JP3207086U - Pressure type water level gauge - Google Patents

Abstract

A pressure-type water level meter suitable for use in a horizontal position is provided. A main body 6 having a cylindrical appearance, having a sensor pressure-receiving surface 5 on one end side, used in a horizontal orientation, and a head 7 having a base end portion detachably attached to one end side of the main body 6 is provided. The outer surface of the portion excluding the base end portion of the head 7 is pointed toward the distal end side, the bottom surface portion, two symmetric concave surface portions 11, and a ridge portion located at the boundary between the two concave surface portions 11. The two concave surface portions 11 and the ridge portion 12 extend away from the bottom surface portion from the distal end of the head 7 toward the base end, and have a step portion 13 in the middle thereof. The portion from 13 to the tip of the head 7 is configured such that the angle formed with the bottom surface portion is more acute than the portion extending from the step portion 13 to the rear end side of the head 7. [Selection] Figure 2

Description

  The present invention relates to, for example, a pressure type water level meter for measuring the level of sewage flowing through a sewage pipe.

  Most of the conventional pressure type (hydraulic pressure type) water level gauges are used in a vertical position (a state oriented in the vertical direction). By the way, if this type of water level gauge is immersed in sewage flowing through the sewage pipe with the water level gauge oriented in the vertical direction, a large force is applied to the water level gauge by the water flow. A large-scale device is required to hold Therefore, it is conceivable to use a vertically installed pressure type water level meter in a horizontal position (horizontal).

  However, when a vertically installed pressure type water level gauge is used horizontally, not only the hydrostatic pressure but also the pressure (dynamic water pressure) due to the water flow is applied to the sensor pressure-receiving surface, which causes an error.

  The present invention has been made in consideration of the above-mentioned matters, and an object of the present invention is to provide a pressure-type water level meter suitable for horizontal use.

  In order to achieve the above object, a pressure-type water level meter according to the present invention has a cylindrical appearance, has a sensor pressure receiving surface on one end side, and a main body used in a horizontal position, and on the one end side of the main body. A head having a base end portion that is detachable, and an outer surface of a portion excluding the base end portion of the head is sharpened toward a tip end side, a bottom surface portion, two symmetrical concave surface portions, and A ridge portion located at the boundary between the two concave surface portions, and the two concave surface portions and the ridge portion extend away from the bottom surface portion toward the base end from the distal end of the head, and in the middle thereof The portion from the step portion to the tip of the head is configured such that the angle formed with the bottom surface portion is more acute than the portion extending from the step portion to the rear end side of the head. (Claim 1).

  In the pressure-type water level gauge, the head may be detachably attached to the other end of the main body.

  In the pressure-type water level gauge, a cone-shaped head may be detachably attached to the other end of the main body.

  In the present invention, a pressure-type water level meter suitable for horizontal use can be obtained.

  That is, in the pressure type water level gauge of the device according to each claim of the present application, the water flowing toward the pressure type water level gauge can be obtained by installing the head on the upstream side of the main body (sensor pressure receiving surface). Divided into two left and right by two concave parts, the influence of hydrodynamic pressure on the sensor pressure receiving surface can be made as small as possible, and the head has a front and rear two-stage structure with a more acute angle on the front side of the step part Since the contact angle of the front portion with respect to the water flow can be made acute and the resistance to the water flow can be lowered, it is suitable for use in a horizontal orientation.

It is explanatory drawing which shows roughly the structure of the use condition of the pressure type water level gauge which concerns on one embodiment of this invention. It is a perspective view which shows the structure of the said pressure type water level gauge roughly. (A)-(E) are the side view, front view, top view, back view, and bottom view which show schematically the structure of the streamlined head of the said pressure type water level gauge. (A) And (B) is the perspective view seen from the slanting back which shows roughly the composition of the stream type head of the above-mentioned pressure type water level gauge, and the perspective view seen from the slanting top. (A) And (B) is the front view and side view which show roughly the structure of the cone-shaped head of the said pressure type water level gauge.

  Embodiments of the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the pressure type water level gauge 1 according to the present embodiment is used by being attached to a mount (mounting base) 3 installed in a water channel (for example, a sewer pipe) 2 having a circular longitudinal section.

  First, the mount 3 is formed of a material having corrosion resistance and rust resistance (for example, a metal such as stainless steel), and has a shape in which the longitudinal section is substantially arc-shaped and the upper part is notched (opened). The mount 3 is inserted into the water channel 2 in a state of being elastically deformed in the diameter reducing direction, and is pressed against the inner wall of the water channel 2 by a restoring force acting in the diameter increasing direction after the insertion, thereby being fixed to the water channel 2 It becomes. When the mount 3 is removed from the water channel 2, the mount 3 may be elastically deformed in the reduced diameter direction using the two gripping portions 4 extending from both open ends toward the lower side (inner side). 2 is detachable on the inner wall.

  And the pressure type water level gauge 1 is attached to the lower upper surface of the mount 3. As shown in FIG. 2, the pressure type water level gauge 1 has a cylindrical appearance, has a sensor pressure-receiving surface 5 on one end side, a main body 6 used in a horizontal orientation, and a base end portion on one end side of the main body 6. A streamlined head 7 having a length of about 8 cm from which 7 a can be attached and a cone-shaped head 8 having a length of about 3 cm from which the other end of the main body 6 can be attached and detached (see also FIGS. 5A and 5B). And the head 7 is installed on the upstream side and the head 8 is installed on the downstream side.

  The main body 6 accommodates a battery, a memory, a base, a sensor, and the like (not shown), and is configured to be able to transmit and receive data by removing the head 8 and connecting a communication cable.

  As shown in FIGS. 3 (A) to 3 (E), FIGS. 4 (A) and 4 (B), the outer surface of the portion excluding the base end portion 7a of the head 7 is pointed toward the distal end side, and the bottom surface portion 9 and , Two symmetric concave surface portions 10 and 11 and a ridge portion 12 located at the boundary between the two concave surface portions 10 and 11. The two concave surface portions 10 and 11 and the ridge portion 12 extend away from the bottom surface portion 9 from the tip end of the head 7 toward the base end, and have a step portion 13 in the middle thereof. The portion from the head 7 to the tip of the head 7 is configured such that the angle formed with the bottom surface portion 9 is more acute than the portion extending from the step portion 13 to the rear end side of the head 7.

  Further, as shown in FIG. 3 (E), the bottom surface portion 9 is provided with two screw holes 14, and by screwing a screw member (not shown) penetrating the lower part of the mount 3 up and down into the screw hole 14. The head 7 and thus the pressure type water level gauge 1 is attached to the mount 3. A step 7 b corresponding to the thickness of the mount 3 is provided on the lower surface of the head 7 so that the pressure-type water level gauge 1 attached to the mount 3 can follow the inner wall surface of the water channel 2. (See FIG. 3A).

  Further, male screws (not shown) are provided at both ends of the main body 6, and as shown in FIGS. 3D and 4A, the base 7 of the head 7 is screwed to the male screws of the main body 6. A possible internal thread 15 is provided. Note that a female screw (not shown) that can be screwed onto the male screw of the main body 6 is also provided at the base end of the cone-shaped head 8.

  Here, when the pressure type water level gauge 1 is viewed from one end side (head 7 side), the main body 6 and the head 8 are completely hidden behind the head 7 and are screwed to the mount 3. When the male screw of the main body 6 is unscrewed from the female screw 15, the main body 6 and the head 8 do not interfere with the inner wall surface of the water channel 1, so that the head 7 remains attached to the mount 3 with respect to the head 7. Thus, the main body 6 and the head 8 can be attached and detached.

  The pressure-type water level gauge 1 having the above-described configuration is configured so that the head 7 located on the upstream side of the main body 6 (sensor pressure-receiving surface 5) allows the water flowing toward the pressure-type water level gauge 1 to have two concave surface portions 10 and 11. Therefore, the influence of hydrodynamic pressure on the sensor pressure-receiving surface 5 can be reduced as much as possible, and the head 7 has a front and rear two-stage structure with a more acute angle on the front side of the step portion 13. Since the contact angle of the front portion with respect to the surface can be made acute and the resistance to water flow can be reduced, it is suitable for use in landscape orientation.

  It should be noted that the present invention is not limited to the above-described embodiment, and can be variously modified and implemented without departing from the gist of the present invention. For example, the following modifications can be given.

  The head 7 provided on the upstream side of the main body 6 may have a shape that can smoothly flow the water around the sensor pressure-receiving surface 5 without splashing the flowing water even when the flow rate is large, and is shown in the above embodiment. Other shapes may be used.

  The head 8 provided on the downstream side of the main body 6 only needs to have a shape in which Karman vortices that adversely affect the sensor unit such as vibration and fatigue are not easily generated. In the above embodiment, the cone-shaped head 8 is used. However, other shapes may be used, for example, not only one end side (upstream side) of the main body 6. A streamlined head 7 may be detachably attached to the other end side (downstream side).

  The mount 3 is not limited to the one having the configuration shown in FIG. 1, and mounts having various configurations can be used. That is, the mount 3 shown in FIG. 1 is suitable for the small-diameter water channel 2 having a diameter of about 200 to 450 mm, and the mount 3 suitable for the diameter and environment of the water channel 2 may be used. A mount (mainly a water channel 2 having a medium diameter of 500 to 800 mm), in which a turnbuckle is further provided between the two grip portions 4 of the mount shown in FIG. Suitable for use) and a rectangular plate-shaped mount that is fixed to the wall surface of the channel 2 with screws or anchors at two diagonal points (mainly suitable for the channel 2 having a large diameter of 900 mm or more). It is.

  Needless to say, the above modifications may be combined as appropriate.

DESCRIPTION OF SYMBOLS 1 Pressure type water level gauge 2 Water channel 3 Mount 4 Gripping part 5 Sensor pressure receiving surface 6 Main body 7 Head 7a Base end part 7b Step 8 Head 9 Bottom face part 10 Concave part 11 Concave part 12 Ridge part 13 Step part 14 Screw hole 15 Female screw

Claims (3)

Presenting a cylindrical appearance, having a sensor pressure receiving surface on one end side, and a main body used in landscape orientation,
A head having a detachable base end on the one end side of the main body;
The outer surface of the portion excluding the base end portion of the head is pointed toward the distal end side, and has a bottom surface portion, two symmetrical concave surface portions, and a ridge portion located at the boundary between the two concave surface portions. And
The two concave surface portions and the ridge portion extend away from the bottom surface portion toward the base end from the tip end of the head, and have a step portion in the middle thereof, from the step portion to the tip end of the head. The portion is configured such that an angle formed with the bottom surface portion is more acute than a portion extending from the step portion toward the rear end side of the head.   The pressure-type water level meter according to claim 1, wherein the head is also detachably attached to the other end side of the main body. The pressure-type water level meter according to claim 1, wherein a cone-shaped head is detachably attached to the other end of the main body.