CN211317606U

CN211317606U - Ultrahigh-pressure high-precision pressure transmitter

Info

Publication number: CN211317606U
Application number: CN202020243337.6U
Authority: CN
Inventors: 胡建田; 范建玲; 陈福钏; 白帆; 陈通照; 韩艺; 范叔妙; 范叔慈; 刘源; 范叔继
Original assignee: Zhejiang Aoxin Instrument Co Ltd
Current assignee: Zhejiang Aoxin Instrument Co Ltd
Priority date: 2020-03-03
Filing date: 2020-03-03
Publication date: 2020-08-21
Anticipated expiration: 2030-03-03

Abstract

The utility model discloses an ultrahigh pressure high-precision pressure transmitter, which comprises a pressure transmitter body, wherein the lower end of the pressure transmitter body is detachably provided with a locking base, the lower end of the locking base is detachably provided with a partition valve, the lower end of the partition valve is in threaded connection with a double-end screw sleeve, a pressure leading hole is vertically arranged in the double-end screw sleeve, the lower end of the double-end screw sleeve is in threaded connection with an instrument welding seat, and a pressure measuring hole is vertically arranged in the instrument welding seat; the isolating valve is characterized in that a Z-shaped flow channel and a conical head valve core are arranged in the isolating valve, a valve core cavity is arranged at the right end of the isolating valve, valve core sealing filler is arranged in the valve core cavity, a T-shaped head is integrally arranged at the outer end of the conical head valve core, a transmission rod is sleeved on the T-shaped head, and the inner end of the transmission rod is in floating connection with the T-shaped head. Above-mentioned technical scheme, structural design is reasonable, simple structure, measurement accuracy is high, difficult leakage, good reliability, long service life and practicality are good.

Description

Ultrahigh-pressure high-precision pressure transmitter

Technical Field

The utility model relates to a pressure transmitter technical field, concretely relates to super high-pressure high accuracy pressure transmitter.

Background

The reliability and the sealing performance of high pressure measurement are always the major problems to be solved by automation engineers, and the application of high pressure measurement is increasing along with the development of modern industry. Meanwhile, the requirements on environmental protection are higher and higher, the occurrence of trace leakage of dangerous media is not allowed, the fire resistance, the protection, the explosion suppression and the reliability of products are also higher and higher,

a pressure transmitter is a device that converts pressure into a pneumatic signal or an electric signal for control and remote transmission. It can convert the physical pressure parameters sensed by the load cell sensor into standard electric signals for the secondary instruments such as indicating alarm, recorder and regulator to measure, indicate and regulate the process.

However, the existing pressure transmitter has the following defects: the structure sets up unreasonablely, measurement accuracy is low, easily leaks, the reliability is poor, life is short and the practicality is poor.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a structural design is reasonable, simple structure, measurement accuracy is high, be difficult for leaking, good reliability, long service life and the good super high-pressure high accuracy pressure transmitter of practicality.

In order to achieve the above purpose, the utility model provides a following technical scheme: the ultrahigh-pressure high-precision pressure transmitter comprises a pressure transmitter body, wherein a locking base is detachably arranged at the lower end of the pressure transmitter body, a partition valve is detachably arranged at the lower end of the locking base, the lower end of the partition valve is in threaded connection with a double-end screw sleeve, a pressure leading hole is vertically arranged in the double-end screw sleeve, the lower end of the double-end screw sleeve is in threaded connection with an instrument welding seat, and a pressure measuring hole is vertically arranged in the instrument welding seat; the isolating valve is characterized in that a Z-shaped flow channel and a conical head valve core are arranged in the isolating valve, a valve core cavity is arranged at the right end of the isolating valve, valve core sealing filler is arranged in the valve core cavity, a T-shaped head is integrally arranged at the outer end of the conical head valve core, a transmission rod is sleeved on the T-shaped head, and the inner end of the transmission rod is in floating connection with the T-shaped head.

The utility model discloses further set up to: the inner end of the transmission rod is provided with a T-shaped groove matched with the size of the T-shaped head, and the T-shaped head is embedded in the T-shaped groove.

The utility model discloses still further set up to: the conical head valve core is further sleeved with a packing gland, the outer end of the valve core cavity is in threaded connection with a screw cap, a shaft penetrating hole is transversely formed in the middle of the screw cap, the transmission rod penetrates through the shaft penetrating hole, the inner end of the packing gland compresses the valve core sealing packing, and when the screw cap is screwed, the inner end face of the screw cap compresses the outer end face of the packing gland.

The utility model discloses still further set up to: the sensor mounting cavity is arranged in the locking base, the flameproof joint face is arranged in the sensor mounting cavity, the silicon sensor is embedded in the sensor mounting cavity, a connector is arranged at an upper port of the sensor mounting cavity, a connector through hole is vertically formed in the middle of the connector, flame-retardant epoxy resin is arranged in the connector through hole, and a pressure leading pipe is vertically arranged in the middle of the flame-retardant epoxy resin in a penetrating mode.

The utility model discloses still further set up to: the silicon sensor is characterized in that an annular groove is formed in the outer surface of the silicon sensor, a sensor sealing ring is sleeved in the annular groove, and the silicon sensor is sealed with the explosion-proof joint surface through the sensor sealing ring.

The utility model discloses still further set up to: the silicon sensor is a monocrystalline silicon sensor or a polycrystalline silicon sensor, the lower end face of the connector is pressed on the upper end face of the silicon sensor, and the lower end face of the flame-retardant epoxy resin is pressed on the upper end face of the silicon sensor.

The utility model discloses still further set up to: the lower extreme of pressure transmitter body and locking base upper end pass through helicitic texture and are connected fixedly or fix through bolted connection, and the lower extreme of pressure transmitter body and the upper end junction of locking base are provided with a first sealing washer at least.

The utility model discloses still further set up to: the closing valve upper end is provided with the pedestal connection chamber, is provided with connecting thread on the internal face in this pedestal connection chamber, locking base lower extreme and pedestal connection chamber pass through threaded connection fixed, and pedestal connection intracavity from last to having set gradually protection sealing washer, lip seal, T type reverse ring and the sealed face in the metal down, the lower extreme of locking base is provided with the sealed face of metal outer cone, constitute between the sealed face of metal outer cone and the sealed face of metal inner cone and seal.

The utility model discloses still further set up to: the base connecting cavity is of a step-shaped structure, and the inner wall surface of the base connecting cavity and the joint of the locking base form sealing through the protective sealing ring, the lip-shaped sealing ring and the T-shaped reverse ring.

The utility model discloses still further set up to: the closing valve is provided with a second sealing ring and a third sealing ring from top to bottom in sequence with the connection of the upper end of the double-head threaded sleeve, and the upper end of the double-head threaded sleeve is sealed with the connection of the closing valve through the second sealing ring and the third sealing ring.

The utility model discloses still further set up to: the double-end swivel nut lower extreme has set gradually fourth sealing washer and fifth sealing washer from last to down with instrument welded seat junction, the double-end swivel nut lower extreme constitutes sealedly through fourth sealing washer and fifth sealing washer and instrument welded seat junction.

The utility model has the advantages that: compared with the prior art, the utility model discloses the structure sets up more rationally, is equipped with sealed face in the interior awl, the Z type runner in the partition valve, and the setting of conveniently staggering can form both ends metal conical surface sealed, has avoided the drawback that original conventional inclined hole caused. The T-shaped head on the conical head valve core is in floating connection with the T-shaped groove on the transmission rod, so that the valve core can be automatically aligned and aligned when in a partition position, and the sealing performance of the ultrahigh pressure partition is ensured. The sealing rings are arranged at the two ends of the double-end screw sleeve, so that the sealing reliability is high; the structure design is reasonable, the structure is simple, the measuring precision is high, the leakage is not easy to occur, the reliability is good, the service life is long, and the practicability is good.

The invention is further described with reference to the drawings and the specific embodiments.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged view of section I of FIG. 1;

fig. 3 is an enlarged view of section II in fig. 1.

Detailed Description

In the description of the present embodiment, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", etc. appear, the indicated orientation or positional relationship thereof is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1, 2 and 3, the utility model discloses an ultrahigh pressure high accuracy pressure transmitter, including pressure transmitter body 1, the lower extreme of pressure transmitter body 1 can be dismantled and be provided with locking base 2, the lower extreme of locking base 2 can be dismantled and be provided with block valve 3, the threaded connection of block valve 3 lower extreme has double-end swivel nut 4, vertically in the double-end swivel nut 4 is provided with one and draws pressure hole 41, the threaded connection of double-end swivel nut 4 lower extreme has instrument welded seat 5, vertically in the instrument welded seat 5 is provided with pressure measurement hole 51; the isolating valve is characterized in that a Z-shaped flow channel 31 and a conical head valve core 6 are arranged in the isolating valve 3, a valve core cavity 32 is arranged at the right end of the isolating valve 3, valve core sealing filler 7 is arranged in the valve core cavity 32, a T-shaped head 61 is integrally arranged at the outer end of the conical head valve core 6, a transmission rod 8 is sleeved on the T-shaped head 61, and the inner end of the transmission rod 8 is in floating connection with the T-shaped head 61.

Preferably, the inner end of the transmission rod 8 is provided with a T-shaped groove 81 matched with the size of the T-shaped head 61, and the T-shaped head 61 is embedded in the T-shaped groove 81.

For making the utility model discloses the structure sets up more rationally, as preferred, this embodiment still the cover is equipped with gland 9 on the

conical head case

6, 32 outer end threaded connection in case chamber has screw cap 10, screw cap 10 middle part transversely is provided with one and wears to establish in wearing shaft hole 101, transfer line 8 wears to establish in wearing shaft hole 101, gland 9 the inner compresses tightly case sealing filler 7, when screw cap 10 screwed, the interior terminal surface that makes screw cap 10 compresses tightly gland 9's outer terminal surface.

Be provided with sensor installation cavity 21 in the locking base 2, be provided with flame proof composition surface 211 in the sensor installation cavity 21, the embedded type is provided with silicon sensor 11 in sensor installation cavity 21, the last port of sensor installation cavity 21 is provided with connector 12, the vertical connector through-hole 121 that is provided with in connector 12 middle part, be provided with fire-retardant epoxy 13 in the connector through-

hole

121, 13 vertical threads on fire-retardant epoxy middle part are equipped with the approach tube 14.

An annular groove 111 is formed in the outer surface of the silicon sensor 11, a sensor sealing ring 15 is sleeved in the annular groove 111, and the silicon sensor 11 is sealed with the explosion-proof joint surface 211 through the sensor sealing ring 15.

The silicon sensor 11 is a monocrystalline silicon sensor or a polycrystalline silicon sensor, the lower end face of the connector 12 is pressed against the upper end face of the silicon sensor 11, and the lower end face of the flame-retardant epoxy resin 13 is pressed against the upper end face of the silicon sensor 11.

The lower extreme of pressure transmitter body 1 and locking base 2 upper end pass through the helicitic texture and are connected fixedly or fix through bolted connection, and the lower extreme of pressure transmitter body 1 and the upper end junction of locking base 2 are provided with a first sealing washer 16 at least.

The upper end of the isolating valve 3 is provided with a pedestal connection cavity 33, the inner wall surface of the pedestal connection cavity 33 is provided with a connecting thread, the lower end of the locking base 2 is fixedly connected with the pedestal connection cavity 33 through the thread, the pedestal connection cavity 33 is internally provided with a protective sealing ring 17, a lip-shaped sealing ring 18, a T-shaped reverse ring 19 and a metal inner cone sealing surface 20 from top to bottom in sequence, the lower end of the locking base 2 is provided with a metal outer cone sealing surface 22, and a seal is formed between the metal outer cone sealing surface 22 and the metal inner cone sealing surface 20.

The base connecting cavity 33 is of a step-shaped structure, and the connection part of the inner wall surface of the base connecting cavity 33 and the locking base 2 is sealed through the protective sealing ring 17, the lip-shaped sealing ring 18 and the T-shaped reverse ring 19. Preferably, the metal outer cone sealing surface 22 and the metal inner cone sealing surface 20 form a first ultrahigh pressure metal sealing pair, the lip-shaped sealing ring 18 forms a second ultrahigh pressure lip-shaped sealing pair, and the protective sealing ring 17 forms a third O-shaped ring auxiliary sealing pair, so that the reliability is high.

The closing valve 3 has set gradually second sealing washer 23 and third sealing washer 24 with 4 upper end junctions from the top down of double-end swivel nut, 4 upper ends of double-end swivel nut constitute through second sealing washer 23 and third sealing washer 24 and closing valve 3 junction and seal.

The junction of the lower end of the double-end thread insert 4 and the instrument welding seat 5 is sequentially provided with a fourth sealing ring 25 and a fifth sealing ring 26 from top to bottom, and the junction of the lower end of the double-end thread insert 4 and the instrument welding seat 5 is sealed through the fourth sealing ring 25 and the fifth sealing ring 26.

During the practical application, be equipped with interior conical seal face, Z type runner in the partition valve, the convenient setting of staggering can form both ends metal conical surface sealed, has avoided the drawback that original conventional inclined hole caused. The T-shaped head on the conical head valve core is in floating connection with the T-shaped groove on the transmission rod, so that the valve core can be automatically aligned and aligned when in a partition position, and the sealing performance of the ultrahigh pressure partition is ensured. The sealing rings are arranged at the two ends of the double-end screw sleeve, so that the sealing reliability is high; the structure design is reasonable, the structure is simple, the measuring precision is high, the leakage is not easy to occur, the reliability is good, the service life is long, and the practicability is good.

The above embodiments are only used for further explanation of the present invention, and it is not understood that the present invention is limited by the protection scope of the present invention, and the technical engineers in the field are right according to the above contents of the present invention.

Claims

1. The utility model provides an ultrahigh pressure high accuracy pressure transmitter, includes pressure transmitter body (1), its characterized in that: the lower end of the pressure transmitter body (1) is detachably provided with a locking base (2), the lower end of the locking base (2) is detachably provided with a block valve (3), the lower end of the block valve (3) is in threaded connection with a double-end threaded sleeve (4), a pressure leading hole (41) is vertically arranged in the double-end threaded sleeve (4), the lower end of the double-end threaded sleeve (4) is in threaded connection with an instrument welding seat (5), and a pressure measuring hole (51) is vertically arranged in the instrument welding seat (5); the novel isolating valve is characterized in that a Z-shaped flow channel (31) and a cone head valve core (6) are arranged in the isolating valve (3), a valve core cavity (32) is arranged at the right end of the isolating valve (3), valve core sealing filler (7) is arranged in the valve core cavity (32), a T-shaped head (61) is integrally arranged at the outer end of the cone head valve core (6), a transmission rod (8) is sleeved on the T-shaped head (61), and the inner end of the transmission rod (8) is connected with the T-shaped head (61) in a floating mode.

2. The ultra-high pressure high precision pressure transmitter of claim 1, wherein: the inner end of the transmission rod (8) is provided with a T-shaped groove (81) matched with the T-shaped head (61) in size, and the T-shaped head (61) is embedded in the T-shaped groove (81).

3. The ultra-high pressure high precision pressure transmitter of claim 2, wherein: the conical head valve core (6) is further sleeved with a packing gland (9), the outer end of the valve core cavity (32) is in threaded connection with a screw cap (10), a through shaft hole (101) is transversely formed in the middle of the screw cap (10), the transmission rod (8) is arranged in the through shaft hole (101) in a penetrating mode, the inner end of the packing gland (9) compresses the valve core sealing packing (7), and when the screw cap (10) is screwed, the inner end face of the screw cap (10) compresses the outer end face of the packing gland (9).

4. The ultra-high pressure high precision pressure transmitter of claim 3, wherein: be provided with sensor installation cavity (21) in locking base (2), be provided with flame proof composition surface (211) in sensor installation cavity (21), embedded silicon sensor (11) that is provided with in sensor installation cavity (21), the last port of sensor installation cavity (21) is provided with connector (12), the vertical connector through-hole (121) that is provided with in connector (12) middle part, be provided with fire-retardant epoxy (13) in connector through-hole (121), vertical the wearing and tearing of fire-retardant epoxy (13) middle part are equipped with approach pipe (14).

5. The ultra-high pressure high precision pressure transmitter of claim 4, wherein: be provided with annular groove (111) on the surface of silicon sensor (11), sensor sealing washer (15) are established to annular groove (111) endotheca, silicon sensor (11) constitute sealedly through sensor sealing washer (15) and flame proof composition surface (211).

6. The ultra-high pressure high precision pressure transmitter of claim 5, wherein: the silicon sensor (11) is a monocrystalline silicon sensor or a polycrystalline silicon sensor, the lower end face of the connector (12) is pressed on the upper end face of the silicon sensor (11), and the lower end face of the flame-retardant epoxy resin (13) is pressed on the upper end face of the silicon sensor (11).

7. The ultra-high pressure high precision pressure transmitter of claim 6, wherein: the lower extreme of pressure transmitter body (1) is connected fixedly or is fixed through bolted connection with locking base (2) upper end through helicitic texture, and the lower extreme of pressure transmitter body (1) and locking base (2) upper end junction are provided with one first sealing washer (16) at least.

8. The ultra-high pressure high precision pressure transmitter of claim 7, wherein: the closing valve (3) upper end is provided with pedestal connection chamber (33), is provided with connecting thread on the internal face of this pedestal connection chamber (33), it is fixed that locking base (2) lower extreme and pedestal connection chamber (33) pass through threaded connection, and has set gradually protection sealing washer (17), lip sealing washer (18), reverse ring of T type (19) and the sealed face (20) of metal interior awl from last to down in pedestal connection chamber (33), the lower extreme of locking base (2) is provided with the sealed face (22) of metal exterior awl, constitute between the sealed face (20) of metal exterior awl (22) and the sealed face (20) of metal interior awl and seal.

9. The ultra-high pressure high precision pressure transmitter of claim 1, wherein: the closing valve (3) and double-end swivel nut (4) upper end junction from the top down have set gradually second sealing washer (23) and third sealing washer (24), double-end swivel nut (4) upper end is sealed through second sealing washer (23) and third sealing washer (24) and closing valve (3) junction constitution.

10. The ultra-high pressure high precision pressure transmitter of claim 1, wherein: double-end swivel nut (4) lower extreme and instrument welded seat (5) junction have set gradually fourth sealing washer (25) and fifth sealing washer (26) from last to down, double-end swivel nut (4) lower extreme constitutes sealedly through fourth sealing washer (25) and fifth sealing washer (26) and instrument welded seat (5) junction.