Mounting structure of pressure release valve

Abstract

The utility model discloses a mounting structure of a pressure release valve, which comprises a pump cavity upper cover and a pressure release valve, and the pressure release valve comprises a valve body, a valve bonnet and an elastic part arranged between the valve body and the valve bonnet; the pump cavity upper cover is provided with a first cavity providing a valve bonnet moving space, the first cavity is provided with an abutting table abutting against the valve bonnet, a first communicating opening communicating with the drainage cavity and a second communicating opening communicating with the water suction cavity, and the second communicating opening is formed in the middle of the abutting table. The abutting platform is arranged, so that fluid entering from the first communication port can be distributed around the abutting platform, the pressure received by the bottom of the valve bonnet is more uniform when the fluid below the valve bonnet is in contact with the valve bonnet, and the problem that the valve bonnet jumps due to uneven stress is avoided; unstable operation of the pressure release valve caused by non-uniform pressure application of the contacted fluid is avoided, the section of the first communication port is oval, and the oval first communication port is beneficial to circulation of the fluid with large flow; the second communication port has a circular cross-sectional shape.

Description

Technical Field

[0001] The utility model belongs to the technical field of diaphragm booster pumps, and in particular relates to an installation structure of a pressure relief valve. Background Art

[0002] The diaphragm booster pump is a device that pressurizes and outputs fluid. In order to protect the internal components of the diaphragm booster pump or avoid the problem of fluid overflow or fluid spraying to the outside due to excessive pressure in the diaphragm booster pump, a pressure relief valve is set in the prior art to avoid this problem. The pressure relief valve sets a certain working pressure. When the fluid pressure is greater than or equal to the working pressure, the pressure relief valve completes the pressure relief operation and returns the fluid to the working pressure set by the pressure relief valve.

[0003] However, in the pressure relief valve of the prior art, since the valve bonnet of the pressure relief valve only fits above the pressure relief channel and the channel for fluid to enter is usually arranged at one end of the side or bottom of the valve bonnet, this arrangement is prone to problems such as valve bonnet jumping and unstable operation of the pressure relief valve due to uneven force on the valve bonnet. Utility Model Content

[0004] The utility model aims to provide an installation structure of a pressure relief valve to solve the above-mentioned technical problems. A resistance platform is provided so that the fluid entering from the first connecting port can be distributed around the resistance platform, thereby improving the pressure received by the bottom of the valve bonnet when the fluid under the valve bonnet contacts the valve bonnet, thereby avoiding the problem of the valve bonnet jumping due to uneven force, and avoiding the unstable operation of the pressure relief valve due to uneven pressure of the contacting fluid.

[0005] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:

[0006] A pressure relief valve installation structure includes a pump chamber upper cover and a pressure relief valve arranged on the pump chamber upper cover, wherein the pressure relief valve includes a valve body connected to the pump chamber upper cover, a valve cap, and an elastic part arranged between the valve body and the valve cap;

[0007] The pump chamber upper cover is provided with a first cavity that provides a space for the valve cap to move. The first cavity is provided with a resistance platform that resists the valve cap, a first connecting port connected to the drainage chamber, and a second connecting port connected to the water absorption chamber. The second connecting port is arranged in the middle of the resistance platform. By setting the elastic part, the valve cap and the abutment platform are continuously abutted against each other, so as to avoid the first connecting port and the second connecting port within the working range of pressure being connected. When the fluid pressure in the drainage chamber is relatively large, the valve cap is moved to release the contact between the valve cap and the abutment platform. The first connecting port is connected with the second connecting port, so that the fluid in the drainage chamber higher than the design pressure can flow back to the water suction chamber from the second connecting port, thereby completing the pressure relief and protecting the internal components of the diaphragm booster pump. The abutment platform is set so that the fluid entering from the first connecting port can be distributed around the abutment platform, so as to improve the pressure uniformity received by the bottom of the valve cap when the fluid under the valve cap contacts the valve cap, so as to avoid the problem of the valve cap jumping due to uneven force, and avoid the unstable operation of the pressure relief valve due to uneven pressure of the contacted fluid. The cross-sectional shape of the first connecting port is elliptical, and the elliptical first connecting port is conducive to the circulation of fluid with a larger flow rate; the cross-sectional shape of the second connecting port is circular.

[0008] Preferably, a resistance ring is arranged above the first cavity, and a fitting portion is arranged on the outer edge above the valve cap to resist the upper end of the resistance ring. The resistance ring and the fitting portion are arranged at the same time, so that the movement process of the valve cap is relatively stable, and the process in which the fluid below continuously applies pressure to the valve cap can also maintain stability, thereby avoiding the problem of frequent jumping of the pressure relief valve.

[0009] Preferably, the valve bonnet ring is sleeved on the valve body, so that the valve bonnet is guided by the side wall of the valve body during movement, so that the valve bonnet moves more smoothly, avoiding the problem of the valve bonnet shaking during pressure relief and the problem of the valve bonnet shaking due to the action of fluid that exceeds the design pressure.

[0010] Preferably, a resistance block is provided between the elastic part and the valve cap, so that the contact position between the elastic part and the valve cap is larger, and the elastic force applied by the elastic part is prevented from being too concentrated on the valve cap, causing excessive local stress, thereby affecting the service life of the valve cap or causing deformation of the valve cap.

[0011] Preferably, the abutment block, valve body and valve cap are arranged in layers from the inside to the outside. The abutment block is driven by the movement of the valve cap. During the movement of the abutment block, the movement direction of the side surface of the abutment block is limited by the extension direction of the inner surface of the valve body. The inner surface of the valve cap corresponds to the outer surface of the valve body, so that the process of the valve cap moving and releasing pressure is more stable, and the operation stability of the valve cap movement is improved.

[0012] Preferably, a first moving cavity providing a moving space for the resistance block and a second moving cavity providing a deformation space for the elastic part are provided inside the valve body. The first moving cavity is provided to facilitate the movement of the resistance block. When the valve cap is subjected to a fluid pressure exceeding the design pressure, the valve cap moves to move the resistance block. The first moving cavity provides a moving space for the resistance block and limits the moving direction of the resistance block, so that the movement of the valve cap is more stable and the problem of jumping is avoided.

[0013] The second movable cavity is provided to provide a deformation space for the elastic part. The setting direction of the second movable space is consistent with the arrangement direction of the elastic part, thereby improving the operation stability of the elastic part.

[0014] Preferably, the abutment platform includes a first abutment platform and a second abutment platform arranged on one side of the first abutment platform. The second communication port is arranged in the middle of the first abutment platform. The first abutment platform and the second abutment platform are arranged to facilitate the diversion of the fluid after entering the first cavity, improve the uniformity of the force applied by the fluid on the valve cap, and thus improve the operating stability of the pressure relief valve.

[0015] Preferably, the second abutment platform is arranged in pairs, and the second abutment platform is arranged between the first abutment platform and the first connecting port. The first abutment platform, the second abutment platform, the first connecting port, and the second connecting port all have the same symmetry axis as the first cavity; after the fluid entering from the first connecting port is diverted by the second abutment platform, a relatively uniform pressure is formed in the first cavity, the force uniformity of the valve cap is improved, and when the pressure is released, the path through which the fluid passes is symmetrical, and the length of the path is consistent, thereby improving the stability of the pressure release.

[0016] Preferably, the extension lines of the setting directions of the second abutment platforms intersect each other.

[0017] Preferably, the pump chamber upper cover is provided with a water inlet connected to the water suction chamber and a water outlet connected to the water discharge chamber. During the operation of the pressure relief valve, the fluid in the water discharge chamber flows through the first connecting port, the first cavity, the second connecting port, and finally flows to the water suction chamber to complete the pressure relief.

[0018] This application has achieved beneficial technical effects:

[0019] The utility model is provided with a resistance platform, so that the fluid entering from the first connecting port can be distributed around the resistance platform, so that when the fluid under the valve cap contacts the valve cap, the pressure received by the bottom of the valve cap is more uniform, thereby avoiding the problem of the valve cap jumping due to uneven force, and avoiding the unstable operation of the pressure relief valve due to uneven pressure of the contacting fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Shown is a schematic diagram of the structure of the utility model;

[0021] Figure 2 Shown is a schematic diagram of the top view of the structure of the utility model;

[0022] Figure 3 Shown Figure 2 AA section structural diagram;

[0023] Figure 4 Shown is a bottom view structural schematic diagram of the utility model;

[0024] Figure 5 Shown Figure 4 BB-direction cross-sectional structural diagram;

[0025] Figure 6 The figure shows a schematic diagram of the top view of the pump chamber upper cover of the utility model;

[0026] Figure 7 Shown is this Figure 6 Schematic diagram of CC-section structure;

[0027] Figure 8 Shown is a schematic structural diagram of the pump chamber upper cover of the utility model;

[0028] Fig. 9 Shown is a schematic diagram of the explosion structure of the utility model;

[0029] Fig.10 Shown is another exploded structure schematic diagram of the utility model;

[0030] Fig.11 Shown is a schematic diagram of the arrangement structure of the first moving cavity and the second moving cavity.

[0031] Reference numerals

[0032] 1- pump chamber cover; 11- first cavity; 7- pressure relief valve; 71- valve body; 72- valve cap; 73- elastic part; 12- abutment platform; 5- water absorption chamber; 6- drainage chamber; 13- first connecting port; 14- second connecting port; 15- abutment ring; 721- fitting part; 74- abutment block; 711- first movable cavity; 712- second movable cavity; 121- first abutment platform; 122- second abutment platform; 123- third abutment platform; 16- water inlet; 17- water outlet; 713- first fitting surface. DETAILED DESCRIPTION

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0034] The technical solution of the utility model is described in detail below with specific embodiments.

[0035] Reference Figure 1-Figure 11 , a pressure relief valve installation structure, comprising a pump chamber upper cover 1, a pressure relief valve 7 arranged on the pump chamber upper cover 1, the pressure relief valve 7 comprising a valve body 71 connected to the pump chamber upper cover 1, a valve cap 72, and an elastic portion 73 arranged between the valve body 71 and the valve cap 72;

[0036] The pump chamber upper cover 1 is provided with a first cavity 11 that provides a moving space for the valve cap 72. The first cavity 11 is provided with a resistance platform 12 that resists the valve cap 72, a first connecting port 13 connected to the drainage chamber 6, and a second connecting port 14 connected to the water suction chamber 5. The second connecting port 14 is provided in the middle of the resistance platform 12. By setting the elastic part 73, the valve cap 72 is in continuous contact with the abutment platform 12, and the first connecting port 13 and the second connecting port 14 within the working range of pressure are prevented from being connected. When the fluid pressure in the drainage chamber 6 is relatively large, the valve cap 72 is moved to release the contact between the valve cap 72 and the abutment platform 12, and the first connecting port 13 is connected with the second connecting port 14, so that the fluid in the drainage chamber 6 higher than the design pressure can flow back from the second connecting port 14 to the water suction chamber 5, thereby completing the pressure relief and protecting the internal components of the diaphragm booster pump. The abutment platform is set so that the fluid entering from the first connecting port 13 can be distributed around the abutment platform, so that when the fluid under the valve cap contacts the valve cap, the pressure received by the bottom of the valve cap is more uniform, so that the valve cap can be prevented from jumping due to uneven force, and the operation of the pressure relief valve can be prevented from being unstable due to uneven pressure of the contacted fluid, wherein the elastic part is a spring. The cross-sectional shape of the first communication port 13 is elliptical, and the elliptical first communication port 13 is conducive to the circulation of a fluid with a large flow rate; the cross-sectional shape of the second communication port 14 is circular.

[0037] A resistance ring 15 is disposed above the first cavity (11), and a contact portion 721 is disposed on the upper outer edge of the valve cap 72 to contact the upper end of the resistance ring 15. The resistance ring 15 and the contact portion 721 are disposed simultaneously, so that the movement process of the valve cap 72 is relatively stable, and the process in which the fluid below continuously applies pressure to the valve cap 72 can also maintain stability, thereby avoiding the problem of frequent jumping of the pressure relief valve.

[0038] The valve cap 72 is sleeved on the valve body 71. The valve cap 72 is guided by the side wall of the valve body during movement, so that the valve cap moves more smoothly, avoiding the problem of the valve cap shaking during pressure relief and the problem of the valve cap shaking due to the action of fluid that exceeds the design pressure.

[0039] A resisting block 74 is provided between the elastic portion 73 and the valve cap 72 to make the contact position between the elastic portion 73 and the valve cap 72 larger, so as to avoid the elastic force applied by the elastic portion 73 being too concentrated on the valve cap 72 to cause excessive local stress, thereby affecting the service life of the valve cap 72 or causing deformation of the valve cap 72.

[0040] The abutment block 74, the valve body 71, and the valve cap 72 are arranged in layers from the inside to the outside. The movement of the valve cap 72 drives the abutment block 74. During the movement of the abutment block 74, the moving direction of the side of the abutment block 74 is limited by the extending direction of the inner surface of the valve body 71. The inner surface of the valve cap 72 corresponds to the outer surface of the valve body 71, so that the process of the valve cap 72 moving and releasing pressure is more stable, and the operation stability of the movement of the valve cap 72 is improved.

[0041] The valve body 71 is provided with a first moving cavity 711 for providing a moving space for the resistance block 74 and a second moving cavity 712 for providing a deformation space for the elastic part 73. The first moving cavity 711 is provided to facilitate the movement of the resistance block 74. When the valve cap 72 is subjected to a fluid pressure exceeding the design pressure, the valve cap 72 moves to move the resistance block 74. The first moving cavity 711 provides a moving space for the resistance block 74 and limits the moving direction of the resistance block 74, so that the movement of the valve cap 72 is more stable and the problem of jumping is avoided.

[0042] The second movable cavity 712 is provided to provide a deformation space for the elastic portion 73 . The setting direction of the second movable cavity 712 is consistent with the arrangement direction of the elastic portion 73 , thereby improving the operation stability of the elastic portion 73 .

[0043] The abutment platform 12 includes a first abutment platform 121 and a second abutment platform 122 disposed on one side of the first abutment platform 121. The second communication port 14 is disposed in the middle of the first abutment platform 121. The first abutment platform 121 and the second abutment platform 122 are disposed to facilitate the diversion of the fluid after entering the first cavity 11, improve the uniformity of the force applied by the fluid to the valve cap 72, and thus improve the operating stability of the pressure relief valve 7.

[0044] The second abutment platforms 122 are arranged in pairs, and the second abutment platforms 122 are arranged between the first abutment platforms 121 and the first communication port 13. The first abutment platforms 121, the second abutment platforms 122, the first communication port 13, and the second communication port 14 all have the same symmetry axis as the first cavity 11; after the fluid entering from the first communication port 13 is diverted by the second abutment platforms 122, a relatively uniform pressure is formed in the first cavity 11, and the force uniformity of the valve cap 72 is improved. When the pressure is released, the path through which the fluid passes is in a symmetrical state, and the length of the path is consistent, thereby improving the stability of the pressure release.

[0045] The extension lines of the setting direction of the second abutment platform 122 intersect each other, so that the second abutment platform 122 has a certain angle, which has a diversion effect on the fluid; the fluid enters through the first connecting port 13 and is diverted, so that the position where the valve cap 72 contacts the fluid has a more balanced force point, thus avoiding the problem of uneven force.

[0046] The pump chamber upper cover 1 is provided with a water inlet 16 connected to the water suction chamber 5 and a water outlet 17 connected to the water discharge chamber 6. During the operation of the pressure relief valve, the fluid in the water discharge chamber 6 flows through the first communication port 13, the first cavity 11, the second communication port 14, and finally flows to the water suction chamber 5 to complete the pressure relief.

[0047] The valve body 71 is provided with a first fitting surface 713 which fits with the upper cover of the pump chamber to improve the sealing degree between the valve body and the upper cover of the pump chamber. The first fitting surface is arranged opposite to the upper end of the valve cap 72, and the end of the valve body 71 is arranged opposite to the bottom inside the valve cap 72.

[0048] After testing, when the sealing pressure of this application is adjusted to 170psi, the spring pressure needs to be 7.8KG.

[0049] The abutment platform 12 further includes a third abutment platform 123, which abuts against the peripheral edge of the bottom of the valve cap 72, wherein the upper planes of the first abutment platform 121, the second abutment platform 122, and the third abutment platform 123 are all flush with each other, wherein the third abutment platform 123 is arranged at the periphery of the first connecting port 13, so that the fluid can flow at the bottom of the valve cap 72, thereby improving the operating stability of the valve cap 72; the third abutment platform 123 is arranged so that the valve cap 72 has multiple abutment positions, thereby improving the sealing degree between the valve cap 72 and the pump chamber upper cover 1 when the pressure of the fluid is lower than the design pressure.

[0050] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

[0052] The above is a detailed description of an embodiment of the installation structure of a pressure relief valve provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A pressure relief valve installation structure, comprising a pump chamber upper cover (1), and a pressure relief valve (7) arranged on the pump chamber upper cover (1), characterized in that: The pressure relief valve (7) comprises a valve body (71) connected to the pump chamber upper cover (1), a valve cap (72), and an elastic portion (73) arranged between the valve body (71) and the valve cap (72); The pump chamber upper cover (1) is provided with a first cavity (11) for providing a moving space for the valve cap (72); the first cavity (11) is provided with a resistance platform (12) that resists the valve cap (72), a first connecting port (13) connected to the drainage chamber (6), and a second connecting port (14) connected to the water suction chamber (5); the second connecting port (14) is provided in the middle of the resistance platform (12).

2. The installation structure of the pressure relief valve according to claim 1, characterized in that: A resistance ring (15) is arranged above the first cavity (11), and a fitting portion (721) that resists against the upper end of the resistance ring (15) is arranged on the upper outer edge of the valve cap (72).

3. The installation structure of the pressure relief valve according to claim 1, characterized in that: The valve cap (72) is sleeved on the valve body (71).

4. The installation structure of the pressure relief valve according to claim 3, characterized in that: A resistance block (74) is provided between the elastic portion (73) and the valve cap (72).

5. The installation structure of the pressure relief valve according to claim 4, characterized in that: The resistance block (74), the valve body (71) and the valve cap (72) are arranged in layers from the inside to the outside.

6. The installation structure of the pressure relief valve according to claim 4, characterized in that: The valve body (71) is provided with a first moving cavity (711) providing a moving space for the resistance block (74) and a second moving cavity (712) providing a deformation space for the elastic part (73) inside.

7. The installation structure of the pressure relief valve according to claim 1, characterized in that: The abutment platform (12) comprises a first abutment platform (121) and a second abutment platform (122) arranged on one side of the first abutment platform (121).

8. The installation structure of the pressure relief valve according to claim 7, characterized in that: The second abutment platforms (122) are arranged in pairs, and the second abutment platforms (122) are arranged between the first abutment platforms (121) and the first communication port (13).

9. The installation structure of the pressure relief valve according to claim 8, characterized in that: The extension lines of the arrangement directions of the second abutment platforms (122) intersect each other.

10. The installation structure of the pressure relief valve according to claim 1, characterized in that: The pump chamber upper cover (1) is provided with a water inlet (16) connected to the water suction chamber (5) and a water outlet (17) connected to the water discharge chamber (6).

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