CN209762384U - Anti-siphon valve - Google Patents
Anti-siphon valve Download PDFInfo
- Publication number
- CN209762384U CN209762384U CN201920338733.4U CN201920338733U CN209762384U CN 209762384 U CN209762384 U CN 209762384U CN 201920338733 U CN201920338733 U CN 201920338733U CN 209762384 U CN209762384 U CN 209762384U
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- valve body
- inner chamber
- siphon
- valve plate
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Abstract
The utility model aims at providing a lower anti-siphon valve of valve opening pressure. In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides an anti-siphon valve, is including the valve body that has the inner chamber, the valve body is formed with the valve body inner chamber, be formed with inlet and the liquid outlet that is linked together with the valve body inner chamber on the valve body, be equipped with the valve rod in the valve body, the valve rod upper end is fixed with the valve plate, the valve rod lower extreme is fixed with seal assembly, seal assembly separates the valve body inner chamber for first inner chamber and second inner chamber, and liquid loops through inlet, first inner chamber, liquid outlet in order to derive the valve body, the second inner chamber communicates with each other with the atmosphere, the valve plate rebound is in order to open the liquid outlet, the valve plate moves down in order to seal the liquid outlet, when the inlet feed liquor so that is full of liquid in the first inner chamber, seal.
Description
Technical Field
The utility model relates to an anti-siphon valve used in an oil filling system of an overground oil storage tank or a skid-mounted tank and a self-suction type oiling machine.
Background
In the current finished fuel industry, various overground oil storage tanks are used in the process of transferring and conveying oil products, and an anti-siphon valve is arranged in an oil outlet pipeline in order to ensure the safety of the stored fuel in the oil storage tanks. When the valve of the oil outlet on the oil outlet pipe fails or any one of the pipelines is broken, the anti-siphon valve can overcome the siphon phenomenon caused by liquid level difference, and the economic loss and the environmental pollution caused by fuel leakage are avoided.
The prior anti-siphon valve comprises a compression spring and a valve piston which is opposite to the siphon direction, wherein the elastic force of the spring is larger than the siphon pressure (F > Delta H ∙ rho ∙ g ∙ S) under the condition of the highest liquid level difference, so that the fuel is prevented from leaking through the anti-siphon valve. When the self-priming pump at the downstream of the oil outlet pipeline is started, the negative pressure generated by the pump needs to overcome the difference between the elastic force of the spring and the siphon pressure, so that the anti-siphon valve can be opened, and the fuel oil transmission is realized. The spring strength of the anti-siphon valve needs to be matched with the applied ground oil tank and the oil filling system, and the spring elasticity is enough to overcome the siphon pressure generated when the liquid level in the tank is at the highest point. However, when the liquid level in the tank is at the lowest point, the siphon pressure is reduced, the elastic force of the spring is unchanged, the opening pressure of the valve of the anti-siphon valve is increased, namely the upstream liquid resistance of the self-priming pump is increased, and the flow of the system is limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a lower anti-siphon valve of valve opening pressure.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides an anti-siphon valve, is including the valve body that has the inner chamber, the valve body is formed with the valve body inner chamber, be formed with inlet and the liquid outlet that is linked together with the valve body inner chamber on the valve body, be equipped with the valve rod in the valve body, the valve rod upper end is fixed with the valve plate, the valve rod lower extreme is fixed with seal assembly, seal assembly separates the valve body inner chamber for first inner chamber and second inner chamber, and liquid loops through inlet, first inner chamber, liquid outlet in order to derive the valve body, the second inner chamber communicates with each other with the atmosphere, the valve plate rebound is in order to open the liquid outlet, the valve plate moves down in order to seal the liquid outlet, when the inlet feed liquor so that is full of liquid in the first inner chamber, seal.
Because the pressure applied to the sealing assembly is greater than the pressure applied to the valve plate, the sealing assembly can drive the valve rod to move downwards so that the valve plate seals the liquid outlet, so that the valve has the anti-siphon function; when the oil tank is required to discharge oil, the self-sucking pump is opened to enable the liquid outlet of the valve body to have negative pressure, and the sealing assembly and the valve rod can move upwards under the action of atmospheric pressure because the second inner cavity of the valve body is connected with the atmosphere, so that the valve plate can open the liquid outlet. The smaller the difference between the pressure area of the sealing assembly and the pressure area of the valve plate is, the smaller the power required by the negative pressure generated by the self-priming pump is, and the valve opening pressure provided by the self-priming pump is constant regardless of the siphon pressure. Use the utility model discloses the oil tank of valve can adopt the less self priming pump of power to it is smooth and easy to keep out oil.
Preferably, a compression spring is arranged in the first inner cavity, the compression spring is sleeved on the valve rod, a fixing part located on the axial side of the compression spring is arranged in the valve body, one axial end of the compression spring abuts against the fixing part, and the other axial end of the compression spring abuts against the sealing assembly.
The setting of compression spring can keep valve plate to the sealed of liquid outlet when anti-siphon valve installation throughout, and the valve plate can be to the sealed of liquid outlet when oil-free or when lack of oil in the oil tank. Wherein a low force spring may be used to reduce the burden on the self-priming pump.
Preferably, the sealing assembly comprises a diaphragm, the peripheral outer edge of the diaphragm is fixed with the valve body, and the middle of the diaphragm is fixed and linked with the valve rod.
The arrangement of the diaphragm can reduce the damping of the valve rod during axial movement so as to further reduce the valve opening pressure generated by the self-sucking pump.
Preferably, the valve plate is provided with a pressure relief hole which penetrates through the valve plate from top to bottom, and a thermal expansion relief valve is arranged in the pressure relief hole.
Under the high temperature condition, the fuel in the oil circuit can rise and take place thermal expansion because of the temperature, can lead to the damaged or damage oil pipe low reaches subassembly of play of oil pipe excessive pressure of oil tank, the utility model discloses thermal expansion relief valve can be opened when higher temperature to make the fuel conduction flow back to the oil tank, with protection oil pipe and low reaches subassembly. And selecting a proper thermal expansion relief valve according to actual needs, so that the thermal expansion relief valve can be opened under a constant pressure.
Preferably, the inner diameter of the liquid outlet is gradually reduced from top to bottom, the valve plate comprises an upper valve plate part and a lower valve plate part, at least the lower valve plate part is of a structure with the outer diameter gradually reduced from top to bottom, a sealing ring is matched between the lower valve plate part and the liquid outlet, and the sealing ring is fixed with the valve body or the valve plate; the outer diameter of the upper part of the valve plate is larger than the inner diameter of the liquid outlet and the outer diameter of the lower part of the valve plate.
Wherein, the design of liquid outlet and valve plate is so that improve sealed effect. The outer diameter of the upper portion of the valve plate is larger than that of the lower portion of the valve plate, so that the moving stroke of the valve rod is limited, and the valve plate is prevented from penetrating through the liquid outlet downwards.
Preferably, the sealing assembly further comprises a first pressing block and a second pressing block, the diaphragm, the first pressing block and the second pressing block are all provided with center holes matched with the valve rod, the first pressing block and the second pressing block are fixed with the valve rod, the middle of the diaphragm is limited between the first pressing block and the second pressing block, the first pressing block is located in the first cavity, and the second pressing block is located in the second cavity.
The arrangement makes the fixation and linkage of the diaphragm and the valve rod more convenient.
Preferably, the valve rod consists of an upper valve rod section, a middle valve rod section and a lower valve rod section, the diameter of the middle valve rod section is larger than that of the upper valve rod section and that of the lower valve rod section, the valve plate is provided with a threaded structure matched with the upper valve rod section, the central hole of the first pressure block is a through hole, the central hole of the second pressure block is a threaded hole and is provided with a threaded structure matched with the lower valve rod section, when two ends of the valve rod are respectively fixed with the valve plate and the second pressure block in a threaded manner, a step surface formed by the middle valve rod section and the upper valve rod section is contacted with the lower end surface of the valve plate, and a step surface formed by the middle valve rod section and; the valve body comprises an upper valve body and a lower valve body, and the peripheral outer edge of the diaphragm is clamped and fixed between the lower end face of the upper valve body and the upper end face of the lower valve body.
The above arrangement makes the assembly of the valve parts simpler and more convenient.
Preferably, the fixing portion is provided with a guide hole penetrating vertically, and the valve rod is slidably fitted in the guide hole.
The fixing part is used for supporting the compression spring and guiding the valve rod so as to avoid the lower end of the valve rod from shaking. The thickness of the fixing part is set according to actual needs so as to avoid inclination of the valve rod relative to the axis of the valve body. The fixing part has a certain thickness and can also be used for the upper limit of the sealing component so as to avoid over-compression of the compression spring or tearing of the diaphragm.
As preferred, the valve body includes valve body upper segment, valve body middle section and valve body hypomere along the axial in proper order, the valve plate is located the valve body upper segment, be equipped with between valve body upper segment and the valve body middle section the liquid outlet, the valve body middle section is equipped with the inlet, a plurality of inlets are the even interval of annular and set up on valve body middle section circumference valve wall, seal assembly set up in the valve body hypomere. The above arrangement makes the valve structure of the utility model is simpler.
Preferably, the sealing assembly is provided with a lower protrusion extending upwards, the fixing portion is provided with an upper protrusion extending downwards, and two ends of the compression spring are respectively sleeved on the outer sides of the upper protrusion and the lower protrusion.
The utility model has the advantages of make the less and invariable of valve cracking pressure.
Drawings
FIG. 1 is a cross-sectional view of the present invention
Fig. 2 is a schematic structural view of the valve body of the present invention;
Fig. 3 is a cross-sectional view of the valve body of the present invention
Fig. 4 is a schematic structural diagram of the valve rod of the present invention.
Wherein, 10-an upper valve body; 20-a lower valve body; 101-the upper valve body section and 102-the middle valve body section; 103-a lower valve body section; 104-a fixed part; 11-a liquid inlet; 12-a liquid outlet; 13-a first lumen; 14-a second lumen; 15-connecting holes; 16-connecting lines; 17-upper bump; 2-a valve stem; 21-upper section of valve stem; 22-valve stem middle section; 23-lower section of valve stem; 3-a valve plate; 31-relief holes; 32-sealing ring; 301-valve plate upper part; 302-lower part of valve plate; 4-compression spring; 5-membrane, 6-first briquetting; 61-lower protrusion; 7-second briquetting; 8-thermal expansion relief valve.
Detailed Description
The invention will be further described with reference to the drawings and the specific embodiments.
The utility model discloses an anti-siphon valve for oil storage tank or sled tinning and collocation have from inhaling among the refueling system of inhaling formula tanker aircraft on the ground.
By figure 1, figure 2, figure 3, shown in figure 4, the utility model discloses an anti-siphon valve is including the valve body that has the inner chamber, the valve body is formed with the valve body inner chamber, be formed with inlet 11 and the liquid outlet 12 that are linked together with the valve body inner chamber on the valve body, be equipped with valve rod 2 in the valve body, 2 upper ends of valve rod are fixed with valve plate 3, 2 lower extremes of valve rod are fixed with seal assembly, seal assembly separates the valve body inner chamber for first inner chamber 13 and second inner chamber 14, liquid (fuel) loop through inlet 11, first inner chamber 13, liquid outlet 12 is in order to derive the valve body, second inner chamber 14 communicates with each other with the atmosphere, valve plate 3 rebound is in order to open liquid outlet 12, valve plate 3 rebound is in order to seal liquid outlet 12, when 11 feed liquor in order to make first inner chamber 13 fill with liquid, seal assembly.
The utility model discloses a valve body includes valve body upper segment 101, valve body middle section 102 and valve body hypomere 103 along the axial in proper order, and valve plate 3 is located valve body upper segment 101, is equipped with between valve body upper segment 101 and valve body middle section 102 liquid outlet 12, valve body middle section 102 are equipped with a plurality of inlet 11, a plurality of inlet 11 are the even interval of annular and set up on valve body middle section 102 circumference valve wall, and seal assembly sets up in valve body hypomere 103. Wherein, the circumferential valve wall of the lower section 103 of the valve body is provided with a connecting hole 15, and the connecting hole 15 is communicated with the second inner cavity 14.
A fixing part 104 is arranged between the valve body middle section 102 and the valve body lower section 103, and the fixing part 104 is provided with a plurality of connecting pipelines 16 which enable the first inner cavity of the valve body middle section 102 to be communicated with the first inner cavity of the valve body lower section 103. A compression spring 4 is arranged in a first inner cavity of the lower section 103 of the valve body, the compression spring 4 is sleeved on the valve rod 2, the fixing part 104 is located on the upper side of the compression spring 4 in the axial direction, the sealing component is located on the lower side of the compression spring 4 in the axial direction, one end of the compression spring 4 in the axial direction is abutted against the fixing part 104, and the other end of the compression spring 4 in the axial direction is abutted against the sealing component. Wherein, the center of the fixing part 104 is provided with a guide hole 18 which penetrates up and down, and the valve rod 2 is arranged in the guide hole 18 in a sliding way.
The sealing assembly comprises a diaphragm 5, a first pressing block 6 and a second pressing block 7, the diaphragm 5, the first pressing block 6 and the second pressing block 7 are all formed with center holes matched with the valve rod 2, the first pressing block 5 and the second pressing block 6 are fixed with the valve rod 2, the circumferential outer edge of the diaphragm 5 is fixed with the valve body, and the middle of the diaphragm 5 is fixed and linked with the valve rod 2. The diaphragm 5 is centrally confined between a first pressure piece 5 and a second pressure piece 6, the first pressure piece 5 being located in the first chamber 13 and the second pressure piece 6 being located in the second chamber 14. The diaphragm of the present embodiment is made of rubber or latex. The first pressing block 5 is formed with a lower protrusion 61 extending upward, the fixing portion 104 is formed with an upper protrusion 17 extending downward, and both ends of the compression spring 4 are respectively sleeved on the circumferential outer sides of the upper protrusion 17 and the lower protrusion 61.
The valve rod 2 is composed of a valve rod upper section 21, a valve rod middle section 22 and a valve rod lower section 23, the diameter of the valve rod middle section 22 is larger than the diameter of the valve rod upper section 21 and the diameter of the valve rod lower section 23, the valve plate 3 is provided with a thread structure matched with the valve rod upper section 21, a center hole of the first pressing block 6 is a through hole, a center hole of the second pressing block 7 is a threaded hole and is provided with a thread structure matched with the valve rod lower section 23, when two ends of the valve rod 2 are respectively fixed with the valve plate 3 and the second pressing block 7 in a threaded mode, a step surface formed by the valve rod middle section 22 and the valve rod upper section 21 is in contact with the lower end surface of the valve plate 3, and a step surface. The valve body comprises an upper valve body 10 and a lower valve body 20, the peripheral outer edge of the diaphragm 5 is clamped and fixed between the lower end face of the upper valve body 10 and the upper end face of the lower valve body 20, and the upper valve body 10 and the lower valve body 20 are locked and fixed together through a fastening piece. The upper valve body section 101, the middle valve body section 102 and part of the lower valve body section form an upper valve body 10, and the other part of the lower valve body section forms a lower valve body 20.
The valve plate 3 is provided with a pressure relief hole 31 which penetrates up and down, and a thermal expansion relief valve 8 is arranged in the pressure relief hole 31. Liquid outlet 12 is the structure that from top to bottom internal diameter reduces gradually, and valve plate 3 includes valve plate upper portion 301 and valve plate lower part 302, and valve plate lower part 302 is the structure that from top to bottom external diameter reduces gradually, and the cooperation has sealing washer 32 between valve plate lower part 302 and liquid outlet 12, and the sealing washer 32 cover is established and is fixed in valve plate lower part 302 week, and valve plate upper portion 301 maximum external diameter is greater than the maximum internal diameter of liquid outlet 12 and the maximum external diameter of valve plate lower part 302.
Because seal assembly's lifting surface area is greater than the lifting surface area of valve plate, seal assembly receives fluid pressure can drive the valve rod downstream to make the valve plate sealed the utility model discloses the liquid outlet of valve, no matter the liquid level height in the oil tank, the oil-out can be sealed all the time to the valve plate. Because the utility model discloses be provided with compression spring, under compression spring's effect, seal assembly has the tendency power of lapse all the time, assists through compression spring to guarantee the sealed effect of valve plate to the liquid outlet. The utility model discloses a self priming pump among the refueling system only needs to produce less negative pressure in valve body liquid outlet low reaches department and just enables the oil promotion valve plate in the valve body and rises, and the opening pressure that the self priming pump will make anti-siphon valve open is less. The utility model has the advantages of make the less and invariable of valve cracking pressure.
Claims (10)
1. The utility model provides an anti-siphon valve, its characterized in that is including the valve body that has the inner chamber, the valve body is formed with the valve body inner chamber, be formed with inlet and the liquid outlet that is linked together with the valve body inner chamber on the valve body, be equipped with the valve rod in the valve body, the valve rod upper end is fixed with the valve plate, the valve rod lower extreme is fixed with seal assembly, seal assembly separates the valve body inner chamber for first inner chamber and second inner chamber, and liquid loops through inlet, first inner chamber, liquid outlet in order to derive the valve body, the second inner chamber communicates with each other with the atmosphere, the valve plate rebound is in order to open the liquid outlet, the valve plate moves down in order to seal the liquid outlet, when the inlet feed liquor is so that to fill with liquid in the first inner chamber.
2. The anti-siphon valve according to claim 1, wherein the first inner chamber is provided with a compression spring therein, the compression spring is sleeved on the valve rod, the valve body is provided with a fixing portion located at an axial side of the compression spring therein, one axial end of the compression spring abuts against the fixing portion, and the other axial end of the compression spring abuts against the sealing component.
3. The anti-siphon valve of claim 1, wherein the sealing assembly comprises a diaphragm, the circumferential outer edge of the diaphragm is fixed to the valve body, and the middle portion of the diaphragm is fixed to and interlocked with the valve stem.
4. The anti-siphon valve according to claim 1, wherein the valve plate is provided with a pressure relief hole penetrating vertically, and a thermal expansion relief valve is provided in the pressure relief hole.
5. the anti-siphon valve according to claim 1, wherein the liquid outlet has a structure with an inner diameter gradually decreasing from top to bottom, the valve plate comprises an upper valve plate portion and a lower valve plate portion, at least the lower valve plate portion has a structure with an outer diameter gradually decreasing from top to bottom, a sealing ring is fitted between the lower valve plate portion and the liquid outlet, and the sealing ring is fixed to the valve body or the valve plate; the outer diameter of the upper part of the valve plate is larger than the inner diameter of the liquid outlet and the outer diameter of the lower part of the valve plate.
6. The anti-siphon valve according to claim 3, wherein the sealing assembly further comprises a first pressing block and a second pressing block, the diaphragm, the first pressing block and the second pressing block are formed with central holes for fitting the valve stem, the first pressing block and the second pressing block are fixed with the valve stem, the middle portion of the diaphragm is limited between the first pressing block and the second pressing block, the first pressing block is located in the first chamber, and the second pressing block is located in the second chamber.
7. The anti-siphon valve according to claim 6, wherein the valve stem is composed of a valve stem upper segment, a valve stem middle segment and a valve stem lower segment, the diameter of the valve stem middle segment is larger than the diameter of the valve stem upper segment and the diameter of the valve stem lower segment, the valve plate is formed with a screw thread structure engaged with the valve stem upper segment, the center hole of the first pressure block is a through hole, the center hole of the second pressure block is a screw hole and is formed with a screw thread structure engaged with the valve stem lower segment, when both ends of the valve stem are respectively screwed with the valve plate and the second pressure block, the step surface formed by the valve stem middle segment and the valve stem upper segment is in contact with the valve plate lower end surface, and the step surface formed by the valve plate middle segment and the; the valve body comprises an upper valve body and a lower valve body, and the peripheral outer edge of the diaphragm is clamped and fixed between the lower end face of the upper valve body and the upper end face of the lower valve body.
8. The anti-siphon valve according to claim 2, wherein the fixing portion is provided with a guide hole extending vertically therethrough, and the valve rod is slidably fitted in the guide hole.
9. The anti-siphon valve according to claim 1, wherein the valve body comprises an upper valve body section, a middle valve body section and a lower valve body section in sequence along the axial direction, the valve plate is located in the upper valve body section, the liquid outlets are arranged between the upper valve body section and the middle valve body section, the middle valve body section is provided with the liquid inlets, a plurality of liquid inlets are arranged on the circumferential valve wall of the middle valve body section at uniform intervals in an annular shape, and the sealing assembly is arranged in the lower valve body section.
10. The anti-siphon valve according to claim 2, wherein the sealing member is formed with a lower protrusion extending upward, the fixing portion is formed with an upper protrusion extending downward, and both ends of the compression spring are respectively fitted around the outer sides of the upper protrusion and the lower protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920338733.4U CN209762384U (en) | 2019-03-18 | 2019-03-18 | Anti-siphon valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920338733.4U CN209762384U (en) | 2019-03-18 | 2019-03-18 | Anti-siphon valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209762384U true CN209762384U (en) | 2019-12-10 |
Family
ID=68754974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920338733.4U Active CN209762384U (en) | 2019-03-18 | 2019-03-18 | Anti-siphon valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209762384U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109780291A (en) * | 2019-03-18 | 2019-05-21 | 张家港坦力机电设备有限公司 | Anti- siphon valve |
-
2019
- 2019-03-18 CN CN201920338733.4U patent/CN209762384U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109780291A (en) * | 2019-03-18 | 2019-05-21 | 张家港坦力机电设备有限公司 | Anti- siphon valve |
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