Cement amount accurate control device for cast pipe lining

Abstract

The utility model discloses a cement amount accurate control device for a cast pipe lining, and belongs to the technical field of nodular cast iron pipes. The cement amount accurate control device for the cast pipe lining comprises a cast pipe body and further comprises supports, the number of the supports is at least two, the two supports are located below the two ends of the cast pipe body respectively, a positioning plate and a hydraulic cylinder are arranged below the supports, and bearing rods are arranged in the supports. In order to solve the problems that the use amount of lining cement is difficult to accurately control and cost control and control of the whole pipe body are not facilitated, after supports are lifted through a hydraulic cylinder, a cast pipe body is placed on the two supports, the position of the cast pipe body is fixed through two stabilizing rods, and then the hydraulic cylinder drives the supports to slowly descend; the vertical column presses the weighing sensor so as to obtain the weight of the cast pipe body before material distribution, at the moment, a worker injects cement mortar into the cast pipe body until the preset weight is reached, accurate control over the amount of cement used in a lining of the cast pipe body is achieved, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of ductile iron pipe technology, specifically to a device for precise control of cement quantity in the inner lining of cast iron pipes. Background Technology

[0002] Ductile iron pipes are pipes made by centrifugally casting molten iron of grade 18 or higher with the addition of spheroidizing agents using a centrifugal ductile iron casting machine at high speed. They are also known as ductile iron pipes or ductile cast pipes. They are mainly used for water supply and gas transmission in municipal and industrial enterprises, and are the preferred material for water supply pipes. They are also widely used in drainage fields, such as drainage pipe networks, urban rainwater treatment, and urban sewage treatment systems. During the finishing process of ductile iron pipes, cement mortar needs to be evenly coated on the inner wall. The industry standard for cement mortar has a thickness control standard. Too little thickness is not conducive to corrosion resistance, while too much thickness wastes costs.

[0003] During the centrifugal rotation process of ductile iron pipes of different diameters, a certain amount of cement mortar needs to be applied. However, in the current production process, the amount of cement mortar applied cannot be accurately known. The industry standard is to calculate the amount of cement mortar based on the thickness of the socket after the lining is completed. This makes it difficult to accurately control the amount of cement used in the lining, which is not conducive to cost control and overall pipe control. Therefore, this does not meet the current requirements, and a device for precise control of the amount of cement used in the lining of ductile iron pipes is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a device for precisely controlling the amount of cement used for the inner lining of cast pipes. After the support is lifted by a hydraulic cylinder, the cast pipe body is placed on two supports and fixed by two stabilizing rods. Then, the hydraulic cylinder drives the support to slowly descend, causing the column to press down on the weighing sensor, thereby obtaining the weight of the cast pipe body before the cement is applied. At this time, personnel inject cement mortar into the cast pipe body until the preset weight is reached, thus achieving precise control of the amount of cement used for the inner lining of the cast pipe body and solving the problems in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a precise control device for cement quantity in cast pipe lining, comprising a cast pipe body and a support, wherein at least two supports are provided, each located below both ends of the cast pipe body. A positioning plate and a hydraulic cylinder are provided below the support, a load-bearing rod is provided inside the support, a limit rod is provided at the upper end of the load-bearing rod, a base plate is provided at the lower end of the load-bearing rod, an extension plate is provided on the side of the load-bearing rod, a lead screw is provided above the base plate, a column is provided below the base plate, a weighing sensor is provided below the column, and a motor is provided on the side of the extension plate.

[0006] Preferably, a pad is provided below the cast pipe body, the pad is fixed to the middle of the limiting rod, and the pad is made of non-slip rubber material.

[0007] Preferably, a stabilizing rod is provided on both sides of the load-bearing rod, and the two stabilizing rods are respectively connected to the two ends of the limiting rod. The upper end of the stabilizing rod contacts the side of the cast pipe body, and an anti-slip rubber pad is provided on the contact surface between the stabilizing rod and the cast pipe body.

[0008] Preferably, the load-bearing rod has a driven wheel inside, which is mounted on the lead screw, and the extension plate has a driving wheel inside, which is connected to the motor shaft and the driving wheel is connected to the driven wheel by a belt.

[0009] Preferably, a fixing plate is provided below the positioning plate, a sleeve is provided inside the positioning plate, the upper end of the column is connected to the base plate, the lower end of the column passes through the sleeve and contacts the weighing sensor, and the hydraulic cylinder is installed on the fixing plate.

[0010] Preferably, one end of the lead screw is connected to a bearing at one end of the base plate, and the other end of the lead screw passes through the load-bearing rod and is connected to a bearing at the other end of the base plate. The lead screw is connected to the load-bearing rod bearing, and the side of the lead screw is provided with a left-hand threaded wall and a right-hand threaded wall.

[0011] Preferably, the lead screw is provided with two sliders on its exterior, one slider being connected to the left-hand threaded wall of the lead screw, and the other slider being connected to the right-hand threaded wall of the lead screw.

[0012] Preferably, a transmission block is provided on the top of the slider, and an elongated hole is provided inside the transmission block. A transmission shaft is provided inside the elongated hole, and the transmission shaft is connected to the lower end of the stabilizer rod.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model uses a hydraulic cylinder to lift the support frame, then places the cast pipe body on two supports. The cast pipe body is fixed by two stabilizing rods. Afterwards, the hydraulic cylinder drives the support frame to slowly descend, causing the column to move with the support frame and press down on the weighing sensor, thus obtaining the weight of the cast pipe body before the material is laid. At this time, the operator injects cement mortar into the cast pipe body until the preset weight is reached, achieving precise control of the amount of cement used for the inner lining of the cast pipe body. The weight of the cast pipe body before and after the material is laid is displayed on a screen. The operator can subtract the two numbers to obtain the weight of the injected cement, thus more intuitively controlling the amount of material laid, avoiding cement waste, and reducing production costs.

[0015] 2. This utility model uses a motor to drive the lead screw to rotate. The lead screw drives two sliders to move simultaneously. When the two sliders move towards the two ends of the lead screw at the same time, the upper ends of the two stabilizing rods move towards the casting pipe body at the same time. This makes the two stabilizing rods and one limiting rod form a triangular frame to fix the position of the casting pipe body, which improves the stability of subsequent weighing and material placement operations. Attached Figure Description

[0016] Figure 1 This is the overall front view of the present invention;

[0017] Figure 2 This is a partial structural diagram of the bracket of this utility model;

[0018] Figure 3 This is a partial structural diagram of the lead screw of this utility model;

[0019] Figure 4 This is a partial structural diagram of the slider of this utility model.

[0020] In the diagram: 1. Cast pipe body; 2. Support; 201. Load-bearing rod; 202. Limiting rod; 203. Pad; 204. Outer plate; 205. Base plate; 206. Column; 3. Lead screw; 301. Slider; 3011. Transmission block; 3012. Long slot; 302. Stabilizing rod; 3021. Transmission shaft; 4. Hydraulic cylinder; 5. Motor; 501. Drive wheel; 502. Driven wheel; 6. Weighing sensor; 7. Positioning plate; 701. Fixing plate; 702. Sleeve. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] To address the difficulty in accurately controlling the amount of cement used for the inner lining, which hinders cost control and overall pipe system management, please refer to [link to relevant documentation]. Figure 1-4 This utility model provides an embodiment of a device for precisely controlling the amount of cement used in the lining of cast pipes, comprising a cast pipe body 1 and a support 2. At least two supports 2 are provided, with each support 2 located below both ends of the cast pipe body 1. A positioning plate 7 and a hydraulic cylinder 4 are provided below the support 2. A load-bearing rod 201 is provided inside the support 2. A limit rod 202 is provided at the upper end of the load-bearing rod 201. A base plate 205 is provided at the lower end of the load-bearing rod 201. An extension plate 204 is provided on the side of the load-bearing rod 201. A lead screw 3 is provided above the base plate 205. A column 206 is provided below the base plate 205. A weighing sensor 6 is provided below the column 206. A motor 5 is provided on the side of the extension plate 204.

[0023] A pad 203 is provided below the cast pipe body 1. The pad 203 is fixed to the middle of the limit rod 202. The pad 203 is made of anti-slip rubber. Stabilizing rods 302 are provided on both sides of the load-bearing rod 201. The two stabilizing rods 302 are respectively connected to the two ends of the limit rod 202. The upper end of the stabilizing rod 302 contacts the side of the cast pipe body 1. The contact surface between the stabilizing rod 302 and the cast pipe body 1 is provided with anti-slip rubber pads. A fixing plate 701 is provided below the positioning plate 7. A sleeve 702 is provided inside the positioning plate 7. The upper end of the column 206 is connected to the base plate 205. The lower end of the column 206 passes through the sleeve 702 and contacts the weighing sensor 6. The hydraulic cylinder 4 is installed on the fixing plate 701.

[0024] After the hydraulic cylinder 4 lifts the support 2, the cast pipe body 1 is placed on the two supports 2. The cast pipe body 1 is fixed by two stabilizing rods 302. Then, the hydraulic cylinder 4 drives the support 2 to slowly descend until the upper end of the hydraulic cylinder 4 is completely separated from the base plate 205, so that the column 206 moves with the support 2 and presses down the weighing sensor 6, thereby obtaining the weight of the cast pipe body 1 before the material is laid. At this time, the personnel inject cement mortar into the cast pipe body 1 until the preset weight is reached, so as to achieve precise control of the amount of cement used for the inner lining of the cast pipe body 1. The weight of the cast pipe body 1 before and after the material is laid is displayed on the screen. The weight displayed on the screen is automatically zeroed before the cast pipe body 1 is weighed. The personnel can obtain the weight of the injected cement by subtracting the two numbers, so as to more intuitively control the amount of material laid, avoid cement waste, and further reduce production costs.

[0025] The load-bearing rod 201 has a driven wheel 502 inside, which is mounted on the lead screw 3. The extension plate 204 has a driving wheel 501 inside, which is connected to the motor shaft 5. The driving wheel 501 and the driven wheel 502 are connected by a belt. Both the driving wheel 501 and the driven wheel 502 have several grooves on their curved surfaces. Several transmission protrusions are provided on the contact surface between the belt and the driving wheel 501 and the driven wheel 502. The transmission protrusions are engaged inside the grooves and move with the belt, thereby driving the driving wheel 501 and the driven wheel 502 to rotate. One end of the lead screw 3 is connected to one end of the base plate 205 by a bearing. The other end of the lead screw 3 passes through the load-bearing rod 201 and is connected to the other end of the base plate 205 by a bearing. The lead screw 3 is connected to the load-bearing rod 201 by a bearing. The side of the lead screw 3 is provided with a left-hand threaded wall and a right-hand threaded wall. Two sliders 301 are provided on the outside of the lead screw 3. One slider 301 is connected to the left-hand threaded wall of the lead screw 3, and the other slider 301 is connected to the right-hand threaded wall of the lead screw 3. A transmission block 3011 is provided on the top of the slider 301. An elongated hole 3012 is provided inside the transmission block 3011. A transmission shaft 3021 is provided inside the elongated hole 3012. The transmission shaft 3021 is connected to the lower end of the stabilizer rod 302.

[0026] After the motor 5 drives the moving drive wheel 501, driven wheel 502 and lead screw 3 to rotate in sequence, the lead screw 3 then drives the two sliders 301 to move simultaneously. When the two sliders 301 move towards the two ends of the lead screw 3 at the same time, the upper ends of the two stabilizing rods 302 move towards the casting pipe body 1 at the same time, so that the two stabilizing rods 302 and the limiting rod 202 form a triangular frame to fix the position of the casting pipe body 1, which improves the stability of subsequent weighing and material placement operations, improves the accuracy of weighing results, and further improves the accuracy of cement dosage control.

[0027] Working principle: After the hydraulic cylinder 4 lifts the support 2, the cast pipe body 1 is placed on the two supports 2. The cast pipe body 1 is fixed by two stabilizing rods 302. Then, the hydraulic cylinder 4 drives the support 2 to slowly descend until the upper end of the hydraulic cylinder 4 is completely separated from the base plate 205, so that the column 206 moves with the support 2 and presses down the weighing sensor 6, thereby obtaining the weight of the cast pipe body 1 before the material is laid. At this time, the personnel inject cement mortar into the cast pipe body 1 until the preset weight is reached, so as to achieve precise control of the amount of cement used for the inner lining of the cast pipe body 1.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A device for precise control of cement quantity for a cast pipe liner, comprising a cast pipe body (1), characterized in that ； Also include the support (2), the support (2) is provided with at least two, two support (2) is located below the both ends of the casting pipe body (1) respectively, the lower portion of support (2) is provided with positioning plate (7) and hydraulic cylinder (4), the inside of support (2) is provided with bearing bar (201), the upper end of bearing bar (201) is provided with limit rod (202), the lower end of bearing bar (201) is provided with bottom plate (205), the side of bearing bar (201) is provided with extension plate (204), the upper portion of bottom plate (205) is provided with lead screw (3), the lower portion of bottom plate (205) is provided with stand (206), the lower portion of stand (206) is provided with load cell (6), the side of extension plate (204) is provided with motor (5).

2. The device for accurately controlling the amount of cement for a pipe inner liner according to claim 1, characterized in that: The lower portion of the casting pipe body (1) is provided with a cushion block (203), the cushion block (203) is fixed on the middle part above the limit rod (202), and the cushion block (203) is made of antiskid rubber material.

3. The device for accurately controlling the amount of cement for a pipe inner liner according to claim 1, characterized in that: The both sides of the bearing bar (201) are provided with stabilizing rods (302), the both ends of the two stabilizing rods (302) are connected with the shaft of the limit rod (202), the upper end of the stabilizing rod (302) is in contact with the side of the casting pipe body (1), and the contact surface between the stabilizing rod (302) and the casting pipe body (1) is provided with an antiskid rubber pad.

4. The device for accurately controlling the amount of cement for a pipe inner liner according to claim 1, characterized in that: The inside of the bearing bar (201) is provided with a driven wheel (502), the driven wheel (502) is installed on the lead screw (3), the inside of the extension plate (204) is provided with a driving wheel (501), the driving wheel (501) is connected with the shaft of the motor (5), and the driving wheel (501) is connected with the driven wheel (502) through a belt.

5. The device for precise control of cement quantity for pipe-in-pipe lining according to claim 1, characterized in that: The lower surface of the positioning plate (7) is provided with a fixed plate (701), the inside of the positioning plate (7) is provided with a sleeve (702), the upper end of the stand (206) is connected with the bottom plate (205), the lower end of the stand (206) penetrates through the sleeve (702) and is in contact with the load cell (6), and the hydraulic cylinder (4) is installed on the upper surface of the fixed plate (701).

6. The device for precise control of cement quantity for pipe-in-pipe lining according to claim 1, characterized in that: One end of the lead screw (3) is connected with one end bearing of the bottom plate (205), the other end of the lead screw (3) penetrates through the bearing of the other end of the bottom plate (205), the lead screw (3) is connected with the bearing of the bearing bar (201), and the side of the lead screw (3) is provided with left-handed thread wall and right-handed thread wall.

7. The device for precise control of cement quantity for pipe-in-pipe lining according to claim 6, characterized in that: The outside of the lead screw (3) is provided with two sliding blocks (301), one sliding block (301) is connected with the left-handed thread wall of the lead screw (3), and the other sliding block (301) is connected with the right-handed thread wall of the lead screw (3).

8. The device for precise control of cement quantity for pipe-in-pipe lining according to claim 7, characterized in that: The upper surface of the sliding block (301) is provided with a transmission block (3011), the inside of the transmission block (3011) is provided with a long slot (3012), the inside of the long slot (3012) is provided with a transmission shaft (3021), and the transmission shaft (3021) is connected with the lower end of the stabilizing rod (302).

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