Valve installation auxiliary device

Abstract

The utility model relates to the technical field of valves, and particularly discloses a valve installation auxiliary device which comprises a connecting arm. The positioning head and the assembling head are installed at the two ends of the connecting arm respectively, and the central axis of the positioning head and the central axis of the assembling head are collinear; a positioning groove is formed in the positioning head, the shape and the size of the positioning groove are matched with the peripheral contour of a bolt or a nut on the upper half portion of the valve flange, and the positioning groove is used for being in positioning fit with the bolt or the nut. The assembling head is provided with an assembling hole, the axis of the assembling hole coaxially corresponds to the axis of a bolt hole in the lower half portion of the valve flange, and the assembling hole is used for containing a bolt or a nut to be installed. Through the coaxial and collinear design of the positioning head and the assembling head, rapid positioning of upper and lower flange bolt holes is achieved, and tedious operation of manual alignment is avoided; a sliding adjusting structure of the connecting assembly can adapt to bolt hole distances of different valves, and modular replacement of the positioning sleeve can adapt to different bolt sizes.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, and specifically relates to a valve installation auxiliary device. Background Technology

[0002] Valve installation auxiliary devices are tools or equipment used to simplify valve installation processes, improve installation accuracy, and ensure operational safety. They are widely used in industrial pipeline systems, petrochemicals, power generation, water treatment, and other fields, and are indispensable, especially in the installation of large, heavy, or high-precision valves.

[0003] A search revealed that CN222725979U discloses an auxiliary device for valve installation, including a fixing frame and a support rod assembly. Multiple connecting rods are provided between the fixing frame and the support rod assembly. One end of each connecting rod is detachably connected to the support rod assembly. The fixing frame has an adjustment hole that matches the clearance of the connecting rod. The other end of the connecting rod passes through the corresponding adjustment hole and is threadedly connected to a limiting nut abutting against the side of the fixing frame facing away from the support rod assembly. Multiple flange limiting blocks are fixed on the fixing frame, and multiple valve seat support ring limiting blocks are fixed on the support rod assembly.

[0004] When installing valves in narrow spaces such as pre-buried pipe trenches, the bottom bolts are difficult to position and tighten. Even power tools that drive the bolts and nuts cannot be used in depth. Existing valve installation auxiliary devices cannot provide auxiliary positioning and installation for bolts and nuts when installing valves in narrow spaces such as pre-buried pipe trenches. Utility Model Content

[0005] The purpose of this utility model is to provide a valve installation auxiliary device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A valve installation auxiliary device, comprising:

[0008] Connecting arm;

[0009] The positioning head and the assembly head are respectively installed at both ends of the connecting arm, and the central axes of the positioning head and the assembly head are collinear;

[0010] The positioning head is provided with a positioning groove, the shape and size of which are adapted to the outer circumferential contour of the bolt or nut on the upper half of the valve flange, and are used to form a positioning fit with the bolt or nut.

[0011] The assembly head is provided with an assembly hole, the axis of which is coaxial with the axis of the bolt hole in the lower half of the valve flange, for accommodating the bolt or nut to be installed.

[0012] The axis of the assembly hole is parallel to the axis of the positioning groove and the distance between them is equal to the diameter of the distribution circle of the valve flange bolt holes.

[0013] Preferably, both ends of the connecting arm are provided with connecting components. The positioning head and the assembly head are detachably connected to the connecting arm through the connecting components. The positioning head and the assembly head can be slidably adjusted along the length of the connecting arm to change the distance between the positioning groove and the assembly hole.

[0014] Preferably, the connecting assembly includes a bolt and a nut. The bolt passes through one end of the connecting arm, and a first through hole is provided on the positioning head. The bolt passes through the first through hole, and the nut is threaded onto the bolt and abuts against the end face of the positioning head to fix the position of the positioning head on the connecting arm.

[0015] Preferably, the assembly head has a second through hole, and the nut is threaded onto the bolt and abuts against the end face of the assembly head to fix the position of the assembly head on the connecting arm.

[0016] Preferably, a mounting hole is provided on one side of the assembly head, and a connecting seat is installed in the mounting hole, wherein the assembly hole is provided on the connecting seat.

[0017] Preferably, the assembly head includes:

[0018] The first gear is fixedly sleeved on the outer periphery of the connecting seat;

[0019] A power source is fixedly mounted on the assembly head. A second gear is fixedly connected to the output shaft of the power source. The second gear meshes with the first gear and is used to drive the connecting seat to rotate.

[0020] Preferably, a first magnetic element is embedded in the inner wall of the positioning groove for attracting positioning bolts or nuts.

[0021] Preferably, a second magnetic element is embedded in the inner wall of the assembly hole to attract and fix the bolt or nut to be installed.

[0022] Preferably, a washer is provided between the nut and the positioning head, and the washer is fitted onto the bolt.

[0023] Preferably, a positioning sleeve is installed in the positioning groove. The positioning sleeve includes various specifications, and the inner diameter of each specification of positioning sleeve is adapted to bolts or nuts of different sizes.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] This utility model achieves rapid positioning of the bolt holes on the upper and lower flanges through the coaxial and collinear design of the positioning head and the assembly head, avoiding the tedious operation of manual alignment; the sliding adjustment structure of the connecting component can adapt to the bolt hole spacing of different valves, and the modular replacement of the positioning sleeve can adapt to different bolt sizes; the gear drive mechanism can electrically adjust the angle of the assembly hole, and combined with the adsorption function of the magnetic component, it improves the convenience of installation in narrow spaces. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is a three-dimensional structural diagram of the present invention from another perspective;

[0028] Figure 3 This is an enlarged view of the positioning head of this utility model;

[0029] Figure 4 This is an enlarged view of the assembly head of this utility model;

[0030] Figure 5 This is a schematic diagram of the assembly head, first gear, and second gear of this utility model.

[0031] In the diagram: 10. Connecting arm; 11. Bolt; 12. Nut; 20. Positioning head; 21. First through hole; 22. Positioning groove; 23. First magnetic chuck; 30. Assembly head; 31. Second through hole; 32. Mounting hole; 33. Connecting seat; 34. Assembly hole; 35. Second magnetic chuck; 36. First gear; 37. Second gear; 38. Power source. Detailed Implementation

[0032] 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.

[0033] Reference Figure 1-5A valve installation auxiliary device includes: a connecting arm 10; a positioning head 20 and an assembly head 30, respectively installed at both ends of the connecting arm 10, with the central axes of the positioning head 20 and the assembly head 30 collinear; the positioning head 20 has a positioning groove 22, the shape and size of which are adapted to the outer circumferential contour of the bolt 11 or nut 12 on the upper half of the valve flange, for forming a positioning fit with the bolt 11 or nut 12; the assembly head 30 has an assembly hole 34, the axis of which is coaxial with the axis of the bolt 11 hole on the lower half of the valve flange, for accommodating the bolt 11 or nut 12 to be installed; the axis of the assembly hole 34 is parallel to the axis of the positioning groove 22 and the distance between them is equal to the diameter of the distribution circle of the bolt 11 holes on the valve flange.

[0034] The connecting arm 10 is rod-shaped or plate-shaped. Its small size makes it more convenient to use and can assist in valve installation in confined spaces, especially in the installation of bolts 11 and nuts 12 on valve flanges. Through the coaxial and collinear design of the positioning head 20 and the assembly head 30, the bolt holes 11 of the upper and lower flanges can be quickly positioned, avoiding the tedious manual alignment. Since the bolt holes 11 of valve flanges are generally centrally symmetrically distributed (common in standard flanges such as ASME B16.5), the axis can be determined by the known hole positions in the upper half, and the hole positions in the lower half can be automatically aligned through symmetry. The bolt 11 positioning seats at both ends and the rigid arm form a physical reference, avoiding random errors caused by manual exploration. A single positioning can solve the alignment problem of the upper and lower bolt holes simultaneously, reducing the time spent on repeated adjustments. Workers do not need to judge the hole offset based on experience, making it suitable for novice operators. Theoretically, it is applicable to any symmetrically distributed bolt hole 11 valve (such as 8-hole and 12-hole flanges).

[0035] By fitting the positioning head 20 onto the bolts 11 or nuts 12 on the upper half of the flange, the bolts 11 or nuts 12 pre-placed on the assembly head 30 can be installed into the positioning holes on the lower half of the flange. When installing the nuts 12, the power source 38 can also be used to drive the nuts 12 to rotate, thereby achieving automatic installation of the nuts 12.

[0036] Both ends of the connecting arm 10 are provided with connecting components. The positioning head 20 and the assembly head 30 are detachably connected to the connecting arm 10 through the connecting components. The positioning head 20 and the assembly head 30 can slide and adjust along the length of the connecting arm 10 to change the distance between the positioning groove 22 and the assembly hole 34.

[0037] The connecting assembly includes a bolt 11 and a nut 12. The bolt 11 passes through one end of the connecting arm 10. The positioning head 20 has a first through hole 21. The bolt 11 passes through the first through hole 21. The nut 12 is threaded onto the bolt 11 and abuts against the end face of the positioning head 20 to fix the position of the positioning head 20 on the connecting arm 10.

[0038] When the nut 12 is loosened, the positioning head 20 and the assembly head 30 can slide along the adjustment hole of the connecting arm 10, changing the distance between the positioning groove 22 and the assembly hole 34 (i.e., the distance between the two axes). This distance is equal to the diameter (or center distance) of the distribution circle of the valve flange bolt 11 holes. When the nut 12 is tightened, the gasket is compressed and undergoes elastic deformation, which locks the positioning head 20 / assembly head 30 and the connecting arm 10 through friction, ensuring that the position is stable after adjustment.

[0039] The assembly head 30 has a second through hole 31. The nut 12 is threaded onto the bolt 11 and abuts against the end face of the assembly head 30 to fix the position of the assembly head 30 on the connecting arm 10. A washer is provided between the nut 12 and the positioning head 20, and the washer is sleeved on the bolt 11.

[0040] The assembly head 30 has a mounting hole 32 on one side, and a connecting seat 33 is installed in the mounting hole 32. The assembly hole 34 is opened on the connecting seat 33.

[0041] The assembly head 30 includes: a first gear 36, which is fixedly sleeved on the outer periphery of the connecting seat 33; and a power source 38, which is fixedly installed on the assembly head 30. A second gear 37 is fixedly connected to the output shaft of the power source 38. The second gear 37 meshes with the first gear 36 and is used to drive the connecting seat 33 to rotate.

[0042] The power source 38 uses a servo motor or a micro motor to drive the second gear 37 to rotate, which in turn drives the first gear 36 and the connecting seat 33 to rotate synchronously, thereby achieving circumferential angle adjustment of the assembly hole 34 and ensuring precise alignment with the flange bolt 11 hole.

[0043] The inner wall of the positioning groove 22 is provided with a first magnetic suction element 23, which is used to attract the positioning bolt 11 or nut 12.

[0044] A second magnetic element 35 is embedded in the inner wall of the assembly hole 34 to attract and fix the bolt 11 or nut 12 to be installed.

[0045] The first magnetic clasp 23 and the second magnetic clasp 35 use strong magnets or magnetic sheets to attract and fix the bolts 11 or nuts 12 to be installed, preventing the bolts 11 or nuts 12 from falling off the assembly head 30 during docking, and also facilitating one-handed operation.

[0046] A positioning sleeve is installed in the positioning groove 22. The positioning sleeve includes various specifications. The inner diameter of each specification of positioning sleeve is adapted to bolts 11 or nuts 12 of different sizes. The positioning sleeve can also be installed in the assembly hole 34, and different inner diameters can be switched to adapt to bolts 11 or nuts 12 of different sizes. The inner diameters of each specification are adapted to bolts 11 or nuts 12 of different sizes such as M8, M10, and M12. Different valve specifications can be quickly adapted by changing the positioning sleeve.

[0047] The working principle and usage process of this utility model are as follows: According to the specifications of the target valve flange bolt 11 / nut 12 (such as M8, M10, M12), select the positioning sleeve with the corresponding inner diameter from the matching sleeve group (both positioning head 20 and assembly head 30 can be installed), and detachably fit the positioning sleeve along the buckle or threaded interface at the front end of the positioning head 20 to ensure that the inner wall of the positioning groove 22 or assembly hole 34 is tightly fitted with the outer contour of the bolt 11 / nut 12.

[0048] Adjust the distance between the positioning head 20 and the assembly head 30 to match the diameter of the distribution circle of the bolt 11 holes. Rotate the nuts 12 at both ends of the connecting arm 10 to separate the gasket from the end face of the positioning head 20 / assembly head 30, releasing the friction lock. Slide the positioning head 20 and the assembly head 30 along the length of the connecting arm 10 so that the distance between them is equal to the center distance of the bolt 11 holes on the valve flange. Tighten the nuts 12, and the gasket will be compressed and undergo elastic deformation, fixing the positioning head 20 / assembly head 30 to the connecting arm 10 through friction.

[0049] Insert the bolt 11 (screw facing down) or nut 12 into the assembly hole 34 of the assembly head 30 and fix it by the second magnetic suction 35 to prevent it from falling off. Align the positioning groove 22 of the positioning head 20 with the bolt 11 or nut 12 that has been installed on the valve flange, such as the bolt 11 exposed at the top of the valve. Fix it by the first magnetic suction 23 to ensure that the positioning groove 22 is fully engaged with the outer contour of the bolt 11 / nut 12 to form an axial reference. Since the central axis of the positioning head 20 and the assembly head 30 are collinear and the distance is equal to the diameter of the distribution circle of the bolt 11 holes, the axis of the assembly hole 34 of the assembly head 30 is automatically coaxial with the axis of the corresponding bolt 11 hole of the lower flange. The assembly head 30 drives the bolt 11 to be inserted into the corresponding bolt 11 hole.

[0050] Positioning head 20 is placed over the lower flange bolt 11, assembly head 30 is aligned with the upper flange bolt 11 hole, nut 12 is inserted and fixed by the second magnetic 35, and the power source 38 of assembly head 30 is activated, driving the connecting seat 33 to rotate through gear transmission. Nut 12 rotates with assembly hole 34 and tightens along the thread of bolt 11 until pre-tightening is completed. Utilizing the small-volume rod / plate design of connecting arm 10, it extends into the confined space from the side or top, and establishes a reference by adsorbing upper flange bolt 11 through positioning head 20. There is no need to visually align the lower flange hole; the assembly hole 34 can be automatically aligned based solely on the physical axis of the device. For bolt 11 holes that are centrally symmetrically distributed (such as ASME B16.5 standard flanges), only one upper flange bolt 11 needs to be positioned, and assembly head 30 can automatically align with the lower flange hole at the symmetrical position through spacing adjustment and the principle of collinearity of axis, without the need to calibrate each hole position individually.

[0051] The connecting arm 10 adopts a rod-shaped / plate-shaped small volume design with a cross-sectional size of ≤50mm×30mm. It can be extended laterally / longitudinally along the side wall of the tunnel groove or the gap of the pipe, breaking through the limitations of traditional tools that are "large in size and require vertical operating space".

[0052] The positioning head 20 and the assembly head 30 are axially colinear, eliminating the need for additional rotation space. Only a narrow channel with a diameter ≥80mm is required to complete the axial alignment of the upper and lower flange bolt holes 11 (traditional tools require an operating diameter ≥200mm).

[0053] By using the positioning head 20 to mount the existing bolts 11 / nuts 12 on the upper flange (such as the bolts 11 exposed at the top of the groove), and utilizing the collinearity of the axes of the rigid connecting arm 10, the reference hole position of the upper flange can be directly mapped to the target hole position of the lower flange. This eliminates the need for operators to bend over or use an endoscope to observe the bottom hole position, thus solving the problem of "obstructed vision and difficulty in manual alignment".

[0054] The first / second magnetic attraction 35 on the inner wall of the positioning groove 22 and the assembly hole 34 can attract bolts 11 / nuts 12 of M8-M12 specifications, ensuring that the bolts 11 are stably fixed in a suspended state in a narrow space, and preventing the bolts 11 from falling or shifting due to the inability of the hand to exert force.

[0055] The positioning sleeve and the assembly hole 34 sleeve adopt a standard contour adaptation design such as hexagonal / circular. By changing the sleeve with different inner diameter (such as M10 sleeve corresponding to φ17mm bolt 11 head), the outer circumference of bolt 11 / nut 12 can be tightly locked to form a mechanical limit. Combined with magnetic attraction, "double positioning" is achieved. Even in horizontal or inverted installation scenarios (such as groove sidewall valve), it can ensure that the axis of bolt 11 is strictly coaxial with the hole position.

[0056] This solution fills a gap in existing technologies for valve installation in confined spaces, and is particularly suitable for scenarios with stringent operating space requirements, such as nuclear power plants, chemical plants, and underground utility tunnels.

[0057] 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 valve installation auxiliary device, characterized in that, include: Connecting arm (10); The positioning head (20) and the assembly head (30) are respectively installed at both ends of the connecting arm (10), and the central axes of the positioning head (20) and the assembly head (30) are collinear; The positioning head (20) is provided with a positioning groove (22). The shape and size of the positioning groove (22) are adapted to the outer periphery of the bolt (11) or nut (12) on the upper half of the valve flange, and are used to form a positioning fit with the bolt (11) or nut (12). The assembly head (30) is provided with an assembly hole (34), the axis of which is coaxial with the axis of the bolt (11) hole in the lower half of the valve flange, and is used to accommodate the bolt (11) or nut (12) to be installed. The axis of the assembly hole (34) is parallel to the axis of the positioning groove (22) and the distance between them is equal to the diameter of the distribution circle of the valve flange bolt (11) holes.

2. The valve installation auxiliary device according to claim 1, characterized in that: Both ends of the connecting arm (10) are provided with connecting components. The positioning head (20) and the assembly head (30) are detachably connected to the connecting arm (10) through the connecting components. The positioning head (20) and the assembly head (30) can slide and adjust along the length direction of the connecting arm (10) to change the distance between the positioning groove (22) and the assembly hole (34).

3. The valve installation auxiliary device according to claim 2, characterized in that: The connecting assembly includes a bolt (11) and a nut (12). The bolt (11) passes through one end of the connecting arm (10). The positioning head (20) has a first through hole (21). The bolt (11) passes through the first through hole (21). The nut (12) is threaded onto the bolt (11) and abuts against the end face of the positioning head (20) to fix the position of the positioning head (20) on the connecting arm (10).

4. The valve installation auxiliary device according to claim 3, characterized in that: The assembly head (30) has a second through hole (31), and the nut (12) is threaded onto the bolt (11) and abuts against the end face of the assembly head (30) to fix the position of the assembly head (30) on the connecting arm (10).

5. The valve installation auxiliary device according to claim 1, characterized in that: The assembly head (30) has an installation hole (32) on one side, and a connecting seat (33) is installed in the installation hole (32). The assembly hole (34) is opened on the connecting seat (33).

6. The valve installation auxiliary device according to claim 5, characterized in that: The assembly head (30) includes: The first gear (36) is fixedly sleeved on the outer periphery of the connecting seat (33); A power source (38) is fixedly installed on the assembly head (30). A second gear (37) is fixedly connected to the output shaft of the power source (38). The second gear (37) meshes with the first gear (36) to drive the connecting seat (33) to rotate.

7. The valve installation auxiliary device according to claim 1, characterized in that: The inner wall of the positioning groove (22) is provided with a first magnetic suction element (23) for adsorbing the positioning bolt (11) or nut (12).

8. The valve installation auxiliary device according to claim 1, characterized in that: The inner wall of the assembly hole (34) is provided with a second magnetic suction element (35) for adsorbing and fixing the bolt (11) or nut (12) to be installed.

9. The valve installation auxiliary device according to claim 3, characterized in that: A washer is provided between the nut (12) and the positioning head (20), and the washer is fitted onto the bolt (11).

10. The valve installation auxiliary device according to claim 1, characterized in that: A positioning sleeve is installed in the positioning groove (22). The positioning sleeve includes various specifications, and the inner diameter of each specification of positioning sleeve is adapted to bolts (11) or nuts (12) of different sizes.

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