CN218823565U

CN218823565U - Pressure test fixture

Info

Publication number: CN218823565U
Application number: CN202222634417.6U
Authority: CN
Inventors: 孙东奎
Original assignee: Beijing Jiahe Petroleum Technology Co ltd
Current assignee: Beijing Jiahe Petroleum Technology Co ltd
Priority date: 2022-10-08
Filing date: 2022-10-08
Publication date: 2023-04-07
Anticipated expiration: 2032-10-08

Abstract

The utility model relates to a frock clamp technical field especially relates to a pressure test fixture. Comprises a clamp main body, a screw rod, a nut, a pressure sensor and a connecting part. The anchor clamps main part is equipped with the installation department and places the portion, and lead screw, pressure sensor all place in the installation cavity. The pressure sensor and the screw rod are connected to the screw nut through threads. The connecting part is arranged at one end of the screw rod facing the placing part. One end of the guide rod is connected with the guide hole of the mounting cavity, and the other end of the guide rod is connected with the connecting part. The utility model discloses a can be stable continuous carry out a new technical scheme of power value test to the object that awaits measuring to thereby rotate the lead screw and drive connecting portion and move the test that awaits measuring thing position realized the power value as the principle with the holding state in order to form.

Description

Pressure test fixture

Technical Field

The utility model relates to a frock clamp technical field especially relates to a pressure test fixture.

Background

The existing pressure measurement clamp finishes measurement by clamping and fixing a measured object, and due to various structures of the tested object, the clamp possibly deviates from a tested point in the detection process when being clamped by a common clamp, so that normal detection is influenced, and the detection efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

In view of this, the present disclosure provides a pressure test fixture. According to an aspect of the present disclosure, a utility model technique is provided that can solve traditional anchor clamps and hold unstably.

The pressure test fixture provided for realizing the purpose of the utility model comprises a fixture main body, a screw rod, a nut, a pressure sensor and a connecting part;

the clamp main body is provided with an installation part and a placing part, the installation part and the placing part are oppositely arranged, the placing part is suitable for placing an object to be tested, and the installation part is provided with an installation cavity;

the screw nut and the pressure sensor are both positioned in the mounting cavity, and the pressure sensor is respectively connected with the inner side wall of the mounting cavity and the outer side wall of the screw nut;

the screw rod is matched with the nut, and one end of the screw rod faces the placing part;

the connecting part is arranged at one end of the screw rod, which faces the placing part, and is suitable for clamping an object to be tested;

the installation department is equipped with the guiding hole, guiding hole and guide post phase-match, and the axis of guide post is the same with the axial direction orientation of lead screw, and the one end setting of guide post is in the guiding hole, and the other end and the connecting portion of guide post are connected.

In one embodiment, the clamp body is "C" -shaped;

the mounting part is provided with a wire outlet hole, and the outer side of the mounting part is communicated with the mounting cavity through the wire outlet hole;

the placing part is provided with a positioning hole, the positioning hole is arranged on the clamp main body, and the positioning hole is suitable for mounting and fixing the clamp main body.

In one specific embodiment, the device further comprises an upper cover;

the upper cover sets up the portion one side of placing that deviates from at pressure sensor, and the middle part of upper cover is equipped with the hole of stepping down, and the upper cover is established on the screw through the hole cover of stepping down.

In one embodiment, the middle part of the pressure sensor is provided with a mounting hole, and the pressure sensor is sleeved on the screw through the mounting hole.

In one specific embodiment, the device further comprises a hand wheel;

the hand wheel and the connecting part are respectively arranged at two opposite ends of the screw rod.

In one embodiment, the clamp body is further provided with a tool hole;

the tool hole is close to the placing part and is suitable for fixing the tool of the tested object.

In one embodiment, the connecting portion includes a guide suspension plate and a connecting member.

In one embodiment, the guide suspension plate is fixed coaxially with the connecting member, and the guide suspension plate is connected with one end of the guide post.

In one embodiment, the connecting piece is fixed at the bottom end of the connecting part and is suitable for clamping the tested object.

In one specific embodiment, the device further comprises a bearing cover, a bearing and a bottom plate;

the middle part of the bearing cover is provided with a mounting hole, and the bearing cover is sleeved at one end of the screw rod, which faces the placing part, through the mounting hole;

the bearing is arranged between the bearing cover and the screw rod;

the bottom plate is fixed on the lower end face of the screw rod.

The utility model has the advantages that: the utility model discloses a pressure test anchor clamps are through setting up direction transmission structure, and the lead screw accomplishes the downstream and does not squint under the traction of guide post. During actual measurement, the coaxial connection device can ensure that the tested object and the connecting piece bearing point are coaxial under the condition of simple operation, solves the problem of unstable clamping of the existing clamp, improves the measurement efficiency and shortens the measurement time.

Drawings

Fig. 1 is a schematic view of a sectional structure of an embodiment of the pressure testing fixture of the present invention;

fig. 2 is a top view of an embodiment of a pressure test fixture of the present invention;

fig. 3 is a side view of an embodiment of a pressure test fixture of the present invention;

fig. 4 is a working diagram of an embodiment of the pressure testing jig of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "top", "bottom", "inner", "outer", "axis", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention or to simplify the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," "engaged," "hinged," and the like are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In this embodiment, the fixture body 100 is provided with an installation portion and a placement portion, the installation portion is disposed opposite to the placement portion, the placement portion is suitable for placing a hydraulic module to be tested, and the installation portion is provided with an installation cavity. The nut 150 and the pressure sensor 140 are both positioned in the installation cavity, and the pressure sensor 140 is respectively connected with the inner side wall of the installation cavity and the outer side wall of the nut 150; the lead screw 120 is matched with the nut 150, the outer wall of the lead screw 120 is in a thread form, one end of the lead screw 120 faces the placing part and is screwed into the inner side of the nut 150 from the upper end of the mounting part of the clamp main body 100, and the lead screw 120 is in threaded connection with the nut 150. The connecting part is arranged at one end, facing the placing part, of the screw rod 120 and is suitable for clamping the hydraulic module to be tested. The installation part is provided with a guide hole 116, the guide hole 116 is matched with the guide column 190, the axis of the guide column 190 is the same as the axis of the screw rod 120 in the direction, one end of the guide column 190 is arranged in the guide hole 116, and the other end of the guide column 190 is connected with the connecting part.

The application is suitable for holding the hydraulic module to be tested and measuring the force value of the hydraulic module piston under the working state of the hydraulic module to be tested. The clamp main body 100 is provided with a mounting part, the mounting part is provided with a mounting cavity and is suitable for mounting a nut 150, a pressure sensor 140 and a screw rod 120, the screw rod 120 is screwed into the inner side of the nut 150 from the upper end of the mounting part of the clamp main body 100, so that the screw rod 120 can vertically move relative to the nut 150, and the moving direction is always parallel to the nut 150; the pressure sensor 140 is in threaded connection with the nut 150, so that the force transmission is more rigorous; the connecting part is arranged at one section of the screw rod 120 facing the placing part and moves along with the screw rod 120 to clamp and release the hydraulic module piston; the guide post 190 and the guide hole 116 are matched, so that the guide post 190 can move vertically in the guide hole 116, meanwhile, under the condition that the guide post 190 is connected with the connecting part, the guide hole 116 and the screw nut 150 play a role in restraining, the coaxiality of the screw rod 120 and the connecting part can be accurately restrained, the screw rod 120 and the connecting part are kept to move vertically and longitudinally relative to the placing part, and therefore the piston of the hydraulic module is accurately restrained to be coaxial with the force bearing point of the connecting part, and the test condition of the hydraulic module is achieved.

In one possible implementation, the mounting portion is provided with a through hole 113, and the outside of the mounting portion and the mounting portion cavity communicate through the through hole 113. The clamp body is provided with a positioning hole 117.

Further, the outer side of the mounting part is communicated with the mounting part cavity through a through hole 113 and is suitable for transmitting a sensor wire, the mounting part is provided with a through groove 120, and the through groove 120 is suitable for avoiding a screw for fixing the wire on the pressure sensor 140; the positioning hole 117 is disposed at one side of the placing portion and has a circular structure, and the positioning hole 117 is suitable for mounting and fixing the jig to other devices as needed.

In a possible implementation manner, the upper cover 130 is a cylinder, the middle part of the upper cover is provided with a yielding hole, the inner side of the yielding hole is provided with threads, and the end surface of the yielding hole is provided with four screw holes which are symmetrical about the center of a circle. The upper cover 130 is arranged on the side, away from the placing part, of the pressure sensor 140, the upper cover 130 is fixed with the inner wall of the installation cavity through a screw 131, and the upper cover 130 is sleeved on the screw nut 150 through the abdicating hole to form a closed environment.

Here, what need to explain is, the utility model discloses mainly for hydraulic module carries out the power value test, need guarantee pressure test anchor clamps's meticulous in the test process, if there is the clearance between upper cover 130 and the anchor clamps main part 100, can lead to lead screw 120 and screw 150 can't closely be fixed, when lead screw 120 vertical motion, probably produce the former orbital condition of moving of skew, the thread clearance is too big simultaneously, just means that the atress loading end of screw thread diminishes, not only can influence the leakproofness of anchor clamps and can lead to the screw thread to overload and thread-off even. In order to eliminate the influence of the thread clearance on the normal work of the clamp, a locking nut can be added at the upper end of the upper cover 130, so that the tightness of the clamp is improved, the measurement error is reduced, and the measurement result is more real and effective.

In one possible implementation, the pressure sensor 140 has a cylindrical structure, a mounting hole is formed in the middle of the pressure sensor, and the inner side of the mounting hole is in a thread pattern; the screw nut 150 has threads on both the inside and outside, the radius of the bottom end is greater than the radius of the top end, and the section is in a convex shape. The outer side of the pressure sensor 140 is fixed on the inner wall of the mounting cavity through a screw 141, and the inner side of the pressure sensor 140 is in threaded connection with the outer side of the nut 150.

Here, it should be noted that, the end face of the pressure sensor 140 is provided with four screw holes symmetrical about the circle center, the outer side of the pressure sensor 140 is fixed on the inner wall of the mounting cavity through four screws 141, and the inner side of the pressure sensor 140 is connected with the screw through threads, so that the firm mounting of the pressure sensor can be ensured, the condition that the pressure sensor 140 is loosened in the working process of the pressure testing clamp is avoided, the process that the force is transmitted from the connecting part to the pressure sensor is ensured to be more meticulous, and the force value testing of the pressure sensor is ensured to be real and effective.

In one possible implementation, the handwheel 110 includes a wheel, three joysticks 115, a connection sleeve 114; one ends of three control levers 115 are respectively connected with the wheel disc, and the other ends are connected with the connecting sleeve 114; the inner side of the connecting sleeve 114 is provided with a flat key 111, the connecting sleeve 114 is in key connection with one end of the screw rod 120, which is far away from the placing part, through the flat key 111, so as to form a condition that the movement of the screw rod 120 can be adjusted by rotating the hand wheel 110, and the hand wheel 110 and the connecting part are respectively arranged at two opposite ends of the screw rod 120.

In a possible implementation manner, the fixture main body 100 is provided with a tool hole 118, the tool hole 118 is provided on the fixture main body at the lower end of the placing portion, and the tool hole 118 is suitable for fixing a tool of the hydraulic module.

In one possible embodiment, the connecting part is arranged at one end of the spindle 120 facing the placing part. The connecting part comprises a guide suspension plate 180 and a connecting piece 182, the guide suspension plate 180 is disc-shaped, the end surface of the guide suspension plate is provided with four screw holes which are symmetrical about the circle center, and the guide suspension plate is riveted below the bearing cover through screws 181; a connecting ring 183 extends from one side of the guide suspension plate 180, the inner wall of the connecting ring 183 is in a thread form, and one end of the guide column 190 facing the placing part is in threaded connection with the connecting ring 183 on one side of the guide suspension plate 180.

Here, it should be noted that the guide suspension plate 180 is coaxially disposed with the connecting member 182. The connector is adapted to contact the hydraulic module piston. In the working process of the pressure test fixture, the guide suspension plate 180 and the connecting piece 182 move vertically along with the screw rod 120, and under the combined action of the guide column 190 and the guide suspension plate 180, the piston of the hydraulic module can be accurately constrained to be coaxial with the force bearing point of the connecting piece 182.

In a possible implementation manner, the bearing cap 161 is a hollow cylinder, the radius of the bottom end is larger than that of the top end, the section is in a "convex" shape, the inner wall contains threads, and the inner wall is fixed at one end of the screw rod 120 facing the placing part through the threads; the plane of the bottom end of the bearing cap 161 contains four screw holes which are symmetrical about the circle center and are riveted above the guide suspension plate 180 through screws. The bearing 160 is disposed between the lead screw 120 and the bearing cap 161, and is a rolling bearing, which is composed of an outer ring, an inner ring, a group of steel balls, and a group of retainers. The base plate 170 is fixed to an end surface of the screw rod 120 facing one end of the placing portion by a screw 171, and the base plate 170 has a sealing effect while ensuring uniform stress of the respective parts.

Here, it should be noted that the bearing adopts a deep groove ball bearing, the friction resistance of the deep groove ball bearing is small, the rotation speed is high, and the deep groove ball bearing can be used for a machine element bearing radial load or bidirectional axial load, when the clamp works, the deep groove ball bearing can transmit the force of the screw rod along the motion direction to the bottom plate and the guide suspension plate, and can also transmit the force received by the connecting piece to the mounting part, and plays a role of fixing parts.

The working process of the device is as follows: the hand wheel 110 is connected with the screw rod 120 through the flat key 111, when measurement starts, the hand wheel 110 is rotated anticlockwise or clockwise, the screw rod 120 is stressed to move upwards or downwards relative to the placing part under the action of the flat key 111, the guide column 120 and the screw nut 150 play a role in traction, the screw rod 120 can be kept to vertically move longitudinally relative to the placing part, and meanwhile, under the action of the guide suspension plate 180, the hydraulic module piston and the force bearing point of the connecting piece 182 can be accurately restrained to be coaxial. The connecting member 182 moves downward until it contacts the hydraulic module piston and stops rotating the hand wheel, thus achieving a stable testing environment.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," "one specific embodiment," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, a schematic representation of the term does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can equally replace or change the technical solution and the inventive concept of the present invention within the scope of the present invention.

Claims

1. A pressure test fixture, comprising:

the clamp comprises a clamp body, a screw rod, a nut, a pressure sensor and a connecting part;

the nut and the pressure sensor are both positioned in the installation cavity, and the pressure sensor is respectively connected with the inner side wall of the installation cavity and the outer side wall of the nut;

the connecting part is arranged at one end of the screw rod, which faces the placing part, and is suitable for clamping the object to be tested;

the installation department is equipped with the guiding hole, guiding hole and guide post phase-match, the axis of guide post with the axial direction orientation of lead screw is the same, the one end setting of guide post is in the guiding hole, the other end of guide post with connecting portion connect.

2. The pressure test fixture of claim 1, wherein the fixture body is "C" -shaped;

the placing part is provided with a positioning hole, the positioning hole is formed in the clamp main body, and the positioning hole is suitable for mounting and fixing the clamp main body.

3. The pressure test fixture of claim 1, further comprising an upper cover;

the upper cover sets up deviating from of pressure sensor place portion one side, the middle part of upper cover is equipped with the hole of stepping down, the upper cover passes through the hole cover of stepping down is established on the screw.

4. The pressure test fixture of claim 3, wherein the pressure sensor is provided with a mounting hole in the middle;

the pressure sensor is sleeved on the nut through the mounting hole.

5. The pressure test fixture of claim 4, further comprising a hand wheel;

6. The pressure test fixture of claim 1, wherein the fixture body is further provided with a tooling hole;

the tool hole is close to the placing part and is suitable for fixing a tool of a tested object.

7. A pressure test fixture as claimed in any one of claims 1 to 6, wherein the connection portion comprises a guide suspension plate and a connector.

8. The pressure test fixture of claim 7, wherein the guiding suspension plate is coaxially fixed with the connecting piece, and the guiding suspension plate is connected with one end of the guiding column.

9. The pressure test fixture of claim 7, wherein the connecting member is fixed to a bottom end of the connecting portion and adapted to hold an object under test.

10. The pressure test fixture of claim 1, further comprising a bearing cap, a bearing, and a base plate;

the bearing is placed between the bearing cover and the screw rod;

the bottom plate is fixed on the lower end face of the screw rod.