CN220365713U - Single screw pump with built-in safety valve - Google Patents
Single screw pump with built-in safety valve Download PDFInfo
- Publication number
- CN220365713U CN220365713U CN202321647311.8U CN202321647311U CN220365713U CN 220365713 U CN220365713 U CN 220365713U CN 202321647311 U CN202321647311 U CN 202321647311U CN 220365713 U CN220365713 U CN 220365713U
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- screw rod
- valve seat
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- cavity
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- 238000007789 sealing Methods 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000008676 import Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 12
- 238000005457 optimization Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model provides a take single screw pump of built-in relief valve, includes stator mechanism and screw rod mechanism, this screw rod mechanism is arranged in stator mechanism inner chamber, stator mechanism's inlet end cover is equipped with the tee bend cavity, screw rod mechanism is provided with the screw rod, and this screw rod is hollow structure, has seted up the backward flow mouth in this screw rod one end, this backward flow mouth with tee bend cavity intercommunication the other end of screw rod is provided with relief valve mechanism, the relief valve mechanism the pressure port with the inner chamber intercommunication of screw rod, the feed inlet with stator mechanism's discharge gate intercommunication. According to the utility model, materials enter the cavity of the screw rod through the feed inlet and the discharge outlet of the safety valve mechanism, then enter the three-way cavity through the return port, so that the external materials are limited from entering, the screw rod of the three-way cavity cannot be blocked to damage the motor, the purpose of protecting the motor, the stator mechanism and the screw rod mechanism is achieved, the safety valve mechanism is arranged in the cavity of the screw rod, the existing structure is fully utilized, and the volume is not increased.
Description
Technical Field
The utility model relates to the technical field of screw pump safety, in particular to a single-screw pump with a built-in safety valve.
Background
The screw pump is a single screw type transport pump, and its main working components are the screw of eccentric screw body and the screw bush whose inner surface is double-line screw surface. The principle of operation is that when the motor drives the pump shaft to rotate, the screw rotates around its own axis, and on the other hand it rolls along the inner surface of the bushing, thus forming a sealed chamber of the pump. The liquid in the sealing cavity advances by a screw pitch every time the screw rotates, and along with the continuous rotation of the screw, the liquid is pressed from one sealing cavity to the other sealing cavity in a spiral mode, and finally the pump body is extruded.
During operation of the pump, if the discharge pipeline is blocked, the pressure at the discharge end of the pump is increased sharply, and the pump is damaged due to overload in severe cases, and the motor is damaged. In order to prevent overload damage of the screw pump, a solution is generally adopted in which a relief valve is provided on the pump. When the discharge pressure exceeds a certain prescribed value, the pump is provided with a safety valve, and the safety valve is opened to guide the high-pressure medium at the discharge end to the inlet end, so that the pressure at the discharge end is reduced, the pressure at the discharge end is prevented from further rising, and the overload protection effect is achieved.
In the prior art, in order to adjust and simple to operate, mostly set up the relief valve outside the pump body, like patent 201821449700.9, the patent name is a sealed combination pressure relief device of direct drive screw pump, through passing the pressure relief nut 14 outward, carry out the pressure release, it is convenient to adjust at the peripheral hardware pressure release structure, but need solitary mounting structure to and the pressure release pipeline structure that corresponds, overall structure is complicated, and the cost is higher, has increased the volume of whole equipment simultaneously, and transportation and installation space will increase the flesh.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the defects of the prior art, the utility model provides a single-screw pump with a built-in safety valve, wherein the screw is of a hollow structure, the safety valve is arranged in a stator, and the safety valve and the screw are of an integrated structure.
2. Specific technical scheme
The utility model provides a take single screw pump of built-in relief valve, includes stator mechanism and screw rod mechanism, this screw rod mechanism is arranged in stator mechanism inner chamber, stator mechanism's inlet end cover is equipped with the tee bend cavity, screw rod mechanism is provided with the screw rod, and this screw rod is hollow structure, has seted up the backward flow mouth in this screw rod one end, this backward flow mouth with tee bend cavity intercommunication the other end of screw rod is provided with relief valve mechanism, the relief valve mechanism the pressure port with the inner chamber intercommunication of screw rod, the feed inlet with stator mechanism's discharge gate intercommunication.
When the utility model works, after the material pressure at the discharge hole is checked by the set value, the material enters the cavity of the screw rod through the feed inlet and the discharge hole of the safety valve mechanism, and then enters the three-way cavity through the return port, so that the outside material is limited from entering, the screw rod of the three-way cavity can not be blocked, the motor is damaged, and the purposes of protecting the motor, the stator mechanism and the screw rod mechanism are achieved.
As an optimization: the safety valve mechanism is provided with a valve seat, the valve seat is fixedly connected to the end part of the screw rod, a valve core is sleeved in the valve seat, a return spring is arranged in the valve core, an adjusting rod is arranged in the return spring in a penetrating mode, one end of the return spring is abutted to the bottom of the valve core, the other end of the return spring is abutted to a limiting ring of the adjusting rod, the outer end of the adjusting rod penetrates out of the valve seat, and the adjusting rod is connected with the valve seat in a rotating mode; the outer end of the valve seat is provided with a feed inlet, the side wall is provided with a pressure relief opening, the feed inlet of the valve seat corresponds to the bottom of the valve core, and the pressure relief opening of the valve seat corresponds to the outer wall of the valve core.
The whole valve seat is compact in structure, the valve seat is installed in the cavity of the screw rod by adjusting the depth of the adjusting rod extending into the valve core and adjusting the pressure value of pressure relief starting, the installation is convenient and firm, the cavity of the screw rod is adopted as a pressure relief loop, the whole structure is simple, and the setting of a special pressure relief loop is reduced.
As an optimization: one end of the three-way cavity is covered at the feeding port of the stator mechanism, and an inlet is formed in the side wall of the three-way cavity (3).
As an optimization: the valve seat is formed by buckling a first valve seat and a second valve seat, a sealing gasket is arranged between the first valve seat and the second valve seat, and the valve seat is split-type and convenient to install and detach.
As an optimization: the limiting ring of the adjusting rod is positioned inside the valve seat, the outer end of the adjusting rod is of a threaded rod structure, and the outer end of the adjusting rod is sleeved with a sealing ring and an adjusting nut. The pressure relief pressure is regulated through the regulating nut, so that the operation is convenient, and the structure is stable.
The beneficial effects of the utility model are as follows: 1. the material gets into inside the screw cavity through relief valve mechanism's feed inlet and discharge gate, then gets into the tee bend cavity through the back flow mouth in, and the external material of restriction gets into, makes its screw rod can not by the card dead, damages the motor, plays the purpose of protection motor and stator mechanism and screw rod mechanism to relief valve mechanism sets up in the cavity of screw rod, make full use of current structure, does not increase the volume.
2. The whole valve seat is compact in structure, the valve seat is installed in the cavity of the screw rod by adjusting the depth of the adjusting rod extending into the valve core and adjusting the pressure value of pressure relief starting, the installation is convenient and firm, the cavity of the screw rod is adopted as a pressure relief loop, the whole structure is simple, and the setting of a special pressure relief loop is reduced.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Detailed Description
The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1: the utility model provides a take built-in relief valve's single screw pump, includes stator mechanism 1 and screw rod mechanism 2, this screw rod mechanism 2 is arranged in stator mechanism 1 inner chamber, stator mechanism 1's inlet end cover is equipped with tee bend cavity 3, screw rod mechanism 2 is provided with screw rod 21, and this screw rod 21 is hollow structure, has seted up return port 22 in this screw rod 21 one end, this return port 22 with tee bend cavity 3 intercommunication the other end of screw rod 21 is provided with relief valve mechanism 23, this relief valve mechanism 23's pressure release mouth with the inner chamber intercommunication of screw rod 21, the feed inlet with stator mechanism 1's discharge gate intercommunication.
The safety valve mechanism 23 is provided with a valve seat 2301, the valve seat 2301 is fixedly connected to the end of the screw 21, a valve core 2302 is sleeved in the valve seat 2301, a return spring 2303 is arranged in the valve core 2302, an adjusting rod 2304 is penetrated in the return spring 2303, one end of the return spring 2303 is abutted to the bottom of the valve core 2302, the other end is abutted to a limiting ring of the adjusting rod 2304, the outer end of the adjusting rod 2304 penetrates out of the valve seat 2301, the outer end of the adjusting rod 2304 is of a threaded rod structure, and a sealing ring and an adjusting nut are sleeved at the outer end of the adjusting rod 2304;
the outer end of the valve seat 2301 is provided with a feed inlet, the side wall is provided with a pressure relief opening, the feed inlet of the valve seat 2301 corresponds to the bottom of the valve core 2302, and the pressure relief opening of the valve seat 2301 corresponds to the outer wall of the valve core 2302.
One end of the three-way cavity 3 is covered at the feed inlet of the stator mechanism 1, and an inlet 301 is formed in the side wall of the three-way cavity 3.
The valve seat 2301 is formed by buckling a first valve seat and a second valve seat, and a sealing gasket 2305 is arranged between the first valve seat and the second valve seat.
Working principle: external materials enter the three-way cavity 3 through the inlet 301, the screw mechanism 2 is started, the materials enter between the sucked screw 21 and the inner wall of the stator mechanism 1, and then are output from the discharge port under the extrusion fit of the screw mechanism 2 and the stator mechanism 1;
when the pressure of the discharge port is increased and exceeds the set pressure, the material at the discharge port extrudes the bottom of the valve core 2302, when the pressure exceeds the elasticity of the return spring 2303, the valve core 2302 moves towards the feed port end, the material at the discharge port end enters the inner cavity of the screw rod 21 through the pressure relief port and then enters the three-way cavity 3 through the return port 22, and thus the circulation is performed, the external material does not enter or enters the three-way cavity 3 in a small amount under the condition that the pressure of the discharge port is always larger than the set value, the screw rod 21 can be ensured to continuously rotate, the rotation can not be blocked, and the motor and the whole screw pump component are ensured not to be damaged.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (5)
1. The utility model provides a take single screw pump of built-in relief valve, includes stator mechanism (1) and screw rod mechanism (2), and this screw rod mechanism (2) are arranged in stator mechanism (1) inner chamber, the import end cover of stator mechanism (1) is equipped with tee bend cavity (3), its characterized in that: screw rod mechanism (2) are provided with screw rod (21), and this screw rod (21) are hollow structure, have seted up return port (22) in this screw rod (21) one end, this return port (22) with tee bend cavity (3) intercommunication the other end of screw rod (21) is provided with relief valve mechanism (23), the pressure release mouth of this relief valve mechanism (23) with the inner chamber intercommunication of screw rod (21), the feed inlet with the discharge gate intercommunication of stator mechanism (1).
2. The single screw pump with built-in safety valve according to claim 1, wherein: the safety valve mechanism (23) is provided with a valve seat (2301), the valve seat (2301) is fixedly connected to the end part of the screw rod (21), a valve core (2302) is sleeved in the valve seat (2301), a return spring (2303) is arranged in the valve core (2302), an adjusting rod (2304) is arranged in the return spring (2303) in a penetrating mode, one end of the return spring (2303) is abutted to the bottom of the valve core (2302), the other end of the return spring is abutted to a limiting ring of the adjusting rod (2304), the outer end of the adjusting rod (2304) penetrates out of the valve seat (2301), and the adjusting rod (2304) is in rotary connection with the valve seat (2301);
the outer end of the valve seat (2301) is provided with a feed inlet, the side wall of the valve seat (2301) is provided with a pressure relief opening, the feed inlet of the valve seat (2301) corresponds to the bottom of the valve core (2302), and the pressure relief opening of the valve seat (2301) corresponds to the outer wall of the valve core (2302).
3. The single screw pump with built-in safety valve according to claim 1, wherein: one end of the three-way cavity (3) is covered at the feed inlet of the stator mechanism (1), and an inlet (301) is formed in the side wall of the three-way cavity (3).
4. The single screw pump with built-in safety valve according to claim 2, wherein: the valve seat (2301) is formed by buckling a first valve seat and a second valve seat, and a sealing gasket (2305) is arranged between the first valve seat and the second valve seat.
5. The single screw pump with built-in safety valve according to claim 2, wherein: the limiting ring of the adjusting rod (2304) is positioned in the valve seat (2301), the outer end of the adjusting rod (2304) is of a threaded rod structure, and the outer end of the adjusting rod (2304) is sleeved with a sealing ring and an adjusting nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321647311.8U CN220365713U (en) | 2023-06-27 | 2023-06-27 | Single screw pump with built-in safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321647311.8U CN220365713U (en) | 2023-06-27 | 2023-06-27 | Single screw pump with built-in safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220365713U true CN220365713U (en) | 2024-01-19 |
Family
ID=89513739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321647311.8U Active CN220365713U (en) | 2023-06-27 | 2023-06-27 | Single screw pump with built-in safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220365713U (en) |
-
2023
- 2023-06-27 CN CN202321647311.8U patent/CN220365713U/en active Active
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