CN111251259A

CN111251259A - Multifunctional valve wrench

Info

Publication number: CN111251259A
Application number: CN202010087048.6A
Authority: CN
Inventors: 焦栩; 焦小炯
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-11
Filing date: 2020-02-11
Publication date: 2020-06-09
Anticipated expiration: 2040-02-11
Also published as: CN111251259B

Abstract

The invention relates to the technical field of hardware tools, in particular to a multifunctional valve wrench, which comprises a front wrench main body and a rear wrench main body, wherein the front wrench main body comprises a front handle, a front working head, a sliding block, a saw blade and an adjusting screw, and the front working head is fixed at the upper end of the front handle. The pipe fitting cutting tool is reasonable and compact in structure and high in working efficiency, the sliding block and the saw blade can be positioned by arranging the adjusting screw, the pipe fitting cutting tool can be used for cutting a heat insulation layer of a pipeline and can also be used for cutting a heat insulation layer of the pipeline, the front wrench main body and the rear wrench main body are arranged, when the pressure gauge is disassembled and assembled, the rear wrench main body is used for fixing the fixing nut corresponding to the pressure gauge, the front wrench main body is used for disassembling and assembling a joint of the pressure gauge, the pressure gauge is prevented from being damaged when a single wrench is used for disassembling and assembling the pressure gauge, the working efficiency can be improved, the rear wrench main body is detachably inserted into the sliding groove through the upper sliding rail, the front wrench main body and.

Description

Multifunctional valve wrench

Technical Field

The invention relates to the technical field of hardware tools, in particular to a multifunctional valve wrench.

Background

In the pipeline is patrolled and examined and the maintenance process, maintainer's basic operation when the installation of manometer and change, under the general condition, the dismouting of manometer all uses two monkey wrenches to accomplish, monkey wrench is when the dismouting manometer, need adjust monkey wrench's opening width, take trouble hard, work efficiency is low, need two monkey wrenches during dismouting manometer simultaneously, to maintainer, it is inconvenient to patrol and examine the in-process and carry, when patrolling and examining the in-process simultaneously and meet other trouble, if switching valve with need unpack apart pipeline heat preservation inspection pipeline, two monkey wrenches also can not in time solve the trouble as the instrument.

Disclosure of Invention

The invention provides a multifunctional valve wrench, overcomes the defects of the prior art, and can effectively solve the problems of inconvenience in carrying and low working efficiency of the conventional maintenance tool.

The technical scheme of the invention is realized by the following measures: a multifunctional valve wrench comprises a front wrench main body and a rear wrench main body, wherein the front wrench main body comprises a front handle, a front working head, a sliding block, a saw blade and an adjusting screw, the front working head is fixed at the upper end of the front handle, a front disassembly and assembly groove with a through opening towards the left and a front and back is arranged in the middle of the front working head, a sliding groove with a backward opening is arranged at the upper side of the rear end of the front working head, a limiting groove with a backward opening and a downward lower part extending to the lower side of the rear part of the front handle is arranged in the middle of the front handle corresponding to the position of the sliding groove, a sliding block capable of moving up and down is arranged at the inner side of the upper part of the limiting groove, the saw blade with a lower end capable of being positioned below the front handle is fixedly arranged at the front side of the lower part of the sliding block, a threaded hole with a front and back, the rear wrench main body is arranged on the rear side of the front handle and comprises a rear handle, a rear working head and an upper sliding rail, the rear working head is fixed to the upper end of the rear handle, a rear disassembling groove which is open leftward and is communicated with the front and the rear is arranged in the middle of the rear working head corresponding to the position of the front disassembling groove, the upper sliding rail matched with the sliding groove is fixed to the front side of the upper portion of the rear working head, and the rear wrench main body can be detachably inserted into the sliding groove through the upper sliding rail.

The following is further optimization or/and improvement of the technical scheme of the invention:

the front disassembly and assembly groove can comprise a first groove, a second groove and a third groove which are sequentially reduced and communicated from left to right in the vertical direction, a sliding groove with an opening extending backwards and downwards to the lower side of the front handle is arranged on the upper side of the rear end of the front working head corresponding to the position of the second groove, and the rear disassembly and assembly groove comprises a fourth groove, a fifth groove and a sixth groove which are sequentially reduced and communicated from left to right in the vertical direction and are communicated from top to bottom.

The rear handle comprises a vice, a left sliding rail and a right sliding rail, the lower side of the rear working head corresponding to the rear side of the right part of the front handle is fixed to the upper end of the right forceps handle of the vice, the upper front side and the lower front side of the upper part of the rear working head are both fixed with an upper sliding rail matched with a sliding groove, the front side of the left forceps handle of the vice and the front side of the right forceps handle of the vice are respectively fixed with the left sliding rail and the right sliding rail, and the rear wrench main body is connected with the left sliding rail and the right sliding rail in a detachable and inserting mode in the sliding groove through the upper sliding.

The rear wrench main body can further comprise a positioning block and a compression spring, the section of the sliding groove is in a T shape which is narrow at the back and wide at the front, the section of the upper sliding rail is in a T shape matched with the sliding groove, the section of the right sliding rail is in an L shape matched with the right sliding groove, the section of the left sliding rail is in an inverse L shape matched with the left sliding groove, the rear side of the left working head corresponding to the left sliding groove is provided with a limiting groove with an upward opening and a U shape, the front side of the rear working head corresponding to the position of the limiting groove is fixed with the positioning block clamped in the limiting groove, and the compression spring is fixedly connected between the right side of the middle part of the left vice handle and the left side of the middle part of the right vice handle corresponding to the position above the.

The front working head and the rear working head can be of a cuboid structure, the left side and the upper side of the front working head corresponding to the position of the first groove are in smooth transition, the upper side of the left part of the front working head is in smooth transition with the front side of the left part, the left side and the lower side of the front working head are in smooth transition, the front side of the front working head corresponding to the position of the second groove and the position of the third groove is respectively provided with a first clamping groove and a second clamping groove with a forward opening, the left side and the upper side of the rear working head corresponding to the position of the fourth groove are in smooth transition, the left side and the left rear side of the rear working head are in smooth transition, and the rear side of the rear working head corresponding to the position of the fifth groove and the sixth groove is respectively provided.

A rear fixing block can be fixed on the lower side of the right part of the rear working head corresponding to the right position of the upper end of the right vice handle, a rear thread counter bore with a downward opening is arranged on the lower side of the middle part of the rear fixing block, a rear dismounting nut is arranged in the rear thread counter bore and comprises a rear screw rod and a rear stud which are sequentially fixed together from top to bottom, the outer side of the upper part of the rear screw rod is connected and installed in the rear thread counter bore through threads, a rear limiting hole with the upper part extending upwards to the upper end of the rear screw rod is arranged in the center of the lower end of the rear stud, a plum blossom screwdriver with, the upper end of the plum blossom screwdriver corresponding to the upper end of the rear screw rod is fixed with a rear limiting block of which the lower side is contacted with the upper end of the rear screw rod, the upper side of the middle part of the rear working head is provided with a first thread counter bore which is the same as the rear thread counter bore, and the center of the bottom of the first thread counter bore is provided with a rear positioning groove of which the opening is upward and which is matched with the rear limiting block.

The front wrench main body can also comprise a front dismounting nut, a front fixing block is fixed on the lower side of the right part of the front working head corresponding to the right position of the upper end of the front handle, a front thread counter bore with a downward opening is arranged on the lower side of the middle part of the front fixing block, a front dismounting nut is arranged in the front thread counter bore and comprises a front screw rod and a front stud which are sequentially fixed together from top to bottom, the outer side of the upper part of the front screw rod is connected and installed in the front thread counter bore through threads, a front limiting hole with the upper part extending upwards to the upper end of the front screw rod is arranged in the center of the lower end of the front stud, a, the upper end of a flat screwdriver corresponding to the upper end of the front screw is fixed with a front limiting block of which the lower side is contacted with the upper end of the front screw, the upper side of the middle part of the front working head is provided with a second thread counter bore which is the same as the front thread counter bore, and the center of the bottom of the second thread counter bore is provided with a front positioning groove of which the opening is upward and which is matched with the front limiting block.

The pipe fitting cutting tool is reasonable and compact in structure and high in working efficiency, the sliding block and the saw blade can be positioned by arranging the adjusting screw, the pipe fitting cutting tool can be used for cutting a heat insulation layer of a pipeline and can also be used for cutting a heat insulation layer of the pipeline, the front wrench main body and the rear wrench main body are arranged, when the pressure gauge is disassembled and assembled, the rear wrench main body is used for fixing the fixing nut corresponding to the pressure gauge, the front wrench main body is used for disassembling and assembling a joint of the pressure gauge, the pressure gauge is prevented from being damaged when a single wrench is used for disassembling and assembling the pressure gauge, the working efficiency can be improved, the rear wrench main body is detachably inserted into the sliding groove through the upper sliding rail, the front wrench main body and.

Drawings

Fig. 1 is a schematic front view of the preferred embodiment of the present invention.

Fig. 2 is a schematic top view of the structure of fig. 1.

Fig. 3 is a rear view of the front wrench body shown in fig. 1.

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 3.

FIG. 5 is a schematic cross-sectional view at B-B in FIG. 3.

Fig. 6 is a front view of the rear wrench body of fig. 1.

Fig. 7 is a rear view of the structure of fig. 6.

Figure 8 is a front view of the vise of figure 6 in use.

The codes in the figures are respectively: 1 is a front handle, 2 is a front working head, 3 is a sliding block, 4 is a saw blade, 5 is an adjusting screw, 6 is a rear positioning groove, 7 is a right forceps handle, 8 is a left forceps handle, 9 is a rear working head, 10 is an upper sliding rail, 11 is a left sliding rail, 12 is a right sliding rail, 13 is a positioning block, 14 is a baffle, 15 is a compression spring, 16 is a front screw, 17 is a front stud, 18 is a flat screwdriver, 19 is a rear screw, 20 is a rear stud, 21 is a plum blossom screwdriver, 22 is a front fixing block, 23 is a rear fixing block, 24 is a first groove, 25 is a second groove, 26 is a third groove, 27 is a sliding groove, 28 is a limiting groove, 29 is a long-strip-shaped hole, 30 is a fourth groove, 31 is a fifth groove, 32 is a sixth groove, 33 is a limiting groove, 34 is a first clamping groove, 35 is a second clamping groove, 36 is a third clamping groove, 37 is a fourth clamping groove, 38 is a second threaded hinge shaft, 39 is a second threaded counter bore, 40 is a front locating groove and 41 is a first threaded counterbore.

Detailed Description

The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.

In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.

The invention is further described with reference to the following examples and figures:

as shown in attached figures 1, 2, 3, 4, 5, 6, 7 and 8, the multifunctional valve wrench comprises a front wrench main body and a rear wrench main body, wherein the front wrench main body comprises a front handle 1, a front working head 2, a sliding block 3, a saw blade 4 and an adjusting screw 5, the upper end of the front handle 1 is fixed with the front working head 2, the middle part of the front working head 2 is provided with a front dismounting groove with a left opening and a front and rear through, the upper side of the rear end of the front working head 2 is provided with a sliding groove 27 with a backward opening, the middle part of the front handle 1 corresponding to the position of the sliding groove 27 is provided with a limiting groove 28 with a backward opening and a lower part extending downwards to the lower side of the rear part of the front handle 1, the inner side of the upper part of the limiting groove 28 is provided with the sliding block 3 capable of moving up and down, the front side of the lower part of the sliding block 3 is fixedly provided with the saw blade 4, adjusting screw 5 with the rear end penetrating through long strip-shaped hole 29 and fixedly installed in the threaded hole through threaded connection is installed on the front side of front handle 1, a rear wrench main body is arranged on the rear side of front handle 1 and comprises a rear handle, a rear working head 9 and an upper sliding rail 10, the upper end of the rear handle is fixed with the rear working head 9, a rear disassembling and assembling groove with an opening communicated with the front and the rear is arranged in the middle of the rear working head 9 corresponding to the position of the front disassembling and assembling groove, the upper sliding rail 10 matched with sliding groove 27 is fixed on the front side of the upper portion of the rear working head 9, and the rear wrench main body can be detachably inserted into the sliding groove 27.

According to the demand, the cross-section of preceding handle 1 is the rectangle, and preceding dismouting recess matches with the joint phase-match of manometer, and the fixation nut phase-match that back dismouting recess and manometer correspond. In the using process, the slide block 3 and the saw blade 4 can be positioned by arranging the adjusting screw 5, when the saw blade 4 is used, the adjusting screw 5 is unscrewed, the slide block 3 and the saw blade 4 can slide up and down along the limit groove 28, after the use is finished, the saw blade 4 is retracted into the limit groove 28, the saw blade 4 is fixed in the limit groove 28 by the adjusting screw 5, the saw blade 4 can be used for cutting pipe fittings and also can be used for cutting a heat insulation layer of a pipeline, rusted threads can be cleaned, by arranging the front wrench main body and the rear wrench main body, when the pressure gauge is disassembled and assembled, the rear wrench main body is used for fixing a fixing nut corresponding to the pressure gauge, the front wrench main body is used for disassembling and assembling a joint of the pressure gauge, the pressure gauge is prevented from being damaged when the pressure gauge is disassembled and assembled by a single wrench, the working efficiency can be improved, the rear wrench, can install into the integral type, portable and use preceding spanner main part and back spanner main part.

The multifunctional valve wrench can be further optimized or/and improved according to actual needs:

as shown in the accompanying

drawings

1, 2, 3, 4, 5, 6, 7 and 8, the front dismounting groove comprises a first groove 24, a second groove 25 and a third groove 26 which are sequentially reduced in vertical distance from left to right and are communicated with each other, a sliding groove 27 which is provided with a backward opening and extends downwards to the lower side of the front handle 1 is arranged on the upper side of the rear end of the front working head 2 corresponding to the position of the second groove 25, and the rear dismounting groove comprises a fourth groove 30, a fifth groove 31 and a sixth groove 32 which are sequentially reduced in vertical distance from left to right and are communicated with each other.

According to the demand, first recess 24 is the same with fourth recess 30, second recess 25 is the same with fifth recess 3, third recess 26 is the same with sixth recess 32, first recess 24 inside wall, second recess 25 inside wall, third recess 26 inside wall, fourth recess 30 inside wall, fifth recess 31 inside wall and sixth recess 32 inside wall all have anti-skidding decorative pattern, it is fixed with baffle 14 to correspond the preceding handle 1 lower extreme of spacing recess 28 lower part position, baffle 14 rear side flushes with the recess 27 front side that slides mutually, be equipped with the clearance between baffle 14 front side and the 4 rear sides of saw blade, the ascending width is less than spacing recess 28 ascending width about controlling about rectangular hole 29, the upper end of saw blade 4 and the 3 lower parts of slider pass through screw fixed mounting and be in the same place. In the use, during dismouting manometer, the sixth recess 32 that utilizes back spanner main part is fixed to the valve that the manometer corresponds, and the third recess 26 that utilizes preceding spanner main part carries out the dismouting to the joint of manometer, causes the damage to the manometer when avoiding single spanner dismouting manometer, can utilize second recess 25 and third recess 26 to dismantle the bolt of other specifications simultaneously.

As shown in the attached

drawings

1, 2, 6, 7 and 8, the rear handle comprises a vice, a left slide rail 11 and a right slide rail 12, the lower side of the rear working head 9 corresponding to the rear side of the right part of the front handle 1 is fixed with the upper end of the right clamp handle 7 of the vice, the upper front side and the lower front side of the upper part of the rear working head 9 are respectively fixed with an upper slide rail 10 matched with the sliding groove 27, the front side of the left clamp handle 8 of the vice and the front side of the right clamp handle 7 of the vice are respectively fixed with the left slide rail 11 and the right slide rail 12, and the rear wrench main body is detachably inserted into the sliding groove 27 through the upper slide rail 10, the left slide rail 11 and the right slide rail 12.

Vises are known in the art on demand. In the use, through setting up the vice, can be used for cutting off the steel wire or unscrew the nut, through setting up slide rail 10, left slide rail 11 and right slide rail 12, can be in the same place the reliable installation of preceding spanner main part and back spanner main part.

As shown in fig. 1, 2, 3, 4, 5, 6, and 8, the rear wrench body further includes a positioning block 13 and a compression spring 15, the cross section of the sliding groove 27 is a T-shape with a narrow back and a wide front, the cross section of the upper sliding rail 10 is a T-shape matched with the sliding groove 27, the cross section of the right sliding rail 12 is an L-shape matched with the right of the sliding groove 27, the cross section of the left sliding rail 11 is an inverted L-shape matched with the left of the sliding groove 27, the rear side of the left portion of the front working head 2 corresponding to the left of the sliding groove 27 is provided with a U-shaped limiting groove 33 with an upward opening, the front side of the rear working head 9 corresponding to the position of the limiting groove 33 is fixed with the positioning block 13 engaged in the limiting groove 33, and the compression spring 15 is fixedly connected between the right side of the middle portion of the left jaw handle 8 of the vise corresponding to the position above 38.

In the use, through setting up T shape recess 27 that slides, go up slide rail 10, the left slide rail 11 of L shape and the right slide rail 12 of anti-L shape, left side slide rail 11 and right slide rail 12 can block when leaning on tightly in recess 27 that slides, the processing of being convenient for, can reduce the cost of manufacture, through setting up locating piece 13, can be quick with preceding spanner main part and back spanner main part installation together, the dismouting is simple, and high durability and convenient carrying is realized, through setting up compression spring 15, the contact is compacter when preceding spanner main part and back spanner main part are pegged graft together, the accident drops when avoiding carrying, the vice can open automatically when using simultaneously, and convenient operation.

As shown in fig. 1, 2, 3, 4, 5, 6, 7, and 8, the front working head 2 and the rear working head 9 are both rectangular structures, the left side and the upper side of the front working head 2 corresponding to the position of the first groove 24 are smoothly transitioned, the upper side and the front side of the left portion of the front working head 2 are smoothly transitioned, the left side and the lower side of the front working head 2 are smoothly transitioned, the front side of the front working head 2 corresponding to the positions of the second groove 25 and the third groove 26 are respectively provided with a first clamping groove 34 and a second clamping groove 35 with a forward opening, the left side and the upper side of the rear working head 9 corresponding to the position of the fourth groove 30 are smoothly transitioned, the upper side and the rear side of the left portion of the rear working head 9 are circularly transitioned, the left side and the lower side of the rear working head 9 corresponding to the positions of the fifth groove 31 and the sixth groove 32 are respectively provided with a third clamping groove 36 and.

In the use process, through the arrangement, when a pressure gauge or a switch valve is disassembled and assembled (the operating handle of the valve is clamped into the first groove 24 or the fourth groove 30), the front working head 2 and the rear working head 9 can be smoothly clamped with a pressure gauge fastening nut or a valve operating handle, the operation of the invention is smoother, the working efficiency is improved, the right part of the front working head 2 and the right part of the rear working head 9 can be used for opening a thread cover of a large iron barrel and can also be used as a hammer, and the thread cover of a small iron barrel can be conveniently opened through smooth transition of the left side and the upper side of the front working head 2 and smooth transition of the left side and the upper side of the rear working head 9.

As shown in fig. 2, 6, 7 and 8, a rear fixing block 23 is fixed on the lower side of the right part of the rear working head 9 corresponding to the right position of the upper end of the right jaw handle 7 of the vice, a rear screw counter bore with a downward opening is arranged on the lower side of the middle part of the rear fixing block 23, a rear dismounting nut is arranged in the rear screw counter bore and comprises a rear screw rod 19 and a rear stud 20 which are sequentially fixed together from top to bottom, the outer side of the upper part of the rear screw rod 19 is installed in the rear screw counter bore through threaded connection, a rear limiting hole with an upper part extending upwards to the upper end of the rear screw rod 19 is arranged in the center of the lower end of the rear stud 20, a plum blossom screwdriver 21 with a lower end positioned below the rear stud 20 is installed in the rear limiting hole, a rear limiting block with a lower side contacting with the upper end of the rear screw rod 19 is fixed on the upper end of the, the center of the bottom of the first threaded counter bore 41 is provided with a rear positioning groove 6 which is opened upwards and matched with the rear limiting block.

According to the requirement, the rear stud 20 is vertically arranged in a cylindrical shape, the diameter of the outer side of the rear stud 20 is larger than that of the outer side of the rear screw rod 19, the section of the rear limiting block is rectangular, a rear boss is arranged on the upper side of the middle of the rear working head 9, and the first threaded counter bore 41 is located in the center of the upper side of the rear boss. In the use, with back dismouting nut and box opener 21 follow back screw thread counter bore in pull down and install in first screw thread counter bore 41, can make back spanner main part carry out the dismouting to cross screw, also can use after the position is changed with plain end bottle opener 18, the function is various and easy operation, can be used for dismantling the fixed screw of pipeline heat preservation shell.

As shown in fig. 1, 2, 3 and 4, the front wrench body further comprises a front nut for dismounting, a front fixing block 22 is fixed on the lower side of the right portion of the front working head 2 corresponding to the right position of the upper end of the front handle 1, a front threaded counter bore with a downward opening is arranged on the lower side of the middle portion of the front fixing block 22, a front nut for dismounting is arranged in the front threaded counter bore, the front nut for dismounting comprises a front screw 16 and a front stud 17 which are sequentially fixed together from top to bottom, the outer side of the upper portion of the front screw 16 is installed in the front threaded counter bore through threaded connection, a front limiting hole with an upper portion extending upwards to the upper end of the front screw 16 is arranged in the center of the lower end of the front stud 17, a flat screwdriver 18 with a lower end located below the front stud 17 is installed in the front limiting hole, a front limiting block with a lower side contacting with the upper end of the front screw 16 is fixed on the upper end of the flat, the center of the bottom of the second threaded counter bore 39 is provided with a front positioning groove 40 which is opened upwards and matched with the front limiting block.

According to the requirement, the front stud 17 is vertically arranged in a cylindrical shape, the diameter of the outer side of the front stud 17 is larger than that of the outer side of the front screw 16, the section of the front limiting block is rectangular, a front boss is arranged on the upper side of the middle of the front working head 2, and the second threaded counter bore 39 is located in the center of the upper side of the front boss. In the use, with preceding dismouting nut and flat screwdriver 18 from preceding screw thread counter bore in pull down and install in second screw thread counter bore 39, can make preceding spanner main part carry out the dismouting to the screw of style of calligraphy, the function is various and easy operation, can be used for dismantling the fixed screw of pipeline heat preservation shell.

The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.

Claims

1. A multifunctional valve wrench is characterized by comprising a front wrench main body and a rear wrench main body, wherein the front wrench main body comprises a front handle, a front working head, a sliding block, a saw blade and an adjusting screw, the upper end of the front handle is fixedly provided with the front working head, the middle part of the front working head is provided with a front dismounting groove with a left opening and a front and back through hole, the upper side of the rear end of the front working head is provided with a sliding groove with a backward opening, the middle part of the front handle corresponding to the position of the sliding groove is provided with a limiting groove with a backward opening and a lower part extending downwards to the lower side of the rear part of the front handle, the inner side of the upper part of the limiting groove is provided with the sliding block capable of moving up and down, the front side of the lower part of the sliding block is fixedly provided with the saw blade with a lower end capable of being positioned below the front handle, the upper part of the sliding block is, the rear wrench main body is arranged on the rear side of the front handle and comprises a rear handle, a rear working head and an upper sliding rail, the rear working head is fixed to the upper end of the rear handle, a rear disassembling groove which is open leftward and is communicated with the front and the rear is arranged in the middle of the rear working head corresponding to the position of the front disassembling groove, the upper sliding rail matched with the sliding groove is fixed to the front side of the upper portion of the rear working head, and the rear wrench main body can be detachably inserted into the sliding groove through the upper sliding rail.

2. The multifunctional valve wrench as claimed in claim 1, wherein the front disassembling/assembling recess includes a first recess, a second recess and a third recess which are sequentially reduced in vertical distance from left to right in the up-down direction and are communicated with each other, a sliding recess having a backward opening and extending downward to the lower side of the front handle is provided on the upper side of the rear end of the front working head corresponding to the second recess, and the rear disassembling/assembling recess includes a fourth recess, a fifth recess and a sixth recess which are sequentially reduced in vertical distance from left to right in the up-down direction and are communicated with each other.

3. The multi-functional valve wrench as claimed in claim 2, wherein the rear handle includes a vise, a left slide rail and a right slide rail, a lower side of the rear working head corresponding to a rear side of the right portion of the front handle is fixed to an upper end of the right handle of the vise, an upper slide rail matching the sliding groove is fixed to each of a front side of an upper portion and a front side of a lower portion of the rear working head, a left slide rail and a right slide rail are respectively fixed to a front side of the left handle of the vise and a front side of the right handle of the vise, and the rear wrench body is detachably inserted into the sliding groove through the upper slide rail, the left slide rail and the right slide rail.

4. The multi-functional valve wrench as claimed in claim 3, wherein the rear wrench body further includes a positioning block and a compression spring, the sliding groove has a cross-section in a shape of a T with a narrow rear portion and a wide front portion, the upper slide rail has a cross-section in a shape of a T matching the sliding groove, the right slide rail has a cross-section in a shape of an L matching the right portion of the sliding groove, the left slide rail has a cross-section in a shape of an inverted L matching the left portion of the sliding groove, the rear side of the left portion of the front working head corresponding to the left position of the sliding groove is provided with a U-shaped limiting groove with an upward opening, the positioning block engaged in the limiting groove is fixed to the front side of the rear working head corresponding to the position of the limiting groove, and the compression spring is fixedly connected between the right side of the middle portion of the left handle of the.

5. The multifunctional valve wrench as claimed in claim 2, 3 or 4, wherein the front working head and the rear working head are both rectangular structures, the left side and the upper side of the front working head corresponding to the first groove are smoothly transitioned, the left side and the front side of the front working head are smoothly transitioned, the left side and the lower side of the front working head are smoothly transitioned, the front side of the front working head corresponding to the second groove and the third groove is respectively provided with a first clamping groove and a second clamping groove with a forward opening, the left side and the upper side of the rear working head corresponding to the fourth groove are smoothly transitioned, the left side and the left rear side of the rear working head are circularly transitioned, the left side and the lower side of the rear working head are smoothly transitioned, and the rear side of the rear working head corresponding to the fifth groove and the sixth groove is respectively provided with a third clamping groove and a fourth clamping groove with a backward opening.

6. The multi-functional valve wrench as claimed in claim 3 or 4, wherein a rear fixing block is fixed to the lower right portion of the rear working head corresponding to the right position of the upper end of the right jaw shank of the vise, a rear screw counter bore with a downward opening is formed in the lower middle portion of the rear fixing block, a rear nut is disposed in the rear screw counter bore and includes a rear screw and a rear stud which are sequentially fixed together from top to bottom, the outer side of the upper portion of the rear screw is threadedly mounted in the rear screw counter bore, a rear limiting hole is formed in the center of the lower end of the rear stud, the upper portion of the rear limiting hole extends upward to the upper end of the rear screw, a torx screwdriver is mounted in the rear limiting, the upper end of the plum blossom screwdriver corresponding to the upper end of the rear screw rod is fixed with a rear limiting block of which the lower side is contacted with the upper end of the rear screw rod, the upper side of the middle part of the rear working head is provided with a first thread counter bore which is the same as the rear thread counter bore, and the center of the bottom of the first thread counter bore is provided with a rear positioning groove of which the opening is upward and which is matched with the rear limiting block.

7. The multi-functional valve wrench as claimed in claim 5, wherein a rear fixing block is fixed to a lower right portion of the rear working head corresponding to a right position of an upper end of the right jaw of the vise, a rear screw counter bore having a downward opening is formed in a lower middle portion of the rear fixing block, a rear nut is disposed in the rear screw counter bore, the rear nut includes a rear screw and a rear stud fixed together in sequence from top to bottom, an outer side of an upper portion of the rear screw is threadedly coupled and mounted in the rear screw counter bore, a rear limiting hole having an upper portion extending upward to an upper end of the rear screw is formed in a center of a lower end of the rear stud, a torx screwdriver having a lower end located below the rear, the upper end of the plum blossom screwdriver corresponding to the upper end of the rear screw rod is fixed with a rear limiting block of which the lower side is contacted with the upper end of the rear screw rod, the upper side of the middle part of the rear working head is provided with a first thread counter bore which is the same as the rear thread counter bore, and the center of the bottom of the first thread counter bore is provided with a rear positioning groove of which the opening is upward and which is matched with the rear limiting block.

8. The multifunctional valve wrench as claimed in claim 1, 2, 3, 4 or 7, wherein the front wrench body further comprises a front nut for dismounting, a front fixing block is fixed on the lower side of the right portion of the front working head corresponding to the right position of the upper end of the front handle, a front threaded counter bore with a downward opening is arranged on the lower side of the middle portion of the front fixing block, a front nut for dismounting is arranged in the front threaded counter bore, the front nut for dismounting comprises a front screw rod and a front stud bolt which are sequentially fixed together from top to bottom, the outer side of the upper portion of the front screw rod is installed in the front threaded counter bore through threaded connection, a front limiting hole with an upper portion extending upwards to the upper end of the front screw rod is arranged in the center of the lower end of the front stud bolt, a flat screwdriver with a lower end located below the front stud bolt is installed in the front limiting hole, a front limiting block with a lower side contacting with the upper end of the front, the center of the bottom of the second threaded counter bore is provided with a front positioning groove which is provided with an upward opening and is matched with the front limiting block.

9. The multifunctional valve wrench as claimed in claim 5, wherein the front wrench body further comprises a front nut for dismounting, a front fixing block is fixed to the lower side of the right portion of the front working head corresponding to the right position of the upper end of the front handle, a front threaded counter bore with a downward opening is formed in the lower side of the middle portion of the front fixing block, a front nut for dismounting is disposed in the front threaded counter bore, the front nut for dismounting comprises a front screw and a front stud which are sequentially fixed together from top to bottom, the outer side of the upper portion of the front screw is connected and mounted in the front threaded counter bore by threads, a front limiting hole with an upper portion extending upward to the upper end of the front screw is disposed in the center of the lower end of the front stud, a flat screwdriver with a lower end located below the front stud is mounted in the front limiting hole, a front limiting block with a lower side contacting with the upper end of the front screw is fixed to the, the center of the bottom of the second threaded counter bore is provided with a front positioning groove which is provided with an upward opening and is matched with the front limiting block.

10. The multifunctional valve wrench as claimed in claim 6, wherein the front wrench body further comprises a front nut for dismounting, a front fixing block is fixed to the lower side of the right portion of the front working head corresponding to the right position of the upper end of the front handle, a front threaded counter bore with a downward opening is formed in the lower side of the middle portion of the front fixing block, a front nut for dismounting is disposed in the front threaded counter bore, the front nut for dismounting comprises a front screw and a front stud which are sequentially fixed together from top to bottom, the outer side of the upper portion of the front screw is connected and mounted in the front threaded counter bore by threads, a front limiting hole with an upper portion extending upward to the upper end of the front screw is disposed in the center of the lower end of the front stud, a flat screwdriver with a lower end located below the front stud is mounted in the front limiting hole, a front limiting block with a lower side contacting with the upper end of the front screw is fixed to the, the center of the bottom of the second threaded counter bore is provided with a front positioning groove which is provided with an upward opening and is matched with the front limiting block.