A kind of cast pipe water pressure detection guard device

Abstract

The utility model discloses a kind of for cast pipe water pressure detection protection device, including protective frame, protective frame includes the protective net wall of three triangular square steel composition and the support column of being set in the both sides of protective net wall, four corners of protective net wall are provided with guide wheel, guide wheel is set in the sliding slot of support column, the pulley bracket of being connected with support column by connecting plate is set in the top of support column, left pulley of single slot is equipped on one side pulley bracket, right pulley of single slot and total pulley of double slot are equipped on the other side pulley bracket, the steel wire rope of left pulley and right pulley one end is respectively connected with the two sides hook of being set in protective net wall, the steel wire rope of left pulley and right pulley other end is respectively extended to the double slot of total pulley and finally connected with the drive oil cylinder of being arranged in support column side.The utility model realizes that protective net wall can keep uniform speed and stable trajectory in lifting process, avoid the equipment failure caused by different step and jamming etc.

Description

Technical Field

[0001] This utility model relates to the field of mechanical tooling, and in particular to a protective device for water pressure testing of cast iron pipes. Background Technology

[0002] Traditional protective devices use a dual-cylinder drive system. During operation, the two sides are prone to asynchrony, which can cause the guide wheels on both sides to jam. The jamming of the guide wheels accelerates the deformation of the protective net and damage to the cylinders, increasing the frequency and cost of maintenance. At the same time, frequent equipment failures affect the production rhythm, resulting in reduced machine efficiency and inability to meet high production demands.

[0003] To address the issues of asynchronous operation and guide wheel jamming in the dual-cylinder drive system, the transmission paths on both sides were optimized by adopting a pulley system and a single cylinder. This resulted in smoother transmission, allowing the guardrail to maintain a uniform speed and stable trajectory during lifting and lowering. This prevented equipment failures caused by asynchrony and jamming, and the stable operation also improved the continuity and reliability of production. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the prior art by providing a protective device for water pressure testing of cast iron pipes.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A protective device for water pressure testing of cast iron pipes includes a protective frame, the protective frame comprising a protective mesh wall and supporting columns disposed on both sides of the protective mesh wall. The device is characterized in that guide wheels are connected to the four opposite corners of the protective mesh wall, the guide wheels are disposed in the grooves of the supporting columns, and a pulley bracket connected to the supporting columns via a connecting plate is disposed above the supporting columns. One side of the pulley bracket has a single-groove left pulley, and the other side of the pulley bracket has a single-groove right pulley and a double-groove main pulley. The steel wire ropes at one end of the left and right pulleys are respectively connected to hooks disposed on both sides of the protective mesh wall, and the steel wire ropes at the other end of the left and right pulleys extend to the double grooves of the main pulley and are connected to a drive cylinder disposed beside the supporting columns.

[0006] This utility model's protective device for water pressure testing of cast iron pipes replaces the traditional dual-cylinder drive system with a single-cylinder drive, and adds a dual-pulley system to the supporting column. The optimized transmission path ensures the protective netting wall maintains a uniform speed and stable trajectory during lifting and lowering, achieving synchronous rise and fall on both sides. This avoids equipment jamming and malfunctions caused by dual-cylinder drives. The drive cylinder, acting as a single-sided power source, controls two steel wire ropes, providing excellent synchronization. When replacing the middle cast iron pipe, simply activate the drive cylinder; the steel wire ropes pass around the main pulley, left pulley, and right pulley, simultaneously lifting the protective netting wall. During normal operation of the cast iron pipe, the drive cylinder simultaneously lowers the steel wire ropes, providing excellent protection against accidents such as pipe bursts and high-pressure liquid spray. Four guide wheels are installed at the four opposite corners of the protective netting wall, matching the sliding grooves on the supporting column, reducing friction between the protective netting wall and the pulleys during lifting and lowering, resulting in smoother transmission.

[0007] Furthermore, the protective netting includes two parallel horizontal beams, with several vertical square steel plates and several inclined square steel plates arranged between the beams, and the guide wheels are located at both ends of the horizontal beams.

[0008] The protective netting wall, as the main protective device, consists of two parallel horizontal beams and several vertical and inclined square steel plates placed between the two parallel horizontal beams. Guide wheels at both ends of the upper and lower horizontal beams drive the frame to move up and down as a whole.

[0009] Furthermore, the left pulley, the right pulley, and the main pulley are positioned at the same height.

[0010] The steel wire ropes on the left and right pulleys are connected to the hooks on both sides of the protective net wall, and the other end of the steel wire ropes on the left and right pulleys are connected to the main pulley. The left pulley, right pulley and main pulley are at the same horizontal height, so as to ensure that the protective net wall is lifted and lowered synchronously.

[0011] Furthermore, the protective mesh wall is perpendicular to the groove on the supporting column.

[0012] Four guide wheels are installed at the four opposite corners of the protective net wall, with a pair on each side. The guide wheels move up and down in the grooves of the supporting columns. The perpendicularity between the protective net wall and the grooves on the supporting columns is also to ensure that the protective net walls on the left and right sides move synchronously on the lifting path, so as not to cause jamming and equipment lifting failure.

[0013] Furthermore, a buffer stop bar is provided at the lower end of the sliding groove of the supporting column.

[0014] The buffer stop bar, welded from channel steel to the bottom of the chute, effectively buffers and stops the protective netting as it descends to its lowest point. When the netting accelerates to its lowest point, the drive cylinder suddenly stops, but the netting still tends to move downwards due to inertia. The wire rope has a certain degree of elasticity, and the force applied to it, including the acceleration, is greater than the weight of the netting itself. The protective netting, constructed from square steel and netting, is quite heavy; adding the buffer stop bar provides cushioning protection during its accelerated descent.

[0015] Furthermore, a rotatable maintenance stop plate is provided on the top of one of the supporting columns via a hinge.

[0016] When it is necessary to inspect and repair the inside of the cast iron pipe, the drive cylinder pulls up the protective net wall so that the inspection personnel can enter. However, relying solely on the steel wire rope to pull up the protective net wall cannot completely guarantee safety. By installing a hinged movable maintenance stop plate on the support column, when it is necessary to pull up the protective net wall, the movable maintenance stop plate is rotated to lock the protective net wall and prevent it from falling, thus further ensuring that the protective net wall does not fall.

[0017] Furthermore, the outer side of the protective mesh wall can also be wrapped with fine wire mesh.

[0018] The first layer of protection in the protective fence consists of triangular square steel bars, which provide the main protection during the accidental bursting of the cast iron pipe. However, the gaps between the right-angled square steel bars are large. If a layer of fine wire mesh is added to the outside of the protective fence, the gaps between the outer fine wire mesh are smaller, which can provide double protection.

[0019] Furthermore, two protective devices for water pressure testing of cast iron pipes are provided, and the two protective devices for water pressure testing of cast iron pipes are distributed opposite to each other on both sides of the cast iron pipe.

[0020] Cast iron pipes require frequent inspection and replacement over a period of time. Accidents such as pipe bursts under high water pressure need to be prevented in advance. In actual operation, the protective device of this utility model can be installed at both ends of the cast iron pipe to provide good protection for both sides and reduce the safety problems caused by accidental risks (pipe bursts).

[0021] Compared with the prior art, the beneficial effects of this utility model are: 1. The present invention provides a protective device for water pressure testing of cast iron pipes, which ensures the synchronous lifting and lowering of the protective net wall, directly transmits power to the net, optimizes the transmission path, reduces intermediate transmission links, and improves transmission efficiency; the pulley system is reasonably laid out, realizes uniform power distribution, smooth operation, avoids equipment failure caused by asynchrony or jamming, and ensures production continuity. 2. This utility model has single-groove left and right pulleys and double-groove main pulley at the same height on the protective net wall. One end of the steel wire rope on the single-groove left and right pulleys is connected to the hooks on both sides of the protective net wall, and the two steel wire ropes are connected to the drive cylinder synchronously through the double-groove main pulley to realize power transmission and ensure that the two sides of the protective net wall are raised and lowered synchronously. 3. This utility model has a buffer stop bar at the bottom of the chute, which bears the impact through upward support force and distributes the tension of the wire rope, thus preventing the wire rope from breaking due to overload. The movable maintenance stop plate on the support column can be rotated to prevent the protective net wall from falling when it is pulled up, further ensuring the safety of the inspection personnel. Attached Figure Description

[0022] Figure 1 This utility model discloses a front view of a protective device for water pressure testing of cast iron pipes. Figure 2 This utility model discloses a left view of a protective device for water pressure testing of cast iron pipes. In the diagram: 1. Protective netting; 2. Supporting column; 3. Guide wheel; 4. Left pulley; 5. Right pulley; 6. Main pulley; 7. Drive cylinder; 8. Movable maintenance stop plate; 9. Buffer stop bar. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "left", "right", "horizontal", "vertical", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0025] The specific embodiments of this utility model are described in conjunction with the appendix. Figure 1 and attached Figure 2 Let me explain further.

[0026] A protective device for water pressure testing of cast iron pipes includes a protective frame, which comprises a protective mesh wall 1 and supporting columns 2 disposed on both sides of the protective mesh wall 1. The protective mesh wall 1 is characterized by having guide wheels 3 connected to its four opposite corners. The guide wheels 3 are disposed in grooves in the supporting columns 2. A pulley bracket connected to the supporting columns 2 via a connecting plate is disposed above the supporting columns 2. One side of the pulley bracket has a single-groove left pulley 4, and the other side has a single-groove right pulley 5 and a double-groove main pulley 6. The wire ropes at one end of the left pulley 4 and the right pulley 5 are respectively connected to hooks on both sides of the protective mesh wall 1. The wire ropes at the other end of the left pulley 4 and the right pulley 5 extend to the double grooves of the main pulley 6 and are connected to a drive cylinder 7 disposed beside the supporting columns 2.

[0027] Traditional dual-cylinder drive systems are prone to asynchronous lifting and lowering of the left and right sides during operation. The guide wheel 3 also jams, accelerating the deformation of the protective net and damaging the cylinders, increasing maintenance frequency and costs. This invention addresses this issue by optimizing the transmission path, enabling the protective net wall 1 to maintain a uniform speed and stable trajectory during lifting and lowering. This achieves synchronous rising and falling of both sides of the protective net wall 1, avoiding equipment jamming and malfunctions caused by dual-cylinder drives.

[0028] A pulley bracket was added to the supporting column 2. The pulley bracket is equipped with a single-groove left pulley 4 and a single-groove right pulley 5 at the same height, as well as a double-groove main pulley 6. The left pulley 4 and right pulley 5 are used to guide the lifting wire ropes, while the double-groove main pulley 6 guides the wire ropes on both sides of the protective net wall 1 to the drive cylinder 7. The drive cylinder 7 acts as a single-sided power source, simultaneously controlling both wire ropes. When the intermediate cast pipe needs to be replaced, the drive cylinder 7 lifts the protective net wall 1 synchronously by bypassing the wire ropes of the main pulley 6, left pulley 4, and right pulley 5. During normal operation of the cast pipe, the drive cylinder 7 drives the wire ropes to fall synchronously. This provides excellent protection against accidents such as pipe bursts or high-pressure liquid spraying. Four guide wheels 3 are installed at the four opposite corners of the protective net wall 1, matching the grooves on the supporting column 2. This reduces the friction between the protective net wall 1 and the pulleys during lifting and lowering, resulting in smoother transmission.

[0029] Furthermore, the protective net wall 1 includes two parallel horizontal beams, with several vertical square steel plates and several inclined square steel plates arranged between the horizontal beams, and the guide wheels 3 are arranged at both ends of the horizontal beams.

[0030] The protective net wall 1 serves as the main protective device. Its frame consists of two parallel horizontal beams and several vertical and inclined square steel plates placed between the two parallel horizontal beams. Guide wheels 3, located at both ends of the upper and lower horizontal beams, drive the entire frame to move up and down.

[0031] Furthermore, the left pulley 4, the right pulley 5, and the main pulley 6 are positioned at the same height.

[0032] The steel wire ropes on the left pulley 4 and the right pulley 5 are respectively connected to the hooks on both sides of the protective net wall. At the same time, the other end of the steel wire ropes on the left pulley 4 and the right pulley 5 are connected to the main pulley 6. The left pulley 4, the right pulley 5 and the main pulley 6 are at the same horizontal height, thus ensuring that the protective net wall 1 is lifted and lowered synchronously.

[0033] Furthermore, the protective net wall 1 is perpendicular to the groove on the supporting column 2.

[0034] Four guide wheels 3 are set at the four opposite corners of the protective net wall 1, with a pair on each side. The guide wheels 3 move up and down in the sliding groove of the support column 2. The verticality of the protective net wall 1 and the sliding groove on the support column 2 is also to ensure that the left and right sides of the protective net wall 1 move synchronously on the lifting path, so as not to cause jamming and equipment lifting failure.

[0035] Furthermore, a buffer stop bar 9 is provided at the lower end of the sliding groove of the supporting column 2.

[0036] The buffer stop bar 9 is made of welded channel steel and is located 3mm above the bottom of the chute. When the protective net wall 1 accelerates down to the lowest point, the single-sided drive cylinder 7 suddenly stops driving the wire rope. At this time, the protective net wall 1 still tends to move downward due to inertia. The force on the wire rope is an accelerating force that is greater than the weight of the net itself. In addition, the wire rope itself may have a certain degree of elasticity, so the protective net wall 1 may continue to descend and hit the bottom. Or, the protective net wall 1 is made of square steel and protective net, which is heavy and may cause the wire rope to break. The buffer stop bar 9, which is set 3mm above the bottom of the chute, can provide buffer protection for the protective net wall 1, thereby avoiding the sudden overload and breakage of the wire rope.

[0037] Furthermore, a rotatable maintenance stop plate 8 is provided on the top of the supporting column 2 on one side via a hinge.

[0038] When internal inspection and maintenance of the cast iron pipe is required, the hydraulic cylinder 7 pulls up the protective mesh wall 1, allowing inspection personnel to enter. However, relying solely on the steel wire rope to pull up the protective mesh wall 1 cannot fully guarantee safety. A hinged movable maintenance stop plate 8 is installed on the support column 2. When the protective mesh wall 1 needs to be pulled up, rotating the movable maintenance stop plate 8 will lock the protective mesh wall 1 in place, preventing it from falling and further ensuring its stability. When the protective mesh wall 1 is pulled up by the steel wire rope for extended maintenance, the movable maintenance stop plate 8 can be positioned 3mm below the protective mesh. Then, rotating the movable maintenance stop plate 8 will lock one end of the protective mesh wall 1, preventing it from falling. Simultaneously, the steel wire rope above the protective mesh will also pull on the protective mesh wall 1, forming constraints at both ends to ensure safety.

[0039] Furthermore, the outer side of the protective net wall 1 can also be wrapped with fine wire mesh.

[0040] The first layer of the protective mesh wall consists of triangular square steel bars, which provide the main protection during the accidental bursting of the cast iron pipe. However, the gaps between the right-angled square steel bars are large. If a layer of fine wire mesh is added to the outside of the protective mesh wall, the gaps between the outer fine wire mesh will be smaller, thus providing double protection.

[0041] Furthermore, two protective devices for water pressure testing of cast iron pipes are provided, and the two protective devices for water pressure testing of cast iron pipes are distributed opposite to each other on both sides of the cast iron pipe.

[0042] Cast iron pipes require frequent inspection and replacement over a period of time. Accidents such as pipe bursts under high water pressure need to be prevented in advance. In actual operation, the protective device of this utility model can be installed at both ends of the cast iron pipe to provide good protection for both sides and reduce the safety problems caused by accidental risks (pipe bursts).

[0043] The above-described embodiment of the present invention provides a protective device for water pressure testing of cast iron pipes. Through various pulley group components and buffer stop mechanisms, the protective net wall 1 is dynamically lifted and braked in an emergency. During the water pressure testing of cast iron pipes, the testing area is safely isolated to prevent safety accidents caused by high-pressure water splashing or pipe rupture.

[0044] 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, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A protective device for water pressure testing of cast iron pipes, comprising a protective frame, the protective frame including a protective mesh wall (1) and supporting columns (2) disposed on both sides of the protective mesh wall (1), characterized in that, The protective net wall (1) is connected to four opposite corners with guide wheels (3). The guide wheels (3) are set in the grooves of the support column (2). The support column (2) is provided with a pulley bracket connected to the support column (2) by a connecting plate. One side of the pulley bracket is provided with a single groove left pulley (4). The other side of the pulley bracket is provided with a single groove right pulley (5) and a double groove total pulley (6). The steel wire ropes at one end of the left pulley (4) and the right pulley (5) are respectively connected to the hooks on both sides of the protective net wall (1). The steel wire ropes at the other end of the left pulley (4) and the right pulley (5) extend to the double groove of the total pulley (6) and are connected to the drive cylinder (7) located next to the support column (2).

2. The protective device for water pressure testing of cast iron pipes according to claim 1, characterized in that, The protective net wall (1) includes two parallel horizontal beams, with several vertical square steel plates and several inclined square steel plates arranged between the horizontal beams, and the guide wheels (3) are arranged at both ends of the horizontal beams.

3. The protective device for water pressure testing of cast iron pipes according to claim 1, characterized in that, The left pulley (4), the right pulley (5), and the main pulley (6) are set at the same height.

4. The protective device for water pressure testing of cast iron pipes according to claim 1, characterized in that, The protective net wall (1) is perpendicular to the groove on the supporting column (2).

5. A protective device for water pressure testing of cast iron pipes according to claim 1, characterized in that, The lower end of the sliding groove of the supporting column (2) is provided with a buffer stop bar (9).

6. The protective device for water pressure testing of cast iron pipes according to claim 1, characterized in that, A rotatable maintenance stop plate (8) is provided on the top of the supporting column (2) on one side via a hinge.

7. The protective device for water pressure testing of cast iron pipes according to claim 1, characterized in that, The outer side of the protective net wall (1) may also be covered with fine wire mesh.

8. The protective device for water pressure testing of cast iron pipes according to any one of claims 1-7, characterized in that, Two protective devices for water pressure testing of cast iron pipes are provided, and the two protective devices for water pressure testing of cast iron pipes are distributed opposite each other on both sides of the cast iron pipe.

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