阅读说明：本技术 一种安全阀 (Safety valve ) 是由 张炳星 于 2020-04-26 设计创作，主要内容包括：本发明公开了一种安全阀,包括阀壳,所述阀壳中设置有弹簧,所述弹簧的两端分别设置有第一弹簧座和第二弹簧座,所述第一弹簧座连接有阀瓣,所述第一弹簧座和所述阀瓣之间设置有第一钢球；所述第二弹簧座连接有调节螺钉,所述第二弹簧座和所述调节螺钉之间设置有第二钢球。本发明将原有的顶尖传递力的形式,改为通过钢球传递力的形式,利用钢球的球面受力的万向性的特点将零件精度误差的产生的水平分力互相抵消,只是将轴向分力传递给阀瓣。(The invention discloses a safety valve, which comprises a valve shell, wherein a spring is arranged in the valve shell, a first spring seat and a second spring seat are respectively arranged at two ends of the spring, the first spring seat is connected with a valve clack, and a first steel ball is arranged between the first spring seat and the valve clack; the second spring seat is connected with an adjusting screw, and a second steel ball is arranged between the second spring seat and the adjusting screw. The invention changes the original center force transmission form into the steel ball force transmission form, and utilizes the universal characteristic of the spherical surface stress of the steel ball to offset the horizontal component force generated by the precision error of the part, and only transmits the axial component force to the valve clack.)

1. A safety valve comprises a valve casing (4), wherein a spring (5) is arranged in the valve casing (4), and a first spring seat (2) and a second spring seat (6) are respectively arranged at two ends of the spring (5), and the safety valve is characterized in that the first spring seat (2) is connected with a valve clack (3), and a first steel ball (9) is arranged between the first spring seat (2) and the valve clack (3); the second spring seat (6) is connected with an adjusting screw (7), and a second steel ball (10) is arranged between the second spring seat (6) and the adjusting screw (7).

2. Safety valve according to claim 1, characterized in that the adjusting screw (7) is provided with a lock nut (8).

3. Safety valve according to claim 1, characterized in that a valve seat (1) is connected to the valve housing (4).

4. Safety valve according to claim 1, characterized in that the valve housing (4) is provided with a vent.

5. Safety valve according to claim 1, characterized in that a sealing ring (11) is arranged between the valve housing (4) and the valve seat (1).

6. Safety valve according to claim 1, characterized in that a clamping ring (12) is arranged between the sealing ring (11) and the valve housing (4).

7. Safety valve according to claim 1, characterized in that the valve housing (4) is provided with a set screw (13).

Technical Field

The invention relates to the field of valve bodies, in particular to a safety valve.

Background

The prior structure of the micro-open type safety valve without the regulating ring generally has two structural forms of figure 3 and figure 4, the safety valve with the structure of figure 3 is generally used in occasions needing to recover media, and the safety valve with the structure of figure 4 is used in occasions needing not to recover media. As shown in fig. 6-7, the accumulated manufacturing errors of the components determine that the valve flap is not only acted by the axial component Piz but also acted by the horizontal component Pix after the assembly of the prior structure, and the size of the horizontal component Pix depends on the manufacturing accuracy of the spring, the valve flap, the spring seat and the like, and the horizontal component Pix directly influences the sealing effect and the debugging stability.

An effective solution to the problems in the related art has not been proposed yet.

Disclosure of Invention

In view of the above technical problems in the related art, the present invention provides a safety valve, which can solve the above problems.

In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:

a safety valve comprises a valve shell, wherein a spring is arranged in the valve shell, a first spring seat and a second spring seat are respectively arranged at two ends of the spring, the first spring seat is connected with a valve clack, and a first steel ball is arranged between the first spring seat and the valve clack; the second spring seat is connected with an adjusting screw, and a second steel ball is arranged between the second spring seat and the adjusting screw.

Furthermore, a lock nut is arranged on the adjusting screw.

Further, a valve seat is connected to the valve housing.

Further, an air outlet is formed in the valve casing.

Further, a sealing ring is arranged between the valve casing and the valve seat.

Further, a compression ring is arranged between the sealing ring and the valve casing.

Further, a set screw is arranged on the valve shell.

The invention has the beneficial effects that:

1. the invention changes the original center force transmission form into the steel ball force transmission form, and utilizes the universal characteristic of the spherical surface stress of the steel ball to offset the horizontal component force generated by the precision error of the part, and only transmits the axial component force to the valve clack.

2. The invention greatly reduces the manufacturing precision of the main parts of the safety valve, reduces the time for assembling and debugging the safety valve, improves the stability of the product, and comprehensively saves the cost by more than 20 percent and the stability of the product by more than 20 percent.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a first schematic view of the safety valve of the present embodiment;

FIG. 2 is a second schematic view of the safety valve of the present embodiment;

FIG. 3 is a schematic view of a first construction of a prior art relief valve;

FIG. 4 is a schematic view of a second construction of a prior art relief valve;

FIG. 5 is a schematic illustration of spring manufacturing accuracy geometric tolerances;

FIG. 6 is a schematic view of a prior art valve flap being stressed;

FIG. 7 is a schematic view of a prior art valve flap valve seat force;

FIG. 8 is a schematic diagram of the valve flap of the modified embodiment;

FIG. 9 is a schematic view of the force applied to the valve flap and the first spring seat after the modification of the present example;

in the figure: 1. the valve comprises a valve seat, 2 parts of a first spring seat, 3 parts of a valve clack, 4 parts of a valve shell, 5 parts of a spring, 6 parts of a second spring seat, 7 parts of an adjusting screw, 8 parts of a lock nut, 9 parts of a first steel ball, 10 parts of a second steel ball, 11 parts of a sealing ring, 12 parts of a pressing ring and 13 parts of a set screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

As shown in fig. 1-2, a safety valve according to an embodiment of the present invention includes a valve housing 4, a spring 5 is disposed in the valve housing 4, a first spring seat 2 and a second spring seat 6 are disposed at two ends of the spring 5, respectively, the first spring seat 2 is connected to a valve flap 3, and a first steel ball 9 is disposed between the first spring seat 2 and the valve flap 3; the second spring seat 6 is connected with an adjusting screw 7, and a second steel ball 10 is arranged between the second spring seat 6 and the adjusting screw 7.

In one embodiment of the invention, the adjusting screw 7 is provided with a lock nut 8.

In a particular embodiment of the invention, a valve seat 1 is connected to the valve housing 4.

In one embodiment of the invention, the valve housing 4 is provided with an air outlet.

In a particular embodiment of the invention, a sealing ring 11 is arranged between the valve housing 4 and the valve seat 1.

In a specific embodiment of the invention, a compression ring 12 is arranged between the sealing ring 11 and the valve housing 4.

In a particular embodiment of the invention, the valve housing 4 is provided with a set screw 13.

In order to facilitate understanding of the above-described technical aspects of the present invention, the above-described technical aspects of the present invention will be described in detail below in terms of specific usage.

When the safety valve is used in concrete, medium pressure at the inlet end acts on the end face of the valve clack 3, when the medium pressure is larger than the elastic force of the spring 5, the valve clack 3 moves upwards, a gap is formed between the sealing surface of the valve clack 3 and the valve seat 1, and the medium begins to be discharged. As the discharge increases and the pressure in the container or pressure line decreases, the force of the spring 5 on the flap 3 is greater than the force of the medium on the flap 3, and the flap 3 slowly begins to fall back until the flap 3 completely closes the seal. The pre-tightening force of the spring 5 can be changed through the adjusting screw 7, so that different pressures can be set.

As shown in fig. 5-7, the existing safety valve has high requirements for the manufacturing accuracy of the spring, and the parallelism of the upper end surface and the lower end surface of the spring and the straightness of the height dimension all affect the stability of the sealing and the stability of the debugging accuracy; and the precision requirement of parts is high, and the processing cost is high. As shown in FIGS. 8-9, the invention cancels the horizontal component force generated by the precision error of the parts by the universal characteristic of the stress of the first steel ball 9 and the second steel ball 10, and only transmits the axial component force to the valve flap.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.