Unit gas flow control valve

Abstract

The utility model discloses a unit gas flow control valve, the outer side of the control valve is sleeved with a protective shell formed by splicing an upper shell and a lower shell, and the inner sides of the two ends of the protective shell are respectively in threaded connection with an abutting sleeve formed by splicing two abutting half sleeves. The abutting sleeve abuts against the flange on the gas pipeline towards the direction of the flange on the control valve, and a gas leakage monitoring piece is arranged on the upper shell or the lower shell. The protection shell is arranged to protect the control valve, the service life of the control valve is prolonged, as the abutting sleeve abuts against one side of the flange arranged on the gas pipeline, when the abutting sleeve is screwed to move towards the interior of the protection shell, the gas pipeline can be tightly attached to an inlet and an outlet of the control valve, and installation of the control valve and the gas pipeline is completed; compared with an existing installation mode, the number of used screws is reduced, convenience is brought to installation, maintenance and disassembly, and the safety performance of the control valve during use is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas valve technical field, concretely relates to a kind of unit gas flow control valve. BACKGROUND

[0002] The working principle of gas control valve is based on the relative position change between valve core and valve seat to control the flow area of gas, so as to realize the control of gas flow and pressure. When the opening between valve core and valve seat increases, the cross-sectional area of gas passing increases, and the flow increases, while the pressure loss decreases. Conversely, when the opening decreases, the flow decreases, and the pressure loss increases.

[0003] The existing gas control valve and the corresponding gas pipeline are connected and fixed by bolt and nut cooperation, but such connection mode is more troublesome, and needs the locking cooperation of multiple groups of screws and nuts, which brings inconvenience to the installation and maintenance and disassembly of gas control valve. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of unit gas flow control valve to solve the above-mentioned shortcomings in prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of unit gas flow control valve, comprising: control valve, the control valve outside is equipped with the protection shell that is assembled by upper shell and lower shell, the lower shell inner wall bottom is equipped with the recess that is matched with the shape of control valve bottom, the protection shell both ends inside each thread connection has one by two abutting half cover assembled abutting cover, the section of abutting cover is L-shaped, the abutting cover is abutted to the flange on gas pipeline towards control valve upper flange direction, gas leakage monitoring piece is arranged on the upper shell or lower shell.

[0006] Further, the abutting cover is provided with a sealing gasket, and the sealing gasket is located between the abutting half cover and the flange provided on the gas pipeline.

[0007] Further, the gas leakage monitoring piece is a first monitoring piece, the first monitoring piece is sleeved outside the control screw of the control valve, and is fixedly installed on the top of the upper shell by screws, a first circular arc groove is formed in the first monitoring piece for storing gas leakage detection reagent, and a first air hole is formed in the inner circle side of the first monitoring piece and communicated with the circular arc groove.

[0008] Further, the gas leakage monitoring piece is a second monitoring piece, the second monitoring piece is fixedly installed on the bottom of the lower shell, a second circular arc groove is formed in the lower shell for storing gas leakage detection reagent, a third air hole is formed in the bottom of the lower shell, and a second air hole is formed in the second monitoring piece and communicated with the third air hole and the second circular arc groove.

[0009] Further, a through hole is formed on the abutting half cover, and when two abutting half covers are buckled together, the two abutting half covers are locked together by a screw passing through the two through holes to form the abutting cover.

[0010] Further, a vertical rod is fixedly connected to the abutting half cover.

[0011] In the above technical solution, the unit gas flow control valve provided by the utility model has the beneficial effects that:

[0012] The control valve is protected by the protective shell, the service life of the control valve is prolonged, the gas leakage monitoring member is arranged on the upper shell body or the lower shell body, and whether the gas leaks between the gas pipeline and the control valve can be monitored, the use safety is improved, the flange on the gas pipeline is abutted by the abutting cover, when the abutting cover is twisted to move to the inside of the protective shell, the gas pipeline and the inlet and outlet of the control valve are tightly attached, the installation of the control valve and the gas pipeline is completed, compared with the existing installation mode, the number of screws is reduced, the installation and maintenance and disassembly are convenient, and the safety performance of the control valve during use is improved.

[0013] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, rather than intended to limit the disclosure.

[0014] This application file provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the utility model, and other drawings can be obtained by those skilled in the art according to these drawings.

[0016] Figure 1 The structural schematic diagram provided by the utility model embodiment is shown in the figure.

[0017] Figure 2 The expanded structural schematic diagram provided by the utility model embodiment is shown in the figure.

[0018] Figure 3 The expanded structural schematic diagram provided by the utility model embodiment is shown in the figure. Figure 1 The enlarged view of A in the figure.

[0019] Figure 4 The expanded structural schematic diagram provided by the utility model embodiment is shown in the figure. Figure 2 The enlarged view of B in the figure.

[0020] Explanation of reference signs:

[0021] 1. control valve; 2. upper shell; 22. round hole; 3. abutting half sleeve; 31. through hole; 32. vertical rod; 4. sealing gasket; 5. first monitoring member; 51. first air hole; 52. first circular arc groove; 6. second monitoring member; 61. second air hole; 62. second circular arc groove; 7. lower shell; 71. third air hole; 72. groove. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions and superiorities of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present disclosure.

[0023] Please refer to Figures 1-4 A machine set gas flow control valve, comprising: a control valve 1, the control valve 1 is sleeved with a protective shell which is assembled by an upper shell 2 and a lower shell 7, the upper shell 2 and the lower shell 7 are fixedly connected through screws, a groove 72 matched with the shape of the bottom of the control valve 1 is formed in the inner wall of the bottom of the lower shell 7, two abutting sleeves each assembled by two abutting half sleeves 3 are threadedly connected to the inner sides of the two ends of the protective shell, the cross section of the abutting sleeve is L-shaped, the abutting sleeve abuts the flange on the gas pipeline towards the flange on the control valve 1, and the upper shell 2 or the lower shell 7 is provided with a gas leakage monitoring member.

[0024] Specifically, the control valve 1 is protected by the protective shell, the service life of the control valve 1 is prolonged, the gas leakage monitoring member arranged on the upper shell 2 or the lower shell 7 can be used to monitor whether the gas pipeline and the control valve 1 leak, the safety during use is improved, the flange arranged on the gas pipeline is abutted by the abutting sleeve, when the abutting sleeve is twisted to move towards the inside of the protective shell, the gas pipeline and the inlet and outlet of the control valve 1 are tightly attached, the installation of the control valve 1 and the gas pipeline is completed, compared with the existing installation mode, the number of screws is reduced, the installation and maintenance and disassembly are convenient, and the safety performance during use of the control valve 1 is improved.

[0025] Further, the abutting sleeve is provided with a sealing gasket 4, and the sealing gasket 4 is located between the abutting half sleeve 3 and the flange arranged on the gas pipeline.

[0026] Specifically, referring to Figure 1 and Figure 2 , the sealing gasket 4 is arranged to avoid gas leakage between the abutting sleeve and the flange arranged on the gas pipeline.

[0027] Further, the gas leakage monitoring member is a first monitoring member 5, which is sleeved outside the control screw of the control valve 1 and is fixedly installed on the top of the upper shell 2 by screws. A first circular groove 52 is formed in the first monitoring member 5 for storing a gas leakage detection reagent. A first air hole 51 is formed in the inner side of the first monitoring member 5 and is connected with the circular groove.

[0028] Specifically, the first monitoring member 5 is made of transparent material. When leakage occurs between the gas pipeline and the control valve 1, and the gas density in the gas pipeline is less than that of air, the gas will float and leak out of the protective shell through the circular hole 22. The detection reagent in the first circular groove 52 will react with the gas and change color. The staff can determine whether leakage occurs between the control valve 1 and the gas pipeline according to whether the detection reagent changes color.

[0029] Further, the gas leakage monitoring member is a second monitoring member 6, which is fixedly installed on the bottom of the lower shell 7. A second circular groove 62 is formed in the lower shell 7 for storing a gas leakage detection reagent. A third air hole 71 is formed in the bottom of the lower shell 7. A second air hole 61 is formed in the second monitoring member 6 and is connected with the third air hole 71 and the second circular groove 62.

[0030] Specifically, the second monitoring member 6 is made of transparent material. When leakage occurs between the gas pipeline and the control valve 1, and the gas density in the gas pipeline is greater than that of air, the gas will sink and leak out of the protective shell through the third air hole 71. The detection reagent in the second circular groove 62 will react with the gas and change color. The staff can determine whether leakage occurs between the control valve 1 and the gas pipeline according to whether the detection reagent changes color.

[0031] Further, the abutting half sleeve 3 is provided with a through hole 31. When the two abutting half sleeves 3 are buckled together, the two abutting half sleeves 3 are locked together by screws passing through the two through holes 31 to form an abutting sleeve. The abutting half sleeve 3 is fixedly connected with a vertical rod 32.

[0032] Specifically, referring to Figure 1 and Figure 2 , when the two abutting half sleeves 3 are buckled together, the through holes 31 on the abutting half sleeves 3 are also buckled together. The abutting sleeve is formed by locking and fixing with screws and nuts. The abutting sleeve is sleeved on the gas pipeline. The vertical rod 32 is pulled to make the abutting sleeve rotate on the flange provided on the gas pipeline and be screwed with the protective shell. The abutting sleeve abuts the inlet and outlet of the control valve 1. The installation of the gas pipeline and the control valve 1 is completed.

[0033] The above has only described certain exemplary embodiments of the present application by way of illustration, and it is needless to say that the described embodiments can be modified in various ways without departing from the spirit and scope of the present application for those skilled in the art. Therefore, the above drawings and descriptions are illustrative in nature, and should not be understood as limiting the scope of protection of the claims of the present application.

Claims

1. A unit gas flow control valve, comprising: The control valve (1) is characterized in that: a protective shell composed of an upper shell (2) and a lower shell (7) is fitted on the outside of the control valve (1), and a groove (72) matching the shape of the bottom of the control valve (1) is opened on the bottom of the inner wall of the lower shell (7). A clamping sleeve composed of two clamping half-sleeves (3) is threaded to the inner side of each end of the protective shell. The clamping sleeve has an L-shaped cross section. The clamping sleeve clamps the flange on the gas pipeline towards the upper flange of the control valve (1). A gas leakage monitoring device is provided on the upper shell (2) or the lower shell (7).

2. The unit gas flow control valve according to claim 1, characterized in that, A sealing gasket (4) is provided inside the clamping sleeve, and the sealing gasket (4) is located between the clamping half sleeve (3) and the flange provided on the gas pipeline.

3. The unit gas flow control valve according to claim 1, characterized in that, The gas leak monitoring device is a first monitoring device (5). The first monitoring device (5) is sleeved on the outside of the control screw of the control valve (1) and fixedly installed on the top of the upper housing (2) by screws. The first monitoring device (5) has a first arc groove (52) for storing gas leak detection reagents, and the first monitoring device (5) has a first vent hole (51) connecting the arc groove on the inner circular side.

4. A unit gas flow control valve according to claim 1, characterized in that, The gas leak detection device is a second detection device (6). The second detection device (6) is fixedly installed at the bottom of the lower housing (7). The lower housing (7) has a second arc groove (62) for storing gas leak detection reagent. The bottom of the lower housing (7) has a third vent hole (71). The second detection device (6) has a second vent hole (61) that connects the third vent hole (71) and the second arc groove (62).

5. A unit gas flow control valve according to claim 1, characterized in that, The clamping half sleeve (3) has a through hole (31). When the two clamping half sleeves (3) are fastened together, the two clamping half sleeves (3) are locked together by screws passing through the two through holes (31) to form a clamping sleeve.

6. A unit gas flow control valve according to claim 1, characterized in that, A vertical rod (32) is fixedly connected to the clamping half (3).

Images