Opening expanding device

Abstract

The utility model provides an opening expanding device. The opening expanding device comprises a driving mechanism (1) and an opening expanding mechanism (2). Wherein the opening expanding mechanism (2) is of an umbrella-shaped structure and is opened or closed under the pushing or pulling of the driving mechanism (1); an umbrella framework of the umbrella-shaped mechanism of the driving mechanism (1) comprises a plurality of cylindrical supporting rods (204); when the opening expanding mechanism (2) is opened and closed, the length directions of the supporting rods (204) are parallel. The device has the advantages that the operation mode is simpler, more convenient and safer, the whole plugging process can be completed through single-person operation, and the labor intensity and the safety risk are reduced; the operation process is simplified, the operation time is shortened, and the repair efficiency is improved; by optimizing the structure and the operation mode of the device, material loss caused by factors such as well depth is reduced, and the construction cost is reduced; and the high-quality plugging effect can be achieved, and the overall quality of a drainage pipeline repairing project can be improved.

Description

Technical Field

[0001] The present application belongs to the field of drainage infrastructure maintenance, and specifically relates to an expansion device. Background Art

[0002] With the continuous development of urban construction, the maintenance and repair of infrastructure such as drainage pipes are becoming increasingly important. In the field of municipal engineering construction, projects such as new roads, road reconstruction and expansion, and treatment of black and odorous water bodies all involve the construction of sewage and rainwater drainage pipes. During the repair process of drainage pipes, it is often necessary to plug the drainage pipes. The existing construction process generally uses thermoplastic molding to perform plugging operations. During the operation, the lining pipe is first dragged into the interior of the pipe to be repaired, and then the pipe mouth is heated by hot steam to soften the pipe mouth. Next, the pipe mouth is opened with a tool, and an air bag is placed to achieve plugging. After cooling and shaping in the well, the plugging operation can be completed. The traditional plugging process often requires several people to work together to open the heated pipe mouth, which has problems such as complex operation, low efficiency, and high cost. Utility Model Content

[0003] The purpose of this application is to overcome the defects of the existing expansion operation being complicated and inefficient.

[0004] In order to achieve the above-mentioned purpose, the present application proposes an expansion device, which comprises: a driving mechanism 1 and an expansion mechanism 2; wherein,

[0005] The expansion mechanism 2 is an umbrella-shaped structure, which opens or closes when pushed or pulled by the driving mechanism 1;

[0006] The umbrella frame of the umbrella-shaped mechanism of the driving mechanism 1 includes a plurality of pairs of main arms 202 and auxiliary arms 214 of columnar structure; each pair of main arms 202 and auxiliary arms 214 are located in the same plane passing through the axis of the umbrella handle and are always parallel to each other; the distance between the ends of each pair of main arms 202 and auxiliary arms 214 on the same side is equal; and the angles between the planes where each two pairs of main arms 202 and auxiliary arms 214 are located are equal;

[0007] The umbrella frame also includes a plurality of rod bases 203; the two pairs of ends of each pair of main arms 202 and auxiliary arms 214 on the same side are pin-connected to the umbrella handle and the rod base 203 respectively;

[0008] The expansion mechanism 2 further includes a plurality of cylindrical support rods 204; one end of each support rod 204 is fixedly connected to a rod seat 203;

[0009] When the expansion mechanism 2 is closed, each group of support rods 204, the rod seat 203 and the main arm 202 are collinear in the length direction; when the expansion mechanism 2 is opened and closed, the length directions of the support rods 204 are parallel.

[0010] As an improvement of the above device, the driving mechanism 1 includes:

[0011] A hand wheel 101 of a disc-shaped structure;

[0012] The screw 102 is a cylindrical screw with external threads, one end of which is fixed to the center of the handwheel 101;

[0013] The push plate 105 has a disc-shaped structure, and a first through hole with a thread is provided in the center; the first through hole is threadedly connected to the end of the screw 102 away from the hand wheel 101; a plurality of second through holes are provided around the first through hole;

[0014] The disc-shaped retainer 103 is located between the hand wheel 101 and the push plate 105, and has a third through hole at its center; the screw 102 passes through the third through hole;

[0015] A plurality of columnar slide rods 104, one end of which is fixedly connected to the retaining frame 103 around the third through hole, and the other end of which is fixedly connected to the expansion mechanism 2; each slide rod 104 passes through a second through hole of the push plate 105;

[0016] Four first push rods 106 of columnar structure are located on the side of the push plate 105 away from the hand wheel 101; one end of each first push rod 106 is fixedly connected to the push plate 105 around the first through hole; and

[0017] The four columnar second push rods 107 have one end connected to the end of the first push rod 106 away from the push plate 105 by a pin, and the other end connected to the expansion mechanism 2 by a pin.

[0018] As an improvement of the above device, the expansion mechanism 2 includes:

[0019] The fixing frame 201 is a hollow cylindrical structure with one end closed; the end face of the open side of the fixing frame 201 is fixedly connected to the end of the plurality of slide bars 104 away from the retaining frame 103; the side face of the fixing frame 201 has a through elongated slot 205 every 90 degrees, and a first pin hole 207 for accommodating a pin shaft is opened in the middle of the elongated slot 205; all the first pin holes 207 are located in the same plane perpendicular to the axis of the columnar structure of the fixing frame 201; a support 206 extends outward from the middle of the closed end face of one side of the fixing frame 201; the support 206 has four first pin seats 208, each first pin seat 208 is located on the extension line of the length direction of an elongated slot 205; each first pin seat 208 has two second pin holes 209 for accommodating a pin shaft; all the second pin holes 209 are located in the same plane perpendicular to the axis of the columnar structure of the fixing frame 201;

[0020] The four main arms 202 are each L-shaped with an obtuse angle between the short side and the long side. A fourth pin hole 211 is provided on the end of the long side of the L-shaped structure of the main arm 202, away from the short side. The main arm 202 is pin-connected to the rod base 203 via the fourth pin hole 211. A third pin hole 210 is provided at the intersection of the long side and the short side of the L-shaped structure of the main arm 202. A second pin base 212 is provided on the end of the short side of the main arm 202, away from the long side.

[0021] Four auxiliary arms 214, all of which are columnar structures; one end of each auxiliary arm 214 is pin-connected to a support 206 of the fixing frame 201, and the pin shaft is accommodated in the second pin hole 209;

[0022] The short side of the L-shaped structure of the main arm 202 passes through the long strip slot 205 of the fixing frame 201 and extends into the interior of the fixing frame 201; the third pin hole 210 and the first pin hole 207 accommodate the pin shaft to connect the main arm 202 to the fixing frame 201; the second pin seat 212 of the main arm 202 is pin-connected to the end of the second push rod 107 away from the first push rod 106;

[0023] The four rod bases 203 are all L-shaped structures; the end of the long side of the L-shaped structure of the rod base 203 away from the short side has a pin hole, which is used to pin-connect with the end of the main arm 202 away from the fixed frame 201; the end of the short side of the L-shaped structure of the rod base 203 away from the long side also has a pin hole, which is used to pin-connect with the end of the auxiliary arm 214 away from the fixed frame 201; and

[0024] There are four columnar support rods 204, each of which is fixedly connected to a rod base 203 at the intersection of the long side and the short side of the L-shaped structure of the rod base 203; the axis direction of each support rod 204 is collinear with the direction of the long side of the L-shaped structure of the connected rod base 203.

[0025] As an improvement to the above device, the distance between the first pin hole 207 and the second pin hole 209 is equal to the distance between the two pin holes on the rod seat 203 .

[0026] Compared with the prior art, the advantages of this application are:

[0027] 1. The operation mode of the utility model is simpler and safer. The entire plugging process can be completed by one person, which reduces labor intensity and safety risks.

[0028] 2. The expansion device of the utility model simplifies the operation process, shortens the operation time and improves the repair efficiency;

[0029] 3. By optimizing the device structure and operation mode, the material loss caused by factors such as well depth is reduced, and the construction cost is reduced;

[0030] 4. The expansion device of this utility model can achieve high-quality plugging effect, which helps to improve the overall quality of drainage pipe repair projects;

[0031] 5. The application of thermoplastic molding makes the plugging effect more reliable and lasting. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The figure shows the structure of the expansion device;

[0033] Figure 2 The structure of the drive mechanism is shown Figure 1 ;

[0034] Figure 3 The structure of the drive mechanism is shown Figure 2 ;

[0035] Figure 4 The diagram shows the structure of the cage, slide rod and push plate;

[0036] Figure 5 The figure shows the structure of the driving mechanism without the retaining frame and the sliding rod;

[0037] Figure 6 Shown is the connection structure between the fixed frame and the slide rod Figure 1 ;

[0038] Figure 7 Shown is the connection structure between the fixed frame and the slide rod Figure 2 ;

[0039] Figure 8 Shown are the three-dimensional view and three-view drawing of the main arm;

[0040] Figure 9 Shown is a cross-sectional view of the connection structure between the main arm, the fixed frame, and the second push rod;

[0041] Figure 10 The figure shows the connection structure diagram of the auxiliary arm and the fixed frame;

[0042] Figure 11 The figure shows the connection structure of the fixed frame, main arm, auxiliary arm and pole base (only one main arm, one auxiliary arm and one pole base are shown);

[0043] Figure 12 The figure shows the connection structure of the fixed frame, main boom, auxiliary boom, pole base and support rod (only one main boom, one auxiliary boom, one pole base and one support rod are shown);

[0044] Figure 13 The figure shows a cross-sectional view of the expansion device in the closed state (the retainer and slide rod are omitted);

[0045] Figure 14 The figure shows the effect of the expansion device in the open state;

[0046] Figure 15 The figure shows the effect of the expansion device being closed and inserted into the thermoplastic tube;

[0047] Figure 16 The figure shows the positions of the four support rods placed in the thermoplastic tube when the expansion device is closed;

[0048] Figure 17 The figure shows the effect after the expansion device is placed in the thermoplastic tube and opened.

[0049] Figure ID

[0050] 1. Driving mechanism

[0051] 101. Handwheel 102. Screw

[0052] 103, retainer 104, slide bar

[0053] 105, push plate 106, first push rod

[0054] 107. Second Putt

[0055] 2. Expansion mechanism

[0056] 201, fixed frame 202, main arm

[0057] 203, pole seat 204, support pole

[0058] 205, long strip groove 206, support

[0059] 207, first pin hole 208, first pin seat

[0060] 209, second pin hole 210, third pin hole

[0061] 211, fourth pin hole 212, second pin seat

[0062] 213, fifth pin hole 214, auxiliary arm DETAILED DESCRIPTION

[0063] The technical solution of this application is described in detail below with reference to the accompanying drawings.

[0064] The expansion device provided in this application is used to expand the opening of a thermoplastic tube to facilitate insertion of an airbag. Figure 1 As shown, the expansion device includes a driving mechanism 1 and an expansion mechanism 2.

[0065] like Figure 2-Figure 5 As shown, the driving mechanism 1 includes:

[0066] The hand wheel 101 is a disc structure, which is convenient for the operator to rotate. The hand wheel 101 can also be replaced with a handle in a shape of a straight line, a cross, etc., which is convenient for the operator to rotate.

[0067] The screw rod 102 is a cylindrical screw rod with an external thread, one end of which is fixed to the center of the hand wheel 101 and the other end is threadedly connected to the push plate 105. When the hand wheel 101 rotates, the screw rod 102 is driven to rotate together.

[0068] Push plate 105 is a disc-shaped structure with a threaded first through-hole at its center, which is threadedly connected to one end of screw rod 102. When handwheel 101 rotates, it drives screw rod 102 with it, allowing push plate 105 to move forward and backward along the axis of screw rod 102. Several second through-holes are provided around the first through-hole of push plate 105.

[0069] The retaining frame 103 is a disc-shaped structure with a third through hole in the center for accommodating the screw rod 102 to pass through.

[0070] Several columnar slide bars 104: one end is fixedly connected to the holder 103 around the third through hole, and the other end is fixedly connected to the fixing frame 201 of the expansion mechanism 2 (see Figure 6 The middle portion of each slide bar 104 passes through a second through hole of the push plate 105. When the push plate 105 moves back and forth along the screw rod 102 under the drive of the hand wheel 101, the slide bars 104 can prevent the push plate 105 from rotating.

[0071] Four first push rods 106 are columnar structures. One end is fixedly connected to the push plate 105 around the first through hole, and the other end is pinned to one end of the second push rod 107. When the push plate 105 moves back and forth along the screw 102, the first push rods 106 also move back and forth along the screw 102. The four first push rods 106 are of equal size.

[0072] The second push rod 107 of the four columnar structures is connected to the first push rod 106 at one end and to the second pin seat 212 of the main arm 202 at the other end (see Figure 9 ). The four second push rods 107 have equal sizes.

[0073] like Figure 1 、 Figure 6-Figure 12 As shown, the expansion mechanism 2 includes:

[0074] Fixed frame 201, such as Figure 6As shown, it is a hollow cylindrical structure with one end closed. The open end surface of the fixed frame 201 is fixedly connected to a plurality of slide bars 104. The side of the fixed frame 201 has a through-long slot 205 every 90 degrees. A first pin hole 207 for accommodating a pin is defined in the center of the slot 205. All first pin holes 207 are located in the same plane, perpendicular to the axis of the fixed frame 201's columnar structure. The fixed frame 201 is pin-connected to the main arm 202 through the first pin holes 207. A support 206 extends outward from the center of the closed end surface of the fixed frame 201. The support 206 has four first pin seats 208, each located along the length of an extended slot 205. Each first pin seat 208 has two second pin holes 209 for accommodating a pin. All second pin holes 209 are located in the same plane, perpendicular to the axis of the fixed frame 201's columnar structure. Each first pin seat 208 is connected to a secondary arm 214 through the second pin hole 209 (see Figure 10 ).

[0075] 4 main arms 202, such as Figure 7 As shown, the main arm 202 is an L-shaped structure with an obtuse angle between the short side and the long side. The long side of the L-shaped structure of the main arm 202 has a fourth pin hole 211 at one end away from the short side. The main arm 202 is pin-connected to the rod base 203 through the fourth pin hole 211 (see Figure 11 The main arm 202 has a third pin hole 210 at the intersection of the long side and the short side of the L-shaped structure. The short side of the main arm 202 has a second pin seat 212 at one end away from the long side. The second pin seat 212 has a fifth pin hole 213 for accommodating the pin shaft. Figure 9 As shown, during installation, the short side of the L-shaped structure of the main arm 202 passes through the elongated slot 205 of the fixing frame 201 and extends into the interior of the fixing frame 201. The third pin hole 210 and the first pin hole 207 accommodate the pin shaft, thereby pin-connecting the main arm 202 to the fixing frame 201. The second pin seat 212 of the main arm 202 is pin-connected to one end of the second push rod 107. The four main arms 202 are of equal size.

[0076] 4 auxiliary arms 214, such as Figure 10 As shown, the auxiliary arm 214 is a columnar structure. One end of the auxiliary arm 214 is pin-connected to a support 206 of the fixed frame 201, and the other end is pin-connected to the rod base 203. The four auxiliary arms 214 have equal sizes.

[0077] 4 rod holders 203, such as Figure 11 As shown, rod base 203 is an L-shaped structure. The end of the long side of the L-shaped structure of rod base 203, away from the short side, has a pin hole, which is used to connect to one end of the main arm 202. The end of the short side of the L-shaped structure of rod base 203, away from the long side, also has a pin hole, which is used to connect to one end of the auxiliary arm 214. The four rod bases 203 are of equal size.

[0078] The distance A between the first pin hole 207 and the second pin hole 209 is equal to the distance B between the two pin holes on the rod seat 203. Since the distance A is equal to the distance B, the main arm 202 and the auxiliary arm 214 always maintain a parallel posture when rotating.

[0079] 4 columnar struts 204, such as Figure 12 As shown, one end of the support rod is fixedly connected to the rod base 203 at the intersection of the long side and the short side of the L-shaped structure of the rod base 203 along the direction of the long side of the L-shaped structure of the rod base 203.

[0080] like Figure 13 The figure shows the state of the expansion device when it is closed. When in use, the hand wheel 101 is turned to drive the screw 102 to rotate at the same time, so that the driving push plate 105 moves toward the fixed frame 201. The push plate 105 pushes the first push rod 106 to move toward the fixed frame 201, and the first push rod 106 pushes the second push rod 107 to move inside the fixed frame 201, so that the main arm 202 rotates clockwise around the pin connection between the main arm 202 and the fixed frame 201, and the long side of the L-shaped structure of the main arm 202 is tilted away from the fixed frame 201. The main arm 201 drives the rod seat 203 and the auxiliary arm 214 to rotate together, and tilts away from the fixed frame 201. Since the relative positions of the main arm 201 and the auxiliary arm 214 remain unchanged, the posture of the rod seat 214 can be guaranteed to remain unchanged during tilting, and the four support rods 204 can always maintain a parallel posture. After the push plate 105 moves to the limit, the expansion device is transformed into an open state, as shown in FIG. Figure 14 shown.

[0081] like Figure 15-17 As shown, when the expansion device is used for construction, in the closed state, the four support rods 204 of the expansion device are extended into the thermoplastic tube, and the hand wheel 101 is turned to change the expansion device into the open state to expand the thermoplastic tube.

[0082] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of this application and are not intended to limit the scope of the present invention. Although this application has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions to the technical solutions of this application do not depart from the spirit and scope of the technical solutions of this application and should be encompassed by the claims of this application.

Claims

1. An expansion device, characterized in that: The device comprises: a driving mechanism (1) and an expansion mechanism (2); wherein, The expansion mechanism (2) is an umbrella-shaped structure, which opens or closes when pushed or pulled by the driving mechanism (1); The umbrella frame of the umbrella-shaped mechanism of the driving mechanism (1) comprises a plurality of pairs of main arms (202) and auxiliary arms (214) of columnar structures; each pair of main arms (202) and auxiliary arms (214) are located in the same plane passing through the umbrella handle axis and are always parallel; the distance between the ends of each pair of main arms (202) and auxiliary arms (214) on the same side is equal; and the angles between the planes where each two pairs of main arms (202) and auxiliary arms (214) are located are equal; The umbrella frame further comprises a plurality of rod seats (203); two pairs of ends of each pair of main arms (202) and auxiliary arms (214) located on the same side are respectively connected to the umbrella handle and the rod seat (203) by pins; The expansion mechanism (2) further comprises a plurality of columnar support rods (204); one end of each support rod (204) is fixedly connected to a rod seat (203); When the expansion mechanism (2) is closed, each group of support rods (204), the rod seat (203) and the main arm (202) are collinear in the length direction; when the expansion mechanism (2) is opened and closed, the length directions of the support rods (204) are parallel.

2. The expansion device according to claim 1, characterized in that The driving mechanism (1) comprises: A hand wheel (101) with a disc-shaped structure; The screw (102) is a cylindrical screw with external threads, one end of which is fixed to the center of the hand wheel (101); A push plate (105) of a disc-shaped structure is provided with a first through hole with a thread at the center; the first through hole is threadedly connected to an end of a screw rod (102) away from the hand wheel (101); a plurality of second through holes are provided around the first through hole; A disc-shaped retaining frame (103) is located between the hand wheel (101) and the push plate (105), and has a third through hole at its center; the screw (102) passes through the third through hole; A plurality of columnar sliding rods (104) are fixedly connected to the retaining frame (103) around the third through hole at one end and fixedly connected to the expansion mechanism (2) at the other end; each sliding rod (104) passes through a second through hole of the push plate (105); Four first push rods (106) of columnar structure are located on a side of the push plate (105) away from the hand wheel (101); one end of each first push rod (106) is fixedly connected to the push plate (105) around the first through hole; and The second push rods (107) of the four columnar structures have one end connected to an end of the first push rod (106) away from the push plate (105) by a pin, and the other end connected to the expansion mechanism (2) by a pin.

3. The expansion device according to claim 2, characterized in that: The expansion mechanism (2) comprises: The fixing frame (201) is a hollow columnar structure with one end closed; the end surface of the opening side of the fixing frame (201) is fixedly connected to the end of the plurality of slide bars (104) away from the retaining frame (103); the side surface of the fixing frame (201) has a through long strip groove (205) every 90 degrees, and a first pin hole (207) for accommodating a pin shaft is opened in the middle of the long strip groove (205); all the first pin holes (207) are located on the same axis perpendicular to the axis of the columnar structure of the fixing frame (201) On a plane; a support (206) extends outward from the middle of a closed end surface of one side of the fixing frame (201); the support (206) has four first pin seats (208), each first pin seat (208) is located on an extension line of the length direction of an elongated slot (205); each first pin seat (208) has two second pin holes (209) for accommodating a pin shaft; all the second pin holes (209) are located on the same plane perpendicular to the axis of the columnar structure of the fixing frame (201); The four main arms (202) are all L-shaped structures with an obtuse angle between the short side and the long side; a fourth pin hole (211) is provided on the end of the long side of the L-shaped structure of the main arm (202) away from the short side; the main arm (202) is pin-connected to the rod seat (203) through the fourth pin hole (211); a third pin hole (210) is provided at the intersection of the long side and the short side of the L-shaped structure of the main arm (202); a second pin seat (212) is provided on the end of the short side of the main arm (202) away from the long side; Four auxiliary arms (214), all of which are columnar structures; one end of each auxiliary arm (214) is connected to a support (206) of the fixed frame (201) by a pin, and the pin shaft is accommodated in the second pin hole (209); The short side of the L-shaped structure of the main arm (202) passes through the long strip groove (205) of the fixing frame (201) and extends into the interior of the fixing frame (201); the third pin hole (210) and the first pin hole (207) accommodate the pin shaft so that the main arm (202) and the fixing frame (201) are pin-connected; the second pin seat (212) of the main arm (202) is pin-connected to an end of the second push rod (107) away from the first push rod (106); The four rod seats (203) are all L-shaped structures; the end of the long side of the L-shaped structure of the rod seat (203) away from the short side has a pin hole, and the pin hole is used to connect with the end of the main arm (202) away from the fixed frame (201); the end of the short side of the L-shaped structure of the rod seat (203) away from the long side also has a pin hole, and the pin hole is used to connect with the end of the auxiliary arm (214) away from the fixed frame (201); and Four columnar support rods (204), each support rod being fixedly connected to a rod base (203) at the intersection of the long side and the short side of the L-shaped structure of the rod base (203); the axis direction of each support rod (204) is collinear with the direction of the long side of the L-shaped structure of the connected rod base (203).

4. The expansion device according to claim 3, characterized in that: The distance between the first pin hole (207) and the second pin hole (209) is equal to the distance between the two pin holes on the rod seat (203).

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