CN109442070B - Pressure limiting valve capable of adjusting pressure - Google Patents
Pressure limiting valve capable of adjusting pressure Download PDFInfo
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- CN109442070B CN109442070B CN201811517947.4A CN201811517947A CN109442070B CN 109442070 B CN109442070 B CN 109442070B CN 201811517947 A CN201811517947 A CN 201811517947A CN 109442070 B CN109442070 B CN 109442070B
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- water outlet
- piston
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 249
- 238000007789 sealing Methods 0.000 claims abstract description 212
- 230000000149 penetrating effect Effects 0.000 claims abstract description 26
- 238000003780 insertion Methods 0.000 claims description 20
- 230000037431 insertion Effects 0.000 claims description 20
- 125000003003 spiro group Chemical group 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 10
- 238000007906 compression Methods 0.000 description 10
- 230000007423 decrease Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a pressure limiting valve capable of adjusting pressure, which comprises: a housing having a water inlet end and a water outlet end; a seal member fixed in the housing and provided with a seal hole; the piston comprises a sliding part, a penetrating part and a sealing part which are integrally formed, wherein the penetrating part is penetrated on the sealing hole in a sliding way, and when the sealing part moves to the limit towards the water inlet end, the sealing hole is sealed; the side wall of the piston fixing piece is fixed on the inner side wall of the shell, a water inlet hole is formed in the radial end face of the piston fixing piece, a through piston cavity is formed in the axial direction, a limiting protrusion is arranged in the piston cavity, and the sliding part is connected in the piston cavity in a sealing sliding mode; one end of the adjusting piece is in sealing connection with the piston fixing piece, and the adjusting piece can move back and forth along the direction from the water inlet end to the water outlet end so as to adjust the length of the movable cavity along the direction from the water inlet end to the water outlet end; a spring received within the movable cavity. The invention has the beneficial effect of adjusting the output pressure of the pressure limiting valve.
Description
Technical Field
The invention relates to the field of valve bodies. More particularly, the present invention relates to a pressure limiting valve that regulates pressure.
Background
In boiler system, chemical industry and daily life water supply pipeline, when the water pressure that external water supply system provided is higher, often need first install a pressure limiting valve on the pipeline before inserting user's end or equipment end to reduce the water pressure of user's end, in order to avoid high-pressure water to destroy the pipeline of user's end (for example the pipeline that bearing capacity is not strong such as rubber tube), it can effectively reduce the pressure in the pipe line, reduces because of the pipeline bursts because of the pressure is too high, causes unnecessary loss. The pressure output of the common specification in the domestic and foreign markets is respectively 350kPa, 500kPa and 600 kPa. The pressure output of the existing pressure limiting valves in the market is only single pressure, and the structures of the pressure limiting valves outputting different pressure specifications are different, so that the problems of high production cost and high stock pressure are caused, and the pressure limiting valves with corresponding specifications are required to be preset in advance before the pressure limiting valves are used and installed, so that the trouble of customer selection and the difficulty of market popularization are caused. Aiming at the characteristics, the novel pressure limiting valve with adjustable pressure is designed, so that the pressure limiting valve is worth of thinking of technicians.
Disclosure of Invention
It is an object of the present invention to solve at least the above problems and to provide at least the advantages to be described later.
It is still another object of the present invention to provide a pressure limiting valve with adjustable pressure, which can adjust the output pressure of the pressure limiting valve to adapt to the pressure bearing requirements of different pipelines.
To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided a pressure limiting valve capable of adjusting a pressure, comprising:
a housing having a water inlet end and a water outlet end;
the sealing piece is fixed in the shell and positioned between the water inlet end and the water outlet end, and a sealing hole for communicating the water inlet end and the water outlet end is formed in the sealing piece;
the piston comprises a sliding part, a penetrating part and a sealing part which are integrally formed along the direction from the water inlet end to the water outlet end, wherein the penetrating part is penetrated on the sealing hole in a sliding way, the radial cross-sectional area of the sliding part is smaller than that of the sealing part, the radial cross-sectional area of the sealing part is larger than that of the sealing hole, the radial cross-sectional area of the sealing part is smaller than that of the shell, and when the sealing part moves to the limit towards the water inlet end, the sealing part is abutted against the sealing piece to seal the sealing hole, and when the sealing part is not contacted with the sealing piece, the sealing hole is communicated with the water outlet end;
the piston fixing piece is fixed on the inner side wall of the shell close to the side wall of the water outlet end and is positioned between the water inlet end and the sealing piece, a water inlet hole penetrating through the water inlet end and the sealing hole is formed in the radial end face of the piston fixing piece, a through piston cavity is formed in the piston fixing piece along the axial direction, the sliding part is arranged in the piston cavity in a sealing sliding mode, and a limiting protrusion is arranged in the piston cavity to limit the sliding part to be separated from the piston cavity when sliding towards the water outlet end;
one end of the adjusting piece is in sealing connection with one end of the piston fixing piece, which is positioned between the water inlet end and the sliding part, the adjusting piece, the inner side wall of the piston cavity and the sliding part form a closed movable cavity, and the adjusting piece can move back and forth along the direction from the water inlet end to the water outlet end so as to adjust the length of the movable cavity along the direction from the water inlet end to the water outlet end;
the spring is accommodated in the movable cavity, and two ends of the spring are respectively abutted against the adjusting piece and the sliding part;
when the sliding part moves to the limit towards the water outlet end, the sliding part is abutted against the limiting protrusion, the sealing part is not contacted with the sealing piece, and the spring is in a compressed state;
when the sliding part moves to the limit towards the water inlet end, the sliding part is not contacted with the limiting protrusion and is not contacted with the adjusting piece, the sealing part is abutted on the sealing piece, the spring is in a compressed state, and the elastic force of the spring in the compressed state is smaller than the water pressure of the water inlet end.
Preferably, the adjusting member includes:
the connecting piece is cylindrical, one end of the connecting piece extends into the piston cavity and is in threaded connection with the inner side wall of the piston cavity, a first sealing ring is arranged at the threaded connection part of the connecting piece and the piston cavity, the other end of the connecting piece is positioned outside the piston cavity, a fixing hole is formed in the outer side wall in the radial direction, a positioning column is in threaded connection with the fixing hole, and the insertion end of the positioning column extends into the connecting piece;
the rotary piece is cylindrical, the rotary piece is sleeved in the connecting piece, an annular first groove is formed in the outer side wall of one end, close to the water outlet end, of the rotary piece, an elastic second sealing ring is clamped in the first groove, the outer side wall of the second sealing ring is abutted to the inner side wall of the connecting piece, a spiral groove is formed in the outer side wall of the rotary piece, the groove and the rotary piece are coaxially arranged, the part, extending into the connecting piece, of the positioning column is accommodated in the groove, and the spring is abutted to the rotary piece;
wherein, rotate the rotating member, the reference column is relative to be followed the slot slides, the slot sets up to: when the positioning column is positioned at the end part of the groove close to the water inlet end and the sealing part is abutted on the sealing piece, the elastic force of the spring in the compressed state is smaller than the water pressure of the water inlet end.
Preferably, 3 pairs of positioning grooves are formed in the two side walls of the groove at intervals, the insertion ends are cylindrical, the diameter of each insertion end is slightly smaller than the width of the groove, the length of each positioning groove along the length direction of the groove is smaller than the diameter of each insertion end, and when the insertion ends are respectively located at the positions of the 3 pairs of positioning grooves, and the sealing parts are abutted to the sealing parts, the elastic forces of the springs in the compressed state correspond to the water pressures of the water outlet ends of 350kPa, 500kPa and 600kPa one by one.
Preferably, the distance between the two ends of the groove along the axial direction is smaller than the pitch of the groove;
the end face of the rotating piece, which faces the water inlet end, is sequentially provided with 3 marks, and the 3 marks are positioned on a virtual ring coaxial with the rotating piece;
the water inlet end is arranged on the shell, the water inlet end is provided with a water inlet, the water inlet is connected with the water inlet, and the water inlet is connected with the water outlet;
the positions of the marks are set as follows: when the positioning columns are respectively positioned at the positions of the 3 pairs of positioning grooves, the indication parts are respectively positioned on the 3 marks along the axial projection of the rotating piece.
Preferably, the adjusting member and the sliding portion are provided with a first accommodating groove and a second accommodating groove on opposite end surfaces thereof, the first accommodating groove and the second accommodating groove are cylindrical and coaxially arranged, the diameters of the first accommodating groove and the second accommodating groove are slightly larger than the outer diameter of the spring, and two ends of the spring are respectively abutted to the bottom of the first accommodating groove and the bottom of the second accommodating groove.
Preferably, the end face of the sealing element facing the water outlet end is in a truncated cone shape, the diameter of the sealing element increases from the water inlet end to the water outlet end in sequence, and the sealing hole is in a round shape;
the penetrating part is cylindrical, an annular gap is formed in the circumferential direction of the penetrating part, and the axial section of the gap is hyperbolic;
the sealing part extends outwards towards the end face of the water outlet end to form a cylindrical fixed column with the diameter smaller than that of the end face, a connecting counter bore is formed in the end face of the fixed column, and a third sealing ring is sleeved on the fixed column;
the sealing ring fixing piece is provided with a clamping end with a larger diameter and a fixed end with a smaller diameter, the fixed end is in threaded connection with the connecting counter bore, and the clamping end is abutted to the third sealing ring;
the sealing element faces the end face of the water outlet end, the sealing hole, the penetrating portion, the notch, the sealing portion and the third sealing ring are coaxially arranged, when the third sealing ring moves to the limit of the sealing hole, the sealing portion faces the end face of the sealing element to be completely attached to the end face of the sealing element, and the third sealing ring is abutted to the end face of the sealing element facing the water outlet end.
Preferably, the piston cavity is cylindrical, the limiting protrusion is annular, and the limiting protrusion is arranged at one end of the piston cavity, which is close to the water outlet end;
the sliding part is cylindrical, the diameter of the sliding part is slightly smaller than that of the piston cavity, two annular second grooves are formed in the outer side wall of the sliding part at intervals along the circumferential direction, elastic fourth sealing rings are arranged in the two second grooves in a one-to-one clamping mode, and the fourth sealing rings are abutted to the inner side wall of the piston cavity;
the sliding part and the limiting protrusion are coaxially arranged, and the diameter of the sliding part is larger than the inner diameter of the limiting protrusion.
Preferably, the shell is composed of a water inlet shell and a water outlet shell which are in threaded connection, a fifth sealing ring is sleeved at the threaded connection position of the water inlet shell and the water outlet shell, the water inlet shell is provided with the water inlet end, and the water outlet shell is provided with the water outlet end and the sealing piece;
the piston mounting is cylindrical, the lateral wall of piston mounting with the inside wall of water casing does not contact, have rather than integrated into one piece's annular connecting portion on the piston mounting lateral wall, connecting portion spiro union in the water casing, the interval is equipped with a plurality of on the connecting portion the inlet opening.
Preferably, an inner hexagonal hole coaxially arranged with the rotating member is formed in the end face of the rotating member, which faces the water inlet end, and the projection of the inner hexagonal hole along the axial direction is located in the projection range of the water inlet end along the axial direction.
The invention at least comprises the following beneficial effects:
when a pipeline connected with the water outlet end is closed, the pressure is continuously increased in a water outlet cavity formed by the water outlet end, the sealing part and the shell, the sealing part overcomes the elastic force of the spring and moves towards the sealing part, the sealing hole is closed until the sealing part is completely abutted on the sealing part, balance is achieved, the pressure of the water outlet cavity stops increasing, at the moment, the water pressure in the cavity formed by the water outlet end, the sealing part and the shell is equal to the elastic force of the spring, namely the water pressure required to be born by the pipeline is not equal to the water inlet pressure, but depends on the elastic force of the spring in the compression state, and the limitation of the pressure of the water outlet end is realized;
and when the adjusting piece is adjusted to move towards or away from the sliding part by a certain position, the elastic force of the spring in the compression state can be adjusted, so that the pressure of the water outlet end is adjusted to adapt to the pressure bearing requirements of different water outlet pipelines, for example, the pressure bearing requirements of commonly used 3 pipelines are 350kPa, 500kPa and 600kPa, and the adjusting piece can be adjusted to ensure that the elastic force of the spring in the compression state corresponds to the water pressure of the water outlet end of 350kPa, 500kPa and 600kPa one by one respectively when the adjusting piece is positioned at 3 positions, so as to meet the commonly used 3 pressure output specifications.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic axial cross-section of one embodiment of the present invention;
fig. 2 is a schematic perspective view of the rotating member according to one embodiment of the present invention;
FIG. 3 is a schematic axial cross-section of the rotating member according to one embodiment of the present invention;
fig. 4 is a schematic perspective view of the piston fixing member according to one embodiment of the present invention.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
As shown in fig. 1 to 4, the present invention provides a pressure limiting valve with adjustable pressure, comprising:
a housing 1 having a water inlet end 2 and a water outlet end 3;
a sealing element 4 fixed in the shell 1 and positioned between the water inlet end 2 and the water outlet end 3, wherein a sealing hole for communicating the water inlet end 2 and the water outlet end 3 is arranged on the sealing element 4;
a piston 5 including a sliding portion 50, a penetrating portion 51, and a sealing portion 52 integrally formed in a direction from the water inlet end 2 to the water outlet end 3, wherein the penetrating portion 51 is slidably penetrating through the sealing hole, a radial cross-sectional area of the sliding portion 50 is smaller than a radial cross-sectional area of the sealing portion 52, the radial cross-sectional area of the sealing portion 52 is larger than the radial area of the sealing hole, the radial cross-sectional area of the sealing portion 52 is smaller than the radial cross-sectional area of the housing 1, when the sealing portion 52 moves toward the water inlet end 2 to a limit, the sealing portion 52 abuts against the sealing member 4 to close the sealing hole, and when the sealing portion 52 does not contact with the sealing member 4, the sealing hole is communicated with the water outlet end 3, and water can flow out from the water outlet through a gap between the penetrating portion 51 and the housing 1, a gap between the penetrating portion 51 and the sealing hole, and a gap between the sealing portion 52 and the housing 1;
the piston fixing piece 6 is fixed on the inner side wall of the shell 1 near the side wall of the water outlet end 3 and is positioned between the water inlet end 2 and the sealing piece 4, a water inlet hole 62 penetrating through the water inlet end 2 and the sealing hole is formed in the radial end face of the piston fixing piece 6, water can enter a gap between the penetrating part 51 and the shell 1 from the water inlet hole 62, the piston fixing piece 6 is provided with a penetrating piston cavity 60 along the axial direction, the sliding part 50 is arranged in the piston cavity 60 in a sealing sliding manner, and a limiting protrusion 61 is arranged in the piston cavity 60 to limit the sliding part 50 to be separated from the piston cavity 60 when sliding towards the water outlet end 3;
an adjusting member 7, one end of which is in sealing connection with one end of the piston fixing member 6 located between the water inlet end 2 and the sliding portion 50, wherein the adjusting member 7, the inner side wall of the piston cavity 60 and the sliding portion 50 form a closed movable cavity, and the adjusting member 7 can move back and forth along the direction from the water inlet end 2 to the water outlet end 3 so as to adjust the length of the movable cavity along the direction from the water inlet end 2 to the water outlet end 3;
the adjusting member 7 is in many sealing connection modes, for example, the adjusting member 7 is in sealing threaded connection with the piston fixing member 6, and the adjusting member 7 can move back and forth along the direction from the water inlet end 2 to the water outlet end 3 only by rotating the adjusting member 7; for example, the adjusting piece 7 is connected on the piston fixing piece 6 in a sealing and sliding way, the other end of the adjusting piece 7 is fixedly connected with a pull rod of the waterproof electric cylinder, and the pull rod can drive the adjusting piece 7 to move and stop at the position;
the spring 8 is accommodated in the movable cavity, two ends of the spring 8 are respectively abutted against the adjusting piece 7 and the sliding part 50, and the length of the movable cavity along the direction from the water inlet end 2 to the water outlet end 3 is adjusted, so that the compression degree of the spring 8 can be adjusted, and the elasticity of the spring 8 to the sliding part 50 is changed;
wherein when the sliding part 50 moves to the limit towards the water outlet end 3, the sliding part 50 is abutted against the limit protrusion 61, the sealing part 52 is not contacted with the sealing element 4, and the spring 8 is in a compressed state; when the water outlet end 3 is opened, the sliding part 50 moves to the limit toward the water outlet end 3 under the action of the spring 8 and the water inlet pressure, at this time, the sealing part 52 is not in contact with the sealing member 4, and the water flows out;
when the sliding part 50 moves to the limit toward the water inlet end 2, the sliding part 50 is not contacted with the limit protrusion 61 and is not contacted with the adjusting piece 7, the sealing part 52 is abutted against the sealing piece 4, the spring 8 is in a compressed state, the elastic force of the spring 8 in the compressed state is smaller than the water pressure of the water inlet end 2, when the water outlet end 3 is closed, the pressure continuously increases in the water outlet cavity formed by the water outlet end 3, the sealing part 52 and the shell 1, the sealing part 52 overcomes the elastic force of the spring 8 and moves toward the sealing piece 4 until the sealing part 52 is completely abutted against the sealing piece 4, at the moment, the water pressure in the cavity formed by the water outlet end 3, the sealing part 52 and the shell 1 is equal to the elastic force of the spring 8, namely, the pressure in the water outlet cavity is required to be adjusted, the elastic force of the spring 8 is only required to be adjusted when the sealing part 52 is completely abutted against the sealing piece 4, when the adjusting piece 7 moves a certain distance toward the water outlet end 3 and is fixed at the position, the elastic force of the spring 8 increases, and the pressure in the water outlet cavity is increased; when the adjusting member 7 is moved a certain distance away from the water outlet end 3 and fixed in this position, the elastic force of the spring 8 decreases and the pressure in the water outlet cavity decreases.
In the technical scheme, when the pipeline connected with the water outlet end 3 is closed, the pressure continuously increases in a water outlet cavity formed by the water outlet end 3, the sealing part 52 and the shell 1, the sealing part 52 moves towards the sealing element 4 against the elastic force of the spring 8 until the sealing part 52 is completely abutted against the sealing element 4, the sealing hole is closed to balance, the pressure in the water outlet cavity stops increasing, and at the moment, the water pressure in the cavity formed by the water outlet end 3, the sealing part 52 and the shell 1 is equal to the elastic force of the spring 8, namely the water pressure required to be born by the pipeline is not equal to the water inlet pressure but depends on the elastic force of the spring 8 in the compression state, so that the pressure of the water outlet end 3 is limited;
when the adjusting piece 7 is adjusted to move towards or away from the sliding part 50 by a certain position, the elastic force of the spring 8 in the compression state can be adjusted, so that the pressure of the water outlet end 3 is adjusted to adapt to the pressure bearing requirements of different water outlet pipelines, for example, the pressure bearing requirements of the common 3 pipelines are 350kPa, 500kPa and 600kPa, the adjusting piece 7 can be adjusted, and when the adjusting piece 7 is respectively positioned at 3 positions, the elastic force of the spring 8 in the compression state is respectively in one-to-one correspondence with the water pressure of the water outlet end of 350kPa, 500kPa and 600kPa, so that the common 3 pressure output specifications are met.
In another embodiment, the adjusting member 7 includes:
the connecting piece 70 is in a cylindrical shape, one end of the connecting piece 70 extends into the piston cavity 60 and is in threaded connection with the inner side wall of the piston cavity 60, a first sealing ring is arranged at the threaded connection position of the connecting piece 70 and the piston cavity 60, the other end of the connecting piece 70 is positioned outside the piston cavity 60, a fixing hole is formed in the outer side wall in the radial direction, a positioning column 71 is in threaded connection with the fixing hole, and an insertion end 72 of the positioning column 71 extends into the connecting piece 70; realizing the sealing connection of the connecting piece 70 on the piston cavity 60;
the rotating member 73 is cylindrical, the rotating member 73 is sleeved in the connecting member 70, an annular first groove is formed in the outer side wall of one end, close to the water outlet end 3, of the rotating member 73, an elastic second sealing ring is clamped in the first groove, the outer side wall of the second sealing ring is abutted to the inner side wall of the connecting member 70, the rotating member 73 is in sealing and movable connection with the connecting member 70, a spiral groove 74 is formed in the outer side wall of the rotating member 73, the groove 74 and the rotating member 73 are coaxially arranged, the part, extending into the connecting member 70, of the positioning column 71 is accommodated in the groove 74, the spring 8 is abutted to the rotating member 73, the positioning function of the rotating member 73 is achieved, the rotating member 73 rotates in the spiral direction of the groove 74, and therefore the compression length of the spring 8 is adjusted;
wherein, rotate the rotating member 73, the reference column 71 slides along the groove 74 relatively, the groove 74 is set as follows: when the positioning column 71 is positioned at the end of the groove 74 near the water inlet end 2 and the sealing part 52 is abutted against the sealing member 4, the elastic force of the spring 8 in the compressed state is smaller than the water pressure of the water inlet end 2.
In the above technical solution, an embodiment of the adjusting member 7 for realizing the adjusting function is provided, and the setting of the positioning post 71, the insertion end 72 and the groove 74 can be more stable and convenient for realizing the adjusting function on the compression length of the spring 8.
In another technical solution, 3 pairs of positioning grooves 76 are provided on two side walls of the groove 74 at intervals, the insertion end 72 is cylindrical, the diameter of the insertion end is slightly smaller than the width of the groove 74, and the length of the positioning groove 76 along the length direction of the groove 74 is smaller than the diameter of the insertion end 72, wherein when the insertion ends 72 are respectively located at the positions of 3 pairs of positioning grooves 76, and the sealing part 52 is abutted against the sealing member 4, the elastic forces of the springs 8 in the compressed state are respectively in one-to-one correspondence with the water pressure of the water outlet ends of 350kPa, 500kPa and 600 kPa.
In the above technical solution, since the rotating member 73 is disposed in the housing 1, it is inconvenient to view the position, when the positioning groove 76 is disposed, the side wall of the insertion end 72 will slightly sink into the positioning groove 76 when the rotating member 73 is rotated so that the insertion end 72 is located at the positioning groove 76, and further, when the rotating member 73 is continuously rotated, a larger force must be applied to rotate, thereby playing a role in reminding the user that the user has rotated to one of the 3 pressure positions of the common specification, and according to the order of the magnitude of the elastic force, it is easy to infer which pressure is located at the corresponding position, thereby playing a role in prompting and confirming.
In another embodiment, the distance between the two ends of the groove 74 along the axial direction thereof is smaller than the pitch of the groove 74;
the end face of the rotating member 73, which faces the water inlet end 2, is sequentially provided with 3 marks, and the 3 marks are positioned on a virtual ring coaxial with the rotating member 73; from the water inlet end 2, 3 marks can be seen;
the water inlet end 2 is provided with a water inlet end 2, and the water inlet end 2 is provided with a water inlet end 2 and a water outlet end 2, wherein the water inlet end 2 is provided with a water inlet end 2, and the water inlet end 2 is provided with a water inlet end, and the water inlet end 2 is provided with a water outlet end, and the water inlet end 2 is provided with a water inlet end and a water outlet end 2; the indication part can be seen from the water inlet end 2;
the positions of the marks are set as follows: when the positioning posts 71 are respectively located at the positions of 3 pairs of positioning grooves 76, the projections of the indication parts along the axial direction of the rotating member 73 are respectively located on 3 marks, and when the indication parts point to one of the marks, it is indicated that the water outlet pressure at this time is set to the pressure represented by the corresponding mark.
In the above technical solution, the pressure marks representing 3 specifications can be directly seen from the water inlet end 2, and as long as the indication part points to any one mark, the position of the corresponding positioning groove 76 of the groove 74 at the time of the insertion end 72 can be known, that is, the specific specification of the pressure of the water outlet end 3 of the pressure limiting valve at the time of the insertion end is known, so that a user can know the pressure regulation state of the pressure limiting valve conveniently.
In another technical scheme, the end faces of the adjusting piece 7 opposite to the sliding part 50 are respectively provided with a first accommodating groove and a second accommodating groove, the first accommodating groove and the second accommodating groove are cylindrical and coaxially arranged, the diameters of the first accommodating groove and the second accommodating groove are slightly larger than the outer diameter of the spring 8, and two ends of the spring 8 are respectively abutted to the bottom of the first accommodating groove and the bottom of the second accommodating groove.
In the technical scheme, the diameters of the first accommodating groove and the second accommodating groove are slightly larger than the outer diameter of the spring 8, and the radial limiting force on the spring 8 is provided, so that the spring 8 is more stable in the compression or extension process and is not easy to deviate from the axial direction;
the physical space between the adjusting member 7 and the sliding portion 50 is utilized, and a longer length of the piston cavity 60 is not required, so that the structure is more compact.
In another technical scheme, the end face of the sealing piece 4, which faces the water outlet end 3, is in a truncated cone shape, the diameter of the sealing piece increases in sequence from the water inlet end 2 to the water outlet end 3, and the sealing hole is in a round shape;
the penetrating part 51 is cylindrical, an annular gap is formed in the circumferential direction of the penetrating part 51, the axial cross section of the gap is hyperbolic, and a gap between the penetrating part 51 and the sealing hole forms a streamline shape, so that water flow is convenient to pass;
the end face of the sealing part 52 facing the sealing element 4 is in a truncated cone shape and is matched with the end face of the sealing element 4 facing the water outlet end 3, the end face of the sealing part 52 facing the water outlet end 3 extends outwards to form a cylindrical fixed column with the diameter smaller than that of the end face, a connecting counter bore is formed in the end face of the fixed column, and a third sealing ring is sleeved on the fixed column; the sealing part 52 and the sealing element 4 realize surface sealing, and the sealing effect of the third sealing ring improves the sealing reliability of the sealing part 52;
the sealing ring fixing piece 521 is provided with a clamping end with a larger diameter and a fixing end with a smaller diameter, the fixing end is in threaded connection with the connecting counter bore, and the clamping end is abutted against the third sealing ring; when the third sealing ring is aged and damaged, the replacement is convenient;
the sealing element 4 faces the end face of the water outlet end 3, the sealing hole, the penetrating portion 51, the sealing portion 52, the notch and the third sealing ring are all coaxially arranged, when the third sealing ring faces the sealing hole and moves to the limit, the sealing portion 52 faces the end face of the sealing element 4 and is completely attached to the end face of the sealing element 4, and the third sealing ring is abutted to the end face of the sealing element 4 facing the water outlet end 3.
In another technical scheme, the piston cavity 60 is cylindrical, the limiting protrusion 61 is annular, and the limiting protrusion 61 is arranged at one end of the piston cavity 60 close to the water outlet end 3;
the sliding part 50 is cylindrical, the diameter of the sliding part is slightly smaller than that of the piston cavity 60, two annular second grooves are formed in the outer side wall of the sliding part 50 at intervals along the circumferential direction, elastic fourth sealing rings are clamped in the two second grooves one by one, and the fourth sealing rings are abutted against the inner side wall of the piston cavity 60; the sliding part 50 is in sealing sliding connection with the piston cavity 60, and the two fourth sealing rings further improve the sealing reliability;
the sliding portion 50 and the limiting protrusion 61 are coaxially disposed, and the diameter of the sliding portion 50 is larger than the inner diameter of the limiting protrusion 61.
In another technical scheme, the housing 1 is composed of a water inlet housing 11 and a water outlet housing 12 which are in threaded connection, a fifth sealing ring is sleeved at the threaded connection position of the water inlet housing 11 and the water outlet housing 12, the water inlet housing 11 is provided with the water inlet end 2, and the water outlet housing 12 is provided with the water outlet end 3 and the sealing piece 4; the shell 1 realizes detachable connection and ensures the sealing performance, when different pipelines are connected, the situation that the pipe diameters of the pipelines are inconsistent can exist, and only the connection part of the water outlet end 3 of the water outlet shell 12 can be set to have different specifications, so that the parts of the water inlet shell 11 do not need to be changed, and the pressure limiting valves with various pipe diameter specifications can be obtained as long as the water outlet shell 12 with the required specifications is connected;
the piston mounting 6 is cylindrically, the lateral wall of piston mounting 6 with the inside wall of intake casing 11 does not contact, have rather than integrated into one piece's annular connecting portion on the piston mounting 6 lateral wall, connecting portion spiro union in intake casing 11 is interior, the interval is equipped with a plurality of on the connecting portion inlet opening 62 makes the rivers direction more symmetrical to make each part atress of piston 5 more symmetrical, improve the stability that piston 5 removed, and then make the pressure limiting function of pressure limiting valve be difficult for undulant.
In another technical scheme, the end face of the rotary piece 73, which faces the water inlet end 2, is provided with an inner hexagonal hole 75 coaxially arranged with the rotary piece 73, the projection of the inner hexagonal hole 75 along the axial direction is located in the projection range of the water inlet end 2 along the axial direction, and the rotary piece can extend into a hexagonal wrench from the water inlet end 2, is inserted into the inner hexagonal hole 75, and rotates to rotate the rotary piece 73, so that the rotary piece is convenient and labor-saving.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (7)
1. A pressure limiting valve for regulating pressure, comprising:
a housing having a water inlet end and a water outlet end;
the sealing piece is fixed in the shell and positioned between the water inlet end and the water outlet end, and a sealing hole for communicating the water inlet end and the water outlet end is formed in the sealing piece;
the piston comprises a sliding part, a penetrating part and a sealing part which are integrally formed along the direction from the water inlet end to the water outlet end, wherein the penetrating part is penetrated on the sealing hole in a sliding way, the radial cross-sectional area of the sliding part is smaller than that of the sealing part, the radial cross-sectional area of the sealing part is larger than that of the sealing hole, the radial cross-sectional area of the sealing part is smaller than that of the shell, and when the sealing part moves to the limit towards the water inlet end, the sealing part is abutted against the sealing piece to seal the sealing hole, and when the sealing part is not contacted with the sealing piece, the sealing hole is communicated with the water outlet end;
the piston fixing piece is fixed on the inner side wall of the shell close to the side wall of the water outlet end and is positioned between the water inlet end and the sealing piece, a water inlet hole penetrating through the water inlet end and the sealing hole is formed in the radial end face of the piston fixing piece, a through piston cavity is formed in the piston fixing piece along the axial direction, the sliding part is arranged in the piston cavity in a sealing sliding mode, and a limiting protrusion is arranged in the piston cavity to limit the sliding part to be separated from the piston cavity when sliding towards the water outlet end;
one end of the adjusting piece is in sealing connection with one end of the piston fixing piece, which is positioned between the water inlet end and the sliding part, the adjusting piece, the inner side wall of the piston cavity and the sliding part form a closed movable cavity, and the adjusting piece can move back and forth along the direction from the water inlet end to the water outlet end so as to adjust the length of the movable cavity along the direction from the water inlet end to the water outlet end;
the spring is accommodated in the movable cavity, and two ends of the spring are respectively abutted against the adjusting piece and the sliding part;
when the sliding part moves to the limit towards the water outlet end, the sliding part is abutted against the limiting protrusion, the sealing part is not contacted with the sealing piece, and the spring is in a compressed state;
when the sliding part moves to the limit towards the water inlet end, the sliding part is not contacted with the limiting protrusion and is not contacted with the adjusting piece, the sealing part is abutted on the sealing piece, the spring is in a compressed state, and the elastic force of the spring in the compressed state is smaller than the water pressure of the water inlet end;
the adjusting member includes:
the connecting piece is cylindrical, one end of the connecting piece extends into the piston cavity and is in threaded connection with the inner side wall of the piston cavity, a first sealing ring is arranged at the threaded connection part of the connecting piece and the piston cavity, the other end of the connecting piece is positioned outside the piston cavity, a fixing hole is formed in the outer side wall in the radial direction, a positioning column is in threaded connection with the fixing hole, and the insertion end of the positioning column extends into the connecting piece;
the rotary piece is cylindrical, the rotary piece is sleeved in the connecting piece, an annular first groove is formed in the outer side wall of one end, close to the water outlet end, of the rotary piece, an elastic second sealing ring is clamped in the first groove, the outer side wall of the second sealing ring is abutted to the inner side wall of the connecting piece, a spiral groove is formed in the outer side wall of the rotary piece, the groove and the rotary piece are coaxially arranged, the part, extending into the connecting piece, of the positioning column is accommodated in the groove, and the spring is abutted to the rotary piece;
wherein, rotate the rotating member, the reference column is relative to be followed the slot slides, the slot sets up to: when the positioning column is positioned at the end part of the groove close to the water inlet end and the sealing part is abutted on the sealing piece, the elastic force of the spring in the compressed state is smaller than the water pressure of the water inlet end;
the adjusting piece with first holding tank and second holding tank have been seted up respectively on the terminal surface that sliding part is in opposite directions, first holding tank with the second holding tank is cylindrically to coaxial setting, first holding tank with the diameter of second holding tank slightly is greater than the external diameter of spring, the both ends butt of spring are in respectively the bottom of first holding tank with the bottom of second holding tank.
2. The pressure limiting valve according to claim 1, wherein 3 pairs of positioning grooves are formed in the two side walls of the groove at intervals, the insertion end is cylindrical, the diameter of the insertion end is slightly smaller than the width of the groove, the length of the positioning groove along the length direction of the groove is smaller than the diameter of the insertion end, and when the insertion ends are respectively located at the positions of 3 pairs of positioning grooves and the sealing part is abutted against the sealing part, the elastic force of the spring in the compressed state corresponds to the water pressure of the water outlet ends of 350kPa, 500kPa and 600kPa one by one.
3. The pressure-adjustable pressure limiting valve of claim 2, wherein the distance between the ends of the groove in the axial direction thereof is less than the pitch of the groove;
the end face of the rotating piece, which faces the water inlet end, is sequentially provided with 3 marks, and the 3 marks are positioned on a virtual ring coaxial with the rotating piece;
the water inlet end is arranged on the shell, the water inlet end is provided with a water inlet, the water inlet is connected with the water inlet, and the water inlet is connected with the water outlet;
the positions of the marks are set as follows: when the positioning columns are respectively positioned at the positions of the 3 pairs of positioning grooves, the indication parts are respectively positioned on the 3 marks along the axial projection of the rotating piece.
4. The pressure limiting valve of claim 1, wherein the end surface of the sealing member facing the water outlet end is in a shape of a truncated cone, and the diameter of the sealing member increases in sequence from the water inlet end to the water outlet end, and the sealing hole is in a shape of a circle;
the penetrating part is cylindrical, an annular gap is formed in the circumferential direction of the penetrating part, and the axial section of the gap is hyperbolic;
the sealing part extends outwards towards the end face of the water outlet end to form a cylindrical fixed column with the diameter smaller than that of the end face, a connecting counter bore is formed in the end face of the fixed column, and a third sealing ring is sleeved on the fixed column;
the sealing ring fixing piece is provided with a clamping end with a larger diameter and a fixed end with a smaller diameter, the fixed end is in threaded connection with the connecting counter bore, and the clamping end is abutted to the third sealing ring;
the sealing element faces the end face of the water outlet end, the sealing hole, the penetrating portion, the notch, the sealing portion and the third sealing ring are coaxially arranged, when the third sealing ring moves to the limit of the sealing hole, the sealing portion faces the end face of the sealing element to be completely attached to the end face of the sealing element, and the third sealing ring is abutted to the end face of the sealing element facing the water outlet end.
5. The pressure limiting valve of claim 1, wherein the piston cavity is cylindrical, the limiting protrusion is annular, and the limiting protrusion is arranged at one end of the piston cavity near the water outlet end;
the sliding part is cylindrical, the diameter of the sliding part is slightly smaller than that of the piston cavity, two annular second grooves are formed in the outer side wall of the sliding part at intervals along the circumferential direction, elastic fourth sealing rings are arranged in the two second grooves in a one-to-one clamping mode, and the fourth sealing rings are abutted to the inner side wall of the piston cavity;
the sliding part and the limiting protrusion are coaxially arranged, and the diameter of the sliding part is larger than the inner diameter of the limiting protrusion.
6. The pressure limiting valve with adjustable pressure according to claim 1, wherein the shell consists of a water inlet shell and a water outlet shell which are connected in a screwed mode, a fifth sealing ring is sleeved at the screwed position of the water inlet shell and the water outlet shell, the water inlet shell is provided with the water inlet end, and the water outlet shell is provided with the water outlet end and the sealing piece;
the piston mounting is cylindrical, the lateral wall of piston mounting with the inside wall of water casing does not contact, have rather than integrated into one piece's annular connecting portion on the piston mounting lateral wall, connecting portion spiro union in the water casing, the interval is equipped with a plurality of on the connecting portion the inlet opening.
7. The pressure limiting valve of claim 1, wherein the end face of the rotary member facing the water inlet end is provided with an inner hexagonal hole coaxially arranged with the rotary member, and the projection of the inner hexagonal hole along the axial direction is positioned in the projection range of the water inlet end along the axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811517947.4A CN109442070B (en) | 2018-12-12 | 2018-12-12 | Pressure limiting valve capable of adjusting pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811517947.4A CN109442070B (en) | 2018-12-12 | 2018-12-12 | Pressure limiting valve capable of adjusting pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109442070A CN109442070A (en) | 2019-03-08 |
| CN109442070B true CN109442070B (en) | 2023-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811517947.4A Active CN109442070B (en) | 2018-12-12 | 2018-12-12 | Pressure limiting valve capable of adjusting pressure |
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| CN205000428U (en) * | 2015-08-05 | 2016-01-27 | 南安市沃百伦洁具厂 | Adjustable hydraulic pressure flashing valve |
| CN106015715A (en) * | 2016-07-25 | 2016-10-12 | 金华市宏昌电器有限公司 | Hydraulic control device |
| CN106468367A (en) * | 2015-08-14 | 2017-03-01 | 达纳加拿大公司 | Check valve assembly with integrated form fixing function |
| CN108589832A (en) * | 2018-06-27 | 2018-09-28 | 日丰企业（佛山）有限公司 | Pressure limiting valve applied to water supply pipe |
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2018
- 2018-12-12 CN CN201811517947.4A patent/CN109442070B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1394843A (en) * | 1964-02-21 | 1965-04-09 | Damic Controls Ltd | Improvements to valves actuated by a solenoid |
| CN2514189Y (en) * | 2001-06-02 | 2002-10-02 | 太原丰泉喷灌设备厂 | Pressure relief valve |
| CN204692841U (en) * | 2015-05-18 | 2015-10-07 | 中山市雅西环保科技有限公司 | A kind of flow regulator |
| CN204851611U (en) * | 2015-07-31 | 2015-12-09 | 江苏环力科技发展有限公司 | Adjustable set pressure's water pump pressure controller |
| CN205000428U (en) * | 2015-08-05 | 2016-01-27 | 南安市沃百伦洁具厂 | Adjustable hydraulic pressure flashing valve |
| CN106468367A (en) * | 2015-08-14 | 2017-03-01 | 达纳加拿大公司 | Check valve assembly with integrated form fixing function |
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| CN108589832A (en) * | 2018-06-27 | 2018-09-28 | 日丰企业（佛山）有限公司 | Pressure limiting valve applied to water supply pipe |
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|---|---|
| CN109442070A (en) | 2019-03-08 |
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