CN108821168A - A kind of welded type hydraulic jack with safety valve - Google Patents
A kind of welded type hydraulic jack with safety valve Download PDFInfo
- Publication number
- CN108821168A CN108821168A CN201711262087.XA CN201711262087A CN108821168A CN 108821168 A CN108821168 A CN 108821168A CN 201711262087 A CN201711262087 A CN 201711262087A CN 108821168 A CN108821168 A CN 108821168A
- Authority
- CN
- China
- Prior art keywords
- asphalt channel
- safety valve
- oil
- oil pocket
- valve
- 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.)
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- 239000003921 oil Substances 0.000 claims abstract description 247
- 239000010426 asphalt Substances 0.000 claims abstract description 226
- 230000003139 buffering effect Effects 0.000 claims abstract description 92
- 239000006071 cream Substances 0.000 claims abstract description 61
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 53
- 238000010992 reflux Methods 0.000 claims abstract description 46
- 229910000831 Steel Inorganic materials 0.000 claims description 48
- 239000010959 steel Substances 0.000 claims description 48
- 239000007788 liquid Substances 0.000 claims description 29
- 238000003825 pressing Methods 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 19
- 239000011324 bead Substances 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 16
- 239000000872 buffer Substances 0.000 claims description 15
- 239000002199 base oil Substances 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 239000010720 hydraulic oil Substances 0.000 abstract description 12
- 230000035484 reaction time Effects 0.000 abstract description 2
- 238000004904 shortening Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 210000003739 neck Anatomy 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005493 welding type Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
Abstract
A kind of welded type hydraulic jack with safety valve including pedestal, the shell being mounted on the base, the oil cylinder in shell, is located at in-oil cylinder piston component, check valve A, check valve B and gate gurgle valve；It further include reflux asphalt channel and safety valve, one end of the reflux asphalt channel is connected to asphalt channel A, and tie point, between shoe cream room and check valve A, the other end is connected to asphalt channel B, and tie point, between buffering oil pocket and check valve B, safety valve setting is on reflux asphalt channel.The present invention is with the above mentioned technical proposal, compared with prior art, the present invention realizes reflux of the hydraulic oil from cushion chamber to shoe cream room using existing asphalt channel A, guaranteeing that hydraulic jack do not exceed maximum load simultaneously, also achieve the most short, most simplified of oil circuit, processing cost is not only saved, when also shortening hydraulic jack and withstanding on safety valve and open, the reaction time of hydraulic oil in hydraulic jack.
Description
Technical field
The invention belongs to machinery equipment field, it particularly relates to a kind of welded type hydraulic jack with safety valve.
Background technique
Hydraulic drive be using liquid as working media, using the pressure of liquid can be carried out energy transmitting and control one
Gate technique.Hydraulic drive has many advantages, is widely used in the necks such as mechanical, building, metallurgy, chemical industry and aerospace
Domain.
Hydraulic jack is a kind of small simple lifting equipment of lifting height, it be mainly used for vehicle maintenance lifting,
The work such as support.Its light structure is firm, and flexibly convenient, operation can be completed in one.Jack be use rigid top lift part as
Equipment jacks the light and small lifting equipment of weight by top bracket or bottom claw in small stroke, be divided into it is mechanical and
Two kinds of fluid pressure type.Mechanical jack is because its lifting weight is small, and operation is laborious, therefore is not suitable for vehicle maintenance, and fluid pressure type
Jack structure is compact, stable working, and lifting weight is big, and has self-locking function, therefore is widely used in vehicle maintenance field.
Hydraulic jack is generally mainly made of following component：Shoe cream room, buffering oil pocket, working oil chamber, asphalt channel, check valve
And piston；Shoe cream room is connect by asphalt channel with buffering oil pocket, and buffering oil pocket is connect by asphalt channel with working oil chamber, is stored up
There is a check valve A on asphalt channel between oil pocket and buffering oil pocket, so that liquid can only flow to buffering oil pocket from shoe cream room,
There is a check valve B on asphalt channel between buffering oil pocket and working oil chamber, so that liquid can only flow to work from buffering oil pocket
Make oil pocket, for piston in working oil chamber, liquid is lifted piston to jack weight.Its working principle is that：Make oil storage with oil pump component
Box-shaped is at negative pressure, and check valve A is opened at this time, and check valve B is closed, and liquid flows into buffering oil pocket from shoe cream room；Make in baffle-box again
Portion forms positive pressure, and check valve B is opened at this time, and check valve A is closed, and liquid flows into working oil chamber from buffering oil pocket, and liquid is working
It is lifted piston in oil pocket, weight can be jacked.When hydraulic jack withstands on design, can all there be a rated load weight, that is, exist
Under normal running conditions, hydraulic jack designs the maximum load that can jack total travel, if being more than maximum load, will lead to cylinder
Body distorts, so that hydraulic jack is scrapped, however there is no corresponding protective devices for existing hydraulic jack, therefore suddenly
A kind of safety valve that can prevent it from overloading need to be set on liquid jack, to guarantee that hydraulic jack being capable of trouble free service.
Summary of the invention
To solve the problems in background technique, the welded type hydraulic jack with safety valve that the present invention provides a kind of.
The technical scheme is that：A kind of welded type hydraulic jack with safety valve, including pedestal, it is mounted on bottom
Shell on seat, the oil cylinder in shell positioned at in-oil cylinder piston component and are mounted on the base oil pump component.Pedestal,
It is equipped with shoe cream room between shell and oil cylinder, working oil chamber is equipped between pedestal, oil cylinder and piston component, is additionally provided with buffering on pedestal
Oil pocket；It is connected between working oil chamber, buffering oil pocket and shoe cream room by the asphalt channel being located on pedestal, the asphalt channel packet
It includes connection shoe cream room and buffers the asphalt channel A of oil pocket, the asphalt channel B of connection buffering oil pocket and working oil chamber and connection work
The asphalt channel C of oil pocket and shoe cream room；Check valve A, check valve B and gate gurgle valve are additionally provided on pedestal；It is logical that check valve A is located at oil circuit
On road A, so that oil liquid is only capable of one-way flow in asphalt channel A, circulating direction is the direction that shoe cream room extremely buffers oil pocket；Unidirectionally
Valve B is located on asphalt channel B, so that oil liquid is only capable of one-way flow in asphalt channel B, circulating direction is that buffering oil pocket extremely works
The direction of oil pocket；Gate gurgle valve is arranged on asphalt channel C, controls the opening and closing of asphalt channel C；Reflux is additionally provided on pedestal
One end of asphalt channel, the reflux asphalt channel is connected to asphalt channel A, and tie point is between shoe cream room and check valve A,
The other end is connected to asphalt channel B, and tie point is between buffering oil pocket and check valve B；Or one end directly connects with shoe cream room
It connects, the other end is connect with buffering oil pocket or asphalt channel B, and tie point is located between check valve B and buffering oil pocket；Safety valve is set
It sets on reflux asphalt channel, safety valve is closed when normal work, and when being more than maximum load, safety valve is opened, so that buffering
Oil pocket is connected to shoe cream room.
Preferably, the asphalt channel A is upwardly formed asphalt channel AA after extending to below buffering oil pocket from shoe cream room, oil
Paths AA is connected to the bottom of buffering oil pocket；Asphalt channel B from working oil chamber extend to buffering oil pocket side-lower after, level side
Asphalt channel BA is formed to extending to below buffering oil pocket, forms asphalt channel BB then up, asphalt channel BB is connected to slow
Rush the bottom of oil pocket；One end of reflux asphalt channel is connect with asphalt channel AA, and the other end is connect with asphalt channel BB；Check valve
A is located at asphalt channel AA and buffers the intersection of oil pocket, and check valve B is located at the intersection of asphalt channel B and asphalt channel BA, pacifies
Full valve setting is on reflux asphalt channel；When normal work, safety valve is closed；When being more than maximum load, safety valve is opened, i.e.,
The asphalt channel that flows back is opened, so that asphalt channel AA is connected to asphalt channel BB, i.e. buffering oil pocket is connected to shoe cream room.
Preferably, the asphalt channel A is upwardly formed asphalt channel AB after extending to below buffering oil pocket from shoe cream room, oil
Paths AB is connected to the bottom of buffering oil pocket；Asphalt channel B is upwardly formed after extending to below buffering oil pocket from working oil chamber
Asphalt channel BC, asphalt channel BC are connected to the bottom of buffering oil pocket；One end of reflux asphalt channel is connect with shoe cream room, another
End is connect with asphalt channel BA；Check valve A is located at asphalt channel AB and buffers the intersection of oil pocket, and check valve B is logical positioned at oil circuit
The intersection of road B and working oil chamber, safety valve setting is on reflux asphalt channel；Safety valve is closed when normal work；When being more than
When maximum load, safety valve is opened, i.e. reflux asphalt channel is opened, so that shoe cream room is connected to asphalt channel BA, i.e. shoe cream room
It is connected to buffering oil pocket.
Preferably, the safety valve includes pressure regulating screw, safety valve spring, safety valve steel ball, valve pearl seat, safety valve sealing
Circle and safety valve capping, pressure regulating screw is sealingly mounted at the bottom sides of pedestal, and is sealed by safe valve seals, and then will
Including safety valve spring and safety valve steel ball block, one end of safety valve spring is contacted with pressure regulating screw, the other end and valve pearl seat
Contact, safety valve steel ball and valve pearl seated connection touch, and safety valve capping is mounted on the outside of pressure regulating screw；Safety valve spring will by elastic force
Safety valve steel ball is pressed on the wall surface of reflux asphalt channel, so that reflux asphalt channel is blocked, when oil liquid overcomes elastic force to open
When safety valve steel ball, gap is formed between safety valve steel ball and the wall surface for the asphalt channel that flows back, reflux asphalt channel is opened, will be buffered
Oil pocket is connected to shoe cream room.
Preferably, the check valve B includes plug, spring and steel ball, and plug is sealingly mounted at the bottom sides of pedestal, into
And including blocking spring and steel ball, spring one end is contacted with plug, and the other end is contacted with steel ball, is compressed steel ball by elastic force
On the wall surface of asphalt channel B, so that asphalt channel B is blocked, when oil liquid overcomes elastic force to open steel ball, steel ball and asphalt channel
Gap is formed between the wall surface of B, asphalt channel B is opened, and oil liquid flows to working oil chamber from buffering oil pocket.
Preferably, the gate gurgle valve includes chock plug, sealing ring and block bead；Chock plug is threaded in the bottom sides of pedestal,
And sealed by sealing ring, front end end contacts with block bead, block bead is pressed on the wall surface of asphalt channel C, to block
Asphalt channel C, after chock plug is screwed out one section, block bead is movable, and asphalt channel C is opened.
Preferably, one end of the asphalt channel A and asphalt channel B extends to pedestal side surface, and is equipped with and blocks up channel
The plug of plug.
Preferably, the jack further includes seal guide sleeve, pressing ring, pressing ring sealing ring and guide sleeve；Oil cylinder and shell
Lower end is respectively welded on pedestal in corresponding groove, and seal guide sleeve nested encryptions pass through several welding in cylinder upper end
Point positions cylinder upper end, and seal guide sleeve welds together with upper shell；Seal guide sleeve upper end is equipped with internal screw thread；Piston
Component is located in oil cylinder, and from stretching out and being located in the inner hole of pressing ring in oil cylinder, pressing ring is in the sleeve shaped of both ends open for the upper end,
Outer rim is equipped with annular convex platform, is connected on seal guide sleeve by the external screw thread of lower end；Guide sleeve by pressing ring sealing ring and
Pressing ring is mounted between seal guide sleeve and piston component.
Preferably, cylinder upper end is equipped with annular convex platform, and seal guide sleeve nested encryptions are on the annular convex platform of cylinder upper end.
Preferably, the annular convex platform of pressing ring is equipped with the hole being inserted into for spanner.
Preferably, it at the nested encryptions of the cylinder upper end and seal guide sleeve, is uniformly distributed there are four pad.
Preferably, it at the nested encryptions of the cylinder upper end and seal guide sleeve, is additionally provided with for fixing cylinder upper end
Connecting pin.
Preferably, weld together on the outside of seal guide sleeve with upper shell.
By adopting the above-described technical solution, compared with prior art, the present invention increases in existing hydraulic jack
Reflux asphalt channel and safety valve, and will the setting of reflux asphalt channel existing asphalt channel A and asphalt channel B it
Between, reflux of the hydraulic oil from buffering oil pocket to shoe cream room is realized using existing asphalt channel A, is guaranteeing hydraulic jack not
It can be more than maximum load, while trouble free service, also achieve the most short, most simplified of oil circuit, not only save processing cost, also
Shorten the reaction time that hydraulic jack withstands on hydraulic oil in hydraulic jack when safety valve is opened.Meanwhile the present invention also overcomes
Caused by existing full welding type jack directly welds together cylinder upper end and upper shell full cylinder upper end by
Thermal deformation increases the gap between cylinder upper end and piston component, it is caused to jack the deficiency that tilting load ability reduces, and existing
The full welded type hydraulic jack having compares, and oil cylinder uses intermittent type to weld (point due to not welding directly with shell
Weld) seal guide sleeve is located in cylinder upper end, and fixed by connecting pin, then seal guide sleeve and upper shell are welded
It connects, so as to avoid cylinder wall temperature distortion, the wall thickness of oil cylinder can be reduced, moreover it is possible to guarantee its processing and assembly precision, thus
It improves it and jacks tilting load ability, effectively mitigate the own wt of jack.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the schematic diagram of base structure of the embodiment of the present invention one；
Fig. 3 is the A-A cross-sectional view of Fig. 2；
Fig. 4 is the B-B cross-sectional view of Fig. 2；
Fig. 5 is the C-C cross-sectional view of Fig. 2；
Fig. 6 is the D-D cross-sectional view of Fig. 2；
Fig. 7 is the E-E cross-sectional view of Fig. 2；
Fig. 8 is the schematic diagram of one asphalt channel of the embodiment of the present invention；
Fig. 9 is the structural schematic diagram of the embodiment of the present invention two；
Figure 10 is the F-F cross-sectional view of Fig. 9；
Figure 11 is the G-G cross-sectional view of Fig. 9；
Figure 12 is the H-H cross-sectional view of Fig. 9；
Figure 13 is the J-J cross-sectional view of Fig. 9；
Figure 14 is the K-K cross-sectional view of Fig. 9；
Figure 15 is the schematic diagram of two asphalt channel of the embodiment of the present invention.
Specific embodiment
Embodiment 1
As shown in Figure 1, a kind of welded type hydraulic jack with safety valve, including pedestal 1, is mounted on pedestal 1
It shell 2, the oil cylinder 3 in shell 2, the piston component 4 in oil cylinder 3 and is mounted on pedestal 1 and oils pump assembly 5.Pedestal
1, it is equipped with shoe cream room 6 between shell 2 and oil cylinder 3, working oil chamber 7 is equipped between pedestal 1, oil cylinder 2 and piston component 4, on pedestal 1
It is additionally provided with buffering oil pocket 8；Connected between shoe cream room 6, working oil chamber 7 and buffering oil pocket 8 by the asphalt channel being located on pedestal 1
It is logical.
As shown in Fig. 2-Fig. 8, the asphalt channel including connection shoe cream room 6 and buffers the asphalt channel A9 of oil pocket 8, connects
Meet the asphalt channel B10 of buffering oil pocket 8 and working oil chamber 7 and the asphalt channel C11 of connection working oil chamber 7 and shoe cream room 6；Oil circuit
Channel A9 is upwardly formed asphalt channel AA131 after extending to 8 lower section of buffering oil pocket from shoe cream room 6, and asphalt channel AA131 is connected to
Buffer the bottom (as shown in Figure 6) of oil pocket 8；It is horizontal after asphalt channel B10 extends to buffering 8 side-lower of oil pocket from working oil chamber 7
Direction extends to below buffering oil pocket 8 and forms asphalt channel BA101, forms asphalt channel BB102, asphalt channel then up
BB102 is connected to the bottom (as shown in Figure 5, Figure 7) of buffering oil pocket 8；Be additionally provided on pedestal 1 check valve A12, check valve B13 and
Gate gurgle valve 14；Check valve A12 is located at asphalt channel AA131 and buffers the intersection of oil pocket 8, so that oil pressure liquid is in asphalt channel A9
In be only capable of one-way flow, circulating direction is shoe cream room 6 to the direction (as shown in Figure 4) of buffering oil pocket 8；Check valve B13 is located at oil
The intersection of paths B10 and asphalt channel BA101, so that oil pressure liquid is only capable of one-way flow, circulation side in asphalt channel B10
To being buffering oil pocket 8 to the direction of working oil chamber 7；Gate gurgle valve 14 is arranged on asphalt channel C11, control asphalt channel C11's
Opening and closing (as shown in Figure 3)；Reflux asphalt channel 15 is additionally provided on pedestal, reflux asphalt channel 15 is by asphalt channel
AA131 is connected to (as shown in Figure 4) with asphalt channel BB102；The asphalt channel 15 that flows back is equipped with safety valve 16, and when normal work pacifies
Full valve 16 is closed, and when being more than maximum load, safety valve 16 is opened, i.e. reflux asphalt channel 15 is opened, and is connected to asphalt channel
AA131 and asphalt channel BB102, to be connected to buffering oil pocket 8 and shoe cream room 6.
As shown in figure 4, the safety valve 16 includes pressure regulating screw 161, safety valve spring 162, safety valve steel ball 163, valve
Pearl seat 164, safe valve seals 165 and safety valve capping 166, pressure regulating screw 161 is sealingly mounted at the bottom sides of pedestal 1,
And it is sealed by safe valve seals, and including safety valve spring 162 and safety valve steel ball 163 are blocked, safety valve spring 162
One end contacted with pressure regulating screw 161, the other end is contacted with valve pearl seat 164, and valve pearl seat 164 is contacted with safety valve steel ball 163, peace
Full valve capping 166 is mounted on 161 outside of pressure regulating screw；Safety valve steel ball 163 is pressed on back by safety valve spring 162 by elastic force
On the wall surface for flowing asphalt channel 15, so that reflux asphalt channel 15 is blocked, when oil pressure liquid overcomes elastic force to open safety valve steel ball 163
When, gap is formed between safety valve steel ball 163 and the wall surface for the asphalt channel 15 that flows back, reflux asphalt channel 15 is opened, oil circuit is led to
Road AA131 is connected to asphalt channel BB102.
As shown in figure 4, the check valve B13 includes plug 131, spring 132 and steel ball 133, plug 131 is sealingly mounted at
The bottom sides of pedestal 1, and then by including spring 132 and the closure of steel ball 133, one end of spring 132 is contacted with plug 131, separately
One end is contacted with steel ball 133, and steel ball 133 is pressed on the wall surface of asphalt channel BA101 by elastic force, so that it is logical to block oil circuit
Road B10 forms gap when oil pressure liquid overcomes elastic force to open steel ball 133 between steel ball 133 and the wall surface of asphalt channel BA101, oil
Paths B10 is opened, and oil pressure liquid flows to working oil chamber 7 from buffering oil pocket 8.
As shown in figure 3, the gate gurgle valve 14 includes chock plug 141, sealing ring 142 and block bead 143；Chock plug 141 is threadedly coupled
It is sealed in the bottom sides of pedestal 1, and by sealing ring 142, front end end is contacted with block bead 143, and block bead 143 is pressed on
On the wall surface of asphalt channel C11, to block asphalt channel C11, after chock plug 141 is screwed out one section, block bead 143 is movable, oil
Paths C11 is opened.
One end of the asphalt channel A9 and asphalt channel B10 extends to 1 side surface of pedestal, and is equipped with channel blockage
Plug 17.
The jack further includes seal guide sleeve 18, pressing ring 19, pressing ring sealing ring 20 and guide sleeve 21.Oil cylinder 3 and shell 2
Lower end be respectively welded on pedestal 1 in corresponding groove, 3 upper end of oil cylinder is equipped with annular convex platform, and seal guide sleeve 18 is nested in
On the annular convex platform of 3 upper end of oil cylinder, and 3 upper end of oil cylinder is positioned by four uniformly distributed pads, 18 outside of seal guide sleeve
Weld together with 2 upper end of shell.18 upper end of seal guide sleeve is equipped with internal screw thread.Piston component 4 is located in oil cylinder 3, the upper end
From stretching out and being located in the inner hole of pressing ring 19 in oil cylinder 3, pressing ring 19 is in the sleeve shaped of both ends open, and outer rim is equipped with convex annular
Platform, the annular convex platform of pressing ring are equipped with the hole being inserted into for spanner, are connected on seal guide sleeve 18 by the external screw thread of lower end.
Guide sleeve 21 is mounted between seal guide sleeve 18 and piston component 4 by pressing ring sealing ring 20 and pressing ring 19.3 upper end of oil cylinder with
At the nested encryptions of seal guide sleeve 18, it is additionally provided with the connecting pin 22 for fixing 3 upper end of oil cylinder.
In normal work, safety valve 16 is in close state welded type hydraulic jack with safety valve always；It is first
Negative pressure is first formed in buffering oil pocket 8, check valve A12 is opened, and check valve B13 is closed, and hydraulic oil is from shoe cream room 6 successively through oil circuit
Channel A9, asphalt channel AA131 and check valve A12 enter buffering oil pocket 8；Then make to buffer and form positive pressure in oil pocket 8, unidirectionally
Valve A12 is closed, and check valve B13 is opened, and hydraulic oil is from buffering oil pocket 8 successively through asphalt channel BB102, asphalt channel BA101, list
Working oil chamber 7 is entered to valve B13 and asphalt channel B10, and the piston component 4 of 7 top of working oil chamber is jacked up, completes jacking
Operation.When hydraulic jack reaches maximum load, negative pressure is first formed in buffering oil pocket 8, check valve A12 is opened, check valve
B13 is closed, and hydraulic oil successively enters buffering oil through asphalt channel A9, asphalt channel AA131 and check valve A12 from shoe cream room 6
Chamber 8, safety valve 16 is still in closed state at this time；When buffering formation positive pressure in oil pocket 8, since cavity pressure has been more than peace
The setting value of full valve 16, safety valve 16 are opened, i.e. reflux asphalt channel 15 is opened, by asphalt channel AA131 and asphalt channel
BB102 connection, i.e. buffering oil pocket 8 are connected to shoe cream room 6, since the pressure in working oil chamber 7 at this time is greater than asphalt channel BA101
Interior pressure, check valve B13 will not be opened, therefore hydraulic oil can not flow into working oil chamber 7 from buffering oil pocket 8, but successively be passed through
Asphalt channel BB102, reflux asphalt channel 15, asphalt channel AA131 and asphalt channel A9 flow back into shoe cream room 6, when pressure reaches
To after balance, safety valve 16 is again switched off.
Embodiment 2
As shown in Figure 1, a kind of welded type hydraulic jack with safety valve, including pedestal 1, is mounted on pedestal 1
It shell 2, the oil cylinder 3 in shell 2, the piston component 4 in oil cylinder 3 and is mounted on pedestal 1 and oils pump assembly 5.Pedestal
1, it is equipped with shoe cream room 6 between shell 2 and oil cylinder 3, working oil chamber 7 is equipped between pedestal 1, oil cylinder 2 and piston component 4, on pedestal 1
It is additionally provided with buffering oil pocket 8；Connected between working oil chamber 7, buffering oil pocket 8 and shoe cream room 6 by the asphalt channel being located on pedestal 1
It is logical.
As shown in Fig. 9-15, the asphalt channel includes connecting shoe cream room 6 and buffering the asphalt channel A9 of oil pocket 8, connect
Buffer the asphalt channel B10 of oil pocket 8 and working oil chamber 7 and the asphalt channel C11 of connection working oil chamber 7 and shoe cream room 6；Oil circuit is logical
Road A9 is upwardly formed asphalt channel AB92 after extending to 8 lower section of buffering oil pocket from shoe cream room 6, and is connected to the bottom of buffering oil pocket 8
Portion (as shown in figure 14)；Asphalt channel B10 is upwardly formed asphalt channel after extending to 8 lower section of buffering oil pocket from working oil chamber 7
BC103, and it is connected to the bottom (as shown in figure 13) of buffering oil pocket 8；Be additionally provided on pedestal 1 check valve A12, check valve B13 and
Gate gurgle valve 14；Check valve A12 is located at asphalt channel AB92 and buffers the intersection of oil pocket 8, so that oil liquid is in asphalt channel A9
It is only capable of one-way flow, circulating direction is shoe cream room 6 to the direction of buffering oil pocket 8；Check valve B13 is located at asphalt channel B10 and work
Make the intersection of oil pocket 7, so that oil liquid is only capable of one-way flow in asphalt channel B10, circulating direction is to buffer oil pocket 8 to work
The direction of oil pocket 7；Gate gurgle valve 14 is arranged on asphalt channel C11, controls the opening and closing of asphalt channel C11；On pedestal also
Equipped with reflux asphalt channel 15, one end of reflux asphalt channel 15 is directly connected to shoe cream room 6, the other end and asphalt channel
BC103 connection (as shown in figures 9 and 11)；The asphalt channel 15 that flows back is equipped with safety valve 16, and safety valve 16 closes when normal work
It closes, when being more than maximum load, safety valve 16 is opened, i.e. reflux asphalt channel 15 is opened, connection buffering oil pocket 8 and shoe cream room 6.
As shown in figure 11, the safety valve 16 includes pressure regulating screw 161, safety valve spring 162, safety valve steel ball 163, valve
Pearl seat 164, safe valve seals 165 and safety valve capping 166, pressure regulating screw 161 is sealingly mounted at the bottom sides of pedestal 1,
And it is sealed by safe valve seals, and including safety valve spring 162 and safety valve steel ball 163 are blocked, safety valve spring 162
One end contacted with pressure regulating screw 161, the other end is contacted with valve pearl seat 164, and valve pearl seat 164 is contacted with safety valve steel ball 163, peace
Full valve capping 166 is mounted on 161 outside of pressure regulating screw；Safety valve steel ball 163 is pressed on back by safety valve spring 162 by elastic force
On the wall surface for flowing asphalt channel 15, so that reflux asphalt channel 15 is blocked, when oil liquid overcomes elastic force to open safety valve steel ball 163
When, gap is formed between safety valve steel ball 163 and the wall surface for the asphalt channel 15 that flows back, reflux asphalt channel 15 is opened, by buffering oil
Chamber 8 is connected to shoe cream room 6.
As shown in Figure 10, the check valve B13 includes plug 131, spring 132 and steel ball 133, the sealing installation of plug 131
In the bottom sides of pedestal 1, and then by including spring 132 and the closure of steel ball 133, one end of spring 132 is contacted with plug 131,
The other end is contacted with steel ball 133, steel ball 133 is pressed on the wall surface of asphalt channel BA101 by elastic force, to block oil circuit
Channel B10 forms gap, oil circuit when oil liquid overcomes elastic force to open steel ball 133 between steel ball 133 and the wall surface of asphalt channel B10
Channel B10 is opened, and oil liquid flows to working oil chamber 7 from buffering oil pocket 8.
As shown in Figure 10, the gate gurgle valve 14 includes chock plug 141, sealing ring 142 and block bead 143；Chock plug 141 is threadedly coupled
It is sealed in the bottom sides of pedestal 1, and by sealing ring 142, front end end is contacted with block bead 143, and block bead 143 is pressed on
On the wall surface of asphalt channel C11, to block asphalt channel C11, after chock plug 141 is screwed out one section, block bead 143 is movable, oil
Paths C11 is opened.
One end of the asphalt channel A9 and asphalt channel B10 extends to 1 side surface of pedestal, and is equipped with channel blockage
Plug 17.
The jack further includes seal guide sleeve 18, pressing ring 19, pressing ring sealing ring 20 and guide sleeve 21.Oil cylinder 3 and shell 2
Lower end be respectively welded on pedestal 1 in corresponding groove, 3 upper end of oil cylinder is equipped with annular convex platform, and seal guide sleeve 18 is nested in
On the annular convex platform of 3 upper end of oil cylinder, and 3 upper end of oil cylinder is positioned by four uniformly distributed pads, 18 outside of seal guide sleeve
Weld together with 2 upper end of shell.18 upper end of seal guide sleeve is equipped with internal screw thread.Piston component 4 is located in oil cylinder 3, the upper end
From stretching out and being located in the inner hole of pressing ring 19 in oil cylinder 3, pressing ring 19 is in the sleeve shaped of both ends open, and outer rim is equipped with convex annular
Platform, the annular convex platform of pressing ring are equipped with the hole being inserted into for spanner, are connected on seal guide sleeve 18 by the external screw thread of lower end.
Guide sleeve 21 is mounted between seal guide sleeve 18 and piston component 4 by pressing ring sealing ring 20 and pressing ring 19.3 upper end of oil cylinder with
At the nested encryptions of seal guide sleeve 18, it is additionally provided with the connecting pin 22 for fixing 3 upper end of oil cylinder.
In normal work, safety valve 16 is in close state welded type hydraulic jack with safety valve always；It is first
Negative pressure is first formed in buffering oil pocket 8, check valve A12 is opened, and check valve B13 is closed, and hydraulic oil is from shoe cream room 6 successively through oil circuit
Channel A9, asphalt channel AB92 and check valve A12 enter buffering oil pocket 8；Then make to buffer and form positive pressure in oil pocket 8, unidirectionally
Valve A12 is closed, and check valve B13 is opened, and hydraulic oil is from buffering oil pocket 8 successively through asphalt channel BC103, asphalt channel B10 and list
Working oil chamber 7 is entered to valve B13, and the piston component 4 of 7 top of working oil chamber is jacked up, completes jacking operation.When hydraulic thousand
When jin top reaches maximum load, negative pressure is first formed in buffering oil pocket 8, check valve A12 is opened, and check valve B13 is closed, hydraulic oil
Buffering oil pocket 8 successively is entered through asphalt channel A9, asphalt channel AB92 and check valve A12 from shoe cream room 6, at this time safety valve 16
It is still in closed state；When buffering formation positive pressure in oil pocket 8, since cavity pressure has been more than the setting value of safety valve 16,
Safety valve 16 is opened, i.e. reflux asphalt channel 15 is opened, and buffering oil pocket 8 is connected to shoe cream room 6, due to working oil chamber 7 at this time
Interior pressure is greater than the pressure in asphalt channel B10, and check valve B13 will not be opened, therefore hydraulic oil can not be flowed from buffering oil pocket 8
Enter working oil chamber 7, but successively flow back into shoe cream room 6 through asphalt channel BC103 and reflux asphalt channel 15 from buffering oil pocket 8,
After pressure reaches balance, safety valve 16 is again switched off.
The present invention is not limited to above-mentioned preferred embodiment, and anyone should learn that is made under the inspiration of the present invention
Structure change, it is all that there is same or similar technical solution with of the invention, it all belongs to the scope of protection of the present invention.
Claims (10)
1. a kind of welded type hydraulic jack with safety valve including pedestal, the shell being mounted on the base, is located in shell
Oil cylinder, positioned at in-oil cylinder piston component and be mounted on the base oil pump component；Oil storage is equipped between pedestal, shell and oil cylinder
Chamber is equipped with working oil chamber, is additionally provided with buffering oil pocket on pedestal between pedestal, oil cylinder and piston component；Working oil chamber, buffering oil pocket
It is connected between shoe cream room by the asphalt channel being located on pedestal, the asphalt channel includes connection shoe cream room and buffering oil pocket
Asphalt channel A, connection buffering oil pocket and working oil chamber asphalt channel B and connect working oil chamber and shoe cream room asphalt channel
C；Check valve A, check valve B and gate gurgle valve are additionally provided on pedestal；Check valve A is located on asphalt channel A, so that oil liquid is logical in oil circuit
One-way flow is only capable of in road A, circulating direction is the direction that shoe cream room extremely buffers oil pocket；Check valve B is located on asphalt channel B, with
Oil liquid is set to be only capable of one-way flow in asphalt channel B, circulating direction is to buffer oil pocket to the direction of working oil chamber；Gate gurgle valve setting
On asphalt channel C, the opening and closing of asphalt channel C are controlled；It is characterized in that：Reflux asphalt channel is additionally provided on pedestal,
One end of the reflux asphalt channel is connected to asphalt channel A, and tie point is between shoe cream room and check valve A, the other end and
Asphalt channel B connection, and tie point is between buffering oil pocket and check valve B；Safety valve setting is on reflux asphalt channel, normally
Safety valve is closed when work, and when being more than maximum load, safety valve is opened, i.e. reflux asphalt channel is opened, so that asphalt channel A
It is connected to asphalt channel B, i.e. buffering oil pocket is connected to shoe cream room.
2. the welded type hydraulic jack according to claim 1 with safety valve, it is characterised in that：The reflux oil circuit
One end of the channel is directly connected to shoe cream room, and the other end is connect with buffering oil pocket or asphalt channel B, and tie point is located at check valve B
Between buffering oil pocket；Safety valve setting is on reflux asphalt channel, and safety valve is closed when normal work, when being more than maximum load
When, safety valve is opened, i.e. reflux asphalt channel is opened, so that shoe cream room is connected to buffering oil pocket or asphalt channel B.
3. the welded type hydraulic jack according to claim 1 with safety valve, it is characterised in that：The asphalt channel
A is upwardly formed asphalt channel AA after extending to below buffering oil pocket from shoe cream room, and asphalt channel AA is connected to the bottom of buffering oil pocket
Portion；Asphalt channel B from working oil chamber extend to buffering oil pocket side-lower after, horizontal direction extend to buffering oil pocket be formed immediately below
Asphalt channel BA, forms asphalt channel BB then up, and asphalt channel BB is connected to the bottom of buffering oil pocket；Flow back asphalt channel
One end connect with asphalt channel AA, the other end is connect with asphalt channel BB；Check valve A is located at asphalt channel AA and buffering oil pocket
Intersection, check valve B is located at the intersection of asphalt channel B and asphalt channel BA, and safety valve setting is on reflux asphalt channel；
When normal work, safety valve is closed；When being more than maximum load, safety valve is opened, i.e. reflux asphalt channel is opened, so that oil circuit
Channel AA is connected to asphalt channel BB, i.e. buffering oil pocket is connected to shoe cream room.
4. the welded type hydraulic jack according to claim 2 with safety valve, it is characterised in that：The asphalt channel
A is upwardly formed asphalt channel AB after extending to below buffering oil pocket from shoe cream room, and asphalt channel AB is connected to the bottom of buffering oil pocket
Portion；Asphalt channel B is upwardly formed asphalt channel BC after extending to below buffering oil pocket from working oil chamber, and asphalt channel BC is connected to
Buffer the bottom of oil pocket；One end of reflux asphalt channel is connect with shoe cream room, and the other end is connect with asphalt channel BA；Check valve A
Positioned at the intersection of asphalt channel AB and buffering oil pocket, check valve B is located at the intersection of asphalt channel B and working oil chamber, safety
Valve setting is on reflux asphalt channel；Safety valve is closed when normal work；When being more than maximum load, safety valve is opened, that is, is returned
It flows asphalt channel to open, so that shoe cream room is connected to asphalt channel BA, i.e., shoe cream room is connected to buffering oil pocket.
5. having the welded type hydraulic jack of safety valve in -4 described in any one according to claim 1, it is characterised in that：
The safety valve includes that pressure regulating screw, safety valve spring, safety valve steel ball, valve pearl seat, safe valve seals and safety valve cover,
Pressure regulating screw is sealingly mounted at the bottom sides of pedestal, and is sealed by safe valve seals, and then by safety valve spring and peace
Including full valve steel ball blocks, one end of safety valve spring is contacted with pressure regulating screw, and the other end and valve pearl seated connection touch, safety valve steel ball
It is touched with valve pearl seated connection, safety valve capping is mounted on the outside of pressure regulating screw；Safety valve spring is compressed safety valve steel ball by elastic force
On the wall surface of reflux asphalt channel, so that reflux asphalt channel is blocked, when oil liquid overcomes elastic force to open safety valve steel ball, peace
Gap is formed between full valve steel ball and the wall surface for the asphalt channel that flows back, reflux asphalt channel is opened, buffering oil pocket and shoe cream room are connected
It is logical.
6. having the welded type hydraulic jack of safety valve in -4 described in any one according to claim 1, it is characterised in that：
The check valve B includes plug, spring and steel ball, and plug is sealingly mounted at the bottom sides of pedestal, and then by spring and steel ball
Including closure, spring one end is contacted with plug, and the other end is contacted with steel ball, and steel ball is pressed on asphalt channel B's by elastic force
On wall surface, to block asphalt channel B, when oil liquid overcomes elastic force to open steel ball, formed between steel ball and the wall surface of asphalt channel B
Gap, asphalt channel B are opened, and oil liquid flows to working oil chamber from buffering oil pocket.
7. having the welded type hydraulic jack of safety valve in -4 described in any one according to claim 1, it is characterised in that：
The gate gurgle valve includes chock plug, sealing ring and block bead；Chock plug is threaded in the bottom sides of pedestal, and close by sealing ring
Envelope, front end end contacts with block bead, block bead is pressed on the wall surface of asphalt channel C, to block asphalt channel C, will fill in
After head screws out one section, block bead is movable, and asphalt channel C is opened.
8. having the welded type hydraulic jack of safety valve in -4 described in any one according to claim 1, it is characterised in that：
One end of the asphalt channel A and asphalt channel B extends to pedestal side surface, and is equipped with the plug of channel blockage；Described thousand
Jin top further includes seal guide sleeve, pressing ring, pressing ring sealing ring and guide sleeve；The lower end of oil cylinder and shell is respectively welded at phase on pedestal
In the groove answered, seal guide sleeve nested encryptions position cylinder upper end in cylinder upper end, and by several pads, and sealing is led
Weld together to set with upper shell；Seal guide sleeve upper end is equipped with internal screw thread；Piston component is located in oil cylinder, the upper end from
It stretches out and is located in the inner hole of pressing ring in oil cylinder, pressing ring is in the sleeve shaped of both ends open, and outer rim is equipped with annular convex platform, is led to
The external screw thread for crossing lower end is connected on seal guide sleeve；Guide sleeve is mounted on seal guide sleeve and work by pressing ring sealing ring and pressing ring
Between plug assembly.
9. the welded type hydraulic jack according to claim 8 with safety valve, it is characterised in that：Cylinder upper end is equipped with
Annular convex platform, on the annular convex platform of cylinder upper end, the annular convex platform of pressing ring is equipped with for spanner seal guide sleeve nested encryptions
The hole of insertion.
10. having the welded type hydraulic jack of safety valve according to any one in claim 8 or 9, feature exists
In：It at the nested encryptions of the cylinder upper end and seal guide sleeve, is uniformly distributed there are four pad, and is equipped with and is used for fixing oil
The connecting pin of cylinder upper end.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611208500 | 2016-12-23 | ||
| CN201611208500X | 2016-12-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108821168A true CN108821168A (en) | 2018-11-16 |
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ID=64154690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711262087.XA Pending CN108821168A (en) | 2016-12-23 | 2017-12-04 | A kind of welded type hydraulic jack with safety valve |
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| Country | Link |
|---|---|
| CN (1) | CN108821168A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110304574A (en) * | 2019-07-04 | 2019-10-08 | 嘉兴金日升工具有限公司 | The slow drop jack of vertical oil pressure |
| CN112093702A (en) * | 2020-10-13 | 2020-12-18 | 衡阳市雄焱工具有限公司 | Jack with double high pressure one-way valve |
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| CN1182047A (en) * | 1996-11-11 | 1998-05-20 | Mvp(香港)工业有限公司 | Hydraulic jack loop system capable of positioning in one step |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110304574A (en) * | 2019-07-04 | 2019-10-08 | 嘉兴金日升工具有限公司 | The slow drop jack of vertical oil pressure |
| CN112093702A (en) * | 2020-10-13 | 2020-12-18 | 衡阳市雄焱工具有限公司 | Jack with double high pressure one-way valve |
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Application publication date: 20181116 |