CN216200901U

CN216200901U - Overflow valve with groove-shaped pressure relief structure

Info

Publication number: CN216200901U
Application number: CN202122301068.1U
Authority: CN
Inventors: 罗昌国; 陈宇波; 许乐
Original assignee: China Lutian Machinery Co ltd
Current assignee: China Lutian Machinery Co ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2022-04-05
Anticipated expiration: 2031-09-22

Abstract

The utility model provides an overflow valve with a groove-shaped pressure relief structure, and belongs to the technical field of overflow valves. The overflow valve core solves the problem that the existing overflow valve core has larger noise in the resetting process. The overflow valve with the groove-shaped pressure relief structure comprises an overflow valve body with a high-pressure area and a pressure relief hole, an overflow valve core arranged in the overflow valve body, a spring arranged in the overflow valve body and used for resetting the overflow valve core, and a sealing ring arranged in the overflow valve body and located between the high-pressure area and the pressure relief hole, wherein a blocking head is arranged at one end, facing the high-pressure area, of the overflow valve core, the blocking head is provided with a first cylindrical surface capable of being attached to the sealing ring, the blocking head is provided with a second cylindrical surface, the second cylindrical surface is close to the side of the high-pressure area relative to the first cylindrical surface, the outer diameter of the second cylindrical surface is smaller than that of the first cylindrical surface, and at least two discharge grooves are formed in the second cylindrical surface in the circumferential direction. The structure reduces the noise of the overflow valve core in the resetting process.

Description

Overflow valve with groove-shaped pressure relief structure

Technical Field

The utility model belongs to the technical field of overflow valves, and particularly relates to an overflow valve with a groove-shaped pressure relief structure.

Background

The existing overflow valve used in the high-pressure cleaning machine pump mainly comprises a screw plug, a sealing ring, a gasket, a spring, a valve core, a supporting ring, a valve sleeve and a retaining ring, wherein the sealing ring separates a high-pressure area from a low-pressure area during working, when the high-pressure cleaning machine is shut down, the pressure of a system rises, the valve core is pushed to move leftwards, when the pressure reaches a set value, an overflow hole in the valve core moves to the left side of the sealing ring, so that the high-pressure area is communicated with the low-pressure area, the system starts to overflow, meanwhile, the valve core moves to drive a micro switch to act, a system power supply is cut off, the system stops working, the pressure drops, the valve core moves rightwards under the action of the spring so that the overflow hole is covered by the sealing ring, and the system enters a pressure maintaining state.

At present, the chinese patent network discloses a gun closing shutdown type overflow valve (grant No.: CN2694014Y, it includes case, plug screw, big sealing washer, left gasket, spring, right gasket, right sealing washer, valve barrel, little sealing washer is constituteed, and big sealing washer is arranged in the outer lane of plug screw, and left sealing washer is arranged in the inner circle of plug screw, and the case is arranged in plug screw and valve barrel, and the case is external to have the spring, and left gasket and right gasket are put to the both ends of spring, and right sealing washer is arranged in the inner circle of valve barrel, and the valve barrel is external to have little sealing washer, and the top is the case seat seal at the hole left end of valve barrel of cylinder area two-stage cone. The right end of the overflow valve is communicated with the high pressure of the cleaning machine, when the cleaning machine works, the valve core head seat covers and props against the inner hole end of the valve sleeve, the high pressure and the low pressure are separated, when the cleaning machine closes the spray gun, the pressure of the cleaning machine is higher than the set pressure, the hydraulic pressure pushes the valve core to move leftwards, when the outer cylindrical surface at the top end of the valve core moves to the left position of the right sealing ring, the high pressure area is communicated with the low pressure area, the system overflows, and the power part of the system stops working; when the pressure of the system is reduced, the valve core moves rightwards under the action of the spring, when the right sealing ring seals the outer cylindrical surface at the top end of the valve core, the system stops releasing pressure and is in a pressure maintaining state, and the valve core and the valve sleeve are sealed through the sealing ring during pressure maintaining.

In the pressure relief process, the valve core moves to the extreme position leftwards, the large conical surface of the valve core seat seal is arranged opposite to the right sealing ring, a conical overflow area is formed between the large conical surface and the right sealing ring, when a large amount of high-pressure water flows through the overflow area, the pressure during pressure relief is very high, the right sealing ring is extruded by high-pressure water to enable the right sealing ring to face leftwards and deform along the radial direction, then when the system pressure is reduced and the valve core moves rightwards, the distance between the large conical surface and the right sealing ring is narrowed, so that an overflow channel is very narrow, the pressure relief area is narrowed, when the high-pressure water flows through the gap, the water flow speed is very high, the right sealing ring and the water flow generate friction vibration, and squeaking noise is generated; in addition, air is mixed in the high-pressure water, the pressure of the high-pressure water flow is changed when the pressure is relieved, and the air in the high-pressure water flow can generate friction vibration with the sealing ring to generate noise.

Disclosure of Invention

The utility model aims to solve the problems in the prior art, and provides an overflow valve with a groove-shaped pressure relief structure, which aims to solve the technical problems that: how to reduce the noise of the overflow valve core in the resetting process.

The purpose of the utility model can be realized by the following technical scheme:

an overflow valve with a groove-shaped pressure relief structure comprises an overflow valve body with a high-pressure area and a pressure relief hole, an overflow valve core arranged in the overflow valve body, a spring arranged in the overflow valve body and used for resetting the overflow valve core, and a sealing ring arranged in the overflow valve body and positioned between the high-pressure area and the pressure relief hole, wherein one end, facing the high-pressure area, of the overflow valve core is provided with a sealing head, the sealing head is provided with a first cylindrical surface which can be attached to the sealing ring, the overflow valve is characterized in that the sealing head is provided with a second cylindrical surface, the second cylindrical surface is close to the high-pressure area side relative to the first cylindrical surface, the outer diameter of the second cylindrical surface is smaller than that of the first cylindrical surface, and a flow relief groove is formed in the second cylindrical surface in the circumferential direction.

The working principle is as follows: the high-pressure area of the overflow valve is communicated with the high pressure of the cleaning machine, when the cleaning machine works, the sealing head seals the high-pressure area, the first cylindrical surface is attached to the sealing ring, and at the moment, high-pressure water cannot enter the overflow valve; when the cleaning machine closes the spray gun, the pressure of the cleaning machine is higher than the set pressure, the overflow valve core is pushed by high-pressure water to move towards the direction far away from the high-pressure area, when the overflow valve core moves towards the limit position, the cylindrical surface I is separated from the sealing ring, at the moment, the high-pressure water flows towards the pressure relief hole through the gap between the overflow groove, the overflow valve core and the inner wall of the overflow valve body, at the moment, the sealing ring deforms under the impact extrusion of the high-pressure water, the sealing ring deforms towards the direction far away from the high-pressure area and the sealing ring deforms along the radial direction, so that the inner diameter of the sealing ring is reduced, when the overflow valve core moves towards the high-pressure area under the action of the spring to reset, the cylindrical surface II is attached to the sealing ring, at the moment, the high-pressure water still can flow towards the pressure relief hole through the gap between the overflow groove, the overflow valve core and the inner wall of the overflow valve body, compared with the prior art, the structure has the advantages that in the process of resetting of the overflow valve core, the flow discharging area of the high-pressure water is far larger than that of the high-pressure water in the prior art, the flow discharging speed of the high-pressure water is obviously reduced, and the flow discharging squeaking sound is greatly reduced; and secondly, the second cylindrical surface is attached to the sealing rings, and the two pairs of sealing rings on the second cylindrical surface play a role in supporting and positioning, so that the deformation degree of the sealing rings extruded by high-pressure water is reduced, and meanwhile, the friction vibration generated by the sealing rings through high-pressure water impact is also reduced, and the squeaking sound of the drainage is further reduced.

In the overflow valve with the groove-shaped pressure relief structure, a step surface is arranged between the first cylindrical surface and the second cylindrical surface, and the step surface is arranged in an inclined manner. Through the setting of this structure, at the in-process that the overflow valve core resets, the inner wall of sealing washer earlier with face of cylinder two-phase contact, along with the propulsion that the overflow valve core resets, the step face is close to the sealing washer gradually, because the step is personally submitted the slope and is set up, and then make the sealing washer along the step face upward movement to face of cylinder one of slope, the step is personally submitted the slope and is set up the effect that plays the direction to the overflow valve core resets, avoids the overflow valve core to reset and appears blocking or scrape the problem of damaging the sealing washer.

In the overflow valve with the groove-shaped pressure relief structure, the flow relief groove is a rectangular groove, and one end of the flow relief groove extends to the step surface. Through the arrangement of the structure, the length and the depth of the drainage groove of the structure are long, so that a larger drainage area is ensured when high-pressure water is drained; one end of the drainage groove extends to the step surface, so that high-pressure water directly flows to the step surface, and the high-pressure water flows to a position between the first cylindrical surface and the inner wall of the overflow valve body under the guidance of the step surface, and the drainage of the high-pressure water is facilitated.

In the overflow valve with the groove-shaped pressure relief structure, the outer edge of the second cylindrical surface facing one end of the high pressure area is provided with a chamfer. Through the setting of this structure, at the in-process that the overflow valve core resets, the second in face of cylinder contacts with the inner wall of sealing washer earlier, because the sealing washer has radially taken place to warp and makes the internal diameter of sealing washer diminish, the setting up of chamfer guarantees that the sealing washer can follow the chamfer smoothly with the second in face of cylinder contact, avoids the dead problem of card that resets to appear in the overflow valve core.

In the overflow valve with the groove-shaped pressure relief structure, the number of the discharge grooves is at least two, and all the discharge grooves are arranged at intervals along the circumferential direction of the second cylindrical surface. Through the setting of this structure, every earial drainage groove is a pressure release tributary, the high pressure water carries out the earial drainage through a plurality of pressure release tributaries, carry out the earial drainage through ring toper overflow area with prior art and compare, under the prerequisite of guaranteeing big earial drainage area, the area of contact of high pressure water with the sealing washer has been showing again and has been reduced for the atress of sealing washer is less, the energy of high pressure water effect on the sealing washer has been weakened greatly, thereby the friction vibrations of sealing washer have been reduced, the sound of whistling of earring of further reduction earial drainage.

In the overflow valve with the groove-shaped pressure relief structure, the overflow valve body comprises an overflow valve seat and an overflow valve nut connected with the overflow valve seat, a sealing groove is formed at the joint of the overflow valve seat and the overflow valve nut, and the sealing ring is arranged in the sealing groove.

Compared with the prior art, the overflow valve with the groove-shaped pressure relief structure has the following advantages: in the process of resetting the overflow valve core, the drainage area of high-pressure water is far larger than that of high-pressure water in the prior art, the drainage speed of the high-pressure water is obviously reduced, and the squealing noise of the drainage is further greatly reduced; secondly, the second cylindrical surface is attached to the sealing rings, and the two pairs of sealing rings on the second cylindrical surface play a role in supporting and positioning, so that the deformation degree of the sealing rings extruded by high-pressure water is reduced, and meanwhile, the friction vibration generated by the sealing rings through high-pressure water impact is also reduced, and the squeaking sound of the drainage is further reduced; in addition, each drainage groove is a pressure relief branch, and high-pressure water carries out the earial drainage through a plurality of pressure relief branches, compares with prior art through carrying out the earial drainage in the annular cone overflow region, under the prerequisite of guaranteeing big earial drainage area, is showing again and has reduced the area of contact of high-pressure water with the sealing washer for the atress of sealing washer is less, has weakened the energy of high-pressure water effect on the sealing washer greatly, thereby has reduced the friction vibrations of sealing washer, further reduces the sound of whistling of earring of earial drainage.

Drawings

Fig. 1 is one of the schematic cross-sectional structures of the present invention.

Fig. 2 is one of schematic cross-sectional views of the seal ring of the present invention after being deformed by compression.

FIG. 3 is a second schematic cross-sectional view of the present invention.

Fig. 4 is a perspective view of the relief valve cartridge of the present invention.

In the figure, 1, an overflow valve body; 1a, an overflow valve seat; 1b, an overflow valve nut; 100. a high pressure region; 101. a pressure relief vent; 102. a drainage lumen; 103. a spring cavity; 2. an overflow valve core; 20. a sealing head; 20a, a first cylindrical surface; 20b, a cylindrical surface two; 20c, a drainage groove; 20d, step surfaces; 20e, chamfering; 20f, a tapered portion; 3. a spring; 4. and (5) sealing rings.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

Example 1

As shown in fig. 1 to 4, the relief valve with the groove-shaped relief structure includes an overflow valve body 1 having a high pressure region 100 and a relief hole 101, an overflow valve core 2 disposed in the overflow valve body 1, a spring 3 disposed in the overflow valve body 1 for resetting the overflow valve core 2, and a seal ring 4 disposed in the overflow valve body 1 and located between the high pressure region 100 and the relief hole 101, wherein the overflow valve body 1 has a relief cavity 102 and a spring cavity 103, the high pressure region 100 is opened on one end surface of the overflow valve body 1 and the high pressure region 100 is communicated with the relief cavity 102, the relief hole 101 is opened on the outer circumferential surface of the overflow valve body 1 and opened in the radial direction, the relief hole 101 has two pressure holes, one of the relief hole 101 is communicated with the relief cavity 102, the other of the relief hole 101 is communicated with the spring cavity 103, the spring 3 is disposed in the spring cavity 103, and one end of the spring 3 abuts against the overflow valve core 2, The other end is abutted against the overflow valve body 1, and the spring 3 makes the overflow valve core 2 always have the tendency of moving towards the high pressure area 100.

As shown in fig. 1 to 4, one end of the overflow valve core 2 facing the high pressure region 100 is provided with a sealing head 20, an end face of the sealing head 20 is provided with a tapered portion 20f capable of blocking the high pressure region 100, the sealing head 20 is provided with a first cylindrical surface 20a capable of being attached to the seal ring 4, the sealing head 20 is provided with a second cylindrical surface 20b, the second cylindrical surface 20b is close to the high pressure region 100 side relative to the first cylindrical surface 20a, the second cylindrical surface 20b is located between the tapered portion 20f and the first cylindrical surface 20a, the outer diameter of the second cylindrical surface 20b is smaller than that of the first cylindrical surface 20a, a step surface 20d is provided between the first cylindrical surface 20a and the second cylindrical surface 20b, and the second cylindrical surface 20b is provided with at least two drainage grooves 20c along the circumferential direction; in this embodiment, the drainage grooves 20c are rectangular grooves, one end of each drainage groove 20c extends to the step surface 20d, the number of the drainage grooves 20c is three, and the three drainage grooves 20c are uniformly distributed along the circumferential direction of the second cylindrical surface 20 b.

As shown in fig. 1 and 2, the straight line arrow indicates the flow direction of the high-pressure water flow, the high-pressure area 100 of the overflow valve is communicated with the high pressure of the cleaning machine, when the cleaning machine works, the conical part 20f of the sealing head 20 is sealed against the high-pressure area 100, and the first cylindrical surface 20a is attached to the sealing ring 4, so that the high-pressure water cannot enter the overflow valve; when the cleaning machine closes the spray gun, the pressure of the cleaning machine is higher than the set pressure, the high-pressure water pushes the overflow valve core 2 to move towards the direction far away from the high-pressure area 100, when the overflow valve core 2 moves towards the limit position, the first cylindrical surface 20a is separated from the sealing ring 4, at the moment, the high-pressure water flows to the pressure relief hole 101 through the gap between the discharge groove 20c and the inner wall of the overflow valve body 1, at the moment, the sealing ring 4 deforms under the impact and extrusion of the high-pressure water, the sealing ring 4 deforms towards the direction far away from the high-pressure area 100 and the sealing ring 4 deforms along the radial direction, so that the inner diameter of the sealing ring 4 is reduced, when the overflow valve core 2 moves towards the high-pressure area 100 under the action of the spring 3 to reset, the second cylindrical surfaces 20b are attached to the sealing ring 4, at the moment, the high-pressure water can still flow to the pressure relief hole 101 through the gap between the discharge groove 20c and the inner wall of the overflow valve core 2 and the overflow valve body 1, compared with the prior art, in the resetting process of the overflow valve core 2, the high-pressure water leakage area is far larger than that in the prior art, the high-pressure water leakage speed is obviously reduced, and the leakage squeaking sound is greatly reduced; secondly, the second cylindrical surface 20b is attached to the sealing ring 4, and the second cylindrical surface 20b plays a role in supporting and positioning the sealing ring 4, so that the deformation degree of the sealing ring 4 extruded by high-pressure water is reduced, and meanwhile, the friction vibration generated by the sealing ring 4 through high-pressure water impact is also reduced, and the squeaking sound of the drainage is further reduced; in addition, each drainage groove 20c is a pressure relief branch, and high-pressure water is drained through a plurality of pressure relief branches, compared with the prior art that the high-pressure water is drained through a ring-cone-shaped overflow area, on the premise that a large drainage area is ensured, the contact area between the high-pressure water and the sealing ring 4 is remarkably reduced, so that the stress of the sealing ring 4 is small, the energy of the high-pressure water acting on the sealing ring 4 is greatly weakened, the friction vibration of the sealing ring 4 is reduced, and the squeaking sound of the drainage is further reduced.

Further, the step surface 20d in this embodiment is provided obliquely. In the process that overflow valve element 2 resets, the inner wall of sealing washer 4 contacts with face two 20b earlier, along with the propulsion that overflow valve element 2 resets, step face 20d is close to sealing washer 4 gradually, perpendicular step face 20d causes overflow valve element 2 to reset easily and appears the card and die or scrape the problem that damages sealing washer 4, step face 20d in this embodiment is the slope setting, and then make sealing washer 4 move to face one 20a along the slope step face 20d slant, step face 20d is the slope and sets up the effect of playing the direction to overflow valve element 2 resets, avoid overflow valve element 2 to reset and appear the card and die or scrape the problem that damages sealing washer 4.

As shown in fig. 1, the outer edge of the second cylindrical surface 20b toward the end of the high pressure region 100 has a chamfer 20 e. In the resetting process of the overflow valve core 2, the second cylindrical surface 20b is firstly contacted with the inner wall of the sealing ring 4, the sealing ring 4 is deformed along the radial direction to reduce the inner diameter of the sealing ring 4, the inner diameter of the sealing ring 4 is smaller than the outer diameter of the second cylindrical surface 20b at the moment, and the chamfer 20e is arranged to ensure that the sealing ring 4 can be smoothly contacted with the second cylindrical surface 20b along the chamfer 20e, so that the problem of resetting and clamping of the overflow valve core 2 is avoided.

As shown in fig. 1, the relief valve body 1 includes a relief valve seat 1a and a relief valve nut 1b connected to the relief valve seat 1a, a sealing groove is formed at a joint of the relief valve seat 1a and the relief valve nut 1b, and a sealing ring 4 is disposed in the sealing groove.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. An overflow valve with a groove-shaped pressure relief structure comprises an overflow valve body (1) with a high-pressure area (100) and a pressure relief hole (101), an overflow valve core (2) arranged in the overflow valve body (1), a spring (3) arranged in the overflow valve body (1) and used for resetting the overflow valve core (2), and a sealing ring (4) arranged in the overflow valve body (1) and positioned between the high-pressure area (100) and the pressure relief hole (101), wherein one end, facing the high-pressure area (100), of the overflow valve core (2) is provided with a sealing head (20), the sealing head (20) is provided with a first cylindrical surface (20a) which can be attached to the sealing ring (4), the overflow valve is characterized in that the sealing head (20) is provided with a second cylindrical surface (20b), the second cylindrical surface (20b) is close to the side of the high-pressure area (100) relative to the first cylindrical surface (20a), and the outer diameter of the second cylindrical surface (20b) is smaller than the outer diameter of the first cylindrical surface (20a), and a drainage groove (20c) is formed in the second cylindrical surface (20b) along the circumferential direction.

2. The overflow valve with the groove-shaped pressure relief structure according to claim 1, wherein a step surface (20d) is arranged between the first cylindrical surface (20a) and the second cylindrical surface (20b), and the step surface (20d) is arranged in an inclined manner.

3. The relief valve with groove-shaped relief structure according to claim 2, wherein one end of the relief groove (20c) extends to the step surface (20 d).

4. The relief valve with groove-shaped relief structure according to claim 1, wherein the outer edge of the second cylindrical surface (20b) facing the high pressure region (100) has a chamfer (20 e).

5. The overflow valve with the groove-shaped pressure relief structure according to claim 1 or 3, wherein the number of the drainage grooves (20c) is at least two, and all the drainage grooves (20c) are arranged at intervals along the circumference of the cylindrical surface II (20 b).

6. The overflow valve with the groove-shaped pressure relief structure according to claim 1, wherein the overflow valve body (1) comprises an overflow valve seat (1a) and an overflow valve nut (1b) connected with the overflow valve seat (1a), a sealing groove is formed at the joint of the overflow valve seat (1a) and the overflow valve nut (1b), and the sealing ring (4) is arranged in the sealing groove.