd blocking 113 from left oil inlet and outlet 113a, high pressure switches spool 6 and moves and the second high tension loop 3 is closed towards the 5th blocking 115 under the impetus of hydraulic oil, at this moment, the hydraulic oil that before had been stranded in the right-side cavity of the 3rd blocking 113 is back to hydraulic station through right oil inlet and outlet 113b, when hydraulic pump drive hydraulic oil enters the right-side cavity of the 3rd blocking 113 from right oil inlet and outlet 113b, high pressure switches spool 6 and moves and the first high tension loop 2 is closed towards the first blocking 111 under the impetus of hydraulic oil, at this moment, the hydraulic oil that before had been stranded in the chamber, left side of the 3rd blocking 113 is back to hydraulic station through left oil inlet and outlet 113a, when hydraulic pump drive hydraulic oil enters the upside chamber of the 8th blocking 133 from upper oil inlet and outlet 133a, move low pressure unloading spool 5 bottom towards the blind hole of the 8th blocking 133 under the impetus of hydraulic oil, low pressure relief circuit 4 is opened, at this moment, the hydraulic oil that before had been stranded in the downside chamber of the 8th blocking 133 is back to hydraulic station through lower oil inlet and outlet 133b, when hydraulic pump drive hydraulic oil enters the downside chamber of the 8th blocking 133 from lower oil inlet and outlet 133b, low pressure unloading spool 5 opening side towards blind hole under the impetus of hydraulic oil moves and low pressure relief circuit 4 is closed, at this moment, the hydraulic oil that before had been stranded in the upside chamber of the 8th blocking 133 is back to hydraulic station through upper oil inlet and outlet 133a.
Further, the two end part of the through hole of the 3rd blocking 113 are nested with respectively the first block 113c, the first block 113c is installed between the 3rd blocking 113 and described the second blocking 112 and the 3rd blocking 113 and described the 4th blocking 114, the first block 113c and corresponding the first valve rod 61 and the second valve rod 63 sockets; Same, the opening of the blind hole of the 8th blocking 133 is nested with the second block 133c, and the second block 133c is installed between the 6th blocking 131 and the 8th blocking 133, the second block 133c and the 3rd valve rod 52 sockets.The present invention seals the through hole of the 3rd blocking 113 by the first block 113c, wherein, the first block 113c respectively with the first valve rod 61 of respective side and the second valve rod 63 sockets, for further guaranteeing the sealing effect of chamber, above-mentioned left side and right-side cavity, the present invention can also set up O-ring seal between the first block 113c and the 3rd blocking 113.Same, the present invention seals the blind hole of the 8th blocking 133 by the second block 133c, wherein, the second block 133c and the 3rd valve rod 52 sockets, for further guaranteeing the sealing effect in above-mentioned upside chamber, the present invention can also set up O-ring seal between the second block 133c and the 8th blocking 133.
Embodiment two, and the present embodiment is with embodiment one difference: the 7th blocking 132 offers the mixing head feed back interface tube 7 that is communicated with the tapping channel of mixing head by pipe arrangement, and mixing head feed back interface tube 7 is communicated with the through hole of the 7th blocking 132.Mixing head feed back interface tube 7 of the present invention is connected with the tapping channel of mixing head by pipe arrangement, in working procedure of the present invention, when the mixing chamber of mixing head was closed, the raw material that is entered to corresponding mixing head by the first high tension loop 2 or the second high tension loop 3 directly flowed into mixing head feed back interface tube 7 and is back to batch can by feed back interface 102 through the tapping channel of mixing head; So by offering mixing head feed back interface tube 7 at the 7th blocking 132, the present invention can reduce the length of pipe arrangement and the quantity of pipe arrangement.
Above content is only preferred embodiment of the present invention, for those of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, and this description should not be construed as limitation of the present invention.
Claims (6)
1. high/low pressure cut-over valve that is used for high-presure polyurethane foaming machine, include valve body (1), it is characterized in that: valve body (1) offers material inlet port (101), feed back interface (102) and the first mixing head interface (103) and the second mixing head interface (104) that are connected with the material feeding mouth of mixing head by pipe arrangement separately, form the first high tension loop (2) between material inlet port (101) and the first mixing head interface (103), form the second high tension loop (3) between material inlet port (101) and the second mixing head interface (104), form low pressure relief circuit (4) between material inlet port (101) and feed back interface (102), valve body (1) but be equiped with straight reciprocating motion and control low pressure relief circuit (4) and open, the low pressure unloading spool (5) that closes, valve body (1) but also be equiped with straight reciprocating motion and optionally control the first high tension loop (2) and the second high tension loop (3) is opened, the high pressure that closes switches spool (6),
Described valve body (1) includes upper strata valve body (11), center valve body (12) and the lower floor's valve body (13) that is arranged in order, described high pressure switches spool (6) and is installed in upper strata valve body (11), described low pressure unloading spool (5) is installed in lower floor's valve body (13), described the first mixing head interface (103) and described the second mixing head interface (104) are arranged at upper strata valve body (11), described material inlet port (101) is arranged at center valve body (12), and described feed back interface (102) is arranged at lower floor's valve body (13);
described upper strata valve body (11) includes the first blocking (111) of arranging and offer respectively in turn the through hole that is communicated with successively, the second blocking (112), the 3rd blocking (113), the 4th blocking (114) and the 5th blocking (115), described the first mixing head interface (103) is positioned at the first blocking (111), described the second mixing head interface (104) is positioned at the 5th blocking (115), described high pressure switches spool (6) and includes the first valve rod (61) integrally formed and that be arranged in order vertically, the first valve head (62) and the second valve rod (63), the first valve rod (61), the first valve head (62) and the second valve rod (63) are nested in the second blocking (112) successively, in the through hole of the 3rd blocking (113) and the 4th blocking (114), the second blocking (112) offers left material feeding mouth (112a) in the side near described center valve body (12), the 4th blocking (114) offers right material feeding mouth (114a) in the side near center valve body (12),
Described the 3rd blocking (113) offers left oil inlet and outlet (113a) and the right oil inlet and outlet (113b) of the through hole that is communicated with respectively the 3rd blocking (113), and left oil inlet and outlet (113a) and right oil inlet and outlet (113b) lay respectively at left side and the right side of described the first valve head (62);
Described center valve body (12) offers the left discharge port (121) that is communicated with described left material feeding mouth (112a) and the right discharge port (122) that is communicated with described right material feeding mouth (114a), center valve body (12) offers lower discharge port (123) in the side near described lower floor valve body (13), and left discharge port (121), right discharge port (122) and lower discharge port (123) are communicated with described material inlet port (101) respectively.
2. a kind of high/low pressure cut-over valve for high-presure polyurethane foaming machine according to claim 1, it is characterized in that: the two end part of the through hole of described the 3rd blocking (113) are nested with respectively the first block (113c), two described the first blocks (113c) are installed in respectively between the 3rd blocking (113) and described the second blocking (112) and the 3rd blocking (113) and described the 4th blocking (114), two described the first blocks (113c) respectively with corresponding described the first valve rod (61) and described the second valve rod (63) socket.
3. a kind of high/low pressure cut-over valve for high-presure polyurethane foaming machine according to claim 1, it is characterized in that: described lower floor valve body (13) includes the 6th blocking (131) that offers respectively through hole, the 7th blocking (132) and the 8th blocking (133) that offers blind hole, described feed back interface (102) is positioned at the 7th blocking (132), described low pressure unloading spool (5) includes integrally formed the second valve head (51) and the 3rd valve rod (52), the second valve head (51) is nested in the blind hole of the 8th blocking (133), the 3rd valve rod (52) setting of aliging with described lower discharge port (123).
4. a kind of high/low pressure cut-over valve for high-presure polyurethane foaming machine according to claim 3, it is characterized in that: described the 8th blocking (133) offers upper oil inlet and outlet (133a) and the lower oil inlet and outlet (133b) that is communicated with the blind hole of inside respectively, and upper oil inlet and outlet (133a) and lower oil inlet and outlet (133b) lay respectively at upside and the downside of described the second valve head (51).
5. a kind of high/low pressure cut-over valve for high-presure polyurethane foaming machine according to claim 4, it is characterized in that: the opening of the blind hole of described the 8th blocking (133) is nested with the second block (133c), the second block (133c) is installed between the 6th blocking (131) and the 8th blocking (133), the second block (133c) and described the 3rd valve rod (52) socket.
6. a kind of high/low pressure cut-over valve for high-presure polyurethane foaming machine according to claim 3, it is characterized in that: described the 7th blocking (132) offers the mixing head feed back interface tube (7) that is communicated with the tapping channel of described mixing head by pipe arrangement, and mixing head feed back interface tube (7) is communicated with the through hole of the 7th blocking (132).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110093871 CN102242821B (en) | 2011-04-14 | 2011-04-14 | High and low pressure switching valve for polyurethane high pressure foaming machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110093871 CN102242821B (en) | 2011-04-14 | 2011-04-14 | High and low pressure switching valve for polyurethane high pressure foaming machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102242821A CN102242821A (en) | 2011-11-16 |
| CN102242821B true CN102242821B (en) | 2013-06-12 |
Family
ID=44961007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110093871 Expired - Fee Related CN102242821B (en) | 2011-04-14 | 2011-04-14 | High and low pressure switching valve for polyurethane high pressure foaming machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102242821B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151638B (en) * | 2015-03-23 | 2018-07-10 | 氟络塞尔特种阀门(苏州)有限公司 | A kind of electrically-controlled valve |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3747623A (en) * | 1972-03-01 | 1973-07-24 | Itt | Fluid flow control manifolds and devices |
| US5441079A (en) * | 1994-04-22 | 1995-08-15 | Tri-Clover, Inc. | Manifold valve assemblies |
| US5469880A (en) * | 1994-12-16 | 1995-11-28 | Tetra Laval Holdings & Finance, S.C. | Manifold valve assemblies with cleaning solution supply |
| CN2345799Y (en) * | 1998-07-23 | 1999-10-27 | 王贵仁 | Liquid material high-low-pressure cross valve of polyurethane high-pressure foaming machine |
| CN2429317Y (en) * | 2000-07-03 | 2001-05-09 | 王贵仁 | Mixing device of high pressure foaming apparatus for polyurethanes with two densities |
| CN202023953U (en) * | 2011-04-14 | 2011-11-02 | 东莞市骏颖机械制造有限公司 | High and low pressure switching valve for polyurethane high pressure foaming machine |
-
2011
- 2011-04-14 CN CN 201110093871 patent/CN102242821B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN102242821A (en) | 2011-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103410803B (en) | The hydraulic control system of pilot operated directional control valve, coordinated signals hydraulic system and excavator | |
| CN102230484A (en) | Integrated continuous gas-driving hydraulic force booster | |
| CN202023953U (en) | High and low pressure switching valve for polyurethane high pressure foaming machine | |
| CN102644632A (en) | Electro-hydraulic multiple-way directional valve | |
| CN102242821B (en) | High and low pressure switching valve for polyurethane high pressure foaming machine | |
| CN107339278A (en) | A kind of automatic reciprocating hydraulic cylinder of stroke controllable type | |
| CN201096115Y (en) | Hydraulic combined valve | |
| CN103452937A (en) | Multi-channel hydraulic control valve | |
| CN201645235U (en) | Machine power slide double pumps circuit | |
| CN208232272U (en) | A kind of hydraulic control device that novel injection moulding machine unlocking mold is synchronous with melten gel | |
| CN209654331U (en) | Hydraulic system and engineering truck | |
| CN202228480U (en) | Concrete pumping device and pumping control system thereof | |
| CN109129199B (en) | Mixed abrasive material fluidic equipment before ultra-high pressure of series-parallel integrated form | |
| CN102574144B (en) | Apparatus for filling paint cartridges | |
| CN107420366B (en) | Automatic switching sharing valve block for cooling pneumatic function in machine tool equipment control system | |
| CN104929930A (en) | Gear pump capable of achieving high-pressure flow and low-pressure flow convergence and distribution | |
| CN109469656A (en) | Hydraulic system and engineering truck | |
| CN102937074B (en) | Continuous material feeding system and control method and elevating platform fire truck thereof | |
| CN107387473A (en) | Tandem piggybacking formula multipath hydraulic control device | |
| CN101334126B (en) | Displacement type double valves lubrication apparatus | |
| CN102990885A (en) | Hydraulic control system | |
| CN202867371U (en) | Cushion valve | |
| CN202228326U (en) | Flashboard type concrete pump and pumping control system thereof | |
| CN210882834U (en) | High-low standard cement switching and packaging system | |
| CN202531520U (en) | Filling valve block provided with pilot oil line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130612 Termination date: 20140414 |