Pressure relief pipe of safety valve group and safety valve group

Abstract

The pressure relief pipe comprises a first pressure relief pipe body and a second pressure relief pipe body, the end face of the outlet end of the first pressure relief pipe body is an inclined face, and the included angle between the end face of the outlet end of the first pressure relief pipe body and the axis of the first pressure relief pipe body is 45 degrees. The end face of the inlet end of the second pressure relief pipe is an inclined face, the included angle between the end face of the inlet end of the second pressure relief pipe and the axis of the second pressure relief pipe is 45 degrees, the outlet end of the first pressure relief pipe and the inlet end of the second pressure relief pipe are connected in a rotating fit mode, and a rotating positioning structure is arranged between the outlet end of the first pressure relief pipe and the inlet end of the second pressure relief pipe. The safety valve group comprises a ball valve, a check valve and a safety valve, a medium outlet of the ball valve is connected with a medium inlet of the check valve, one medium outlet of the check valve is connected with a medium inlet of the safety valve, and a pressure relief opening of the safety valve is connected with the pressure relief pipe. The pressure relief pipe can be converted between a straight pipe and a 90-degree right-angle bent pipe, and is suitable for installation and use of a safety valve group under the two conditions that an inlet of the water heater is horizontally and vertically downward.

Description

TECHNICAL FIELD

[0001] The utility model relates to the pressure relief pipe of safety valve group and the safety valve group adopting this pressure relief pipe belong to valve technical field. BACKGROUND

[0002] The safety valve group (usually arranged at the import end side) of the water heater or heating system is composed of multiple valves or has the function of multiple valves. For example, the utility model patent with publication number CN212251326U discloses a water heater safety valve assembly, which comprises a valve body and a handle, the valve body comprises a horizontal valve body and a vertical valve body, a water inlet and a water inlet channel are arranged in the horizontal valve body cavity, a limit check ring is arranged in the horizontal valve body, a check mechanism is installed in the horizontal valve body, the check mechanism comprises a rotating cap, a positioning sheet, a check spring and a check valve core, the check valve core is provided with a spring core and a valve rod, the limit boss limits the spring core, the rotating cap is provided with an anti-blocking filter sheet on one side, a pressure relief channel and a pressure relief pipe are arranged in the vertical valve body, a pressure relief mechanism and an annular abutting convex part are arranged in the pressure relief channel, the pressure relief mechanism comprises a pressure relief valve core and a reset spring, a sealing gasket is arranged on the pressure relief valve core, and an annular recess is arranged on the sealing gasket and abuts against and seals the annular abutting convex part. The safety valve assembly can prevent the elastic force of the check valve core from being damaged, the pressure value is simple and convenient to adjust, the anti-blocking filter sheet can be quickly disassembled and cleaned, the abutting sealing property is strong, and the sensitivity of pressure relief is ensured.

[0003] In the actual installation process of the water heater, due to the influence of the outlet direction of the water heater and the space installation of the pipeline and other factors, the inlet of the water heater can be horizontal or vertically downward, and since the outlet of the pressure relief tail pipe of the safety valve group must be installed vertically downward, it is necessary to prefabricate two kinds of pressure relief tail pipes, one is a straight pipe and the other is a vertical elbow pipe (90° elbow pipe), on the one hand, it is easy to cause the user to have difficulty in selection or make mistakes when purchasing before the installation of the water heater, and on the other hand, it also increases the production cost of the manufacturer. UTILITY MODEL CONTENTS

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a pressure relief pipe of a safety valve group and a safety valve group, which can be applied in two scenes of horizontal and vertically downward inlets of the water heater.

[0005] The technical scheme for realizing the above object of the utility model is: the pressure relief pipe of the safety valve group, comprising a first pressure relief pipe and a second pressure relief pipe, the end face of the outlet end of the first pressure relief pipe is a bevel and the included angle between the axis of the first pressure relief pipe is 45 degrees, the end face of the inlet end of the second pressure relief pipe is a bevel and the included angle between the axis of the second pressure relief pipe is 45 degrees, the outlet end of the first pressure relief pipe and the inlet end of the second pressure relief pipe are rotationally connected and provided with rotation positioning structure, the pipe wall of the second pressure relief pipe is provided with an opening penetrating in and out, the inlet end of the first pressure relief pipe is provided with a plug-in structure suitable for plugging with the pressure relief port of the safety valve group.

[0006] Preferably, the number of openings is several, and the several openings are uniformly distributed along the circumference of the second pressure relief pipe.

[0007] Further, the number of openings is two, and the two openings are symmetrically arranged along the circumference on the second pressure relief pipe.

[0008] Preferably, the outlet end of the second pressure relief pipe is provided with external threads suitable for connecting with other pipelines or components.

[0009] Preferably, the outlet end of the first pressure relief pipe is provided with a first pressure relief pipe end plate, the included angle between the plate face of the first pressure relief pipe end plate and the axis of the first pressure relief pipe is 45 degrees, the outlet of the first pressure relief pipe is arranged on the first pressure relief pipe end plate, the inlet end of the second pressure relief pipe is provided with a second pressure relief pipe end plate, the included angle between the plate face of the second pressure relief pipe end plate and the axis of the second pressure relief pipe is 45 degrees, and the inlet of the second pressure relief pipe is arranged on the second pressure relief pipe end plate.

[0010] Preferably, the second pressure relief pipe is provided with a flow guide assembly in the axial direction.

[0011] Further, the flow guide assembly comprises a flow guide pipe and a flow guide piece, the flow guide pipe is coaxially arranged in the second pressure relief pipe, the outer diameter of the flow guide pipe is smaller than the inner diameter of the second pressure relief pipe, the length of the flow guide pipe is smaller than the length of the second pressure relief pipe, the inlet end of the flow guide pipe is fixedly connected to the second pressure relief pipe end plate and communicates with the inlet of the second pressure relief pipe, the flow guide piece is conical and coaxially arranged in the flow guide pipe, and the tapered end of the flow guide piece is located outside the outlet end of the flow guide pipe.

[0012] Preferably, the flow guide is composed of a plurality of flow guide plates, each of which is arranged along an axial section of the flow guide pipe, the inner edges of each of the flow guide plates are connected together and located on the axis of the flow guide pipe, the outer edges of each of the flow guide plates are fixedly connected to the inner wall of the flow guide pipe, the plurality of flow guide plates are uniformly distributed along the circumference of the flow guide pipe, the ends of the flow guide plates are located outside the outlet end of the flow guide pipe, the outer edges of the end sides (the parts located outside the outlet end of the flow guide pipe) of the flow guide plates are inclined from outside to inside, the ends of the inclined edges of each of the flow guide plates meet at a point and are located on the axis of the flow guide pipe, forming a tapered end.

[0013] Preferably, the outer edges of the leading end sides of the flow guide plates are connected to the mouth wall of the inlet of the second pressure relief pipe.

[0014] Preferably, an elastic clamping piece adapted to be clamped with the outlet of the first pressure relief pipe is fixedly arranged on the mouth wall of the inlet of the second pressure relief pipe, the elastic clamping piece is annular and extends outward from the mouth wall of the inlet of the second pressure relief pipe, the axis of the elastic clamping piece is perpendicular to the plate surface of the end plate of the second pressure relief pipe, the outer diameter of the elastic clamping piece matches the caliber of the outlet of the first pressure relief pipe, and the elastic clamping piece and the mouth wall of the outlet of the first pressure relief pipe constitute a rotating and fitting connection structure between the outlet end of the first pressure relief pipe and the inlet end of the second pressure relief pipe.

[0015] Further, the elastic clamping piece is composed of a plurality of arc-shaped elastic clamping pieces which are uniformly arranged along the circumference of the inlet of the second pressure relief pipe, there is a spacing between adjacent elastic clamping pieces, the elastic clamping piece includes an elastic plate and a clamping hook arranged at the outer end of the elastic plate, the hook part of the clamping hook extends radially outward, the outer diameter of the elastic plate matches the caliber of the outlet of the first pressure relief pipe, the height of the elastic plate matches the thickness of the end plate of the first pressure relief pipe, and the top end outer wall of the clamping hook is beveled.

[0016] Preferably, the rotating positioning structure includes a positioning protrusion arranged on the side wall of the outlet of the first pressure relief pipe and a positioning groove arranged on the radially outer wall of the elastic clamping piece and matched with the positioning protrusion, the number of the positioning protrusion and the positioning groove is both two, which are symmetrically distributed along the circumference on the respective arrangement wall surfaces.

[0017] Preferably, the two side walls along the circumference of the outlet of the first pressure relief pipe and the side wall facing the outside of the outlet of the first pressure relief pipe of the positioning protrusion are all beveled from outside to inside.

[0018] Further, the two positioning protrusions are arranged at positions corresponding to the top end and the bottom end of the first pressure relief pipe end plate on the side wall of the outlet of the first pressure relief pipe, that is, when the axis of the first pressure relief pipe is horizontal and the plate surface of the first pressure relief pipe end plate forms an angle of 45° with the horizontal plane, the two positioning protrusions are arranged at the top end and the bottom end of the side wall of the outlet of the first pressure relief pipe, respectively. Correspondingly, the two positioning grooves are arranged at positions corresponding to the top end and the bottom end of the second pressure relief pipe end plate on the radial outer wall of the elastic clamping piece, that is, when the axis of the second pressure relief pipe is horizontal and the plate surface of the second pressure relief pipe end plate forms an angle of 45° with the horizontal plane, the two positioning grooves are arranged at the top end and the bottom end of the radial outer wall of the elastic clamping piece, respectively.

[0019] Preferably, a plurality of blocking protrusions are arranged on the side wall of the outlet of the first pressure relief pipe, the height of the blocking protrusions protruding from the side wall of the outlet of the first pressure relief pipe is less than the height of the positioning protrusions protruding from the side wall of the outlet of the first pressure relief pipe, and the plurality of blocking protrusions are uniformly distributed along the circumference of the outlet of the first pressure relief pipe, or the plurality of blocking protrusions and the two positioning protrusions are uniformly distributed along the circumference of the outlet of the first pressure relief pipe.

[0020] Preferably, the two side walls along the circumference of the outlet of the first pressure relief pipe and the side wall facing the outside of the outlet of the first pressure relief pipe of the blocking protrusion are all inclined from the outside to the inside.

[0021] Preferably, a sealing ring is arranged between the first pressure relief pipe and the second pressure relief pipe.

[0022] Further, the outer plate surface of the first pressure relief pipe end plate is provided with a sealing ring mounting groove, the sealing ring mounting groove is coaxial with the outlet of the first pressure relief pipe, the outlet of the first pressure relief pipe is located in the sealing ring mounting groove, and the sealing ring is mounted in the sealing ring mounting groove.

[0023] Preferably, a first stopper is arranged on the outer wall of the first pressure relief pipe, a second stopper is arranged on the outer wall of the second pressure relief pipe, and the arrangement positions of the first stopper and the second stopper are as follows: when the axes of the first pressure relief pipe and the second pressure relief pipe are both horizontal, the two pipes are rotationally connected, and the included angles between the first pressure relief pipe end plate and the second pressure relief pipe end plate and the horizontal plane are both 45°, the first stopper is arranged at the bottom end of the outer wall of the first pressure relief pipe, the second stopper is arranged at the top end of the outer wall of the second pressure relief pipe, the first stopper and the second stopper are located on the same side of the vertical axial section of the pressure relief pipe, and the side walls of the first stopper and the second stopper facing the direction of the vertical axial section of the pressure relief pipe are located on the vertical axial section of the pressure relief pipe.

[0024] Further, the first and second stoppers are rectangular protrusions extending outward from the outer wall of the pressure relief pipe.

[0025] The safety valve group comprises a ball valve, a check valve and a safety valve, the check valve is provided with two medium outlets, the medium outlet of the ball valve is connected to the medium inlet of the check valve, one of the medium outlets of the check valve is connected to the medium inlet of the safety valve, and the pressure relief pipe of the safety valve is connected to the pressure relief pipe of the safety valve group.

[0026] Preferably, the insertion structure of the inlet end of the first pressure relief pipe is an annular outwardly extending elastic insert, and the structure of the elastic insert can be the same as that of the elastic clamping piece, that is, the elastic insert is composed of a plurality of arc-shaped elastic clamping teeth uniformly distributed along the circumference of the inlet of the first pressure relief pipe, and a spacing is left between adjacent elastic clamping teeth, the elastic clamping tooth comprises an elastic plate and a clamping hook arranged at the outer end of the elastic plate, the hook portion of the clamping hook extends radially outward, and the top outer wall of the clamping hook is a bevel.

[0027] The limiting structure suitable for clamping of the elastic insert is arranged in the pressure relief port of the safety valve, the limiting structure is a radially inwardly extending annular boss, the inner diameter of the annular boss matches the outer diameter of the elastic plate, the width of the annular boss matches the length of the elastic plate, and the side of the annular boss facing outward of the pressure relief port is an annular bevel.

[0028] Preferably, the spacing between each adjacent elastic clamping tooth is different in shape, and the annular boss can be provided with a protrusion matched with each different shape of spacing.

[0029] The insertion structure can also adopt any insertion structure suitable for quick insertion between pipelines under the prior art.

[0030] Preferably, the medium inlet of the ball valve is vertically downward, the medium outlet of the ball valve is vertically upward, the medium inlet of the check valve is vertically downward, the two medium outlets of the check valve are both horizontal, the check valve core is arranged in the check valve, the check valve core and the end wall of the medium outlet of the ball valve form a check sealing pair, the medium inlet and the pressure relief port of the safety valve are both horizontal and different in horizontal height, the horizontal safety valve seat is arranged between the medium inlet and the pressure relief port of the safety valve, the vertical safety valve core is arranged in the safety valve, and the safety valve core and the safety valve seat form a safety valve sealing pair.

[0031] Preferably, the valve body of the ball valve, the check valve and the safety valve adopts an integrated structure.

[0032] The beneficial effects of the utility model are:

[0033] (1) Since the first pressure relief pipe and the second pressure relief pipe can relatively rotate and can be positioned after 90° relative rotation, the pressure relief pipe can be converted between a straight pipe and a 90° straight elbow pipe, suitable for installation and use of the safety valve group in two cases of horizontal and vertically downward inlet of the water heater, meeting the installation requirement that the pressure relief pipe outlet of the safety valve group of the water heater must be vertically downward, so that one product can be applied in two working scenes, avoiding selection difficulty or purchase error of the user when purchasing, and reducing production cost of the manufacturer;

[0034] (2) Since the second pressure relief pipe is provided with an opening on the pipe wall, when the pressure relief pipe is applied in the 90° straight elbow pipe form (installed on the pressure relief port of the safety valve group), the opening is communicated with the atmosphere, which can effectively eliminate the back pressure formed at the bending part of the pressure relief pipe during pressure relief, avoid frequent pressure change and flow state disorder of the medium in the front end safety valve due to the back pressure, and cause the safety valve core to frequently oscillate (continuously move up and down) and generate pressure relief noise;

[0035] (3) Since the flow guide assembly in the second pressure relief pipe is provided, the medium entering the second pressure relief pipe can be guided and decompressed during pressure relief (the flow guide plate has a certain decompression effect on the medium), avoiding the medium from being sprayed out of the opening on the pipe wall of the second pressure relief pipe due to excessive pressure;

[0036] (4) Since the matching rotating positioning structures on the side wall of the outlet of the first pressure relief pipe and the radial outer wall of the elastic clamping piece are provided, the first pressure relief pipe and the second pressure relief pipe can be quickly rotated and positioned during relative rotation, forming a straight pipe form or a 90° straight elbow pipe form and always keeping the corresponding form (relative angle fixed), which is convenient for operation of the pressure relief pipe form conversion, and can avoid that the first pressure relief pipe and the second pressure relief pipe form other angles after relative rotation, affecting installation and use of the safety valve group;

[0037] (5) The first pressure relief pipe and the second pressure relief pipe are connected in a plug-in rotating fit mode, which is convenient for disassembly and assembly and convenient for maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a structure schematic view of one embodiment of the pressure relief pipe of the utility model;

[0039] Figure 2 is Figure 1 a sectional view of one use form (in a straight pipe form) of the embodiment;

[0040] Figure 3 is Figure 1Another use form (in the form of a 90° right-angle elbow pipe) of the safety valve group in the embodiment;

[0041] Figure 4 is Figure 1 A sectional view of the first pressure relief pipe in the embodiment;

[0042] Figure 5 is Figure 1 A sectional view of the second pressure relief pipe in the embodiment;

[0043] Figure 6 is a sectional view of one use form (the pressure relief pipe is in the form of a straight pipe) of the safety valve group of the utility model;

[0044] Figure 7 is a sectional view of another use form (the pressure relief pipe is in the form of a 90° right-angle elbow pipe) of the safety valve group of the utility model. DETAILED DESCRIPTION

[0045] All directional indications (for example, up, down, top, bottom, inner, outer, etc.) in the embodiment of the utility model are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and do not constitute a limitation on the actual use direction. If the specific posture changes, the directional indications also change accordingly.

[0046] Referring to Figures 1-5The utility model discloses a pressure relief pipe of safety valve group, including first pressure relief pipe 1 and second pressure relief pipe 2, first pressure relief pipe and second pressure relief pipe are straight pipe, the end face of the export end of first pressure relief pipe is bevel and the included angle between first pressure relief pipe's axis is 45 DEG, the end face of the import end of second pressure relief pipe is bevel and the included angle between second pressure relief pipe's axis is 45 DEG, the export end of first pressure relief pipe and the import end of second pressure relief pipe are connected in rotation and are equipped with rotation positioning structure, the pipe wall of second pressure relief pipe is equipped with the opening 3 of inside and outside through -penetration. Because first pressure relief pipe and second pressure relief pipe can rotate relatively, make the pressure relief pipe can change between straight pipe and 90 DEG right angle elbow pipe two forms, be suitable for the installation use of safety valve group under the two kinds of conditions of water heater's import level and vertical, satisfy the installation requirement that water heater's safety valve group pressure relief pipe export must be vertical, make a product can be adapted to the application under two kinds of working scenes, can avoid the selection difficulty or purchase error of user when purchasing, can also reduce the production cost of manufacturer. The setting of the opening on the pipe wall of second pressure relief pipe, when the pressure relief pipe is 90 DEG right angle elbow pipe form application (when being installed on the pressure relief port of safety valve group), the opening is connected with atmosphere, can effectively eliminate the back pressure formed in the bending of pressure relief pipe during pressure relief, avoid the pressure frequent change and flow state disorder of medium in the safety valve of front end due to back pressure, lead to the frequent oscillation (continuous up and down movement) of safety valve core and the condition of generating pressure relief noise.

[0047] The number of openings is preferably several, and the several openings are evenly distributed along the circumference (the same circumferential direction on the pipe wall) of the second pressure relief pipe. The number of openings is usually two, and the two openings are symmetrically arranged along the circumference on the second pressure relief pipe. The opening can be a rectangular opening.

[0048] The import end of the first pressure relief pipe is preferably provided with a plug-in structure suitable for plugging with the pressure relief port of the safety valve group, facilitating quick connection and disassembly of the pressure relief pipe and the pressure relief port of the safety valve group. The export end of the second pressure relief pipe is preferably provided with an external thread suitable for connecting with other pipelines or components, facilitating quick connection and disassembly with other pipelines or components when needed.

[0049] The outlet end of the first pressure relief pipe is preferably provided with a first pressure relief pipe end plate 4, which is a flat plate with an angle of 45° between its plate surface and the axis of the first pressure relief pipe. The outlet 5 of the first pressure relief pipe is provided on the first pressure relief pipe end plate. The inlet end of the second pressure relief pipe is provided with a second pressure relief pipe end plate 6, which is a flat plate with an angle of 45° between its plate surface and the axis of the second pressure relief pipe. The inlet 7 of the second pressure relief pipe is provided on the second pressure relief pipe end plate. The first pressure relief pipe end plate and the second pressure relief pipe end plate facilitate the connection of the outlet end of the first pressure relief pipe and the inlet end of the second pressure relief pipe. The rotating and mating connection structure of the outlet end of the first pressure relief pipe and the inlet end of the second pressure relief pipe can be provided on the first pressure relief pipe end plate and the second pressure relief pipe end plate.

[0050] A flow guide assembly is preferably provided in the second pressure relief pipe in the axial direction to guide the medium entering the second pressure relief pipe. The flow guide assembly preferably includes a flow guide pipe 8 and a flow guide piece 9. The flow guide pipe is coaxially provided in the second pressure relief pipe, with an outer diameter smaller than the inner diameter of the second pressure relief pipe and a length smaller than the length of the second pressure relief pipe. There is a space between the outer wall of the flow guide pipe and the inner wall of the second pressure relief pipe. The inlet end of the flow guide pipe is fixedly connected to the second pressure relief pipe end plate and communicates with the inlet of the second pressure relief pipe. Reinforcing ribs (or support ribs) can be provided between the outer wall of the flow guide pipe and the inner wall of the second pressure relief pipe. The flow guide piece is preferably conical and coaxially provided in the flow guide pipe, with the tapered end of the flow guide piece located outside the outlet end of the flow guide pipe. The outlet end of the flow guide pipe is preferably located on the side of the opening facing the inlet end of the second pressure relief pipe. The projection of the tapered end of the flow guide piece on the axial section of the second pressure relief pipe is preferably located within the projection of the opening on the axial section of the second pressure relief pipe.

[0051] The flow guide piece is preferably composed of a plurality of flow guide plates, such as three or four. Each flow guide plate is arranged along an axial section of the flow guide pipe. The inner edges of each flow guide plate are connected together and located on the axis of the flow guide pipe. The outer edges of each flow guide plate are fixedly connected to the inner wall of the flow guide pipe. The plurality of flow guide plates are uniformly distributed along the circumference of the flow guide pipe. The ends of the flow guide plates are located outside the outlet end of the flow guide pipe. The outer edges of the end side (the part located outside the outlet end of the flow guide pipe) of the flow guide plates are inclined from outside to inside. The ends of the inclined edges of each flow guide plate meet at a point and are located on the axis of the flow guide pipe, forming a tapered end. The outer edges of the leading end side of the flow guide plates are preferably connected to the mouth wall of the inlet of the second pressure relief pipe.

[0052] The arrangement of the flow guide assembly can guide and reduce the pressure of the medium entering the second pressure relief pipe during the pressure relief process (the flow guide plate can reduce the pressure to a certain extent by blocking the medium), so as to prevent the medium from being sprayed out of the opening on the wall of the second pressure relief pipe due to excessive pressure.

[0053] The elastic clamping piece 10 is preferably fixed on the mouth wall of the inlet of the second pressure relief pipe and is adapted to be clamped with the outlet of the first pressure relief pipe. The elastic clamping piece is annular and extends outward from the mouth wall of the inlet of the second pressure relief pipe. The axis of the elastic clamping piece is perpendicular to the plate surface of the end plate of the second pressure relief pipe. The outer diameter of the elastic clamping piece matches the caliber of the outlet of the first pressure relief pipe, so that the elastic clamping piece can rotate in the outlet of the first pressure relief pipe after being inserted into the outlet. The elastic clamping piece and the mouth wall of the outlet of the first pressure relief pipe form a rotating and matching connection structure between the outlet end of the first pressure relief pipe and the inlet end of the second pressure relief pipe. The plug-in rotating and matching connection between the first pressure relief pipe and the second pressure relief pipe is convenient for disassembly and maintenance.

[0054] The elastic clamping piece is preferably composed of a plurality of arc-shaped elastic clamping teeth uniformly distributed along the circumference of the inlet of the second pressure relief pipe. The elastic clamping teeth are spaced apart from each other to facilitate elastic radial deformation of the elastic clamping teeth when subjected to external force. The elastic clamping teeth include an elastic plate and a clamping hook provided at the outer end of the elastic plate. The hook portion of the clamping hook extends radially outward. The outer diameter of the elastic plate matches the caliber of the outlet of the first pressure relief pipe to enable relative rotation after plugging. The height of the elastic plate matches the thickness of the end plate of the first pressure relief pipe to facilitate axial (axial of the outlet of the first pressure relief pipe) limiting after plugging. The top outer wall of the clamping hook is beveled to facilitate plugging of the elastic clamping teeth into the outlet of the first pressure relief pipe. The bottom surface of the clamping hook is flat to facilitate axial limiting of the elastic clamping piece in the outlet of the first pressure relief pipe by cooperating with the inner wall of the end plate of the first pressure relief pipe after plugging.

[0055] The rotating and positioning structure preferably includes a positioning protrusion 11 provided on the side wall of the outlet of the first pressure relief pipe and a positioning groove (or notch) provided on the radial outer wall of the elastic clamping piece and matched with the positioning protrusion. The number of the positioning protrusions and the positioning grooves is both two, which are symmetrically distributed along the circumference on the respective setting wall surfaces. In the relative rotation process of the first pressure relief pipe and the second pressure relief pipe, each positioning protrusion slides into the corresponding positioning groove, realizing the circumferential limiting and fixing of the elastic clamping piece relative to the outlet of the first pressure relief pipe, and further realizing the rotating and fixing of the second pressure relief pipe relative to the first pressure relief pipe.

[0056] The two side walls of the positioning protrusions along the circumference of the outlet of the first pressure relief pipe and the side wall of the positioning protrusions outward of the outlet of the first pressure relief pipe are preferably inclined from outside to inside, which facilitates the insertion of the elastic clamping member into the outlet of the first pressure relief pipe (the side wall of the positioning protrusions outward of the outlet of the first pressure relief pipe does not significantly block the insertion of the elastic clamping member) and the circumferential sliding of the positioning protrusions in and out of the positioning grooves.

[0057] The two positioning protrusions are preferably arranged at positions on the side wall of the outlet of the first pressure relief pipe corresponding to the topmost end and the bottommost end of the end plate of the first pressure relief pipe, i.e. when the axis of the first pressure relief pipe is horizontal and the plane of the end plate of the first pressure relief pipe forms a 45° angle with the horizontal plane, the two positioning protrusions are arranged at the top end and the bottom end of the side wall of the outlet of the first pressure relief pipe, respectively. Correspondingly, the two positioning grooves are arranged at positions on the radially outer wall of the elastic clamping member corresponding to the topmost end and the bottommost end of the end plate of the second pressure relief pipe, i.e. when the axis of the second pressure relief pipe is horizontal and the plane of the end plate of the second pressure relief pipe forms a 45° angle with the horizontal plane, the two positioning grooves are arranged at the top end and the bottom end of the radially outer wall of the elastic clamping member, respectively. In this way, when the two positioning protrusions are positioned in the two positioning grooves, the axis of the first pressure relief pipe is in line with the axis of the second pressure relief pipe, and the pressure relief pipe is in a straight pipe form. By relatively rotating the first pressure relief pipe and the second pressure relief pipe, the two positioning protrusions are slid out of the two positioning grooves, and then are slid into the two positioning grooves again to be positioned, the axis of the first pressure relief pipe is perpendicular to the axis of the second pressure relief pipe, and the pressure relief pipe is in a 90° right-angle bent pipe form. Moreover, after the two positioning protrusions are positioned in the two positioning grooves, the pressure relief pipe can only be in the straight pipe form or the 90° right-angle bent pipe form, and cannot be in other angle forms to affect the installation and use of the safety valve group.

[0058] A plurality of blocking protrusions 12 can be arranged on the side wall of the outlet of the first pressure relief pipe, the height of the blocking protrusions protruding from the side wall of the outlet of the first pressure relief pipe is less than the height of the positioning protrusions protruding from the side wall of the outlet of the first pressure relief pipe, the plurality of blocking protrusions are uniformly distributed along the circumference of the outlet of the first pressure relief pipe, or the plurality of blocking protrusions and the two positioning protrusions are uniformly distributed along the circumference of the outlet of the first pressure relief pipe. The arrangement of the blocking protrusions can always press the circumferential side wall of the elastic clamping member during the insertion of the elastic clamping member into the outlet of the first pressure relief pipe and the rotation after the insertion of the elastic clamping member into the outlet of the first pressure relief pipe, so that the circumferential side wall of the elastic clamping member always maintains a certain degree of elastic deformation radially inward, facilitating the insertion and rotation of the elastic clamping member relative to the outlet of the first pressure relief pipe.

[0059] The two side walls of the blocking protrusion along the circumference of the outlet of the first pressure relief pipe and the side wall towards the outside of the outlet of the first pressure relief pipe are preferably inclined from the outside to the inside, so that the elastic clamping piece is easily inserted into the outlet of the first pressure relief pipe and rotated after being inserted into the outlet of the first pressure relief pipe.

[0060] A sealing ring 13 is preferably arranged between the first pressure relief pipe and the second pressure relief pipe to prevent leakage of the medium during pressure relief. A sealing ring mounting groove can be arranged on the outer side of the end plate of the first pressure relief pipe, the sealing ring mounting groove is coaxial with the outlet of the first pressure relief pipe, and the outlet of the first pressure relief pipe is located in the sealing ring mounting groove. The sealing ring is mounted in the sealing ring mounting groove.

[0061] A first stop piece 14 is preferably arranged on the outer wall of the first pressure relief pipe, and a second stop piece 15 is preferably arranged on the outer wall of the second pressure relief pipe. The positions of the first stop piece and the second stop piece are preferably as follows: when the axes of the first pressure relief pipe and the second pressure relief pipe are both horizontal, the two pipes are rotationally connected, and the included angles between the first pressure relief pipe end plate, the second pressure relief pipe end plate and the horizontal plane are both 45°, the first stop piece is arranged at the bottom end of the outer wall of the first pressure relief pipe, the second stop piece is arranged at the top end of the outer wall of the second pressure relief pipe, and the first stop piece and the second stop piece are located on the same side of the vertical axial section of the pressure relief pipe. The side walls of the first stop piece and the second stop piece towards the vertical axial section of the pressure relief pipe are located on the vertical axial section of the pressure relief pipe. The length of the first stop piece protruding from the outer wall of the first pressure relief pipe is greater than the distance between the first stop piece and the first pressure relief pipe end plate, the length of the second stop piece protruding from the outer wall of the second pressure relief pipe is greater than the distance between the second stop piece and the second pressure relief pipe end plate, and the distance between the first stop piece and the first pressure relief pipe end plate is the same as the distance between the second stop piece and the second pressure relief pipe end plate. In this way, during the rotation of the first pressure relief pipe and the second pressure relief pipe, when the second pressure relief pipe is rotated to a position where the axis of the second pressure relief pipe is perpendicular to the axis of the first pressure relief pipe (the pressure relief pipe is in the form of a 90° right-angle elbow pipe), in addition to the two positioning protrusions of the rotation positioning structure sliding into the corresponding positioning grooves, the second stop piece abuts against the corresponding side of the first stop piece, thereby assisting the rotation positioning of the first pressure relief pipe and the second pressure relief pipe. The first stop piece and the second stop piece can both be rectangular protrusions protruding outward from the outer wall of the pressure relief pipe.

[0062] Referring to Figure 6 and Figure 7The utility model discloses also disclosed safety valve group, including ball valve, check valve and safety valve, the check valve is equipped with two medium outlets, the medium outlet of ball valve connects the medium import of check valve, the medium outlet of check valve connects the medium import of safety valve, the pressure relief port of safety valve is connected with pressure relief pipe, the pressure relief pipe adopts the pressure relief pipe of any one safety valve group of the utility model discloses.

[0063] The insertion structure of the inlet end of the first pressure relief pipe is preferably an annular outwardly extending elastic insert 16. The structure of the elastic insert can be the same as that of the elastic clamping piece, i.e., the elastic insert is composed of a plurality of arc-shaped elastic clamping pieces that are uniformly distributed along the circumference of the inlet of the first pressure relief pipe. Adjacent elastic clamping pieces are spaced apart. The elastic clamping piece includes an elastic plate and a clamping hook provided at the outer end of the elastic plate. The hook portion of the clamping hook extends radially outward. The top outer wall of the clamping hook is beveled, facilitating insertion into the pressure relief port of the safety valve.

[0064] Correspondingly, a limiting structure adapted for clamping of the elastic insert is provided in the pressure relief port of the safety valve. The limiting structure is preferably a radially inwardly extending annular boss 17. The inner diameter of the annular boss matches the outer diameter of the elastic plate. The width of the annular boss matches the length of the elastic plate. The side of the annular boss facing outward from the pressure relief port is an annular bevel, facilitating insertion of the elastic insert.

[0065] The spacing between adjacent elastic clamping pieces can be different in shape. The annular boss can be provided with protrusions matching the different shapes of the spacing. In this way, after the inlet end of the first pressure relief pipe is inserted into the pressure relief port of the safety valve and rotated relative to it, the protrusions of different shapes are inserted into the conforming spacing between the elastic clamping pieces, achieving positioning of the first pressure relief pipe and the pressure relief port of the safety valve in the circumferential direction. By appropriately setting the positions of the different shapes of the spacing between the elastic clamping pieces and the positions of the different shapes of the protrusions on the annular boss, the angle between the plate surface of the end plate of the first pressure relief pipe and the horizontal plane can be 45° after the first pressure relief pipe is positioned in the circumferential direction with the pressure relief port of the safety valve.

[0066] The insertion structure can also adopt any suitable insertion structure for quick insertion between pipes in the prior art.

[0067] A preferred embodiment of the structure of the ball valve, the check valve and the safety valve is that the valve body 18 of the ball valve is vertically arranged, provided with a ball valve medium inlet and a ball valve medium outlet, the ball valve medium inlet is vertically downward, the ball valve medium outlet is vertically upward, and the axes of the ball valve medium inlet and the ball valve medium outlet are on the same vertical line, a valve ball 19 is arranged in the vertical channel of the ball valve, the ball valve medium outlet is provided with an annular flange extending radially inward, the ball valve medium inlet is threadedly connected with a medium inlet pipe (an inner thread is arranged on the inner wall of the ball valve medium inlet, and an outer thread matched with the inner thread is arranged on the top outer wall of the medium inlet pipe) 20, the top end of the medium inlet pipe is located in the ball valve medium inlet, the valve ball is arranged between the top end of the medium inlet pipe and the annular flange (provided with a suitable sealing element), the top wall of the medium inlet pipe and the bottom wall of the annular flange form a valve seat, and the valve ball is provided with an opening and closing handle outside the valve body of the ball valve; the valve body 21 of the check valve is vertically arranged, provided with a check valve medium inlet and two check valve medium outlets, the check valve medium inlet is vertically downward and coaxially connected with the ball valve medium outlet, the two check valve medium outlets are both horizontal and have the same horizontal axis, one of the two check valve medium outlets is connected with the safety valve, and the other is connected with the inlet of the water heater, the valve body of the check valve is vertically and detachably (for example, threadedly) connected with a check valve cover 22, the check valve cover is in a cylindrical shape, the top end is closed, and the bottom end is open, the bottom end of the check valve cover abuts against the top surface of the annular flange (provided with a suitable sealing element), the inner diameter of the check valve cover is larger than that of the annular flange, the top surface of the annular flange serves as the valve seat of the check valve, the side wall of the check valve cover adopts a frame structure and does not affect the communication between the check valve medium inlet and the two check valve outlets, a check valve core 23 is arranged in the check valve cover, the top end of the check valve core is connected with a vertical check valve rod 24 or is integrated with the check valve rod, a vertically downward guide sleeve 25 is coaxially arranged on the top surface in the check valve cover, the length of the guide sleeve is smaller than the vertical height of the check valve cover, the check valve rod is inserted into the guide sleeve and vertically slides with the guide sleeve, a check valve spring 26 is arranged outside the check valve rod and the guide sleeve, the check valve spring is a cylindrical spring, the top end of the check valve spring abuts against the top surface in the check valve cover, and the bottom end of the check valve spring abuts against the check valve core; the valve body 27 of the safety valve is vertically arranged, provided with a safety valve medium inlet and a pressure relief port, the safety valve medium inlet and the pressure relief port are both horizontally arranged, the upper part of the valve body of the safety valve is detachably (for example, threadedly) connected with a safety valve cover 28, a horizontal safety valve seat is arranged in the safety valve, the safety valve seat divides the valve cavity of the safety valve into an upper cavity and a lower cavity, the safety valve medium inlet communicates with the lower cavity, and the pressure relief port communicates with the upper cavity,The outer end of the safety valve medium inlet is connected with a check valve medium outlet (for connecting the check valve medium outlet of the safety valve), the pressure relief port is connected with the pressure relief pipe, the upper cavity is internally provided with a safety valve core 29, the safety valve core is in a cylindrical shape with an open top end and a closed bottom end, a vertical safety valve rod 30 is coaxially connected with the safety valve core, the outer diameter of the safety valve rod is smaller than the inner diameter of the safety valve core, the safety valve rod extends into the safety valve core from top to bottom, the bottom end of the safety valve rod is fixedly connected with the bottom wall of the safety valve core, or the safety valve rod and the safety valve core are in an integrated structure, a conformable rubber sleeve 31 is sleeved on the safety valve core, the outer edge of the rubber sleeve is provided with an outwardly turned flange, the inner wall of the upper cavity is provided with an annular flange extending inwardly, the bottom end of the safety valve cover abuts against the annular flange, the flange of the rubber sleeve is fixedly clamped between the bottom end of the safety valve cover and the annular flange, the center of the top wall of the safety valve cover is provided with a through hole penetrating in and out, a vertical downward guide sleeve 32 is arranged on the hole wall of the through hole, the safety valve rod is inserted into the guide sleeve and is in sliding fit with the guide sleeve, the top end of the safety valve rod extends out of the safety valve cover, a safety valve spring 33 is sleeved on the safety valve rod, the safety valve spring is a cylindrical spring, the top end of the safety valve spring abuts against the top wall of the safety valve cover, the bottom end of the safety valve spring abuts against the bottom wall of the safety valve core, a rotating handle 34 is coaxially sleeved on the safety valve cover, the rotating handle is in an inverted cup shape, the outer wall of the safety valve cover is provided with an annular boss radially extending outwardly, the rotating handle is in rotational fit with the safety valve cover, a plurality of radially outwardly protrusions are circumferentially arranged on the outer wall of the safety valve cover, the bottom surface of the protrusion is located on the annular boss or is integrated with the annular boss, the inner wall of the rotating handle is provided with a same number of inclined surfaces corresponding to the positions of the protrusions, the inclined surfaces are inclined from bottom to top along the circumference, so that when the rotating handle is rotated, the rotating handle can be axially moved relative to the safety valve cover, the upper part in the rotating handle is provided with an annular flange radially extending inwardly, the inner diameter of the annular flange is the same as the inner diameter of the guide sleeve, the top end of the safety valve rod extends out of the annular flange and is in sliding fit with the inner wall of the annular flange or leaves a sliding gap, the top part of the safety valve rod is provided in a vertical two-lobed structure, a spacing is left between the two lobes, the top end of each lobe is provided with a catch radially extending outwardly, the bottom surface of the catch is clamped on the top surface of the annular flange, the top end of the rotating handle is open, an annular stepped surface or a plurality of radially inwardly protruding protrusions are uniformly distributed in the opening, a cover piece 35 is arranged on the top surface of the annular stepped surface or the plurality of protrusions, the bottom surface of the cover piece is provided with a vertical downward insertion rod, the outer diameter of the insertion rod is greater than the spacing between the two lobes of the top part of the safety valve rod, the insertion rod is inserted between the two lobes of the top part of the safety valve rod.

[0068] The ball valve, the check valve and the safety valve can also adopt any ball valve, check valve and safety valve suitable for pressure system application of water supply or heating in the prior art.

[0069] The valve body of the ball valve, the check valve and the safety valve preferably adopts an integrated structure.

[0070] The safety valve group is applied to the inlet end or the inlet end side of a water heater (the check valve is used for connecting the medium outlet of the water heater to the inlet of the water heater), and a working process is as follows: the valve ball is rotated through the switch handle, the ball valve is opened, water enters the ball valve from the ball valve medium inlet, under the pressure of the water, the check valve core moves vertically upward, the check valve is opened, water enters the valve cavity of the check valve, the safety valve is pre-set with an opening pressure (greater than the pressure of the water entering the ball valve from the ball valve medium inlet), the safety valve remains in a closed state, and water enters the water heater from the check valve medium outlet connected to the water heater. When the pressure in the water heater is increased and greater than the pressure of the water entering the ball valve, the water in the water heater flows reversely into the valve cavity of the check valve, under the pressure of the water flowing reversely into the valve cavity of the check valve, the check valve core moves vertically downward, seals the check valve seat, the check valve is closed, the water flowing reversely into the valve cavity of the check valve flows into the lower cavity of the safety valve, under the pressure of the water, the safety valve core moves vertically upward, the safety valve is opened, the water enters the upper cavity of the safety valve and is discharged through the pressure relief port and the pressure relief pipe, and when the pressure of the water in the water heater is reduced to below the opening pressure pre-set by the safety valve, the safety valve core moves vertically downward under the action of the safety spring, seals the safety valve seat, and the safety valve is closed. When it is necessary to empty the water in the water heater, the ball valve is closed, the safety valve is manually opened through rotation of the rotation handle, and the water in the water heater is discharged through the pressure relief port and the pressure relief pipe.

[0071] The safety valve group has the effects of limiting the pressure in the water heater, preventing the water in the water heater from flowing back to the main circuit (the pipeline at the front end of the ball valve), preventing the discharged water from contacting the water in the water heater and emptying the water in the water heater (convenient for maintenance and service of the water heater), and the like.

[0072] The pressure relief pipe of any one of the safety valve groups can be used in any one of the safety valve groups.

[0073] Any one of the safety valve groups can also adopt the pressure relief pipe of any one of the safety valve groups.

[0074] The utility model discloses each preferred and optional technical means, except special explanation and one preferred or optional technical means is another technical means's further limitation, can arbitrary combination, forms several different technical schemes.

Claims

1. The pressure relief pipe of a safety valve assembly, characterized in that... The device includes a first pressure relief pipe and a second pressure relief pipe. The outlet end of the first pressure relief pipe has an inclined surface with an angle of 45° to its axis. The inlet end of the second pressure relief pipe also has an inclined surface with an angle of 45° to its axis. The outlet end of the first pressure relief pipe and the inlet end of the second pressure relief pipe are rotatably connected and have a rotatable positioning structure. The pipe wall of the second pressure relief pipe has an opening that extends through both the inside and outside. The inlet end of the first pressure relief pipe has a plug-in structure suitable for plugging into the pressure relief port of a safety valve assembly.

2. The pressure relief pipe of the safety valve assembly as described in claim 1, characterized in that... The number of openings is several, and the several openings are evenly distributed along the circumference of the second pressure relief pipe.

3. The pressure relief pipe of the safety valve assembly as described in claim 1, characterized in that... The second pressure relief pipe is provided with a flow guiding component along the axial direction.

4. The pressure relief pipe of the safety valve assembly as described in claim 3, characterized in that... The outlet end of the first pressure relief pipe is provided with a first pressure relief pipe end plate, and the outlet of the first pressure relief pipe is provided on the first pressure relief pipe end plate. The inlet end of the second pressure relief pipe is provided with a second pressure relief pipe end plate, and the inlet of the second pressure relief pipe is provided on the second pressure relief pipe end plate.

5. The pressure relief pipe of the safety valve assembly as described in claim 4, characterized in that... The flow guiding assembly includes a flow guiding tube and a flow guiding component. The flow guiding tube is coaxially disposed inside the second pressure relief tube, and its outer diameter is smaller than the inner diameter of the second pressure relief tube, and its length is smaller than the length of the second pressure relief tube. The inlet end of the flow guiding tube is fixedly connected to the end plate of the second pressure relief tube and communicates with the inlet of the second pressure relief tube. The flow guiding component is conical and coaxially disposed inside the flow guiding tube, and the conical end of the flow guiding component is located outside the outlet end of the flow guiding tube.

6. The pressure relief pipe of the safety valve assembly as described in claim 5, characterized in that... The flow guide is composed of multiple flow guide plates, each of which is arranged along one axial section of the flow guide tube. The inner edges of each flow guide plate are connected together and located on the axis of the flow guide tube. The outer edges of each flow guide plate are fixedly connected to the inner wall of the flow guide tube. The multiple flow guide plates are evenly distributed around the circumference of the flow guide tube. The ends of the flow guide plates are located outside the outlet end of the flow guide tube. The outer edge of the end side of the flow guide plate is an inclined edge that slopes from the outside to the inside.

7. The pressure relief pipe of the safety valve assembly as described in claim 6, characterized in that... An elastic clip suitable for engaging with the outlet of the first pressure relief pipe is fixedly provided on the inlet wall of the second pressure relief pipe. The elastic clip is annular and extends outward from the inlet wall of the second pressure relief pipe. The axis of the elastic clip is perpendicular to the plate surface of the end plate of the second pressure relief pipe. The outer diameter of the elastic clip matches the outlet diameter of the first pressure relief pipe. The elastic clip and the outlet wall of the first pressure relief pipe form a rotating engagement connection structure between the outlet end of the first pressure relief pipe and the inlet end of the second pressure relief pipe.

8. The pressure relief pipe of the safety valve assembly as described in claim 7, characterized in that... The rotation positioning structure includes a positioning protrusion on the side wall of the outlet of the first pressure relief pipe and a positioning groove on the radial outer wall of the elastic clip that cooperates with the positioning protrusion. There are two positioning protrusions and two positioning grooves, which are symmetrically distributed circumferentially on their respective mounting surfaces.

9. A safety valve assembly, characterized in that... The device includes a ball valve, a check valve, and a safety valve. The check valve has two media outlets. The media outlet of the ball valve is connected to the media inlet of the check valve. One media outlet of the check valve is connected to the media inlet of the safety valve. The pressure relief port of the safety valve is connected to a pressure relief pipe. The pressure relief pipe is the pressure relief pipe of the safety valve assembly according to any one of claims 1-8.

10. The safety valve assembly as described in claim 9, characterized in that... The valve bodies of the ball valve, the check valve, and the safety valve are of an integral structure.

Images