KR101335453B1 - Device for handling valve in underground - Google Patents

Abstract

Easy to carry, more convenient to operate the valve, easier to operate the valve with less force according to the valve condition, and quick action regardless of the valve installation depth or stem type of the valve, A rod part connected to a valve embedded in the basement and extending upward to operate the valve, a handle part connected to a central part at an upper end of the rod part and extending in a direction perpendicular to the rod part to apply rotational force to the rod part, the rod The buried valve opening and closing device is provided at the lower part including a stem for connecting the stem and the rod of the valve.

Description

Landfill valve opening and closing device {DEVICE FOR HANDLING VALVE IN UNDERGROUND}

The present invention relates to an apparatus for opening and closing a valve embedded in the ground. More specifically, the present invention relates to a buried valve opening and closing device that allows the valve opening and closing operation on the ground more easily.

In general, combustion gases such as liquefied petroleum gas (LPG) or liquefied natural gas (LNG) are used in various places as inexpensive clean fuel. The gas is mainly transported to the required place through piping buried in the ground. One side of the pipe embedded in the ground is provided with a valve for blocking the transfer of gas.

A manhole connected to the ground is installed at the valve installation position for the valve operation. And the upper end of the manhole is provided with a manhole cover to protect the inside of the manhole. In this case, the operator can open and close the pipe by opening the manhole cover and manipulating the valve of the pipe located inside the manhole.

Here, since the valve is located deep in the manhole, in order to operate the valve, a separate valve opening and closing mechanism extending from the ground to the operating position must be used.

However, the conventional valve opening and closing mechanism is fixed and inconvenient to carry, and when the valve is aging and the operation is not smooth, stiff or strongly locked, two or more workers should cooperate to turn the mechanism. there is a problem.

In addition, when the buried position of the valve is deep from the ground, there is a disadvantage that the work is inconvenient and the length of the mechanism must be adjusted.

In addition, since the stem type of the valve varies according to the type of valve, it is inconvenient to prepare a plurality of mechanisms suitable for various stems at all times. .

Accordingly, the present invention provides a buried valve opening and closing device that is easy to carry and to operate the valve more conveniently.

In addition, there is provided a buried valve opening and closing device that can easily operate the valve with less force in accordance with the valve state.

In addition, a buried valve opening and closing device capable of operating the valve regardless of the installation depth of the valve is provided.

In addition, a buried valve opening and closing device is provided to enable a quick action regardless of the stem type of the valve.

To this end, the apparatus is selectively connected to a valve buried underground and extends upwardly to operate the valve, and a central portion is connected to an upper end of the rod portion and extends perpendicularly to the rod portion to extend rotational force to the rod portion. It may include a handle portion for applying, the stem portion is installed at the lower end of the rod portion connecting the stem and the rod portion of the valve.

The apparatus may further include a manhole cover opening portion installed at the bottom of the rod portion to open a cover of the manhole in which the valve is embedded.

The opening portion may include a latch that is coupled to the lower end of the rod portion to be rotatably coupled to the rod portion to be folded to form a sharp angle with the rod portion and to be rotated outward and formed in a fastening hole formed in the manhole cover.

The rod portion may have a multi-stage telescopic pipe structure in which a plurality of rods are slidably fitted to each other to vary in length.

The rod portion includes a fixing portion for fixing a variable length of the plurality of rods, the fixing portion is coupled to the coupling hole formed in the longitudinal direction in the rod, and installed in the rod located relatively inward and open toward the coupling hole Bracket having a fart, it is installed in the bracket may include a fixing ball protruding through the opening to be caught in the coupling hole, the spring is installed in the bracket and applies an elastic force to the fixing ball.

The handle part may have a structure having a variable length including a coupling member to which the rod part is coupled, a handle installed on both sides of the coupling member and extending outwardly, and auxiliary handles slidably installed at both ends of the handle.

The handle may have a structure in which one side is cut and the cutting parts are axially coupled to each other so that the cutting parts are pivoted at an angle in the longitudinal direction of the rod part.

The handle part may further include a ratchet coupling part installed on the coupling member to fix the rod part and to control a rotation direction of the rod part in one direction.

The ratchet coupling part includes a body installed in the coupling member, a ratchet gear rotatably installed in the body, and one end of the ratchet gear is axially coupled to the body so as to be rotatable, and the other end of the ratchet gear is engaged with the ratchet gear to one direction of the ratchet gear. A pair of ratchet blocks for controlling rotation, a spring for applying an elastic force to the ratchet blocks, a shift lever installed to be movable between the pair of ratchet blocks, and a switching lever for selectively engaging one ratchet block with the ratchet gear, the ratchet gear Installed in and exposed to the outside of the body, the front may include a fastening portion formed with a groove corresponding to the fitting portion to fit the fitting portion of the polygonal cross-sectional structure formed on the top of the rod portion.

The stem part has an upper end forming a fitting part fitted to the rod part, and a lower end of the stem part is spaced apart from each other to form a fork part, a rotating body rotatably axially coupled between the fork part of the support body, and the outer circumferential surface of the rotating body. It is installed along the front end may include a mount member formed with a stem coupling groove coupled to the valve stem.

The stem part includes a seating groove formed in the rotor to fix the rotating body with respect to the support body, a fixed ball that is installed inside the support contacting the seating groove and caught by the seating groove, and a spring for applying elastic force to the fixed ball. Include.

The stem portion may further include a fixing groove formed in the rotating body, and a fixing screw screwed into the support to insert the tip into the fixing groove.

The stem portion has a fitting portion of a polygonal cross-sectional structure protrudingly formed on the outer circumferential surface of the rotating body so as to detachably couple the mount member, and the mounting member has an insertion hole having a shape corresponding to the fitting portion so that the fitting portion is inserted. Can be.

Thus, according to the device, it is easy to carry by minimizing the size of the equipment.

In addition, the length can be adjusted according to the valve position, it is easy to work and increase the work efficiency.

In addition, it is possible to operate the valve with less force by using the extended handle.

In addition, it is possible to apply to a variety of valve stem in one equipment, there is no need to prepare a variety of equipment, it is possible to respond quickly to the emergency situation by the equipment change is made quickly according to the valve stem.

In addition, there is no need to provide a separate mechanism for opening the manhole cover, it is possible to proceed with the operation more simply.

1 is a schematic diagram showing an opening and closing device for manipulating a buried valve in a manhole according to this embodiment.
2 is an exploded perspective view showing a buried valve opening and closing apparatus according to the present embodiment.
3 is a cross-sectional view of the embedded valve opening and closing apparatus according to the present embodiment.
Figure 4 is a schematic diagram showing the configuration of the ratchet coupling portion of the buried valve opening and closing device according to this embodiment.
5 is a cross-sectional view showing the stem portion of the buried valve opening and closing device according to the present embodiment.
6 is a schematic view showing a manhole cover open state of the buried valve opening and closing device according to the present embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. As those skilled in the art can easily understand, the embodiments described below may be modified in various forms without departing from the concept and scope of the invention, and the embodiments described herein. It is not limited to the example.

The drawings are schematic and illustrate that they are not drawn to scale. The relative dimensions and ratios of the parts in the figures are shown exaggerated or reduced in size for clarity and convenience in the figures, and any dimensions are merely illustrative and not restrictive.

Hereinafter, the apparatus will be described as an example of an opening and closing device for a valve installed in the gas pipe to open and close the pipe. However, the apparatus is not limited thereto, and is applicable to the valves of all the conveying pipes that open and close the valve by rotating the lever.

1 illustrates an opening and closing device for manipulating a buried valve in a manhole according to the present embodiment, and FIGS. 2 and 3 are exploded perspective views and cross-sectional views illustrating the buried valve opening and closing device.

As shown, a valve 110 for blocking the transfer of gas is installed on one side of the pipe 100 embedded in the ground, the valve 112 is provided with a stem 112 forming the axis of the valve protrudes upward. A manhole 120 connected to the ground is installed at the valve installation position for the valve operation, and a manhole cover 130 is installed at an upper end of the manhole to protect the inside of the manhole.

Thus, if necessary, the operator opens the manhole cover 130 and connects the apparatus 10 to the stem 112 of the pipe valve located inside the manhole 120 to operate the valve 110 embedded in the ground. do.

The valve opening and closing device 10 according to the present embodiment is connected to the valve 110 located at the bottom of the manhole 120 and extends upwardly to manipulate the valve, and a central portion at the top of the rod portion 20. Is connected to and extends in a direction perpendicular to the rod portion 20, the handle portion 30 to apply a rotational force to the rod portion 20, the rod portion 20 is installed on the lower end of the stem 112 of the valve 110 ) And a stem portion 40 connecting the rod portion 20.

The rod portion 20 has a telescopic structure that is stretched and contracted in multiple stages and whose length is variable. The rod portion 20 is a hollow pipe-like structure, and may be made of a polygonal cross-sectional structure such as a square or a pentagon so as not to rotate itself, and is not particularly limited in its form.

In the present embodiment, the rod part 20 includes a first rod 21 at the outermost side, a second rod 22 that is fitted inside the first rod 21 and slides along the length direction, and the second rod ( 22) It is a structure that is stretched in three stages including a third rod 23 that is fitted inside and slides in the longitudinal direction. The first rod 21, the second rod 22, and the third rod 23 have a cross-sectional shape corresponding to each other and only have different diameters. The first rod 21 has an outer diameter of the rod portion 20 having the largest diameter structure, and the fitting portion 24 for coupling with the handle portion 30 is installed at an upper end thereof. The third rod 23 forms the lower end of the rod part 20, and the coupling part 25 is installed at the end thereof so that the stem part 40 may be coupled thereto.

Accordingly, when the second rod 22 is inserted into the first rod 21 and the third rod 23 is inserted into the second rod 22, the length of the entire rod part 20 is reduced. When the second rod 22 and the third rod 23 are withdrawn from the 21 and the second rod 22, the length of the rod 20 is increased.

Therefore, the length of the rod part 20 can be shortened and carried and moved easily, and by pulling out each rod and extending the length of the rod part 20, the valve embedded in the deep underground can be operated easily.

In addition, the rod part 20 further includes a fixing part 50 for fixing the position of each rod so as to keep the state of varying the length by sliding each rod.

As shown in FIG. 3, the fixing part 50 is installed inside the rod part 20. In this embodiment, the fixing part 50 is installed inside the second rod 22 and inside the third rod 23. Since the structure of the two fixing parts are the same, the structure of the fixing part installed inside the second rod 22 will be described below.

The fixing part 50 is installed in the coupling hole 51 formed along the longitudinal direction of the rod part 20 and the second rod 22 located inside the first rod 21 and the coupling hole 51. Bracket 52 having an opening toward the), the fixing ball 53 is installed in the bracket 52 and protrudes through the opening to be caught in the coupling hole 51, the bracket 52 is installed in the It includes a spring 54 for applying an elastic force to the fixing ball (53).

Therefore, the fixing ball 53 provided in the bracket 52 of the second rod 22 is pushed toward the opening by the elastic force of the spring 54 to maintain a state pressed on the inner surface of the first rod 21. . When the second rod 22 is slid relative to the first rod 21 in this state, the fixing ball 53 moves along the inner surface of the first rod 21 and is formed on the first rod 21. When it reaches the coupling hole 51 is pushed out by the elastic force of the spring 54 is fitted into the coupling hole 51. Accordingly, the second rod 22 is in a state in which the fixing ball 53 pushed outward by the spring 54 is caught in the coupling hole 51 of the first rod 21, and thus, relative to the first rod 21. The movement of the second rod 22 is fixed. When the second rod 22 is moved by applying a force greater than the force of the spring 54 that presses the fixing ball 53 to the second rod 22, the bracket 52 is positioned at the coupling hole 51. The fixing ball 53 is pushed out of the coupling hole 51 while compressing the spring 54. Accordingly, the fixing of the fixing ball 53 to the coupling hole 51 is released so that the second rod 22 is movable with respect to the first rod 21.

The handle part 30 is a coupling member 31 to which the rod part 20 is coupled, a handle 32 of a pipe structure which is installed on both sides of the coupling member 31 and extends outwardly, and the handle ( It includes a multi-stage telescopic pipe structure of variable length, including auxiliary handles 33 slidably installed at both ends of the 31.

Here, the handle 32 is cut on one side and separated into two members, and the cutting parts of the two members are pivotally coupled to each other via the rotation shaft 34 so as to rotate at an angle with respect to the longitudinal direction of the handle 32. It may be a structure that is folded. This makes it easier to store and move the handle portion 30.

The auxiliary handles 33 are respectively provided at both ends of the handle 32 and fitted into the handle 32 to slide along the longitudinal direction of the handle 32. The auxiliary handles 33 and 31 have a cross-sectional shape corresponding to each other with the handle 32 and only have different diameters. When the auxiliary handle 33 is inserted into the handle 32, the overall length of the handle part 30 is reduced, and when the auxiliary handle 33 is drawn out from the handle 32, the length of the handle part 30 is increased. Will increase.

Therefore, the length of the handle portion 30 can be shortened and easily carried and moved. When the valve is strongly locked, the auxiliary handle 33 is pulled out of the handle 32 to extend the length of the handle part 30, thereby increasing the rotational force applied to the rod part 20. This makes it possible to operate the valve with less force.

Here, the handle portion 30 and the rod portion 20 may be made of a light and strong material, for example, stainless steel, duralumin, or the like, and the material is not particularly limited.

In addition, the handle portion 30 is installed on the coupling member 31, the rod portion 20 is fixed and includes a ratchet coupling portion 60 for controlling the rotation direction of the rod portion 20 in one direction. Accordingly, when the rod part 20 is mounted on the ratchet coupling part 60, the handle 32 and the rod part 20 are combined in a T-shape to form a body.

As shown in Figures 2 and 4, the ratchet coupling portion 60 is a body 61 is installed on the coupling member 31 of the handle 32, the ratchet rotatably installed in the body 61 One end of the gear 62, the one end is axially coupled in the body 61 is rotatably installed, the other end is engaged with the ratchet gear 62, a pair of ratchet blocks for controlling the one-way rotation of the ratchet gear 62 ( 63), a spring 64 for applying an elastic force to the ratchet block 63, and a pair of ratchet blocks 63 moveably installed to selectively fit the ratchet block 63 to the ratchet gear 62. Switching lever 65 for snapping, the ratchet gear 62 is installed to expose the outside of the body 61, the front fitting portion 24 of the polygonal cross-sectional structure formed on the top of the rod portion 20 is fitted And a fastening part 67 having a groove 66 corresponding to the shape.

The fitting portion 24 of the rod portion 20 is installed by being inserted into the groove 66 of the fastening portion 67 by interference fit.

When the switching lever 65 is operated as described above, the switching lever is moved from one side of the body 61 to one side of the ratchet block 63 by pushing the ratchet block 63 of the two ratchet blocks 63 away from the ratchet gear 62. Let's go. Accordingly, the other ratchet block 63 located opposite to the moving direction of the shift lever 65 is rotated by the elastic force of the spring 64 to engage the ratchet gear 62 so as to rotate the ratchet gear 62 in the forward direction. Or it is controlled in a fixed state in which rotation is limited in the reverse direction or in both directions. Therefore, the fastening portion 67 provided in the ratchet gear 62 is rotated only in one direction like the ratchet gear 62.

That is, when one side ratchet block 63 is engaged with the ratchet gear 62, the ratchet gear 62 is latched like the handle part 30 only when the ratchet gear 62 is caught by the ratchet block 63 when the handle part 30 is rotated. The gear 62 is rotated so that the fastening portion 66 installed on the ratchet gear 62 is rotated. When the handle portion 30 is rotated in the opposite direction, the ratchet block 63 is not caught by the ratchet gear 62 so that only the handle portion 30 is idling regardless of the ratchet gear 62.

Therefore, when the handle part 30 is reciprocated in a predetermined angle range, the ratchet gear 62 is rotated only in one direction by the ratchet block 63 engaged with the ratchet gear 62. Accordingly, the fastening part 67 installed on the ratchet gear 62 is also rotated in only one direction, so that the valve can be operated by rotating the rod part 20 coupled to the fastening part 67 in one direction.

Meanwhile, referring to FIGS. 2 to 5, the stem part 40 will be described below. As shown, the stem portion 40 forms a fitting portion 41 to which the upper end is fitted to the coupling portion 25 installed at the end of the third rod 23 of the rod portion 20, and the lower portion of the stem portion 40 is divided into two members. A support body 43 spaced apart from each other to form a fork part 42, a rotating body 45 rotatably coupled to a pivot shaft 44 provided between the fork part of the support body, and an outer peripheral surface of the rotating body 45. It is installed along the tip and includes a mount member 47 formed with a stem coupling groove 46 is coupled to the valve stem 112.

The fitting portion 41 of the stem portion 40 has a polygonal cross-sectional structure and the coupling portion 25 of the third rod 23 corresponds to the fitting portion 41 so that the fitting portion 41 is fitted. Groove 26 is formed. The fitting portion 41 is inserted into the groove 26 formed in the coupling portion 25 by interference fit.

In addition to the above structure, the fitting portion 41 may have male threads formed on the outer circumferential surface thereof, and the coupling portion 25 of the third rod 23 may have female threads corresponding to the male threads of the fitting portions formed on the inner circumferential surface thereof, and may be installed by screwing together. have.

In the present embodiment, the rotating body 45 is provided with two mounting members 47 in the radial direction at an angle of 90 degrees along the outer circumferential surface. The number of mount members 47 provided in the rotating body 45 is not limited thereto, and may be variously modified.

The stem portion 40 is detachably coupled to the mounting member 47 to the rotating body 45. To this end, the fitting portion 48 having a polygonal cross-sectional structure is formed on the outer circumferential surface of the rotating body 45, and the mounting member 47 has a shape corresponding to the fitting portion 48 such that the fitting portion 48 is inserted. The insertion hole 49 is formed.

In order to increase the coupling force of the mounting member 47 to the rotating body 45, as shown in Figure 4, the contact surface of the fitting portion 48 and the insertion hole 49, the spring 70 in a position corresponding to each other The fixed ball 71 is elastically pressed by the), and the seating groove 80 in which the fixed ball is seated can be formed. The fixing ball installed on the inner circumferential surface of the insertion hole is inserted into the mounting groove formed on the outside of the fitting portion, thereby increasing the fixing force of the mount member.

The mount members 47 are formed with stem coupling grooves 46 different in size from each other, and are applicable to valve stems 112 of different sizes. As described above, the stem coupling groove 46 formed in the mount member 47 may have a different cross-sectional shape in addition to the structures having different sizes. The mount member 47 having the stem coupling grooves 46 of different sizes or shapes may be provided in various sizes or shapes, and may be selectively mounted on the stem portion 40 as necessary.

Mounting the mounting member 47 necessary for this and to rotate the rotating body 45 is possible to select and use different types of stem coupling groove 46 formed in each of the mounting member 47. Therefore, the stem coupling groove 46 of the type corresponding to the valve stem is directed outward so that the present apparatus can be simply set to fit the valve stem 112.

Here, the stem portion 40 is configured to fix the rotating body 45 to the support 42 so that the rotating body 45 can be maintained in a rotated state.

To this end, the stem portion 40 is installed in the seating groove 73 formed on the outer circumferential surface of the rotating body 45 and the support 42 in contact with the seating groove 73 is fixed to the seating groove ( 74 and a spring 75 for applying an elastic force to the fixing ball. Accordingly, the rotating body 45 is not freely rotated, and when the seating groove 73 reaches the position of the fixed ball 74 during rotation, the fixed ball enters the seating groove so that the rotation of the rotating body can be regulated.

In addition, in order to more securely fix the rotating body 45, the stem portion is formed with a fixing groove 76 in the rotating body 45, the support 42 in a position corresponding to the fixing groove 76 A female screw hole 77 is formed therethrough, and the screw thread is screwed into the female screw hole to penetrate the fixing screw 78 therein so that the tip of the fixing screw 78 is fitted into the fixing groove 76 so as to rotate the rotating body 45. The structure is fixed.

On the other hand, the apparatus 10 further includes a manhole cover opening part installed at the bottom of the rod part 20 to open the manhole cover 130 of the manhole 120 in which the valve is embedded. One end of the opening part is rotatably coupled to the lower end of the third rod 23 to be folded to the rod part 20, to be formed at an acute angle with the rod part 20, and to be rotated outwards, and formed in the manhole cover 130. 132 is fitted to the latch (80).

Figure 6 shows a state of opening the manhole cover with the device using the latch.

As shown, the manhole cover 130 is formed with a fastening hole 132 into which a lanyard for opening the manhole cover 130 is fitted. Accordingly, the operator can easily move the manhole cover 130 by using the latch 80 to the fastening hole 132.

The operator elongates the rod part 20 of this apparatus and unfolds the latch 80 provided in the 3rd rod 23 to the outside. When the rod part 20 is tilted in the horizontal direction, the clamp 80 is inserted into the fastening hole 132 of the manhole cover 130 and the rod 20 is lifted up. ) Will be lifted up. As such, the device does not have a separate mechanism for opening the manhole cover 130, and thus, the manhole cover 130 can be easily opened using the latch 80 provided in the device.

Hereinafter, the operation of the apparatus will be described.

The device is separated from the handle portion 30, the rod portion 20 and the stem portion 40, each made of a minimum size, easy and easy to store and move. For valve operation, the operator couples the stem portion 40 to the tip of the rod portion 20 and couples the rod portion 20 to the handle portion 30. The stem portion 40 coupled to the rod portion 20 mounts the mount member 47 formed with the stem coupling groove 46 corresponding to the valve stem 112 to be operated to the rotating body 45 and the stem coupling groove. The rotating body 45 is rotated to face this tip. The rotating body is completely fixed using the fixing screw 48.

When the setting of the device is completed, the operator extends the length of the rod part 20 to the position where the valve is installed, and inserts the stem coupling groove 46 of the rotating body 45 into the valve stem 112 and then the handle part. Turn the 30 to operate the valve.

At this time, when the locked state of the valve 120 is strong or the operation of the valve is tight, the auxiliary handle 33 is pulled out from the tip of the handle 32 to increase the total length of the handle part 30, thereby increasing the rotational force applied to the valve. It can increase.

While the illustrative embodiments of the present invention have been shown and described, various modifications and alternative embodiments may be made by those skilled in the art. Such variations and other embodiments will be considered and included in the appended claims, all without departing from the true spirit and scope of the invention.

10: valve opening and closing device 20: rod
21: first rod 22: second rod
23: 3rd rod 24, 41, 48: fitting portion
25: coupling part 26,66: groove
30: handle portion 31: coupling member
32: handle 33: auxiliary handle
34,44: Rotating shaft 40: Stem part
42: fork 43: support
45: rotating body 46: stem coupling groove
47: mounting member 49: insertion hole
50: fixing part 51: coupling hole
52: bracket 53,71,74: fixed ball
54, 64, 70, 75: spring 60: ratchet coupling portion
61 body 62 ratchet gear
63: ratchet block 65: switching lever
67: fastening portion 76: fixing groove
77: female thread hole 78: fixed screw
80: brace

Claims (12)

A rod part which is selectively connected to a valve buried underground and extends upward to operate the valve, and a handle part which is connected to a central part at an upper end of the rod part and extends perpendicularly to the rod part to apply rotational force to the rod part; A stem part installed at a lower part of the rod part and connecting the stem and the rod part of the valve,
The handle part includes a coupling member to which the rod part is coupled, a handle installed on both sides of the coupling member and extending outwardly, and auxiliary handles slidably installed at both ends of the handle.
The stem part has an upper end forming a fitting part fitted to the rod part, and a lower end of the stem part is spaced apart from each other to form a fork part, a rotating body rotatably axially coupled between the fork part of the support body, and the outer circumferential surface of the rotating body. A buried valve opening and closing device that is installed along a mount member including a mount member having a stem coupling groove coupled to the valve stem at the front end thereof. The method of claim 1,
The handle is a buried valve opening and closing device of the structure is one side is cut and the cutting parts are pivotally coupled to each other is rotated in the longitudinal direction of the rod portion. The method of claim 1,
A buried valve opening and closing device further comprising a manhole cover opening part installed at a lower end of the rod part to open a lid of the manhole in which the valve is embedded. The method of claim 3, wherein
The manhole cover opening is a buried valve opening and closing device comprising a latch which is coupled to the lower end of the rod portion is rotatably coupled to the rod portion and rotated outward to form an acute angle with the rod portion and fitted into the fastening hole formed in the manhole cover. The method of claim 3, wherein
The handle part is a buried valve opening and closing device installed on the coupling member further comprises a ratchet coupling portion for fixing the rod portion in one direction to control the rotation direction of the rod portion. The method of claim 5, wherein
The ratchet coupling part includes a body installed in the coupling member, a ratchet gear rotatably installed in the body, and one end of the ratchet gear is axially coupled to the body so as to be rotatable, and the other end of the ratchet gear is engaged with the ratchet gear to one direction of the ratchet gear. A pair of ratchet blocks for controlling rotation, a spring for applying an elastic force to the ratchet blocks, a shift lever installed to be movable between the pair of ratchet blocks, and a switching lever for selectively engaging one ratchet block with the ratchet gear, the ratchet gear The buried valve opening and closing device which is installed in and exposed to the outside of the body and the front portion includes a fastening portion formed with a groove corresponding to the fitting portion to fit the fitting portion of the polygonal cross-sectional structure formed on the top of the rod portion. The method of claim 5, wherein
The rod part is a buried valve opening and closing device of the multi-stage telescopic pipe structure is variable in length by sliding the plurality of rods are fitted to each other. The method according to any one of claims 1 to 7,
The rod portion includes a fixing portion for fixing a variable length of the plurality of rods,
The fixing part is installed in the coupling hole formed in the longitudinal direction in the rod, and a rod located relatively inward and having an opening toward the coupling hole, installed in the bracket and protrudes through the opening to the coupling hole. An embedded valve opening and closing device including a fixed ball to be caught, a spring installed in the bracket and applying an elastic force to the fixed ball. delete The method of claim 8,
The stem portion has a fitting portion of a polygonal cross-sectional structure protrudingly formed on the outer circumferential surface of the rotating body so as to detachably couple the mount member, and the mounting member has an insertion hole having a shape corresponding to the fitting portion so that the fitting portion is inserted. Landfill valve switchgear. 11. The method of claim 10,
The stem part includes a seating groove formed in the rotating body, a fixed ball installed inside the support contacting the seating groove, and a spring for applying an elastic force to the seating groove. Landfill valve opening and closing device for securing. The method of claim 11,
The stem portion is a buried valve opening and closing device further comprising a fixing groove formed in the rotating body, and a fixing screw screwed into the support is inserted into the fixing groove.

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