CN113338623A - Pressure compensation device for concrete pumping - Google Patents
Pressure compensation device for concrete pumping Download PDFInfo
- Publication number
- CN113338623A CN113338623A CN202110609492.4A CN202110609492A CN113338623A CN 113338623 A CN113338623 A CN 113338623A CN 202110609492 A CN202110609492 A CN 202110609492A CN 113338623 A CN113338623 A CN 113338623A
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- Prior art keywords
- fixed
- joint
- compression
- cylinder
- pipe
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
- E04G21/0418—Devices for both conveying and distributing with distribution hose
Abstract
The invention provides a pressure compensation device for concrete pumping. The pressure compensation device for concrete pumping comprises a conveying pipe; a joint; the discharging mechanism is fixed on the side wall of the joint; a compression mechanism; the adjusting mechanism comprises a groove, a connecting plate, a connecting rod, a sliding chute, a fixed ball and a fixed block, the fixed block is arranged at the joint of the discharging mechanism and the compression mechanism, the connecting plate is arranged in the discharging mechanism, the groove is arranged in the middle of the inside of the connecting plate, and the connecting rod is arranged at the bottom end of the groove; the sliding groove is arranged between the connecting plate and the fixed block, the inner part of the sliding groove and the side wall of the connecting rod are connected with the fixed ball in a sliding mode, and the fixed ball abuts against the side wall of the fixed block; and a connecting mechanism. The pressure compensation device for concrete pumping provided by the invention has the advantage of improving the concrete conveying efficiency.
Description
Technical Field
The invention relates to the technical field of pumping concrete, in particular to a pressure compensation device for concrete pumping.
Background
The concrete is pumped, and concrete of mixture can be conveyed by a concrete pump through a pipeline. The requirement is that the fluidity is good, the particle size of the aggregate is generally not more than one fourth of the pipe diameter, a pumping agent for preventing the segregation and the blockage of the concrete mixture in a pumping pipeline and an additive for enabling the concrete mixture to smoothly pass under the pumping pressure are added, and a water reducing agent, a plasticizing agent, an air entraining agent, a thickening agent and the like can be used as the pumping agent. The addition of proper amount of mixed material, such as flyash, can avoid the separation of mixed material, water bleeding and blocking of conveying pipeline. In the raw material of the pumping concrete, pebbles are preferably used as the coarse aggregate.
When the concrete is pumped, the friction between the concrete and the pipe wall and the viscosity force of the concrete cause the concrete to flow in the pipeline, so that the pressure loss exists, and the pressure damage of the concrete at the turning part of the pipeline is large, thereby reducing the efficiency of conveying the concrete.
Therefore, there is a need to provide a new pressure compensation device for concrete pumping to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a concrete pumping pressure compensation device for improving the concrete conveying efficiency.
In order to solve the technical problem, the pressure compensation device for concrete pumping provided by the invention comprises: a delivery pipe; the two ends of the joint are respectively provided with the conveying pipe; the discharging mechanism is fixed on the side wall of the joint; the compression mechanisms are symmetrically and obliquely arranged at the bottom end of the discharging mechanism; the adjusting mechanism comprises a groove, a connecting plate, a connecting rod, a sliding chute, a fixed ball and a fixed block, the fixed block is arranged at the joint of the discharging mechanism and the compression mechanism, the connecting plate is arranged in the discharging mechanism, the groove is arranged in the middle of the inside of the connecting plate, and the connecting rod is arranged at the bottom end of the groove; the sliding groove is arranged between the connecting plate and the fixed block, the inner part of the sliding groove and the side wall of the connecting rod are connected with the fixed ball in a sliding mode, and the fixed ball abuts against the side wall of the fixed block; and the two ends of the connecting mechanism are respectively connected with the compression mechanism and the joint.
Preferably, the discharging mechanism comprises a fixed barrel and a discharging pipe, the fixed barrel is installed on the side wall of the joint, and the discharging pipe in a hollow circular truncated cone shape is installed at the top end of the fixed barrel.
Preferably, the compression mechanism comprises a compression cylinder, a hydraulic cylinder, a piston, a hydraulic rod, a communicating pipe and a limiting block, and the compression cylinder is symmetrically installed at the bottom end of the fixed cylinder; the hydraulic cylinder is installed at the bottom end of the compression cylinder, the hydraulic rod is connected to the interior of the hydraulic cylinder in a sliding mode, the piston is installed at the top end of the hydraulic rod, and the piston and the hydraulic rod are connected to the interior of the compression cylinder in a sliding mode; two install between the bottom of a compression section of thick bamboo communicating pipe, the top internally mounted of a compression section of thick bamboo the stopper, the stopper is contradicted the piston.
Preferably, the compression cylinder and the fixed cylinder are combined into a Y-shaped structure, the fixed block is installed at the joint of the compression cylinder and the fixed cylinder, and the minimum inner diameter of the fixed block is smaller than the diameter of the fixed ball.
Preferably, the inner mounting side wall of the fixed cylinder is an arc-shaped connecting plate, and the width of the sliding groove in the fixed cylinder is equal to the diameter of the fixed ball.
Preferably, the connecting mechanism comprises a connecting pipe and a baffle plate, the connecting pipe with an arc-shaped side wall is arranged in the connector, and the bottom end of the connecting pipe is connected with the side wall of the top end of the compression cylinder; the inside of the compression cylinder is rotatably connected with the baffle, and the baffle is clamped at one end of the connecting pipe.
Preferably, the connecting pipe and the discharging pipe are arranged inside the joint in a staggered mode, and the top end of the connecting pipe is flush with the bottom end inside the joint.
Compared with the related art, the concrete pumping pressure compensation device provided by the invention has the following beneficial effects:
the invention provides a pressure compensation device for concrete pumping, when concrete moves in a conveying pipe and a joint, two compression mechanisms operate, when all the concrete in one compression mechanism enters the joint through a discharge mechanism and the concrete in the other compression mechanism is full, the compression mechanisms reversely operate, one compression mechanism pushes the concrete to enter the discharge mechanism, so that the concrete extrudes a fixed ball, the fixed ball is in an arc structure in a sliding chute, the fixed ball is enabled to move from one fixed block to the top end of the other fixed block in a propping manner, the other fixed block is sealed by the fixed ball, the compression mechanism is conveniently connected with the fixed block to absorb the concrete in the joint, and the concrete entering the fixed block quickly penetrates through a groove and the discharge mechanism to enter the joint The part enables concrete to enter the conveying pipe along the joint, increases the pressure of the concrete in the conveying pipe and facilitates the concrete to rapidly pass through the joint and the conveying pipe; and the two compression mechanisms alternatively extrude the concrete, so that the concrete continuously enters the joint and the conveying pipe, and the efficiency of conveying the concrete by the conveying pipe and the joint is improved.
Drawings
Fig. 1 is a schematic structural diagram of a concrete pumping pressure compensation device provided by the invention;
FIG. 2 is a schematic view of the internal structure of the joint shown in FIG. 1;
FIG. 3 is a schematic illustration of the internal construction of the tapping pipe shown in FIG. 2;
fig. 4 is an enlarged view of the structure at a shown in fig. 2.
Reference numbers in the figures: 1. conveying pipe, 2, joint, 3, coupling mechanism, 31, connecting pipe, 32, baffle, 4, discharge mechanism, 41, fixed section of thick bamboo, 42, discharging pipe, 5, compression mechanism, 51, compression section of thick bamboo, 52, pneumatic cylinder, 53, piston, 54, hydraulic stem, 55, communicating pipe, 56, stopper, 6, adjustment mechanism, 61, recess, 62, connecting plate, 63, connecting rod, 64, spout, 65, fixed ball, 66, fixed block.
Detailed Description
The invention is further described with reference to the following figures and embodiments.
Referring to fig. 1, fig. 2, fig. 3 and fig. 4, fig. 1 is a schematic structural diagram of a pressure compensation device for pumping concrete according to the present invention; FIG. 2 is a schematic view of the internal structure of the joint shown in FIG. 1; FIG. 3 is a schematic illustration of the internal construction of the tapping pipe shown in FIG. 2; fig. 4 is an enlarged view of the structure at a shown in fig. 2. The pressure compensation device for concrete pumping comprises: a delivery pipe 1; the two ends of the joint 2 are respectively provided with the conveying pipe 1; the discharging mechanism 4 is fixed on the side wall of the joint 2; the compression mechanisms 5 are symmetrically and obliquely arranged at the bottom end of the discharging mechanism 4; the adjusting mechanism 6 comprises a groove 61, a connecting plate 62, a connecting rod 63, a sliding chute 64, a fixing ball 65 and a fixing block 66, the fixing block 66 is installed at the joint of the discharging mechanism 4 and the compression mechanism 5, the connecting plate 62 is installed inside the discharging mechanism 4, the groove 61 is arranged in the middle of the inside of the connecting plate 62, and the connecting rod 63 is installed at the bottom end of the groove 61; the sliding groove 64 is arranged between the connecting plate 62 and the fixed block 66, the inner part of the sliding groove 64 and the side wall of the connecting rod 63 are connected with the fixed ball 65 in a sliding manner, and the fixed ball 65 abuts against the side wall of the fixed block 66; and the two ends of the connecting mechanism 3 are respectively connected with the compressing mechanism 5 and the joint 2.
The discharging mechanism 4 comprises a fixed barrel 41 and a discharging pipe 42, the side wall of the joint 2 is provided with the fixed barrel 41, the top end of the fixed barrel 41 is provided with the hollow truncated cone-shaped discharging pipe 42, so that concrete can conveniently penetrate through the fixed barrel 41 and the truncated cone-shaped discharging pipe 42 to rapidly enter the joint 2, and the concrete inside the joint 2 is pushed to rapidly pass through the joint 2, so that the concrete in the conveying pipe 1 is pressurized.
The compression mechanism 5 comprises a compression cylinder 51, a hydraulic cylinder 52, a piston 53, a hydraulic rod 54, a communication pipe 55 and a limiting block 56, wherein the compression cylinder 51 is symmetrically arranged at the bottom end of the fixed cylinder 41; the hydraulic cylinder 52 is arranged at the bottom end of the compression cylinder 51, the hydraulic rod 54 is slidably connected to the inside of the hydraulic cylinder 52, the piston 53 is arranged at the top end of the hydraulic rod 54, and the piston 53 and the hydraulic rod 54 are slidably connected to the inside of the compression cylinder 51; the communication pipe 55 is installed between the bottom ends of the two compression cylinders 51, the limit block 56 is installed inside the top end of the compression cylinder 51, the limit block 56 abuts against the piston 53, in order to facilitate the operation of the hydraulic rod 52 to drive the hydraulic rod 54 to continuously extend and compress inside the compression cylinder 51, so as to drive the piston 53 to continuously move up and down inside the compression cylinder 51, when the piston 53 moves up, the piston 53 pushes concrete to be discharged from the inside of the compression cylinder 51, when the piston 53 moves down, the piston 53 generates suction inside the compression cylinder 51 to drive the concrete to enter inside the compression cylinder 51, and the communication pipe 55 communicates the inside of the two compression cylinders 51, so as to facilitate the air to flow between the two compression cylinders 51, and the limit block 56 abuts against the piston 53, the movement distance of the piston 53 is limited.
The compression cylinder 51 and the fixed cylinder 41 are combined into a Y-shaped structure, the fixed block 66 is installed at the joint of the compression cylinder 51 and the fixed cylinder 41, the minimum inner diameter of the fixed block 66 is smaller than the diameter of the fixed ball 65, so that the fixed block 66 is closed for the convenience of moving the fixed ball 65, the top end of one fixed cylinder 51 is closed, and the two fixed cylinders 51 can be operated alternately to compress concrete.
The inner mounting side wall of the fixed cylinder 41 is the arc-shaped connecting plate 62, the width of the sliding groove 64 inside the fixed cylinder 41 is equal to the diameter of the fixed ball 65, so that the fixed ball 65 moves in an arc shape along the direction of the sliding groove 64 conveniently, the connecting rod 63 blocks the fixed ball 65 to be discharged from the inside of the groove 61, and the fixed ball 65 moves in an arc shape along the groove sliding groove 64.
The connecting mechanism 3 comprises a connecting pipe 31 and a baffle 32, the connecting pipe 31 with an arc-shaped side wall is arranged in the joint 2, and the bottom end of the connecting pipe 31 is connected with the side wall of the top end of the compression cylinder 51; the inside of the compression cylinder 51 is rotatably connected with the baffle 32, the baffle 32 is clamped with one end of the connecting pipe 31, in order that when the piston 53 pushes the concrete to be discharged from the interior of the compression cylinder 51, the concrete moves upward in the interior of the compression cylinder 51 to push the baffle 32 to rotate upward to close the connecting pipe 31, when the piston 53 moves downwards to generate suction inside the compression cylinder 51, the baffle 32 rotates downwards to open the connection pipe 31, so that the concrete inside the joint 2 enters the inside of the compression cylinder 51 through the connection pipe 31, the connecting pipe 31 and the discharging pipe 42 are arranged in a staggered manner inside the joint 2, the top end of the connecting pipe 31 is flush with the bottom end inside the joint 2, when the concrete moves into the inside of the joint 2, the concrete is convenient to enter the inside of the compression cylinder 51 through the connection pipe 31 with the arc-shaped side wall.
The working principle of the pressure compensation device for concrete pumping provided by the invention is as follows: when the concrete moves in the conveying pipe 1 and the joint 2, the hydraulic cylinder 52 is externally connected with a power supply, and the hydraulic rod 52 operates to drive the hydraulic rod 54 to continuously extend and compress in the compression cylinder 51, so as to drive the piston 53 to continuously move up and down in the compression cylinder 51. When one of the pistons 53 moves against the fixed block 66, the other piston 53 moves to the lowest end of the compression cylinder 51, and the piston 53 changes the moving direction; the piston 53 moves upward to push the concrete inside the compression cylinder 51 to move upward to contact with the fixing ball 65, so that the fixing ball 65 forms an arc structure inside the chute 64, the fixing ball 65 is abutted against the top end of one fixing block 66 to move to the top end of the other fixing block 66, the fixing ball 65 closes the other fixing block 66, when the piston 53 moves downward to generate suction inside the compression cylinder 51, the fixing block 66 at the top end of the compression cylinder 51 is closed by the fixing ball 65, the suction inside the compression cylinder 51 generates suction to rotate the baffle 32 downward, the connecting pipe 31 is opened, and the concrete inside the joint 2 enters the compression cylinder 51 through the connecting pipe 31. The concrete extruded upwards by the piston 53 penetrates through the groove 61 and enters the inside of the fixed cylinder 41, and the concrete penetrates through the fixed cylinder 41 and the truncated cone-shaped discharge pipe 42 and rapidly enters the inside of the joint 2, so that the concrete inside the joint 2 is pushed to rapidly pass through the joint 2, and the concrete in the delivery pipe 1 is pressurized. As the two pistons 53 alternatively press the concrete, the concrete continuously enters the joint 2 and the interior of the conveying pipe 1, and the efficiency of conveying the concrete by the conveying pipe 1 and the joint 2 is improved.
Compared with the related art, the concrete pumping pressure compensation device provided by the invention has the following beneficial effects:
the invention provides a pressure compensation device for concrete pumping, when concrete moves in a conveying pipe 1 and a joint 2, two compression mechanisms 5 operate, when the concrete in one compression mechanism 5 completely enters the joint 2 through a discharge mechanism 4 and the concrete in the other compression mechanism 5 is full, the compression mechanisms 5 reversely operate, one compression mechanism 5 pushes the concrete to enter the discharge mechanism 4, so that the concrete extrudes a fixed ball 65, the fixed ball 65 is in an arc structure in a chute 64, the fixed ball 65 is abutted to move from one fixed block 66 to the top end of the other fixed block 66, the fixed ball 65 seals the other fixed block 66, and the compression mechanism 5 connected with the fixed block 66 is convenient to absorb the concrete in the joint 2, the concrete entering the fixing block 66 quickly penetrates through the groove 61 and the discharging mechanism 4 to enter the joint 2, so that the concrete enters the conveying pipe 1 along the joint 2, the pressure of the concrete inside the conveying pipe 1 is increased, and the concrete can conveniently and quickly pass through the joint 2 and the conveying pipe 1; with the two compressing mechanisms 5 alternatively extruding the concrete, the concrete continuously enters the joint 2 and the conveying pipe 1, and the efficiency of conveying the concrete by the conveying pipe 1 and the joint 2 is improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. A pressure compensating device for concrete pumping, comprising:
a delivery pipe (1);
the two ends of the joint (2) are respectively provided with the conveying pipe (1);
the discharging mechanism (4), the discharging mechanism (4) is fixed on the side wall of the joint (2);
the compression mechanisms (5), the compression mechanisms (5) are symmetrically and obliquely arranged at the bottom end of the discharging mechanism (4);
the adjusting mechanism (6) comprises a groove (61), a connecting plate (62), a connecting rod (63), a sliding groove (64), a fixed ball (65) and a fixed block (66), the fixed block (66) is installed at the joint of the discharging mechanism (4) and the compression mechanism (5), the connecting plate (62) is installed inside the discharging mechanism (4), the groove (61) is arranged in the middle of the inside of the connecting plate (62), and the connecting rod (63) is installed at the bottom end of the groove (61); the sliding groove (64) is arranged between the connecting plate (62) and the fixing block (66), the inner part of the sliding groove (64) and the side wall of the connecting rod (63) are in sliding connection with the fixing ball (65), and the fixing ball (65) abuts against the side wall of the fixing block (66);
the two ends of the connecting mechanism (3) are respectively connected with the compressing mechanism (5) and the joint (2).
2. Pressure compensating device of concrete pumping according to claim 1, characterized in that the tapping mechanism (4) comprises a fixed barrel (41) and a tapping pipe (42), the fixed barrel (41) is mounted on the side wall of the adapter (2), and the tapping pipe (42) is mounted on the top end of the fixed barrel (41) in the shape of a hollow truncated cone.
3. The concrete pumping pressure compensation device according to claim 2, wherein the compression mechanism (5) comprises a compression cylinder (51), a hydraulic cylinder (52), a piston (53), a hydraulic rod (54), a communicating pipe (55) and a limiting block (56), and the compression cylinder (51) is symmetrically installed at the bottom end of the fixed cylinder (41); the hydraulic cylinder (52) is installed at the bottom end of the compression cylinder (51), the hydraulic rod (54) is slidably connected to the inside of the hydraulic cylinder (52), the piston (53) is installed at the top end of the hydraulic rod (54), and the piston (53) and the hydraulic rod (54) are slidably connected to the inside of the compression cylinder (51); two install between the bottom of compression section of thick bamboo (51) communicating pipe (55), the top internally mounted of compression section of thick bamboo (51) stopper (56), stopper (56) contradict piston (53).
4. The concrete pumping pressure compensation device according to claim 3, wherein the compression cylinder (51) and the fixed cylinder (41) are combined into a Y-shaped structure, the fixed block (66) is installed at the joint of the compression cylinder (51) and the fixed cylinder (41), and the minimum inner diameter of the fixed block (66) is smaller than the diameter of the fixed ball (65).
5. Pressure compensating means for concrete pumping according to claim 2, characterized in that the internal mounting side wall of the fixed cylinder (41) is the arc-shaped connecting plate (62), and the width of the chute (64) inside the fixed cylinder (41) is equal to the diameter of the fixed ball (65).
6. The concrete pumping pressure compensating device according to claim 3, wherein the connecting mechanism (3) comprises a connecting pipe (31) and a baffle (32), the connecting pipe (31) with the arc-shaped inner mounting side wall of the joint (2) is arranged, and the bottom end of the connecting pipe (31) is connected with the top end side wall of the compression cylinder (51); the interior of the compression cylinder (51) is rotatably connected with the baffle plate (32), and the baffle plate (32) is clamped with one end of the connecting pipe (31).
7. Pressure compensating device of concrete pumping according to claim 6, characterized in that the connecting pipe (31) and the tapping pipe (42) are arranged staggered inside the joint (2) and the top end of the connecting pipe (31) is flush with the inside bottom end of the joint (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110609492.4A CN113338623A (en) | 2021-06-01 | 2021-06-01 | Pressure compensation device for concrete pumping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110609492.4A CN113338623A (en) | 2021-06-01 | 2021-06-01 | Pressure compensation device for concrete pumping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113338623A true CN113338623A (en) | 2021-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110609492.4A Pending CN113338623A (en) | 2021-06-01 | 2021-06-01 | Pressure compensation device for concrete pumping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113338623A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1177393A (en) * | 1995-02-07 | 1998-03-25 | 乌尔里克·赫德尔梅尔 | Method and device for feeding concrete or other thick materials |
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| CN2921282Y (en) * | 2006-05-04 | 2007-07-11 | 赵雪阳 | Differential pressure combined valve |
| CN201050455Y (en) * | 2006-09-22 | 2008-04-23 | 黄华卿 | Bi-directional manual pump possessing minisize direction control valve |
| CN101476554A (en) * | 2009-01-15 | 2009-07-08 | 上海隧道工程股份有限公司 | Shield tunneling synchronous mud injecting pump |
| CN202023797U (en) * | 2011-05-06 | 2011-11-02 | 三一重工股份有限公司 | Pumping mechanism and pulse vibration absorption device thereof, and concrete pumping machine |
| CN202047843U (en) * | 2011-05-22 | 2011-11-23 | 丰隆液压有限公司 | Alternating bidirectional control valve |
| CN104769281A (en) * | 2012-08-28 | 2015-07-08 | 格茨·于代尔迈尔 | Thick-matter pump for producing a continuous thick-matter flow and method for operating a thick-matter pump for producing a continuous thick-matter flow |
| CN205714636U (en) * | 2016-03-11 | 2016-11-23 | 湖南金能自动化设备有限公司 | Conveyer device for industrial emulsion explosive |
| CN106968908A (en) * | 2017-03-29 | 2017-07-21 | 曾正兵 | Stable conveying concrete pump and control method |
| CN109296516A (en) * | 2018-11-28 | 2019-02-01 | 福州中机联机电技术有限公司 | A kind of fish oil pumping installations and pumping method |
| CN212374954U (en) * | 2020-05-25 | 2021-01-19 | 山东鹏智环保科技有限公司 | Novel kitchen oil-water separation box |
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2021
- 2021-06-01 CN CN202110609492.4A patent/CN113338623A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1177393A (en) * | 1995-02-07 | 1998-03-25 | 乌尔里克·赫德尔梅尔 | Method and device for feeding concrete or other thick materials |
| KR20030015168A (en) * | 2002-10-21 | 2003-02-20 | 김순길 | Apparatus for pumping concrete of pump vehicle |
| CN2921282Y (en) * | 2006-05-04 | 2007-07-11 | 赵雪阳 | Differential pressure combined valve |
| CN201050455Y (en) * | 2006-09-22 | 2008-04-23 | 黄华卿 | Bi-directional manual pump possessing minisize direction control valve |
| CN101476554A (en) * | 2009-01-15 | 2009-07-08 | 上海隧道工程股份有限公司 | Shield tunneling synchronous mud injecting pump |
| CN202023797U (en) * | 2011-05-06 | 2011-11-02 | 三一重工股份有限公司 | Pumping mechanism and pulse vibration absorption device thereof, and concrete pumping machine |
| CN202047843U (en) * | 2011-05-22 | 2011-11-23 | 丰隆液压有限公司 | Alternating bidirectional control valve |
| CN104769281A (en) * | 2012-08-28 | 2015-07-08 | 格茨·于代尔迈尔 | Thick-matter pump for producing a continuous thick-matter flow and method for operating a thick-matter pump for producing a continuous thick-matter flow |
| CN205714636U (en) * | 2016-03-11 | 2016-11-23 | 湖南金能自动化设备有限公司 | Conveyer device for industrial emulsion explosive |
| CN106968908A (en) * | 2017-03-29 | 2017-07-21 | 曾正兵 | Stable conveying concrete pump and control method |
| CN109296516A (en) * | 2018-11-28 | 2019-02-01 | 福州中机联机电技术有限公司 | A kind of fish oil pumping installations and pumping method |
| CN212374954U (en) * | 2020-05-25 | 2021-01-19 | 山东鹏智环保科技有限公司 | Novel kitchen oil-water separation box |
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Application publication date: 20210903 |
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