JPH0447506Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a mounting structure for a valve having a jacket on the outside of the valve body for heating, cooling, or keeping the temperature of fluid within the valve.

BACKGROUND ART An example of a conventional jacketed valve is Utility Model Publication No. 49-5289. As shown in FIG. 5, this valve has a connecting hole 16 with a piping flange via a bolt 15 provided on the outside of the jacket.

Problems to be solved by the invention In order to make it easier to tighten the conventional jacketed valve piping flange and the valve, the pitch circle diamond of the bolt is provided far outside the jacket, so the valve flange The diameter of the part became larger, the weight increased, and it was difficult to manufacture.

The present invention aims to solve the above-mentioned difficulties, miniaturize the product, and prevent the occurrence of casting defects.

Means for Solving the Problems In order to achieve the above object, the present invention provides a through hole in the valve box flange portion corresponding to the piping flange portion, and allows a short pipe with or without a thread groove on the inner periphery to pass through the hole. A short pipe is inserted into a jacket through a hole, and both ends of the short pipe are integrally formed with the valve box flange to form a fastener attachment part that fixes the piping flange and the valve box. By passing fasteners such as bolts and nuts through the flange portion and the short pipe, the valve box flange portion and the piping flange portion can be connected and fixed. Further, it is also possible to provide a structure in which thread grooves are provided on the inner peripheral side of both ends of the short tube, and the short tube is fixed with bolts from both sides.

Function In the jacketed valve configured as described above, the fastener for connecting the valve body flange and piping flange is installed on the inside of the jacket instead of on the outside, so the flange diameter of the valve can be reduced. By providing a thread groove in the short pipe, the connection between the valve box flange and the piping flange can be fixed with two bolts from both sides of the short pipe.
Alternatively, it is possible to penetrate and fix the valve from one direction at a time using a set of bolts and nuts, so that the fixing work can be done depending on the location where the valve is used.

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 and 2.

1 is a valve box, 2 is a valve box flange, 3 is a valve body attached to the valve box 1 via a valve seat 4, 5 is a piping flange corresponding to the valve box flange 2, 6 is a fluid passage,
7 is a jacket through which cooling or heating fluid flows, and 8 is a short pipe, which is inserted through the jacket 7 by being pushed into the through holes provided in the valve box flange portions 2 on both sides corresponding to the connection holes of the piping flange portion 5. There is.

9 is a welded portion between the short pipe 8 and the valve box flange portion 2. Reference numeral 10 indicates a bolt, which connects a connecting hole and a short pipe 8 provided in the piping flange portion 5 on the upstream side and downstream side of the fluid passage 6.
The piping flange portion 5 and the valve box flange portion 2 are fixed by passing through and tightening with nuts.

FIG. 3 shows another embodiment, in which a short pipe 11 having an internal thread groove is passed through the jacket 7, and both ends are welded to the valve box flange part 2. When connecting to the piping flange portion 5, the upstream flange portion and the downstream flange portion of the fluid passage are screwed together using separate bolts 12, 12, respectively.

Normally, the thickness of the bolt for connecting the valve is determined depending on the size of the valve, but the above-mentioned grooved short pipe 1
If an attempt is made to insert the long bolt used in FIG. 1 into the short tube 11, it will come into contact with the groove on the inner periphery of the short tube 11, making it impossible to fix it with a single long bolt.

The fourth example deals with such a case.
Show the diagram.

When fixing the valve shown in Figure 4 to the piping flange, connect it with one bolt or
You can choose to connect with two bolts.

That is, the diameter of the short tube 13 is wider than the diameter of a ready-made bolt, and thread grooves are formed on the inner periphery of both ends of the short tube 13. Reference numeral 14 denotes a threaded part having thread grooves on the inner and outer peripheries, the inner periphery side having a diameter that can be screwed into a ready-made bolt, and the outer periphery side capable of being screwed into grooves at both ends of the short pipe 13.

When connecting the valve and piping flange with a single long bolt, pass through the hole in the piping flange and the short pipe 13, which has a larger diameter than the ready-made bolt, and tighten the end of the bolt with a nut. Can be fixed. In addition, when inserting and fixing bolts from the upstream and downstream sides of the fluid passage,
After screwing the threaded parts 14 into the threaded grooves at both ends of the short tube 13 and forming threaded grooves that match the diameter of the bolt,
Can be connected to piping flange.

The jacketed valve configured as described above has a short pipe for attaching the fastening parts to the piping flange inside the jacket, and does not require an occupied part on the outside of the jacket for tightening the bolts, resulting in a product that is smaller and smaller. ,
Weight reduction can be achieved. In addition, piping flanges on the upstream and downstream sides of the fluid can be fixed simultaneously with a single bolt and nut, and by using a short pipe with threaded grooves, bolts can be inserted and fixed from both sides. Therefore, we recommend using short pipes with threaded grooves, short pipes without threaded grooves, and short pipes that allow you to change the diameter of the threaded groove as needed. Depending on the situation, the one that is easy to install can be selected and used.

Effects of the invention In the present invention, as described above, the short tube for inserting the fastener is passed through and fixed in the jacket, so there is no need to form an occupied part on the outside of the jacket for attaching the fastener. The diameter of the flange becomes smaller, which allows the product to be made smaller and lighter, and since the short tube serves to reinforce the flange, the thickness of the flange can be made thinner, reducing casting defects. Manufacturing becomes easier. Furthermore, it has practical effects such as being able to use valves that are easy to install.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a state in which a jacketed valve according to the present invention is installed, partially in section. Second
The figure is a sectional view taken along the line A-O-B in FIG. 1, FIGS. 3 and 4 are sectional views of main parts showing other embodiments, and FIG. 5 is a sectional view showing a conventional example. 1... Valve box, 2... Valve box flange portion, 3... Valve body, 5... Piping flange, 7... Jacket,
8, 11, 13... Short pipe, 10, 12... Bolt, 14... Screw parts.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A through hole is provided in the valve box flange portion corresponding to the piping flange portion, and a short pipe with or without a thread groove on the inner periphery is inserted into the jacket through the through hole. 1. A valve with a jacket, characterized in that a fastener attachment part is formed for fixing a piping flange part and a valve box by inserting the short pipe and integrally forming both ends of the short pipe with the valve box flange part. (2) The short pipe according to claim 1, wherein a threaded part having thread grooves on the inner and outer peripheries and a diameter of the inner periphery to be threaded into a ready-made bolt is removably screwed into both ends of the short pipe. Valve with jacket.