CN214197382U - Cipher valve - Google Patents

Abstract

The utility model provides a password valve belongs to valve technical field. It has solved the inconvenient problem of current password valve operation. This password valve includes valve body and trick lock, it stretches out outside the valve body to be equipped with valve rod and valve rod upper end in the valve body, the trick lock includes the lock core, lock body and enable both along the fixed locking mechanical system of circumference, be equipped with password wheel subassembly and locking mechanical system on the lock core and receive password wheel subassembly control unblock, lock body fixed connection valve body upper end, the lock core can rotate for the lock body with axial fixity and the lock core of lock body along the valve rod when locking mechanical system unblock, the terminal surface protrusion is provided with the connecting block under the lock core, the connecting block is located the lock body, the connecting block is equipped with the spread groove, the valve rod upper end stretches into in the spread groove, can drive the valve rod through the cell wall of spread groove and rotate when the lock core rotates. This password valve passes through the transmission between lock core and the valve rod and is connected, possesses more convenient, advantages such as efficiency is higher.

Description

Cipher valve

Technical Field

The utility model belongs to the technical field of the valve, a password valve is related to.

Background

Valves having a locking device on a tap water line, a heating line or a gas line are widely used. The structure of the valve with lock is different, but most of them use mechanical lock body, which is opened by key. Although the method is safe and reliable, when the number of the lock control valves is large and the keys are kept by special persons, the keys used by the valves cannot be used universally, centralized management is not facilitated, and the carrying and the operation of the maintainers are very troublesome.

Therefore, someone is the utility model discloses a password lock valve that application number is CN201320430411.5, which comprises a valve body, can cup joint the lock core on the valve rod extension of valve body upper end, the lock core bottom has the cavity that matches with valve rod extension, the lock core overcoat has lock body and lock core upper end to be equipped with a plurality of password driver plates, annular caulking groove has been seted up to valve body upper end lateral part, the lateral part circumference of lock core lower extreme is equipped with a plurality of locating holes that run through, be equipped with the ball in the locating hole, ball part stretches out the caulking groove that the locating hole is located the one end of lock core inside wall and embedding valve body and offers the recess unanimous with locating hole quantity on the inside wall of lock body lower extreme under the effect of the inside wall of lock body, when password driver plate rotates to the setting value, the lock core can rotate and make locating hole just right with the recess for the lock body.

The coded lock valve solves the problems that a key is various and can not be used universally and centralized management is needed in the existing problems, but still has obvious defects.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a password valve, solved the inconvenient problem of operation.

The purpose of the utility model can be realized by the following technical proposal:

the coded valve comprises a valve body and a coded lock, wherein a valve rod and a valve rod upper end are arranged in the valve body and extend out of the valve body, the coded lock comprises a lock cylinder, a lock body and a locking mechanism capable of enabling the lock cylinder and the lock body to be circumferentially fixed, the lock cylinder is provided with a coded rotating wheel assembly and the locking mechanism is controlled to be unlocked by the coded rotating wheel assembly, and the coded lock is characterized in that the coded lock is fixedly connected with the upper end of the valve body, the lock cylinder and the lock body can rotate relative to the lock body when the locking mechanism is unlocked along the axial fixation of the valve rod and the lock cylinder, a connecting block is arranged on the lower end face of the lock cylinder in a protruding mode, the connecting block is located in the lock body, a connecting groove is formed in the connecting block, the upper end of the valve rod extends into the connecting groove, and the groove wall of the connecting groove can drive the valve rod to rotate when the lock cylinder rotates.

During installation, the lock body is fixedly connected or integrally and fixedly connected to the upper end of the valve body, a valve rod is arranged in the valve body, one part of the upper end of the valve rod extends out of the valve body, and the part of the valve rod extending out of the valve body extends into a connecting groove in the connecting block, so that the upper end of the valve rod is abutted against the groove wall of the connecting groove, and the valve rod is connected with the lock cylinder in a transmission manner. When the code wheel assembly is operated to lock the locking mechanism, the locking mechanism enables the lock cylinder and the lock body to be fixed in the circumferential direction, the valve rod cannot be rotated, the purpose that the flow direction of a liquid medium in the valve body cannot be adjusted is achieved, and locking is achieved; when operation password wheel subassembly made locking mechanical system unblock, the lock core can carry out circumferential direction for the lock body, rotates the lock core and can drive the valve rod and also rotate to the realization is in unlocking state under the condition that need not to take off the trick lock and just can operate the valve rod, reaches the purpose of liquid medium flow direction in the regulating valve body, is connected through the transmission between lock core and the valve rod, makes this password valve operation more convenient, and efficiency is higher.

In foretell password valve, the lock core include lower extreme open-ended enclosing cover and be fixed in the enclosing cover and be massive main part, password wheel subassembly locate main part upper end department and run through on the enclosing cover and be provided with the groove of stepping down that supplies password wheel subassembly part to expose to operate, the lock body upper end inserts in the enclosing cover and the main part is located the lock body upper end inboard, the lock body upper end is along the axial spacing in the enclosing cover.

The outer cover and the main body are connected in a mode that most of the code wheel assembly is hidden and only part of the code wheel assembly is exposed for operation. Meanwhile, the upper end of the lock body is inserted into the outer cover and is axially limited in the outer cover, so that the lock body and the lock cylinder are still fixed along the axial direction of the valve rod after the locking mechanism is unlocked, a user is guaranteed to drive the valve rod to rotate when the lock cylinder is directly rotated, and the convenience in operation is improved.

In the above-mentioned password valve, the opening at the lower end of the outer cover is fixed with the check ring, and the outer side of the lock body is provided with a step which is abutted against the inner edge of the check ring.

When the upper end part of the lock body is inserted into the lower end opening of the outer cover, and the main body is positioned at the inner side of the lock body, the check ring is fixed at the lower end opening of the outer cover, so that the inner edge of the check ring is abutted against the step at the outer side of the lock body.

In the above-mentioned combination valve, the side of the outer cover is provided with a lug.

When the code wheel assembly is operated to unlock the locking mechanism, the lock cylinder can be rotated through the lug lugs arranged on the side part of the outer cover, so that the phenomenon of slipping when the lock cylinder is rotated is prevented.

In the above-mentioned combination valve, the lug is provided with an assembling hole in a penetrating way.

When the code wheel assembly is operated to unlock the locking mechanism, a handle can be arranged on the assembling hole of the lug, and the handle is operated to rotate the valve rod, so that the aim of adjusting the flow direction of the liquid medium in the valve body is fulfilled.

In the above-mentioned cipher valve, the lock body is provided with a positioning hole and a connecting hole in sequence along the axial direction of the valve rod, the lower end orifice of the positioning hole is communicated with the upper end orifice of the connecting hole, the aperture of the positioning hole is larger than that of the connecting hole, the main body is positioned in the positioning hole, the connecting block extends into the connecting hole, the upper end of the valve body is provided with a columnar extension part, and the lower end of the lock body is in threaded connection with the outside of the extension part.

The lock body passes through connecting hole threaded connection outside the extension back, and the upper end of valve rod just is located the connecting hole of lock body naturally, and the main part of lock core is located the locating hole after lock core and lock body assembly are accomplished for the connecting block can directly stretch into in the connecting hole and cooperate with the valve rod, but in order to guarantee that the user directly rotates the lock core behind unblock locking mechanical system and drive the valve rod and rotate.

In the above-mentioned password valve, the cell wall of spread groove include two fitting surfaces that connect respectively in spread groove diapire both sides, the distance between two fitting surfaces reduces along notch to tank bottom direction gradually, can drive the valve rod through two fitting surfaces and rotate when the lock core rotates.

The trick lock assembles with the valve body after independently producing respectively, and its valve rod size is also different to the valve of different specifications, consequently sets up the distance between two fitting surfaces to dwindling gradually along notch to tank bottom direction for two fitting surfaces also can cooperate the transmission with the valve rod of each size, this means the enterprise only need batch production a size the trick lock can, need not to carry out batch production like the valve of different specifications, reduced the production degree of difficulty and manufacturing cost.

In the above-mentioned password valve, the two fitting surfaces are both rectangular, and the bottom wall of the connecting groove is connected with the long sides of the two fitting surfaces.

Use ball valve or gate valve commonly used as the example, valve rod upper end or be flat square or be the square form, consequently set up the diapire that rectangle and spread groove and the long limit of two fitting surfaces through two fitting surfaces and be connected, can make the valve rod homoenergetic of a trick lock and above-mentioned two kinds of shapes cooperate, further reduced the production degree of difficulty and manufacturing cost.

In the above-mentioned cipher valve, the cipher rotary wheel assembly includes a positioning shaft, at least one number wheel sleeved on the positioning shaft, an unlocking plate sleeved on the number wheel and capable of moving along the axial direction of the positioning shaft, and a spring sleeved on the positioning shaft, the number wheel has a notch on a side portion thereof and a first convex tip capable of being embedded into the notch is provided on the unlocking plate, the locking mechanism includes a groove provided on a wall of the positioning hole and a second convex tip provided on the unlocking plate, and an elastic force of the spring acts on the unlocking plate to enable the second convex tip to be embedded into the groove and simultaneously enable the first convex tip to be disengaged from the notch.

When the digit wheel is not at a set value, the notch arranged on the side part of the digit wheel is not opposite to the first convex tip of the unlocking plate, the unlocking plate forces the first convex tip to abut against the non-notch surface on the side part of the digit wheel under the action of the spring, and the second convex tip is embedded into the groove, so that the locking is completed, and the password rotating wheel assembly is arranged on the main body, so that the circumferential fixation is realized between the lock cylinder and the lock body under the state that the locking mechanism is not unlocked, and the valve rod cannot be rotated;

when the digit wheel is shifted to enable the digit wheel to be at a set value, a notch formed in the side portion of the digit wheel and a first convex tip of an unlocking plate are located at opposite positions, the unlocking plate is formed and moves towards the direction close to the notch, when a user rotates the lock cylinder, a second convex tip is extruded by the inner wall of the groove and moves backwards, so that circumferential fixation between the lock cylinder and the lock body is removed, the lock cylinder can rotate relative to the lock body, and the lock cylinder directly drives the valve rod to rotate through the connecting groove to realize adjustment of the flow direction of a liquid medium in the valve body.

Compared with the prior art, this password valve passes through cooperation and position relation such as lock core, lock body and connecting block to the realization is in unlocking state just can operate the valve rod under the condition that need not to take off the password lock, reaches the purpose of liquid medium flow direction in the adjusting valve body, and utilizes the transmission between lock core and the valve rod to be connected, makes this password valve operation more convenient, and efficiency is higher, has solved current password valve and has need to pull down just adjustable valve rod after and make the inconvenient problem of staff's operation.

Drawings

FIG. 1 is a full sectional view of the present combination valve;

FIG. 2 is a schematic view of a combination lock of the present combination valve;

FIG. 3 is a top view of the body and lock body of the present combination valve;

FIG. 4 is a state view of the body and lock body of the present combination valve with the unlocking plate removed;

FIG. 5 is a full sectional view of the lock body of the present combination valve;

FIG. 6 is a full cross-sectional view of an alternate angle of the body of the present combination valve;

FIG. 7 is a full sectional view of the outer cap of the present combination valve;

FIG. 8 is a state diagram of the unlocking plate of the present combination valve;

figure 9 is a schematic view of the combination valve with the handle installed therein.

In the figure, 1, a valve body; 1a, an extension part; 2. a valve stem; 3. a lock cylinder; 3a, an outer cover; 3a1, lugs; 3a2, assembly holes; 3a3, fixed axis; 3a33, screw holes; 3a4, a relief groove; 3b, a main body; 3b1, connecting block; 3b2, vias; 3b11, connecting groove; 3b12, mating surface; 4. a lock body; 4a, positioning holes; 4a1, groove; 4b, connecting holes; 4c, a step; 5. a code wheel assembly; 5a, a positioning shaft; 5b, a digit wheel; 5b1, notch; 5c, unlocking the plate; 5c1, a first nose; 5c2, second lobe; 5d, a spring; 6. a protective cover; 7. a retainer ring; 8. a locking mechanism; 9. a handle.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in figures 1, 2, 3 and 4, fig. 5, fig. 6, fig. 9 shows, the cipher valve, including valve body 1 and trick lock, be equipped with valve rod 2 in the valve body 1 and the valve rod 2 upper end stretches out outside the valve body 1, the trick lock includes lock core 3, lock body 4 and enable both along the locking mechanical system 8 that circumference is fixed, be equipped with password wheel assembly 5 on the lock core 3 and locking mechanical system 8 receives password wheel assembly 5 control unblock, lock body 4 fixed connection is in the valve body 1 upper end, lock core 3 and lock body 4 along the axial fixity of valve rod 2 and lock core 3 can rotate for lock body 4 when locking mechanical system 8 unblock, the terminal surface protrusion is provided with connecting block 3b1 under the lock core 3, connecting block 3b1 is located in the lock body 4, specifically, connecting block 3b1 is located main part 3b lower terminal surface, connecting block 3b1 is equipped with spread groove 3b11, the valve rod 2 upper end stretches into spread groove 3b11, can drive 2 through the cell wall of spread groove 3b11 and rotate when lock core 3 rotates. When the valve rod 2 is installed, a part of the valve rod 2 extending out of the valve body 1 extends into the connecting groove 3b11 in the connecting block 3b1, so that the upper end of the valve rod 2 is abutted against the groove wall of the connecting groove 3b11, and the transmission connection of the valve rod 2 and the lock cylinder 3 is formed. When the code wheel assembly 5 is operated to lock the locking mechanism 8, the locking mechanism 8 enables the lock cylinder 3 and the lock body 4 to be fixed in the circumferential direction, the valve rod 2 cannot be rotated, the purpose of adjusting the flow direction of a liquid medium in the valve body 1 cannot be achieved, and locking is achieved; when operation password wheel subassembly 5 made 8 unblocks of locking mechanical system, lock core 3 can carry out circumferential direction for lock body 4, and rotation lock core 3 can drive valve rod 2 and also rotate to the realization is in unlocking state just can operate valve rod 2 under the condition that need not to take off the trick lock, reaches the purpose of liquid medium flow direction in the regulating valve body 1, is connected through the transmission between lock core 3 and the valve rod 2, makes this password valve operation more convenient, and efficiency is higher.

Further, as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, and fig. 9, the lock cylinder 3 includes an outer cover 3a having an opening at a lower end thereof, and a block-shaped body 3b fixed in the outer cover 3a, specifically, a fixing shaft 3a3 is disposed on an upper end surface of an inner side of the outer cover 3a, a screw hole 3a33 is disposed in the fixing shaft 3a3, a through hole 3b2 is disposed on an upper end surface of the body 3b, stretch into through-hole 3b2 through fixed axle 3a3 in, and adopt the screw to cooperate with screw hole 3a33 and realize the fixed connection of main part 3b and enclosing cover 3a, password wheel subassembly 5 locates main part 3b upper end department and runs through on the enclosing cover 3a and be provided with the groove of stepping down 3a4 that supplies password wheel subassembly 5 part to expose to operate, the lock body 4 upper end inserts in enclosing cover 3a and main part 3b is located the lock body 4 upper end inboard, lock body 4 upper end is along the axial spacing in enclosing cover 3 a. The connection mode of enclosing cover 3a and main part 3b makes password swivel subassembly 5 mostly all hidden, only local naked in order to operate, specifically, still be provided with visor 6 on enclosing cover 3a, visor 6 passes through hinged joint and on enclosing cover 3a, visor 6 can avoid password swivel subassembly 5 to receive external factor influence and thus damage when need not to operate password swivel subassembly 5, and need open visor 6 when needs operate password swivel subassembly 5, simultaneously, the upper end of lock body 4 inserts in enclosing cover 3a and along axial spacing in enclosing cover 3a, make lock body 4 and lock core 3 still be along the axial of valve rod 2 fixed mutually after 8 unblocks of locking mechanical system, thereby guarantee that the user just can drive valve rod 2 and rotate when directly rotating lock core 3, the convenience of operation has been improved.

As shown in fig. 1, 2, 3, 4, 5, 6, and 9, a retainer 7 is fixed to an opening at the lower end of the outer cover 3a, and a step 4c abutting against the inner edge of the retainer 7 is provided on the outer side of the lock body 4. When the upper end part of the lock body 4 is inserted into the lower end opening of the outer cover 3a, and the main body 3b is positioned at the inner side of the lock body 4, the check ring 7 is fixed at the lower end opening of the outer cover 3a, so that the inner edge of the check ring 7 abuts against the step 4c on the outer side of the lock body 4, and due to the arrangement of the check ring 7 at the lower end opening of the outer cover 3a, the lock cylinder 3 can rotate relative to the lock body 4 under the condition that the lock body 4 cannot be pulled out, so that the aim of adjusting the flow direction of a liquid medium in the valve body 1 by rotating the lock cylinder is fulfilled.

Further, as shown in fig. 1, 2, 6 and 9, the side of the outer cover 3a is provided with a lug 3a 1. When the code wheel assembly 5 is operated to unlock the locking mechanism 8, the key cylinder 3 can be rotated by the lugs 3a1 provided at the side of the outer cover 3a, thereby preventing a slip phenomenon from occurring when the key cylinder 3 is rotated. Meanwhile, the lug 3a1 is also provided with a fitting hole 3a 2. When the code wheel assembly 5 is operated to unlock the locking mechanism 8, the handle 9 is also installed on the assembling hole 3a2 of the lug 3a1, and the handle 9 is operated to rotate the valve rod 2, thereby achieving the purpose of adjusting the flowing direction of the liquid medium in the valve body 1.

As shown in fig. 1, 2, 3, 4, 5, 6, and 9, the lock body 4 is sequentially provided with a positioning hole 4a and a connecting hole 4b along the axial direction of the valve rod 2, a lower end opening of the positioning hole 4a is communicated with an upper end opening of the connecting hole 4b, the diameter of the positioning hole 4a is larger than that of the connecting hole 4b, the main body 3b is located in the positioning hole 4a, the connecting block 3b1 extends into the connecting hole 4b, the upper end of the valve body 1 is provided with a columnar extension portion 1a, and the lower end of the lock body 4 is screwed outside the extension portion 1 a. After the lock body 4 is in threaded connection with the outside of the extension part 1a through the connecting hole 4b, the upper end of the valve rod 2 is naturally located in the connecting hole 4b of the lock body 4, and the lock cylinder 3 and the lock body 4 are assembled to complete the main body 3b of the lock cylinder 3 and located in the positioning hole 4a, so that the connecting block 3b1 can directly stretch into the connecting hole 4b to be matched with the valve rod 2, and a user can directly rotate the lock cylinder 3 to drive the valve rod 2 to rotate after unlocking the locking mechanism 8.

Further, as shown in fig. 2, 6 and 9, the groove wall of the connecting groove 3b11 includes two matching surfaces 3b12 respectively connected to two sides of the bottom wall of the connecting groove 3b11, and the distance between the two matching surfaces 3b12 is gradually reduced along the direction from the groove opening to the groove bottom, so that when the lock cylinder 3 rotates, the valve rod 2 can be driven to rotate by the two matching surfaces 3b 12. Trick lock and valve body 1 are assembled after independently producing respectively, its valve rod 2 size is also different to the valve of different specifications, consequently set up the distance between two fitting surfaces 3b12 to dwindle gradually along notch to tank bottom direction, make two fitting surfaces 3b12 also can cooperate the transmission with the valve rod 2 of each size, this means the enterprise only need batch production a size the trick lock can, need not to carry out batch production like the valve of different specifications, the production degree of difficulty and manufacturing cost have been reduced.

As shown in fig. 2, 6 and 9, the two engagement surfaces 3b12 are rectangular, and the bottom wall of the connecting groove 3b11 is connected to the long sides of the two engagement surfaces 3b 12. Take ball valve or gate valve commonly used as an example, valve rod 2 upper end is either flat square or is the tetragonal form, consequently sets up two fitting surfaces 3b12 into the rectangle and the diapire of connecting groove 3b11 is connected with the long limit of two fitting surfaces 3b12, can make a trick lock and the valve rod 2 homoenergetic of above-mentioned two kinds of shapes cooperate, has further reduced the production degree of difficulty and manufacturing cost.

Further, as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 8, and fig. 9, the combination wheel assembly 5 includes a positioning shaft 5a, at least one number wheel 5b fitted over the positioning shaft 5a, an unlocking plate 5c fitted over the number wheel 5b and capable of moving in the axial direction of the positioning shaft 5a, and a spring 5d fitted over the positioning shaft 5a, a recess 5b1 is provided at a side portion of the number wheel 5b, a first protrusion 5c1 capable of being inserted into the recess 5b1 is provided on the unlocking plate 5c, the locking mechanism 8 includes a groove 4a1 provided on a hole wall of the positioning hole 4a, and a second protrusion 5c2 provided on the unlocking plate 5c, and an elastic force of the spring 5d acts on the unlocking plate 5c to insert the second protrusion 5c2 into the groove 4a1 and simultaneously disengage the first protrusion 5c1 from the recess 5b 1. When the number wheel 5b is not at the set value, the notch 5b1 arranged on the side part of the number wheel 5b and the first convex tip 5c1 of the unlocking plate 5c are not opposite to each other, the unlocking plate 5c forces the first convex tip 5c1 to abut against the non-notch 5b1 surface on the side part of the number wheel 5b under the action of the spring 5d, and the second convex tip 5c2 is embedded into the groove 4a1, so that the locking is completed, and because the password rotating wheel assembly 5 is arranged on the main body 3b, under the state that the locking mechanism 8 is not unlocked, the circumferential fixation is realized between the lock cylinder 3 and the lock body 4, so that the valve rod 2 cannot be rotated; when the digit wheel 5b is shifted to enable the digit wheel 5b to be at a set value, the notch 5b1 arranged on the side part of the digit wheel 5b is opposite to the first convex tip 5c1 of the unlocking plate 5c, so that the unlocking plate 5c moves towards the direction close to the notch 5b1, when a user rotates the lock cylinder 3, the second convex tip 5c2 is extruded by the inner wall of the groove 4a1 and moves backwards, therefore, the circumferential fixation between the lock cylinder 3 and the lock body 4 is released, the lock cylinder 3 can rotate relative to the lock body 4, and the lock cylinder 3 directly drives the valve rod 2 to rotate through the connecting groove 3b11 to realize the adjustment of the flowing direction of the liquid medium in the valve body 1.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (9)

1. The coded valve comprises a valve body (1) and a coded lock, wherein a valve rod (2) and a locking mechanism (8) are arranged in the valve body (1) and the upper end of the valve rod (2) extends out of the valve body (1), the coded lock comprises a lock cylinder (3), a lock body (4) and a locking mechanism (8) which can be fixed along the circumferential direction, the lock cylinder (3) is provided with a coded rotating wheel assembly (5) and the locking mechanism (8) is controlled to be unlocked by the coded rotating wheel assembly (5), the coded valve is characterized in that the lock body (4) is fixedly connected to the upper end of the valve body (1), the lock cylinder (3) and the lock body (4) can rotate relative to the lock body (4) along the axial direction of the valve rod (2) and the lock cylinder (3) when the locking mechanism (8) is unlocked, a connecting block (3b1) is arranged on the lower end surface of the lock cylinder (3) in a protruding mode, the connecting block (3b1) is positioned in the lock body (4), the connecting block (3b1) is provided with a connecting groove (3b11), the upper end of the valve rod (2) extends into the connecting groove (3b11), and when the lock cylinder (3) rotates, the valve rod (2) can be driven to rotate by the groove wall of the connecting groove (3b 11).

2. The combination valve according to claim 1, wherein the lock cylinder (3) comprises an outer cover (3a) with an opening at the lower end and a block-shaped main body (3b) fixed in the outer cover (3a), the combination wheel assembly (5) is arranged at the upper end of the main body (3b) and a abdicating groove (3a4) for the combination wheel assembly (5) to be partially exposed for operation is arranged on the outer cover (3a) in a penetrating manner, the upper end of the lock body (4) is inserted into the outer cover (3a) and the main body (3b) is positioned on the inner side of the upper end of the lock body (4), and the upper end of the lock body (4) is axially limited in the outer cover (3 a).

3. The password valve according to claim 2, wherein a retainer ring (7) is fixed at the opening at the lower end of the outer cover (3a), and a step (4c) which is abutted against the inner edge of the retainer ring (7) is arranged on the outer side of the lock body (4).

4. The valve according to claim 3, wherein the outer cap (3a) is provided with lugs (3a1) on its side.

5. The combination valve of claim 4, wherein the lug (3a1) is provided with a fitting hole (3a2) therethrough.

6. The combination valve according to claim 2, 3, 4 or 5, wherein the lock body (4) is sequentially provided with a positioning hole (4a) and a connecting hole (4b) along the axial direction of the valve rod (2), the lower end orifice of the positioning hole (4a) is communicated with the upper end orifice of the connecting hole (4b), the aperture of the positioning hole (4a) is larger than that of the connecting hole (4b), the main body (3b) is positioned in the positioning hole (4a) and the connecting block (3b1) extends into the connecting hole (4b), the upper end of the valve body (1) is provided with a columnar extension part (1a), and the lower end of the lock body (4) is in threaded connection with the outside of the extension part (1 a).

7. The combination valve of claim 6, wherein the groove wall of the connecting groove (3b11) comprises two mating surfaces (3b12) respectively connected to two sides of the bottom wall of the connecting groove (3b11), and the distance between the two mating surfaces (3b12) gradually decreases from the groove opening to the groove bottom, so that the valve rod (2) can be driven to rotate by the two mating surfaces (3b12) when the lock cylinder (3) rotates.

8. The cryptographic valve of claim 7, wherein the mating surfaces (3b12) are rectangular and the bottom wall of the connecting slot (3b11) is connected to the long sides of the mating surfaces (3b 12).

9. The combination valve according to claim 1, wherein the combination wheel assembly (5) comprises a positioning shaft (5a), at least one number wheel (5b) sleeved on the positioning shaft (5a), an unlocking plate (5c) sleeved on the number wheel (5b) and capable of moving along the axial direction of the positioning shaft (5a), and a spring (5d) sleeved on the positioning shaft (5a), a notch (5b1) is arranged at the side part of the number wheel (5b) and a first convex tip (5c1) capable of being embedded into the notch (5b1) is arranged on the unlocking plate (5c), the locking mechanism (8) comprises a groove (4a1) arranged on the hole wall of the positioning hole (4a) and a second convex tip (5c2) arranged on the unlocking plate (5c), the elastic force of the spring (5d) acts on the unlocking plate (5c) to enable the second convex tip (5c2) to be embedded into the groove (4a1) and simultaneously enable the first convex tip (5c1) to be disengaged from the notch (5b 1).

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