CN205852687U - A kind of plunger displacement pump valve seat withdrawing device - Google Patents
A kind of plunger displacement pump valve seat withdrawing device Download PDFInfo
- Publication number
- CN205852687U CN205852687U CN201620685812.9U CN201620685812U CN205852687U CN 205852687 U CN205852687 U CN 205852687U CN 201620685812 U CN201620685812 U CN 201620685812U CN 205852687 U CN205852687 U CN 205852687U
- Authority
- CN
- China
- Prior art keywords
- valve seat
- silk braid
- displacement pump
- dowel steel
- plunger displacement
- 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.)
- Active
Links
Abstract
The utility model discloses a kind of plunger displacement pump valve seat withdrawing device, belong to oilfield machinery field.This device includes: dowel steel, baffle plate, top cover, force silk braid, afterburning handle；Threadeding with the internal thread hole of plunger displacement pump valve seat outer end in one end of dowel steel, baffle plate, top cover, force silk braid are sequentially sleeved on dowel steel, and baffle plate, top cover all can slide axially along dowel steel, and force silk braid is threadeded with dowel steel；Afterburning handle is fixed on the lateral wall of force silk braid, is used for rotating force silk braid.The plunger displacement pump valve seat withdrawing device that this utility model provides has simple in construction, time saving and energy saving, smooth operation, the feature of use safe and reliable, easy to spread.
Description
Technical field
This utility model relates to oilfield machinery field, particularly to a kind of plunger displacement pump valve seat withdrawing device.
Background technology
During oil-field flooding, it usually needs utilize plunger displacement pump the water filling of internal system to be pressurized to more than 25MPa, so
After reinject in oil reservoir.Wherein, the plunger in plunger displacement pump moves back and forth in cylinder body, makes the volume of seal operation cavity volume become
Changing and realize absorbing water filling, then high pressure extrudes the purpose of water filling.But during plunger displacement pump back and forth runs, entering of plunger displacement pump
Liquid valve, liquid valve, valve block spring, the parts such as O RunddichtringO of valve seat are susceptible to abrasion, affect oil-field flooding operation, and
These parts are arranged in the inner chamber of plunger displacement pump, and plunger displacement pump valve seat is positioned at the inside of plunger displacement pump pump head, and is positioned at plunger displacement pump
The outside in chamber, it is therefore desirable to often plunger displacement pump valve seat is taken out, the parts changed the most again or keep in repair on plunger displacement pump, and then make
It meets oil-field flooding operation.Additionally, be usually provided with an internal thread hole in the outer end of plunger displacement pump valve seat, in order to mobile, peace
Dress or dismounting plunger displacement pump valve seat.Visible, it is provided that a kind of device that can take out plunger displacement pump valve seat is the most necessary.
Prior art mainly makes plunger displacement pump pump head and plunger by hammer plunger displacement pump pump head or plunger displacement pump valve seat
The generation gap, junction of pump valve seat, takes out plunger displacement pump valve seat further；Or use crowbar to be prized by plunger displacement pump valve seat.
Designer finds that prior art at least there is problems in that
The mode using hammer or crowbar to prize takes out plunger displacement pump valve seat easily makes the part on plunger displacement pump damage
Bad, and unloading process short time consumption is long, operating difficulties, there is potential safety hazard.
Utility model content
In order to solve problem of the prior art, this utility model embodiment provide a kind of take-down time short, easy to operate,
Safe and reliable plunger displacement pump valve seat withdrawing device.Described technical scheme is as follows:
This utility model provides a kind of plunger displacement pump valve seat withdrawing device, and described device includes: dowel steel, baffle plate, top cover,
Force silk braid, afterburning handle；Threaded with the internal thread hole of plunger displacement pump valve seat outer end in one end of described dowel steel, described gear
Plate, described top cover, described force silk braid are sequentially sleeved on described dowel steel, and described baffle plate, described top cover all can be along described
Dowel steel slides axially, and described force silk braid is threadeded with described dowel steel；Described afterburning handle is fixed on described force silk
On the lateral wall of set, it is used for rotating described force silk braid.
Specifically, as preferably, valve seat linkage section that described dowel steel includes being sequentially connected with, light bar segment, silk braid linkage section；
First suitable with the female thread in the internal thread hole of described plunger displacement pump valve seat outer end it is provided with on described valve seat linkage section
External screw thread；Second external screw thread suitable with the female thread of described force silk braid it is provided with on described silk braid linkage section.
Specifically, as preferably, the free end of described valve seat linkage section is tapered.
Specifically, as preferably, described device includes that multiple adjustment jackscrew, described adjustment jackscrew include that nut is with described
The screw rod that nut is supporting；The middle part of described baffle plate is provided with the first through hole, for through described dowel steel；Described baffle plate is with described
Being provided with multiple tapped through hole on the plate body that plunger displacement pump valve seat outer end contacts, described screw rod is with described tapped through hole screw thread even
Connect.
Specifically, as preferably, described device also includes that pad, described pad are sleeved on described dowel steel, and are positioned at
Between described top cover and described force silk braid.
Specifically, as preferably, described pad is disc, and middle part is provided with for through the of described dowel steel
Two through holes.
Specifically, as preferably, described device includes 2 described afterburning handles, and one end of 2 described afterburning handles is vertical
Be fixed on the lateral wall that described force silk braid is relative.
Specifically, as preferably, described afterburning handle and described force silk braid are welded and fixed.
Specifically, as preferably, described force silk braid is hex nut.
Specifically, as preferably, described first externally threaded external diameter is 10-14mm, described plunger displacement pump valve seat outer end
The internal diameter of internal thread hole is 11-15mm, and described second externally threaded external diameter is 18-22mm, and the internal diameter of described force silk braid is 19-
23mm, a diameter of 18-22mm of described smooth bar segment, the internal diameter of described top cover is 19-23mm.
The technical scheme that this utility model embodiment provides has the benefit that
The plunger displacement pump valve seat withdrawing device that this utility model provides, during taking out plunger displacement pump valve seat, first will pass
Threadeding with the internal thread hole of plunger displacement pump valve seat outer end in one end of power bar, and then dowel steel and plunger displacement pump valve seat is fixed,
Then baffle plate through dowel steel and is attached on the end face of plunger displacement pump pump head, top cover and force silk braid are sequentially enclosed within dowel steel
On, then the afterburning handle on rotation urging silk braid lateral wall, makes dowel steel be able to eat power, is rotated further afterburning handle, top cover,
On the premise of baffle plate and force silk braid position are fixed, dowel steel drives plunger displacement pump valve seat to move axially outward, can be taken off plunger
Pump valve seat.Wherein, rotation urging silk braid and by active force screw-driven to dowel steel, further take out plunger displacement pump valve seat, this
The mode of kind greatly reduces the time of labour force and dismounting, and originally three personal uses 1.5h could take out plunger displacement pump valve seat, uses
After the device that this utility model provides, personal use 15min just can be taken off plunger displacement pump valve seat.By arranging baffle plate, top cover just
In dismounting plunger displacement pump valve seat during smoothly operate, arrange simultaneously top cover can also withstand force silk braid make its position protect
Hold constant, and then can make the active force of force silk braid is converted into the power making dowel steel move axially outward.Visible, this reality
With the plunger displacement pump valve seat withdrawing device of novel offer have simple in construction, time saving and energy saving, smooth operation, safe and reliable, be prone to push away
The wide feature used.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in this utility model embodiment, required in embodiment being described below
Accompanying drawing to be used is briefly described, it should be apparent that, the accompanying drawing in describing below is only realities more of the present utility model
Execute example, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to these accompanying drawings
Obtain other accompanying drawing.
Fig. 1 is the structural representation of a kind of plunger displacement pump valve seat withdrawing device that this utility model embodiment provides；
Fig. 2 is the structural representation of the dowel steel that the another embodiment of this utility model provides；
Fig. 3 is the structural representation of the baffle plate that the another embodiment of this utility model provides；
Fig. 4 is exert a force silk braid and the structural representation of afterburning handle combination that the another embodiment of this utility model provides；
Fig. 5 is the structural representation adjusting jackscrew that the another embodiment of this utility model provides；
Fig. 6 is the structural representation of the pad that the another embodiment of this utility model provides.
Wherein, reference represents respectively:
1 dowel steel,
101 valve seat linkage sections,
102 smooth bar segment,
103 silk braid linkage sections,
2 baffle plates,
201 first through holes,
202 tapped through holes,
3 top covers,
4 force silk braids,
5 afterburning handles,
6 adjust jackscrew,
601 nuts,
602 screw rods,
7 pads,
701 second through holes,
8 plunger displacement pump valve seats,
9 plunger displacement pump pump heads.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, new to this practicality below in conjunction with accompanying drawing
Type embodiment is described in further detail.
This utility model embodiment provides a kind of plunger displacement pump valve seat withdrawing device, and as shown in Figure 1, this device includes:
Dowel steel 1, baffle plate 2, top cover 3, force silk braid 4, afterburning handle 5.One end of dowel steel 1 is interior with plunger displacement pump valve seat 8 outer end
Screwed hole is threaded, and baffle plate 2, top cover 3, force silk braid 4 are sequentially sleeved on dowel steel 1, and baffle plate 2, top cover 3 all can be along biographies
Power bar 1 slides axially, and force silk braid 4 is threadeded with dowel steel 1.Afterburning handle 5 is fixed on the lateral wall of force silk braid 4,
For rotating force silk braid 4.
The plunger displacement pump valve seat withdrawing device that this utility model provides, during taking out plunger displacement pump valve seat 8, first will pass
Threaded with the internal thread hole of plunger displacement pump valve seat 8 outer end in one end of power bar 1, and then by solid to dowel steel 1 and plunger displacement pump valve seat 8
Fixed, then baffle plate 2 through dowel steel 1 and is attached on the end face of plunger displacement pump pump head 9, top cover 3 and force silk braid 4 are sequentially enclosed within
On dowel steel 1, then the afterburning handle 5 on rotation urging silk braid 4 lateral wall, makes dowel steel 1 be able to eat power, is rotated further afterburning handle
Hands 5, on the premise of top cover 3, baffle plate 2 and force silk braid 4 position are fixing, dowel steel 1 drives plunger displacement pump valve seat 8 axially outward
Motion, can be taken off plunger displacement pump valve seat 8.Wherein, rotation urging silk braid 4 and by active force screw-driven to dowel steel 1, further
Taking out plunger displacement pump valve seat 8, this mode greatly reduces the time of labour force and dismounting, and originally three personal uses 1.5h just can take
Going out plunger displacement pump valve seat 8, after using the device that this utility model provides, personal use 15min just can be taken off plunger displacement pump valve seat 8.
By arranging baffle plate 2, top cover 3 be easy to dismounting plunger displacement pump valve seat 8 during smoothly operate, top cover 3 is set simultaneously and also may be used
Make its position keep constant withstanding force silk braid 4, and then can make the active force of force silk braid 4 is converted into and makes dowel steel 1
The power moved axially outward.Visible, the plunger displacement pump valve seat withdrawing device that this utility model provides has simple in construction, save time province
Power, smooth operation, the feature of use safe and reliable, easy to spread.
Specifically, as shown in Figure 2, dowel steel 1 includes being sequentially connected with valve seat linkage section 101, light bar segment 102, silk braid
Linkage section 103；It is provided with suitable with the female thread in the internal thread hole of plunger displacement pump valve seat 8 outer end on valve seat linkage section 101
The first external screw thread；It is provided with on silk braid linkage section 103 and the second external screw thread that the female thread of the silk braid 4 that exerts a force is suitable.Passing
Valve seat linkage section 101 and the first external screw thread are set on power bar 1, it is simple to dowel steel 1 removes and installs with plunger displacement pump valve seat 8；If
Put light bar segment 102 and be easy to baffle plate 2 and top cover 3 is enclosed within dowel steel 1 glossily, and the most smooth and easy along top cover 3 of dowel steel 1 can be made
Ground slides；Silk braid linkage section 103 is set and the second external screw thread silk braid 4 of being easy to exert a force is enclosed within silk braid linkage section 103 and carries out screw thread
Rotate, and then transmit the force to dowel steel 1.In more detail, the free end of valve seat linkage section 101 is tapered, and this is easy to valve seat
Linkage section 101 can be smoothly inserted in the internal thread hole of plunger displacement pump valve seat 8 outer end.
Wherein, the first externally threaded external diameter is 10-14mm, for example, 10mm, 11mm, 12mm, 13mm, 14mm etc., plunger
The internal diameter of the internal thread hole of pump valve seat 8 outer end is 11-15mm, for example, 11mm, 12mm, 13mm, 14mm, 15mm etc., so
The internal diameter size of the internal thread hole arranging the first externally threaded external diameter and plunger displacement pump valve seat 8 outer end is easy to the valve on dowel steel 1
Seat linkage section 101 and the internal thread hole threaded engagement of plunger displacement pump valve seat 8 outer end, it is simple to dowel steel 1 is torn open with plunger displacement pump valve seat 8
Unload and install.
Second externally threaded external diameter is 18-22mm, for example, 18mm, 19mm, 20mm, 21mm, 22mm etc., and exert a force silk braid 4
Internal diameter be 19-23mm, for example, 19mm, 20mm, 21mm, 22mm, 23mm etc., be arranged such the second externally threaded external diameter and executing
The size of power silk braid 4 internal diameter is easy to silk braid linkage section 103 and force silk braid 4 threaded engagement, simultaneously the force silk braid 4 of dowel steel 1
Internal diameter more bigger than the second externally threaded external diameter, it is simple to force silk braid 4 rotate at the silk braid linkage section 103 of dowel steel 1.
A diameter of 18-22mm of light bar segment 102, for example, 18mm, 19mm, 20mm, 21mm, 22mm etc., the internal diameter of top cover 3
For 19-23mm, for example, 19mm, 20mm, 21mm, 22mm, 23mm etc., it is arranged such the diameter of light bar segment 102 and the interior of top cover 3
Footpath size is easy to be enclosed within top cover 3 the light bar segment 102 of dowel steel 1, light bar segment 102 can be made to occur inside top cover 3 axially simultaneously
Slide.
Specifically, baffle plate 2 can be circular slab, square plate, triangular plate etc., arranges baffle plate 2 and is easy to block plunger displacement pump
The end face of pump head 9, the most also can fix the position of top cover 3.As preferably, as shown in Figure 3, baffle plate 2 is circular slab, circular slab
Can completely fit with the end face of plunger displacement pump pump head 9, make the top cover 3 top power equilibrium to baffle plate 2 simultaneously, and then can smoothly take out
Plunger displacement pump valve seat 8.Wherein, the middle part of baffle plate 2 is provided with the first through hole 201, for through dowel steel 1；Baffle plate 2 and plunger pump valve
It is provided with multiple tapped through hole 202 on the plate body that seat 8 outer ends contact；The device that this utility model embodiment provides also includes
Multiple adjustment jackscrews 6, as shown in Figure 5, adjust jackscrew 6 and include the screw rod 602 that nut 601 is supporting with nut 601；Screw rod 602
Threaded with tapped through hole 202.It is arranged such baffle plate 2 to be conveniently adjusted jackscrew 6 with the structure adjusting jackscrew 6 and be fixed on baffle plate 2
On, adjust the degree of depth of tapped through hole 202 on jackscrew 6 precession entrance baffle plate 2 by changing, can change what baffle plate 2 was contacted with it
Distance between plunger displacement pump valve seat 8 outer end, and then make baffle plate 2 be mutually perpendicular to dowel steel 1, the axial location making dowel steel 1 is steady
Fixed, can smoothly take out plunger displacement pump valve seat 8 further.In more detail, the first through hole 201 that the middle part of baffle plate 2 is arranged is permissible
For circle, square, regular hexagon, dodecagon etc., be arranged such the shape of the first through hole 201, it is simple to make dowel steel 1 with
The way of contact between first through hole 201 is linear contact lay or face contact, and then can be with the axial location of righting dowel steel 1.As
Preferably, the first through hole 201 is circular, and this can make the way of contact between dowel steel 1 with the first through hole 201 be that face contacts, enter
And can the axial location of preferably righting dowel steel 1.
Specifically, as shown in Figure 4, the plunger displacement pump valve seat withdrawing device that this utility model embodiment provides includes that 2 add
One end of 5,2 afterburning handles 5 of power handle is vertically fixed on the lateral wall that force silk braid 4 is relative, is arranged such and facilitates work
People applies active force to afterburning handle 5.Wherein, afterburning handle 5 and force silk braid 4 are welded and fixed, and this makes afterburning handle 5 and force
Attachment force between silk braid 4 is strong, during the plunger displacement pump valve seat withdrawing device using this utility model to provide, will not occur
The potential safety hazards such as afterburning handle 5 comes off.As preferably, afterburning handle 5 being provided with decorative pattern, this is easy to increase hands and afterburning handle
Frictional force between 5, thus reduce skidding.As preferably, force silk braid 4 is hex nut, the inside one of hex nut
As be provided with female thread, decrease the manufacturing step of device that this utility model embodiment provides, the valency of hex nut simultaneously
Lattice are cheap, easily obtain.
Specifically, the plunger displacement pump valve seat withdrawing device that this utility model embodiment provides also includes that pad 7, pad 7 are set with
On dowel steel 1, and between top cover 3 and force silk braid 4, pad 7 is set and can prevent the silk braid 4 abrasion to top cover 3 that exerts a force,
Improve the service life of top cover 3.Wherein, as shown in Figure 6, pad 7 in disc, and be provided with in the middle part of pad 7 for
Through the second through hole 701 of dowel steel 1, this is easy to make the end face of the pad 7 and top cover 3 being enclosed within dowel steel 1 to completely attach to, from
And the end face preferably avoiding top cover 3 is worn.In more detail, the shape of the second through hole 701 can be circular, square
Shape, regular hexagon, dodecagon etc., this be easy to make the way of contact between the second through hole 701 and dowel steel 1 be linear contact lay or
Face contacts, and then makes pad 7 keep vertical state with dowel steel 1, it is simple to the end face of top cover 3 protected by pad 7.As preferably,
Second through hole 701 is circular, and this can make the way of contact between dowel steel 1 with the second through hole 701 be that face contacts, and then permissible
Preferably protect the end face of top cover 3.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all in this practicality
Within novel spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in guarantor of the present utility model
Within the scope of protecting.
Claims (10)
1. a plunger displacement pump valve seat withdrawing device, it is characterised in that described device includes: dowel steel, baffle plate, top cover, force silk
Set, afterburning handle；
Threaded with the internal thread hole of plunger displacement pump valve seat outer end in one end of described dowel steel, described baffle plate, described top cover, institute
State force silk braid to be sequentially sleeved on described dowel steel, and described baffle plate, described top cover all can slide axially along described dowel steel,
Described force silk braid is threadeded with described dowel steel；
Described afterburning handle is fixed on the lateral wall of described force silk braid, is used for rotating described force silk braid.
Device the most according to claim 1, it is characterised in that valve seat linkage section that described dowel steel includes being sequentially connected with,
Light bar segment, silk braid linkage section；
It is provided with suitable with the female thread in the internal thread hole of described plunger displacement pump valve seat outer end on described valve seat linkage section
First external screw thread；
Second external screw thread suitable with the female thread of described force silk braid it is provided with on described silk braid linkage section.
Device the most according to claim 2, it is characterised in that the free end of described valve seat linkage section is tapered.
Device the most according to claim 1, it is characterised in that described device includes multiple adjustment jackscrew, described adjustment top
Silk includes the screw rod that nut is supporting with described nut；
The middle part of described baffle plate is provided with the first through hole, for through described dowel steel；
Be provided with multiple tapped through hole with described plunger displacement pump valve seat outer end on the plate body that described baffle plate contacts, described screw rod with
Described tapped through hole is threaded.
Device the most according to claim 1, it is characterised in that described device also includes that pad, described pad are sleeved on institute
State on dowel steel, and between described top cover and described force silk braid.
Device the most according to claim 5, it is characterised in that described pad is disc, and middle part be provided with for
The second through hole through described dowel steel.
Device the most according to claim 1, it is characterised in that described device includes 2 described afterburning handles, described in 2
One end of afterburning handle is vertically fixed on the lateral wall that described force silk braid is relative.
Device the most according to claim 1, it is characterised in that described afterburning handle and described force silk braid are welded and fixed.
Device the most according to claim 1, it is characterised in that described force silk braid is hex nut.
Device the most according to claim 2, it is characterised in that described first externally threaded external diameter is 10-14mm, described
The internal diameter of the internal thread hole of plunger displacement pump valve seat outer end is 11-15mm, and described second externally threaded external diameter is 18-22mm, described
The internal diameter of force silk braid is 19-23mm, and a diameter of 18-22mm of described smooth bar segment, the internal diameter of described top cover is 19-23mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620685812.9U CN205852687U (en) | 2016-06-30 | 2016-06-30 | A kind of plunger displacement pump valve seat withdrawing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620685812.9U CN205852687U (en) | 2016-06-30 | 2016-06-30 | A kind of plunger displacement pump valve seat withdrawing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205852687U true CN205852687U (en) | 2017-01-04 |
Family
ID=57645781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620685812.9U Active CN205852687U (en) | 2016-06-30 | 2016-06-30 | A kind of plunger displacement pump valve seat withdrawing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205852687U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108422382A (en) * | 2018-05-08 | 2018-08-21 | 河南森源电气股份有限公司 | A kind of small spout clamp device of breaker |
| CN108527245A (en) * | 2018-06-19 | 2018-09-14 | 泰州市铧颐特种装备有限公司 | A kind of piston pin backing-out punch |
| CN112677104A (en) * | 2020-12-15 | 2021-04-20 | 中国石油天然气集团有限公司 | Device for taking out hydraulic end gland of plunger pump of well cementation cement truck and using method |
-
2016
- 2016-06-30 CN CN201620685812.9U patent/CN205852687U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108422382A (en) * | 2018-05-08 | 2018-08-21 | 河南森源电气股份有限公司 | A kind of small spout clamp device of breaker |
| CN108422382B (en) * | 2018-05-08 | 2023-11-21 | 河南森源电气股份有限公司 | Breaker small nozzle fastening device |
| CN108527245A (en) * | 2018-06-19 | 2018-09-14 | 泰州市铧颐特种装备有限公司 | A kind of piston pin backing-out punch |
| CN112677104A (en) * | 2020-12-15 | 2021-04-20 | 中国石油天然气集团有限公司 | Device for taking out hydraulic end gland of plunger pump of well cementation cement truck and using method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205852687U (en) | A kind of plunger displacement pump valve seat withdrawing device | |
| CN204700813U (en) | The manual bracket system of a kind of jack | |
| CN203269459U (en) | Hydraulic jack with stable base | |
| CN206263872U (en) | A kind of labour-saving built-in bearing extracting tool | |
| CN203542523U (en) | Novel pumping unit crank pin bush extractor | |
| CN203335873U (en) | Built-in packing gland type high-pressure stop valve | |
| CN204942952U (en) | A kind of security protection camera being convenient to install | |
| CN103737290A (en) | Device for dismounting small-end oil film bearing of roll box of Morgan fifth-generation high-speed wire rod mill | |
| CN203442064U (en) | Bi-directional ratchet mechanism | |
| CN104443368B (en) | By the electric brake actuator that force snesor and ball-screw are integrated | |
| CN104030187A (en) | Device supporting mechanism suitable for uneven ground | |
| CN204300024U (en) | A kind of intelligent Bidirectional piston type oil cylinder | |
| CN103089834A (en) | Throttler | |
| CN203845746U (en) | Jacking device | |
| CN203845748U (en) | Device supporting seat | |
| CN203845747U (en) | Device supporting seat suitable for uneven ground | |
| CN204312454U (en) | The fixed anti-loosening device of piston of easy care steel ball easy to process | |
| CN205061456U (en) | Screw jack | |
| CN204284553U (en) | A kind of novel stop check valve | |
| CN204729539U (en) | There is the bellows expansion core body of buffer unit | |
| CN203685133U (en) | Anti-theft pressure bar device for beam-pumping unit | |
| CN203716995U (en) | Foot valve for upright post of coal mine hydraulic support | |
| CN202966269U (en) | Position limiting device for supporting leg supporting feet disc | |
| CN212240803U (en) | Hinged wrench | |
| CN202992539U (en) | Adjustable iron pad |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |