CN216692327U - Self-operated negative pressure regulating valve - Google Patents
Self-operated negative pressure regulating valve Download PDFInfo
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- CN216692327U CN216692327U CN202220055283.XU CN202220055283U CN216692327U CN 216692327 U CN216692327 U CN 216692327U CN 202220055283 U CN202220055283 U CN 202220055283U CN 216692327 U CN216692327 U CN 216692327U
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Abstract
The utility model discloses a self-operated negative pressure regulating valve, which comprises a valve body, an upper negative pressure feedback chamber and an atmospheric chamber, lower negative pressure feedback room and support, the valve body has entry and export, in the valve body, position between entry and export is provided with the disk seat, the disk seat can be through the case shutoff of connecting at the valve rod, it sets up the below at the valve body to go up negative pressure feedback room, the atmosphere room sets up the below at last negative pressure feedback room, lower negative pressure feedback room sets up the below at the atmosphere chamber, the support supports the below at lower negative pressure feedback room, go up negative pressure feedback room and lower negative pressure feedback room and all seted up the feedback mouth, the one end of going up negative pressure feedback room is last diaphragm assembly, the one end of lower negative pressure feedback room is lower diaphragm assembly, the valve rod passes last negative pressure feedback room, atmosphere room and lower negative pressure feedback room and with last diaphragm assembly and lower diaphragm assembly be connected, the end of valve rod is provided with the balancing weight. The utility model can conveniently realize the automatic adjustment of the pressure of the glove box.
Description
Technical Field
The utility model relates to a regulating valve, in particular to a self-operated negative pressure regulating valve.
Background
The self-operated negative pressure regulating valve (hereinafter referred to as "regulating valve") is mainly used for regulating the pressure in the glove box. The inlet end of the regulating valve is connected with the glove box, the outlet end of the regulating valve is connected with the vacuum pump or the negative pressure pipeline, and a piezometric tube is led out from the glove box and connected with a control capsule feedback chamber of the regulating valve. The negative pressure in the glove box is adjusted by controlling the flow rate extracted from the glove box through the vertical movement of a valve core in the adjusting valve, so that the pressure in the glove box is kept in a stable negative pressure region, and the gas medium in the glove box is prevented from overflowing and damaging operators.
The existing regulating valve has no automatic regulating function, and brings inconvenience when in use.
Disclosure of Invention
The utility model aims to solve the technical problem that in order to overcome the defects in the prior art, a self-operated negative pressure regulating valve is provided, and the self-operated negative pressure regulating valve can be automatically regulated based on the negative pressure condition of a glove box.
In order to solve the technical problems, the utility model adopts the technical scheme that: a self-operated negative pressure regulating valve comprises a valve body, an upper negative pressure feedback chamber, an atmosphere chamber, a lower negative pressure feedback chamber and a support, wherein the valve body is provided with an inlet and an outlet, a valve seat is arranged in the valve body between the inlet and the outlet and can be plugged by a valve core connected with a valve rod, the upper negative pressure feedback chamber is arranged below the valve body, the atmosphere chamber is arranged below the upper negative pressure feedback chamber, the lower negative pressure feedback chamber is arranged below the atmosphere chamber, the support is supported below the lower negative pressure feedback chamber, the upper negative pressure feedback chamber and the lower negative pressure feedback chamber are both provided with feedback ports, one end of the upper negative pressure feedback chamber is an upper diaphragm component, one end of the lower negative pressure feedback chamber is a lower diaphragm component, and the valve rod passes through the upper negative pressure feedback chamber, the atmosphere chamber and the lower negative pressure feedback chamber and is connected with the upper diaphragm component and the lower diaphragm component, and a balancing weight is arranged at the tail end of the valve rod.
Preferably, the valve rod is connected with the valve core by a ball head.
Preferably, an upper corrugated pipe is arranged in the valve body, and the upper corrugated pipe is sleeved on the outer side of the valve rod and separates air pressure of the inlet and the outlet.
Preferably, a lower corrugated pipe is arranged in the atmosphere chamber, the lower corrugated pipe is sleeved on the outer side of the valve rod, and the lower corrugated pipe serves as a negative pressure channel and can verify the up-and-down movement of the valve rod.
Preferably, the upper diaphragm assembly is disposed at a lower end of the upper negative pressure feedback chamber.
Preferably, the lower diaphragm assembly is disposed at a lower end of the lower negative pressure feedback chamber.
Preferably, the upper diaphragm component and the lower diaphragm component are both made of ethylene propylene diene monomer.
Preferably, be provided with travel switch on the support, the balancing weight top is provided with the baffle, travel switch is through touching the extreme position early warning is realized to the baffle.
Preferably, a waist-shaped hole extending along the longitudinal direction is formed in the support, and the travel switch is fixed through a threaded connecting piece penetrating through the waist-shaped hole.
The self-operated negative pressure regulating valve has the following beneficial effects: when the negative pressure in the glove box is higher than the set negative pressure, the pressure generated by the pressure difference between the upper diaphragm assembly and the lower diaphragm assembly enables the upper diaphragm assembly and the lower diaphragm assembly to move upwards, the valve core moves upwards, the opening of the valve is reduced, the flow of a medium passing through the regulating valve is reduced, and the pressure in the glove box rises to finally reach the set negative pressure range; when the negative pressure in the glove box is lower than the set negative pressure, the valve core can be driven to move downwards under the action of the valve balancing weight, the opening degree of the valve is increased, the flow of a medium passing through the regulating valve is increased, the extraction flow at the outlet of the glove box is increased, and the pressure in the glove box is reduced to finally reach the set negative pressure range. The valve rod is connected with the valve core by a ball head, so that the valve rod can have an automatic alignment function. The mode that the governing valve adopted upper diaphragm subassembly and lower diaphragm assembly can adjust when the little change of glove box internal pressure appears, and it has higher sensitivity.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a sectional view of an embodiment of a self-operated negative pressure regulator valve according to the present invention.
1-a scaffold; 2-a balancing weight; 3-a baffle plate; 4-lower membrane assembly; 5-upper membrane assembly; 6-valve stem; 7-a valve body; 8-valve core; 9-valve seat; 10-upper bellows; 11-lower bellows; 12-a travel switch; 13-waist-shaped hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments and the accompanying drawings.
Referring to fig. 1, the self-operated negative pressure regulating valve of the present invention includes a valve body 7, an upper negative pressure feedback chamber D, an atmospheric chamber B, a lower negative pressure feedback chamber a, and a support 1.
As shown in fig. 1, the valve body 7 has an inlet port, which is located at the right side in the drawing and is connected to the glove box, and an outlet port, which is located at the top in the drawing and is connected to a negative pressure pump or the like.
A valve seat 9 is provided in the valve body 7 at a position between the inlet of the valve body 7 and the outlet of the valve body 7, and the valve seat 9 can be closed by a valve element 8 connected to the valve rod 6. When the valve core 8 is blocked on the valve seat 9, the inlet and the outlet of the valve body 7 are not communicated; when the valve core 8 leaves the valve seat 9, the inlet and the outlet of the valve body 7 are communicated, and the negative pressure pump can apply negative pressure to the valve body 7, so that negative pressure is generated to the glove box.
The upper negative pressure feedback chamber D is provided below the valve body 7, and as shown in the drawing, an upper negative pressure feedback chamber D is formed below the valve body 7. The atmospheric chamber B is arranged below the upper negative pressure feedback chamber D, the lower negative pressure feedback chamber A is arranged below the atmospheric chamber B, and the support 1 is supported below the lower negative pressure feedback chamber A. The upper negative pressure feedback chamber D and the lower negative pressure feedback chamber A are both provided with feedback ports, and the feedback ports are connected with pressure taking ports which are far away from the inlet and outlet positions of the glove box.
One end of the upper negative pressure feedback chamber D is provided with an upper diaphragm assembly 5, and one end of the lower negative pressure feedback chamber A is provided with a lower diaphragm assembly 4. Preferably, the upper diaphragm assembly 5 is disposed at the lower end of the upper negative pressure feedback chamber D, i.e., at a position close to the atmospheric chamber B; the lower diaphragm assembly 4 is disposed at the lower end of the lower negative pressure feedback chamber a. In addition, the upper diaphragm assembly 5 and the lower diaphragm assembly 4 are preferably made of ethylene propylene diene monomer.
In the present embodiment, the connection between the valve stem 6 and the valve element 8 is preferably a ball joint connection. The top end of the valve rod 6 is a ball head which is arranged at the bottom of the valve core 8.
The valve rod 6 penetrates through the upper negative pressure feedback chamber D, the atmosphere chamber B and the lower negative pressure feedback chamber A and is connected with the upper diaphragm assembly 5 and the lower diaphragm assembly 4, and the tail end of the valve rod 6 is provided with the balancing weight 2. As shown in the drawing, the top end of the valve rod 6 is connected with the valve core 8 and then penetrates downward into the upper negative pressure feedback chamber D, and in the upper negative pressure feedback chamber D, the valve rod 6 is connected with the upper diaphragm assembly 5 at the lower end and penetrates through the other end of the upper negative pressure feedback chamber D. The valve rod 6 passes through the upper negative pressure feedback chamber D, then penetrates into the atmosphere chamber B, and then penetrates into the lower negative pressure feedback chamber a, and similarly, the valve rod 6 is connected to the lower diaphragm member 4 at the lower end, and penetrates through the other end of the lower negative pressure feedback chamber a. I.e. the valve stem 6 is connected to the upper and lower diaphragm assemblies 5, 4, and passes through the other.
As shown in fig. 1, an upper bellows 10 is arranged in the valve body 7, the upper bellows 10 is sleeved outside the valve rod 6 and separates the air pressure of the inlet and the air pressure of the outlet, and the upper bellows 10 is made of ethylene propylene diene monomer.
Similarly, a lower corrugated pipe 11 is arranged in the atmosphere chamber B, the lower corrugated pipe 11 is sleeved outside the valve rod 6, the lower corrugated pipe 11 serves as a negative pressure channel and can move up and down along the valve rod 6, and the lower corrugated pipe 11 is made of ethylene propylene diene monomer.
As shown in the figure, in order to control the position of the valve core 8 conveniently, a travel switch 12 is arranged on the support 1, a baffle 3 is arranged above the balancing weight 2, and the travel switch 12 achieves early warning of the limit position by touching the baffle 3. Namely, when the switch positions of the valve core 8 and the valve rod 6 reach the limit, the alarm is given.
In order to adjust the position of the travel switch 12, a longitudinally extending waist-shaped hole 13 is formed in the bracket 1, and the travel switch 12 is fixed through a threaded connector penetrating through the waist-shaped hole 13.
The principle of the utility model is as follows: an inlet (N cavity) of the adjusting valve is connected with the glove box, an outlet (M cavity) of the adjusting valve is connected with the negative pressure pump, a pressure taking port is arranged at an inlet and an outlet far away from the glove box, and the pressure taking port is connected with feedback chambers (an upper negative pressure feedback chamber D and a lower negative pressure feedback chamber A) of the adjusting valve.
The pressure in the glove box is set according to the weight of the balancing weight 2, when the weight of the balancing weight 2 is set to a certain degree, the valve core 8 is separated from the valve seat 9 because the balancing weight 2 is connected with the valve rod 6 and the valve core 8, and air in the glove box flows through the valve seat 9 through the cavity (N cavity) and then enters the cavity (M cavity) to be pumped into a vacuum pump or a negative pressure pipeline system. The balancing weight 2 is in a certain proportional relation with the negative pressure in the glove box.
When a certain weight of the balancing weight 2 is set, the balancing weight 2 drives the valve rod 6, the valve core 8 moves downwards, the valve core 8 is separated from the valve seat 9, air in the glove box passes through the chamber (N chamber) and the valve seat 9, and is pumped out to a vacuum pump or a negative pressure pipeline system through the chamber (M chamber), the absolute pressure in the glove box is reduced along with the time extension, the absolute pressure in a pressure taking port connected with the glove box is reduced, the upper membrane assembly 5 and the lower membrane assembly 4 drive the balancing weight 2, the valve rod 6 and the valve core 8 to move upwards under the action of certain absolute negative pressure, the valve core 8 is close to the valve seat 9, and the negative pressure value in the glove box and the force of the balancing weight 2 acting on the membrane are balanced.
When the negative pressure in the glove box is higher than the set negative pressure, the pressure generated by the pressure difference on the upper diaphragm assembly 5 and the lower diaphragm assembly 4 of the regulating valve makes the regulating valve move upwards, the valve core 8 moves upwards, and the opening degree of the valve is reduced. The flow of the medium passing through the regulating valve is reduced, and the pressure in the glove box is increased to finally reach the set negative pressure range.
When the negative pressure in the glove box is lower than the set negative pressure, the valve core 8 can be driven to move downwards under the action of the valve balancing weight 2, and the opening degree of the valve is increased. The medium flow that the governing valve passed through becomes big, and the extraction flow in glove box exit increases, and the pressure reduction in the case finally reaches the settlement negative pressure scope.
The following functions can be realized by using the regulating valve of the utility model:
1. the regulating valve can automatically regulate pressure within a certain range, such as the pressure of the glove box can be automatically regulated under the conditions of the capacity of an exhaust system, the change of the ambient temperature and pressure, the blockage of a filter and the like; when the pressure reaches the upper and lower limit values, an alarm signal can be provided through a travel switch on the valve bracket 1.
2. The valve rod 6 is connected with the valve core 8 through a ball head, the connecting mode has an automatic alignment function, and even if the valve rod 6 slightly deviates, the valve core 8 can still be located at the position for plugging the valve seat 9.
3. The regulating valve adopts a double-diaphragm structure, and can be regulated when the pressure in the glove box is slightly changed. Compared with a single-diaphragm structure, the diaphragm structure has higher sensitivity and can generate larger thrust under the same pressure difference.
4. The use of the nuclear power station is met by selecting the gamma radiation resistant non-metallic material.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (9)
1. A self-operated negative pressure regulating valve is characterized by comprising a valve body, an upper negative pressure feedback chamber, an atmosphere chamber, a lower negative pressure feedback chamber and a support, wherein the valve body is provided with an inlet and an outlet, a valve seat is arranged in the valve body between the inlet and the outlet and can be plugged by a valve core connected to a valve rod, the upper negative pressure feedback chamber is arranged below the valve body, the atmosphere chamber is arranged below the upper negative pressure feedback chamber, the lower negative pressure feedback chamber is arranged below the atmosphere chamber, the support is supported below the lower negative pressure feedback chamber, the upper negative pressure feedback chamber and the lower negative pressure feedback chamber are both provided with feedback ports, one end of the upper negative pressure feedback chamber is an upper membrane assembly, one end of the lower negative pressure feedback chamber is a lower membrane assembly, and the valve rod penetrates through the upper negative pressure feedback chamber, The atmospheric chamber and the lower negative pressure feedback chamber are connected with the upper diaphragm assembly and the lower diaphragm assembly, and the tail end of the valve rod is provided with a balancing weight.
2. The self-operated negative pressure regulator valve according to claim 1, wherein the valve stem is connected to the valve core as a ball joint.
3. The self-operated negative pressure regulating valve according to claim 1, wherein an upper bellows is arranged in the valve body, and the upper bellows is sleeved outside the valve rod and separates the air pressure of the inlet and the air pressure of the outlet.
4. The self-operated negative pressure regulating valve according to claim 1, wherein a lower bellows is arranged in the atmosphere chamber, the lower bellows is sleeved outside the valve rod, and the lower bellows serves as a negative pressure passage and can verify the up-and-down movement of the valve rod.
5. The self-operated negative pressure regulator valve according to claim 1, wherein the upper diaphragm assembly is disposed at a lower end of the upper negative pressure feedback chamber.
6. The self-operated negative pressure regulator valve according to claim 1, wherein the lower diaphragm assembly is disposed at a lower end of the lower negative pressure feedback chamber.
7. The self-operated negative pressure regulating valve according to claim 1, wherein the upper diaphragm assembly and the lower diaphragm assembly are both made of ethylene propylene diene monomer.
8. The self-operated negative pressure regulating valve according to claim 1, wherein a travel switch is arranged on the bracket, a baffle is arranged above the counterweight block, and the travel switch realizes early warning of the limit position by touching the baffle.
9. The self-operated negative pressure regulating valve according to claim 8, wherein the bracket is provided with a waist-shaped hole extending along the longitudinal direction, and the travel switch is fixed by a threaded connector penetrating through the waist-shaped hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220055283.XU CN216692327U (en) | 2022-01-11 | 2022-01-11 | Self-operated negative pressure regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220055283.XU CN216692327U (en) | 2022-01-11 | 2022-01-11 | Self-operated negative pressure regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216692327U true CN216692327U (en) | 2022-06-07 |
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ID=81825705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220055283.XU Active CN216692327U (en) | 2022-01-11 | 2022-01-11 | Self-operated negative pressure regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216692327U (en) |
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2022
- 2022-01-11 CN CN202220055283.XU patent/CN216692327U/en active Active
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