CN1213282C - Water meter connecting apparatus - Google Patents

Abstract

Water meter installation unit 1 consistes of water stop bolt 2 and check valve 3 which connects to opening M1 and M2 of water meter M respectively, and base 4 which joints water stop bolt and check valve on the axis of the opening M1 and M2 of the water meter M at intervals wider than whole length of water meter. By fixing water stop bolt and check valve on the base, the opening M1 and M2 of the water meter M are able to against the opening 6 of the water stop bolt and the opening 31 of the check valve 3 with an extendable pipe 29, which is able to insert and withdraw freely through opening 6 or 31 thereof in water-tight state via a round base end 28 in interior 27, to be put either on the end of opening 6 of the water stop bolt 2 or the opening 31 of the check valve 3. According to the insert and withdraw of the extendable pipe, water meter can be easily amounted between water stop bolt and check valve.

Description

Water meter connection device

technical field

The present invention relates to a water meter connecting device, by which a water meter installed in a water pipe of each indoor plant etc. can be easily connected and detached.

Background technique

Usually, in the water pipe, the water meter is constructed in such a way that a cock valve and a check valve are respectively connected to the cock valve port (inlet) and the check valve port (outlet) of the water meter. When replacing the water meter, the new water meter must be replaced. It is placed between the upstream side and the downstream side and is connected to the mains water pipe through its connection between the stopcock and the one-way valve.

However, in many cases, after the water meter is removed from between the cock and check valve, the centers of the water meter connection portions on the cock and check valve are not aligned with each other. In addition, generally speaking, since the installation space of the water meter in the indoor complete equipment is very narrow, it is difficult to connect the inlet and outlet of the water meter to the corresponding connection ports of the cock valve and the one-way valve, which brings about a problem that the connection between It is very troublesome and time-consuming to replace or newly install all the water meters in the indoor complete sets of equipment of various households.

Contents of the invention

The present invention was developed to address and other problems. The present invention comprises a device comprising: a cock valve and a one-way valve respectively connected to the inlet and outlet of the water meter, and a base for connecting the corresponding cock valve and the one-way valve along the inlet and outlet of the water meter The connection axis between the outlets is arranged and separated from each other at an interval greater than the total length of the water meter. By fixing the cock valve and the one-way valve on the base, the inlet and outlet of the water meter placed between the cock valve and the one-way valve can be connected to the cock respectively. The outlet of the valve matches the inlet of the one-way valve, and a flexible tube is provided on either one of the outlet of the plug valve and the inlet of the one-way valve, and a ring that can slide in the inner opening part in a watertight state is embedded in the flexible tube Shaped base, so that the flexible pipe can advance and retreat, so, through the advance and retreat of the flexible pipe, the water meter can be easily placed and connected between the cock valve and the one-way valve.

Generally speaking, since the present invention includes a device 1, it includes: a plug valve 2 and a one-way valve 3, which are respectively connected to the inlet M1 and the outlet M2 of the water meter M; and a base 4, which is used to connect the corresponding The cock valve 2 and the one-way valve 3 are arranged and separated along the connection axis between the inlet M1 and the outlet M2 of the water meter M, and the separation distance is greater than the total length of the water meter M arranged between them. 2 and the one-way valve 3 are fixed on the base 4, that is, the outlet 6 of the cock valve 2 and the inlet 31 of the one-way valve 3 can be easily positioned at the inlet M1 and the outlet M2 of the water meter M, and because the cock 2, the one-way valve The directional valve 3 and the water meter M can be compactly assembled together, so the whole device 1 can be made relatively compact.

In addition, on the side of the outlet 6 of the plug valve 2 and the side of the inlet 31 of the one-way valve 3, circular side surfaces 25 and 35 are formed on the seat connection parts 10 and 34, and a circular collar part 26 is also formed. and 36. Since the supporting parts 40, 40a and the fixing parts 41, 41a are arranged on the base 4, the supporting parts are used to cooperate with the circular collar parts 26, 36 to assemble the lower semicircular parts of the base connecting parts 10, 34, and the fixing parts For cooperating with the circular collar portion 26, 36 to fit the upper semicircular portion of the base connection portion 10, 34 and fixed on the support portion by the fastener BT, so that the corresponding base connection portion 10, 34 can be fixed The position is press-fitted and held between the support portion 40, 40a and the fixing piece 41, 41a without any slippage. In addition, since the corresponding base connecting parts 10, 34 can be temporarily fixed when the fastener BT is loose, the inlet 5 of the plug valve 2 and the outlet 32 of the one-way valve 3 can be respectively directed to the connection of the water pipe. mouth.

In addition, since the flexible pipe 29 is provided on any one of the outlet 6 of the cock valve 2 and the inlet 31 of the check valve 3, the flexible pipe is embedded with a circular ring capable of sliding in the inner opening portion 27 in a watertight state. base 28, so that the flexible pipe can advance and retreat, therefore, the water meter M can be arranged between the cock valve 2 and the one-way valve 3 through the contraction of the flexible pipe 29 without causing any obstruction, and only the flexible pipe 29 Pull out and connect the inlet M1 and outlet M2 of the water meter M to the outlet 6 of the plug valve 2 and the inlet 31 of the check valve 3, and the water meter M can be easily installed between the plug valve 2 and the check valve 3.

In addition, since a polygonal side portion 30 whose outer dimension is smaller than the outer diameter of the annular base portion 26 is continuously formed on the end side from the annular base portion 28 of the flexible pipe 29, and one of the support portion 40 and the fixing member 41 Or both front end faces 42,43 are shaped to match the polygonal side portion 30, therefore, the annular base 28 will contact the inner side of the front end face 43 of the fixing member 41, to prevent the annular base from being trapped in the flexible tube 29. When pulled out to the limit, it will be disengaged. At the same time, since the flexible pipe 29 will not rotate around the axis, when the joint part U that is used to connect the flexible pipe 29 with the water meter M is tightened or unscrewed, it is not necessary to use pliers, etc. The tool holds the flexible tube 29 against rotation, so that the cumbersome action associated with using such a tool can be omitted.

By forming the supporting parts 40, 40a to fix the base connecting part 10 of the plug valve 2 or the base connecting part 34 of the one-way valve 3 connected to the flexible pipe 29, and by fixing the front end faces 42, 42, 43 is shaped to match the polygonal side 30 to prevent the flexible tube from coming off or turning. In this way, compared with the case where the fixing device on the base connection part 10 or the base connection part 34 connected to the flexible tube 29 is separately provided to prevent disengagement and rotation, the total length of the base 4 can be reduced, so that the device 1 can be made more compact.

As described above, according to the present invention, the operation for installing the water meter M and its subsidiary operations and the operation for removing the water meter M can be easily performed, so that work efficiency can be significantly improved.

Since the cock 2 has a configuration in which the body 9 and the base connecting portion 10 are rotatably connected to each other, the operating rods 23, 24 and the handle 24a protruding from the body 9 can be easily directed in a predetermined direction.

In addition, because at a connection end 11, there is an annular section 12 arranged on the inner circumference of the opening end, in addition, a conical section 13 is also provided, and the diameter of the conical section starts from the annular section 12 and continuously decreases inwards. , an annular groove 16 is provided in the circumference of the ring segment 12, and a C-shaped circlip 15 whose diameter can be expanded and reduced is placed in the groove so that it can sink into the groove. The opening end side of 11 obliquely cuts the edge of the opening end edge of the groove to form an inclined portion 17 . In addition, a conical segment 20, an annular segment 21 and an annular groove 22 are provided on the other connecting end 18 to match the connecting end 11, and the width of the corresponding annular groove 22 is set such that the retaining ring 15 The inner diameter side portion 15 a protruding from the annular groove 22 of the connecting end portion 11 contacts the groove with its inner side in such a state that no external force is applied to the C-shaped circlip 15 . In this way, the body 9 and the base connecting portion 10 can be connected to each other by one contact action. In addition, after the body 9 and the base connecting portion 10 are connected to each other, if an attempt is made to disengage the body 9 and the base connecting portion 10 from each other, since no external force is applied in the direction of expanding the C-shaped circlip 15, both The connection between the two parts 9 and 10 will not be separated. In addition, since the connecting device between the body 9 and the base connecting part 10 is not exposed to the outside of the plug valve 2, the retaining ring 15 will not be misplaced during the connection operation. remove.

In addition, according to the connection device described above, since the connection end 11 of the body 9 and the connection end 18 of the base connection part 10 are connected in a manner of overlapping with each other, it is the same as connecting the connection with a joint nut, a connection clamp, etc. Compared with the case where the body 9 is connected to the base connecting portion 10, the overall length can be shortened, so that the device 1 can be made more compact.

Since the flanges 45, 45a rest on the base mounting surface GL, the anchor bolt insertion holes 46, 46a protrude above the base mounting surface GL, and the screw insertion holes 47 for fixing the base to the base connection surface GL by screws and 47a is located in each flange 45, 45a, so when installing the base 4, any of the following methods can be selected: use cement mortar to fix the flanges 45 and 45a on the base mounting surface GL, or use anchor bolts or screws to The flanges 45 and 45a are fixed to the base mounting surface GL. The base 4 can be installed in various installation positions of the base 4 under various conditions, so that the installation operation can be simplified, thereby having a remarkable practical effect.

Description of drawings

Fig. 1 is a longitudinal sectional view of the water meter connecting device.

Figure 2 is a top view of the base.

Fig. 3 is an enlarged sectional view taken along line A-A in Fig. 1 .

Fig. 4 is an enlarged sectional view taken along line B-B in Fig. 1 .

Fig. 5 is an enlarged sectional view of the plug valve.

Figure 6 is an enlarged cross-sectional view of the connection state between the plug valve body and the base connection part, where (a) is a view of the complete connection state between the body and the base connection part, and (b) is the connection between the body and the base after the connection is completed The view when parts are pulled in a direction away from each other.

Detailed ways

A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is a longitudinal sectional view of a water meter connecting device 1 according to the present invention.

The device 1 includes a plug valve 2 and a one-way valve 3, which are respectively connected to the inlet M1 and the outlet M2 of the water meter M, and a base 4, which is used to connect the corresponding plug valve 2 and the one-way valve 3 along the water meter M. The connection axis between the inlet M1 and the outlet M2 is arranged and separated from each other at an interval greater than the total length of the water meter M (the distance between the inlet M1 and the outlet M2).

The stopcock 2 is a corner ball valve with an auxiliary cock, in which the flow path from the inlet 5 to the outlet 6 is formed such that the direction of the inlet 5 is perpendicular to the direction of the outlet 6, thereby providing a pen that communicates with the inlet 5 The straight path, the cock body 9 is formed in such a way that the spherical valve bodies serving as the auxiliary cock 7 and the main cock 8 are continuously arranged in the body 9 in order from the inlet side inward along this straight path, and the body 9 They are connected to the base connecting part 10 in a mutually rotatable state, and the base connecting part communicates with the outlet 6 in the form of an elbow.

The connecting end 11 of the body 9 is provided with an annular section 12 at the open end, and a conical surface 13 is formed continuously from the corresponding annular section 12, and the diameter of the conical surface gradually decreases toward the depth side. A reduced-diameter annular segment 14 is formed continuously from the smallest diameter portion of the corresponding conical segment 13 .

An annular groove 16 is located on the circumferential surface of the ring segment 12, and the width of the annular groove is equal to the cross-sectional diameter of the C-shaped circlip 15, so that the C-shaped circlip 15 whose diameter can expand and shrink can sink into the In the groove, at the same time, an inclined section 17 is formed by cutting the edge of the opening portion edge of the corresponding groove 16 on the opening end side of the connecting end portion 11 .

The connection end portion 18 of the base connection portion 10 is provided with a reduced-diameter ring segment 19, a conical segment 20, a ring segment 21 and an annular groove 22 on the outer periphery, which correspond to the body connection end portion 11 respectively. Correspondingly, the reduced-diameter annular segment 19 has an O-ring P fitted in an O-ring groove formed on its circumference.

The width of the groove 22 is set such that the inner diameter side 15a (half the cross-sectional portion of the semicircle of the retaining ring 15) protruding from the groove 16 of the connecting end 11 of the body 9 on the retaining ring 15 will The inner side thereof contacts the groove 22 in such a state that no external force is applied to the C-shaped circlip 15 .

In addition, when the connecting end 18 of the base connecting part 10 is inserted into the connecting end 11 of the body 9, the inner diameter side 15a protruding from the groove 16 of the corresponding connecting end 11 on the retaining ring 15 will follow the base The conical section 20 of the connecting end 18 of the connecting part 10 slides gradually so as to be finally squeezed into the groove 16 of the connecting end 11 of the body 9, wherein the retaining ring 15 is continuously extended from the conical section 20 by the circular ring section 21 expands so as to fit into the groove 16, and when the grooves 16 and 22 are aligned with each other, the retaining ring 15 will shrink to its original state without external force being applied thereto. Thereafter, the retaining ring 15 is accommodated such that the inner diameter side portion 15a of the retaining ring 15 contacts the groove 22 with its inner side, so that the engagement of the body 9 and the base connecting portion 10 is ensured by the retaining ring 15 while allowing relative rotation of the two. In addition, the body and base connection part will communicate with the spherical valve body used as the auxiliary cock 7 and the main cock 8, and the direction of extension of the operating rods 23 and 24, which protrude out of the body 9, can be freely set , for opening and closing the valve body.

The inclined section 17 provided in the groove 16 of the body 9 has the following function.

That is, in the state where the body 9 and the base connecting portion 10 are connected to each other as described above, when the body 9 and the base connecting portion 10 are pulled in a direction to separate from each other, if there is no If the inclined portion 17 is formed, the corresponding angular portion X on the edge of the opening portion of the two grooves 16 and 22 (due to the formation of an inclined portion 17, only one angular portion is shown on the groove 16) will produce a The force that the retaining ring 15 is pushed along the vertical opposite direction, so that the diameter of the retaining ring 15 is enlarged, so that the retaining ring 15 is completely embedded in the groove 16 of the body 19, so it is believed that the body 9 can be connected with the base at this time. The connection part 10 is separated. However, if the inclined portion 17 is provided on the groove 16, the reaction force on the outer diameter side portion 15b of the retaining ring 15 will point to the inner side of the groove 22 of the base connecting portion 10 along the direction perpendicular to the inclined plane. The direction of pushing on the inclined portion 17, as shown in Fig. 6 (b), like this, the diameter of retaining ring 15 can not expand, therefore retaining ring 15 can keep being embedded in groove 16, as a result, once body 9 The main body 9 and the base connecting part 10 in the plug valve 2 can be prevented from being disassembled by being connected and combined with each other with the base connecting part 10 .

The outlet 6 side (portion orthogonal to the body 9) of the base connecting portion 10 of the plug valve 2 has a side surface 25 formed in a circular ring shape, and a circular collar portion 26 protrudes from the side surface.

A straight flexible pipe 29 is installed on the outlet 6 of the base connection part 10, and a circular base 28 is embedded on the flexible pipe, which can slide in the inner opening part 27 in a watertight state, so that the flexible pipe can advance and retreat.

In the flexible tube 29, the annular base portion 28 is provided with O-ring grooves recessed into its peripheral surface, each O-ring groove housing an O-ring P, respectively. On the distal end side of the annular base 28, a polygonal side portion 30 (in the illustrated example, in contact with the annular base 28 from the inside) smaller than the outer diameter of the annular base 28 is continuously formed with a predetermined length. , a flange is provided on the end face of the end opening portion of the flexible pipe 29, with a seal S on the flange. Meanwhile, a joint member U such as a joint nut etc. is provided on the end of the flexible pipe 29 for connecting the inlet M1 of the water meter M.

Furthermore, although only one handle 24a is connected to the operating rod 24 of the main cock 8 in the illustrated example, a further handle (not shown) is suitably connected to the operating rod 23 of the auxiliary cock 7 .

In addition, the plug valve 2 may not be a ball valve having the aforementioned structure, but a plug valve having other structures. In addition, the base connecting portion 10 of the elbow type has been described above, but it may also be of the straight type. The connecting ends 11 and 18 on the body 9 and the base connecting part 10 can also have a mutually inverted structure, that is to say, such a structure can be adopted that the connecting end of the body 9 is inserted into the connecting end 18 of the base connecting part 10 middle.

The one-way valve 3 is shaped as a corner so that the flow path in the inlet 31 is perpendicular to the flow path in the outlet 32, and a valve body 33 for preventing water from flowing backward from the downstream side to the upstream side is integrally provided In the flow path communicating with the inlet 31, a base connecting portion 34 is thereby formed. In addition, a flange with a seal S is provided on the end surface of the opening portion of the inlet 31, and a joint U such as a joint nut or the like is disposed on the inlet 31 for connecting the outlet M2 of the water meter M.

Furthermore, the seat connection portion 34 provided on the inlet 31 side of the check valve 3 has a side surface 35 formed in a circular ring shape, and a circular collar portion 36 protrudes from the side surface.

In addition, the one-way valve 3 described above has an outlet 32 side that is corner-shaped and thus bent like an elbow. However, a check valve of the type in which the flow path between the inlet 31 and the outlet 32 is formed straight may also be employed.

Furthermore, in this embodiment, a flexible tube 29 is provided on the outlet 6 of the stopcock 2 . However, the flexible tube 29 can also be connected to the inlet 31 of the non-return valve 3 . In this case, the outlet 6 of the stopcock 2 protrudes from the circular collar portion 26, and a joint member U is connected to the end thereof.

The base 4 comprises a long parallelepiped middle part 37 in the left-right direction, the inclined plane sections 38 and 38a are continuously upwardly inclined from the left and right sides of the corresponding middle part 37, and the vertical walls 39 and 39a are formed from the corresponding inclined plane sections 38 The uppermost part of and 38a protrudes upright.

Support portions 40 and 40a are recessed into the vertical walls 39 and 39a for cooperating with the circular collar portions 26 and 36 of the plug valve 2 and the check valve 3 to fit the seat connection portions 10 and 34. The lower half circle part. Roughly semi-arc-shaped fixtures 41 and 41a are provided on the respective support portions 40 and 40a, and cooperate with the circular collar portions 26 and 36 to fit the upper semi-circular portions of the base connecting portions 10 and 34, and pass through A fastener BT consisting of a hexagon socket head bolt is fixed to the support portions 40 and 40a.

The plug valve 2 and the one-way valve 3 are built in such a way that the outlet 6 (flexible pipe 29) of the plug valve 2 and the one-way valve The inlet 31 of 3 is arranged on the same axis.

In addition, a thin rubber sheet R is attached to the fitting surfaces between the support portions 40 and 40a and the fixing pieces 41 and 41a and between the fixing pieces 41 and 41a and the base connecting portions 10 and 34, and the attached thin rubber sheet R The function is to act as an anti-rotation member for the base connecting parts 10 and 34 after the fastener BT is fully tightened.

In addition, a polygonal opening 44 corresponding to the polygonal side portion 30 is formed on one or both of the front end faces 42 and 43 of the support portion 40 and the fixing member 41 (in the illustrated example only the front end of the fixing member 41 is formed). surface 43), used to fix the base connecting portion 10 of the plug valve 2 or the base connecting portion 34 of the one-way valve 3 connected to the flexible pipe 29 (used to fix the base connecting portion 10 in the illustrated example).

Flanges 45 and 45a abutting against the base mounting surface GL made of concrete are provided on the lower left and right sides of the base 4, respectively, and at the same time, corresponding flanges 45 and 45a are provided with anchors protruding above the base mounting surface GL. Bolt insertion holes 46 and 46a are also provided with screw insertion holes 47 and 47a, and the insertion holes are used to fix the base 4 on the base installation surface GL.

Next, the operation of the water meter connection device 1 will be described.

When fixing the base 4 on the base installation surface GL, a fixing device can be selected according to installation conditions.

For example, in the case of replacing the existing water meter M, since the water pipe has already been installed, the operating space is narrow, so it is inconvenient to embed the new anchor bolt into the base installation surface GL. Therefore, holes can be drilled on the base mounting surface corresponding to the screw insertion holes 47 and 47a... holes, and screws (not shown) are screwed into the screw insertion holes 47 and 47a to fix the base 4 on the base mounting surface GL.

In the case of the newly installed base 4, because it is before the water pipe is installed, the operating space is larger than the previous case, so that it is easy to embed the anchor bolts in the base mounting surface GL, and the anchor bolts correspond to the anchor bolts in the flanges 45 and 45a. After the bolt insertion holes 46 and 46a are embedded in the base installation surface GL, bolts (not shown) protruding from the base installation surface GL will pass through the anchor bolt insertion holes 46 and 46a and be tightened by nuts, thereby fixing the base 4 On the base mounting surface GL.

In addition to the aforementioned method of fixing the base 4, the flanges 45 and 45a may also be fixed on the base mounting surface GL by cement mortar.

After the base 4 is fixed on the base mounting surface GL by any one of the aforementioned three methods, when the plug valve 2, the one-way valve 3 and the water meter M are installed in the water pipe (not shown), first, The base connection parts 10 and 34 of the plug valve 2 and the one-way valve 3 and the lower semicircle parts of the circular collar parts 26 and 36 are respectively placed on the support parts 40 and 40a, while the upper semicircle parts of the collar parts The ring portion is covered by the fixing pieces 41 and 41a, and the fasteners BF are loosely screwed in to temporarily fix these components in a state where the base connecting portions 10 and 34 are loosely placed on the support portions 40 and 40a and fixed Between pieces 41 and 41a.

In the temporarily fixed state, since the circular collar portions 26 and 36 are loosely seated between the support portions 40 and 40a and the fixing pieces 41 and 41a, the base connecting portions 10 and 34 can be pivoted about their axes. However, their movement in the axial direction is limited by the corresponding circular collar portions 26 and 36, and the plug valve 2 and the check valve 3 are thus arranged on the left and right sides of the base 4.

In this state, by properly turning the cock 2 and the one-way valve 3 respectively, the inlet 5 of the cock 2 and the outlet 32 of the one-way valve 3 can point to a specific direction to match the corresponding connection port of the water pipe , and then temporarily fixed by a joint nut (not shown) for connection.

In addition, in the plug valve 2, the body 9 is rotatable relative to the base connecting portion 10 so that the operating rods 23, 24 and the handle 24a are extended in a predetermined direction. Thereafter, the joint nuts and fasteners BT for temporarily connecting the cock valve 2 and the one-way valve 3 with the water pipe are fully tightened.

In addition, when the plug valve 2 and the one-way valve 3 used are not elbow type but straight head type, in order to connect the plug valve and the one-way valve to the water pipe, it is necessary to connect the inlet 5 of the plug valve 2 and the one-way valve to the water pipe. An elbow is respectively connected to the outlet 32 of the valve 3 . Like this, after temporarily fixing these parts, need to rotate temporarily fixed plug valve 2 and check valve 3, so that the elbow connected to the inlet 5 side of plug valve 2 and the outlet 32 side of check valve 3 Match the corresponding connection port of the water pipe.

Next, the water meter M is placed and connected between the stopcock 2 and the one-way valve 3 fixed on the base 4 .

In this connection operation, a water meter M is placed between the cock valve 2 and the one-way valve 3, and the flexible pipe 29 is pulled out to a suitable length to connect the inlets of the flexible pipe 29 and the one-way valve 3 The joint part U on the 31 is screwed on the inlet M1 and M2 of the water meter M.

Because the annular base portion 28 is formed to be larger than the outer dimension of the polygonal side portion 30 on the flexible tube 29 that is pulled out, the inner side of the front end face 43 of the annular base portion 28 can be contacted by the polygonal mouth 44. enclosed side) to prevent disengagement of the donut-shaped base.

When being screwed into the joint member U, the seat connecting portions 10 and 34 of the plug valve 2 and the check valve 3 cannot rotate because they are seated between the support portions 40 and 40a and the fixing members 41 and 41a. And because the polygonal side portion 30 is made to conform to the front end face 43 of the fixing piece 41, the flexible tube 29 cannot rotate. Therefore, the joint member U can be tightened only with a wrench or the like, without holding the flexible tube 29 and the one-way valve 3 against rotation with pliers or the like.

Claims (3)

1. water meter connecting apparatus, it comprises: a stopcock and a retaining valve, they are connecting the entrance and exit of a water meter respectively; And a base, it is used for stopcock and retaining valve are placed in connection axis between the entrance and exit of water meter with predetermined space, and this is at interval greater than the length overall of above-mentioned water meter; It is characterized in that: have the side surface that forms annular on the respective seat coupling part of stopcock outlet side and retaining valve entrance side, and have outstanding circular ring part; A supporting part and a fixture are located on the above-mentioned base, supporting part is used for assembling the lower half circle loop section of base coupling part with the circular ring partial cooperative, and fixture is used for assembling the upper semi-circle loop section of base coupling part and being fixed on supporting part by securing member with the circular ring partial cooperative; Flexible pipe is located in the inlet of the outlet of above-mentioned stopcock and above-mentioned retaining valve any one, be embedded with an annular base portion on the flexible pipe, this base portion can slide in an inboard opening portion with the watertightness state, thereby makes flexible pipe to advance and retreat; Polygon sidepiece littler than the external diameter of above-mentioned annular base portion is formed on the end side of above-mentioned annular base portion of above-mentioned flexible pipe continuously; The front end face of above-mentioned supporting part and fixture one or both of is formed to such an extent that be complementary with the polygon sidepiece.

2. water meter connecting apparatus as claimed in claim 1, it is characterized in that, above-mentioned stopcock is formed like this, be that its body and base coupling part rotatably link together each other, have the conical section on week in the annulus section on week and are located in open end is located on one in the connection end of the two, this conical section is configured to begin inwardly to reduce continuously diameter from above-mentioned annulus section; An annular groove is located in the circumference of annulus section, and the C shape circlip that can enlarge and dwindle is placed in the groove, thereby can be absorbed in the groove; Simultaneously, the corner angle part on the edge of opening of the above-mentioned annular groove of open end side inclined cut by connecting the end at this has formed a sloping portion; Another connects end and has corresponding with last connection end a conical section on the periphery, an annulus section and annular groove of being located at, being arranged so that of the width of above-mentioned annular groove, outstanding internal diameter sidepiece from the annular groove of last link portion on the back-up ring can with such state with side contacts in it after a described groove that connects the end, promptly be applied on the C shape circlip without any external force.

3. water meter connecting apparatus as claimed in claim 1 or 2, it is characterized in that, base is provided with the flange that is used to rest on the base installed surface, and the crab-bolt jack is given prominence on above-mentioned base installed surface, is used for the land jack that base is tightened on the base installed surface is located at above-mentioned flange.

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