CN216229190U - Special tool for valve maintenance - Google Patents

Abstract

The utility model relates to a special tool for valve maintenance, which comprises a left hoop and a right hoop, wherein the left hoop and the right hoop are used for hooping and sleeving two corresponding pipelines at two sides of a valve to be replaced; the special tool for maintaining the valve further comprises a middle push-pull structure, and the middle push-pull structure is used for pushing and pulling the two hoops to drive the two corresponding pipelines to approach in opposite directions and to be away in opposite directions; the middle push-pull structure comprises a left push-pull screw rod, a right push-pull screw rod and a middle rotating threaded sleeve; the left push-pull screw rod is hinged with the left hoop, the right push-pull screw rod is hinged with the right hoop, the left push-pull screw rod penetrates into the left end of the middle rotating threaded sleeve from the left side in a spiral mode, the right push-pull screw rod penetrates into the right end of the middle rotating threaded sleeve from the right side in a spiral mode, the rotating directions of external threads on the two push-pull screw rods are opposite, and the two push-pull screw rods are arranged coaxially.

Description

Special tool for valve maintenance

Technical Field

The utility model relates to a special tool for valve maintenance.

Background

The valve on the oil extraction technological process in the oil extraction process is corroded by fluid medium for a long time, the internal structure of the valve body is corroded, the valve is internally leaked or the switch is inflexible, the medium in a pipeline cannot flow, the whole technological system cannot normally run, and the valve needs to be maintained and replaced in time; then a prying lever is used for prying open the other end of the valve; after the flows on two sides are pried, the old valve is taken down from the flow, one end of the new valve is arranged in the flow, the flow of the other end of the new valve is pried by a prying bar, the new valve is arranged on the flow, the flow is adjusted, and the whole oil exploitation system is ensured to be stable in production.

In order to solve the above problems, a patent document with application publication number CN112536763A in the prior art discloses a flange-type connection valve quick maintenance device and a use method thereof, the flange-type connection valve quick maintenance device includes two hoops, each hoop is used for being installed on a pipeline to be butted through a connection valve through a fastening nut, each hoop is provided with two threaded connection blocks, the threaded connection blocks on the two different hoops are arranged oppositely, a screw rod is arranged between the two oppositely arranged threaded connection blocks, a hexagonal rotary block is arranged at the middle position of the screw rod, and threads with opposite rotation directions are arranged on the screw rods on two sides of the rotary block and are respectively in threaded connection with the threaded connection blocks on the two hoops. During the use, wrench turning knob rotates in order to drive the screw rod through the spanner, and then makes two staple bolts keep away from and be close to, and two staple bolts keep away from in order to strut two pipelines, then takes out old valve, puts into with the right position between two pipelines with new valve, and reverse wrench turning knob makes two staple bolts close to in order to draw two pipelines.

Although the swift maintenance device of above-mentioned flange formula connecting valve has saved the manpower, the security has been improved, two staple bolts in the device are when being close to each other, the screw rod can produce the crooked trend of arch or arch under the effect of moment of torsion, the screw rod with threaded connection piece cooperation department can receive partial force this moment, make the screw rod can incline or produce the trend of slope in the screw hole of screw connection piece, make produce between the thread on the screw rod and the thread in the threaded connection piece screw hole and incline to extrude, at the in-process that uses this maintenance device, the thread damage is very fast, the life who overhauls the device is lower.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a special tool for valve maintenance, which aims to solve the technical problem that a screw of a maintenance device in the prior art is subjected to deviation force to cause the damage of screw teeth to be quicker.

In order to achieve the purpose, the technical scheme of the special tool for valve maintenance provided by the utility model is as follows: a kind of valve maintains the specialized tool, including being used for hooping on the left staple bolt and right staple bolt on two corresponding pipelines to change the valve both sides; the special tool for maintaining the valve further comprises a middle push-pull structure, and the middle push-pull structure is used for pushing and pulling the two hoops to drive the two corresponding pipelines to approach in opposite directions and to be away in opposite directions; the middle push-pull structure comprises a left push-pull screw rod, a right push-pull screw rod and a middle rotating threaded sleeve; the left push-pull screw rod is hinged with the left hoop, the right push-pull screw rod is hinged with the right hoop, the left push-pull screw rod penetrates into the left end of the middle rotating threaded sleeve from the left side in a spiral mode, the right push-pull screw rod penetrates into the right end of the middle rotating threaded sleeve from the right side in a spiral mode, the rotating directions of external threads on the two push-pull screw rods are opposite, and the two push-pull screw rods are arranged coaxially.

The beneficial effects are that: the special tool for valve maintenance provided by the utility model is characterized in that two hoop hoops are sleeved on corresponding pipelines at two sides of the valve to be replaced, a push-pull screw rod and a middle rotating threaded sleeve are arranged between the two hoops, one end of each push-pull screw rod is hinged with the corresponding hoop, the other end of each push-pull screw rod is spirally penetrated into the middle rotating threaded sleeve, when the two hoops are close to or far away from each other and the operating personnel rotates the middle rotating threaded sleeve, the stress generated on the middle rotating threaded sleeve can be transferred to the hinged point of the screw rod hinged with the corresponding hoop, and two push-and-pull screw rods are coaxially arranged, the middle rotating screw sleeve is spirally sleeved on the two push-and-pull screw rods, the applied thrust always extends along the axial direction of the middle rotating screw sleeve and the push-and-pull screw rods, the acting force borne by the middle rotating screw sleeve and the spiral of the push-and-pull screw rods is always uniform, the problem of deflection extrusion cannot occur, the damage to screw teeth is effectively reduced, and the service life of a special tool for valve maintenance is prolonged.

The improved structure is characterized in that each push-pull screw is provided with a hinged end, the hinged end is provided with a flat head, two support arms are arranged on each hoop and correspond to the hinged ends of the corresponding push-pull screws, the two support arms are arranged at intervals, the flat head of the hinged end of each push-pull screw extends into the space between the two support arms of the corresponding hoop, two corresponding support arms and the flat heads which are matched are provided with through mounting holes, and hinge shafts penetrate through the mounting holes so as to realize the hinged assembly of the corresponding push-pull screws and the corresponding hoops.

The beneficial effects are that: each push-pull screw rod is hinged with the supporting arm of the corresponding hoop through the flat head, and the connection is convenient.

As a further improvement, the flat head of each push-pull screw rod is of a square structure.

The beneficial effects are that: the flat head with the square structure is simple to manufacture.

As a further improvement, the supporting arm of each hoop is of a rectangular structure.

The beneficial effects are that: compared with other shapes, the rectangular supporting arm reduces the overall size of the special tool for valve maintenance under the condition that each hoop is hinged with the corresponding push-pull screw.

As a further improvement, each hoop is connected with the corresponding two support arms in a welding mode.

The beneficial effects are that: two support arms and corresponding staple bolt welded fastening, connect convenient and intensity enough high.

As a further improvement, the axial directions of the two anchor ears are parallel to the axial direction of the middle rotating screw sleeve.

The beneficial effects are that: the axial direction of the two anchor ears is parallel to the axial direction of the middle rotating threaded sleeve, so that the extending direction of the supporting arm is perpendicular to the middle rotating threaded sleeve, and stress is better transferred.

As a further improvement, a wrench rotating structure is arranged on the middle rotating threaded sleeve and is used for clamping and rotating a wrench.

The beneficial effects are that: the middle rotating threaded sleeve is driven to rotate by clamping and rotating the manual rotating structure through the wrench, so that the operation is convenient.

As a further improvement, the wrench rotation structure is a hexagonal prism structure.

The beneficial effects are that: the wrench rotating structure with the hexagonal prism structure can be matched with most wrenches on the market, and the wrenches can be conveniently matched and purchased.

As a further improvement, the hexagonal prism structure is arranged to project in the radial direction of the intermediate rotary screw sleeve.

The beneficial effects are that: the hexagonal prism structure is arranged in the radial direction of the middle rotating screw sleeve in a protruding mode, so that the clamping of a wrench is facilitated, and the operation is simple.

As a further improvement, the wrench rotation structure and the middle rotation threaded sleeve are integrally or separately arranged, and when the wrench rotation structure and the middle rotation threaded sleeve are separately arranged, the hexagonal prism structure is sleeved on the middle rotation threaded sleeve and welded with the middle rotation threaded sleeve.

The beneficial effects are that: the wrench rotating structure and the middle rotating thread sleeve are arranged in a split mode, so that the shape of the middle rotating thread sleeve is regular, and production is facilitated.

Drawings

FIG. 1 is a schematic structural view of a tool dedicated for valve maintenance according to the present invention;

FIG. 2 is a schematic view of a partial structure of the right hoop shown in FIG. 1;

FIG. 3 is a schematic view of the right push-pull screw of FIG. 1;

fig. 4 is a schematic view of the intermediate rotary insert of fig. 1.

Description of reference numerals:

1. a left hoop; 10. a left bolt mounting hole; 11. a left fastening bolt; 2. a right hoop; 21. a right fastening bolt; 22. an upper half hoop; 220. mounting holes for upper bolts; 23. a lower half hoop; 3. a left push-pull screw; 4. a right push-pull screw; 41. a right flat head; 410. a right through hole; 5. the middle part is rotated to form a threaded sleeve; 50. a wrench rotating structure; 51. the middle of the right half rotates the threaded sleeve; 510. a right thread segment; 52. the left middle part is rotated with a screw sleeve; 6. a right support arm; 61. and a right mounting hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, elements recited by the phrase "comprising an … …" do not exclude the inclusion of such elements in processes or methods.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

The present invention will be described in further detail with reference to examples.

The specific embodiment 1 of the tool special for valve maintenance provided by the utility model is as follows:

two staple bolts among the connecting valve maintenance device among the prior art are when being close to each other, the screw rod can produce the crooked trend of arch or arch under the effect of moment of torsion, the screw rod with threaded connection piece cooperation department can receive partial force this moment, make the screw rod can incline or produce the trend of slope in the screw hole of screw connection piece, make to produce between the thread on the screw rod and the thread in the threaded connection piece screw hole and incline the extrusion, use this in-process of overhauing the device, the thread damage is very fast, the life who overhauls the device is lower. The two hoops are sleeved on the corresponding pipelines on the two sides of the valve to be replaced, the push-pull screw and the middle rotating screw sleeve are arranged between the two hoops, one end of the push-pull screw is hinged with the corresponding hoop, the other end of the push-pull screw is spirally penetrated into the middle rotating screw sleeve, when the two hoops are close to or far away from each other, and an operator rotates the middle rotating screw sleeve, stress generated on the middle rotating screw sleeve can be transmitted to the hinged point where the screw is hinged with the corresponding hoop, the middle rotating screw sleeve is sleeved on the screw, applied thrust always extends along the axial direction of the middle rotating screw sleeve and the push-pull screw rod, acting force borne by the spirals of the middle rotating screw sleeve and the push-pull screw rod is always uniform, the problem of deflection extrusion cannot occur, damage to screw teeth is effectively reduced, and the service life of the special tool for valve maintenance is prolonged.

As shown in fig. 1 to 4, valve maintenance specialized tool includes left staple bolt 1, right staple bolt 2 and middle push-and-pull structure, left staple bolt 1 and right staple bolt 2 are used for hooping respectively and overlap on waiting to change the corresponding pipeline of valve both sides, middle push-and-pull structure is located between two staple bolts, and be connected with two staple bolt transmissions, be used for promoting two staple bolts mutually away from mutually the back of the body and pulling two staple bolts and be close to in opposite directions, two staple bolts drive when keeping away from mutually the back mutually and wait to change the pipeline of valve both sides and keep away from mutually, two staple bolts drive when being close to in opposite directions and wait to change the pipeline of valve both sides and be close to in opposite directions.

The left anchor ear 1 and the right anchor ear 2 have the same structure, and the specific structure of the two anchor ears will be described below by taking the right anchor ear 2 as an example.

The right hoop 2 integrally comprises an upper hoop 22 and a lower hoop 23, arc-shaped grooves on the two halves of hoops are closed to form pipeline mounting holes for corresponding pipelines to pass through, flat plate sections are arranged on the left and right sides of the arc-shaped grooves on the two halves of hoops, upper bolt mounting holes 220 are arranged on the flat plate sections on the two sides of the upper hoop 21, lower bolt mounting holes are arranged on the flat plate sections on the two sides of the lower hoop 23, the upper bolt mounting holes are correspondingly communicated with the two lower bolts, the upper hoop 22 and the lower hoop 23 are fixedly connected in a laminating manner by penetrating the right fastening bolt 21, and then the left hoop 1 is tightly sleeved on the corresponding pipelines.

Specially, be equipped with two right branch arms 6 on the outer peripheral face of first half staple bolt 22's arc wall, each right branch arm 6 is platelike structure, two right branch arms 6 all extend along upper and lower direction, and two right branch arms 6 are arranged about the central axis symmetry interval of arc wall, in order to form the articulated space that supplies right push-and-pull screw 4 to penetrate, the lower extreme of two right branch arms 6 all with first half staple bolt 22 fixed weld, in order to increase joint strength, the upper end of two right branch arms 6 is equipped with right mounting hole 61 relatively, in order to supply right push-and-pull screw 4 articulated.

The middle push-pull structure comprises a left push-pull screw rod 3, a right push-pull screw rod 4 and a middle rotating screw sleeve 5, the middle rotating screw sleeve 5 is integrally of a tube structure and extends along the left-right direction, a wrench rotating structure 50 is arranged on the outer peripheral surface of the middle part of the middle rotating screw sleeve, the wrench rotating structure 50 is specifically of a hexagonal prism structure, the hexagonal prism structure is integrally protruded in the middle of the middle rotating screw sleeve 5 along the radial direction of the middle rotating screw sleeve 5, so that an operator can use a wrench to rotate the prism to drive the middle rotating screw sleeve 5 to rotate, the middle rotating screw sleeve 5 is divided into a left middle rotating screw sleeve 52 and a right middle rotating screw sleeve 51 by taking the hexagonal prism structure as the standard, threads are arranged on the inner peripheral surface of the left middle rotating screw sleeve 52 to form a left thread section for the left push-pull screw rod 3 to be matched and penetrated, threads are also arranged on the inner peripheral surface of the right middle rotating screw sleeve 51 to form a right thread section 510 for the right push-pull screw rod 4 to be matched and penetrated, specifically, the left thread section and the right thread section 510 have opposite thread directions, so that the two push-pull screws move in opposite directions when the intermediate rotary screw sleeve 5 rotates.

The whole rod-shaped structure that is of right push-pull screw 4, it extends along left and right directions, the left end of right push-pull screw 4 is for wearing the end, in order to penetrate the right screw thread section 510 that rotates swivel nut 51 in the middle of the right side left, the right-hand member of right push-pull screw 4 has set firmly right flat head 41, right flat head 41 is square steel sheet structure, be equipped with right through-hole 410 on the flat head 41 of right side, right through-hole 410 corresponds with right mounting hole 61 as the mounting hole and link up, articulate right push-pull screw 4 between two right support arms 6 through wearing the dress bolt, at this moment, the extending direction of the pipeline mounting hole on the right staple bolt 2 is parallel with push-pull screw 4's axial.

The whole shaft-like structure that is of left push-and-pull screw rod 3, it extends along left right direction, and left push-and-pull screw rod 3's right-hand member is for penetrating the end to penetrate right in the middle of the left side and rotate the left screw thread section of swivel nut 52, and left flat head is firmly equipped with left flat head to left push-and-pull screw rod 3's left end, and left flat head is square steel sheet structure, is equipped with left through-hole on the flat head in left side, and left through-hole should link up with left mounting hole on the staple bolt 1 in a left side, articulates left push-and-pull screw rod 3 between two left branch arms through wearing the dress bolt.

In order to avoid the interference between the two push-pull screws that move in the intermediate rotary screw 5 toward each other, the length of the push-pull screws is designed to be less than half the length of the intermediate rotary screw 5.

When the valve is replaced, firstly, a bolt for connecting an old valve with a corresponding pipeline is dismounted, then a left push-pull screw 3 penetrates into a left middle rotating screw sleeve 52 from the left end of a middle rotating screw sleeve 5, a right push-pull screw 4 penetrates into a right middle rotating screw sleeve 51 from the right end of the middle rotating screw sleeve 5, then a left hoop 1 is tightly hooped on the corresponding pipeline on the left side of the old valve through a left fastening bolt 11, a right hoop 2 is tightly hooped on the corresponding pipeline on the right side of the old valve through a right fastening bolt 21, at the moment, one of the two operators lifts the old valve upwards by hand, the other operator rotates a wrench rotating structure 50 through a wrench, so that the left push-pull screw 3 gradually moves leftwards to push the left hoop 1 to move leftwards, and further drive the pipeline on the left side of the old valve to move leftwards, the pipeline that the right push-pull screw rod 4 moves right and drives the valve right side with top pushing right staple bolt 2 moves right, and then make the pipeline of old valve both sides keep away from old valve, at this moment, the operating personnel who draws old valve with the hand-lift takes out old valve from between the pipeline of both sides, put new valve between the pipeline of both sides, guarantee that new valve and both sides pipeline are located same straight line, then the operating personnel antiport spanner that rotates the spanner, so that middle rotation swivel nut 5 reverses, when middle rotation swivel nut 5 reverses, two push-pull screw rods are close to towards spanner rotating-structure 50, and then drive the pipeline of new valve both sides through two staple bolts and be close to new valve gradually in order to closely laminate with new valve, then with the pipeline bolted connection of new valve and both sides, finally, tear down two staple bolts respectively from corresponding pipeline, can accomplish the change work of valve.

The utility model provides a special tool for maintaining a valve, wherein two hoop hoops are sleeved on corresponding pipelines at two sides of the valve to be replaced, a push-pull screw rod and an intermediate rotating threaded sleeve are arranged between the two hoop hoops, one end of the push-pull screw rod is hinged with the corresponding hoop, the other end of the push-pull screw rod is spirally penetrated into the intermediate rotating threaded sleeve, when the two hoop hoops are close to or far away from each other, and an operator rotates the intermediate rotating threaded sleeve, stress generated on the intermediate rotating threaded sleeve can be transmitted to the hinged point where the screw rod is hinged with the corresponding hoop, and the applied thrust can always extend along the axial directions of the intermediate rotating threaded sleeve and the push-pull screw rod by adjusting the rotating stress, so that the acting force borne by the intermediate rotating threaded sleeve and the spiral of the push-pull screw rod is always uniform, the problem of deviation extrusion can not occur, the damage of threads is effectively reduced, and the service life of the special tool for maintaining the valve is prolonged.

The specific embodiment 2 of the special tool for valve maintenance provided by the utility model comprises the following steps:

the difference from embodiment 1 is mainly that in embodiment 1, the wrench rotation structure 50 is provided integrally with the intermediate rotation threaded sleeve 5. In this embodiment, the wrench rotation structure and the middle rotation thread insert are arranged in a split manner, the wrench rotation structure is sleeved on the middle rotation thread insert and is welded and fixed with the middle rotation thread insert, the structure of the middle rotation thread insert is simplified, and the manufacture is simple.

The specific embodiment 3 of the tool special for valve maintenance provided by the utility model is as follows:

the difference from the embodiment 1 is mainly that in the embodiment 1, the wrench rotating rod structure is arranged on the middle rotating screw sleeve in a protruding mode. In this embodiment, six planes are provided on the outer peripheral surface of the middle rotating screw sleeve, and the six planes form a hexagonal prism for being clamped by a wrench.

The specific embodiment of the special tool for valve maintenance provided by the utility model is as follows:

the difference from the embodiment 1 is mainly that in the embodiment 1, the wrench rotation structure 50 is protruded on the intermediate rotation screw sleeve 5. In this embodiment, the left and right sides of spanner revolution mechanic is equipped with ring baffle, and ring baffle sets firmly and rotates the spiral shell in the middle of and sheathes in, and its diameter is greater than spanner revolution mechanic's diameter to avoid the spanner to sideslip in the left and right direction when rotating centre gripping spanner revolution mechanic.

The specific embodiment 5 of the special tool for valve maintenance provided by the utility model is as follows:

the difference from embodiment 1 is mainly that in embodiment 1, the wrench rotation structure 50 is located at the center of the intermediate rotation screw sleeve 5. In this embodiment, the wrench rotation structure is provided offset to the center of the intermediate rotation nut in the left-right direction.

The specific embodiment 6 of the tool special for valve maintenance provided by the utility model is as follows:

the difference between the two support arms and the embodiment 1 is mainly that in the embodiment 1, two support arms are arranged on each hoop, mounting holes are formed in the two support arms, flat heads are arranged on each push-pull screw rod, through holes are formed in the flat heads corresponding to the mounting holes in the support arms, the flat heads are inserted between the two support arms, the flat heads are hinged to the support arms through penetrating bolts, and then the screw rods are hinged to the corresponding hoops. In this embodiment, each hoop is provided with a support arm, the support arm is provided with a mounting hole, the end of each screw is provided with a hinge portion, the hinge portion is of an n-shaped structure, the horizontal section of the hinge portion is perpendicular to the screw and close to the corresponding push-pull screw, and is welded with the push-pull screw, the vertical extension section of the hinge portion is far away from the corresponding push-pull screw and is parallel to the push-pull screw, the vertical extension section is provided with a through hole, and after the support arm is inserted into the vertical extension section, each hoop and the corresponding push-pull screw are hinged together by penetrating and installing a bolt.

Finally, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments without departing from the inventive concept, or some of the technical features may be replaced with equivalents. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A valve maintenance specialized tool, including the left anchor ear (1) and right anchor ear (2) used for hooping on two corresponding pipelines to be changed on both sides of the valve; the valve maintenance special tool is characterized by further comprising a middle push-pull structure, wherein the middle push-pull structure is used for pushing and pulling the two hoops to drive the two corresponding pipelines to approach towards each other and to move away from each other oppositely; the middle push-pull structure comprises a left push-pull screw rod (3), a right push-pull screw rod (4) and a middle rotating threaded sleeve (5); the left push-pull screw (3) is hinged to the left hoop (1), the right push-pull screw (4) is hinged to the right hoop (2), the left push-pull screw (3) penetrates into the left end of the middle rotating threaded sleeve (5) in a spiral mode from the left side, the right push-pull screw (4) penetrates into the right end of the middle rotating threaded sleeve (5) in a spiral mode from the right side, the rotating directions of external threads on the two push-pull screws are opposite, and the two push-pull screws are arranged coaxially.

2. The special tool for repairing the valve according to claim 1, wherein each of the push-pull screws has a hinged end, the hinged end is provided with a flat head, the hinged end of each of the hoops corresponding to the corresponding push-pull screw is provided with two support arms, the two support arms are arranged at intervals, the flat head of the hinged end of each of the push-pull screws extends into the space between the two support arms of the corresponding hoop, the two support arms and the flat head which are correspondingly matched are provided with through mounting holes, and hinge shafts are arranged in the mounting holes in a penetrating manner so as to realize the hinged assembly of the corresponding push-pull screws and the corresponding hoops.

3. The tool as claimed in claim 2, wherein the flat head of each of the push-pull screws is a square.

4. The tool of claim 2, wherein the support arm of each hoop is rectangular.

5. The special tool for repairing a valve as claimed in claim 2, wherein each hoop is welded to the two corresponding support arms.

6. Tool special for valve maintenance according to any one of claims 1-4, characterized in that the axial direction of the two hoops is arranged parallel to the axial direction of the intermediate rotary screw sleeve (5).

7. The tool special for repairing the valve as claimed in any one of claims 1 to 4, wherein a wrench rotation structure (50) is provided on the intermediate rotation screw sleeve (5) for clamping and rotating a wrench.

8. Valve service special tool according to claim 7, characterized in that the wrench turning structure (50) is a hexagonal prism structure.

9. Valve repair kit according to claim 8, characterized in that the hexagonal prism structure is arranged protruding in the radial direction of the intermediate turning insert (5).

10. The tool special for repairing the valve according to claim 8, wherein the wrench rotating structure (50) and the intermediate rotating threaded sleeve (5) are integrally or separately arranged, and when the wrench rotating structure (50) and the intermediate rotating threaded sleeve (5) are separately arranged, the hexagonal prism structure is sleeved on the intermediate rotating threaded sleeve (5) and is welded with the intermediate rotating threaded sleeve (5).

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