A ball valve type plugging device for a runner access hole

Abstract

The present invention relates to a ball valve type plugging device for a runner access hole, which is used to plug or open the access hole formed in the top plate of the runner. The lower section of the access hole is a plugging hole, and the plugging hole is in a circular funnel shape with a gradually increasing diameter from top to bottom. The wall of the plugging hole is smooth to form a plugging surface. The ball valve type plugging device includes a hemispherical valve arranged in the plugging hole, a hinge member for hinging the hemispherical valve on the wall of the plugging hole, and a locking mechanism arranged between the hemispherical valve and the top plate of the runner. The hemispherical valve can enter upward or exit downward from the plugging hole. The spherical surface of the hemispherical valve faces upward and its radius is greater than the radius of the upper port of the plugging hole. The locking mechanism is used to lock the hemispherical valve in the plugging hole so that a tight contact is formed between the spherical surface and the plugging surface to form a seal. The ball valve type plugging device of the present invention has a simple structure, is convenient to use, has a good water stopping effect, is stable and reliable, and has strong anti-seepage ability.

Description

Technical Field

[0001] The present invention relates to the field of water conservancy projects, and particularly to a ball valve type plugging device for a runner access hole. Background Art

[0002] The "Code for Design of Pumping Stations" stipulates that access holes, also known as inspection holes, should be provided in both the inlet and outlet runners, and the aperture of which should not be less than 0.7m to facilitate personnel to enter the runner for maintenance. Accordingly, access holes should be provided on the runners in large and medium-sized pumping stations; in the past, the common method was to seal the access hole with a cover plate above it and resist the water pressure in the runner with the applied external force to achieve water stoppage; however, under the long-term and fluctuating water pressure jacking and impact, the effect was very unsatisfactory, and water seepage, leakage and cover plate damage often occurred, and some even seriously affected the normal operation of the pumping station. Summary of the Invention

[0003] In view of the above-mentioned disadvantages of the prior art, the technical problem to be solved by the present invention is to provide a ball valve type plugging device for a runner access hole, which can utilize the water pressure in the runner to plug the access hole, with good plugging effect, strong anti-seepage ability, and convenient and flexible use.

[0004] To achieve the above object, the present invention provides a ball valve type plugging device for a runner access hole, which is used to plug or open an access hole opened in the top plate of the runner. The lower section of the access hole is a plugging hole, and the plugging hole is in a circular funnel shape with a gradually increasing diameter from top to bottom. The wall of the plugging hole is smooth to form a plugging surface; the ball valve type plugging device includes a hemispherical valve arranged in the plugging hole, a hinge member for hinging the hemispherical valve on the wall of the plugging hole, and a locking mechanism arranged between the hemispherical valve and the top plate of the runner. The hemispherical valve can enter or exit the plugging hole upward, the spherical surface of the hemispherical valve faces upward and its radius is greater than the radius of the upper port of the plugging hole, and the locking mechanism is used to lock the hemispherical valve in the plugging hole so that a tight contact is formed between the spherical surface and the plugging surface to form a seal.

[0005] Further, the bottom plane of the hemispherical valve is flush with the bottom of the top plate of the runner.

[0006] Further, the inside of the hemispherical valve is hollow.

[0007] Further, the hinge member is a hinge, one end of which is hinged at the side of the bottom of the hemispherical valve and the other side is hinged on the wall of the plugging hole.

[0008] Further, a lifting structure is also arranged on the upper part of the hemispherical valve, and the lifting structure is used for personnel to operate the hemispherical valve to enter or exit the plugging hole.

[0009] Further, the lifting structure includes a chain with one end hinged on the hemispherical valve, and the other end of the chain extends out of the access hole.

[0010] Furthermore, the locking mechanism includes a locking seat disposed on the top plate of the flow channel and beside the top orifice of the access hole, and the chain passes through the locking seat and can be locked in the locking seat.

[0011] Furthermore, it further includes a cover plate disposed at the top orifice of the access hole.

[0012] As described above, the ball valve type plugging device involved in the present invention has the following beneficial effects:

[0013] By providing a hemispherical valve, a hinge member, and a locking mechanism that cooperate with the plugging hole, during normal closing operation, the hemispherical valve enters the plugging hole, and the hemispherical valve is locked by the locking mechanism, so that the spherical surface at its upper end is in close contact with the plugging surface of the plugging hole wall to form a seal, forming surface water stop. In this way, a good seal is achieved due to the close contact between the hemispherical valve and the hole wall, thereby successfully blocking the access hole; and when the liquid in the flow channel is full, the liquid will exert an upward pressure on the bottom plane of the hemispherical valve, making the spherical surface of the hemispherical valve press more tightly against the plugging hole wall. When it is necessary to open the access hole, the locking mechanism is unlocked, and the hemispherical valve exits the plugging hole under the action of gravity or thrust, and the hinge member is used to prevent the hemispherical valve from falling, thereby opening the access hole. The ball valve type plugging device of the present invention has a simple structure and is convenient to use, provides a new design concept, changes the conventional method of using traditional rubber strips to plug and stop water from the outside of the access hole, can utilize the water pressure in the flow channel to plug the access hole, turns "resistance" into "utilization", has a good plugging and water stop effect, is stable and reliable, and has strong anti-seepage ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural view of the ball valve type plugging device of the present invention.

[0015] Figure 2 It is a top view of the ball valve type plugging device of the present invention, and some structures are omitted in this figure.

[0016] Figure 3 It is a schematic view of the dimension design of the ball valve type plugging device of the present invention.

[0017] Figure 4 It is a schematic working view of the ball valve type plugging device of the present invention.

[0018] Figure 5 It is a schematic view of the ball valve type plugging device of the present invention in the open state.

[0019] DESCRIPTION OF REFERENCE NUMERALS

[0020] 1 Top plate of the flow channel

[0021] 2 Plugging hole

[0022] 2a Plugging surface

[0023] 3 Hemispherical valve

[0024] 3a Spherical surface

[0025] 3b Bottom plane

[0026] 4 Hinge

[0027] 5 Chain

[0028] 6 Cover plate

[0029] 7 Locking seat Detailed implementation manners

[0030] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0031] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have any technical substance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like cited in this specification are only for the convenience of description and are not used to limit the scope for the implementation of the present invention. Any change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope for the implementation of the present invention.

[0032] See Figures 1 to 5 , the present invention provides a ball valve type plugging device for a flow channel access hole, which is used to plug or open the access hole (or maintenance hole) opened in the flow channel top plate 1. In the present invention, the lower section of the access hole is a plugging hole 2, the plugging hole 2 is in a circular funnel shape and its diameter gradually becomes larger from top to bottom, and its hole wall is smooth to form a plugging surface 2a, that is, the plugging surface 2a is in a conical surface shape; the ball valve type plugging device includes a hemispherical valve 3 arranged in the plugging hole 2, a hinge member for hinging the hemispherical valve 3 on the hole wall of the plugging hole 2, and a locking mechanism arranged between the hemispherical valve 3 and the flow channel top plate 1. The hemispherical valve 3 can enter upward or exit downward from the plugging hole 2. The spherical surface 3a of the hemispherical valve 3 faces upward and its radius is greater than the radius of the upper port of the plugging hole 2. The locking mechanism is used to lock the hemispherical valve 3 in the plugging hole 2 so that a tight contact is formed between the spherical surface 3a and the plugging surface 2a to form a seal and achieve surface water stop.

[0033] The ball valve type plugging device involved in the present invention can be used for various manholes. In particular, it can be used for the manholes of the pump station flow channels. Its basic working principle is as follows: During normal closing operation, refer to Figure 4 , the hemispherical valve 3 enters into the plugging hole 2, and its spherical surface 3a faces upward. The hemispherical valve 3 is locked through the locking mechanism, so that a tight contact is formed between its spherical surface 3a and the plugging surface 2a to form a seal, achieving surface water stop. In this way, a good seal is formed between the spherical surface 3a of the hemispherical valve 3 and the plugging hole 2 due to the tight contact, so as to successfully block the manhole. And when the liquid in the flow channel is full, the liquid will exert an upward pressure on the bottom plane of the hemispherical valve 3, making the spherical surface 3a of the hemispherical valve 3 press more tightly against the plugging surface 2a of the plugging hole 2. Not only will the plugging not fail due to the liquid pressure, but on the contrary, a more firm seal can be formed by means of the liquid pressure; when it is necessary to open the manhole, refer to Figure 5 , unlock the locking mechanism, and the hemispherical valve 3 exits the plugging hole 2 under the action of gravity or thrust, and the hemispherical valve 3 is prevented from falling by the hinge, so that the manhole can be opened to facilitate the maintenance personnel to enter.

[0034] The ball valve type plugging device of the present invention has a simple structure and is easy to use. It provides a new design concept, changes the conventional way of plugging and water stopping by using traditional rubber strips from the outside of the manhole, and can utilize the pressure in the flow channel to plug the manhole, turning the "resistance" to water pressure into "utilization" of water pressure. The plugging and water stopping effect is good, stable and reliable, and the anti-seepage ability is strong. Moreover, the hemispherical valve 3 is matched with the circular funnel-shaped plugging hole 2. The hemispherical valve 3 is convenient to enter and exit the plugging hole 2, and the two cooperate flexibly to form a seal to achieve surface water stop, which is convenient for operation.

[0035] Refer to Figures 1 to 5 , and the following further illustrates the present invention with a specific embodiment:

[0036] In this embodiment, refer to Figure 1 and Figure 5 , the manhole is divided into two parts. The upper part is a circular vertical hole, and the lower part is the plugging hole 2. The plugging hole 2 is in an inverted funnel shape and expands from top to bottom. The radius size of the hemispherical valve 3 is determined according to the size of the plugging hole 2. When the hemispherical valve 3 enters the plugging hole 2 and contacts, the contacting surfaces of the two form a seal to achieve surface water stop. The bottom plane 3a of the hemispherical valve constitutes a pressure-receiving plane for bearing the liquid pressure in the flow channel. And preferably, the bottom plane 3b of the hemispherical valve 3 is roughly flush with the bottom of the flow channel roof 1. In this way, when the liquid in the flow channel is full, an upward pressure along the axial direction of the manhole can be exerted on the hemispherical valve, and the liquid flow in the middle flow channel is not affected.

[0037] In this embodiment, refer to Figure 1 and Figure 4As a preferred design, the interior of the hemispherical valve 3 is hollow to minimize its mass. It can be made of plastic, which is light, not easy to rust, and maintenance-free. On the premise of meeting the strength requirement, the hemispherical valve 3 should be as light as possible, and the upper spherical surface 3a should be smooth, and the hole wall of the blocking hole 2 should also be smooth.

[0038] In this embodiment, the hinge is a hinge 4, one end of which is hinged to the bottom side of the spherical semi-ball valve 3, and the other end is hinged to the hole wall of the blocking hole 2. The hinge 4 can be one or more. In normal operation, the hinge 4 stabilizes the semi-ball valve 3. When the semi-ball valve 3 is to be opened, refer to Figure 5 , the hemispherical valve 3 rotates downward around the hinge 4 to exit the blocking hole 2, and the hinge 4 pulls the hemispherical valve 3 to prevent it from falling. Preferably, when the flow channel top plate 1 is cast, holes can be reserved and iron parts can be embedded to facilitate hinge connection. Of course, the hinged part can also be a structure such as a hinged rod.

[0039] In this embodiment, as a preferred design, see Figure 1 , Figure 4 and Figure 5 , and also includes a lifting structure arranged on the upper part of the hemispherical valve 3. The lifting structure is used for personnel to operate the hemispherical valve 3 to enter or exit the blocking hole 2. The lifting structure preferably adopts a chain 5. One end of the chain 5 is hinged at a suitable position of the spherical surface 3a on the upper part of the hemispherical valve 3, and the other end extends out of the top opening of the entrance hole. Preferably, the chain 5 is at the hinge point of the hemispherical valve 3 and is located at opposite sides of the hinge 4, respectively, so that the hemispherical valve 3 can be more stable. In this way, by pulling the chain 5, the hemispherical valve 3 can be pulled to rotate to enter or exit the blocking hole 2, which is convenient to operate and simple in structure.

[0040] In this embodiment, see Figure 1 , Figure 4 and Figure 5 As a preferred design, the locking mechanism includes a locking seat 7 disposed on the flow channel top plate 1 and located next to the top opening of the manhole, and the chain 5 passes through the locking seat 7 and can be locked in the locking seat 7, so that after the semi-ball valve 3 is pulled by the chain 5 to rotate and enter the blocking hole 2, the chain 5 is locked in the locking seat 7 to complete the locking of the semi-ball valve 3. Of course, the locking mechanism can also adopt a variety of existing suitable mechanisms, and can also directly act between the semi-ball valve 3 and the flow channel top plate 1, which can achieve the above-mentioned locking of the semi-ball valve 3 in the blocking hole 2.

[0041] In the present invention, the sizes of the hemispherical valve 3 and the plugging hole 2 should be reasonably set according to the needs, see Figure 3, specifically in this embodiment, the thickness of the runner roof 1 is h, which is determined by the runner size and structure. The diameter of the top orifice of the access hole is d, which should meet the requirements for access and maintenance, generally greater than or equal to 700 mm. The depth h1 of the vertical hole section at the upper end of the access hole is 0.15h. Then, the depth h2 of the funnel-shaped plug hole 2 is h - h1. The inclination angle of the wall of the plug hole 2 is 60°. The diameter D of the lower port of the plug hole 2 is d + 2d1, where d1 = 1.15h. The bottom surface of the hemispherical half-ball valve 3 is flush with the bottom of the runner roof 1. Thus, the radius φ of the half-ball valve 3 can be approximately determined as 0.9h.

[0042] When the half-ball valve 3 is normally closed in the plug hole 2, static equilibrium should be satisfied. In the closed state, the forces acting on the half-ball valve 3 include water pressure, buoyancy, gravity, and the reaction force from the plug hole 2, forming a balanced force system. That is, under the action of external loads, the half-ball valve 3 must satisfy the static equilibrium condition: In the formula, ∑F is the sum of the vertical external loads acting on the half-ball valve 3, and ∑M is the sum of the moments of the external loads about any point on the half-ball valve 3.

[0043] In this embodiment, referring to Figure 1 and Figure 4 , as a preferred design, it further includes a cover plate 6 provided at the top orifice of the access hole. The cover plate 6 can be made of fiberglass to prevent dirt from entering the access hole. The cover plate 6 only serves as a cover and does not play a plugging role. Therefore, no further sealing treatment is required.

[0044] As can be seen from the above, the ball valve type plugging device in this embodiment has a simple structure and novel design. Its innovation points are reflected in four aspects. First, the form of components is innovative, with the funnel-shaped plug hole 2 cooperating with the half-ball valve 3. Second, it changes the traditional external plugging with a flat plate to internal plugging with a half-ball valve. Third, the water-stop form is innovative, changing the traditional rubber strip water-stop to surface water-stop formed by the components themselves. Fourth, it makes good use of the water pressure, converting "resistance" into "utilization", that is, converting the commonly used resistance to water pressure in the past into utilization of water pressure. Compared with the commonly used waterproof cover plates at present, there is no need to apply external force for water-stop. The half-ball valve uses the water pressure to form plugging and water-stop, with strong anti-seepage ability, thus overcoming the defects of the current waterproof cover plates being prone to leakage and requiring external force to resist water pressure. It has the characteristics of simple structure, practicality, good anti-seepage effect, and easy maintenance, and has broad application prospects.

[0045] In summary, the present invention effectively overcomes various defects in the prior art and has high industrial utilization value.

[0046] The above embodiments are only illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A ball valve type plugging device for a runner access hole, which is used to plug or open the access hole opened in the top plate (1) of the runner. It is characterized in that: The lower section of the access hole is a plugging hole (2), the plugging hole (2) is in a circular funnel shape and its diameter gradually increases from top to bottom, and the hole wall of the plugging hole (2) is smooth to form a plugging surface (2a); the ball valve type plugging device includes a hemispherical valve (3) arranged in the plugging hole (2), a hinge member for hinging the hemispherical valve (3) on the hole wall of the plugging hole (2), and a locking mechanism arranged between the hemispherical valve (3) and the top plate (1) of the runner. The hemispherical valve (3) can enter or exit the plugging hole (2) upward. The spherical surface (3a) of the hemispherical valve (3) faces upward and its radius is greater than the radius of the upper port of the plugging hole (2). The locking mechanism is used to lock the hemispherical valve (3) in the plugging hole (2) so that a tight contact is formed between the spherical surface (3a) and the plugging surface (2a) to form a seal; the inside of the hemispherical valve (3) is hollow; the hinge member is a hinge (4), one end of the hinge (4) is hinged at the bottom side of the hemispherical valve (3), and the other side is hinged on the hole wall of the plugging hole (2); it also includes a lifting structure arranged on the upper part of the hemispherical valve (3), and the lifting structure is used for personnel to operate the hemispherical valve (3) to enter or exit the plugging hole (2); the lifting structure includes a chain (5) with one end hinged on the hemispherical valve (3), the other end of the chain (5) extends out of the access hole, and the hinge points of the chain (5) on the hemispherical valve (3) and the hinge (4) are respectively on opposite sides of the hemispherical valve (3); the locking mechanism includes a locking seat (7) arranged on the top plate (1) of the runner and beside the top hole of the access hole, and the chain (5) passes through the locking seat (7) and can be locked in the locking seat (7); when the hemispherical valve (3) enters the plugging hole (2) and contacts, the bottom plane (3b) of the hemispherical valve (3) is flush with the bottom of the top plate (1) of the runner; it also includes a cover plate (6) arranged at the top hole of the access hole.

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