Fixed-length segmented unbonded steel strand opening and closing type oil injection device

Abstract

The utility model discloses a fixed-length segmented unbonded steel strand opening and closing type oil injection device which mainly solves the technical problems that an existing oil injection pipe adopts a penetrating wire inlet mode, interval segmented oil injection cannot be met, grease is easy to extrude out in the working process, and the oil injection effect is poor. According to the technical scheme, the oil filling device is characterized by comprising an open-close type oil filling pipe, a support, an upper driving cylinder and a lower driving cylinder, the upper driving cylinder and the lower driving cylinder are fixedly arranged on the support, the open-close type oil filling pipe comprises an upper pipe body and a lower pipe body which can be buckled, the upper pipe body is fixedly connected with an upper driving cylinder telescopic rod, and the lower pipe body is fixedly connected with a lower driving cylinder telescopic rod; the width of the buckling contact face of the upper pipe body and the lower pipe body is larger than the wall thickness of the upper pipe body and the wall thickness of the lower pipe body, and a sealing gasket is arranged on the buckling contact face.

Description

Technical Field

[0001] The utility model relates to a steel strand oil injection device, in particular to a sizing and segmenting non-bonded steel strand opening and closing type oil injection device. Background Art

[0002] In the production process of the prestressed outer sheath of steel strands, oil injection for steel strands has become an essential process. At present, the oil injection equipment uses an oil injection pipe. The steel strand enters from one end of the oil injection pipe, passes through the oil injection pipe, and exits from the other end of the oil injection pipe. The steel strand is oiled during the movement in the oil injection pipe. However, this is only suitable for the case where the entire steel strand needs to be oiled. The sizing and segmenting non-bonded steel strand refers to a steel strand that is divided into several segments according to a predetermined size, with one segment to be lined with plastic, one segment not to be lined with plastic, one segment to be lined with plastic... for segmented injection molding. The segments that need to be injection molded need to be oiled, while the segments that do not need to be lined with plastic play an anchoring role and cannot be contaminated with grease. At present, for the through-type oil injection method, one end of the steel strand needs to be inserted into the oil injection pipe. After the oil injection section is completed, the steel strand is withdrawn from the oil injection pipe. Then, the other end of the steel strand is inserted into the oil injection pipe. After the oil injection section is completed, the steel strand is withdrawn from the oil injection pipe. In this way, at most two sections can be oiled, and only the ends can be oiled. The steel strand moves back and forth in the oil injection pipe twice, making it difficult to control the oil injection volume, prone to waste, and the steel strand needs to be able to move forward and backward, which not only makes the equipment more complex but also increases the labor intensity of workers and reduces the production efficiency. Content of the Utility Model

[0003] The purpose of the utility model is to provide a sizing and segmenting non-bonded steel strand opening and closing type oil injection device. The oil injection pipe can be opened and closed, facilitating the entry and exit of the wire, and meeting the production requirements of interval segmented oil injection for steel strands. A silica gel gasket is arranged on the fastening surface of the upper pipe body and the lower pipe body. After the oil injection pipe is filled with grease, a high-pressure chamber is formed in the oil injection pipe, facilitating the injection of grease into the internal gaps of the steel strand. The driving cylinder is used to open and close up and down, which can not only prevent the grease from being extruded from the fastening surface during the working process but also prevent the opening and closing of the opening and closing type oil injection pipe from being blocked.

[0004] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0005] The utility model provides a sizing and segmenting non-bonded steel strand opening and closing type oil injection device, which includes an opening and closing type oil injection pipe, a bracket, an upper driving cylinder and a lower driving cylinder fixedly arranged on the bracket. The opening and closing type oil injection pipe includes an upper pipe body and a lower pipe body that can be fastened. The upper pipe body is fixedly connected to the telescopic rod of the upper driving cylinder, and the lower pipe body is fixedly connected to the telescopic rod of the lower driving cylinder. The width of the fastening contact surface between the upper pipe body and the lower pipe body is greater than the wall thicknesses of the upper pipe body and the lower pipe body, and a sealing gasket is arranged on the fastening contact surface.

[0006] Preferably, the upper pipe body includes a straight pipe body, with semi-conical heads connected to both ends of the straight pipe body. One of the semi-conical heads is connected to the inlet end, and the other semi-conical head is connected to the outlet end. A guide sleeve is provided inside the inlet end, and an oil control sleeve is provided inside the outlet end.

[0007] Preferably, the lower pipe body includes a straight pipe body, with semi-conical heads connected to both ends of the straight pipe body. One of the semi-conical heads is connected to the inlet end, and the other semi-conical head is connected to the outlet end. A guide sleeve is provided inside the inlet end, and an oil control sleeve is provided inside the outlet end.

[0008] Preferably, a set of positioning bolts and guide seats are provided on each of the two side columns of the bracket. The guide seats are arranged above the positioning bolts. A guide link is installed on the guide seat, and the guide link is fixedly connected to the upper pipe body. A positioning plate is provided on the outer wall of the lower pipe body close to the bracket.

[0009] Preferably, a baffle plate driving cylinder is fixedly connected to the middle part of the side surface of the upper pipe body. The telescopic rod of the baffle plate driving cylinder is fixedly connected to the baffle plate through a connecting rod. Chute grooves are provided at both ends of the upper pipe body, and both ends of the baffle plate are fitted and installed in the chute grooves.

[0010] Preferably, the chute groove includes vertical plates fixedly provided on the outer wall surfaces at both ends of the upper pipe body. Two horizontal plates are arranged in parallel on the vertical plates, and a baffle plate sliding channel is formed between the two horizontal plates.

[0011] Preferably, an upper connecting seat is provided on the outer wall of the upper pipe body and is connected in cooperation with an upper driving cylinder, and a lower connecting seat is provided on the outer wall of the lower pipe body and is connected in cooperation with a lower driving cylinder.

[0012] Preferably, two groups of oil inlet pipelines are provided on the lower pipe body, and valves are provided on the oil inlet pipelines.

[0013] Preferably, the valve includes a pneumatic valve and a manual valve connected in series.

[0014] Preferably, the two groups of oil inlet pipelines are arranged on both sides of the lower connecting seat.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1. The oil injection pipe can be opened and closed, facilitating the entry and exit of wires, and can meet the production requirements of interval segmented oil injection for steel strands.

[0017] 2. By using a guide seat, positioning bolts and a driving cylinder in cooperation, the upper pipe body and the lower pipe body can be stably and tightly closed. During the oil injection process for the steel strands, a sealed high-pressure cavity is formed inside the oil injection pipe, and the oil injection effect is good, and the grease will not leak out.

[0018] 3. A baffle plate is provided. When the oil injection pipe is opened, the baffle plate quickly moves below the upper pipe body to prevent the grease from falling onto the steel strands. Description of the Drawings

[0019] Figure 1 is a structural schematic diagram of the present utility model.

[0020] Figure 2 is Figure 1 a side view of

[0021] Figure 3 is a schematic diagram of the cooperative installation of the opening and closing type oil injection pipe and the oil baffle.

[0022] Figure 4 is a cooperative installation drawing of the chute and the upper pipe body.

[0023] Wherein: 1 - opening and closing type oil injection pipe; 11 - upper pipe body; 12 - lower pipe body; 13 - guide seat; 14 - straight pipe body; 15 - semi-conical head I; 16 - incoming line end; 17 - guide sleeve; 18 - outgoing line end; 19 - oil control sleeve; 20 - semi-conical head II; 21 - guide connecting rod; 2 - bracket; 3 - upper driving cylinder; 31 - upper connecting seat; 4 - lower driving cylinder; 41 - lower connecting seat; 5 - oil baffle; 6 - oil baffle driving cylinder; 61 - connecting rod; 7 - chute; 71 - vertical plate; 72 - upper horizontal plate; 73 - lower horizontal plate; 8 - positioning bolt; 81 - positioning plate; 9 - oil inlet pipeline; 91 - pneumatic valve; 92 - manual valve; 10 - gasket. Specific embodiments

[0024] The following further describes the present utility model in detail with reference to the drawings and embodiments.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0026] The present utility model provides a fixed-length segmented non-bonded steel strand opening and closing type oil injection device. Refer to Figures 1-4, including an opening and closing type oil injection pipe 1, a bracket 2, an upper driving cylinder 3 and a lower driving cylinder 4 fixedly arranged on the bracket 2. The opening and closing type oil injection pipe 1 includes an upper pipe body 11 and a lower pipe body 12 that can be buckled. An upper connecting seat 31 is arranged on the outer wall of the upper pipe body 11 and fixedly connected to the telescopic rod of the upper driving cylinder 3. A lower connecting seat 41 is arranged on the outer wall of the lower pipe body 12 and fixedly connected to the telescopic rod of the lower driving cylinder 4. The width of the buckling contact surface between the upper pipe body 11 and the lower pipe body 12 is greater than the wall thickness of the upper pipe body 11 and the lower pipe body 12. A sealing gasket 10 is arranged on the buckling contact surface of the upper pipe body 11 and / or the buckling contact surface of the lower pipe body 12. The sealing gasket can specifically be a silicone sealing gasket, and the setting method can specifically be an embedded installation. When sealing gaskets are arranged on both the buckling contact surfaces of the upper pipe body 11 and the lower pipe body 12, the two sealing gaskets can be installed at corresponding positions or can be installed in a staggered manner. After injecting grease, the sealing effect is good, a high-pressure sealed oil injection cavity is formed, and the oil injection effect is good. The use of the upper driving cylinder 3 and the lower driving cylinder 4 can prevent the upper pipe body 11 and the lower pipe body 12 from shaking during high-pressure oil injection, affecting the sealing effect of the oil injection pipe and preventing the grease from spraying out from the gap of the buckling contact surface.

[0027] Further, the upper pipe body 11 includes a straight pipe body 14. The two ends of the straight pipe body 14 are respectively connected to a semi-conical head I 15 and a semi-conical head II 20. The other end of the semi-conical head I 15 is connected to an inlet end head 16, and the other end of the semi-conical head II 20 is connected to an outlet end head 18. A guide sleeve 17 is arranged inside the inlet end head 16, and an oil control sleeve 19 is arranged inside the outlet end head 18.

[0028] The lower pipe body 12 includes a straight pipe body 14. The two ends of the straight pipe body 14 are respectively connected to a semi-conical head I 15 and a semi-conical head II 20. The other end of the semi-conical head I 15 is connected to an inlet end head 16, and the other end of the semi-conical head II 20 is connected to an outlet end head 18. A guide sleeve 17 is arranged inside the inlet end head 16, and an oil control sleeve 19 is arranged inside the outlet end head 18.

[0029] When the upper pipe body 11 and the lower pipe body 12 are buckled, their respective semi-conical heads I 15 are buckled together to form a conical head, their respective straight pipe bodies 14 are buckled together to form a straight pipe, their respective semi-conical heads II 20 are buckled together to form a conical head, their respective inlet end heads 16 are buckled together, their respective guide sleeves 17 are buckled together, their respective outlet end heads 18 are buckled together, and their respective oil control sleeves 19 cooperate with each other, thereby forming an opening and closing type oil injection pipe with an oil injection cavity inside.

[0030] Furthermore, a set of positioning bolts 8 and guide seats 13 are provided on each of the two side columns of the bracket 2. The guide seat 13 is arranged above the positioning bolt 8. The guide seat 13 is installed with a guide link 21, and the guide link 21 is fixedly connected to the upper pipe body 11 to ensure stable up and down movement of the upper pipe body 11. A positioning plate 81 is provided on the outer wall of the lower pipe body 12 close to one side of the bracket 2. When the lower pipe body 12 moves upward, when the positioning plate 81 touches the lower end face of the positioning bolt 8, the lower driving cylinder stops driving, indicating that the lower pipe body 12 has moved in place, and this position is the working position where the opening and closing type oil injection pipe 1 completes the oil injection of the steel strand.

[0031] Furthermore, a baffle driving cylinder 6 is fixedly connected to the middle part of the side surface of the upper pipe body 11. The telescopic rod of the baffle driving cylinder 6 is fixedly connected to the baffle 5 through a connecting rod 61. Sliding grooves 7 are provided at both ends of the upper pipe body 11. Both ends of the baffle 5 are fitted and installed in the sliding grooves 7. The sliding groove 7 includes vertical plates 71 fixedly arranged on the outer wall surfaces at both ends of the upper pipe body 11. An upper horizontal plate 72 and a lower horizontal plate 73 are arranged in parallel on the vertical plates 71. A baffle sliding channel is formed between the upper horizontal plate 72 and the lower horizontal plate 73. When the opening and closing type oil injection pipe is opened, the telescopic rod of the baffle driving cylinder 6 contracts, and the connecting rod 61 drives the baffle to move below the upper pipe body 11 to block the falling grease and prevent pollution of the steel strand. When the opening and closing type oil injection pipe is buckled, the telescopic rod of the baffle driving cylinder 6 extends, and the connecting rod 61 drives the baffle to move to the lower side of the upper pipe body 11, without hindering the buckling of the upper pipe body 11 and the lower pipe body 12.

[0032] Furthermore, two groups of oil inlet pipelines 9 are provided on the lower pipe body 12. The two groups of oil inlet pipelines 9 are arranged on both sides of the lower connecting seat 41, which can avoid the influence on the use of the entire oil injection device due to the failure of one group of oil inlet pipelines. During use, either one of the oil inlet pipelines 9 can be selected for oil inlet, or the two groups of oil inlet pipelines 9 can be used for oil inlet simultaneously. A valve is provided on the oil inlet pipeline 9. The valve includes a pneumatic valve 91 and a manual valve 92 connected in series to achieve two control modes of automatic and manual.

[0033] Working principle: First, the telescopic rods of the upper drive cylinder 3 and the lower drive cylinder 4 are in a contracted state, the upper pipe body 11 and the lower pipe body 12 are separated, and the telescopic rod of the oil baffle drive cylinder 6 is in an extended state, and the oil baffle stops below the upper pipe body 11 side. After the steel strand enters the wire to a predetermined position, the lower drive cylinder 4 is started first. The telescopic rod of the lower drive cylinder 4 extends upward, driving the lower pipe body 12 to move upward. When the positioning plate 81 touches the lower end face of the positioning bolt 8, the lower drive cylinder 4 stops driving, indicating that the lower pipe body 12 has moved in place. This position is the working position where the opening and closing type oil injection pipe 1 completes the oil injection of the steel strand. At this time, the upper drive cylinder 3 is started. The telescopic rod of the upper drive cylinder 3 extends downward, driving the upper pipe body 11 to move downward, and buckles with the lower pipe body 12 at a predetermined position. The steel strand axially penetrates the opening and closing type oil injection pipe along the oil injection pipe. The valve is opened, and the oil inlet pipeline 9 injects grease into the opening and closing type oil injection pipe 1. After the grease is filled, a high-pressure sealed oil injection cavity is formed in the oil injection pipe. The steel strand is oiled during the movement from the wire inlet end 16 to the wire outlet end 18. The high pressure in the oil injection cavity enables the grease to be fully injected into the internal gaps of the steel strand. A grease control sleeve 19 is arranged in the wire outlet end 18, which can scrape off the excess grease on the steel strand. After the oil injection of a certain length of the steel strand is completed, the steel strand does not need to be oiled at intervals of a certain length. At this time, first close the valve on the oil inlet pipeline 9, and then start the upper drive cylinder 3, the lower drive cylinder 4, and the oil baffle drive cylinder 6. The telescopic rod of the upper drive cylinder 3 retracts, driving the upper pipe body 11 to move upward. At the same time, the telescopic rod of the oil baffle drive cylinder 6 retracts, and the connecting rod 61 drives the oil baffle to move below the upper pipe body 11 to block the grease falling from the inner wall of the upper pipe body 11. The telescopic rod of the lower drive cylinder 4 retracts, driving the lower pipe body 12 to move downward. The steel strand moves forward a predetermined length, which is the designed non-oiled length at intervals, and then continues to oil the subsequent section of the steel strand. The lower drive cylinder 4 is started first. The telescopic rod of the lower drive cylinder 4 extends upward, driving the lower pipe body 12 to move upward. When the positioning plate 81 touches the lower end face of the positioning bolt 8, the lower drive cylinder stops driving, indicating that the lower pipe body 12 has moved in place. This position is the working position where the opening and closing type oil injection pipe 1 completes the oil injection of the steel strand. At this time, the upper drive cylinder 3 is started. The telescopic rod of the upper drive cylinder 3 extends downward, driving the upper pipe body 11 to move downward. The oil baffle drive cylinder 6 is started. The telescopic rod of the oil baffle drive cylinder 6 extends, and the connecting rod 61 drives the oil baffle to translate and move to the lower side of the upper pipe body 11. The upper pipe body 11 moves to a predetermined position and buckles with the lower pipe body 12. The steel strand axially penetrates the oil injection pipe along the oil injection pipe. The valve is opened, and the oil inlet pipeline 9 injects grease into the opening and closing type oil injection pipe 1. The oil injection of the steel strand continues to be completed during the movement from the wire inlet end 16 to the wire outlet end 18. The above steps can be repeated according to the number of oil injection sections at intervals.

[0034] It should be noted that the shutdown timing of the valve on the oil inlet pipeline 9 can be set according to the linear velocity of the steel strand movement and the length of the oil injection section. When the incoming line length is slightly shorter than the designed oil injection length, the valve can be shut down first to avoid excessive grease in the pipe when the oil injection pipe is opened, which is likely to fall off, difficult to clean, and prone to waste.

[0035] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various modifications and variations can be made to the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fixed-length segmented unbonded steel strand opening and closing oiling device, characterized in that: It includes an openable and closable oil filling pipe, a bracket, an upper driving cylinder and a lower driving cylinder fixedly arranged on the bracket. The openable and closable oil filling pipe includes an upper tube body and a lower tube body that can be buckled. The upper tube body is fixedly connected to the telescopic rod of the upper driving cylinder, and the lower tube body is fixedly connected to the telescopic rod of the lower driving cylinder. The width of the buckling contact surface of the upper tube body and the lower tube body is greater than the wall thickness of the upper tube body and the lower tube body, and a sealing gasket is arranged on the buckling contact surface.

2. The opening and closing oiling device for fixed-length segmented unbonded steel strands according to claim 1 is characterized by: The upper tube body comprises a straight tube body, the two ends of which are connected to semi-conical heads, one of which is connected to the incoming line end, and the other is connected to the outgoing line end, a guide sleeve is arranged in the incoming line end, and an oil control sleeve is arranged in the outgoing line end.

3. The opening and closing oiling device for fixed-length segmented unbonded steel strands according to claim 1 is characterized by: The lower tube body comprises a straight tube body, the two ends of which are connected to semi-conical heads, one of which is connected to the incoming line end, and the other is connected to the outgoing line end, a guide sleeve is arranged in the incoming line end, and an oil control sleeve is arranged in the outgoing line end.

4. The opening and closing oiling device for fixed-length segmented unbonded steel strands according to claim 1 is characterized in that: A group of positioning bolts and guide seats are respectively arranged on the columns on both sides of the bracket. The guide seats are arranged above the positioning bolts. The guide seats are equipped with guide connecting rods. The guide connecting rods are fixedly connected to the upper tube body. A positioning plate is arranged on the outer wall of the lower tube body close to the bracket.

5. The opening and closing oiling device for fixed-length segmented unbonded steel strands according to claim 1 is characterized by: An oil baffle driving cylinder is fixedly connected to the middle part of the side of the upper tube body, and the telescopic rod of the oil baffle driving cylinder is fixedly connected to the oil baffle through a connecting rod. Slide grooves are arranged at both ends of the upper tube body, and both ends of the oil baffle plate are cooperated and installed in the slide grooves.

6. The opening and closing oiling device for fixed-length segmented unbonded steel strands according to claim 5 is characterized in that: The slide groove comprises vertical plates fixedly arranged on the outer wall surfaces at both ends of the upper tube body, two horizontal plates are arranged in parallel on the vertical plates, and an oil baffle plate sliding channel is formed between the two horizontal plates.

7. The opening and closing type oil injection device for fixed-length segmented unbonded steel strands according to claim 1 is characterized in that: The outer wall of the upper tube body is provided with an upper connecting seat which is matched and connected with the upper driving cylinder, and the outer wall of the lower tube body is provided with a lower connecting seat which is matched and connected with the lower driving cylinder.

8. The opening and closing type oil injection device for fixed-length segmented unbonded steel strands according to claim 1 is characterized by: The lower tube body is provided with two groups of oil inlet pipelines, and valves are provided on the oil inlet pipelines.

9. The opening and closing type oil injection device for fixed-length segmented unbonded steel strands according to claim 8 is characterized in that: The valve comprises a pneumatic valve and a manual valve connected in series.

10. The opening and closing type oil injection device for fixed-length segmented unbonded steel strands according to claim 7 or 8, characterized in that: Two groups of oil inlet pipelines are arranged on both sides of the lower connecting seat.

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