JPH04126071U - Anza check valve - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to improve the conformability of the valve seat of a check valve used in a water jet loom. [Structure] A soft material is used for the valve seat, the tightening force of the nipple that fixes the valve seat is limited to suppress the valve seat pressing pressure, and the nipple is firmly fixed to the valve. Provide the member. [Effect] If a soft material is used for the valve seat, it will fit better. At this time, even if the nipple cannot be tightened sufficiently to avoid crushing the soft valve seat, the fixed member prevents the nipple from retreating when water pressure increases, preventing backflow.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a seated check valve in which the check ball is seated well. Can be used as a pressure accumulator for water jet rooms.

0002

[Conventional technology]

Usually, in a water jet loom, the steel ball is shaped like a ring with a coil spring. A check valve that is pressed against the valve seat (see Figure 4) or a coil coil A type of check valve in which the steel ball is pressed against the valve seat by its own weight without using a puller. It is installed in the pressure accumulation device of the jet water to prevent backflow in the device, but due to the manufacturing of the loom. Increasing the weaving speed inevitably increases the number of injections per unit time, which increases the flow tolerance and The movement of the rejected steel ball became too frequent, and finally the valve blockage could no longer follow the injection. This will cause backflow. This backflow reduces the injection pressure and reduces the weft flying speed. This may cause negative effects such as weft insertion errors.

0003 Therefore, as a result of repeated research by the inventor of the present invention, the followability of valve occlusion was determined by the pressure of the steel ball. It has become clear that it depends not only on the force, but also on the compatibility between the steel ball and the valve seat. Ta. However, originally, valve seats were used under conditions of severe wear and maintenance. Since it is a product and requires high mass production, even with current production technology, it is difficult to It is difficult to manufacture a valve seat that has good compatibility with steel balls and has high adhesion. It is difficult. Therefore, currently, steel balls and valve seats are manufactured with poor compatibility. , has no choice but to be shipped. However, conveniently, a new valve seat and steel ball Even if the compatibility is low at first, the valve seat will gradually become worn out with repeated use. It became more compatible and gradually became less likely to cause regurgitation.

0004 Therefore, the inventor chose a relatively soft and easily abraded material for the valve seat. However, it was assumed that the compatibility between the valve seat and the steel ball would quickly increase. However, currently The valve seat is inserted into the front of the steel ball through the exchange port, and then screwed into the rear exchange port. The valve seal is made of a soft material and is fastened by being strongly pressed with a pull. If you use the valve seat, the valve seat will be crushed by the nipple, and By reducing the pressure on the nipple to prevent the valve seat from collapsing, the water pressure will increase. When the valve is raised, the nipple retracts, creating a gap around the valve seat, allowing water to flow backwards. For this reason, valve seat materials are now made of extremely high quality materials such as stainless steel and copper. Only hard materials could be used.

[0005]

[Problem that the idea aims to solve]

However, current hard material valve seats do little to improve compatibility with steel balls. It takes too much time to achieve this goal, so it is important to proactively promote compliance faster. is necessary. Therefore, in this invention, achieving this is a technical challenge. shall be.

[0006]

[Means to solve the problem]

The inventor believes that the reason why the nipple retreats when the water pressure increases is because the conventional nipple fixation is insufficient. I thought it was because it was perfect. Therefore, by limiting the force of the nipple pushing against the valve seat, After using a relatively soft material for the seat, a fixing member is installed to make the nipples stronger. By adopting the fixing method, the compatibility between the valve seat and the steel ball can be quickly increased. I decided to do so.

[0007]

【Example】

Hereinafter, the present invention will be explained based on first and second embodiments shown in the drawings. In addition, both examples The check valve is also a type used on the introduction side to the pressure storage tank, but the reason for this is that the introduction This is because the side receives greater pressure when the valve is closed than the water outlet side.

[0008] In the first embodiment of the present invention shown in FIG. has been adopted. This fixing member 5 is a needle that is screwed into the female thread of the valve frame 1. It is screwed into the male thread of the nipple 4 to strengthen the fastening of the nipple 4. On the other hand, nipple 4 In this example, a hard resin valve seat 3 is placed in front of the steel ball 2 which is biased by a coil spring. Press and fix with a certain pressing force. Furthermore, the nipple 4 itself is a passageway for jetting water. It communicates with the injection water supply source and introduces the injection water into a pressure storage tank (not shown). The sea urchin is turning.

[0009] On the other hand, in the second embodiment shown in FIGS. 2 and 3, the fixing member 5 is Fasteners are used. This fixing member 5 is a valve frame 1 to which the nipple 4 is screwed. Tighten the split end of the nipple 4 to make the nipple 4 firmly fastened. On the other hand, nipple 4 As in the first embodiment, a hard resin valve seat 3 is placed in front of the energized steel ball 2. In addition to being fixed by the pressing force of the It communicates with the source and introduces the jetted water into a pressure storage tank (not shown).

0010 Although the present embodiment is as described above, the present invention is not limited to the above embodiment. Instead, the fixing member of this invention is a set screw, etc. that fixes the valve frame and nipple. It is also possible to adopt

[0011]

[Effect of the idea]

As described above, according to the present invention, the pressing force applied to the valve seat is limited and the pressure applied to the valve seat is limited. Since it is now possible to completely fix the valve, a relatively soft material can be used on the valve seat. The valve seat and the steel ball can be matched quickly. death Therefore, this check valve is superior to conventional products and has high industrial value.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a first embodiment.

FIG. 2 is a vertical cross-sectional view of the second embodiment.

FIG. 3 is a horizontal sectional view of the second embodiment.

FIG. 4 is a partially enlarged sectional view of the water jet loom.

[Explanation of symbols]

1 Valve frame 2 Steel ball 3 Valve seat 4 Nipple 5 Fixed member

Claims (1)

[Scope of utility model registration request] Claim 1: A check valve that prevents backflow by pressing a ball against a valve seat inside the valve, the valve seat having an annular valve seat made of a material with lower rigidity than metal. When used, the valve seat is fastened to a predetermined position within the valve by a nipple with a pressing force that is not crushed, and the nipple is firmly fixed to the valve body by a fixing member. A seated check valve characterized by: