Gas valve cover component and repair method

Abstract

The present invention provides a cover member that can temporarily prevent gas leaks from a gas valve, and a repair method using the cover member. [Solution] The cover member 1 is a cover member for a gas valve in which a handle member is attached to the valve body. It is a hollow shape made of an elastic material having an annular mounting portion 5 with one end open, and can be attached to the gas valve by housing the handle member in the internal space. When attached, the inner circumferential surface 5a of the mounting portion 5 is in close contact with the outer circumferential surface of the valve body, and grease is applied to the inner circumferential surface 5a of the mounting portion 5.

Description

Technical Field

[0001] The present invention relates to a cover member for a gas plug and a method for repairing a gas plug using the cover member.

Background Art

[0002] A gas meter is provided on a gas pipe such as city gas supplied to business premises or private houses. The gas meter measures the amount of gas used and monitors the gas usage status. As shown in Fig. 7(a), a meter gas plug 11 is provided as a gas plug on the gas pipe on the supply side to the gas meter. The meter gas plug 11 is a gas plug that can supply or stop gas to the gas meter, and in many cases, it is provided outdoors together with the gas meter.

[0003] Fig. 7(b) shows a side view of the meter gas plug, which is a view taken in the direction of arrow D in Fig. 7(a). As shown in Fig. 7(b), the meter gas plug 11 has a plug body 13 formed with a gas supply port 13a and a gas discharge port 13b to which each gas pipe is connected, a shutter 14 built in the plug body 13, and a handle member 12 for rotating the shutter 14. The plug body 13 has an opening at a position orthogonal to the gas path, and is formed so that the shutter 14 can be inserted. The handle member 12 has a disk-shaped base portion 12a attached so as to close the opening of the plug body 13, and a grip portion 12b formed to extend in one direction from the base portion 12a. The meter gas plug 11 is normally in a fully open state, and a gas hole (not shown) provided in the shutter 14 is in a state of communicating with each gas pipe. By grasping the grip portion 12b and rotating the handle member 12 by 90°, the meter gas plug 11 can be set to a fully closed state.

[0004] In the meter gas plug 11, grease is applied to the outer peripheral surface (for example, a tapered surface) of the shutter 14. By the inner peripheral surface of the plug body 13 and the outer peripheral surface of the shutter 14 being in close contact via the grease, gas leakage is prevented.

[0005] However, if the sealing performance deteriorates due to grease depletion from prolonged use, gas leaks may occur. For example, in Figure 7(b), gas may leak from the gap 15 between the valve body 13 and the handle member 12. Conventionally, meter gas valves designed to prevent gas leaks have been proposed. For example, Patent Document 1 discloses a gas cock (meter gas valve) with a structure that allows for easy and quick replacement of grease without removing the handle member. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Public Gazette No. 46-637 [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] Incidentally, the meter gas valve is regularly checked for gas leaks, for example, through periodic safety inspections (hereinafter also referred to as "regular inspections") that are conducted every year. During regular inspections, inspectors bring a gas detector close to the meter gas valve 11, specifically the gap portion 15, to confirm whether the measured value is below the standard value.

[0008] When a gas leak is detected by an inspector or a consumer, they report it to the safety center. An emergency safety unit is dispatched each time a report is made, and the dispatched unit carries out emergency repairs (such as replacing parts). However, regular safety inspections, for example, are conducted simultaneously by multiple inspectors, and each inspector inspects multiple locations in a single day. Therefore, a system in which an emergency safety unit is dispatched every time a gas leak is detected during a regular safety inspection is not efficient in terms of personnel, labor, and cost.

[0009] Therefore, it would be desirable to have a system in place where, when a gas leak is detected, temporary emergency measures are taken by inspectors, and full-scale repairs are carried out by repair companies at multiple locations simultaneously at a predetermined time.

[0010] This invention has been made in view of these circumstances, and aims to provide a cover member that can temporarily suppress gas leakage from a gas valve and a repair method using the cover member. [Means for solving the problem]

[0011] The cover member of the present invention is a cover member for a gas valve to which a handle member is attached to a valve body. The cover member has an annular mounting portion with one end open, and is made of a hollow elastic material with the portion other than the opening closed. The handle member can be housed in the internal space and attached to the gas valve, and in the attached state, the inner circumferential surface of the mounting portion is in close contact with the outer circumferential surface of the valve body.

[0012] The cover member may have a top-cylindrical main body with a mounting portion at one end and a base portion of the handle member housed inside, and a grip housing portion that extends radially outward in an elongated manner from any circumferential position of the main body and houses the grip portion inside.

[0013] In the cover member, it is preferable that grease is applied to the inner circumferential surface of the mounting portion.

[0014] The main body preferably has a grippable handle portion at a circumferential position that does not overlap with the grip housing portion. Furthermore, the handle portion may be formed in an arc shape, extending radially outward from the main body in a plan view, and may have a bottom wall portion extending radially outward from the outer circumference of the main body and a side wall portion erected from the bottom wall portion.

[0015] The grip housing portion may be formed such that at least a portion of its top surface is positioned higher than the top surface of the main body.

[0016] The inner circumferential surface of the mounting portion may be formed as a curved surface that bulges convexly toward the radially inner side. Also, the thickness of the bulged portion may be larger than the thickness of the outer peripheral portion of the main body portion.

[0017] It is preferable that a protruding portion protruding 0.50 mm to 3.0 mm in the radially outer direction is formed over the entire circumference at the opening-side end of the outer circumferential surface of the mounting portion.

[0018] The repair method of the gas plug of the present invention is a repair method for repairing a gas leak of a gas plug to which a handle member having a grip portion is attached to a plug body, and the cover member of the present invention is attached to the gas plug so that the handle member is accommodated in the internal space, and the inner circumferential surface of the mounting portion is brought into close contact with the outer circumferential surface of the plug body.

[0019] After attaching the cover member, it is preferable to attach an annular elastic body to the outer circumferential surface of the mounting portion of the cover member.

Effect of the Invention

[0020] By having the above-described configuration, the cover member of the present invention covers the gas plug together with the handle member, and since the inner circumferential surface of the mounting portion is in close contact with the outer circumferential surface of the plug body, gas leakage from the gas plug can be temporarily suppressed. As a result, it is not necessary to perform emergency repair measures each time, and it leads to an improvement in the efficiency of the safety system such as being able to carry out a comprehensive repair.

Brief Description of the Drawings

[0021] [Figure 1] It is a plan view of the cover member according to the present invention. [Figure 2] It is a sectional view taken along line A-A of the cover member of FIG. 1 and a partially enlarged view thereof. [Figure 3] It is a sectional view taken along line B-B of the cover member of FIG. 1. [Figure 4] It is a view showing a state in which the cover member of FIG. 1 is attached to a meter gas plug. [Figure 5] It is a photograph showing a state (Example 1) in which the cover member is attached to a meter gas plug. [Figure 6] A photograph showing the state where the cover member is attached to the meter gas plug (Example 3) and a graph showing the time course of the leakage amount and the like. [Figure 7] A diagram for explaining the meter gas plug.

Mode for Carrying Out the Invention

[0022] The cover member according to the present invention is a jig attached to a gas plug and is a member that temporarily suppresses gas leakage from the gas plug. This cover member is used as an emergency measure when gas leakage is detected by a gas plug, for example, during a regular safety inspection. Here, the degree of gas leakage at which the gas leak detector reacts is 20 ml / min to 50 ml / min.

[0023] The gas plug (for example, a meter gas plug) to which the cover member of the present invention is attached has a structure in which a handle member 12 is attached to a plug body 13, as shown in FIG. 7. The specific configuration of the gas plug is not particularly limited. For example, a configuration in which a grease injection port capable of supplying grease to the built-in stopper is provided, a configuration in which no grease injection port is provided, a lock pin type configuration, etc. can be targeted.

[0024] The cover member according to the present invention will be described based on the drawings. FIG. 1 is a plan view of the cover member and shows a view seen from the direction opposite to the opening (top surface portion side). The cover member 1 is made of an elastic material having a hollow shape with the portion excluding the opening closed, and a space is formed inside. Depending on its material, the appearance of the cover member 1 is, for example, milky white translucent.

[0025] The elastic material of the cover member 1 is not particularly limited, but rubber, soft resin, elastomer, etc., can be used. Among these, rubber is preferred, and useful repair effects have been obtained with natural rubber, chloroprene rubber, butyl rubber, and silicone rubber. Especially considering outdoor use, it is more preferable to use silicone rubber, which has excellent heat resistance, water resistance, weather resistance, and cold resistance. The silicone rubber may be compounded with known additives such as reinforcing agents and lubricants as desired. In addition, as silicone rubber, for example, millable-type silicone rubber or liquid silicone rubber can be used. Millable-type silicone rubber is a solid silicone rubber that is molded by mixing vulcanizing material, etc., with a mixing roll machine or the like.

[0026] The hardness (Shore A hardness measured using a durometer) of the elastic material constituting the cover member 1 is, for example, 20° to 60°. Considering ease of attachment to and removal from the gas valve, a hardness of 20° to 40° is preferable.

[0027] In Figure 1, the cover member 1 has a circular opening on the opposite side (dotted line in Figure 1). The grip portion 12b of the handle member 12 (see Figure 7) is inserted into the internal space through this opening. The cover member 1 has an annular mounting portion 5 (see Figure 2) with one end open, and is structured to accommodate the handle member of the gas valve in its internal space and attach to the gas valve. Specifically, the cover member 1 has a top-cylindrical main body portion 2 in which the base portion of the handle member is housed, and a grip housing portion 3 in which the grip portion of the handle member is housed. The grip housing portion 3 is formed to extend radially outward in an elongated shape from an arbitrary circumferential position on the main body portion 2 and is molded integrally with the main body portion 2.

[0028] The main body 2 has a circular top surface 2a and a cylindrical outer circumference 2b as its components, which are smoothly connected by curved surfaces. The grip housing 3 has a rounded rectangular top surface 3a, an outer circumference 3b that forms the side surface, and a rounded bottom surface 3c as its components, which are smoothly connected by curved surfaces. Furthermore, each part of the main body 2 and each part of the grip housing 3 are also smoothly connected by curved surfaces.

[0029] Next, Figure 2 shows a cross-sectional view (section AA) of the cover member cut along its longitudinal direction. As shown in Figure 2, a space is formed inside the cover member 1, and the space S1 inside the main body 2 and the space S2 inside the grip housing 3 are in communication. The width of space S2 is narrower than that of space S1 (see Figure 3). The space inside the cover member 1 is closed except for one opening.

[0030] As shown in Figure 2, in the cover member 1, the wall thickness of the wall portions defining the main body portion 2 and the grip housing portion 3 is formed to be approximately constant. Specifically, the wall thickness of the top surface portion 2a and outer peripheral portion 2b of the main body portion 2, and the top surface portion 3a, outer peripheral portion 3b, and bottom surface portion 3c of the grip housing portion 3 are approximately constant in thickness t. Specifically, the thickness t is set to approximately 1 mm to 5 mm. By keeping it within this range, it is possible to maintain the strength against tearing and the like while maintaining the ease of deformation of the cover member 1.

[0031] The mounting portion 5 is integrally provided on one end of the main body portion 2 and is formed in a concentric ring shape with respect to the center O of the cylindrical outer circumference 2b of the main body portion 2. The outer diameter of the mounting portion 5 is smaller than the outer diameter of the outer circumference 2b of the main body portion 2. When the cover member 1 is attached to the gas valve, the inner circumferential surface 5a of the mounting portion 5 comes into close contact with the outer circumferential surface of the valve body of the gas valve. As a result, the gap portion 15 between the valve body 13 and the handle member 12, as shown in Figure 7, can be completely covered by the cover member 1, and gas leakage from the gas valve can be temporarily suppressed. Note that "temporarily" refers to the period from when a leak is discovered during a periodic safety inspection until the full repair is carried out, and this period is expected to be several days to about a week.

[0032] The inner circumferential surface 5a of the mounting portion 5 may be formed as an annular inner surface parallel to the axial direction, but it is preferable to form it as a curved surface that bulges radially inward in a convex shape, as shown in Figure 2(a). The outer circumferential surface of the plug body that the inner circumferential surface 5a makes close contact with may be a tapered surface or have a part of the structure of the gas supply port or gas outlet protruding, and the inner circumferential surface 5a is configured in this way to facilitate close contact with the outer circumferential surface of the plug body. The curved surface may be formed with a predetermined curvature or as a free-form curved surface. Also, the thickness of the bulging portion in the mounting portion 5 (for example, t a It is preferable that the thickness of the outer periphery 2b of the main body 2 is greater than the thickness t of the outer periphery 2b of the main body 2.

[0033] Furthermore, grease is applied to the inner circumferential surface 5a of the mounting portion 5. By interposing grease between the mounting portion 5 and the outer circumferential surface of the plug body, the sealing performance can be improved. In particular, even if the outer circumferential surface of the plug body that contacts the inner circumferential surface 5a of the mounting portion 5 is not smooth (for example, if the plug body is made of cast iron or if the outer circumferential surface of the plug body has become rough due to rust, etc.), reliable sealing can be ensured by applying grease to the inner circumferential surface 5a of the mounting portion 5. The type of grease applied is not particularly limited, but it is preferable to use silicone grease, which has excellent heat resistance, cold resistance, and water resistance. Silicone grease is a grease that uses silicone oil as a base oil and is compounded with thickeners such as metal soaps and various additives. The viscosity of the applied grease at 25°C is, for example, 10 to 1000 Pa·s.

[0034] The grip housing portion 3 is located at a height position h of at least a part of the top surface portion 3a. 3a (See Figure 3) The height position h of the top surface 2a in the main body 2. 2a It is formed to be higher than the above. Specifically, the height of the top surface 3a changes midway so that the height of space S2 expands towards the tip of the grip housing 3. By expanding the height of space S2 in this way, there is more space for the tip of the grip portion of the handle member to fit into during the process of attaching the cover member 1, making it easier to attach the cover member 1 to the gas valve.

[0035] In the internal space S2 of the grip housing 3, the height that is expanded is h a For example, this is set to 10% to 30% of the reference height h of space S2 (height from the inner surface of the bottom part 3c to the inner surface of the top part 2a).

[0036] As shown in Figure 2(a), a projection 5c is formed at the opening end of the outer circumferential surface 5b of the mounting portion 5, projecting radially outward. The projection 5c is formed continuously around the entire circumference of the outer circumferential surface 5b, but it may also be formed discontinuously. As shown in the enlarged view of Figure 2(b), the cross-sectional shape of the projection 5c is formed in the shape of a quarter circle with a predetermined curvature. Furthermore, the projection 5c is formed to be located inside the outer circumferential surface 2b of the main body portion 2. The projection width w of the projection 5c from the outer circumferential surface 5b is not particularly limited, but is, for example, 0.50 mm to 3.0 mm.

[0037] As described later, after attaching the cover member 1, it is preferable to attach the expandable body to the opening of the cover member 1 in order to improve the seal. As shown in Figure 2, by providing a projection 5c on the outer surface of the mounting part 5, it becomes easier to prevent the expandable body from coming off the mounting part 5.

[0038] Furthermore, in the cover member 1, the main body 2 has a handle portion 4 that can be grasped, taking into consideration ease of installation or removal. Also, as mentioned above, grease may be applied to the inner circumferential surface 5a of the installation portion 5, but since the cover member 1 has a handle portion 4, the worker can install the cover member 1 on the gas valve without directly touching the grease. The handle portion 4 is provided in a circumferential position that does not overlap with the grip housing portion 3 of the main body 2. Specifically, as shown in Figure 1, the handle portion 4 is provided in the circumferential region opposite to the grip housing portion 3, and in a plan view, it is formed in an arc shape that protrudes radially outward from the top cylindrical main body 2. In Figure 1, the handle portion 4 is formed in an arc shape with a central angle θ of 180° with respect to the center O of the outer circumference 2b. Here, for example, depending on the orientation of the meter gas valve fixed on the gas piping and the surrounding piping structure, the direction in which the meter gas valve can be approached when installing or removing the cover member may be limited. Therefore, by ensuring a somewhat wider angle θ of the handle portion 4, usability is improved. The central angle θ is set to, for example, 120° to 200°.

[0039] Furthermore, the handle portion 4 is formed to extend symmetrically on both sides from a circumferential position on the opposite side from the grip housing portion 3.

[0040] Furthermore, as shown in Figure 2, the handle portion 4 has a bottom wall portion 41 extending radially outward from the outer peripheral portion 2b near the mounting portion 5 of the main body portion 2, and a side wall portion 42 erected from the bottom wall portion 41. In this case, a groove is formed between the outer peripheral portion 2b and the side wall portion 42, making it easier for the worker to grasp with their fingers. Note that in the handle portion 4, both circumferential ends of the groove are not closed, but have an open structure. The thickness of the bottom wall portion 41 and the side wall portion 42 is made larger than the thickness t of the outer peripheral portion 2b of the main body portion 2, ensuring strength against deformation when grasped.

[0041] The cover member of the present invention is not limited to the configuration described above, and can be modified as appropriate.

[0042] Here, we will describe an example of the procedure for the repair method of the present invention using the cover member described above.

[0043] Inspectors conducting periodic safety inspections are expected to carry the above-mentioned cover members (for example, multiple members) and perform inspections at multiple locations. During the inspection, a gas detector is brought close to the meter gas valve at each target location to check for gas leaks. If the measured value exceeds the standard value, conventionally, a notification would be sent to a safety center, and emergency repair work would be carried out by an emergency safety unit. However, with the repair method of the present invention, the inspector uses the above-mentioned cover members to perform emergency repairs.

[0044] The cover components may be pre-applied with grease, or inspectors may apply the grease on-site.

[0045] This will be explained using Figure 4. When attaching the cover member 1 to the meter gas valve 11, first insert the grip portion of the handle member of the meter gas valve 11 through the opening, and insert it all the way into the grip housing portion 3 of the cover member 1. Then, expand the mounting portion 5 so that it covers the base of the handle member and houses the entire handle member. Then, adjust the shape of the mounting portion 5 of the cover member 1 so that its inner circumferential surface is in close contact with the outer circumferential surface of the valve body 13.

[0046] After attaching the cover member 1, the expandable body 6 is attached to the outer surface of the mounting portion 5 of the cover member 1 as needed. By pressing the expandable body 6 against the outside of the mounting portion 5, the airtightness is improved, making it easier to suppress gas leakage. As the expandable body 6, a string-like or annular expandable body such as a rubber band, rubber band, or rubber cord can be used. An annular expandable body is preferable because it makes it easier to evenly seal the inner surface of the mounting portion 5 against the outer surface of the stopper body 13, and a rubber band is specifically used. Note that multiple expandable bodies may be attached.

[0047] Then, after attaching the cover member 1, bring the gas detector close to the attachment point 5 of the cover member 1 and check for gas leaks again. If no gas leak is detected at this time, the repair is completed.

[0048] The cover component 1 remains attached to the meter gas valve 11 for several days to about a week. During major repairs, the cover component 1 is removed from the meter gas valve 11 for the repairs to be carried out. Therefore, in addition to being easy to attach, the cover component 1 must also be easy to remove and must not negatively affect the operability during repairs. Note that the cover component can be applied not only to meter gas valves but also to other gas valves.

[0049] For example, the cover component 1 has a handle portion 4, and is designed to be easily removed by placing a finger on the handle portion 4. While temporary emergency measures such as wrapping it with vinyl tape are possible, this method leaves adhesive residue after the tape is removed, which can negatively affect repair procedures due to its stickiness. In contrast, the cover component 1 only has a small amount of grease on it after removal, making it highly convenient from a repair procedure standpoint. [Examples]

[0050] The present invention will be described in detail below with reference to examples, but the invention is not limited in any way by these examples.

[0051] The gas leakage suppression using the cover member according to the present invention was evaluated. A 20A lock-pin type meter gas valve was prepared as the target meter gas valve. Seal tape was partially applied to the stopper and inserted into the valve body, and the handle member was attached to the valve body. Then, the handle member was rotated to open and close the valve repeatedly and adjusted to a predetermined gas leakage rate. Specifically, simulating a grease depletion situation, the air pressure was adjusted to about 3 kPa and the gas leakage rate to about 30 ml / min. The gas leakage rate was measured using a flow sensor.

[0052] A cover member with the shape shown in Figures 1 to 3 was integrally molded using a mold. A millable type silicone rubber with a hardness of 35° was used as the elastic material. The minimum inner diameter of the mounting part of the cover member was set to φ39 mm, and silicone grease was applied to the inner circumferential surface of the mounting part.

[0053] "Example 1" describes a test in which a cover member was attached to a meter gas valve used as a leak sample (see Figure 5). "Example 2" describes a test in which six rubber bands were attached to the outer surface of the attachment part after the cover member was attached. "Reference Example" describes a test in which the cover member was removed after being attached once. For each test example, including the state before the test, the amount of gas leakage and the presence or absence of reaction of the gas detector (model: TGPD-7, manufactured by Shin-Cosmo Electric Co., Ltd.) were measured. For Examples 1 and 2, the amount of gas leakage was measured after the cover member was attached and held for 3 minutes. Methane gas was used as the gas. The results are shown in Table 1.

[0054] [Table 1]

[0055] As shown in Table 1, in both Example 1 and Example 2, the amount of leakage was significantly reduced by attaching the cover member. Furthermore, it was confirmed that the gas detector did not detect any leakage in either example. In a comparison between Example 1 and Example 2, attaching a rubber band tended to further reduce the amount of leakage. In addition, the cover member was easy to attach and remove.

[0056] Furthermore, in order to check for variations due to differences in the workers who installed the cover components, similar tests were conducted by other testers, but no differences in leakage amount due to differences in workers were found.

[0057] In addition, the amount of leakage was measured separately more than one week (12 days) after the cover component was installed. As a result, the amount of gas leakage after 12 days was 0.48 ml / min, compared to 34.60 ml / min at the start, confirming that gas leakage can be reduced over a long period of time. Furthermore, it was confirmed that no leaks were detected by the gas detector.

[0058] Figure 6 shows the changes in pressure and gas leakage rate during gas leak suppression tests using different cover members. In this Example 3, six rubber bands were attached to the outer surface of the mounting area after the cover member was installed. The leakage rate before the test was approximately 4 ml / min, but as shown in Figure 6(b), the leakage rate was stably suppressed for 200 hours after installation, and the leakage rate was significantly reduced to approximately 1.4 ml / min.

[0059] As described above, the cover member according to the present invention can suppress gas leakage from the meter gas valve, specifically to a level of less than 3.0 ml / min or to a level that is not detected by a gas detector, making it suitable for temporary repairs such as periodic safety inspections. [Explanation of symbols]

[0060] 1: Cover component 2: Main body 2a: Top part 2b: Outer periphery 3: Grip housing 3a: Top part 3b: Outer periphery 3c: Bottom part 4: Handle section 41: Bottom wall 42: Side wall section 5: Mounting part 5a: Inner surface 5b: Outer surface 5c:Protrusion 6:Stretchable body 11: Meter gas valve 12: Handle component 12a: Base 12b: Grip section 13: Stopper body 13a: Gas supply port 13b: Gas outlet 14: Closure 15: Gap

Claims

1. This is a cover component for a gas valve, in which a handle component is attached to the valve body. The cover member has an annular mounting portion with one end open, and is made of a hollow elastic material with the portion excluding the opening closed, and can accommodate the handle member in its internal space and be attached to the gas valve. A cover member characterized in that, when installed, the inner surface of the mounting portion is in close contact with the outer surface of the plug body.

2. The cover member according to claim 1, characterized in that the cover member has a top cylindrical main body portion having the mounting portion at one end and housing the base portion of the handle member inside, and a grip housing portion extending radially outward in an elongated manner from any circumferential position of the main body portion and housing the grip portion inside.

3. The cover member according to claim 1 or 2, characterized in that grease is applied to the inner circumferential surface of the mounting portion.

4. The cover member according to claim 2, characterized in that the main body portion has a grippable handle portion at a circumferential position that does not overlap with the grip housing portion.

5. The cover member according to claim 4, characterized in that the handle portion, in a plan view, is formed in an arc shape extending radially outward from the main body portion, and has a bottom wall portion extending radially outward from the outer circumference of the main body portion and a side wall portion erected from the bottom wall portion.

6. The cover member according to claim 2, characterized in that the grip housing portion is formed such that the height position of at least a part of the top surface is higher than the height position of the top surface of the main body portion.

7. The cover member according to claim 1 or 2, characterized in that the inner circumferential surface of the mounting portion is formed as a curved surface that bulges radially inward in a convex shape.

8. The cover member according to claim 1 or 2, characterized in that a projection extending 0.50 mm to 3.0 mm radially outward is formed around the entire circumference of the opening-side end of the outer circumferential surface of the mounting portion.

9. This is a repair method for repairing gas leaks in a gas valve in which a handle member having a grip portion is attached to the valve body. A method for repairing a gas valve, characterized in that the cover member according to claim 1 or claim 2 is attached to the gas valve such that the handle member is housed in the internal space, and the inner circumferential surface of the attachment portion is brought into close contact with the outer circumferential surface of the valve body.

10. The method for repairing a gas valve according to claim 9, characterized in that, after the cover member is attached, an annular expandable body is attached to the outer circumferential surface of the mounting portion of the cover member.

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