CN203297054U - Concrete delivery pump - Google Patents
Concrete delivery pump Download PDFInfo
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- CN203297054U CN203297054U CN2013203520691U CN201320352069U CN203297054U CN 203297054 U CN203297054 U CN 203297054U CN 2013203520691 U CN2013203520691 U CN 2013203520691U CN 201320352069 U CN201320352069 U CN 201320352069U CN 203297054 U CN203297054 U CN 203297054U
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Abstract
The utility model discloses a concrete delivery pump which comprises a frame and a hopper connected to the frame. Two piston-type delivery cylinders capable of alternating feeding are disposed on the frame. Two discharge tubes respectively communicated with the two piston-type delivery cylinders are arranged on the hopper. A drive mechanism for driving a first cylinder core and a second cylinder core is disposed on the front portion of the hopper. A discharge outlet and feed inlet are respectively disposed on the two cylinder cores. When the two cylinder cores rotate, communication and sealing of the two feeding tubes and discharge tubes can be achieved respectively, two hydraulic cylinders and two feed cylinders work alternatively, so that the concrete delivery pump is high in continuity, even in discharge, high in work efficiency, simple in structure and convenient to use.
Description
Technical field
The utility model relates to a kind of concrete pump.
Background technique
concrete pump is the capital equipment in cement concrete machinery, be used for the concrete transportation work of vertical and horizontal direction, has efficiency high, quality is good, but be not subjected to the characteristics such as field condition restriction and environmental contamination reduction when mechanization degree height and operation, yet the hopper of existing concrete transfer pump generally only has a discharge nozzle and an oil hydraulic cylinder, the concrete pump inefficiency of this structure, discharging is inhomogeneous, and continuity is not strong, in existing invention, the concrete pump that two oil hydraulic cylinders are set is arranged also, its piston type carries the cylinder front end that distributing valve is installed, common distributing valve respectively has its pluses and minuses, use very inconvenient.
The model utility content
The technical problems to be solved in the utility model is for above-mentioned defect, and the concrete pump that a kind of discharging is even, continuity is strong is provided.
In order to solve the problems of the technologies described above, the utility model provides a kind of concrete pump with following structure, comprise frame, be connected to the hopper on frame, its structural feature is that described frame is provided with the two-piston formula conveying cylinder that can realize alternately feeding, is respectively to be carried cylinder and by the second piston type of the second Driven by Hydraulic Cylinder, carried cylinder by the first piston formula of the first Driven by Hydraulic Cylinder; The first piston formula is carried on cylinder and is connected with the first discharge nozzle and is communicated with hopper and the first supply pipe of first piston formula conveying cylinder inner chamber, is connected with the second discharge nozzle and connection hopper and the second piston type on the second piston type conveying cylinder and carries the second supply pipe of cylinder inner chamber; The first piston formula is carried in cylinder to be rotatably connected to and can be made the first piston formula carry the cylinder inner chamber to be communicated with the first supply pipe when the first oil hydraulic cylinder retreats and carry the cylinder inner chamber can make the first piston formula carry the cylinder inner chamber to be communicated with the first discharge nozzle when the first oil hydraulic cylinder advances and the first piston formula be carried the first spool of cylinder inner chamber and the cut-off of the first supply pipe with the first discharge nozzle cut-off the first piston formula; The second piston type is carried in cylinder to be rotatably connected to and can be made the second piston type carry the cylinder inner chamber to be communicated with the second supply pipe when the second oil hydraulic cylinder retreats and carry the cylinder inner chamber can make the second piston type carry the cylinder inner chamber to be communicated with the second discharge nozzle when the second oil hydraulic cylinder advances and the second piston type be carried the second spool of cylinder inner chamber and the cut-off of the second supply pipe with the second discharge nozzle cut-off the second piston type; The switch phase of the first spool and the second spool is opposite and by driving mechanism, driven.
Described first piston formula carries cylinder to comprise to be connected on frame and front and back are connected the first front-bank rotor housing and the first rear-bank rotor housing, described the first supply pipe and the first discharge nozzle are communicated with the first front-bank rotor housing inner chamber respectively, and described the first valve core housing is contained in the first front-bank rotor housing; Described the second piston type is carried cylinder to comprise to be connected on frame and front and back are connected the second front-bank rotor housing and the second rear-bank rotor housing, described the second supply pipe and the second discharge nozzle are communicated with the inner chamber of the second front-bank rotor housing respectively, described second valve core retainer plate is contained in the second front-bank rotor housing, it is that two-part form that piston type is carried cylinder, therefore detachable, be convenient to clear up spool, maintenance.
Described the first spool is identical with the second valve cored structure, comprises that all a inner is opened wide and the cylindrical shell of outer end sealing, and cylindrical shell is provided with material feeding mouth and discharge port.
Described driving mechanism comprises and is fixed on the first spool and stretches out the first piston formula and carry the first live axle of cylinder and be fixed on the second spool and stretch out the second piston type and carry the second live axle of cylinder, the first actuation gear is housed on the first live axle, the second actuation gear is housed on the second live axle; Be rotatably connected to the driving gear that meshes simultaneously with the first actuation gear and the second actuation gear on frame, driving gear is by realizing that the power mechanism that comes and goes action drives.
Described power mechanism comprises the oil cylinder that is fixed in the frame front end, and the underpart of the piston rod of described oil cylinder is connected with the tooth bar with the driving gear engagement.
Described oil cylinder comprises cylinder body, two pistons that relatively arrange are housed in cylinder body, are connected with piston rod between two-piston, form two grease chambeies between the outside of two-piston and inboard wall of cylinder block, inboard wall of cylinder block is provided with the oil inlet and outlet that is communicated with two grease chambeies respectively, and described tooth bar is fixed on piston rod.
Be horizontally arranged with the stirring shaft that is driven by power plant in described hopper, be connected with the paddle of Spiral distribution on described stirring shaft.
adopt the concrete pump of such scheme compared with prior art to have the following advantages: hopper is provided with two discharge nozzles that are communicated with two-piston formula conveying cylinder respectively, the hopper front portion is provided with the driving mechanism that drives first core and second core, be respectively equipped with discharge port and material feeding mouth on two cores, when two cores rotate, can realize respectively and two supply pipes, the connection of discharge nozzle and sealing, when the piston rod of the first oil hydraulic cylinder moves backward, a material feeding mouth on first core is communicated with the first supply pipe, discharge port and the sealing of the first discharge nozzle, concrete enters the first piston formula and carries in cylinder, this moment, the piston rod of the second oil hydraulic cylinder travelled forward, the discharge port of the second barrel is communicated with the second discharge nozzle, discharge port and the sealing of the second supply pipe, concrete is discharged from the second discharge nozzle, when the piston rod of the second oil hydraulic cylinder moved backward, the material feeding mouth of the second barrel was communicated with the second supply pipe, discharge port and the sealing of the second discharge nozzle, this moment, the piston rod of the first oil hydraulic cylinder travelled forward, a discharge port on first core is communicated with the first discharge nozzle, material feeding mouth and the sealing of the first supply pipe, and concrete is discharged from the first discharge nozzle, two oil hydraulic cylinders and two core alternations, continuity is strong, and discharge is even, high working efficiency, and simple in structure, easy to use.
Description of drawings
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail:
Fig. 1 is main TV structure schematic diagram of the present utility model;
Fig. 2 is Fig. 1 plan structure schematic diagram;
Fig. 3 be in Fig. 1 B to structural representation;
Fig. 4 be in Fig. 1 A-A to a kind of structural representation of analysing and observe;
Fig. 5 is the structural representation that piston type is carried cylinder and oil hydraulic cylinder;
Fig. 6 is the structural representation of driving mechanism and power mechanism;
Fig. 7 be in 1 A-A to the another kind of structural representation of analysing and observe.
Embodiment
As depicted in figs. 1 and 2, this concrete pump comprises frame 1, is connected to the hopper 4 on frame 1, frame 1 is provided with the wheel 10 that is driven by traveller, be horizontally arranged with the stirring shaft 11 that is driven by power plant in hopper 4, the power plant that drive stirring shaft 11 rotations in the present embodiment are the oil hydraulic motor 13 that is arranged on hopper 4 lateral parts, be connected with the paddle 12 of Spiral distribution on stirring shaft 11, paddle 12 can be even with the concrete-agitating in hopper 4, the two end part of stirring shaft 11 are equipped with respectively bearing, and by end cap, compress.Be provided with the two-piston formula that can realize alternately feeding as Fig. 2, frame shown in Figure 4 and Figure 51 and carry cylinder, the two-piston formula carries cylinder to be set in parallel in the both sides of frame 1, is respectively to be carried cylinder 7 and by the second piston type that the second oil hydraulic cylinder 3 drives, carried cylinder 9 by the first piston formula that the first oil hydraulic cylinder 2 drives; The first piston formula is carried on cylinder 7 the first supply pipe 32, the second piston types that are connected with the first discharge nozzle 31 and connection hopper 4 and first piston formula conveying cylinder inner chamber to carry on cylinders 9 and is connected with the second discharge nozzle 33 and is communicated with hopper 4 and the second supply pipe 34 of the second piston type conveying cylinder 9 inner chambers; Being rotatably connected to the first spool 5, the first spools 5 in first piston formula conveying cylinder 7 can make first piston formula conveying cylinder 7 inner chambers be communicated with the first supply pipe 32 and the first piston formula is carried cylinder 7 inner chambers with the first discharge nozzle 31 cut-offs and can be made the first piston formula carry cylinder 7 inner chambers to be communicated with the first discharge nozzle 31 and first piston formula conveying cylinder 7 inner chambers and the first supply pipe 31 are ended when the first oil hydraulic cylinder 2 advances when the first oil hydraulic cylinder 2 retreats; Being rotatably connected to the second spool 6, the second spools 6 in the second piston type conveying cylinder 9 can make the second piston type conveying cylinder 9 inner chambers be communicated with the second supply pipe 34 and the second piston type is carried cylinder 9 inner chambers with the second discharge nozzle 33 cut-offs and can be made the second piston type carry cylinder 9 inner chambers to be communicated with the second discharge nozzle 33 and the second piston type conveying cylinder 9 inner chambers and the second supply pipe 34 are ended when the second oil hydraulic cylinder 2 advances when the second oil hydraulic cylinder 3 retreats; The switch phase of the first spool 5 and the second spool 6 is opposite and by driving mechanism, driven, the first spool 5 is identical with the second spool 6 structures, comprise that all a inner is opened wide and the cylindrical shell of outer end sealing, the outer wall of cylindrical shell carries cylinder 7 and the second piston type to carry the inwall rotary seal of cylinder 9 to coordinate with the first piston formula, while being valve core rotation, concrete can not enter cylindrical shell and the two-piston formula is carried between cylinder, thereby guarantees that concrete is all sucked and discharges by two oil hydraulic cylinders.cylindrical shell is provided with material feeding mouth 61 and discharge port 62, material feeding mouth 61 on two cylindrical shells and discharge port 62 arrange on the contrary, i.e. as shown in Figure 4 two spools, the material feeding mouth 61 of the first spool 5 is communicated with the first supply pipe 32, the discharge port 62 of the first spool 5 and the first discharge nozzle 31 sealings, be a switch phase of the first spool 5 this moment, the material feeding mouth 61 of the second spool 6 and the second supply pipe 34 sealings, the discharge port 62 of the second spool 6 is communicated with the second discharge nozzle 33, be a switch phase of the second spool this moment, the switch phase that can find out two spools is opposite, after spool is turned an angle by the driving mechanism driving, as shown in Figure 7, the material feeding mouth 61 of the first spool 5 and the first supply pipe 32 sealings, the discharge port 62 of the first spool 5 is communicated with the first discharge nozzle 31, be a switch phase of the first spool 5 this moment, the material feeding mouth 61 of the second spool 6 is communicated with the second supply pipe 34, the discharge port 62 of the second spool 6 and the second discharge nozzle 33 sealings, be a switch phase of the second spool this moment.When driving mechanism drove the first spool 5 and the second spool 6 and rotates simultaneously, the switch phase of the first spool 5 and the second spool 6 remained opposite; In the present embodiment, material feeding mouth 61 is vertical with the center line of discharge port 62, and two spool 90 ° of rotations in left and right, realize that material feeding mouth 61, discharge port 62 are communicated with and sealing with two supply pipes, discharge nozzle.
driving mechanism comprises and is fixed on the first spool 5 and stretches out the first piston formula and carry the first live axle of cylinder 7 and be fixed on the second spool 6 and stretch out the second piston type and carry the second live axle of cylinder 9 as shown in Figure 3 and Figure 6, be equipped with on the first live axle on the first actuation gear 83, the second live axles the second actuation gear 84 is housed, be rotatably connected to the driving gear 82 that meshes simultaneously with the first actuation gear 83 and the second actuation gear 84 on frame 1, driving gear 82 is by realizing that the power mechanism that comes and goes action drives, power mechanism can be two covers, drive respectively the first live axle and the second live axle, power mechanism in the present embodiment is a cover as shown in Figure 3 and Figure 6, comprise the oil cylinder that is fixed in frame 1 front end, the underpart of the piston rod of oil cylinder is connected with the tooth bar 81 with driving gear 82 engagements, the present embodiment mid frame 1 front end is connected with oil cylinder, oil cylinder can be one, also can be two, oil cylinder comprises cylinder body 8, two pistons that relatively arrange are housed in cylinder body 8, be connected with piston rod between two-piston, form two grease chambeies between the outside of two-piston and inboard wall of cylinder block, cylinder body 8 inwalls are provided with the oil inlet and outlet that is communicated with two grease chambeies respectively, tooth bar 81 is fixed on piston rod, driving gear 82 extend in cylinder body 8 and with tooth bar 81 and meshes, when oil body advances from left oil inlet and outlet, piston rod moves right, oil body is discharged from right oil inlet and outlet, when oil body advanced from right oil inlet and outlet, piston rod was moved to the left, and oil body is discharged from left oil inlet and outlet, and the to-and-fro motion of oil cylinder drives driving gear 82 and drives two spool left-right rotation.
As the first front-bank rotor housing 72 and the first rear-bank rotor housing 71 that Fig. 1 and first piston formula shown in Figure 5 carry cylinder 7 to comprise to be connected on frame 1 and front and back are connected, described the first supply pipe 32 and the first discharge nozzle 31 are communicated with the first front-bank rotor housing 72 inner chambers respectively, above-mentioned the first spool 5 is sleeved in the first front-bank rotor housing 72, the connecting end of the first rear-bank rotor housing 71 and the first front-bank rotor housing 72 is connected with respectively dunnage 74, two dunnages 74 and fixes as one by lock bolt; Described the second piston type is carried cylinder 9 to comprise to be connected on frame 1 and front and back are connected the second front-bank rotor housing 92 and the second rear-bank rotor housing 91, described the second supply pipe 34 and the second discharge nozzle 33 are communicated with the inner chamber of the second front-bank rotor housing 92 respectively, the second spool 6 is sleeved in the second front-bank rotor housing 92, the connecting end of the second rear-bank rotor housing 91 and the second front-bank rotor housing 92 is connected with respectively dunnage 74, two dunnages 74 and fixes as one by lock bolt.Fix by the connecting rod that is fixed on frame 1 between two dunnages and support, it is that two-part form that piston type is carried cylinder, therefore detachable, is convenient to clear up spool, maintenance.
The first discharge nozzle 31 and the second discharge nozzle 33 inwardly reduce and form a Y shape discharge nozzle as shown in Figure 4, the Y shape discharge nozzle carries two discharge nozzles of cylinder bottom to be connected by flange with piston type, also can the integrally casting moulding, the Y shape discharge nozzle mouth of pipe connects can be for the pipeline of concrete output.
During work, the piston rod of oil cylinder moves right, driving gear 82 drives the first live axle and the second live axle turns left simultaneously, the first spool 5 and the second spool 6 are turned left simultaneously, this moment, material feeding mouth 61 and first supply pipe 32 of the first spool 5 sealed, the discharge port 62 of the first spool 5 and the first discharge nozzle 31 UNICOMs; The material feeding mouth 61 of the second spool 6 and the second supply pipe 34 UNICOMs, the discharge port 62 of the second spool 6 and the second discharge nozzle 33 sealings, concrete enters into the second piston type and carries cylinder 9 from the second supply pipe 34, the piston rod of the second oil hydraulic cylinder 3 moves backward, the concrete that stirs is drawn onto the second piston type carries the rear portion of cylinder 9, this moment, discharge port 61 and first discharge nozzle 31 of the first spool 5 were UNICOM's state, the piston rod of the first oil hydraulic cylinder 2 moves forward, and concrete is discharged from the first discharge nozzle 31; When the piston rod of oil cylinder is moved to the left, driving gear 82 drives the first live axle and the second live axle turns right simultaneously, the first spool 5 and the second spool 6 are turned right simultaneously, the material feeding mouth 61 of the first spool 5 and the first supply pipe 32 UNICOMs, the discharge port 62 of the first spool 5 and the first discharge nozzle 31 sealings; The material feeding mouth 61 of the second spool 6 and the second supply pipe 34 sealings, the discharge port 62 of the second spool 6 and the second discharge nozzle 33 UNICOMs, concrete enters into the first piston formula from the first supply pipe 32 and carries cylinder 7, the piston rod of the first oil hydraulic cylinder 2 moves backward, the concrete that stirs is drawn onto the first piston formula carries the rear portion of cylinder 7, this moment, discharge port 61 and second discharge nozzle 33 of the second spool 6 were UNICOM's state, the piston rod of the second oil hydraulic cylinder 3 moves forward, and concrete is discharged from the second discharge nozzle 33.Two oil hydraulic cylinders and spool alternation, discharge concrete continuous uniformly.
Two front side edge of frame 1 are connected with the first supporting frame 25 across frame 1, be connected with motor on described the first supporting frame 25, two back side edge of frame 1 are connected with across connecting promising each oil cylinder on the second supporting frame 26, the second supporting frames 26 of frame 1 and carrying cylinder that the hydraulic station of hydraulic power is provided.One sidepiece of frame 1 is equipped with regulator cubicle, controls the operation of the various electrical apparatus element such as each power plant.
Piston type is carried between cylinder and oil hydraulic cylinder can also be equipped with water tank, water in water tank can the cleaning piston formula be carried the interior residue of cylinder, reduces the wearing and tearing of rubber piston, thus the sealing that the assurance piston type is carried cylinder, the mounting type of water tank is prior art, does not repeat them here.
The above is specific constructive form of the present utility model; the utility model is not restricted to the described embodiments;, the art personnel, based on equivalent variations and the parts of concrete structure on the utility model, replace all in protection domain of the present utility model.
Claims (7)
1. concrete pump, comprise frame (1), be connected to the hopper (4) on frame (1), it is characterized in that: described frame (1) is provided with the two-piston formula that can realize alternately feeding and carries cylinder, is respectively to be carried cylinder (7) and by the second piston type that the second oil hydraulic cylinder (3) drives, carried cylinder (9) by the first piston formula that the first oil hydraulic cylinder (2) drives; The first piston formula is carried on cylinder (7) the first supply pipe (32) that is connected with the first discharge nozzle (31) and connection hopper (4) and first piston formula conveying cylinder (7) inner chamber, and the second piston type is carried on cylinder (9) and is connected with the second discharge nozzle (33) and is communicated with hopper (4) and second supply pipe (34) of the second piston type conveying cylinder (9) inner chamber; The first piston formula is carried in cylinder (7) to be rotatably connected at the first oil hydraulic cylinder (2) and can be made the first piston formula carry cylinder (7) inner chamber to be communicated with the first supply pipe (32) while retreating and carry cylinder (7) inner chamber can make the first piston formula carry cylinder (7) inner chamber to be communicated with the first discharge nozzle (31) while advancing and the first piston formula be carried first spool (5) of cylinder (7) inner chamber and the first supply pipe (31) cut-off at the first oil hydraulic cylinder (2) with the first discharge nozzle (31) cut-off the first piston formula; The second piston type is carried in cylinder (9) to be rotatably connected at the second oil hydraulic cylinder (3) and can be made the second piston type carry cylinder (9) inner chamber to be communicated with the second supply pipe (34) while retreating and carry cylinder (9) inner chamber can make the second piston type carry cylinder (9) inner chamber to be communicated with the second discharge nozzle (33) while advancing and the second piston type be carried second spool (6) of cylinder (9) inner chamber and the second supply pipe (34) cut-off at the second oil hydraulic cylinder (3) with the second discharge nozzle (33) cut-off the second piston type; The switch phase of the first spool (5) and the second spool (6) is opposite and by driving mechanism, driven.
2. concrete pump according to claim 1, it is characterized in that: described first piston formula is carried cylinder (7) to comprise and is connected to the first front-bank rotor housing (72) and the first rear-bank rotor housing (71) that frame (1) is upper and front and back are connected, described the first supply pipe (32) and the first discharge nozzle (31) are communicated with the first front-bank rotor housing (72) inner chamber respectively, and described the first spool (5) is sleeved in the first front-bank rotor housing (72); Described the second piston type is carried cylinder (9) to comprise and is connected to the second front-bank rotor housing (92) and the second rear-bank rotor housing (91) that frame (1) is upper and front and back are connected, described the second supply pipe (34) and the second discharge nozzle (33) are communicated with the inner chamber of the second front-bank rotor housing (92) respectively, and described the second spool (6) is sleeved in the second front-bank rotor housing (92).
3. concrete pump according to claim 1 and 2, it is characterized in that: described the first spool (5) is identical with the second spool (6) structure, comprise that all a inner is opened wide and the cylindrical shell of outer end sealing, cylindrical shell is provided with material feeding mouth (61) and discharge port (62).
4. concrete pump according to claim 1 and 2, it is characterized in that: described driving mechanism comprises that to be fixed in the first spool (5) upper and stretch out the first piston formula and carry the first live axle of cylinder (7) and be fixed in the second spool (6) upper and stretch out the second piston type and carry the second live axle of cylinder (9), the first actuation gear (83) is housed on the first live axle, the second actuation gear (84) is housed on the second live axle; Be rotatably connected to the driving gear (82) that meshes simultaneously with the first actuation gear (83) and the second actuation gear (84) on frame (1), driving gear (82) is by realizing that the power mechanism that comes and goes action drives.
5. concrete pump according to claim 4, it is characterized in that: described power mechanism comprises the oil cylinder that is fixed in frame (1) front end, the underpart of the piston rod of described oil cylinder is connected with the tooth bar (81) with driving gear (82) engagement.
6. concrete pump according to claim 5, it is characterized in that: described oil cylinder comprises cylinder body (8), two pistons that relatively arrange are housed in cylinder body (8), be connected with piston rod between two-piston, form two grease chambeies between the outside of two-piston and cylinder body (8) inwall, cylinder body (8) inwall is provided with the oil inlet and outlet that is communicated with two grease chambeies respectively, and described tooth bar (81) is fixed on piston rod.
7. concrete pump according to claim 1, is characterized in that: be horizontally arranged with the stirring shaft (11) that is driven by power plant in described hopper (4), be connected with the paddle (12) of Spiral distribution on described stirring shaft (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203520691U CN203297054U (en) | 2013-06-19 | 2013-06-19 | Concrete delivery pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203520691U CN203297054U (en) | 2013-06-19 | 2013-06-19 | Concrete delivery pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203297054U true CN203297054U (en) | 2013-11-20 |
Family
ID=49573066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203520691U Expired - Fee Related CN203297054U (en) | 2013-06-19 | 2013-06-19 | Concrete delivery pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203297054U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437161A (en) * | 2016-08-31 | 2017-02-22 | 刘祥平 | Concrete cloth device |
| CN110757641A (en) * | 2019-10-25 | 2020-02-07 | 苏师大半导体材料与设备研究院(邳州)有限公司 | Ceramic slurry pumping method |
| CN112879262A (en) * | 2021-03-11 | 2021-06-01 | 中国地质大学（武汉） | Mortar pumping device for in-situ spraying and building repair of comprehensive pipe gallery |
-
2013
- 2013-06-19 CN CN2013203520691U patent/CN203297054U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437161A (en) * | 2016-08-31 | 2017-02-22 | 刘祥平 | Concrete cloth device |
| CN110757641A (en) * | 2019-10-25 | 2020-02-07 | 苏师大半导体材料与设备研究院(邳州)有限公司 | Ceramic slurry pumping method |
| CN112879262A (en) * | 2021-03-11 | 2021-06-01 | 中国地质大学（武汉） | Mortar pumping device for in-situ spraying and building repair of comprehensive pipe gallery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131120 Termination date: 20160619 |